Patent Publication Number: US-2022213693-A1

Title: Tile with imitation grout line

Description:
CLAIM OF PRIORITY 
     This application is a Continuation-in-Part of a currently pending patent application having Ser. No. 17/002,418, filed on Aug. 25, 2020 and set to issue as U.S. Pat. No. 11,149,442 on Oct. 19, 2021, which is a continuation of currently pending patent application having Ser. No. 16/358,241 and a filing date of Mar. 19, 2019, which itself is a Continuation in Part (CIP) of a patent application having Ser. No. 16/196,974 and a filing date of Nov. 20, 2018, which claims priority to a Continuation in Part (CIP) patent application having Ser. No. 15/950,046 and a filing date of Apr. 10, 2018 and which matured into U.S. Pat. No. 10,132,088 on Nov. 20, 2018, which in turn claimed priority to a patent application having Ser. No. 15/454,650 and a filing date of Mar. 9, 2017, which matured into U.S. Pat. No. 9,938,726 on Apr. 10, 2018, which in turn claimed priority to a U.S. provisional patent application having Ser. No. 62/380,122 and a filing date of Aug. 26, 2016. In addition, the present application claims priority to a currently pending Continuation in Part (CIP) patent application having Ser. No. 15/949,979 and a filing date of Apr. 10, 2018, which is set to issue as U.S. Pat. No. 10,233,656 on Mar. 19, 2019, which also claims priority to the above-referenced patent application having Ser. No. 15/454,650 and a filing date of Mar. 9, 2017, which matured into U.S. Pat. No. 9,938,726. All of the foregoing applications and patents are incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention is directed to a tile, such as a flooring tile, which in most embodiments is made entirely from synthetic materials and having an appearance of real marble, stone, ceramic or wood, and which offers a highly realistic looking but imitation grout line formed along the length of one or more of its sides. The inventive tile comprises at least a top layer and a core layer, and during the manufacturing process, at least a portion of the top layer is formed so as to define an exposed portion along at least one side of the tile, which extends outwardly below and away from the top surface of the tile. In some embodiments, the top layer may comprise only a veneer layer, or one or more coatings of material with the appearance of wood or stone applied by printing thereon. The exposed portion of the tile may comprise a textured surface or be otherwise structured to closely resemble the look and feel of an actual grout line, and further, may include a colorant to correspond with the overall intended color of the resulting tile. In one or more additional embodiments, the inventive tile includes a protective section structured to avoid or reduce staining of the exposed portion that closely resembles an actual grout line. 
     Description of the Related Art 
     During the construction of a home, building or other structure, there will almost always be an unfinished floor surface such as a slab of concrete, a wood sub-structure or the like, which needs to be finished to offer a more appealing and/or polished appearance. It is also true that there will almost always be an unfinished wall surface made of a wood substructure, having dry wall affixed thereto, or another substructure such as concrete or concrete block. In many cases, tiles will be used to finish either a floor surface or a wall surface, with the tiles often being made of real marble or stone, or depending on budgetary constraints, of porcelain or ceramic. Traditionally, such tiles are secured to the unfinished floor slab or wall surface using a cement-like mixture, with one or more tiles disposed closely next to each other, and leaving a small separation between the sides of adjacent tiles. Forming this separation between tiles is often tedious and requires the use of spacers to ensure uniformity and alignment of the tiles. Also, this separation will later be filled with a grout mixture as part of the installation process, which creates a “grout line” around the sides of the tiles. In general, the process of installing tile and creating the grout line involves a significant amount of time, which adds to the labor and overall cost of the project. 
     Over the last several years, flooring products and tiles have been made from synthetic materials and configured to imitate the look of a real tile of marble, stone or ceramic. For example, laminate and vinyl flooring products are known, including some that imitate the look of real stone, marble, or ceramic tiles. These flooring products create an optical or visual illusion so that the surface of the tile looks like real stone, marble or ceramic or even like real wood flooring. Traditionally, however, such flooring products are manufactured so as to require that the individual tiles be installed directly next to each other, often in abutting relation, although some of these products are installed with a slight separation between them to facilitate installation on uneven floor surfaces. While this slight separation may be observable and in some cases may appear as a small seam or even as a micro groove, these types of known tiles do not offer any structure to represent or closely resemble the look and feel of a real grout line. This is also true of existing imitation flooring products having an interconnecting mechanism to facilitate installation, such as correspondingly disposed “tongue” and “groove” structures formed along a side of a tile. Additionally, some laminate flooring planks are known to offer an optical illusion of having a grout line, but in reality, the seams of such flooring planks and/or tiles are completely flat and have imitation grout lines drawn and shaded on the edges by an artist to give the impression of depth. 
     It would therefore be ideal if a tile were made so as be formed from synthetic materials so as to offer the appearance of genuine wood or stone, and also so as to reliably include an artificial but highly realistic looking grout line. Any such tile would preferably also include a top layer and a rigid core layer, at least partially or fully into which the artificial grout line is formed. 
     While some flooring products or tiles exist, none are believed to have ever featured one with a top layer of material, such as but not limited to a polyvinyl chloride (PVC) material having an optimal density or other characteristics so that a portion thereof can be exposed during the manufacturing process to form an imitation grout line with a highly realistic look and feel of an actual grout line. Furthermore, no such tiles or flooring products are believed to have ever featured a top layer of material, such as polyvinyl chloride (PVC), combined with a colorant during the manufacturing process so as to provide a variety of colors for the imitation grout line that will match with or closely correspond to the overall color of the resulting tile. 
     Additionally, of the known flooring products or tiles that exist, none are believed to feature a rigid core layer formed of a densified foam material or a stone plastic composite material and having optimal density ranges or other characteristics that render it sufficiently rigid and durable for a wide variety of applications. 
     Also, and even though some of the existing imitation flooring products have correspondingly disposed “tongue” and “groove” structures formed along a side of a tile, there are drawbacks associated with these when it is desired to use such flooring products on a wall surface, as opposed to a floor surface. More specifically, the installation process for such products on a vertical surface, such as a wall, is cumbersome and further, remains labor intensive and therefore costly. As such, there is room for improvements in the structuring of such tiles for interconnection and installation on a vertical surface, such as a wall. 
     Accordingly, it would be beneficial if an improved tile or flooring product made from synthetic materials were developed, such as but not limited to one having a core layer made at least in part from a densified foam material, or from a stone plastic composite material, so as to be sufficiently rigid and durable for a wide variety of applications, and further, which is capable of being easily and quickly installed, even on a vertical surface, such as a wall. Additionally, if any such improved tile or flooring product were developed, it would also be beneficial if it could be made to include a top layer of material, such as but not limited to a polyvinyl chloride (PVC) material, that is capable of being readily formed during the manufacturing process to achieve a desired appearance, such as the look of natural wood, stone, etc. and at least partially into or through which, an artificial but realistic looking grout line could be formed. 
     SUMMARY OF THE INVENTION 
     The present invention is intended to present a solution to these and other needs which remain in this field of art, and as such, is directed to a tile, primarily but not exclusively intended for use in flooring applications, that imitates the look and feel of a real tile surface such as stone, ceramic, or marble, and the like, including the look of wood flooring, and further, which is formed from material(s) that can be made in a variety of different colors and designs. The present invention is also directed, however, to a tile that is structured to have an imitation grout line, but with a highly realistic look and feel similar to an actual grout line, formed on or substantially along at least one side or edge of the tile. Additionally, the tile of the present invention may be manufactured in different dimensions of varying length and width, and may also be produced in a variety of shapes such as, but not limited to, rectangular, square, hexagonal, or octagon, and others. As will also be described with regard to at least one or more other embodiments, the tile of the present invention may also be manufactured so as to include a very thin veneer layer of genuine wood or stone, or top layer of another material or coating of material. 
     As will become clear from the description which follows, the tile of the present invention comprises at least a top layer and a core layer. The top layer in most embodiments, but not all, comprises generally a layer made from a vinyl composite material, including a synthetic plastic polymer such as, but not limited to, polyvinyl chloride (PVC). However, in some embodiments described herein, particularly wherein the core layer of the inventive tile is made from a stone plastic composite (SPC), which may also be referred to at times as a stone polymer composite (SPC), a top layer or section comprising a polyvinyl chloride (PVC) material is not needed, while in one or more other embodiments, a top layer or section may be included which may comprise a decorative layer and a wear layer. Additionally, it should be noted the core layer of at least one embodiment of the present invention may comprise yet additional types of material compositions, provided such material composition possesses sufficiently rigid properties for use in flooring applications. Accordingly, such a core layer may comprise various densities, various amounts of polyvinyl chloride (PVC) or other like synthetic plastic polymers, and/or various amounts of calcium carbonate or other like chemical compounds. 
     Even further, the top layer may instead comprise alternate materials. For instance, as previously stated, the top layer and/or top section may comprise a veneer layer, such as a very thin layer of genuine wood or stone. Alternatively, the top layer, whether as a veneer layer or other layer of material may instead comprise a coating of material, such as but not limited to an enamel coating, which may itself comprise a fill coat or any other like topically applied material, such as an acrylic and/or polycrylic coating, or a coating of polyurethane and/or ethoxyline resin. In such embodiments, the coating of material, such as an enamel coating, may be applied to or disposed directly onto the core layer and may comprise a clear and/or a colored appearance, such as white, beige, grey, black, some combination thereof, or otherwise. In at least one embodiment of the present invention, the coating of material, such as an enamel coating, may be applied onto the core layer when in liquid form, such as through one or more spraying processes. And, in embodiments wherein the core layer is naturally porous due to its chemical composition, such as when the core layer is comprised of a stone plastic composite material and/or a stone polymer composite material, the coating of material, such as an enamel coating, may be predisposed to seal such inherent porosity, thereby filling in any gaps and/or crack inherent in the core layer. In this sense, it may be understood such top layer and/or section need not comprise an actual layer of solid material adhesively joined to the core layer; but rather, may merely comprise a topical liquid applied onto the core layer, before subsequently being allowed to dry. 
     It may be understood that once applied to the core layer, the coating of material, such as but not limited to an enamel coating, may function as a primer of sorts, wherein the surface of the core layer is rendered smooth, and suitable for the application of at least one design element thereon. As further described herein, such at least one design element may comprise, for instance, textures, grooves, impressions, undulations, color or graphical designs, or any other feature now known or hereafter developed, and may be applied to the tile by printing thereon. For instance, such at least one design element may be configured or printed to imitate the look and feel of real materials, such as real stone or marble, or real wood. 
     In most embodiments, but not all, the top layer of the inventive tile comprises at least one PVC layer, as described above. However, in at least one preferred embodiment, the top layer additionally comprises both a wear layer and/or a decorative layer. Also, the top layer of the tile, and particularly the wear layer in said one or more embodiments, is formed to have a selected thickness depending upon the intended use of the tile such as residential, light contract, heavy commercial, or other type of use. Moreover, the density of the polyvinyl chloride (PVC) layer material is such that the inventive tile(s) may be readily modified during the manufacturing process to achieve the desired effect of offering a highly realistic looking grout line when viewed by a person standing on or near the floor surface. Also during the manufacturing process, the top surface of the tile, defined by the top layer and specifically, by the wear layer in one or more embodiments, may be pressed or otherwise modified to achieve a variety of textured surfaces thereon, which help to provide the tile with an appearance of real marble, stone, ceramic or of a real wood surface or other natural textures. The core layer of the inventive tile comprises a rigid and waterproof material. More specifically, the core layer comprises a “densified foam” material in several embodiments. Also, the material composition and density range of the densified foam ensure that the core layer, and consequently the tile(s), is/are both relatively lightweight and yet sufficiently rigid and durable for flooring applications. In some cases, the core layer comprising a densified foam material may be referred to as a Wood Plastic Composite (WPC), but the composition of the core layer should not be construed as being limited to this. Additionally, the core layer may have a smooth texture. Further, the core layer may comprise one or more sublayers that serve as an underlayment. These sublayers may be made from other materials such as, but not limited to, laminate foil, cork, foam, or ethyl vinyl acetate. 
     The inventive tile also comprises an exposed portion that extends outwardly from and along the length of at least one side of the tile that is structured to simulate a grout line. The exposed portion is associated with a sidewall and defines a gap that preferably extends uniformly and substantially along the side of the tile. The exposed portion additionally comprises a textured surface structured to closely simulate the appearance of a real grout line. The exposed portion may also be formed on one or more layers of the inventive tile so as to have realistic looking dimensions and coloring. As illustrated in several of the Figures, the exposed portion is formed along at least one side of the inventive tile, but in other embodiments, may be disposed along more than one side or even along all sides of the tile. This exposed portion is preferably formed on the tile during the manufacturing process, as opposed to during installation. During the manufacturing process, a tool, such as but not limited to a knife, cutting blade(s) and the like, may be configured and used to remove a portion of the top surface of the tile uniformly along at least one selected side thereof, or even across a central or middle portion thereof, and will expose at least a portion of the top layer of the tile, and in some embodiments may expose a portion of the core layer. Additionally, the knife, cutting blade(s) or other tool may also modify the exposed portion, such as by further cutting and/or profiling of it so as to provide the textured appearance that closely simulates the look and feel of a real grout line. 
     In one or more additional embodiments, the present invention further includes a protective section disposed between a top section and a core layer of the tile, which includes an exposed portion formed to closely resemble a real grout line, as described herein. The protective section is structured to at least partially reduce and/or avoid staining of the exposed portion comprising the imitation grout line. The protective section comprises at least a protective layer, and in some embodiments may comprise a clear polyvinyl chloride (PVC) material that is resistant to abrasion, and that is structured to avoid or reduce staining. In a preferred embodiment, the protective section additionally comprises a decorative layer disposed under the protective layer and made of a very thin, film-like material, such as PVC, and which further includes a colorant. In one or more of these embodiments of the invention, the exposed portion may be formed directly on the protective section, and more specifically, on the protective layer. 
     In at least one additional embodiment, the tile according to the present invention may further include a vinyl layer joined to the top section. The vinyl layer may also be joined to a core layer below, although a core layer is not strictly required. In tiles comprising a vinyl layer, an exposed portion configured to imitate a grout line may be formed on at least a portion of the top section of the tile. In embodiments of the tile comprising a vinyl layer, the top section may comprise a first and a second wear layer, as well as a first and a second decorative layers. The first wear layer is generally coincident with the top surface of the tile. The first decorative layer is generally disposed below the first wear layer and is structured to imitate the feel of a natural material such as, but not limited to, naturally occurring stone or wood. The Second wear layer is generally disposed below the first decorative layer and comprises a substantially equivalent structure to the first wear layer. The second decorative layer is generally disposed below the second wear layer and has a color that corresponds to an intended grout color. Generally, the exposed portion structured to imitate a grout line may be defined by exposing at least a portion of the second wear layer. 
     Additional features of the tile of the present invention include an interconnecting mechanism formed on at least one side of the tile to facilitate installation. For example, the interconnecting mechanism may comprise a “tongue” formed along one side of a tile, and a “groove” formed along one side of a different tile, and which are cooperatively structured to be matingly interconnected so as to join two different tiles together along their correspondingly disposed sides. Additionally, the “tongue” side and/or the “groove” side may each be configured to accommodate the exposed portion defining a gap along a side or edge of the tile. In one or more other embodiments, the inventive tile includes at least an extended interconnecting mechanism to facilitate installation of the tile on a vertical surface, such as a wall, as well as on other surfaces. 
