JP2016196097A - Sheet body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet body and member, capable of exhibiting a constant buffer and/or a thermal insulation effect.SOLUTION: The sheet body used for buffer and/or the suppression of heat transfer comprises a first film receiving heat to expand and contract and a second film having thermal extension/contraction properties different from those of the first film. The first and second films are mutually bonded in a bonding region, and a communication passage allowing air circulation is formed in a non-bonding region between the bonding regions. The member for buffer or/and thermal insulation includes the first film contracted by heating the sheet body until reaching a predetermined deformation induced temperature by heating means as compared with before the heating.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sheet body and a member used for packaging and the like.

  Conventionally, various articles are packaged with a film having heat shrinkability (see, for example, Non-Patent Document 1).

  However, simply using such a film has poor buffering action and heat insulating action, so it is necessary to separately arrange a buffer sheet such as a bubble sheet in parallel.

“Toyobo Website”, [online], [searched on December 18, 2014], Internet (URL: http://www.toyobo.co.jp/seihin/film/package/list/productlist.html)

  The present invention has been made paying attention to the above circumstances, and is to provide at least a sheet body and a member capable of exhibiting a certain buffer and / or heat insulating action.

  That is, the present invention has the following configuration.

  The sheet body according to claim 1 is used for buffering and / or suppressing heat transfer, and includes a first film that expands and contracts by receiving heat, and the first film and thermal expansion and contraction. A second film having different characteristics, and the first and second films are bonded to each other in the bonding region, and a communication path through which air can flow is formed in the non-bonding region between the bonding regions. Is.

  The sheet body according to claim 2 is used for buffering and / or suppressing heat transfer, and a first film that expands and contracts by receiving heat, and the first film and thermal expansion and contraction. A second film having different characteristics, and the first and second films are joined to each other in a patterned adhesion region, and a communication path through which air can flow in a non-adhesion region between the adhesion regions. A sheet body that is formed and is formed by sequentially winding the first and second films after being joined to each other, wherein the communication path is continuous toward the upstream side in the winding process. However, it is formed to be opened to the outside.

  According to a third aspect of the present invention, in the configuration of the second aspect, the sheet body is a belt-shaped member in which the adhesion region is inclined with respect to the sheet flow direction in the winding process, and the communication path is the sheet flow. It is a straight line inclined with respect to the direction.

  According to a fourth aspect of the present invention, in the configuration according to the first, second, or third aspect, the first film is contracted by being heated until the first film reaches a predetermined deformation inducing temperature. The second film does not shrink more than the first film at the deformation inducing temperature.

  According to a fifth aspect of the present invention, in the configuration according to the first, second, third, or fourth aspect, the sheet body is contracted mainly in a uniaxial direction by being heated until the first film reaches a predetermined deformation inducing temperature. Is.

According to a sixth aspect of the present invention, in the configuration according to the first, second, third, or fourth aspect, the first film contracts in the biaxial direction by being heated until the first film reaches a predetermined deformation inducing temperature. The sheet body according to claim 7, wherein the bonding region is a lump in the configuration according to claim 1, 2, 3, 4, 5, or 6, and the communication path includes the bonding members. A zigzag shape formed between the regions.

  The sheet body according to claim 8 is the structure according to claim 1, 2, 3, 4, 5, 6 or 7, by coating a part or all of the article, and then heated by a heating means, At least, the first film can be contracted.

  The sheet body according to claim 9 is the structure according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the sheet body is formed in a cylindrical shape capable of supporting an outer portion of the beverage container, and is a heating means. At least the first film can be contracted by the heat of the beverage container.

  According to a tenth aspect of the present invention, the sheet body according to any one of the first to ninth aspects is heated by the heating means until the predetermined deformation inducing temperature is reached, whereby the first contracted as compared to before the heating. It is for buffering and / or heat insulation provided with one film.

  The sheet body according to claim 11 is used for buffering and / or suppressing heat transfer, and includes a first sheet member that expands and contracts by receiving heat, and the first sheet member. A second sheet member having different thermal expansion and contraction characteristics, and the first and second sheet members are bonded to each other in the bonding region, and a communication path through which air can flow in the non-bonding region between the bonding regions. Is formed.

  According to a twelfth aspect of the present invention, in the configuration according to the eleventh aspect, the first sheet member is a film that expands and contracts by receiving heat, and the second sheet member has a heat shrink characteristic with the film. Is a different sheet.

