Abstract:
The present document describes a protective wrapper for a roll having two ends and a length defining a distance between the two ends, the protective wrapper comprising: first one layer of paper material having two opposed edges and an edge strip at at least one of the two opposed edges of the first layer of paper material, the edge strip comprises one and only one layer of the paper material and the edge strip is for being inwardly crimped against one of the two ends; and a layer of protective material superposed to the first layer of paper material, the layer of protective material not overlapping the edge strip; wherein the first layer of paper material has a width greater than the distance between the two ends of the roll.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority under 35USC§119(e) of U.S. provisional patent application 61/671,199, filed on Jul. 13, 2012, the specification of which is hereby incorporated by reference. 
     
    
     BACKGROUND 
       [0002]    (a) Field 
         [0003]    The subject matter disclosed generally relates to protective wrapper for rolls to prevent penetration by liquid, such as water. More particularly, the subject matter disclosed relates to protective wrapper for paper rolls that provides impermeable roll ends and to a method for wrapping a paper roll using the same. 
         [0004]    (b) Related Prior Art 
         [0005]    Newsprint and other forms of paper are manufactured and processed as large elongated sheets or webs. For storage and transport, the paper stock is wrapped around a core to form a cylindrical paper roll. The paper rolls may be very heavy. A typical paper roll may range from about 25 to about 72 inches in diameter and, sometimes, as large as about 145 inches or more. To protect the paper roll from moisture, the atmosphere, and physical abrasions, the paper roll itself is wrapped in a moisture proof paper for paper rolls. Typically the paper rolls are then stacked one on the other and stored on end. Specialized machinery must be employed to automatically apply wrapping material or wrapping papers to the large paper rolls. 
         [0006]    Various methods have previously been used to wrap paper rolls. One of the most known methods has been to first wrap the roll in one or two layers of a protective wrapping paper, with the wrapping paper extending outwardly beyond the end of the paper roll. Next, interior roll headers (i.e., disks formed of corrugated cardboard, chipboard, coated chipboards, laminated Kraft paper and the like) are fitted inside the wrapping paper against the ends of the paper roll. The wrapping paper is then crimped over the edges of the inner roll headers at the ends of the paper rolls using a crimping wheel or any other appropriate technique. A set of outer roll headers (i.e., somewhat thinner disks typically formed of a Kraft paper with a polymer coating on the inside surface) are then attached to the ends of the paper roll over the crimped edges. The inner and outer roll headers and the wrapping paper are held in place and affixed to one another through the use of an adhesive, such as a heat sensitive material (i.e., a polymer coating), on the inside surface of the outer roll header and/or the outward face of the inner roll header. 
         [0007]    The outer roll headers are affixed to the ends of the paper rolls in a typical roll wrapping machine by applying heat, pressure or the like in accordance with the properties of the adhesive material used. 
         [0008]    However, with the technique described above, the wrapping paper is not perfectly sealed at the ends of the paper rolls, even though the wrapping paper and the inner and/or outer roll headers, if any, are rendered watertight due to polymeric coatings. Indeed, channels are formed in the crimp, i.e., crimp tunnels that allow liquid infiltration along the crimps when the wrapped paper rolls is in contact with liquids during storage and, more particularly, transport. The infiltrated liquid flows towards the inner roll header and the paper roll, causing damages to the later. Damage typically happens during roll transportation, transit, and warehousing when environmental water (i.e., hail, sleet, snow, water puddles along the route, etc.) enters the trailer or boxcar through defective walls, floors, doors and the like. Infiltration occurs through the end of the wrapped paper roll, notwithstanding use of watertight wrapper and headers, because wrapped roll is standing on its end on a floor that is often getting wet during transit. Damage to the paper rolls incurs financial burden to the purchaser, the manufacturer, and/or the transporter. 