     Other features of the tile of the present invention include a bevel comprising a slanted edge, formed on the side(s) of the tile, and specifically, adjacent to the exposed portion of the tile and textured surface. The sidewall associated with the exposed portion may include the bevel at an upper portion thereon, and in general, the bevel helps to more closely simulate the look and feel of a real grout line. The bevel may be formed in a variety of sizes, but in one embodiment, the angle of inclination of the bevel, with respect to the top surface of the tile, will be in a range between about 30° to about 90° although in an illustrated embodiment, this angle will be closer to about 12°. In general, in embodiments having a bevel, the intended width of the resulting simulated grout line will be a factor in determining the steepness of a corresponding angle of inclination. For example, a steeper angle of inclination may correspond to a grout line having a smaller width, while a less steep angle of inclination may correspond to a grout line having a larger width. Alternatively, the bevel may have a modified structure, such as a two staged descent from the top surface of the tile to the exposed portion and textured surface simulating a grout line. In another embodiment, the bevel may comprise a “micro” bevel. 
     In further embodiments of the present invention, for instance those wherein the top section of the tile merely comprises an enamel coating applied directly onto the core layer, with the enamel coating having at least one design element printed thereon, such a top section may further comprise a shielding layer. Such a shielding layer may be configured to, for instance, protect the tile from liquids, spills, abrasions, and deformations, and may be, in at least one embodiment, substantially transparent, such that the design feature(s) present on the enamel coating are visible. In at least one embodiment of the present invention, such a shielding layer may comprise a topical coating, such as an acrylic solution, which may be applied through spray procedures or any other like process configured to apply a liquid coating onto the top surface of the tile. Alternatively, such a shielding layer may comprise a wear layer akin to the one previously discussed. Conversely, such a shielding layer may instead comprise a film layer, which itself may comprise a thin sheet of polypropylene, polyvinyl chloride, or some other material akin thereto, such as a thermoplastic polymer or a synthetic plastic polymer. As may be understood, alternative types, compositions, thickness, and material properties of such a shielding layer may vary dependent upon the intended application of the tile of the present invention. For instance, the use of the tile in residential, light contract, or heavy commercial applications may dictate the requisite properties of the shielding layer. 
     A primary object of the present invention is to provide a tile suitable for use as a flooring surface, which is made from synthetic materials and closely imitates the look of real stone, marble, ceramic or even wood flooring, but which also offers an imitation grout line with a highly realistic look and feel similar to that of an actual grout line. 
     Another primary object of the present invention is to provide an inventive tile made from synthetic material(s) that can be readily formed during the manufacturing process to define an exposed portion including a gap substantially or entirely along a selected side thereof and that can be readily profiled to achieve a texture surface thereon which closely matches the look and feel of an actual grout line. 
     Yet another primary object of the present invention is to provide a tile with a highly realistic looking and yet imitation grout line that can also be manufactured in variety of colors so as to offer a close match with and consistency of color relative to the overall color of the resulting tile, which has not been achieved before in any existing products. 
     An advantage of the tile of the present invention in at least some embodiments is that the material(s) used to make it is/are relatively lightweight and yet sufficiently rigid and durable for a wide variety of applications, and is/are also waterproof. 
     A feature of the tile of the present invention is that in at least some embodiments there is an interconnecting mechanism formed along at least one edge thereof or more that facilitates the assembly and installation process. 
     Another advantage of the tile of the present invention is that the materials(s) used to make it are capable of assuming a variety of different shapes, colors and/or designs. 
     These and other objects, features and advantages of the present invention will become clearer when the drawings as well as the detailed description are taken into consideration. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a fuller understanding of the nature of the present invention, reference should be had to the following detailed description, as taken in connection with the accompanying drawings, in which: 
         FIG. 1  is a transverse sectional view of a tile in accordance with the present invention comprising a top layer and a core layer, and illustrating an exposed portion formed in the top layer. 
         FIG. 2  is also a transverse sectional view of a tile in accordance with the present invention comprising a top layer and a core layer similar to  FIG. 1 , but illustrating the top layer as including both a polyvinyl chloride (PVC) layer and a wear layer. 
         FIG. 3  is also a transverse sectional view of a tile in accordance with the present invention comprising a top layer and a core layer similar to  FIG. 1 , but illustrating the top layer as including a polyvinyl chloride (PVC) layer, a decorative layer and a wear layer. 
         FIG. 4  is also a transverse sectional view of a tile in accordance with the present invention comprising a top layer and a core layer similar to  FIG. 2 , including the top layer having a polyvinyl chloride (PVC) layer and a wear layer, but illustrating the exposed portion formed on the core layer. 
         FIG. 5  is also a transverse sectional view of a tile in accordance with the present invention comprising a top layer and a core layer similar to  FIG. 3 , including the top layer having a polyvinyl chloride (PVC) layer, a decorative layer and a wear layer, but illustrating the exposed portion formed on the core layer. 
         FIG. 6  is also a transverse sectional view of a tile according to the present invention, but illustrating a preferred embodiment of the top layer and exposed portion, as well as a core layer and an interconnecting mechanism. 
         FIG. 7 -A is also a transverse sectional view of a tile according to the present invention in another preferred embodiment comprising at least a top layer that includes a polyvinyl chloride (PVC) layer, and a core layer, and also an interconnecting mechanism, and illustrating an exposed portion having an imitation grout line formed in the PVC layer. 
         FIG. 7 -B is also a transverse sectional view of a tile according to the present invention in yet another embodiment comprising at least a top layer, and a core layer, along with an interconnecting mechanism, and illustrating an exposed portion having an imitation grout line formed on the core layer. 
         FIG. 8  is a perspective view of the embodiment of the invention shown in  FIG. 1  comprising a top layer and a core layer. 
         FIG. 9  is also a perspective view of the invention similar to  FIG. 1  but illustrating another embodiment wherein the tile comprises and a top layer including a wear layer, a decorative layer and a polyvinyl chloride (PVC) layer, as well as a core layer, and further, showing the exposed portion formed with most of the top layer removed so as to be disposed into the PVC layer. 
         FIG. 10  is also a perspective view of the invention similar to  FIG. 1  but illustrating the embodiment wherein the tile comprises a top layer including a wear layer, a decorative layer and a polyvinyl chloride (PVC) layer, and further, showing the exposed portion having an imitation grout line formed on the core layer. 
         FIG. 11  is a perspective exploded view of the embodiment represented in  FIG. 9 . 
         FIG. 12  is a transverse sectional view of one embodiment according to the present invention having a bevel formed on the top layer. 
         FIG. 13  is a transverse sectional view of an alternative embodiment according to the present invention having a bevel formed on the core layer. 
         FIG. 14  is a transverse section view of yet another embodiment according to the present invention having a micro bevel formed on a top layer. 
         FIG. 15 -A is a plan view of one preferred embodiment according to the present invention showing a tile comprising an exposed surface with an imitation grout line formed on all of its sides. 
         FIG. 15 -B is a plan view of several tiles, each similar to the tile depicted in  FIG. 15 -A with an exposed portion and imitation grout line formed on all of its sides, interconnected together to create a floor or wall covering. 
         FIG. 16 -A is a plan view of another preferred embodiment according to the present invention showing a tile comprising an exposed surface with an imitation grout line formed on two of its sides. 
         FIG. 16 -B is a plan view of several tiles, each similar to the tile depicted in  FIG. 16 -A with an exposed portion and imitation grout line formed on two of its sides, interconnected together to create a floor or wall covering. 
         FIG. 17 -A is a plan view of another preferred embodiment according to the present invention showing a tile comprising an imitation grout line formed on two adjacent sides. 
         FIG. 17 -B is a plan view of another preferred embodiment according to the present invention showing a plurality of interconnected tiles each comprising an imitation grout line formed on two adjacent sides. 
         FIG. 18  is a plan view of another embodiment of a tile according to the present invention, comprising an elongated interconnecting mechanism and an exposed portion structured to imitate a grout line. 
         FIG. 19  is a perspective view of another embodiment of a tile according to the present invention comprising a top section and a core layer and having an elongated interconnecting mechanism formed along one side thereof, and a mating interconnecting mechanism formed along an oppositely disposed side thereof. 
         FIG. 20  is a transverse sectional view of the embodiment of a tile shown in  FIG. 19 . 
         FIG. 21  is a transverse sectional view of another embodiment of a tile according to the present invention comprising a top section and a core layer, with interconnecting mechanism formed along opposite sides thereof, and including an exposed portion structured to imitate a grout line. 
         FIG. 22  is a transverse sectional view of a portion of two different tiles, each similar to that shown in  FIG. 21 , but illustrating the tiles matingly connected to each other. 
         FIG. 23  is a front view of two tiles, each similar to that shown in  FIG. 21 , illustrating a positioning of one tile relative to another in preparation for installation on surface. 
         FIG. 24  is a plan view of a plurality of tiles formed in accordance with one or more embodiments of the present invention, and illustrating the positioning and installation thereof on drywall surface, which itself is represented in a cutaway view. 
         FIG. 25  is a plan view of a plurality of tiles in another embodiment according to the present invention, wherein each tile comprises an additional exposed portion formed substantially across a middle section of the tile, as well as an exposed portions formed along one or more sides of the tile. 
         FIG. 26  is a transverse sectional view of another embodiment of a tile according to the present invention comprising a top section and a core layer. 
         FIG. 27  is a perspective view of the tile shown in  FIG. 26 . 
         FIG. 28  is a transverse sectional view of yet another embodiment of two tiles according to the present invention comprising a top section and a core layer. 
         FIG. 29  is a transverse sectional view of yet another embodiment of a tile according to the present invention comprising a protective section, a top section, and a core layer. 
         FIG. 30  is a transverse sectional view of one embodiment of a tile according to the present invention comprising a protective section with a protective layer and a decorative layer. 
         FIG. 31  is a transverse sectional view of another embodiment of a tile according to the present invention comprising a protective section with a protective layer and a decorative layer. 
         FIG. 32  is a transverse sectional view of one embodiment of a tile according to the present invention comprising a protective section, a top section, and a core layer, wherein an exposed portion is formed on a middle section of the tile. 
         FIG. 33A  is a transverse sectional view of yet another embodiment of a tile according to the present invention comprising at least a vinyl layer and a top section, as well as an exposed portion formed in the top section, and a core layer which is optional. 
         FIG. 33B  is a transverse sectional view of yet another embodiment of a tile according to the present invention having a vinyl layer, and a top section comprising a first and a second wear layer and a first and a second decorative layer. 
         FIG. 34  is a transverse sectional view of still another embodiment of a tile according to the present invention having a vinyl layer, and an exposed portion formed on at least a portion of a core layer. 
         FIG. 35A  is a transverse sectional view of another embodiment of a tile according to the present invention comprising a vinyl layer, and an exposed portion formed substantially across a middle section of the tile. 
         FIG. 35B  is a transverse sectional view of another embodiment of a tile according to the present invention comprising a vinyl layer, and an exposed portion formed on a second wear layer substantially across a middle section of the tile. 
         FIG. 36A  is a transverse sectional view of one embodiment of a tile according to the present invention comprising a vinyl layer and a top section, as well as an exposed portion formed on the top section of the tile substantially above an interconnecting mechanism. 
         FIG. 36B  is a transverse sectional view of another embodiment of a tile according to the present invention having a vinyl layer, and an exposed portion formed on a second wear layer of the top section of the tile substantially above an interconnecting mechanism comprising a male member. 
         FIG. 37  is a transverse sectional view of another embodiment of a tile according to the present invention having a vinyl layer, and an exposed portion formed on the top section of the tile substantially above an interconnecting mechanism comprising a female member. 
         FIG. 38  is a transverse sectional view of another embodiment of a tile according to the present invention comprising a vinyl layer, and an exposed portion formed on the top section of the tile substantially across a middle section of the tile. 
         FIG. 39  is a transverse sectional view of yet another embodiment of a tile according to the present invention comprising two vinyl layers, and an exposed portion formed on the top section of the tile. 
         FIG. 40  is a transverse sectional view of yet another embodiment of a tile according to the present invention comprising a top section and core layer having an exposed portion formed within such core layer. 
         FIG. 41  is a transverse sectional view of yet another embodiment of a tile according to the present invention comprising a top section and a core layer having an exposed portion formed within such core layer, such exposed portion having at least one protective coating disposed thereon. 
         FIG. 42  is a transverse sectional view of yet another embodiment of a tile according to the present invention comprising a top section, a core layer, and an exposed portion, wherein such top section comprises an enamel coating having at least one design element imparted thereon, and further comprising a shielding layer. 
         FIG. 43  is a transverse sectional view of yet another embodiment of a tile according to the present invention comprising a top section and a core layer, wherein such top section comprises an enamel coating having at least one design element imparted thereon, such top section further comprising a shielding layer, wherein such tile comprises at least two exposed portions, wherein one such exposed portion is formed at a midpoint of the tile. 
     
    
    
     Like reference numerals refer to like parts throughout the several views of the drawings. 
     DETAILED DESCRIPTION 
     The present invention is directed towards a tile  1 , such as a flooring tile, made from synthetic materials and so as to imitate the look and feel of real stone, marble, ceramic, wood or other materials, but which is further structured to offer a simulated grout line, with a highly realistic look and feel, on or along at least one side or edge of the tile  1 . While the tile  1  of the present invention is particularly well suited for use as a flooring tile, it may also readily be used on wall surfaces or in a variety of other applications, and should not be considered as being limited only to flooring applications. As will also be described with regard to at least one embodiment, the tile  1  of the present invention may also be manufactured so as to include a very thin veneer layer of genuine wood or stone. 
     In general terms, the tile  1  of the present invention comprises an upper or top section, a lower or core section, and a plurality of sides. For example, and with reference to  FIGS. 1 and 8 , the upper or top section may be defined by a top layer  20 , and the lower or core section may be defined by a core layer  30 . As shown in  FIG. 1 , the top layer  20  comprises a first surface  22  that at least partially defines a top surface  10  of the tile  1 , as well as a lower or second surface  24 . The core layer  30  comprises an upper or third surface  32  adhered to or otherwise connected to the lower or second surface  24  of the top layer  20 , so as to join the top layer  20  and core layer  30  together. The core layer  30  also comprises a fourth surface  34  that generally defines the bottom surface  12  of the tile  1 , which will be adhered to an unfinished slab of concrete or other floor surface in a building. In some embodiments, however, the core layer  30  can include sublayers, such as a sound proofing or other material. 
     The tile  1  of the present invention may be formed in part from a vinyl material or a vinyl composite material, and may be referred to as a Vinyl Composite Tile (VCT). Although the top or upper section may be formed from a variety of materials, vinyl material(s) are preferred for a number of reasons, including the ability to offer a quality product at an affordable price point. The top layer  20  comprises a vinyl composite or a synthetic plastic polymer such as polyvinyl chloride (PVC). However, in at least one alternative embodiment, the tile of the present invention may include a top section comprised of a very thin layer of genuine wood or stone. As described more in detail herein, in most embodiments the top layer  20  will include a layer of polyvinyl chloride (PVC), such as a plasticized and/or extruded PVC, having a density that allows for a realistic looking grout line to be readily and consistently formed. 
