Patent Publication Number: US-2013233761-A1

Title: Buffer Sheet Facilitating Chuck Adsorption and Taking and Glass Transport Package

Description:
TECHNICAL FIELD 
     The invention relates to the field of package, and more particularly to a buffer sheet facilitating chuck adsorbing and taking, and a glass transport package. 
     BACKGROUND 
     Conventional liquid crystal display (LCD) devices in mass production employ some large-size thin glass plate. To prevent the glass plates from being broken during transportation, multilayer glass plates are superposed in a packaging container to form a glass transport package. As shown in  FIG. 1  and  FIG. 2 , a buffer sheet  2  which prevents the glass plates from mutually sticking and plays a buffer role is arranged between two adjacent glass plates  1 , and the buffer sheet  2  is provided with closed diamond grid-shaped surface grains. After interactively superposing and packaging the glass plates  1  and the buffer sheets  2 , and standing the packaging container for a while, the buffer sheets  2  and the glass plates  1  are adsorbed by vacuum and are difficult to separate, causing the glass plates and the buffer sheets are difficult to take out and separate, and even causing the glass to break. 
     SUMMARY 
     In view of the above-described problems, the aim of the invention is to provide a liquid crystal glass transport package and a buffer sheet facilitating chuck adsorption and taking 
     A first technical scheme of the invention is that: a buffer sheet facilitating chuck adsorption and taking comprises a substrate, and surface grains protruding from the substrate; the buffer sheet comprises adsorption zones, and non-adsorption zones; the surface grains of the adsorption zones are of a close pore structure, and the surface grains of the non-adsorption zones are partially or fully of an open pore structure for avoiding generating negative pressure. 
     Preferably, the open pore structure of the surface grains of the non-adsorption zone is provided with open paths only facing the two parallel edges of the buffer sheet. Air is supplemented from two directions, and better effect is obtained because the air complementing paths are direct and short. 
     Preferably, the open pore structure of the surface grains of the non-adsorption zones is provided with open paths facing all the four edges of the buffer sheet. Air is supplemented to the non-adsorption zones from four directions, and then the problem of vacuum adsorption can be effectively solved. 
     Preferably, the heights of the surface grains of the non-adsorption zones are consonant. 
     Preferably, the heights of the surface grains of the non-adsorption zones are inconsistent. The stepped buffer structure has better buffer effect, and different heights of the surface grains further widen the air inlet/outlet passage, thereby more effectively preventing vacuum adsorption. 
     Preferably, the surface of the substrate is airtight. 
     A second technical scheme of the invention is that: a buffer sheet facilitating chuck adsorption and taking comprises a substrate; wherein the buffer sheet comprises adsorption zones, and non-adsorption zones; the non-adsorption zones are provided with through hole(s) used for avoiding generating negative pressure. 
     Preferably, the number of the through hole(s) is two or more. 
     Preferably, the substrate of the adsorption zones is further provided with surface grains protruding from the substrate, and the surface grains of the adsorption zones are of a closed pore structure. 
     Preferably, the substrate of the non-adsorption zones is further provided with surface grains protruding from the substrate, and the surface grains of the non-adsorption zones are fully or partially of an open pore structure. 
     Preferably, the heights of the surface grains of the non-adsorption zones are consonant. 
     Preferably, the heights of the surface grains of the non-adsorption zones are inconsistent. The stepped buffer structure has better buffer effect, and different heights of the surface grains further widen the air inlet/outlet passage, thereby more effectively preventing vacuum adsorption. 
     The invention further provides a liquid crystal glass transport package, comprising glass plates, and a buffer sheet; the buffer sheet is arranged between two adjacent glass plates. The buffer sheet comprises a substrate, and surface grains protruding from the substrate; the buffer sheet comprises adsorption zones, and non-adsorption zones; the surface grains of the adsorption zones are of a close pore structure, and the surface grains of the non-adsorption zones are partially or fully of an open pore structure for avoiding generating negative pressure. 
     Preferably, the open pore structure of the surface grains of the non-adsorption zones is provided with open paths only facing the two parallel edges of the buffer sheet. 
     Preferably, the open pore structure of the surface grains of the non-adsorption zones is provided with open paths facing all the four edges of the buffer sheet. 
     Preferably, the heights of the surface grains of the non-adsorption zones are consonant. 
     Preferably, the heights of the surface grains of the non-adsorption zones are inconsistent. 
     Preferably, the surface of the substrate is airtight. 
     The open pore structure of the invention is an open surface grain structure formed by fully or partially opening the surface grains of the substrate, called open pore structure for short here. The open pore structure enables the outside air and the air between the buffer sheet and the glass plates to freely flow, namely, the outside air can quickly enter between the buffer sheet and the glass plates from the periphery of the buffer sheet. Because the close pore structure is in a closed state of the surface grains of the substrate, the air between the buffer sheet and the glass plates can not be circulated with the outside air. 
     Advantages of the invention are summarized below: the liquid crystal glass transport package of the invention employs a buffer sheet of an innovative structure, and the buffer sheet is divided into adsorption zones, and non-adsorption zones. The surface grains of the adsorption zones are of a close pore structure, and the surface grains of the non-adsorption zones are partially or fully of an open pore structure. Because the surface of the adsorption zones of the buffer sheet is still of a closed surface grain structure, the chuck adsorption capacity is not affected. The surface grains of the non-adsorption zones of the buffer sheet are fully or partially opened, to form an open surface grain structure. The open pore structure enables the outside air and the air between the buffer sheet and the glass plates to freely flow, namely the outside air can quickly enter between the buffer sheet and the glass plates from the periphery of the buffer sheet. Thus, the problem of vacuum adsorption between the buffer sheet and the glass plates is solved, sheets are easily and successfully taken out, the phenomenon that the sheets are stuck and broken is better eliminated, and the time for taking sheets is greatly saved. 
     The buffer sheet of the invention is divided into adsorption zones and non-adsorption zones, and the non-adsorption zones are provided with through hole(s); thus, the problem of vacuum adsorption between the buffer sheet and the glass plates can also be solved. The outside air can quickly enter between the buffer sheet and the glass plates from the edges of the through hole(s), thereby preventing the problem of vacuum adsorption. 
    