         [0009]    Other methods have previously been used to wrap paper rolls. For example, some methods provide a wrapping paper for a paper roll having two opposed roll ends, where the wrapping paper includes a paper layer and at least one exposed strip having adhesive properties. These paper layers bonded with the at least one exposed strip provide the crimped edges with a thickness which promote the formation of channels in the crimp. In this example, the exposed strip has an adhesive layer. 
         [0010]    For these reasons, there is certainly a need to provide an improved protective wrapper for paper rolls that provide impervious roll ends and that is less expensive and still very resistant to humidity and moisture at the ends of the paper rolls and a method for wrapping a roll using the same. 
       SUMMARY 
       [0011]    According to an embodiment, there is provide a protective wrapper for a roll having two ends and a length defining a distance between the two ends, the protective wrapper comprising: first layer of paper material having two opposed edges and an edge strip at at least one of the two opposed edges of the first layer of paper material, the edge strip comprises one and only one layer of the paper material and the edge strip is for being inwardly crimped against one of the two ends; and a layer of protective material superposed to the first layer of paper material, the layer of protective material not overlapping the edge strip; wherein the first layer of paper material has a width greater than the distance between the two ends of the roll. 
         [0012]    According to another embodiment, the layer of protective material comprises ethylene methacryalate, ethylene-vinyl acetate, polyurethane, polyethylene, polypropylene, high density polyethylene and any combination thereof. 
         [0013]    According to a further embodiment, the protective wrapper further comprises a second layer of paper material superposed to at least one of: the first layer of paper material and the layer of protective material, the second layer of paper material not overlapping the edge strip. 
         [0014]    According to yet another embodiment, the second layer of paper material is superposed to the layer of protective material, such that the layer of protective material is not exposed. 
         [0015]    According to another embodiment, the layer of protective material is superposed to a side of the first layer of paper material and wherein the protective wrapper further comprises a second layer of protective material superposed to another side of the first layer of paper material, the second layer of protective material not overlapping the edge strip. 
         [0016]    According to a further embodiment, at least one of: the first layer of paper material and the second layer of paper material includes a material in the group consisting of: a conventional type of flexible paper, a flexible type of flexible cardboard, a linerboard, a laminated paper, a virgin Kraft paper, a recycled paper or a combination thereof. 
         [0017]    According to yet another embodiment, the edge strip comprises two edge strips, each one of the two edge strips is for being inwardly crimped against a corresponding one of the two ends of the roll. 
         [0018]    According to another embodiment, the protective wrapper further comprises two inner roll headers installed at each one of the two ends of the roll and wherein the two edge strips are for being inwardly crimped against the two inner roll headers. 
         [0019]    According to a further embodiment, the protective wrapper further comprises an outer roll header for covering at least partially at least one of the two ends and the crimped edge strip, thereby providing protection against the elements at at least one of the two ends of the roll. 
         [0020]    According to yet another embodiment, the protective wrapper further comprises an inner roll header to be installed at at least one of the two ends of the roll and wherein the edge strip is for being inwardly crimped against the inner roll header. 
         [0021]    According to another embodiment, the inner roll header covers at least partially at least one of the two ends of the roll. 
         [0022]    According to a further embodiment, the inner roll header defines a disc-like shape. 
         [0023]    According to yet another embodiment, the outer roll header defines a disc-like shape. 
         [0024]    According to another embodiment, the inner roll header defines a disc-like shape and wherein the disc-like shape of the inner roll header and the disc-like shape of the outer roll header define an equivalent disc-like shape. 
         [0025]    According to a further embodiment, the protective wrapper further comprises a layer of heat sensitive material coated to at least one of: the inner roll header and the outer roll header for linking the at least one of: the inner roll header and the outer roll header with the crimped edge strip, the layer of heat sensitive material having a surface area not exceeding another surface area of the ends of the roll. 
         [0026]    According to yet another embodiment, the outer roll header comprises two outer roll headers and the inner roll header comprises two inner roll headers, one of each for each one of the two ends of the roll. 