     With reference now to  FIGS. 2 through 7 -B, and  9 - 11 , in some embodiments the top layer  20  will comprise additional layers. For example, and as shown in  FIGS. 2 and 4 , the top layer  20  is illustrated as comprising a wear layer  50  and a polyvinyl chloride (PVC) layer  40 . In these and other embodiments, the wear layer  50  includes a top surface  52  which is entirely or at least partially coincident with the top surface  10  of the tile. The wear layer  50  may vary in thickness according to its intended use such as residential, light contract, heavy commercial or other type of use. The wear layer  50  will preferably be formed during the manufacturing process so as to include one or more design features, such as a texture with some undulation to imitate the look and feel of real stone or marble or a texture that has grooves and/or other impressions to imitate the look and feel of, for example, a real piece of wood. In the embodiments shown in  FIGS. 2 and 4 , the polyvinyl chloride (PVC) layer  40 , such as extruded PVC, is generally disposed between the wear layer  50  and the core layer  30 . For example, the polyvinyl chloride (PVC) layer  40  may be connected at its upper surface  42  by way of adhesives and/or pressing to a lower surface  54  of the wear layer  50 , and similarly connected at its lower surface  44  to an upper surface  32  of the core layer  30 . The polyvinyl chloride (PVC) layer  40  may comprise a material of synthetic plastic polymer such as polyvinyl chloride (PVC) or may be made out of or so as to include other materials. However, since it includes polyvinyl chloride (PVC) it will be referred to herein throughout as the polyvinyl chloride (PVC) layer  40 . In the preferred embodiments the polyvinyl chloride (PVC) layer  40  has a density in a range of between generally about 2,000 kg/m3 (124.856 lb/ft3) to about 2,400 kg/m3 (149.827 lb/ft3). In at least one embodiment, the density of the polyvinyl chloride (PVC) layer  40  is generally about 2,000 kg/m3 (124.856 lb/ft3). In at least one or more additional embodiments, however, the polyvinyl chloride (PVC) layer comprises another density which can be anywhere in a range from generally about 1,600 kg/m3 (about 99.884 lb/ft3) up to generally about 2,600 kg/m3 (about 162.313 lb/ft3). 
     With reference now to  FIGS. 3, 5, 6, 7 -A and  7 -B, and  FIGS. 9-11 , the top layer  20  of the inventive tile  1  may comprise a wear layer  50 , a polyvinyl chloride (PVC) layer  40  and also a decorative layer  60 . The decorative layer  60  may comprise a film or sheet that may be made from a variety of materials such as, but not limited to, polyvinyl chloride (PVC). The decorative layer  60  will also preferably comprise one or more design features that help to provide an authentic look of a selected material, such as real stone, real marble, ceramic, wood, or another surface. For example, the decorative layer  60  may comprise a film having decorative features corresponding to the look and coloring of a natural wood grain or a wood flooring plank. In the embodiments of  FIGS. 3, 5 through 7B, and 9-11 , the decorative layer  60  is disposed in interconnecting relation between the wear layer  50  and the polyvinyl chloride (PVC) layer  40 . These layers may be adhesively connected or interconnected by a variety of adhesives known in the art, such as but not limited to glue. For example, and as can be appreciated from  FIGS. 9 and 11 , the decorative layer  60  includes an upper surface  62  connected to the lower surface  54  of the wear layer  50 , and also, a lower surface  64  connected to the upper surface  42  of the polyvinyl chloride (PVC) layer  40 . Additionally, the wear layer  50  may be made so as to have a substantially translucent or transparent appearance. When the wear layer  50  is made of a translucent or transparent material, it permits the design features carried on the decorative layer  60  to be readily seen there-through. In one or more embodiments, a coating of another material may be applied to the top surface  10  of the wear layer  50 . By way of example, this coating may comprise a ethoxyline resin (ER) or a polyurethane (PU) material, which may be cured using an ultra-violet (UV) lighting and heating process. It is within the scope of this invention, however, to provide a tile  1  with or without the decorative layer  60 . 
     Additionally, it is within the scope of the present invention to provide a tile  1  that comprises waterproofing properties. As such, the materials of the different layers of the top layer  20  as well as of the core layer  30 , may all comprise waterproofing properties. Similarly, adhesives used to connect these layers may also have waterproof properties. 
     As mentioned previously, the material composition of the top layer  20  may vary, but in at least one embodiment, the top layer  20  generally comprises a mixture of polyvinyl chloride (PVC), as well as calcium powder, oil, and a foaming agent. In one preferred embodiment, the material composition of the top layer  20  may be about 20% to about 30% polyvinyl chloride (PVC), about 60% to about 70% calcium power, about 5% to about 10% oil, and about 0.5% to about 5% foaming agent. 
     The tile  1  of the present invention also includes a lower or core portion, which may be defined by a core layer  30  as shown in  FIGS. 1-14 . The core layer  30  is preferably formed from a material to allow the tile  1  to be rigid as well as waterproof. In the preferred embodiments, the core layer  30  comprises a densified foam material, and further, will preferably be relatively light weight. In some cases, the core layer comprising a densified foam material may be referred to as a Wood Plastic Composite (WPC), but the composition of the core layer should not be construed as being limited to this. Additionally, the core layer  30  may have a smooth texture. In some embodiments, the tile  1  may comprise one or more sublayers joined to the core layer  30  to serve as an underlayment or to attenuate sound. These sublayers may be made of other materials such as laminate foil, cork, foam, or ethyl vinyl acetate. 
     While the material composition of the core layer  30  may vary, it comprises in at least one embodiment a combination of a synthetic plastic polymer such as polyvinyl chloride (PVC), calcium powder, and a foaming agent. In a preferred embodiment, the densified foam material of core layer  30  comprises polyvinyl chloride (PVC) in an amount of generally between about 50% to about 55%, calcium powder in an amount of generally between about 40% to about 45%, and foaming agent in an amount of generally between about 5% to about 10%. The foaming agent may be a mixture of materials that enhance stability. In another preferred embodiment, the densified foam material of core layer  30  comprises a foam sheet formed from polyvinyl chloride (PVC) in an amount of generally between about 45% to about 50%, calcium powder in an amount of generally between about 45% to about 50%, and foaming agent in an amount of generally between about 5% to about 10%. In yet another preferred embodiment, the densified foam material of core layer  30  comprises a foam sheet formed from polyvinyl chloride (PVC) in an amount of generally about 46.5%, calcium powder in an amount of generally about 46.5%, and foaming agent in an amount of generally about 7%. 
     Also in certain preferred embodiments of the tile  1 , the core layer  30  comprising a densified foam material will have a density within an optimal range from about 800 kg/m3 (which is about 49.942 lb/ft3) to about 900 kg/m3 (which is about 56.185 lb/ft3), which aids in ensuring that the tile  1  is sufficiently rigid and durable for flooring applications. In another preferred embodiment, which is helpful to flooring applications, the density of the core layer  30  is between about 850 kg/m3 (which is about 53.064 lb/ft3) to about 900 kg/m3 (which is about 56.185 lb/ft3). It should be appreciated that while this is considered an optimal range, the density of the core layer  30  can also vary outside of this range, and still be within the spirit and scope of the present invention. 
     For example, in one or more alternative embodiments of the inventive tile  1 , the core layer  30  may comprise a different density, such as within a range from about 500 kg/m3 (about 31.214 lb/ft3) to about 2,000 kg/m3 (about 124.856 lb/ft3). In at least one or more additional embodiments, the core layer  30  may comprise a different density in a range anywhere from generally about 500 kg/m3 (about 31.214 lb/ft3) up to generally about 1,500 kg/m3 (about 93.642 lb/ft3). As a specific but non-limiting example, and with reference to  FIGS. 18-24 , the inventive tile  1  can also be readily used as a wall panel, with several such wall panels being used to cover a wall surface. Since wall panel(s) will not be subject to a load from foot traffic or from the weight of heavy items such as furniture, etc., the inventive tile  1  may have core layer  30  with a lower density in a different optimal range of about 500 kg/m3 (about 31.214 lb/ft3) to about 900 kg/m3 (about 56.185 lb/ft3). As will be described in more detail subsequently herein, with regard to wall installations, the inventive tile  1  having a core layer  30  within this lower density range is advantageous as it provides for a relatively flexible tile  1  that facilitates installation, particularly when a connector is used, or when a number of connectors are used, to attach the tile to a surface, such as a wall. 
     As another example, however, in one or more alternative embodiments of the inventive tile  1 , the core layer  30  may comprise a different density, such as within a range from about 1,200 kg/m3 (about 74.914 lb/ft3) to about 2,000 kg/m3 (about 124.856 lb/ft3). 
     As yet another specific and non-limiting example, and with reference to  FIGS. 26-28 , the inventive tile  1  can include a core layer  230  formed of a stone plastic composite (SPC) material which, if used primarily to cover a floor surface, will be subject to heavier loads from foot traffic, the weight of furniture and the like. Therefore, the core layer  230  in such alternative and other embodiments intended for flooring applications may have a higher density, as will be described in more detail subsequently herein. 
     In general, the overall thickness of the tile  1  may range from about 4 millimeters to about 12 millimeters (which is from about 0.157 inches to about 0.472 inches), depending on the particular embodiment. In one or more embodiments of the tile  1 , the overall thickness of the tile  1  from the top surface  10  of the top layer  20  to the bottom surface  34  of the core layer  30  will preferably be generally about 7 millimeters (about 0.275 inches), with the core layer  30  having a thickness in a range of generally between 4 millimeters to about 6 millimeters (about 0.016 inches to about 0.236 inches). In embodiments of the tile  1  wherein the top layer  20  includes a wear layer  50  and a polyvinyl chloride (PVC) layer  40 , the top layer  20  may comprise a thickness of about 1.5 millimeters (about 0.059 inches) to about 2 millimeters (0.079 inches). For example, the wear layer  50  between its top surface  52  and lower surface  54  may be in a range of between generally about 0.3 millimeters (about 0.012 inches) to about 0.7 millimeters (about 0.028 inches). Also, the thickness of the polyvinyl chloride (PVC) layer  40  between its top surface  42  and lower surface  44  may be in a range of between generally about 1.0 millimeters (about 0.039 inches) to about 1.5 millimeters (about 0.059 inches), or even to about 2.0 millimeters (0.079 inches). 
     In embodiments of the tile  1  including a decorative layer  60 , such as shown in  FIGS. 3, 5 through 7 -B, and  9 - 11 , the thickness of the decorative layer  60  between its top surface  62  and bottom surface  64  may be in a range of generally about 0.05 millimeters (about 0.002 inches) to about 0.1 millimeters (about 0.004 inches). As illustrated in  FIG. 6 , the core layer  30  may comprise a thickness of about 5 millimeters (about 0.197 inches), with the top layer  20  comprising a thickness of generally about 2 millimeters (about 0.079 inches), including a wear layer  50  having a thickness of about 0.5 millimeters (about 0.02 inches), a polyvinyl chloride (PVC) layer  40  having a thickness of about 1.43 millimeters (about 0.056 inches), and a decorative layer  60  having a thickness of about 0.07 millimeters (about 0.003 inches). As mentioned above, the thickness of the tile  1  may range from about 4 millimeters (about 0.016 inches) to about 12 millimeters (about 0.472 inches). 
     However, and in other embodiments, the inventive tile  1  may have a different overall thickness and still be within the intended spirit and scope of the present invention. Some non-limiting examples of such alternative embodiments will be described with reference to  FIGS. 26 through 28 . 
     In one alternative embodiment, however, and as best shown in  FIGS. 4-5, and 7 -B, the inventive tile  1  may comprise a polyvinyl chloride layer  40  having a substantially reduced thickness between its top surface  42  and lower surface  44 . For example, the thickness of the polyvinyl chloride (PVC) layer  40  may be approximately 0.3 millimeters (about 0.012 inches), which as described subsequently herein, may facilitate exposing at least a portion of the core layer  30  as the exposed portion  18  during the manufacturing process. In such embodiments, the overall thickness of the tile  1  will be generally about 5 millimeters (about 0.197 inches) to about 6.5 millimeters (about 0.256 inches), and preferably, approximately 5.9 millimeters (about 0.232 inches). 
     As noted above, the tile  1  of the present invention additionally comprises a plurality of sides, such as  16  or  16 ′, and may also come in different shapes and in varying dimensions. For example, and as shown in the illustrative embodiments of  FIGS. 8-11 and 15 -A to  17 -B, the tile  1  of the present invention may have a substantially rectangular shape with four sides  16  or  16 ′. The dimensions of such a tile  1  having a rectangular shape may be, by example only, twelve (12″) inches by twenty-four (24″) inches, but can readily be varied to other appealing dimensions, and may even assume a much longer length so as to be a wall plank or floor plank of, for example, twelve (12″) inches by forty-eight (48″) inches, which can be cut into individual panels. As another example, the tile  1  of the present invention might have a square shape. Moreover, the tile  1  of the present invention might also have six or eight sides  16  or  16 ′ as is the case with tiles having hexagonal or octagonal shapes. Other shapes, including those comprising an uneven number of sides, are also possible depending on the overall desired visual effect. 
     The tile  1  of the present invention also includes along at least one of its sides, such as  16 , an exposed portion  18 . As illustrated in  FIGS. 1-14 , this exposed portion  18  extends outwardly below and away from the top surface  10  of the tile  1 , and is defined in part by a sidewall  15  formed within at least said top layer  20 . As will be described subsequently herein, the exposed portion  18  effectively defines a gap  14  in the plane of the top surface  10  of the tile  1  that, as perhaps best shown in  FIGS. 8-14 , preferably extends uniformly and either completely or substantially along the length of the side  16 . In at least one embodiment, such as is illustrated in  FIG. 6 , this exposed portion  18  is configured to be located at a depth of generally about 0.9 millimeters (about 0.035 inches) from a top surface  10  of the tile, or in a range from about 0.9 millimeters (about 0.035 inches) up to about 2 millimeters (about 0.079 inches) from the top surface  10  of the tile  1 . This exposed portion  18  also includes a textured surface structured to closely represent the look and feel of an actual grout line. As will also be described subsequently herein with reference to  FIGS. 15 -A through  17 -B, when a plurality of the inventive tiles  1  are assembled and installed with their exposed portions  18  disposed in an operative orientation, they will collectively offer to a person standing close by or a few feet away (or more) a highly realistic appearance both in terms of the tile&#39;s similarity itself to a selected material such as real marble, stone, or ceramic, but importantly, also  1  in terms of the tiles  1  having the appearance of an actual grout line caused in large part by the depth of the exposed portion  18  and the width of the gap  14  relative to the top surface  10  of the tile  1 , as well as the textured surface of the exposed portion  18 . Moreover, the top layer  20  and/or core layer  30  may be manufactured to include a dye that may match or be representative a variety of grout colors so as to correspond with the intended coloring of the overall tile  1 . 
     As is also shown in  FIGS. 1-14 , the exposed portion  18  of the tile  1 , including the sidewall  15  associated therewith, can be seen to effectively define a gap  14 . The width W of the exposed portion  18 , and the gap  14  created thereby, will in the preferred embodiments be substantially uniform along a length of the side  14  of the tile, and may range from being nearly imperceptible, but still visible, to a width W of about 6 millimeters (about 0.236 inches), or more, depending on the desired look of the overall surface. The embodiment of  FIG. 6 , however, illustrates an exposed portion  18  having a width W of approximately 5 millimeters (about 0.197 inches). Additionally, the embodiment of  FIG. 6  illustrates a sidewall  15  that extends into the polyvinyl chloride (PVC) layer  40  of the top layer  20 , so that the exposed portion  18  is formed on or within the PVC layer  40  at a depth D of generally about 0.9 millimeters (about 0.035 inches) below the top surface  10  of the tile. However, the exposed portion  18  may be located at another depth, but preferably within a range of between generally about 0.9 millimeters (about 0.0354 inches) to about 2 millimeters (about 0.079 inches) from the top surface  10  of the tile  1 . This range should  1  be considered an approximation as during the production of the tile(s)  1 , variations, such as within 0.1 millimeters (about 0.004 inches), are likely, which may enhance the realistic appearance of the imitation grout line of the tile(s)  1 . 