  Here, “film” refers to those having a thickness dimension of less than 250 μm, and “sheet” refers to those having a thickness dimension of 250 μm or more. The “sheet member” is a concept including these films and sheets. The “sheet body” is a concept different from the “sheet”.

  As described above, according to the present invention, it is possible to provide at least a sheet body and a member that can exhibit a certain buffering and / or heat insulating action.

The schematic diagram for demonstrating the manufacturing process of this invention. The top view of the sheet body in the embodiment. AA line sectional view in FIG. The end elevation for demonstrating an example of the sheet | seat body (member) after being heated. The X direction arrow directional view in FIG. The X direction arrow directional view in FIG. The top view which shows the sheet | seat body which is other embodiment. The top view which shows the sheet | seat body which is other embodiment. The top view which shows the sheet | seat body which is other embodiment. The top view which shows the sheet | seat body which is other embodiment. The top view which shows the sheet | seat body which is other embodiment. The top view which shows the sheet | seat body which is other embodiment. BB sectional drawing in FIG. The end elevation for demonstrating an example of the sheet | seat body (member) after being heated.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 3 and 4 are a schematic cross-sectional view and an end view of the sheet body C, but show exaggerated thickness dimensions for the sake of visibility and convenience of explanation.

  The sheet body C is used for buffering or is used for so-called heat insulation for suppressing heat transfer.

  The sheet body C includes a first film 1 that is a sheet member that expands and contracts by receiving heat, and a second film 2 that is a sheet member having a different thermal expansion / contraction characteristic from the first film 1. These first and second films 1 and 2 are bonded to each other in the bonding region 3. A communication path 5 through which air can flow is formed in the non-adhesion area 4 between the plurality of adhesion areas 3.

  In this embodiment, the first and second films 1 and 2 are joined to each other in the patterned adhesion region 3. The sheet body C is formed by sequentially winding the first and second films 1 and 2 after being joined to each other through the winding step S4, and the communication path 5 is located upstream in the winding step S4. It is formed to be continuous and open to the outside.

  The first film 1 is contracted by being heated by various heating means (not shown) until a predetermined deformation inducing temperature is reached. In this embodiment, the first film 1 is contracted mainly in a uniaxial direction by being heated by a heating means until a predetermined deformation inducing temperature is reached.

  More specifically, the first film 1 is made of polyethylene terephthalate (PET), and a film made by Toyobo Co., Ltd., whose thickness dimension is set to 9 to 30 μm is used. The deformation inducing temperature of the first film 1 is set to 60 ° to 100 °, and can be contracted by 40 to 60% in the uniaxial direction by being heated by the heating means until reaching the deformation inducing temperature. .

  The second film 2 does not shrink than the first film 1 at the deformation-inducing temperature, or has a lower degree of shrinkage than the first film 1. More specifically, the second film 2 is made of unstretched polypropylene film (CPP) or linear polyethylene (L-LDPE), and has a thickness dimension set to 30 to 100 μm. A company-made one is used.

  The adhesion region 3 is formed by applying an adhesive g to the inner surface side of the first film 1 and is in a band shape inclined with respect to the sheet flow direction F in the winding step S4 in plan view. Is. Between the first and second films 1 and 2, adhesive regions 3 are formed at a plurality of locations. More specifically, the adhesive region 3 has a width dimension set to 3 mm to 5 mm in a plan view, and more preferably set to 5 mm. Moreover, the non-adhesion area | region 4 formed between the adjacent adhesion | attachment area | regions 3 is set to about 8 mm. In addition, as the adhesive g that forms the adhesive region 3, a polyester-based adhesive g is used. In FIG. 3, the exaggerated dimension in the thickness direction is shown for convenience of grasping, but the actual thickness of the adhesive g layer in the bonding region 3 is set to about 2 to 4 μm, for example. Has been.

  Each non-bonding region 4 formed between the bonding regions 3 forms a communication path 5 that allows a slight remaining air a to flow therethrough. Each of the communication passages 5 is a straight line inclined with respect to the sheet flow direction F in plan view, and is continuous and opened to the upstream side in the winding step S4. One end of each communication path 5, that is, one end located on the upstream side in the winding step S <b> 4 is open to the outside at the side edge of the first and second films 1 and 2.

  Next, a manufacturing process of the sheet body C will be schematically described.

