JP2009248306A - Laminated sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve strength and durability of a product using a laminated sheet. <P>SOLUTION: The laminated sheet 10 comprises a base layer 12 which can not be heat-cut by a high-frequency welder, a top layer 14 which can be heat-cut by the high-frequency welder, and a foaming layer 18 formed by heating a sheet 16 containing foaming agent held between the base layer 12 and the top layer 14, and the laminated sheet 10 is formed by removing the base layer 12 from the foaming layer 18. The foaming layer 18 contains fine fibers of 0.1 to 3 mm in length, serving as raw material of nonwoven fabric. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a laminated sheet used for book bindings, binders, notebooks or diary covers, bags or bags.

  Conventionally, laminated sheets used for book bindings, binders, notebooks or diary covers, bags or bags are formed as follows. That is, first, a base layer made of rayon, nylon, polyethylene, acrylic cloth or non-woven fabric and a high-frequency welder can be burned out, and the surface is printed with letters or patterns, or wrinkles are formed. A sheet-like member comprising a top layer that has been subjected to various processing such as being coated with a treatment agent, and a sheet containing a foaming agent sandwiched between the base layer and the top layer and thermocompression-bonded with the top layer. Form. Next, the sheet-like member is heat-treated to foam the foam-containing sheet. Thereby, a foamed sheet member having a structure in which the foamed layer is sandwiched between the base layer and the top layer is formed. Thereafter, a laminated sheet is formed by cutting the base layer from the foamed layer. The laminated sheet formed in this manner is cut into a predetermined shape by a welder, and paper or cloth is attached to the foamed layer with an adhesive, which is used for book covers, notebook covers, and the like.

  However, in the conventional laminated sheet, a base layer is required until the foaming agent-containing sheet is heated to form a foamed layer. However, since the base layer is made of cloth or non-woven fabric, it cannot be cut with a welder. For this reason, the base layer is cut in the surface direction when the foam sheet member is formed. However, if the base layer is cut off, the strength is weakened, and there is a problem that fine cracks are generated over time particularly in a bent portion where stress is likely to concentrate.

  This invention is made | formed in view of this subject, and it aims at providing the laminated sheet which improved the intensity | strength and durability of the product using a laminated sheet, and suppressed generation | occurrence | production of the crack.

In order to achieve the above object, the invention according to claim 1 of the present invention includes a base layer that cannot be burned out by a high frequency welder, a top layer that can be burned out by a high frequency welder, the base layer, and the top layer. A laminated sheet formed by heating a sheet containing a foaming agent sandwiched between and formed by cutting the base layer from the foamed layer,
The foam layer contains fine fibers having a length of 0.1 to 3 mm which are raw materials for the nonwoven fabric.

The invention according to claim 2 is a foam layer formed by heating a peelable base layer, a top layer burnable by a high frequency welder, and a foam-containing sheet sandwiched between the base layer and the top layer. In a laminated sheet formed by peeling the base layer from the foamed layer,
The foamed layer contains fine fibers having a length of 0.1 to 3 mm which are raw materials for the nonwoven fabric.

  The invention according to claim 3 is characterized in that the fine fiber according to claim 1 or 2 is carbon fiber, urethane resin or thermoplastic resin.

  According to a fourth aspect of the present invention, there is provided a base layer that cannot be burned out by a high frequency welder, an intermediate layer that can be burned out by a high frequency welder, and a top layer that is provided on the intermediate layer and can be burned out by a high frequency welder. The foam layer is formed by heating a sheet containing a foaming agent sandwiched between the base layer and the intermediate layer, and is formed by cutting the base layer from the foam layer.

  According to a fifth aspect of the present invention, there is provided a peelable base layer, an intermediate layer that can be burned out by a high frequency welder, a top layer provided on the intermediate layer and burnable by a high frequency welder, the base layer, and the intermediate layer And a foamed layer formed by heating a sheet containing a foaming agent sandwiched between the layers. The base layer is peeled off from the foamed layer.

  The invention according to claim 6 is characterized in that the intermediate layer according to claim 4 or 5 is a non-woven fabric that can be burned out by a high-frequency welder, or a synthetic resin.

  The invention according to claim 7 is characterized in that the base layer according to any one of claims 1, 3, 4 and 6 is a cloth or a non-woven fabric.

  The invention according to claim 8 is characterized in that the base layer according to any one of claims 2, 3, 5 or 6 is a net made of aluminum or tetron.

  According to the first aspect of the present invention, since the strength of the foam layer is increased by adding fine fibers to the foam layer, the strength and durability of the laminated sheet can be improved even if the base layer is removed from the foam layer. And the generation of cracks can be suppressed.

  According to invention of Claim 2, since the intensity | strength of a foam layer increases by making a foam layer contain a fine fiber, even if it peels a base layer from a foam layer, the intensity | strength and durability of a laminated sheet can be improved. And the generation of cracks can be suppressed.