     The aforesaid exposed portion  18  having a textured surface structured to represent the look and feel of an actual grout line is ideally achieved during the manufacturing process for the inventive tile  1 . More specifically, in the process of manufacturing the tile  1 , a tool such as a press and/or router or another instrument, such a cutting blade(s), a profiling knife, etc. may be applied to the tile  1 , such as to the top layer  20 , along at least one side or edge  16 . The press and/or router or other tool may be used to remove all or substantially all of the top layer  20  extending along a selected side  16  of the tile  1 , so as to expose a portion of the polyvinyl chloride (PVC) layer  40  and define the exposed portion  18  in outwardly extending relation to a selected side, such as  16 , of the tile  1 . In the preferred embodiments, the density of the polyvinyl chloride (PVC) layer  40  should be between generally about 2,000 kg/m3 (which is about 124.856 lb/ft3) to about 2,400 kg/m3 (which is about 149.827 lb/ft3), in order to permit the tool, cutting blade(s), knife or other instrument to cut into and profile the polyvinyl chloride (PVC) layer  40  to form the sidewall  15  and exposed portion  18 , and to create a texture surface thereon that ideally approximates that of fine sand. Additionally, this density range provides sufficient structural integrity to the polyvinyl chloride  1  (PVC) layer  40  so that it does not disintegrate, rupture, tear or otherwise incur damage during the cutting and profiling process. In an alternative embodiment, during the process of manufacturing the tile  1 , the tool or instrument used may remove more of the top layer  20  extending along a selected side  16  of the tile, so as to expose a deeper profile into at least a portion of the core layer  30  as well. 
     Also, in the preferred embodiments of the tile  1  as shown in  FIGS. 2-3, 6, 9, and 11-14 , the exposed portion  18  is formed on the polyvinyl chloride (PVC) layer  40 . As will become clear from the discussion below, during the manufacturing process, when a portion of the top surface  10  of the tile  1  is removed along one side, such as  16  thereof, preferably at a depth of between 0.9 millimeters (about 0.035 inches) to 2 millimeters (about 0.079 inches) below the plane of top surface  10 , at least a portion of the polyvinyl chloride (PVC) layer  40  will be exposed and formed to define the exposed portion  18 , including a sidewall  15  and a gap  14 . Alternatively, and as has been described relative to  FIGS. 4, 5 and 7 -B, the thickness of the polyvinyl chloride (PVC) layer  40  may be substantially reduced so as to facilitate exposing at least a portion of the core layer  30  to define the exposed portion  18  and gap  14  thereon. 
     In another embodiment of the inventive tile  1 , the top layer  20  may comprise yet a further additional layer for reasons which will now be described. More specifically, and in those embodiments wherein the top layer  20  includes a polyvinyl chloride  1  (PVC) layer  40  having a dye or colorant(s) and a decorative layer  60 , an additional layer, which may be in the form of a coating, may be connected to and disposed between the polyvinyl chloride (PVC) layer  40  and the decorative layer  60 . This additional layer may comprise a thin layer of raw polyvinyl chloride (PVC) material which is typically black in color, but in at least one other embodiment this additional layer may comprise a coating of material having a tonality that approximates a black color. The need in some embodiments for an additional layer arises because the decorative layer  60  is generally designed to be used with or against a dark background such that it can adequately reflect the desired tones of a selected color and/or overall designs appearing on the decorative layer  60 . Therefore, some embodiments of the inventive tile  1  may comprise yet an additional layer of PVC or a black coating applied to the polyvinyl chloride (PVC) layer  40  to serve as a dark background for the decorative layer  60 , which preferably has a tonality that approximates a black color or other dark background colors such as, but not limited to dark brown or dark grey. Also, the need for some embodiments of the tile  1  to include this additional layer or coating arises because during the formation of the polyvinyl chloride layer  40 , when the raw polyvinyl chloride (PVC) is mixed with a dye or colorant(s), higher concentrations of the dye or colorant may accumulate towards the bottom and top surfaces of the PVC layer  40 . 
     Accordingly, to help ensure that the color of the imitation grout line  1  being formed on the tile  1  on or as part of the polyvinyl chloride (PVC) layer  40  is substantially uniform, in the preferred embodiments no more than approximately 0.4 millimeters (about 0.016 inches) of material should be removed from the polyvinyl chloride (PVC) layer  40  itself, so as to create the exposed surface  18  at a desirable depth within the PVC layer where the dye or colorant(s) tend to accumulate. In at least one preferred embodiment, the depth of the material removed to create the exposed surface  18  in the PVC layer  40  will be less and generally only about 0.33 millimeters (about 0.013 inches) of material should be removed. In other words, because the dye or colorant(s) tend to accumulate at the upper and lower surfaces of the PVC layer  40 , an optimal depth in some embodiments at which the exposed portion  18  will be disposed or located will be generally between approximately 0.33 millimeters (about 0.013 inches) to approximately 0.4 millimeters (about 0.016 inches) below the top or fifth surface  52  of the polyvinyl chloride (PVC) layer  40 . This ensures that the exposed portion(s)  18  is formed on sections of the polyvinyl chloride (PVC) layer  40  that comprise an adequate or otherwise sufficient amount of dye or colorant. 
     With reference now to  FIGS. 6, 7 -A and  7 -B, the inventive tile  1  may additionally comprise an interconnecting mechanism formed on the sides  16  or  16 ′ of the tile  1 . For example, the interconnecting mechanism of the present invention may comprise a “tongue” side  70  formed on or along one side  16  of the tile  1 , and a “groove” side  80  formed on or along a different side  16 ′ of a different tile  1 . The “tongue” side  70  and the “groove” side  80  are configured so as to be joined together in mating engagement and facilitate both the installation and alignment of the tiles  1  during installation. Additionally, either the “tongue” side  70  and/or the “groove” side  80  may be formed on the tile  1  primarily as part of the core layer  30  as shown in  FIGS. 6-7 -B. The “tongue” side  70  and the “groove” side  80  may also be structured so as to permit slight movement and/or rotation between two adjacent tiles, which permits adjustment of one tile relative to another to accommodate uneven substrates, or a slab of concrete that is not perfectly level, as is often the case with unfinished floors and/or walls. As such, either the “tongue” side  70  or the “groove” side  80  may be formed at least partially within the top layer  20  as shown in  FIGS. 6-7 -A. 
     With reference now to  FIG. 6 , in a preferred embodiment the inventive tile  1  will have an exposed portion  18  formed on a side  16  thereof which corresponds to the “tongue” side  70  only, and not to the “groove” side  80 . In the embodiment of  FIG. 6 , the gap  14  defined by exposed portion  18  and sidewall  15  is also partially defined by the top layer  20  and edge  16 ′ of an adjacent tile  1  which includes the “groove” side  80 . Alternatively, as is shown in the embodiments of  FIGS. 7 -A and  7 -B, the “tongue” side  70  and the “groove” side  80  of the tile  1  may each be configured to include an exposed portion  18  having the textured surface that imitates the grout line. Other embodiments are also within the scope of the present invention wherein the exposed portion  18  may be formed on a tile  1  with a “groove” side  80 , and not on the “tongue” side  70 . Moreover, the tile  1  of the present invention may be cooperatively configured with different mechanical joining systems made by a variety of manufacturers. These mechanical joining systems may include a relatively new “click-lock” type of mechanical joining system used during installation of a variety of surfaces such as imitation flooring tiles. 
     With reference now  FIGS. 18-24 , in certain embodiments the inventive tile  1  can also be structured to facilitate installation, particularly on a vertical wall surface, but also on other surfaces including if desired, a ceiling. 
     For example, and with initial reference to  FIG. 18 , the inventive tile  1  in such embodiments may be provided with an elongated interconnecting mechanism  125  on or along at least one side thereof  16 . The elongated interconnecting mechanism  125  is structured and disposed to receive a portion of one connector there-through such as at  130 , or a plurality of connectors, to attach the tile  1  to an underlying surface, such as an unfinished drywall surface, and ideally in a manner that conceals the connector in the finished installation. Additionally, and with reference to  FIGS. 19 and 20 , in embodiments of the tile  1  having the elongated interconnecting mechanism  125 , the tile  1  will preferably also include, but does not have to include, a mating interconnecting mechanism  115  formed on or along an oppositely disposed side  116  thereof, for reasons which will become clear from the description subsequently herein, below. 
     Additionally, the inventive tile  1  having an elongated interconnecting mechanism  125  will, in most embodiments but not necessarily in all embodiments, include an exposed portion  18  structured to imitate the look and feel of a real grout line. As has been described previously herein, the exposed portion  18  which provides a realistic looking grout line may be formed along at least one side of the tile  1 , such as at  116 , as shown in  FIGS. 18 and 21 . In such embodiments, the exposed portion  18  may be formed in a top section of the tile  1 , such as a polyvinyl chloride (PVC) layer  40  in the manner described previously herein. Alternatively, and with reference to the embodiments of  FIGS. 19 and 20 , the inventive tile  1  having an elongated interconnecting mechanism  125  may also be provided without an exposed portion(s)  18 . 
     In other embodiments, the inventive tile  1  having an elongated interconnecting mechanism  125  may also comprise one or more sub-layers that serve as an underlayment or sublayer such as for sound attenuation. Such sublayer(s), may be made from materials suitable for this purpose, including but not limited to cork, laminate foil, a thin layer of foam, or ethyl vinyl acetate (EVA), and may be connected to or otherwise adhesively joined to a bottom surface of the core layer  30  of the tile  1 . 
     Referring now to  FIGS. 19 and 20 , in one embodiment the inventive tile  1  includes an elongated interconnecting mechanism  125  that comprises a lower extended segment  120  formed on at least part of one side  16  of the tile  1 . Preferably, however, the elongated interconnecting mechanism is formed along substantially all, and ideally along all of the side  16  of the tile  1 , and further, so as to have a substantially uniform configuration. As shown in  FIGS. 19 and 20 , the lower extended segment  120  extends outwardly and beyond an upper edge  22 ′ associated with the top surface  10  of the tile  1 . As perhaps best illustrated in  FIG. 20 , the lower extended segment  120  itself may comprise a top portion  122  and a bottom portion  124  and, while the particular configuration of the lower extended segment  120  may vary, it will preferably extend outwardly from and coplanar with the top surface of the tile  1  at a distance D of generally about 11 millimeters (about 0.433 inches). While this distance D can also vary, it will preferably be in a range of between about 8 millimeters (about 0.315 inches) to generally 13 millimeters (about 0.512 inches). Also, this distance D, which may be considered the width dimension of the lower extended segment  120 , is sized, dimensioned and configured to provide sufficient space or physical room for receiving a one or more connectors, disposed in an operative position on or along the length of side  16  of the tile  1 , used during installation to secure the tile  1  to an underlying surface or substrate, such as a wall or a ceiling. 
     Additionally, in the illustrated embodiment of  FIGS. 19 and 20 , the lower extended segment  120  is formed on or from the core layer  30  of the tile  1 . For example, during manufacture of the tile  1 , the lower extended segment  120  may be formed by removing sufficient material from the layer(s) of the tile  1  above the core layer  30 , such as the top section  20  of the tile  1 , which as described previously herein may have one or more layers, to reveal the top portion  122  of the lower extended segment  120  and to define the lower extended segment  120  at a desirable distance below the upper edge  22 ′ associated with the top surface of the tile  1 . As an alternative, one or more layer(s) of the tile&#39;s  1  top section  20  may be disposed in an offset relation to the core layer  30 , to define the lower extended segment  120 , as illustrated in  FIG. 21 . It should be appreciated that in other embodiments, however, the lower extended segment  120  could alternatively be formed on a polyvinyl chloride (PVC)  40  layer of the tile  1  associated with the top section  20 , rather than being formed on the core layer  30 . 
     As also shown in the illustrated embodiment of  FIGS. 19 and 20 , the lower extended segment  120  may comprise a lateral portion  126 , in addition to a top portion  122  and a bottom portion  124 . As such, an overlapping portion  128  is also formed on the tile  1  in this illustrated embodiment, and defines a lip extending along the side  16  of the tile  1  that serves to partially define the lower extended segment  120  as a channel that also extends along the side  16  of the tile  1 . As will become clear from the description subsequently herein, this embodiment having the lower extended segment  120  comprised of a channel facilitates installation of the tile  1  and further, operates to reduce or eliminate shifting or displacement of the tile  1 , following installation of the tile  1  on a vertical surface such as a wall in particular. In the illustrated embodiment of  FIGS. 19 and 20 , as well as in  FIG. 21 , the overlapping portion  128  is formed by or within the top section  20  of the tile, and as also shown, is disposed in an offset relation relative to the core layer  30  of the tile  1 , from which the bottom portion  124  and lateral portion  126  of the lower extending segment  120  are formed. Also in the illustrated embodiment of  FIGS. 19 and 20 , the width of the overlapping portion  128  will preferably be about 3 millimeters (about 0.118 inches), but in other embodiments could be quite small at about 1 millimeter (about 0.039 inches) or alternatively, larger to a width of about 5 millimeter (about 0.197 inches). In addition, the height of the lateral portion  126  may be in a range from anywhere of about 1.5 millimeters (0.059 inches) to about 2.0 millimeters (0.079 inches). It should be appreciated that these dimensions are approximated for the illustrated embodiment, and can be varied while still yielding a tile that is within the spirit and scope of the invention. 
     As also shown in  FIGS. 18 and 19 , the intended location of a connector on the elongated interconnecting mechanism  125  is indicated in phantom lines at  130 . In this embodiment, three connector locations  130  are illustrated on the lower extended segment  120  of the tile  1  although it should be appreciated that the number of connectors can be more depending on the length of the particular tile  1 , or in some cases, less. The type of connector received on the lower extended segment  120  of the tile  1  can also vary, and may include flat-head screws, bolts, “Tapcon” concrete screws, or other types of screws, fasteners, and the like. One of these connectors may be drilled, screwed, or otherwise driven directly into one of the intended locations  130  on the lower extended segment  120  of the tile  1 , and into the underlying substrate. By way of example, in drywall applications, installation of the tile  1  will typically involve at least two connectors, such as two flat-head screws, to secure the tile  1 , which will preferably occur at the location of a support stud for the drywall or closely adjacent thereto. An additional connector may be installed on the tile  1  and fastened to the drywall that is not at an approximate location of a drywall stud. It is worth pointing out that if such flat-head screws are used to secure the tile  1  to a drywall surface, they will ideally be driven through the lower extended segment  120  and into the underlying surface behind the tile  1 , so that the flat-head portion thereof is substantially aligned or flush with the top portion  122  of the lower extended segment  120 . For various reasons, it is preferable that the head of the connector be in such substantial alignment, including so as to only minimally interfere with, if at all, the movement of the upper extended segment  110  into sliding engagement with the lower extended segment  120 . 