         [0027]    According to another embodiment, at least one of: the outer roll header and the inner roll header further comprises adhesive properties for being linked with the crimped edge strip and wherein the adhesive properties are activated by heat, infrared, ultraviolet light, ultrasound, pressure, microwaves, radiowaves, X-rays or any combination thereof. 
         [0028]    According to another embodiment, there is provided a protective wrapper for a roll having two ends and a length defining a distance between the two ends, the protective wrapper comprising: an inner roll header to be installed at at least one of the two ends; first layer of paper material having two opposed edges and an edge strip at at least one of the two opposed edges of the first layer of paper material, the edge strip comprises one and only one layer of the paper material and the edge strip is for being inwardly crimped against the inner roll header; a layer of protective material superposed to the first layer of paper material, the layer of protective material not overlapping the edge strip; and an outer roll header for covering at least partially the inner roll header and the crimped edge strip, thereby providing protection against the elements at at least one of the two ends of the roll; wherein the first layer of paper material has a width greater than the distance between the two ends of the roll. 
         [0029]    According to a further embodiment, the edge strip comprises two edge strips, each one of the two edge strips is for being inwardly crimped against a respective inner roll header at a corresponding one of the two ends of the roll. 
         [0030]    According to a further embodiment, there is provided a method for wrapping a roll having two ends and a length defining a distance between the two ends, the method comprising the steps of: installing an inner roll header at at least one of the two ends of the roll; wrapping the roll with a first layer of paper material having a width greater than the length of the roll and an edge strip which comprises one and only one layer of the paper material, the first layer of paper material being superposed to a layer of protective material which has a width not exceeding the distance between the two ends of the roll; and inwardly crimping the edge strip against at least one of the two ends of the roll for contributing to the reduction of overlapped areas and crimp tunnels on the at least one of the two ends. 
         [0031]    Features and advantages of the subject matter hereof will become more apparent in light of the following detailed description of selected embodiments, as illustrated in the accompanying figures. As will be realized, the subject matter disclosed and claimed is capable of modifications in various respects, all without departing from the scope of the claims. Accordingly, the drawings and the description are to be regarded as illustrative in nature and not as restrictive and the full scope of the subject matter is set forth in the claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0032]    Further features and advantages of the present disclosure will become apparent from the following detailed description, taken in combination with the appended drawings, in which: 
           [0033]      FIG. 1  is a perspective view of a paper roll being wrapped in accordance with an embodiment; 
           [0034]      FIG. 2  is a perspective view, fragmented, of a roll end of the paper roll shown in  FIG. 1 ; 
           [0035]      FIG. 3  is a perspective view of the paper roll wrapped in the protective wrapper of  FIG. 1 , where inner roll headers are juxtaposed to the roll ends; 
           [0036]      FIG. 4  is a perspective view of the protective wrapper in accordance with another embodiment; 
           [0037]      FIG. 5A  is a cross-section view, enlarged, of a protective wrapper in accordance with another embodiment; 
           [0038]      FIG. 5B  is a cross-section view, enlarged, of a protective wrapper in accordance with another embodiment; 
           [0039]      FIG. 5C  is a cross-section view, enlarged, of a protective wrapper in accordance with another embodiment; 
           [0040]      FIG. 5D  is a cross-section view, enlarged, of a protective wrapper in accordance with another embodiment; 
           [0041]      FIG. 5E  is a cross-section view, enlarged, of a protective wrapper in accordance with another embodiment; 
           [0042]      FIG. 5F  is a cross-section view, enlarged, of a protective wrapper in accordance with another embodiment; 
           [0043]      FIG. 6  is a top plan view, fragmented, of a roll end of the paper roll wrapped in the protective wrapper shown in  FIG. 3 ; and 
           [0044]      FIG. 7  is a perspective view of the paper roll wrapped in the protective wrapper of  FIG. 3 , where outer roll headers are juxtaposed to the roll ends with its respective inner roll headers. 
       
    
    
       [0045]    It will be noted that throughout the appended drawings, like features are identified by like reference numerals. 