  The sheet body C is continuously manufactured through the feeding step S1, the adhesive application step S2, and the bonding step S3, and is shipped in a state of being wound around the core material J in the winding step S4. The

  In the feeding step S1, the first film 1 is sequentially fed from the original fabric A, and the second film 2 is sequentially fed from the original fabric B.

  Adhesive application process S2 includes the process of apply | coating the adhesive g to pattern form using the transfer roll R1 which is an adhesive transfer means on the one surface of the 1st film 1 drawn | fed out from the original fabric A. As shown in FIG.

  In the bonding step S3, the first film 1 coated with the adhesive g through the adhesive coating step S2 and the second film 2 fed out from the original fabric B form a pair as a clamping means. The first and second films 1 and 2 are joined via an adhesive g by being sandwiched between pressure rolls P1 and P2.

  In the winding step S4, the first and second films 1 and 2 that pass through the pressure rolls P1 and P2 and are bonded to each other are sequentially wound around the core material J by winding means (not shown). Yes, a constant tension can be applied to the first and second films 1 and 2 by controlling the winding speed.

  In the winding step S4, the air a interposed between the first and second films 1 and 2 immediately after the bonding step S3 is excluded to the outside. That is, the winding process S4 also serves as an air discharge process for discharging the air a interposed between the films 1 and 2 to the outside. That is, when winding around the core material J while applying tension to the first and second films 1 and 2, as shown in FIG. 1 and FIG. In addition, a pressing force in a direction in which the second films 1 and 2 are brought into close contact with each other acts. The air a remaining in the non-bonded region 4 is sequentially squeezed by the pressure contact force and moves in the communication path 5 and finally discharged from one end of the communication path 5 to the outside. In other words, the air a remaining in the non-bonding region 4 is pushed upstream in the communication path 5 in the winding step S4 and is not easily caught in the core material J. The sheet body C is in a state of being shipped as a sheet roll Y after a certain length is wound around the core material J.

  The sheet body C produced as described above is heated to a predetermined deformation-inducing temperature by the heating means, and can change into a shape as a member, that is, a cushioning material and / or a heat insulating material. Yes. As a heating means for heating the sheet body C to obtain a member, for example, the sheet body C is passed through a tunnel-shaped heating furnace, and the sheet body C is subjected to a heat treatment at a predetermined set temperature. There are things that touch a heated liquid such as hot water. Any heating means may be used as long as it can heat the sheet C to a predetermined deformation-inducing temperature.

  In this embodiment, when the sheet body C undergoes heat treatment, the first film 1 is reduced by about 30 to 50% along the uniaxial direction, that is, the sheet flow direction F, while the second film 2 is hardly reduced. It is like that. As a result, as shown in FIG. 4, the first film 1 is maintained in a flat state and the second film 2 bends so as to meander in the thickness direction particularly in a portion located in the non-adhesive region 4, as if The member K has a three-dimensional structure such as a bubble sheet or cardboard.

  The sheet body C is heated to a predetermined temperature by a heating means and can be transformed into a member used for various applications. Examples are as follows.

  For example, the sheet C is coated on the product itself or a part or all of various articles such as a storage container in which the product is stored, and then the sheet C is heated to a predetermined deformation inducing temperature by a heating unit. There is at least an embodiment in which the first film can shrink.

  In this way, the member K obtained by heating the sheet body C makes it difficult for goods and the like to move at the time of delivery, and can form a stably supported state, and is constant like a bubble sheet. It plays a role as a packing material that can exhibit the buffer function.

  As another example, as shown in FIG. 11, for example, there is a sheet body C formed in a cylindrical shape that can support the outer portion of the beverage container 7.

  The cylindrical sheet C is set so that at least the first film 1 can be contracted by the heat of the beverage container 7 in which a hot drink is put. The sheet body C formed into a cylindrical shape has a certain amount of shrinkage of the first film 1 and a large gap in the non-adhesion area between the adhesion areas between the first and second films 1 and 2. A member K capable of exhibiting a heat insulating function, that is, a so-called cup holder can be formed. It should be noted that the cylindrical sheet body C may be preliminarily heated to a predetermined deformation-inducing temperature before being attached to the beverage container 7 to form a member K, that is, a cup holder. is there.

  As described above, the sheet body C is heated by the heating means until reaching a predetermined deformation inducing temperature, thereby being provided with a buffer or / and comprising the first film contracted compared to before the heating. A heat insulating member K can be formed.