  According to invention of Claim 3, the intensity | strength and durability of a foamed layer can be improved by using carbon fiber, a urethane-type resin, or a thermoplastic resin as a fine fiber contained in a foamed layer.

  According to the invention of claim 4, by providing the intermediate layer between the top layer and the foam layer, the strength and durability of the laminated sheet can be improved even when the base layer is cut from the foam layer, Can be suppressed. Further, since the intermediate layer is made of a material that can be burned out by the high frequency welder, the intermediate layer can be processed by the high frequency welder, and the productivity is not lowered.

  According to the invention of claim 5, by providing the intermediate layer between the top layer and the foam layer, the strength and durability of the laminated sheet can be improved even if the base layer is peeled off from the foam layer, Can be suppressed. Further, since the intermediate layer is made of a material that can be burned out by the high frequency welder, the intermediate layer can be processed by the high frequency welder, and the productivity is not lowered.

  According to the invention described in claim 6, the intermediate layer can be processed by the high frequency welder by using a nonwoven fabric or a synthetic resin that can be burned out by the high frequency welder.

  According to invention of Claim 7, a base layer can be easily excised from a foamed layer by making a base layer into cloth or a nonwoven fabric.

  According to invention of Claim 8, a base layer can be easily peeled from a foaming layer by making a base layer into the net made from aluminum or a Tetron.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1A and 1B are cross-sectional views of the laminated sheet 10 according to the first embodiment of the present invention, in which FIG. 1A shows a state before foaming, FIG. 1B shows a state after foaming, and FIG. ) Shows a state in which the base layer is cut from the foam layer.

  The laminated sheet 10 includes a base layer 12, a top layer 14, and a foam layer 18 formed by heating a foam-containing sheet 16 sandwiched between the base layer 12 and the top layer 14. The base layer 12 is made of cloth or non-woven fabric, and has a thickness of 0.1 to 0.3 mm, preferably 0.2 mm. The top layer 14 is made of polyvinyl chloride and has a thickness of 0.1 to 0.3 mm, preferably 0.15 mm. The foaming agent-containing sheet 16 is made of a mixture of polyvinyl chloride and a fine fiber having a length of 0.1 to 3 mm, which is a raw material for the foaming agent and the nonwoven fabric. The fine fiber may be carbon fiber, urethane resin or thermoplastic. Resin is used. The thickness of the foamed sheet 16 is 0.25 to 0.5 mm, and after foaming and forming the foamed layer 18, the thickness is 0.7 to 1.2 mm, preferably 1.15 mm. Have By cutting the base layer 12 of the three-layer laminate sheet 10 from the foam layer 18 in the plane direction, a laminate sheet that can be burned out by a high-frequency welder is obtained. The finished thickness of this laminated sheet is 0.8 to 1.5 mm.

  Next, based on FIGS. 4-6, the manufacturing method of the lamination sheet 10 which concerns on 1st Embodiment of this invention is demonstrated.

  4 is a side view showing a manufacturing process of the foam-containing sheet 16, FIG. 5 is a side view showing a process of pressure bonding the top layer 14, the base layer 12, and the foam-containing sheet 16, and FIG. FIG. 4 is a side view showing a step of foaming a sheet having a three-layer structure of a base layer 12, a foaming agent-containing sheet 16 and a top layer 14.

  (1) First, in order to manufacture the foam-containing sheet 16, a polyvinyl chloride resin, a plasticizer, a stabilizer, etc., and a foaming agent and fine fibers are added and mixed from the upper part of the mixer 23 of the apparatus shown in FIG. Then, the mixture 16 ′ is discharged from the lower part of the mixer 23. A roller 23 around which the base layer 12 is wound is disposed below the mixer 20, and the mixture 16 ′ is carried on the base layer 12 unwound from the roller 25 and is conveyed by the conveyor belt 21. The mixture 16 ′ on the base layer 12 is stretched into a sheet having a uniform thickness by a roller 22 provided along the conveyor belt 21, so that the mixture 16 ′ is bonded to the base layer 12 and integrated with the base layer 12 to the roller 26. It is wound up.

  (2) Next, the top layer 14 is subjected to printing, embossing, a surface treatment agent, and the like to process the surface of the top layer 14.

  (3) Next, as shown in FIG. 5, the top layer 14 wound around the roller 24 is disposed at the upper part, and the base layer 12 and the foamed agent-containing sheet 16 wound around the roller 26 are disposed at the lower part, respectively. The top layer 14 is unwound from the rollers 24 and 26 so that the top layer 14 is placed on the agent-containing sheet 16, and the top layer 14 and the foaming agent-containing sheet 16 are thermocompression bonded by the pressure roller 28.