       DETAILED DESCRIPTION 
       [0046]    In embodiments there is disclosed a protective wrapper for protecting rolls to prevent penetration by liquids, such as water, and, more particularly, there is disclosed a protective wrapper that provides impervious roll ends. 
         [0047]    Referring now to the drawings, and more particularly to  FIG. 1 , there is shown a perspective view of a roll  20  being wrapped in a protective wrapper  30 . For example, the roll  20  may be a conventional paper roll  20  which has a longitudinal roll axis  22 , a pair of longitudinally spaced-apart roll ends  24 ,  25  and an outer roll surface  26  extending between the roll ends  24 ,  25  and radially spaced along the longitudinal roll axis  22 . The roll  20  is characterized by a length L 1  along the longitudinal roll axis  22 . 
         [0048]    The roll  20  is wrapped with a first layer of paper material  40  which has a width W 1 , longer than the length L 1  of the roll  20 , in a manner such that the longitudinal edge strips  32   a ,  32   b  of the first layer of paper material  40  extend outwardly beyond the roll ends  24 ,  25  or such that only one of the longitudinal edge strips  32   a  or  32   b  ( 32   a  and  32   b  on  FIG. 1 ) of the first layer of paper material  40  extend outwardly beyond one roll end  24  or  25 . The edge strips  32   a  or  32   b  comprises one and only one layer of the paper material. In general, the edge strips  32   a ,  32   b  of the protective wrapper  30  typically extend between about one to ten inches and, preferably, between about two to three inches, beyond the roll ends  24 ,  25  but that they can be wider or narrower. 
         [0049]    According to an embodiment and still referring to  FIG. 1 , there is provided a protective wrapper  30  for a roll  20  which has two ends  24 ,  25  and a length L 1 . The roll  20  has a disk-shaped (i.e., or any suitable shape) inner roll header  34  ( FIGS. 1 and 3 ) installed at one of the two ends  24 ,  25 . The protective wrapper  30  includes the first layer of paper material  40  which has a width W 1  greater than the length L 1  of the roll  20  and an at least one edge strip  32   a  and/or  32   b . Again, the edge strips  32   a  or  32   b  comprises one and only one layer of the paper material. The protective wrapper  30  also includes a layer of protective material  42  ( FIG. 4  and  FIGS. 5A-5F ) superposed to the first layer of paper material  40 . The layer of protective material  42  is not overlapping the edge strip  32   a  and/or  32   b . The edge strips  32   a  and/or  32   b  are for being inwardly crimped against at least one of the two ends  24 ,  25  and/or the inner roll header  34  of the roll  20  thereby contributing to the reduction of overlapped areas  38  ( FIG. 2 ) and crimp tunnels on the at least one of the two ends  24 ,  25 . Indeed, since the protective wrapper  30  includes first layer of paper material  40  extending from at least one roll end  24  or  25 , the protective wrapper  30  is then thinner at the ends  24 ,  25  of the roll  20  and easier to be crimped towards one of the roll ends  24 ,  25  or towards one of the inner roll header  34 ,  35 . 
         [0050]    According to another embodiment, and now referring to  FIGS. 5C ,  5 D,  5 E and  5 F, the protective wrapper  30  may further includes a second layer of paper material  44  superposed to the layer of paper material  40  and the layer of protective material  42 . It is to be noted that the second layer of paper material  44  also has a width W 2  not exceeding the length L 1  of the roll  20  or not overlapping the edge strip  32   a  and/or  32   b . More preferably, the second layer of paper material  44  is superposed to the layer of protective material  42 , such that the layer of protective material  42  is not exposed. More particularly, as shown on  FIG. 5A , the layer of protective material  42  is superposed to the first layer of paper material  40  for providing two exposed edge strips  32   a ,  32   b .  FIG. 5B  shows a layer of protective material  42  superposed to the first layer of paper material  40  for providing only one exposed edge strip  32   a .  FIG. 5C  shows a layer of protective material  42  superposed to the first layer of paper material  40  and a second layer of paper material  44  superposed to the layer of protective material  42  for providing two exposed edge strips  32   a ,  32   b .  FIG. 5D  shows a layer of protective material  42  superposed to the first layer of paper material  40  and a second layer of protective material  45  superposed to the first layer of paper material  40  for providing two exposed edge strips  32   a ,  32   b . On the other end,  FIG. 5E  shows a layer of protective material  42  superposed to the first layer of paper material  40  and a second layer of paper material  44  superposed to the layer of protective material  42  for providing only one exposed edge strip  32   a .  FIG. 5F  shows a layer of protective material  42  superposed to the first layer of paper material  40  and a second layer of protective material  45  superposed to the first layer of paper material  40  for providing only one exposed edge strip  32   a.    