     Additionally, and as previously mentioned herein, the inventive tile  1  may have a core layer  30  formed to have an optimal density in a lower range than other embodiments disclosed herein. As an example, when the inventive tile  1  is used as wall panel, the core layer  30  may have a density in a range from about 500 kg/m3 (about 31.214 lb/ft3) to about 900 kg/m3 (about 56.185 lb/ft3). By providing the inventive tile  1  with a core layer  30  having a lower density, it results in a rigid, yet lighter, softer and somewhat more flexible tile  1 , compared to other embodiments disclosed herein having higher density ranges for the core layer  30 . This is advantageous, particularly for use on wall surfaces, because a lighter tile  1  is less likely to cause bowing of or to otherwise distort the underlying surface. Additionally, when the inventive tile  1  is being applied to a wall, there should be no load from foot traffic, furniture, etc., and consequently a higher density and level if rigidity associated therewith is not strictly needed. Moreover, when the inventive tile  1  comprises an elongated interconnecting mechanism for use with a connector, the lower density of the core layer  30  more readily receives the connector(s) without incurring damage. Conversely, a tile  1  with a higher density of the core layer  30  is likely to be more susceptible to damage when a connector is installed through the core layer  30 . 
     In one alternative embodiment of the present invention, a tile(s)  1  may be provided with pre-drilled holes at the intended locations  130  of the connector(s). The predrilled holed may even be, if desired, dimensioned to correspond to the size of the connector(s). 
     Still referring to  FIGS. 19 and 20 , and as noted previously herein, the tile  1  including an elongated interconnecting mechanism  125  along one side  16 , will preferably also include a mating interconnecting mechanism  115  formed on and ideally along an oppositely disposed side  116  thereof, or also an adjacent side, which will also have a substantially uniform configuration. In the illustrated embodiment of  FIGS. 19 and 20 , the mating interconnecting mechanism  115  comprises an upper extended segment  110  having a top portion  112  and a bottom portion  114 . However, the bottom portion  114  is illustrated as having a width dimension W that is larger or wider than that of the top portion  112 . As a non-limiting example, the bottom portion  114  of the upper extended segment  110  may have a width dimension W that is generally about 13 millimeters, although this could be anywhere in a range from about 10 millimeters to about 15 millimeters. In contrast, the top portion  112  may comprise a much smaller width dimension of about 3 millimeters (about 0.118 inches), although this could be anywhere in a range from about only 1 millimeter (about 0.039 inches) to about 5 millimeters (about 0.197 inches). It should again be appreciated that these dimensions are approximated for the illustrated embodiment, and can be varied while still yielding a tile that is within the spirit and scope of the invention. 
     With reference now to  FIG. 22 , a pair of tiles  1 A and  1 B are illustrated in an embodiment according to the present invention, and shown in an assembled state, with the edges  16  and  116  of the tiles matingly joined together. More specifically, the elongated interconnecting mechanism  125  on a first tile  1 A is illustrated as being joined to the mating interconnecting mechanism  115  on a second tile  1 B. As represented in  FIG. 22 , when these two tiles  1 A and  1 B are connected, the lower extended segment  120  faces and/or abuttingly engages with the upper extended segment  110 . Additionally, a distal section of the upper extended segment  110  of the tile  1 B is matingly received within the channel defined by the overlapping portion  128  and the lower extended segment  120  on the adjacent tile  1 A. As stated previously herein, this mating interconnection is operative to reduce or eliminate shifting or displacement of the tile  1 B during and after installation. 
     Still referring to  FIG. 22 , the illustrated embodiment of tile  1 B is shown to include a mating interconnecting mechanism  115  that is structured and disposed to be slidably inserted into the elongated interconnecting mechanism  125  of tile  1 A. More specifically, the upper extended segment  110  of mating interconnecting mechanism  115  is formed to be slidably moved on the lower extended segment  120  of tile  1 A into a position, as shown, with its distal end inserted into the channel defined by the overlapping portion  128 , top portion  122  and lateral portion  126  thereof. Accordingly, the bottom portion  114  of the upper extended segment  110  is structured so as to be capable of sliding with respect to the top portion  122  of the lower extended segment  120 , such that, and as represented in  FIG. 22 , when the two tiles  1 A and  1 B are connected, the top portion  122  of the lower extended segment  120  of tile  1 A faces and abutingly engages the bottom portion  114  of the upper extended segment  110  of tile  1 B. In the illustrated embodiment, and as shown in  FIG. 20 , this is accomplished by the upper extended segment  110  having a width dimension W that is slightly larger than the dimension D of the lower extended segment  120 . 
     Consequently, and in the illustrated embodiment shown in  FIG. 22 , a recess, indicated as  140 , may be formed in the space between the edges  16  and  116  of the joined tiles  1 B and  1 A. More specifically, the recess  140  may comprise a small gap formed between the proximal end  118  of the upper extended segment  120  on tile  1 B, and the outer lower edge  16 ′ of the adjacent tile  1 A corresponding to the lower extended segment  120 . The recess  140  facilitates installation of tile  1 B relative to tile  1 A and also allows for dimensional adjustments between them after installation. That is, even after the upper extended segment  110  of tile  1 B has been inserted into the elongated interconnecting mechanism  125  of tile  1 A, the recess  140  allows for some micro dimensional adjustments during installation, such as by allowing the upper extended segment  110  to slide slightly relative to the lower extended segment  120 . It is pointed out, however, that while a recess  140  has been described and illustrated herein for achieving the slidable insertion of one tile, such as  1 B having a mating interconnecting mechanism  115  into another tile, such as  1 A having an elongated interconnecting mechanism  125 , it would also be within the spirit and scope of the present invention to utilize other structures for achieving this purpose, or even to reverse the configuration of the structures described herein. 
     As briefly described above, the illustrated embodiment in  FIG. 22  which depicts two tiles  1 A and  1 B, each having a mating interconnecting mechanism  115  and an elongated interconnecting mechanism  125 , allows for an easy and efficient installation of a plurality of such tiles onto a surface such as a wall, as is generally reflected in  FIGS. 23 and 24 . More specifically, a tile such as  1 A may be positioned first on a wall surface in a desired location with the elongated interconnecting mechanism  125  exposed. To assist with ascertaining a desired location for the tile  1 A, guide lines may be pre-marked on the wall or other surface to indicate the intended location(s) where the tiles  1 A,  1 B, and/or the sides  16 ′ thereof should be aligned, as shown at  160  in  FIG. 24 . Once a desired location is determined, the first tile  1 A may be positioned on the wall surface and oriented with the elongated interconnecting mechanism  125  disposed in an upwardly facing orientation, as shown in  FIG. 23 . The lateral side(s)  16 ′ of the tile  1 A may be substantially aligned with a structure on the wall surface, whether a corner, a door, a window, etc., such as shown at an initial position  170  in  FIG. 24 . One or more connectors can then be drilled into the exposed lower extended segment  120  at locations such as  130 , shown in at least  FIGS. 18-19  and  23 - 24 , to attach the tile lA to the wall surface. The connector(s) are ideally driven far enough through the lower extended segment  120  and into the wall surface so that the head portion of the connector is in close alignment with the lower extended segment  120 , and the top portion  122  thereof in particular. 
     Thereafter, a second tile, such as  1 B may then be relatively easily assembled into place adjacent the first tile  1 A, with the mating interconnecting mechanism  115  generally aligned with the elongated interconnecting mechanism  125 , and then slidably moved into mating engagement in the direction of arrow Y shown in  FIG. 23 . As has been described previously herein, the mating engagement between tiles  1 A and  1 B may be defined by the upper extended segment  110  on tile  1 B being slidably moved on the lower extended segment  120  of tile  1 A and into position with its distal end inserted into the channel defined by the overlapping portion  128 , top portion  122  and lateral portion  126  thereof, as shown in  FIG. 22 . In the preferred embodiments, once tile  1 B has been positioned to be matingly joined with tile  1 A, the elongated interconnecting mechanism  125  associated with tile  1 B on an opposite edge thereof, will be now be exposed, also ideally in an upwardly facing orientation, as best shown in  FIG. 23 . Consequently, one or more connectors can then be drilled into the exposed lower extended segment  120  of tile  1 B, as described, followed by the introduction of a third tile having the mating interconnecting mechanism  115  formed thereon for being matingly joined with the elongated interconnecting mechanism  125  of tile  1 B. This process may be repeated as many times as needed to complete an installation of the tiles  1  on a surface. 
     Additionally, once a plurality of tiles such as  1 A and  1 B in  FIG. 23  have been assembled and installed, the upper extended segment  110  of a tile  1 B serves to conceal the one or more connectors, as well as the lower extended segment  120  through which they pass, to attach the tile to the wall or other surface. 
     As an alternative, one or more tiles  1  according to the present invention may be glued directly onto the underlying surface, whether a wall, floor, ceiling, etc. 
     With reference now to  FIG. 21 , the illustrated embodiment of the tile  1  additionally includes an exposed portion  18  that closely imitates the look and feel of a real grout line. As shown, the exposed portion  18  is formed on a side  116  of the tile  1  corresponding to the mating interconnecting mechanism, and upper extended segment  110  so that the imitation but realistic looking grout line will still be visible in the final installation. 
     With reference now to  FIG. 24 , a plurality of the inventive tiles  1  described herein are shown, each as having a substantially rectangular configuration, and in an offset pattern or “staggered” relationship to one another. For example, in  FIG. 24 , three tiles, marked as  1 ,  2 , and  5 , each comprise a substantially equivalent length, whereas tiles marked as  3  and  4  may comprise a different, reduced length and/or may be cut or otherwise modified during the installation process. One or more connectors may be installed at intended locations  130  on the lower extended segment of the tile  1 , some of which should be in alignment with the location  150 ′ of a supporting drywall stud  150 , with the approximate locations  150 ′ of the supporting drywall studs  150  being represented with broken lines. Once the first tile  1  is secured in an initial position, such as  170  in  FIG. 24 , a second tile  2  may be inserted or slid into a side  16 ′ of the first tile  1 . Subsequently, further connectors may be installed on the tile  2  at intended locations  130  on the lower extended segment thereof  120  to secure it to the drywall. Thereafter, another tile  4  may be positioned on top of tile  1  and its upper extended segment  110  slidably inserted into the lower extended segment of tile  1 , to begin creating a second row  180  of tiles. As also shown in  FIG. 24 , a tile  4  may be inserted into tile  1 , and tile  5  may be inserted into a portion of tile  1  and into a portion of tile  2  to create a substantially offset pattern. Additional rows of tiles  1  may be installed above to substantially cover the intended surface. Installation does not necessarily have be done from right to left, as it may also be done from left to right. 
     The production process for the inventive tile  1  can vary, but generally comprises different production sequences. For example, the core layer  30  may be produced by mixing together the raw materials, such as a PVC material, calcium powder and foaming agent, and any accessory materials, and applying heat to melt the mixture. The melted materials may be then placed into an extrusion machine that molds the melted material into boards. At this stage, foaming material may be added to facilitate production and thereafter, a resting or curing stage for roughly 24 to 36 hours. The production process for the top layer  20  also comprises mixing together the raw materials, such as a PVC material, calcium powder, oil and a foaming agent, and any accessory materials, and applying heat to the mixture to melt it. Then the melted materials may be pressed over one or more pressing stages to form vinyl pieces, which at this point, are likely to include a textured surface. Thereafter, the vinyl pieces, which essentially form the top layer  20 , may be pressed with a decorative layer  60 , such as a thin film sheet of polyvinyl chloride (PVC). A UV coating may later be added to the top surface  10 . 
     After production of the top layer  20  and the core layer  30 , individual sheets of both may be adhesively joined or glued together to form the desired tile(s)  1  as shown for example, in  FIGS. 8-11 . After application of the glue or other adhesive(s), the assembled layers are pressed, for example, by a cold pressure machine in a thermostatic chamber for about 6 hours to about 8 hours. After pressing, the assembled layers may be left in the thermostatic chamber for about 36 hours to about 48 hours to rest or cure. Thereafter, the assembled layers or master-boards may be cut into smaller sizes. The master-boards generally have a dimension of about 2 meters to about 3 meters, but may have different dimensions. After the assembled layers or master-boards are cut into smaller sizes, each individual piece may be passed through a machine that gives one or more sides  16  or  16 ′ of a tile an individual profile. This profile may include forming modifying, roughening or otherwise cutting the sides  16  or  16 ′ of the assembled tiles  1 . At this stage, either or both of the exposed surface  18 , having the imitation grout line, or the interconnecting mechanism may be formed. Thereafter, the tile(s)  1  may be packaged for shipment. 
     As previously mentioned, the tile  1  of the present invention can be configured to imitate the feel or texture of a real material such as real stone, marble, ceramic, wood, or another material. Accordingly, during the pressing stage a customized texture may be given to the wear layer  50  of the tiles  1 . A computer may be used to configure a press according to a decorative design, such as a visual design of the decorative layer  60 , so that the press gives the wear layer  50  a corresponding texture. More specifically, a picture of the intended decorative design may be inputted into a computer so as to program the press accordingly. 
     For use as a flooring application, a plurality of the inventive tiles  1  will be disposed next to each other in an operative orientation. As such, a side of one tile  1  will be disposed next to the side of a different tile  1 . As mentioned previously, the exposed portion  18  of the inventive tile  1 , and the gap  14  defined thereby, may have varying dimensions. Also, and with reference now to  FIG. 15 -A, in one embodiment of the tile  1  having a rectangular configuration, each of the four sides  16  may have an exposed portion  18  and a textured surface formed thereon. In such an embodiment, the exposed portion  18  and textured surface formed on each side  16  may be sized to equal generally one half (½) of the overall, intended resulting size of the imitation grout line formed between tiles, as illustrated in  FIG. 15 -B. For example, the width of the exposed portion  18  and textured surface may be generally about 2.5 millimeters (about 0.098 inches) to about 3 millimeters (about 0.118 inches). As such, an entire simulated grout line comprising the exposed portion  18  and texture surface thereon may be formed between two adjacent tiles and have a width of generally about or between 5 millimeters (about 0.197 inches) and 6 millimeters (about 0.236 inches). 
     In an alternative embodiment, and with reference now to  FIGS. 16 -A and  17 -A, an inventive tile  1  may have an exposed portion  18  and textured surface formed on only two sides  16  thereof, each of which is sized to equal generally all or substantially all of the grout line formed between tiles. That is, and as shown in  FIGS. 16 -A and  17 -A, a tile  1  may have two sides  16  that each include an exposed portion  18  and a textured surface formed thereon, and two sides  16 ′ that do not. For example, and as is perhaps best shown in  FIG. 16 -B, each side(s)  16  of the tile  1  having an exposed portion  18  may be disposed next to a side  16 ′ of a tile  1  that does not have such structure. In this embodiment, the exposed portion  18  and textured surface may be sized to have a width of generally about or between 5 millimeters (about 0.197 inches) to 6 millimeters (about 0.236 inches). When two or more of such tiles  1  shown in  FIG. 16 -A or  17 -A are disposed next to each other, as shown in  FIG. 16 -B and  17 -B respectively, the visual effect that results is a full imitation grout line formed around all sides of each tile. However, other combinations of the size and location of the exposed portion  18  are also possible. 
     With reference now to  FIG. 25 , an additional feature of the present invention comprises forming the exposed portion  18  at a middle or central section  28  of the tile  1 , in addition to, or instead of, one of its side(s)  16 . More specifically, it is often desirable to provide a surface, such as a wall or a floor surface, with a visual appearance of several tiles  1  being disposed in an even arrangement, wherein the four corners of four different but adjacently disposed tiles meet at a common point, as can be appreciated by the arrangement of tiles in  FIG. 25 . From an installation and durability perspective, there are disadvantages associated with the even arrangement of tiles as this common point is often weak and makes the tiles  1  susceptible to damage. The present invention addresses this disadvantage by providing a substantially rectangular tile  1  that imitates the appearance of two different substantially square tiles  1 , and in some embodiments more than two square tiles. 