  The sheet body C according to the present embodiment is used for buffering and / or suppressing heat transfer, and the first film 1 as a sheet member that expands and contracts by receiving heat, and the first film 1 The film 1 and the second film 2 which is a sheet member having different thermal expansion / contraction characteristics are provided, and the first and second films 1 and 2 are bonded to each other in a plurality of bonding regions 3. A communication passage 5 through which air can flow is formed in the non-bonding region 4. For this reason, the sheet | seat body C which can exhibit a fixed buffer and / or heat insulation effect can be provided.

  The sheet body C includes a first film 1 that expands and contracts by receiving heat, and a second film 2 that is different from the first film 1 in thermal expansion and contraction characteristics. Are connected to each other in the patterned adhesive region 3, and a communication passage 5 through which air can flow is formed in the non-adhesive region 4 between the adhesive regions 3, and the first, The second films 1 and 2 are sequentially made through the winding process S4. And the said communication path 5 of this sheet | seat body C is formed so that it may continue toward the upstream in the said winding process S4, and it may open | release outside. For this reason, it is possible to provide the sheet body C that can exhibit a certain buffering effect and is easily wound efficiently so as to be stored and transported.

  That is, since the communication path 5 is formed so as to be continuous toward the upstream side in the winding process S4 and open to the outside, the communication path 5 exists in the communication path 5 in the winding process S4 that also serves as an air discharge process. The air a can be discharged outside without staying. For this reason, the sheet body C is wound around the core material J with an extremely small amount of air a remaining inside, and can effectively suppress the inefficiency of the winding amount due to the presence of the air a. It has become.

  The first film 1 is shrunk by being heated until reaching a predetermined deformation inducing temperature, and the second film 2 is not shrunk more than the first film 1 at the deformation inducing temperature. Is. For this reason, the function as a buffer material can be suitably exhibited by bending so that the 2nd film 2 may make a three-dimensional shape through heat processing.

  Since the first film 1 is contracted mainly in a uniaxial direction by being heated until reaching a predetermined deformation-inducing temperature, the desired shape can be easily realized through the heat treatment.

  The adhesive region 3 is a belt-like shape inclined with respect to the sheet flow direction F in the winding step S4, and the communication path 5 is a linear shape inclined with respect to the sheet flow direction F. In the winding step S4, the air in the communication path 5 can be suitably discharged to the outside.

  The present invention is not limited to the embodiment described in detail above.

  Various shapes can be applied to the shape of the bonding region and the pattern formed by the plurality of bonding regions, and the pattern is not limited to that shown in the present embodiment.

  The adhesion region does not necessarily have to be patterned, and may be irregular. The bonding region may be an aspect that allows air from the outside to flow with respect to the non-bonding region.

  For example, as shown in FIG. 6, the adhesive region 3 may be configured by a plurality of strips extending in the left-right direction and formed with a horizontal stripe pattern. Further, as shown in FIG. 7, the bonding region 3 may be configured by a plurality of horizontally long ellipses. Moreover, as shown in FIG. 8, the adhesion area | region 3 may be comprised by the 1st adhesion area | region which makes a some rectangular shape, and the 2nd adhesion area | region which makes a some square shape. Further, as shown in FIG. 9, the bonding region 3 includes a plurality of circular first bonding regions and a plurality of semicircular arcs so as to surround the circular first bonding region. It may be constituted by the adhesive region. Further, as shown in FIG. 10, the bonding region 3 may be configured by arranging X-shaped shapes at a plurality of intervals. In addition, the thing of various aspects can be employ | adopted for the adhesion | attachment area | region 3. FIG.

  In the above-described embodiment, the winding process has been described as serving also as an air discharge process for discharging the air interposed between the first and second films to the outside. It is not limited to things. That is, an air discharge process may be provided separately from the winding process.

  In the above-described embodiment, the first film is contracted in the position axis direction, but is not limited to this. That is, the first film and / or the second film may be contracted in the biaxial direction by being heated until reaching a predetermined use temperature.

  In the above-described embodiment, the adhesive region is shown as a belt-like shape inclined with respect to the sheet flow direction in the winding process in a plan view, but is not limited to this. For example, the adhesion region may be a block shape, and the communication path may be a zigzag shape formed between the adhesion regions. Even in such a case, the second film undergoes heat treatment to form a three-dimensional shape, and the intended purpose can be exhibited.