    
     
       BRIEF DESCRIPTION OF FIGURES 
         FIG. 1  is a schematic diagram of glass plates arranged in a packaging container in the prior art; 
         FIG. 2  is a structure diagram of a buffer sheet in the prior art; 
         FIG. 3  is a structure diagram of a buffer sheet of a first example of the invention; 
         FIG. 4  is a structure diagram of a buffer sheet of a second example of the invention; 
         FIG. 5  is a sectional diagram of a non-adsorption zone of a buffer sheet shown in  FIG. 4 ; 
         FIG. 6  is a sectional diagram of a non-adsorption zone of a third example of a buffer sheet of the invention; 
         FIG. 7  is a structure diagram of a fourth example of a buffer sheet of the invention; and 
         FIG. 8  is a structure diagram of a fifth example of a buffer sheet of the invention. 
     
    
    
     Legends:  1 . glass plate;  2 . buffer sheet;  21 . substrate;  22 . surface grain;  23 . adsorption zone;  24 . non-adsorption zone;  25 . through hole. 
     DETAILED DESCRIPTION 
     The invention provides a liquid crystal glass transport package, comprising glass plates, and a buffer sheet; the buffer sheet is arranged between two adjacent glass plates. The liquid crystal glass transport package of the invention employs a buffer sheet of an innovative structure.  FIG. 3  shows a first example of the buffer sheet of the invention. The buffer sheet comprises a substrate, and surface grains protruding from the substrate; the buffer sheet comprises adsorption zones  23 , and non-adsorption zones  24 ; the surface grains of the adsorption zones  23  are of a close pore structure, and the surface grains of the non-adsorption zones  24  are partially of an open pore structure for avoiding generating negative pressure. The surface of the substrate is airtight. In the example, the non-adsorption zones  24  are positioned in the middle of the buffer sheet, and the adsorption zones  23  are positioned at both ends of the buffer sheet. The surface grains of the adsorption zones  23  are in a shape of diamond grids, and the surface grains of the non-adsorption zones  24  are in a shape of crescent grids which are separately arranged. The crescent grids are closed, but the zones among the crescent grids are opened. The open pore structure of the surface grains of the non-adsorption zone  24  is provided with open paths facing all the four edges of the buffer sheet. Air is supplemented to the surface grains of the non-adsorption zones  24  from four directions, and then the problem of vacuum adsorption is effectively solved. 
     The buffer sheet is divided into adsorption zones  23  and non-adsorption zones  24 ; the surface grains of the adsorption zones  23  are of a close pore structure, and the surface grains of the non-adsorption zones  24  are partially of an open pore structure. Because the surface of the adsorption zones  23  of the buffer sheet is still of a closed surface grain structure, the chuck adsorption capacity is not affected. The surface grains of the non-adsorption zones  24  of the buffer sheet are fully or partially opened, to form an open surface grain structure. The open pore structure enables the outside air and the air between the buffer sheet and the glass plates to freely flow, namely, the outside air can quickly enter between the buffer sheet and the glass plates from the periphery of the buffer sheet. Thus, the problem of vacuum adsorption between the buffer sheet and the glass plates is solved, sheets are easily and successfully taken out, the phenomenon that the sheets are stuck and broken is better eliminated, and the time for taking sheets is greatly saved. 