         [0051]    According to another embodiment, the layer of protective material and/or the second layer of protective material may be made of ethylene methacryalate (i.e., EMA), ethylene-vinyl acetate (i.e., EVA), polyurethane, polyethylene, polypropylene, high density polyethylene, and any other suitable protective material. The layer of protective material and the second layer of protective material can also be a multilayered material such as EMA/polyethylene, EVA/polyethylene, polyethylene/high density polyethylene and the like. 
         [0052]    According to an embodiment, the first layer of paper material  40  and the second layer of paper material  44  are in the group consisting of, without limitation, any conventional type of flexible paper or cardboard, laminated paper, virgin Kraft paper, recycled paper, any combination, and the like. 
         [0053]    According to an embodiment, and as shown on  FIGS. 1 ,  3 ,  5 A,  5 C,  5 D and  7 , the protective wrapper  30  defines two edge strips  32   a ,  32   b . Each one of the edge strips  32   a ,  32   b  is for being inwardly crimped against a respective inner roll header  34  at a corresponding one of the two ends  24 ,  25  of the roll  20 . This contributes to the reduction of overlapped areas  38  ( FIGS. 2 and 6 ) and crimp tunnels on the two ends  24 ,  25  formed because of the crimped edge strips  32   a ,  32   b.    
         [0054]    According to another embodiment and referring now to  FIG. 3 , it is shown that the protective wrapper  30  may further include an inner roll header  34  for covering at least partially at least one of the two ends  24 ,  25  of the roll  20 . 
         [0055]    According to another embodiment and referring now to  FIG. 7 , the protective wrapper  30  may further include an outer roll header  35  for covering at least partially the inner roll header  34  and the crimped edge strip  48  ( FIGS. 2 ,  6  and  7 ) for providing protection against the elements at at least one of the two ends  24 ,  25  of the roll  20 . It is to be noted that the protective wrapper  30  may only include one of the inner and outer roll headers  34 ,  35  at only one of the roll ends  24 ,  25 . 
         [0056]    According to another embodiment and still referring to  FIGS. 3 ,  6  and  7 , there is shown that at least one of the inner roll header  34  and the outer roll header  35  defines a disc-like shape. More particularly, the inner roll header  34  and the outer roll header  35  define a disc-like shape. The disc-like shape of the inner roll header  34  and the disc-like shape of the outer roll header  35  may define an equivalent disc-like shape. It is to be noted that the inner and outer roll headers  34 ,  35  may define any other suitable shape and/or configuration such as to receive the edge strips  32   a  and/or  32   b  or the protective wrapper  30 . 
         [0057]    According to another embodiment, there is shown that the protective wrapper  30  may further include a layer of heat sensitive material (not shown) coated to at least one of the inner roll header  34  and the outer roll header  35  for linking the at least one of the inner roll header  34  and the outer roll header  35  with the crimped edge strip  48 . It is to be noted that the layer of heat sensitive material (not shown) has a surface area not exceeding another surface area defined by the ends  24 ,  25  of the roll  20 . 
         [0058]    According to another embodiment, the protective wrapper includes two outer roll headers  35  and two inner roll headers  34 , one of each for each one of the two ends  24 ,  25  of the roll  20 . 