  Moreover, the thing of the adhesive agent which adhere | attaches 1st, 2nd films and adhesive force can select various things. That is, the adhesive may be one that can adhere strongly to such an extent that the first and second films cannot move relative to each other, and the first film and the second film partially move relative to each other. It may be weak enough to bond.

  The sheet member may be a member to which a film having a thickness dimension larger than that of the sheet is applied, or a sheet member having a thickness dimension smaller than that of the film may be applied. That is, the sheet body has different deformation characteristics, that is, contraction characteristics when it receives a predetermined heat of the sheet member on one side, and deformation characteristics, that is, contraction characteristics when it receives a predetermined heat of the sheet member on the other side. One sheet member and the other sheet member may each be a film, one sheet member and the other sheet member may each be a sheet, and one sheet member may be a film and the other sheet member. May be a sheet.

  Here, “film” refers to those having a thickness dimension of less than 250 μm, and “sheet” refers to those having a thickness dimension of 250 μm or more. The “sheet member” is a concept including these films and sheets. The “sheet body” is a concept different from the “sheet”.

  In FIGS. 12, 13, and 14, the first sheet member is a film 1 that expands and contracts by receiving heat, and the second sheet member is a sheet 2 that is different from the film 1 in heat shrinkage characteristics. The body C and the member K are shown. Here, FIGS. 12 and 13 show the sheet body C that is in a state before being heated by a heating means (not shown) until the predetermined deformation inducing temperature is reached, and FIG. 14 shows the sheet body C shown in FIGS. FIG. 2 schematically shows a state after C is heated until reaching a predetermined deformation inducing temperature. That is, what is shown in FIG. 14 is an outline of the member K obtained by heating the sheet body C, that is, the buffering member and the heat insulating member K obtained by heating the sheet body C until the predetermined deformation inducing temperature is reached. A typical end view is shown. 13 and 14 are a schematic cross-sectional view and an end view of the sheet body C and the member K, but the thickness dimensions are exaggerated for ease of viewing and explanation.

  The film 1 has the same characteristics as the first film 1 described with reference to FIGS. That is, the film 1 can be shrunk by being heated by various heating means (not shown) until a predetermined deformation inducing temperature is reached. In this embodiment, the film 1 is contracted mainly in the uniaxial direction by being heated by a heating means until a predetermined deformation inducing temperature is reached. In addition, the “uniaxial direction” that is the shrinking direction of the film 1 is the same direction as the flow direction F at the time of manufacturing the film 1.

  In this embodiment, the film 1 is made of polyethylene terephthalate (PET), and a film made by Toyobo Co., Ltd., whose thickness dimension is set to 9 to 30 μm is used. The deformation inducing temperature of the film 1 is set to 60 ° to 100 °, and can be contracted by 40 to 60% in the uniaxial direction by being heated by the heating means until the deformation inducing temperature is reached.

  The sheet 2 is a polyethylene foam sheet having a thickness dimension set in a range of about 500 μm to 1000 μm, and has a heat shrinkage characteristic different from that of the film 1. In this embodiment, the sheet 2 hardly contracts at a predetermined deformation inducing temperature at which the film 1 can contract. The sheet 2 may be an open cell body or a closed cell body. In this embodiment, the sheet 2 is a non-crosslinked highly foamed polyethylene sheet which is a closed cell body, and a product made by Sekisui Plastics Co., Ltd. having a thickness dimension of about 500 μm is used.

  The sheet body C includes a film 1 that is a sheet member that expands and contracts by receiving heat, and a sheet 2 that is a sheet member having different thermal expansion and contraction characteristics from the film 1. The film 1 and the sheet 2 are bonded to each other in a plurality of bonded regions 3, and a communication path 5 through which air can flow is formed in a non-bonded region 4 between the bonded regions 3. As shown in FIG. 12, the sheet body C has a belt-like shape extending in the left-right direction in which the bonding region 3 is a direction substantially orthogonal to the flow direction F. And the sheet | seat body C is provided with two or more strip | belt-shaped adhesion | attachment area | regions 3. FIG. In the sheet body C, a plurality of adhesive regions 3 are arranged in parallel along the flow direction F, and as a whole, a horizontal stripe pattern is formed.