     More specifically, and as shown in  FIG. 25 , each one of tiles labeled as TILE  1 , TILE  2 , TILE  3 , TILE  4  and TILE  5  has a substantially rectangular shape, with a length that is approximately twice their individual width, such as a length of 24 inches by a width of 12 inches. Furthermore, each one of these TILES  1 - 5  preferably comprises an exposed portion  18  formed along one or more its sides  16  to closely imitate the look and feel of a real grout line, as described previously herein. However, the inventive tiles shown in  FIG. 25  each includes another exposed portion, namely, a middle exposed portion, indicated as  18 ′ formed substantially across a middle portion  28  of the tile&#39;s visible top surface  10 , which is also structured to closely imitate the look and feel of a real grout line, as described previously herein. As illustrated, the middle exposed portion  18 ′ is disposed within a middle or central portion  28  of the TILE  1 , and may extend completely across the top surface  10  thereof between opposite side(s)  16  of the TILE  1 . For purposes of clarity, the middle exposed portion  18 ′ may be formed on the tile  1  in the in a manner similar to embodiments previously described herein, such as being formed in the polyvinyl chloride (PVC) layer  40  at a depth below the top surface  22  of the tile  1 . In other embodiments, the middle exposed portion  18 ′ may be formed in the core layer  30 . 
     However, and as illustrated in  FIG. 25 , when a plurality of such substantially rectangular tiles, such as those labeled TILE  1 , TILE  2 , TILE  3 , TILE  4  and TILE  5 , are installed next to each other in an offset manner, so as to form a “staggered arrangement” similar to that shown in  FIG. 24 , the resulting appearance will be that of an even arrangement or several squares as shown in  FIG. 25 . For illustrative purposes, each one of the substantially rectangular TILES  1 - 5  has a first portion labeled as “A,” and a second portion labeled as “B,” such as “ 1 A” and “ 1 B in TILE  1 ,” “ 2 A” and “ 2 B” in TILE  2 , etc. Each portion, “A” and “B” of each TILE  1 - 5  is intended to create the visual impression of being one individual tile having a substantially square shape. Said differently, each substantially rectangular TILE  1 - 5  is intended to provide a visual appearance of two substantially square tiles. A staggered arrangement may thus be created by disposing the portion “B” of one tile next to the portion “A” of a different tile. This may be done in a “horizontal” manner, such as disposing portion “ 2 A” right next to portion “ 1 B”. This may also be done in a “vertical” manner such as disposing portion “ 3 A” directly below portion “ 1 B,” and portion “ 4 A” below portion  5 B″. This arrangement may be repeated so that the exposed portion  18  of one side(s)  16  of a tile offering a realistic looking grout line is disposed in alignment with the middle exposed portion  18 ′ of a different tile, which also includes a realistic looking grout line. 
     For example, and still referring to  FIG. 25 , the exposed portion  18  of the left side  16  of TILE  3 , namely, that marked with tile portion “ 3 A,” may be disposed in alignment with the middle exposed portion  18 ′ of TILE  1 , and more specifically, with the middle exposed portion  18 ′ formed across TILE  1  between portions “ 1 A” and “ 1 B”. Also by way of example, the exposed portion  18  formed on the right side  16  of TILE  3 , namely, that marked with tile portion “ 3 B,” may be disposed in alignment with the exposed portion  18  formed on the left side  16  of TILE  4 , namely, that marked as “ 4 A,” such that both of these exposed portions  18  are disposed in substantially parallel alignment with each other, and also in alignment with the middle exposed portions  18 ′ of TILE  2  immediately above, namely, that marked between “ 2 A” and “ 2 B”, and also in alignment with the exposed portion  18 ′ of TILE  5  immediately below, namely, that marked between “ 5 A” and “ 5 B”. 
     As may be appreciated from  FIG. 25 , the visual result offered by the offset or staggered arrangement of the substantially rectangular TILES  1  through  5 , each of which has the middle exposed portion  18 ′ formed thereon, is a substantially even arrangement appearing to be several square tiles arranged with a common point between the four corners of four different but adjacently disposed tiles. The actual physical arrangement formed by TILES  1  through  5 , however, while achieving this visual result, includes an actual common point between only two corners of two different but adjacently disposed tiles. As a result, the weakness associated with the common points, where four different corners of four different tiles are adjacent to each other, is minimized, and the chance of tiles being damaged at such common points is greatly reduced. 
     Moreover, this benefit offered by the present invention can be significantly increased. Specifically, while the size of the substantially rectangular tiles shown in  FIG. 25  are likely to be offered in a common rectangular shape of 12 inches in width by 24 inches in length, this can be increased to a much larger size, such as 12 inches by 48 inches in length, with each such larger tile formed to have additional middle exposed portions  18 ′ across the middle and other sections thereof, so that when arranged with other such tiles in an offset or staggered arrangement, the visual result will still offer an appearance of evenly arranged tiles, similar to several aligned square tiles forming a grid. However, the common points between four actual corners of four adjacently disposed tiles will be minimized. It should be appreciated, of course, that other dimensions and/or configurations of the inventive tile shown in  FIG. 25  are also within the scope of the present invention. 
     With reference back now to  FIGS. 12-14 , the tile  1  of the present invention may also comprise a bevel  90  formed on one or more side(s)  16  of the tile  1  adjacent to the exposed portion  18  and gap  14 . The bevel  90  may be formed on the sidewall  15  associated with the exposed portion  18 , at an upper portion thereof so as to be formed on the top layer  20 , and specifically on the wear layer  50 . The bevel  90  comprises a slanted portion that slopes downwardly, away from the top surface  10  of the tile  1  and towards the sidewall  15  that at least partially defining the exposed portion  18 . Preferably, the bevel  90  is formed to extend uniformly and coincident with sidewall  15 , exposed portion  18  and gap  14  along all or substantially all of one the side(s)  16  of the tile  1 . Additionally, the bevel  90  may comprise a variety of sizes and angles of inclination with respect to the top surface  10  of the tile  1 . For example, the bevel may have an angle of inclination that can range from generally about thirty degrees (30°) to about ninety degrees (90°). The illustrative embodiment of  FIG. 12  shows a bevel  90  having an angle of inclination of generally thirty degrees (30°). In an alternative embodiment shown in  FIG. 13 , the bevel  90  may instead comprise a two stage descent from the top surface  10  to the sidewall  15  defining exposed portion  18  and gap  14  of the tile  1 . With reference to  FIG. 14 , the bevel  90  may alternatively comprise a “micro” bevel  90 ′. As another example, and as shown in  FIG. 13 , the bevel  90  may additionally be formed on the exposed portion  18  itself, and may correspond with either the core layer  30  and/or the polyvinyl chloride (PVC)  40  layer instead of the top layer  20 . In such cases, the bevel  90  may have a slanted portion with an angle of inclination of generally about ten degrees (10°). 
     With reference now to  FIGS. 26-28 , yet additional features of the present invention can include providing a tile  200  with a core layer  230  comprised of a material different from previous embodiments described herein. For example, the inventive tile  200  may also be formed so as to include a material such as stone plastic composite (SPC), which may also referred to at times as a stone polymer composite (SPC). Stone plastic composite (SPC) is generally a mixture of materials that includes densified foam polyvinyl chloride (PVC) and stone dust, or an equivalent material, and will typically be about two times the weight (or more) of the core layer  30  described previously herein as a densified foam material, and is also sometimes referred to as “rigid board.” Such alternative embodiments using SPC material to form the core layer  230  are likely to prove advantageous because the properties of an SPC material include being more resistant to expansion and/or contraction. More specifically, the expansion coefficient of a stone plastic composite (SPC) is lower than that of other materials used in flooring applications, and therefore, stone plastic composite (SPC) material reduces the possibility that the overall tile  200  will flex, bend, or otherwise expand in ambient conditions. Using a stone plastic composite (SPC) material may also result in reduced or no dimensional shifting that might otherwise occur between individual tile(s)  200  after installation. 
     Accordingly, and in one or more additional embodiments, the core layer  230  of the present inventive tile  200  comprises a stone plastic composite (SPC) material structured to provide additional rigidity and sufficient support for a top section  220  of the inventive tile  200 , so that the resulting tile  200  is especially suitable for flooring applications. For example, in one or more of such embodiments, the core layer  230  comprises a stone plastic composite (SPC) material having an optimal density in a preferred range from anywhere of about 1,500 kg/m3 (about 93.642 lb/ft3) to about 2,000 kg/m3 (about 124.856 lb/ft3). In at least one preferred embodiment, however, the core layer  230  comprising a stone plastic composite (SPC) material will have a density that is generally between 1,900 kg/m3 (about 118.613 lb/ft3) to about 2,000 kg/m3 (about 124.856 lb/ft3). Additionally, in one or more embodiments, such as shown in  FIG. 27 , the top section  220  of the tile  200  may comprise a polyvinyl chloride (PVC) layer  240 , although as described subsequently herein, given the properties of a core layer  230  that includes SPC, this is not necessary and a top section  220  formed of different materials is also possible. 
     Indeed, and as previously stated, the top section  220  may comprise a veneer layer or layer of other material, including a coating of material, which may be referred to as (but not limited to) an enamel coating  521 . This coating of material may comprise an acrylic and/or a polycrylic coating that is initially in liquid form and applied directly onto the core layer  530  via spraying procedures or other similar processes. Such an enamel coating may be comprised of a colored appearance, or may be clear, and may be applied through spraying processes or other means similarly situated to apply a topical liquid enamel coating directly onto the core layer  230 . This coating of material may comprise an acrylic and/or polycrylic coating, a polyurethane coating, and/or an ethoxyline resin which may be configured to seal any cracks or gaps inherent in the core layer due to the chemical composition thereof. More specifically, because the core layer of at least one embodiment of the present invention may have a naturally porosity associated therewith, such an enamel coating may be configured as a fill coating in order to seep into such porous surface and create a smooth surface upon which design element(s) may be printed. 
     For instance, as previously stated, such an enamel coating may be configured for the application of at least one design element thereon. Such at least one design element may itself comprise, for instance, texture, grooves, impressions, undulations, color or graphical designs, or any other feature now known or hereafter developed. In at least one embodiment of the present invention, such design element(s) may be configured to imitate the texture and appearance of a real materials, such as genuine stone, marble, or wood. However, other appearances of such design element are envisioned herein. Such at least one design element may be applied onto the enamel coating of the top section  220  of the tile of at least one embodiment of the present invention via, for instance, printing processes.As shown in  FIG. 28 , in one or more embodiments, the top section  220  of the tile  200  may comprise a wear layer  250  and a decorative layer  260 . A lower surface  254  of the wear layer  250  may be joined to a top surface  262  of the decorative layer  260 . A top surface  252  of the wear layer  250  may be substantially coincident with the top surface of the tile  200 . Thus, in  FIG. 28  the top section  220  comprises a wear layer  250  and a decorative layer  260 , but not a polyvinyl chloride (PVC) layer  240 , joined directly to the core layer  230 . More specifically, a lower surface  264  of the decorative layer  260  may be joined directly to the core layer  230  comprising a stone plastic composite (SPC) material. The wear layer  250  and/or the decorative layer  260  may comprise a relatively thin film or sheet formed from polyvinyl chloride (PVC), although it is possible that other materials may be utilized. In embodiments wherein the tile  200  includes both a core layer  230  comprising stone plastic composite (SPC) material and a polyvinyl chloride (PVC) layer  240 , the density of the core layer  230  will preferably be greater than the density of the PVC layer  240 . 
     In one or more of the embodiments wherein tile  200  has a core layer  230  comprising a stone plastic composite (SPC) material and a wear layer  250 , the thickness of the wear layer  250  may be in a range from about 0.1 millimeters (about 0.004 inches) to about 0.7 millimeters (about 0.028 millimeters), and in some embodiments a thickness of about 0.3 millimeters (0.012 inches) to about 0.5 millimeters (0.020 inches). Additionally, a polyurethane (PU) coating may be applied to one or more layers to at least partially reduce scratching of a layer(s) below. 
     Additionally, in one or more embodiments wherein the core layer  230  comprises a stone plastic composite (SPC) material, the thickness of the tile  200  or portions thereof may be reduced. For example, the core layer  230  may have a thickness in a range from anywhere of about 3 millimeters (about 0.118 inches) to about 8 millimeters (about 0.315 inches), which together with the density of the core layer  230 , is likely to reduce the chances that the tile  200  will crack due to heavy foot traffic. In one preferred embodiment, the thickness of the core layer  230  will be reduced to approximately 4 millimeters (about 0.157 inches). As an additional non-limiting example, the overall thickness of the tile  200  having a core layer  230  comprised at least in part of stone plastic composite (SPC) and including a top section  220  may be about 5 millimeters (about 0.197 inches). As yet another non-limiting example, when a tile  200  having a core layer  230  comprised at least in part of stone plastic composite (SPC) includes a top section  220  including a PVC layer  240 , the latter may have a thickness of about 1 millimeter (0.039 inches) to about 2 millimeters (0.079 inches). 
     Also, there can be other embodiments wherein the inventive tile  200  comprises a core layer  230  that is at least partially made from a stone plastic composite (SPC) material, and wherein the top section  220  is manufactured so as not to include a polyvinyl chloride (PVC) layer  240 . For example, in one embodiment, a tile  200  according to the present invention may be provided with a core layer  230  comprising a stone plastic composite (SPC) material, and a relatively thin veneer layer  220 . The veneer layer  220 , which may comprise a “raw” veneer formed from a variety of materials, will preferably comprise one or more layers of natural stone or of genuine wood. In such embodiments, the thickness of the veneer layer  220  may now be produced to be very thin, such as within a range from anywhere of about 0.3 millimeters (about 0.012 inches) to about 1 millimeter (about 0.039 inches). In one preferred embodiment, the thickness of the veneer layer  220  is about 0.6 millimeters (about 0.024 inches) as in initial testing for durability, favorable results have been observed. In at least one embodiment, a liquid vinyl compound may be applied to the veneer layer  220  for additional wear and/or moisture resistance. As previously stated, such a veneer layer  220  may instead comprise another material or even a coating of material, which may be referred to but is not limited to an enamel coating, such as a fill coat or some other acrylic and/or poylcrylic coating applied directly onto the core layer. Likewise, as previously stated, at least one embodiment of the present invention may further comprise the application of a shielding layer onto the veneer layer  220  and/or enamel coating. Accordingly, it may be understood such a shielding layer may comprise the aforementioned liquid vinyl compound applied onto the veneer layer  220  for wear and/or moisture resistance. 
     With regard to the material composition of the core layer  230  comprising a stone plastic composite (SPC) material, while there may be various formulations, in at least one embodiment this comprises a combination of stone dust, a synthetic plastic polymer such as polyvinyl chloride (PVC), calcium powder, and a chemical agent. In a preferred embodiment, the stone plastic composite (SPC) material of the core layer  230  comprises polyvinyl chloride (PVC) in an amount of generally between about 20% to about 30%, calcium powder or stone dust in an amount of generally between about 70% to about 80%, and a chemical agent, in an amount of generally between about 0.5% to about 5%. In at least one embodiment the chemical agent may be provided in an amount of about 0.5% to about 2%. The chemical agent may include a lubricating agent, a bonding agent, and/or a stabilizer. In yet another preferred embodiment, the stone plastic composite (SPC) material of the core layer  30  comprises polyvinyl chloride (PVC) in an amount of generally about 24.8%, calcium powder in an amount of generally about 74.5%, and a chemical agent in an amount of generally about 0.7%. The core layer  230  may be formed as an extruded sheet. 