         [0059]    According to an embodiment, at least one of the outer roll header  35  and the inner roll header  34  further include adhesive properties for being linked with the crimped edge strip  48 . The adhesive properties may be activated, without limitations, by heat, infrared, ultraviolet light, ultrasound, pressure, microwaves, radiowaves, X-rays, any combination, and the like. 
         [0060]    According to another embodiment, a method for wrapping a roll  20  having two ends  24 ,  25  and a length L 1  includes a step of installing an inner roll header  34  at at least one of the two ends  24  and/or  25  of the roll  20 . The method may also include a step of wrapping the roll  20  with first layer of paper material  40  having a width W 1  greater than the length L 1  of the roll  20  and an edge strip  32   a  or  32   b . Again, the edge strips  32   a  or  32   b  comprises one and only one layer of the paper material. It is to be mentioned that the first layer of paper material  40  is superposed to a layer of protective material  42  which has a width W 2  not exceeding the length L 1  of the roll  20 . The method may also include the step of inwardly crimping the edge strip  32   a  or  32   b  against at least one of the two ends  24  or  25  of the roll  20  for contributing to the reduction of overlapped areas  38  and crimp tunnels on the at least one of the two ends  24  or  25 . 
         [0061]    According to an embodiment, the method may further include the step of installing an outer roll header  35  at at least one of the two ends  24 ,  25  of the roll  20  and on the crimped edge strip  48  for providing protection against the elements at at least one of the two ends  24  and/or  25  of the paper roll  20 . 
         [0062]    The edge strips  32   a  and  32   b  may be crimped using a crimping wheel which hammers the edge strips  32   a  and  32   b  onto the ends  24  and/or  25  of the roll  20 . It will be appreciated that any other suitable technique can be used to crimp the extending edge strips  32   a ,  32   b . Each of these edge strips  32   a  and  32   b  of the protective wrapper  30  overlap onto itself on the roll ends  24  during the crimping procedure. As the edge strips  32   a  and  32   b  are crimped over the roll ends  24 , ridges  36  are produced and part of the protective wrapper  30  overlaps onto itself forming overlapped areas  38  ( FIG. 2 ). Crimp tunnels (not shown) are defined between the overlapped areas  38  of protective wrapper  30 . If not properly sealed, the crimp tunnels liquid infiltration towards the roll  20 , causing damages to the later. Indeed, the outer roll header  35  is then secured to the roll ends  24  over the crimped edge strips  32   a  and  32   b  to complete the protection of the roll  20 . 
         [0063]    Referring now to  FIG. 3 , it will be seen another embodiment, where the roll  20  is wrapped into the protective wrapper  30 . Either before or after the protective wrapper  30  has been applied to the roll  20 , inner roll headers  34  have been juxtaposed to the roll ends  24 . The edge strips  32   a  and  32   b  extend beyond the inner roll headers  34 . The extending edge strip  32   a  and  32   b  are crimped over the inner roll headers  34 . The protective wrapper  30  and the inner roll headers  34  form an integral part in the protection of the roll  20 . 
         [0064]    Additionally, the inner and outer roll headers  34 ,  35  may be made of, without limitation, linerboard corrugated cardboard, chipboard, or laminated Kraft paper, for example. The inner and outer roll headers  34 ,  35  can include adhesive properties on one face, or on both faces. Usually, the adhesive is found on the face in contact with the crimped edge strips  48 . More particularly, the inner roll header  34  may be made of chipboard or of a corrugated cardboard. One the other hand, the outer roll header  35  may be made of a linerboard coated with a polyethylene (i.e., low density and/or high density) or coated with a polypropylene mixed with a low density polyethylene. 
         [0065]    The layer of a heat sensitive material (not shown) may include, without limitations, EMA, EVA, polyurethane, polyethylene, polypropylene, high density polyethylene, and any other suitable heat sensitive material. The layer of a heat sensitive material (not shown) can also be a multilayered material such as EMA/polyethylene, EVA/polyethylene, polyethylene/high density polyethylene, and the like. 