  The sheet body C can exhibit a certain buffering and / or heat insulating action. That is, the sheet body C can be changed to the shape of the member K, that is, the cushioning material and / or the heat insulating material by being heated to a predetermined deformation inducing temperature by the heating means. Any heating means may be used as long as it can heat the sheet C to a predetermined deformation-inducing temperature.

  In this embodiment, when the sheet C undergoes heat treatment, the film 1 contracts by about 30 to 50% along the uniaxial direction, that is, the flow direction F of the film 1 at the time of manufacture, while the sheet 2 hardly contracts. It is like that.

  In a state where the sheet 2 is heated by the heating means, the sheet 2 becomes softer and more flexible than before heating. For this reason, in the heated state, the elastic repulsive force of the sheet 2 temporarily attenuates, and preferably follows the film 1 that shrinks in the uniaxial direction. As a result, as shown in FIG. In addition, a corrugated side view shape can be formed. The sheet 2 that has finished being heated by the heating means is exposed to a lower temperature environment than the heated state, and is cured and maintained in a deformed state as compared to the heated state. Will be.

  As a result, as shown in FIG. 13, the film 1 maintains a flat state due to shrinkage, and the sheet 2 bends so as to form a corrugation in the thickness direction particularly in a portion located in the non-adhesive region 4, as if a bubble sheet. Or a member K having a three-dimensional structure such as cardboard.

  As described above, the intended objects can be achieved also in the embodiments shown in FIGS. Of course, the sheet is not limited to that described in the above-described embodiment.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

C ... Sheet body 1 ... First film, film (first sheet member)
2 ... Second film, sheet (second sheet member)
3 ... Adhesion area 4 ... Non-adhesion area 5 ... Communication path S4 ... Winding process

Claims (12)

Used for buffering and / or suppressing heat transfer,
A first film that expands and contracts in response to heat, and a second film that has different thermal expansion and contraction properties from the first film, and the first and second films are bonded to each other in the adhesive region; A sheet body in which a communication path through which air can flow is formed in a non-bonded region between bonded regions. Used for buffering and / or suppressing heat transfer,
A first film that expands and contracts by receiving heat, and a second film that has a different thermal expansion and contraction characteristic from the first film, and the first and second films are mutually connected in a patterned adhesive region. A sheet body that is joined and formed with a communication path through which air can flow in a non-bonded area between the bonded areas, and that is made by sequentially winding the first and second films after being bonded to each other. Because
The sheet | seat body currently formed so that the said communicating path may continue toward the upstream in the said winding process, and it may open | release outside. 3. The sheet according to claim 2, wherein the adhesion region is a belt-like shape inclined with respect to the sheet flow direction in the winding step, and the communication path is a linear shape inclined with respect to the sheet flow direction. body. The first film shrinks when heated until reaching a predetermined deformation inducing temperature, and the second film does not shrink more than the first film at the deformation inducing temperature. The sheet body according to claim 1, 2 or 3. The sheet body according to claim 1, 2, 3, or 4, wherein the first film is contracted mainly in a uniaxial direction by being heated until reaching a predetermined deformation inducing temperature. The sheet body according to claim 1, 2, 3, or 4, wherein the first film shrinks in a biaxial direction by being heated until reaching a predetermined deformation-inducing temperature. The sheet body according to claim 1, 2, 3, 4, 5 or 6, wherein the adhesion region is a lump-like one, and the communication path is a zigzag shape formed between the adhesion regions. The first, second, third, fourth, fifth, and sixth structures are configured such that at least the first film can be contracted by being heated by a heating means after covering a part or all of the article. Or the sheet | seat body of 7. It is formed in the cylinder shape which can support the outer side part of a drink container, and it is comprised so that at least said 1st film can shrink | contract with the heat | fever of the said drink container. The sheet body according to 6 or 7. The sheet body according to any one of claims 1 to 9, wherein the sheet body includes the first film contracted as compared with before the heating by being heated by a heating unit until a predetermined deformation inducing temperature is reached. And / or a member for heat insulation. Used for buffering and / or suppressing heat transfer,
A first sheet member that expands and contracts in response to heat, and a second sheet member that has different thermal expansion and contraction characteristics from the first sheet member, and the first and second sheet members are mutually connected in the bonding region. A sheet body that is joined and formed with a communication path through which air can flow in a non-bonded region between the bonded regions. The sheet body according to claim 11, wherein the first sheet member is a film that expands and contracts by receiving heat, and the second sheet member is a sheet having a heat shrinkage characteristic different from that of the film.

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