     With reference now to  FIGS. 29-32 , in one or more additional embodiments of the present invention, tile  300  is configured to reduce or avoid staining of the exposed portion(s)  18  and/or  18 ′ comprising the imitation grout line, whether from dirt, oils, dropped food, spilled liquids, etc. For example, the tile  300  shown in  FIG. 29  includes a protective section  370  disposed between a top section  320  and a core layer  330 , and with the exposed portion  18  formed within the protective section  370 . 
     Still referring to  FIGS. 29-32 , the top section  320  of the tile  300  has a top surface  310 , which can be configured to imitate the look and feel of natural materials, as described previously herein, such as natural stone, genuine wood, etc. For example, and as shown in  FIGS. 30 and 31 , the top section  320  of the tile  300  may comprise a wear layer  350  and/or a first decorative layer  360  structured to imitate the look of a desired natural material. The material of the wear layer  350  may be made so as to have a substantially translucent or transparent appearance to permit the design features of the first decorative layer  360  to be seen there-through. The wear layer  350  may comprise a clear polyvinylchloride (PVC) material, and further, may be formed with nano-crystals, e.g., made of micro-ceramic beads or aluminum oxide crystals, so as to be resistant to abrasion. Additionally, the tile  300  illustrated in these embodiments comprises a core layer  330  made of a densified foam material, as previously described herein. In some cases, the core layer comprising a densified foam material may be referred to as a Wood Plastic Composite (WPC), but should not be construed as being limited to this. In other embodiments, it is possible for the core layer  330  to comprise a stone plastic composite (SPC) material, as has also been described herein 
     As best shown in  FIG. 30 , in one or more embodiments the top section  320  of the tile  300  additionally comprises a layer of a polyvinyl chloride (PVC) material  340 . The polyvinyl chloride layer (PVC)  340  may comprise natural or otherwise “virgin” polyvinyl chloride (PVC). This layer of PVC material  340  is preferably disposed between the first decorative layer  360  of the top section and the core layer  330 , and is structured to enhance the rigidity and stability of the tile  300 , particularly in those embodiments where the core layer  330  comprises a densified foam material. 
     As shown in  FIGS. 29-31 , the inventive tile  300  also comprises at least one exposed portion  18  formed on at least one its sides  16 , which is structured to represent an imitation but highly realistic looking grout line. In these embodiments, the exposed portion(s)  18  and/or  18 ′ is formed directly on or within the protective section  370 . 
     The protective section  370  comprises at least a protective layer  380  in one embodiment, but in the preferred embodiments, comprises both a protective layer  380  and another or second decorative layer  390 , as shown in  FIGS. 30 through 32 . In these embodiments, the protective layer  380  is disposed above and/or in immediately adjacent, covering relation to the second decorative layer  390 . Also in these embodiments, the protective layer  380  preferably comprises a material that is either transparent or substantially translucent, so as to permit one or more design features associated with the second decorative layer  390  to be observable therethrough, such as a coloring thereof, that will generally be an intended color of the exposed portion  18  or  18 ′ which closely simulates a real grout line. Ideally, the material of the protective layer  380  is clear or at least translucent, so that the design features of the second decorative layer  390  can be observed, and with little to no distortion. The second decorative layer  390  may comprise a very thin film having a solid color. However, this is not strictly required as it is possible that the second decorative layer  390  comprises a relatively thin film with other design features and/or patterns. Additionally, the protective layer  380  is preferably formed from a vinyl composite material, including a synthetic plastic polymer which may be, but is not limited to, polyvinyl chloride (PVC). During the manufacturing process for the tile  300 , the exposed portion  18  can be formed by a cutting process utilizing a knife, cutting blade(s), etc. to remove material from the top section  320  and side(s)  16  of the tile  300 , to reveal the protective layer  380 , and to form the exposed portion(s)  18  and/or  18 ′ within the protective layer  380  and with a size, shape and texture that closely imitates the look and feel of a real grout line. Accordingly, the vinyl composite material of the protective layer  380  is sufficiently rigid and structured to not only permit the formation of the exposed portion  18 , but to withstand wear and tear conditions associated with flooring, whether from being walked upon, furniture being moved, etc. In addition, the protective layer  380  is structured to provide protection to the exposed portion(s)  18  and/or  18 ′, comprising the imitation grout line, so as to avoid or limit any staining thereof, whether from dust, grease, dirt, oils, pieces of food or other particles. 
     In one or more embodiments, such as but not limited to one where the core layer  330  comprises a stone plastic composite (SPC) material, a coating of another material may be applied to the top surface of the protective layer  380 . By way of example only, this coating may comprise an ethoxyline resin (ER) or a polyurethane (PU) material, which may be cured using an ultra-violet (UV) lighting and heating process. Further, such a coating may comprise an ultra-violet (UV) cured polyurethane (PU) material that may additionally comprise nano-silica, ceramic beads, or otherwise aluminum oxide crystals. Such a coating may be applied during the manufacturing process before boards are cut into individual planks or tile sizes. For most embodiments described herein, however, a tile  300  having a protective section  370  will not need a further protective coating or painting applied to the exposed portion  18  having the appearance of grout line after the tile  300  is manufactured. 
     With reference now to  FIGS. 30-31 , the thickness of the different sections  320 ,  370  and  330 , as well as the various layers of material within them, may vary according to the intended or particular application. As a non-limiting example, the top section  320  of tile  300  may have a depth or thickness in a range of generally about 1.27 millimeters to about 2.77 millimeters (about 0.05 inches to 0.109 inches), comprising a wear layer  350  with a thickness in a range from about 0.2 millimeters (0.008 inches) to about 0.7 millimeters (0.028 inches), a first decorative layer  360  with a thickness of about 0.07 millimeters (about 0.003 inches), and a polyvinyl chloride layer (PVC)  340  having a thickness in a range of about 1 millimeter (about 0.039 inches) to about 2 millimeters (0.079 inches). The protective section  370  may have a depth or thickness in a range of generally about 0.11 millimeters to about 0.69 millimeters (0.004 inches to 0.027 inches), comprising a protective layer  380  with a thickness in a range from about 0.1 millimeter (about 0.004 inches) to about 0.6 millimeters (0.024 inches) and a second decorative layer  390  of about 0.01 millimeters (about 0.0004 inches) to about 0.09 millimeters (about 0.0035 inches). In at least one preferred embodiment, however, the thickness of the protective layer  380  is about 0.3 millimeters (about 0.012 inches) and the thickness of the second decorative layer  390  is about 0.07 millimeters (about 0.0028 inches). Further, the core layer  330  may have a depth or thickness in a range from about 3 millimeters (about 0.118 inches) to about 6 millimeters (about 0.236 inches). As has been described previously herein, the depth of the exposed portion  18  and/or  18 ′, from the top surface  310  of the tile  300 , can vary, such as for example, within a range between about 0.9 millimeters to 2 millimeters. However, in some embodiments, the depth of the exposed portion  18  and/or  18 ′ from the top surface  310  may be less, whether from a slight or minimal depth that may be about 0.3 millimeters deep, or at a greater depth such as up to about 1 millimeter (about 0.039 inches). It is emphasized that the foregoing is provided only for illustrative purposes and should not be construed in a limiting sense. 
     With reference now to  FIG. 32 , another feature of the tile  300  having a protective section  370  is to achieve a substantially uniform appearance, at least in the color of a plurality of exposed portions  18  and/or  18 ′ formed thereon. For example, a tile  300  having an exposed portion  18  structured to represent a grout line formed along one side thereof as shown in  FIG. 30 , may further include additional exposed portion(s)  18 ′ representing a grout line that is formed substantially at or across the top surface  310 , such as but not limited to, across a central or middle section of the tile  300 , as shown in  FIG. 32  and indicated by the dashed lines at  28 . A tile  300  having a protective section  370 , as described herein, is structured to provide a substantially uniform color and appearance to these different exposed portions  18  and/or  18 ′ irrespective of their location on the tile  300  and how each is formed during the manufacturing process. For example, the exposed portion(s)  18  are typically formed along the side(s)  16  of a tile  100  during manufacture using a cutting process with one or more blades applied horizontally, e.g., by a saw or other machine, in generally parallel relation to the tile  1 . Conversely, to form the exposed portion(s)  18 ′ across a middle section  28  of a tile as shown in  FIG. 32 , the cutting process uses one or more blades applied vertically or in perpendicular relation to the tile  300 . 
     By providing tile  300  with a protective section  370 , and forming the exposed portions  18  and/or  18 ′ within protective layer  380 , substantially uniformity can be achieved for a plurality of different exposed portion(s)  18  and/or  18 ′ in terms of the coloring thereof corresponding to imitation grout lines, as the protective layer  380  provides even distribution for the colorant or dye. In contrast, when an exposed portion(s)  18  or  18 ′ is formed directly on a core layer, or on a polyvinyl chloride layer, it is difficult to ensure a consistent appearance and color of the exposed portions  18  and/or  18 ′ because during the manufacturing process, any colorant or dye added to the core layer  330  or polyvinyl chloride (PVC) layer  340  tends to accumulate on the sides, or at the top or bottom surfaces, rather than being evenly distributed, so that when the various exposed portions  18  and/or  18 ′ are formed, the color of the imitation grout line may be less than consistent. Moreover, the protective layer  380  of tile  300  allows for the texture of various exposed portions  18  and/or  18 ′ to be highly similar in appearance, despite some inconsistencies in how the cutting process is applied. 
     With reference now to  FIGS. 33A-39 , the tile of the present invention is also capable of yet further embodiments. More specifically, the inventive tile  400  can comprise at least a top section  420  and a vinyl layer  470 , as well as an exposed portion(s)  18  structured to look like and closely imitate a real grout line, and further along with a core layer  430  in certain embodiments, although this core layer  430  is not always required. 
     Also, and as with other embodiments described herein, the tile  400  may be configured so that the top surface  410  imitates the look and feel of natural materials, including, but not limited to, natural stone, genuine wood, etc. For example, as shown in  FIGS. 33B, 34, 35B and 36B , the top section  410  of the tile  400  may comprise a first wear layer  450  and/or a first decorative layer  460  structured to imitate the look of a desired material. 
     However, and as is also shown in  FIGS. 33B, 34, 35B and 36B , the inventive tile  400  includes a top section  410  comprising a second wear layer  440  and/or a second decorative layer  490 . The second decorative layer  490  is structured to include a color that will preferably correspond to an intended grout color. Additionally, the material of the second wear layer  440  is preferably structured to at least partially reduce staining, and generally provides protection to the second decorative layer  490  below. The wear layer(s)  450  and/or  440  may comprise a substantially translucent material so that the design features of the decorative layer(s)  460  and/or  490  may be seen there-through. 
     As represented in  FIGS. 33A-35B and 39 , the inventive tile  400  may further comprise a core layer  430 . The core layer  430  is adhered to or otherwise joined to the vinyl layer  470  and may comprise a rigid material, such as a stone plastic composite (SPC) material, or alternatively, a densified foam material, as previously described herein. 
     However, and as represented in  FIGS. 36A-38 , it is also within the scope of the present invention to provide a tile  400  having a top section  420  joined to a vinyl layer  470 , but without a core layer  430 . More specifically, in such embodiments, the vinyl layer  470  comprises a solid vinyl material that is structured and disposed to be sufficiently rigid for use as a substrate in flooring applications but also, sufficiently flexible to allow foot comfort for those using the tile  400 . Additionally, the vinyl layer  470  may be sufficiently rigid so that an interconnecting mechanism may be profiled thereon, as described further below. The solid vinyl material of the vinyl layer  470  comprises at least a polyvinyl chloride (PVC) material. However, the solid vinyl material of the vinyl layer  470  may also comprise calcium powder or stone dust. In at least one embodiment, the solid vinyl material of the vinyl layer  470  comprises at least a polyvinyl chloride (PVC) material, calcium powder or stone dust, and a plasticizer. As a non-limiting example, plasticizers commonly referred to as DOTP or dioctyl terephthalate may be used. Other examples of plasticizers that may be used include those that do not comprise phthalate. 
     The following examples of the material composition of the vinyl layer  470  are provided for illustration purposes only, and are not to be considered limiting, as other variations are possible depending on the specific application. For example, the polyvinyl chloride material may be provided in an amount that is about 20% to about 30% of the overall weight of the vinyl layer  470 . Also as an example, the calcium powder or stone dust may be provided in an amount that is about 60% to about 70% of the overall weight of the vinyl layer  470 . As a further example, the plasticizer may be provided in an amount that is about 10% to about 15% of the overall weight of the vinyl layer  470 . In at least one embodiment, the inventive tile  400  comprises a vinyl layer  470  with a vinyl material comprising (i) polyvinyl chloride in an amount that is about 25% of the overall weight of the vinyl layer  470 , (ii) calcium powder or stone dust in an amount that is about 63% to about 65% of the overall weight of the vinyl layer  470 , and (iii) a plasticizer in an amount that is about 10% to about 12% of the overall weight of the vinyl layer  470 . 
     In one or more preferred embodiments, the vinyl layer  470  of the inventive tile  400  such as is illustrated in  FIGS. 33A to 39 , comprises a density of about 1,700 kg/m3 (about 106.128 lb/ft3) to about 2,100 kg/m3 (about 131.099 lb/ft3). Favorable results have been observed with a density of the vinyl layer  470  of about 1,800 kg/m3 (about 112.370 lb/ft3) to about 2,000 kg/m3 (about 124.856 lb/ft3) but acceptable results are achievable at densities somewhat outside of this range, as noted above. In one most preferred embodiment, however, the density of the vinyl layer  470  comprises about 1,900 kg/m3 (about 118.613 lb/ft3). Additionally, in those embodiments of the invention including a core layer  430  in addition to the vinyl layer  470 , such as is shown in  FIGS. 33A to 35B  and  FIG. 39 , the density of the core layer  430  may vary according to the specific substrate, i.e., stone plastic composite (SPC) or a densified foam material. In embodiments where the core layer  430  comprises a stone plastic composite material, the density of the core layer  430  may be about 1,500 kg/m3 (about 94.642 lb/ft3) to about 2,200 kg/m3 (about 137.342 lb/ft3). 
     Still referring to the embodiments illustrated in  FIGS. 33A to 39 , the overall thickness of the inventive tile  400  cany vary according to the specific application. For example, the overall thickness of the tile  400  may range from about 3.5 millimeters (about 0.138 inches) to about 7 millimeters (about 0.276 inches). In embodiments of the tile  400  comprising a core layer  430 , the thickness of the core layer  430  may be about 2 millimeters (about 0.079 inches) to about 3 millimeters (about 0.118 inches). The thickness of the vinyl layer  470  may generally be about 1.5 millimeters (0.059 inches) to about 3.0 millimeters (about 0.118 inches). In at least one embodiment, the thickness of the vinyl layer  470  may be about 1 millimeter (about 0.039 inches) to about 2 millimeters (about 0.079 inches). The thickness of the first wear layer  450  and/or second wear layer  440  may be in a range from about 0.1 millimeters (about 0.004 inches) to about 0.7 millimeters (about 0.028 millimeters). The thickness of the decorative layer(s)  460  and/or  490  may be about 0.05 millimeters (about 0.002 inches) to about 0.1 millimeters (about 0.004 inches). In at least some embodiments, the combined thickness of the wear layer(s)  450  and/or  440 , and the decorative layer  460  and/or  490 , may be about 0.07 millimeters (about 0.003 inches) to about 0.7 millimeters (about 0.028 inches). 