         [0066]    The layer of adhesive material (not shown) can be applied to the inner and outer roll headers  34 ,  35  by extrusion or water coating, solvent less coating, heating process (or 100% solid coating, spraying or any other suitable technique). It is to be mentioned that the inner and/or outer roll headers  34 ,  35  may have the same surface area than the surface area defined by the ends of the paper roll  20 . For example, the roll  20 , and the inner and/or outer roll header  34 ,  35  may have a diameter of 48 inches. 
         [0067]    For protecting the roll  20  from external moisture, the atmosphere, and physical abrasions, the protective wrapper  30  can have moisture proof properties along its width W 1 . The layer of protective material  42  can be selected to provide the moisture proof properties to the protective wrapper  30 . In that case, the layer of protective material  42  can cover the protective wrapper  30  along the entire length L 1  of the roll  20 . 
         [0068]    Referring now to  FIG. 6 , it will be seen that once the roll  20  is wrapped in the protective wrapper  30 , the edge strips  32   a  is crimped over inner roll headers  34 , juxtaposed to the roll ends  24 . As mentioned, crimping the edge strips  32   a  and  32   b  over the inner roll headers  34  reduces the overlapped areas and crimp tunnels on the protective wrapper  30 , between the overlapped areas  38  since there is only one and only one layer of paper material  40  forming the edge strip  32   a  or  32   b.    
         [0069]    As for the previously described embodiments, when folded toward the roll ends  24 ,  25  the overlapped areas  38  of the protective wrapper  30  are in paper to adhesive contact with the inner and/or outer roll headers  34 ,  35 , thereby providing improved barrier properties to elements of the external environment. 
         [0070]    The adhesive properties of the inner and/or outer roll headers  34 , can be activated by any suitable technique. For example, it can be activated by heat, infrared, ultraviolet light, ultrasound, pressure, microwaves, radiowaves, X-rays and any other suitable source to activate adhesives. As mentioned above, the inner and outer roll headers  34 ,  35  can be placed on one end  24  or  25 , or on both ends  24  and  25  of the roll  20 . 
         [0071]    The temperature for the activation of the layer of heat sensitive material (not shown), the pressure applied, and the time required to obtain bonds depend on the nature of the adhesive material and the paper material used. For example, without being limitative, the temperature can vary between 325-450° F., the pressing time can vary between 1-40 seconds, and the heating time can vary between 5-60 seconds. 
         [0072]    The roll ends  24 ,  25  along the lengths of the crimped edge strips  48 , of the wrapped rolls  20  obtained with the protective wrapper  30  described above is watertight. This prevents liquid infiltration along the crimped edge strips  48 . 
         [0073]    The roll  20  can be any type of rolled paper including coated printing paper. However, it will appreciate that the above described protective wrapper  30  can be applied to any rolled material that needs to be wrapped and protected from liquids and/or moisture infiltration. 
         [0074]    The protective wrapper  30  can be manufactured on existing roll wrap extruders, laminators, extruders and coater-laminators and can be applied to the roll  20  with existing roll wrapping equipment. 
         [0075]    It will be appreciate that the roll  20  can be wrapped one turn or more by the protective wrapper  30 , depending upon the physical properties of the protective wrapper  30 . In an embodiment, only one edge strip  32   a  or  32   b  is crimped over an end  24  or  25  of the roll, the end  24  or  25  on which the corresponding edge strip  32   a  or  32   b  is crimped may be the one in contact with the floor during storage and transport. 
         [0076]    The embodiments described above are intended to be exemplary only. Several alternatives are possible. For example, it is possible to wrap the roll  20  without using one of or both inner and outer roll headers  34 ,  35 . The protective wrapper  30  could be used to protect various moisture sensitive articles not only paper rolls  20 . 
         [0077]    While preferred embodiments have been described above and illustrated in the accompanying drawings, it will be evident to those skilled in the art that modifications may be made without departing from this disclosure. Such modifications are considered as possible variants comprised in the scope of the disclosure.