  (4) Next, as shown in FIG. 6, the laminated sheet 10 to which the base layer 12, the foaming agent-containing sheet 16 and the top layer 14 are pressure bonded is conveyed by a conveyor 31 and passed through a heating oven 30. The laminated sheet 10 is heated at 190 to 240 ° C. while passing through the heating oven 30, and the foamed sheet 16 is foamed to form the foamed layer 18.

  (5) Finally, by cutting the base layer 12 from the foamed layer 18 of the laminated sheet 10 in the surface direction, a laminated sheet that can be burned out with a high frequency welder is formed.

  Since the laminated sheet configured as described above contains fine fibers in the foam layer 18, it can be excellent in strength and durability despite the base layer 12 being cut. Further, since the base layer 12 is cut out, it can be cut out with a high-frequency welder according to the shape of the product, or the laminate can be welded with the high-frequency welder, so that workability is good and manufacturing efficiency is reduced. There is nothing.

Next, a second embodiment of the present invention will be described with reference to the drawings.
2A and 2B are cross-sectional views of the laminated sheet 10 according to the second embodiment of the present invention, in which FIG. 2A shows a state before foaming, FIG. 2B shows a state after foaming, and FIG. ) Shows a state in which the base layer is cut from the foam layer.

  The laminated sheet 10 is formed by heating a base layer 12, a top layer 14, an intermediate layer 20 provided below the top layer 14, and a foam-containing sheet 16 sandwiched between the base layer 12 and the intermediate layer 20. And a foam layer 18. The base layer 12 is made of cloth or non-woven fabric, and has a thickness of 0.1 to 0.3 mm, preferably 0.2 mm. The top layer 14 is made of polyvinyl chloride and has a thickness of 0.1 to 0.3 mm, preferably 0.15 mm. And the intermediate | middle layer 20 consists of a nonwoven fabric which can be burned out with a high frequency welder, and the thickness is 0.1-0.3 mm. The foaming agent-containing sheet 16 is made of a mixture of polyvinyl chloride and a foaming agent, and has a thickness of 0.25 to 0.4 mm. After the foamed sheet 16 is foamed and the foamed layer 18 is formed, it has a thickness of 0.6 to 0.9 mm. By cutting the base layer 12 of the four-layer laminate sheet 10 from the foam layer 18 in the plane direction, a laminate sheet that can be burned out by a high-frequency welder is obtained. The finished thickness of this laminated sheet is 0.8 to 1.5 mm.

Next, the manufacturing method of the lamination sheet 10 which concerns on 2nd Embodiment of this invention is demonstrated.
(1) First, the sheet 16 containing the foaming agent is manufactured, but the description is omitted because it is the same as that of the first embodiment except that the fine fiber is not used as the material of the sheet 16 containing the foaming agent.

  (2) Next, since the surface processing of the top layer 14 is the same as that in the first embodiment, the description thereof is omitted.

  (3) Next, the top layer 14 and the intermediate layer 20 are thermocompression-bonded. This is done by placing the top layer 14 on the intermediate layer 20 using the same apparatus as that shown in FIG. These are thermocompression-bonded by a pressure roller.

  (4) Next, the base layer 12 and the foamed sheet 16 are thermocompression-bonded and the intermediate layer 20 and the top layer 14 are thermocompression-bonded. 5 is placed on a sheet on which the base layer 12 and the foaming agent-containing sheet 16 are thermocompression-bonded using the same apparatus as shown in FIG. These are thermocompression-bonded by a roller.

  (5) Next, the four-layer laminated sheet 10 formed in the step (4) is heat-treated in the same manner as in the first embodiment, whereby the foamed sheet 16 is foamed and the foamed layer 18 is formed. It will be done.

  (6) Finally, by cutting the base layer 12 from the foamed layer 18 of the laminated sheet 10 in the surface direction, a laminated sheet that can be burned out with a high frequency welder is formed.

  In the laminated sheet 10 configured as described above, the intermediate layer 20 is sandwiched between the foam layer 18 and the top layer 14, so that the strength and durability are excellent despite the base layer 12 being cut off. Can be. Moreover, since the nonwoven fabric which can be cut off with a high frequency welder is used as the intermediate layer 20 and the base layer 12 is cut off, the intermediate layer 20 can be cut out with a high frequency welder according to the shape of the product. Therefore, the workability is good and the production efficiency is not lowered.

Next, a third embodiment of the present invention will be described with reference to FIG.
3A and 3B are cross-sectional views of the laminated sheet 10 according to the third embodiment of the present invention, in which FIG. 3A shows a state before foaming, FIG. 3B shows a state after foaming, and FIG. ) Shows a state in which the base layer is cut from the foam layer.