     As shown in  FIGS. 33A-35B and 38 , the inventive tile  400  also comprises at least one exposed portion  18  formed on at least one of its sides  16 , which, as described herein, is structured to represent an imitation grout line. However, and as shown in  FIGS. 35A, 35B and 38 , an exposed portion  18 ′ may also be formed on a middle section  28  of the tile  400 . Additionally, and as represented in  FIGS. 33A-33B and 35A to 38 , the exposed portion(s)  18  and/or  18 ′ may be formed on the top section  420  of the tile  400 . In  FIGS. 33B, 35B and 36B , the exposed portion(s)  18  and/or  18 ′ is illustrated as being formed on the second wear layer  440 . This exposes at least a portion of the second wear layer  440  such that an intended grout color of the second decorative layer  490  may be observed there-through. Further, the second wear layer  440  may be configured to closely approximate the texture of a real grout line. For example, the wear layer  440  may be profiled with cutting knives, saws, or other tools, to result in a texture on the wear layer  440  that closely approximates the look and feel of a real grout line. In an alternative embodiment, as shown in  FIG. 34 , the exposed portion(s)  18  and/or  18 ′ may be formed directly on the core layer  430 , instead of on the top section  420 . 
     With reference now to  FIGS. 36A-36B and 37 , the inventive tile  400  may additional comprise an interconnecting mechanism  480 . As shown in these Figures, the interconnecting mechanism  480  may be formed on the vinyl layer  470 . Alternatively, the interconnecting mechanism  480  may be formed on at least a portion of the vinyl layer  470  and/or a portion of the core layer  430 . In another alternative embodiment, the interconnecting mechanism  480  may be formed on at least a portion of the core layer  430 . Additionally, it is within the scope of the present invention that the interconnecting mechanism  470  comprise a “click” interconnecting mechanism. As used herein, a “click” interconnecting mechanism may be defined as an interconnecting mechanism comprising a male member  482  and/or a female member  484 , which may cooperatively achieve a mating engagement. In at least one embodiment, the male member  482  of one tile  400  may be inserted or otherwise slid into a correspondingly dimensioned female member  484  of another tile  400 , thereby forming a mating engagement. 
     With reference again to  FIGS. 36A-36B and 37 , further features of the inventive tile  400  comprise forming the exposed portion  18  and/or  18 ′ on a portion of the interconnecting mechanism  480 . In embodiments of the inventive tile  400  that do not have a core layer  430 , the exposed portion  18  and/or  18 ′ may be formed on at least a portion the top section  420  above the interconnecting mechanism  480 . For example, the illustrative embodiment of  FIG. 36  shows a tile  400  with an exposed portion  18  formed on a portion of the top section  420  above the male member  482  of the interconnecting mechanism  480 . As a further example, the illustrative embodiment of  FIG. 37  shows a tile  400  with an exposed portion  18  formed a portion of the top section  420  above the female member  484  of the interconnecting mechanism  480 . 
     In terms of manufacturing, the inventive tile  400  generally relies on an extrusion process. For example, the vinyl layer  470  may be formed by being extruded. Additionally, in embodiments of the tile  400  that include a core layer  430 , the core layer  430  may also be extruded, but preferably, as a separate extrusion from the vinyl layer  470 . Thereafter, the vinyl layer  470 , the first wear layer  450  and/or second wear layer  440 , and/or the decorative layer(s)  460  and/or  490 , may be placed in a pressing plate and laminated together under sufficient heat and pressure to create a plank. In embodiments comprising a core layer  430 , the core layer  430 , the vinyl layer  470 , the wear layer(s)  450  and/or  440 , the decorative layer(s)  460  and/or  490 , may be placed in a pressing plate and laminated together under sufficient heat and pressure to create a plank. The plank(s) may be later cut into desired sizes to create individual tiles, and/or profiled to create an exposed portion(s)  18  and/or  18 ′. 
     Additionally, it is within the scope of the present invention to “emboss” the tile  400  to provide a highly realistic natural look. Although it is possible to provide a tile  400  with a surface that imitates various types of natural materials, “embossing” generally provides a flooring tile made of other materials with a highly realistic, natural look and feel of a wood surface. The “embossing” of inventive tile  400  may also be achieved during the manufacturing process. More specifically, “embossing” of the wear layer  450  may be achieved by using a press plate configured to correspond to the pattern of the decorative layer  460 . This may be referred to as an “embossed in register” effect, wherein the press plate is configured to form a plurality of “ridges” on the surface of the first wear layer  450 . Collectively, the plurality of “ridges” may be configured to substantially correspond to the design pattern of the first decorative layer  460  below. This provides an advantage over other “ridge” patters that are substantially linear and may not correspond to the design pattern of the first decorative layer  460 . Providing a tile  400  with a vinyl layer  470  is generally advantageous to achieve “embossing”. The vinyl layer  470  may act as a substrate that is sufficiently malleable to substantially conform, along with the wear layer(s)  450  and/or  440  and the decorative layer(s)  460  and/or  490 , to the profile of an intended “ridge” pattern. 
     With reference now to  FIG. 39 , the inventive tile  400  is shown in another embodiment comprising a top section  420 , a vinyl layer  470 , a core layer  430 , and an additional vinyl layer  470 ′. As illustrated in  FIG. 39 , the additional vinyl layer  470 ′ may be adhered or otherwise joined to the bottom of the core layer  430 . In such embodiments where tile  400  includes an additional vinyl layer  470 ′, the core layer  430  may comprise a stone plastic composite (SPC) material, as described herein. The additional vinyl layer  470 ′ serves to enhance the structural properties of the tile  400 . In embodiments of the tile  400  comprising an additional vinyl layer  470 ′, the thickness of the vinyl layers  470  and/or  470 ′ may be about 1 millimeter (about 0.039 inches) to about 2 millimeters (about 0.079 inches). Furthermore, in embodiments of the tile  400  comprising an additional vinyl layer  470 ′ the density of the vinyl layers  470  and/or  470 ′ may be generally higher to account for their thicknesses. 
     Yet additional embodiments of the present invention may be seen with reference to  FIGS. 40 and 41 . Depicted in such embodiment is a tile  500  comprised of a core layer  530  having a top layer or top section  520  disposed thereon. Such top section  520  may comprise, for instance, a veneer layer or other layer or coating of material, which may be referred to as (but is not limited to) an enamel coating  521 . More specifically, in the illustrated embodiments of  FIGS. 40 and 41 , the top section  520  of the tile  500  may comprise an acrylic and/or a polycrylic coating applied directly onto the core layer  530  via spraying procedures or other similar processes. At least one design element  522  may be disposed on such top section  520 , such as through printing processes, wherein such design element(s)  522  may comprise a texture, groove, impression, undulation, color and/or graphical design, or other feature. For instance, the design element  522  may comprise at least one of the foregoing components in order to imitate the look and feel of a genuine flooring material, such as real stone or wood. In at least one embodiment of the present invention, the top section  520  comprising a veneer layer, other layer of material and/or enamel coating may be approximately one micron in thickness, although other ranges of thickness, both smaller and larger, are envisioned herein. 
     Still referring to  FIGS. 40 and 41 , it may be seen that an additional embodiment of the invention may further comprise a shielding layer  523  disposed thereon. Such a shielding layer  523  may be configured to protect the top section  520  from the absorption of liquids or spills, or from scratches, abrasions, and deformations. Further, in at least one embodiment of the present invention, such shielding layer  523  may be substantially transparent, such that the at least one design element printed onto the veneer layer and/or enamel coating  521  is visible there through. 
     In at least one embodiment of the present invention, the shielding layer  523  may comprise a topical coating, such as an acrylic solution, which may be applied through spraying procedures or other like processes. Alternatively, such a shielding layer  523  may comprise a wear layer such as those previously discussed. Even further, such a shielding layer  523  may instead comprise a film layer, which itself may comprise a thin sheet of polypropylene, polyvinyl chloride, or some other material akin thereto, such as a thermoplastic polymer or a synthetic plastic polymer. As previously stated, such shielding layer  523  may comprise alternative material compositions and thicknesses dependent upon the intended application of the tile  500 . 
     As may be seen with continued reference to  FIGS. 40 and 41 , in at least one embodiment of the present invention wherein the top section  520  comprises a veneer layer, layer of other material and/or enamel coating, the tile  500  may further comprise at least one exposed portion  18  formed within the core layer  510 . More specifically, such an exposed portion  18  may be profiled, via means already discussed herein, after the application of a coating material as one layer (or more) of the top section  520  onto the core layer  510 , and the subsequent application of at least one design element thereon. As may be seen, such an exposed portion  18  may, in at least one embodiment, be disposed in connection with a bevel and/or chamfer  90 , or some other slanted edge formed on the side(s) of the tile, as previously recited herein. As may be understood, in such an embodiment, such an exposed portion  18  may be disposed on at least one edge of the tile, and/or at a middle portion thereof, or otherwise. 
     With reference now to  FIG. 41 , in at least one embodiment of the present invention, such an exposed portion  18  may have a protective coating  540  applied thereon, wherein such protective coating  540  may be configured to protect the same from the absorption of liquids which may be spilled thereon. In at least one embodiment, such a protective coating  540  may comprise a painted coating, or may comprise some other material, whether comprising cement, epoxy, acrylic, urethane, or otherwise, and may function as both a colorant and a sealant. In this manner, it may be understood such a protective coating  540  may be configured to provide the foregoing functional benefits of protecting the grout line from discoloration and/or damage, while likewise providing the exposed portion  18  with a selective coloration. Accordingly, such a protective coating  540  may be disposed to provide the exposed portion  18  with any color which may be deemed suitable for its intended application. For instance, such a protective coating  540  may be selected to match in color with the at least one design element applied onto the top surface. 
     As may be understood, the embodiments of the present invention depicted in  FIGS. 40 and 41  may be formed via a process which may comprise: (a) forming a core layer  510 ; (b) applying a top section  520  onto a core layer  510 , wherein the top section  520  comprises a coating of material, which may be referred to as an enamel coating; (c) applying at least one design element onto the top section  520 ; (d) profiling at least one exposed portion  18  within the core layer  510 ; and (e) applying at least one shielding layer  530  onto the top section  520 ; and (f) applying at least one protective coating  540  onto the exposed portion  18 . In this manner, it may be understood the foregoing embodiment of the present invention may be formed more efficiently and at less cost due to a reduction in layers and, by extension, a reduction in requisite materials. With reference now to  FIG. 42 , in yet additional embodiments of the present invention the tile  500  may additionally comprise at least one interconnecting mechanism  580 . The interconnecting mechanism  580  may itself comprise two disparate portions configured to fit a corresponding portion disposed on an adjacently disposed tile  500 . For instance, such interconnecting mechanism  580  may comprise a male portion  580 a and a female portion  580 b, each of which may itself comprise a tongue side and a groove side, one portion of a click-lock configuration, or any other configuration now known or hereafter developed. Accordingly, it may be understood such a tile  500  may be configured to allow for mating engagement with other adjacently disposed tiles  500 , thereby facilitating alignment there between, and thus the installation thereof. As previously stated, in at least one embodiment of the present invention, such interconnecting mechanism  580  may be structured to permit slight movement and/or rotation between adjacent tiles, which may permit any such installation to accommodate uneven substrates, such as a slab of concrete that is not perfectly level. 
     With continued reference to  FIG. 42 , it may be seen that such a tile  500  may comprise a top section  520  disposed on or in connection with a core layer  530 , the latter of which may be comprised of any rigid material, such as a densified foam material, a stone plastic composite material, a wood plastic composite material, a stone polymer composite material, or otherwise. As previously stated, such top section  520  may, in certain embodiments, comprise a polyvinyl chloride (PVC) layer. However, in the embodiment depicted in  FIG. 42 , such top section  520  may instead comprise a veneer layer and/or layer of other material, such as a coating of material, which may be referred to herein as (but not limited to) an enamel coating  521  which, as previously stated may comprise in some embodiments an acrylic and/or polycrylic coating applied directly onto the core layer  530 . Disposed on top of such enamel coating  521  may be at least one design element  522 , such as a texture, groove, impression, undulation, color or graphical design, or any feature which may, in certain embodiments, be configured to imitate the look and feel of a genuine flooring material, such as real stone or wood. Such enamel coating  521  and at least one design element  522  may have a shielding layer  523  disposed thereon, coincident with the top surface  510  of the tile, which may be configured to protect the tile  500  from scratches, abrasions, and deformations, and/or from the absorption of liquids. As previously stated, alternative embodiments of such a shielding layer  523  may comprise an acrylic solution, a wear layer such as the one previously discussed herein, or at least one thin sheet of polypropylene, polyvinyl chloride, or some other material akin thereto, such as a thermoplastic polymer or a synthetic plastic polymer. As may be seen, such a tile  500  may further comprise at least one exposed portion  18 , which itself may be disposed in connection with a bevel and/or chamfer  90 . 
     In accordance with the foregoing, depicted in  FIG. 43  a tile  500  having at least two exposed portions  18 , wherein one of such exposed portions  18  is configured not at the edge of the tile  500 , but rather central or middle portion thereof. More specifically, the tile  500  shown in the embodiment depicted in  FIG. 43  may comprise a core layer  530 , which itself may comprise, for instance, a stone plastic composite material; however, alternative material compositions of such core layer  530  are envisioned herein. As may be understood, and in connection with at least one embodiment previously recited herein, such exposed portion  18  may extend completely across the top surface  510  of the tile  500  between opposite sides thereof. As may also be seen in  FIG. 43 , in, the tile  500  may further comprise a top section  520  disposed directly on or in connection with the core layer  530 . Such top section  520  may comprise a veneer layer and/or other layer of material, including a coating of material such as an enamel coating  521 , which itself may comprise, for instance, a polyurethane coating. As may be seen, such an enamel coating  521  may be configured such that the exposed portion  18  is disposed within such enamel coating  521 , or otherwise has such enamel coating  521  disposed thereon. 
     Further, such a top section  520  may additionally comprise at least one design element  522  applied onto such an enamel coating  521 . As previously stated, such at least one design element  522  may comprise, for instance, at least one, or a plurality of textures, grooves, impressions, undulations, color or graphical designs, or any other feature now known or hereafter developed. Disposed on such an enamel coating  521 , and thus such at least one design element  522 , may be a shielding layer  523  which, as previously stated may comprise a topical coating, a wear layer, a film layer of polypropylene and/or polyvinyl chloride, or any other material, whether a thermoplastic polymer, a synthetic plastic polymer, or otherwise. 
     Since many modifications, variations and changes in detail can be made to the described preferred embodiment of the invention, it is intended that all matters in the foregoing description and shown in the accompanying drawings be interpreted as illustrative and not in a limiting sense. For example, the various ranges given herein as the density of a material or for the depth of thickness of a section of the inventive tile should not be considered as the only possibilities. As another example, when using the words “preferably” or “in a preferred embodiment” and similar language, it is intended to mean one particular embodiment, and it should be appreciated that other embodiments are possible and considered part of the invention herein. Thus, the scope of the invention should be determined by the appended claims and their legal equivalents.