       FIG. 4  and  FIG. 5  show a second example of the buffer sheet. The buffer sheet comprises a substrate  21 , and surface grains  22  protruding from the substrate  21 ; the surface grains  22  of the non-adsorption zones  24  are in a shape of strip-shaped broken lines, and the surface grains do not form the shape of grids. Thus, all the non-adsorption zones are of an open structure, and air freely enters the non-adsorption zones. The heights of the surface grains  22  of the non-adsorption zones  24  are consonant. Optionally, the heights of the surface grains  22  of the non-adsorption zones  24  can be inconsistent. The stepped buffer structure has better buffer effect. Specifically,  FIG. 6  shows a third example, and different heights of the surface grains can further widen the air inlet/outlet passage, thereby more effectively preventing vacuum adsorption. In the example, the open pore structure of the surface grains of the non-adsorption zones  24  is provided with open paths only facing the two parallel edges of the buffer sheet. Air is supplemented from two directions, and better effect is able to be obtained because the air complementing paths are direct and short. 
       FIG. 7  shows a fourth example of the buffer sheet of the invention. The buffer sheet comprises a substrate; the buffer sheet comprises adsorption zones  23 , and non-adsorption zones  24 ; the non-adsorption zones  24  are provided with a through hole  25 . In the example, the non-adsorption zones  24  are positioned in the middle of the buffer sheet, and the adsorption zones  23  are positioned at both ends of the buffer sheet. The number of the through hole  25  is one, the area thereof is large, and the shape thereof is rectangle. 
     The buffer sheet of the invention is divided into adsorption zones  23  and non-adsorption zones  24 , and the non-adsorption zones  24  are provided with through hole(s)  25 ; thus, the problem of vacuum adsorption between the buffer sheet and the glass plates can be solved as well. The outside air can quickly enter between the buffer sheet and the glass plates from the edges of the through hole(s)  25 , thereby preventing the problem of vacuum adsorption. 
     In the example, the substrate of the adsorption zones is further provided with surface grains protruding from the substrate; the surface grains of the adsorption zones  23  are of a close pore structure, to facilitate chuck adsorption. 
     In the example, the non-adsorption zones are provided surface grains or are not provided with surface grains. When the non-adsorption zones are provided surface grains, the surface grains of the non-adsorption zones are partially or fully of an open pore structure. The heights of the surface grains of the non-adsorption zones can be consonant or inconsistent. The function of the open pore structure of the surface grains in the example is the same as that of the open pore structure in the above example, and the example will not give unnecessary details. 
       FIG. 8  shows a fifth example of the buffer sheet of the invention, and the fifth example is different from the seventh example in that: the number of the through holes  25  is multiple. The through holes  25  are in multiple rows and lines, and are in round shape. Optionally, the through holes  25  can be in other shapes. The functions of the through holes  25  are the same as those in the seventh example, and the example will not give unnecessary details. 
     The invention is described in detail in accordance with the above contents with the specific preferred examples. However, this invention is not limited to the specific examples. For the ordinary technical personnel of the technical field of the invention, on the premise of keeping the conception of the invention, the technical personnel can also make simple deductions or replacements, and all of which should be considered to belong to the protection scope of the invention.