  The laminated sheet 10 of 3rd Embodiment is the point which uses the polyurethane film for the intermediate | middle layer 20 in the laminated sheet 10 of the four-layer structure comprised by the base layer 12, the foam layer 16, the intermediate | middle layer 20, and the top layer 14. Since it is the same as that of the laminated sheet 10 of 2nd Embodiment, description of the structure is abbreviate | omitted. Further, the manufacturing process is the same as that of the second embodiment, and the description thereof is omitted.

  In the laminated sheet 10 of the third embodiment, the intermediate layer 20 is sandwiched between the foam layer 18 and the top layer 14, so that the laminate sheet 10 has excellent strength and durability despite the base layer 12 being cut off. It can be. Further, the intermediate layer 20 is made of a synthetic resin polyurethane film that can be burned out with a high-frequency welder, and the base layer 12 is cut out, so that it can be cut out with a high-frequency welder according to the shape of the product. Since the stacked layers can be welded with a welder, workability is good and manufacturing efficiency is not reduced.

  The intermediate layer 20 is not limited to a polyurethane film as long as it is a synthetic resin that can be burned out by a high-frequency welder.

  In the first to third embodiments, cloth or non-woven fabric is used for the base layer 12, and the base layer 12 is cut away from the foam layer 18 in the plane direction after forming the foam layer 18, but the base layer 12 is made of aluminum or The base layer 12 may be peeled off from the foam layer 18 after the foam layer 18 is formed. The laminated sheet configured as described above also has the same effect as that of the first to third embodiments.

  The above laminated sheets can be used for book bindings, binders, notebooks or diary covers, bags or bags.

(A) is sectional drawing which shows the state before foaming of the lamination sheet which concerns on 1st Embodiment of this invention, (b) is sectional drawing which shows the state after the foaming, (c) cut out the base layer from the foaming layer It is sectional drawing which shows a state. (A) is sectional drawing which shows the state before foaming of the lamination sheet which concerns on 2nd Embodiment of this invention, (b) is sectional drawing which shows the state after the foaming, (c) cut out the base layer from the foaming layer It is sectional drawing which shows a state. (A) is sectional drawing which shows the state before foaming of the lamination sheet which concerns on 3rd Embodiment of this invention, (b) is sectional drawing which shows the state after the foaming, (c) cut out the base layer from the foaming layer It is sectional drawing which shows a state. It is a side view which shows the manufacturing process of a sheet | seat with a foaming agent. It is a side view which shows the process of crimping | bonding a top layer, a base layer, and a foam containing sheet | seat. It is a side view which shows the process of foaming the laminated sheet which comprised the base layer, the sheet | seat containing a foaming agent, and the top layer.

Explanation of symbols

10 Laminated sheet 12 Base layer 14 Top layer 16 Foamed sheet 18 Foamed layer 20 Intermediate layer

Claims (8)

From a base layer that cannot be burned out with a high frequency welder, a top layer that can be burned out with a high frequency welder, and a foamed layer formed by heating a sheet containing a foaming agent sandwiched between the base layer and the top layer In the laminated sheet formed by cutting the base layer from the foamed layer,
The said foaming layer contains the fine fiber of length 0.1-3mm used as the raw material of a nonwoven fabric, The laminated sheet characterized by the above-mentioned. A peelable base layer, a top layer burnable with a high frequency welder, and a foam layer formed by heating a foamed sheet sandwiched between the base layer and the top layer, from the foam layer In the laminated sheet formed by peeling the base layer,
The said foaming layer contains the fine fiber of length 0.1-3mm used as the raw material of a nonwoven fabric, The laminated sheet characterized by the above-mentioned.   The laminated sheet according to claim 1 or 2, wherein the fine fiber is carbon fiber, urethane resin or thermoplastic resin.   A base layer that cannot be burned out by a high frequency welder, an intermediate layer that can be burned out by a high frequency welder, a top layer that is provided on the intermediate layer and can be burned out by a high frequency welder, the base layer, and the intermediate layer A laminated sheet comprising: a foamed layer formed by heating a sheet containing a foaming agent sandwiched between layers, wherein the base layer is cut from the foamed layer.   A peelable base layer, an intermediate layer burnable with a high frequency welder, a top layer provided on the intermediate layer and burnable with a high frequency welder, and a foaming agent sandwiched between the base layer and the intermediate layer A laminated sheet comprising: a foamed layer formed by heating an entering sheet, wherein the base layer is peeled from the foamed layer.   The laminated sheet according to claim 4 or 5, wherein the intermediate layer is a non-woven fabric that can be burned out by a high-frequency welder, or a synthetic resin.   The laminated sheet according to any one of claims 1, 3, 4, and 6, wherein the base layer is a cloth or a nonwoven fabric.   The laminated sheet according to any one of claims 2, 3, 5, and 6, wherein the base layer is a net made of aluminum or Tetoron.

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