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Layered product

A technology for laminates and heating elements, applied in the direction of layered products, synthetic resin layered products, flexible coverings, etc., which can solve problems such as discomfort, broken bags, damage to the softness and texture of laminates, etc.

Inactive Publication Date: 2008-04-09
IDEMITSU UNITECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the storage object of disposable thermal stickers and the like is a heating element composition, so if the film is made of a material with a low melting point, when the heating element composition generates heat, the film will soften and deform, and even the bag will be broken.
[0009] In addition, regarding the occurrence of wrinkles in the aforementioned heat-sealed portion, although it has been proposed to increase the thickness of the film layer constituting the laminated body, or to use a film of a material with excellent strength in the film layer, the strength of the laminated body should be made more than a certain level. However, the use of such a film may impair the softness and texture of the laminate, and it is not suitable for use as a constituent material of a disposable thermal paste, etc., which contact human skin.
Moreover, a means of softening only the sealed part of the laminate has been proposed, but the softness and texture of the disposable thermal sticker are required not only at the peripheral part (sealed part) but also at the central part of the thermal sticker. non-preferred
[0010] As mentioned above, the current situation is: as the constituent material of the packaging material for the heat generating composition such as accommodating disposable thermal stickers, it may not be possible to provide satisfactory non-woven fabrics made of polypropylene, and general-purpose polypropylene resin or Polyethylene-based resin is a laminated body composed of a sealing layer film composed of a thermoplastic resin

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach

[0061] As shown in FIGS. 1 and 2 , the laminated body 1 of this embodiment adopts a structure in which a polypropylene nonwoven fabric 2 and a thermoplastic resin layer 3 are laminated, and the polypropylene nonwoven fabric 2 and the thermoplastic resin layer 3 are laminated. Interlayer resin 4 is provided therebetween.

[0062] As the polypropylene-based nonwoven fabric 2 constituting the laminate 1 of the present embodiment, a 10% modulus in the MD direction at an ambient temperature of 100° C. measured by a method based on JIS L1096 is 15 N / 50 mm or more.

[0063] Furthermore, as the polypropylene-based resin constituting the polypropylene-based nonwoven fabric 2 in the present embodiment, a polypropylene-based resin having a stereoregular NMR value (mmmm ratio) of 95% or more and an isotactic pentad ratio of 98% or more is used. Homopolypropylene with high stereoregularity, the material has a melting point of about 164°C. Furthermore, as the type of nonwoven fabric, a spu...

no. 2 Embodiment approach

[0092] This embodiment is basically the same as the above-mentioned first embodiment, and redundant description of the same configuration will be omitted. Next, differences from the aforementioned first embodiment will be described.

[0093] In the aforementioned first embodiment, the 10% modulus in the MD direction at 100° C. of the polypropylene-based nonwoven fabric 2 is 15 N / 50 mm or more. On the other hand, in the present embodiment, the 10% modulus in the MD direction as the entire nonwoven fabric laminate 1 is 65 N / 50 mm or more at normal room temperature.

[0094] In the aforementioned first embodiment, the thermoplastic resin layer 3 has a single-layer structure composed of a polypropylene-based resin composition. On the other hand, in this embodiment, the thermoplastic resin layer 3 is a multilayered film composed of a polypropylene resin composition.

[0095] In the aforementioned first embodiment, the interlayer resin 4 is a polyethylene-based resin. On the othe...

Embodiment 1

[0117] (Process A) Manufacture of polypropylene spunbonded nonwoven fabric:

[0118] As the polypropylene-based resin, polypropylene resin (Y-2000GV: manufactured by Idemitsu Petrochemical Co., Ltd., NMR value (mmmm ratio) of 97%, isotactic pentad ratio of 99%) was used. method, manufactured a unit area weight of 40g / m 2 Polypropylene spunbonded nonwoven fabric. The polypropylene spun-bonded nonwoven fabric has a 10% modulus in the MD direction of 23N / 50mm at an ambient temperature of 100°C.

[0119] (Process B) Manufacture of laminated body:

[0120] For the polypropylene spun-bonded nonwoven fabric obtained in the aforementioned (step A), a polyethylene-vinyl acetate copolymer resin (Ultrasen 526: manufactured by Toray Co., Ltd., with a melting point of 97° C. and a vinyl acetate (VA) content of 7 %) is a thermoplastic resin layer, using the manufacturing device shown in Figure 4, extrusion lamination of polyethylene-vinyl acetate copolymer so that the thickness of the th...

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Abstract

The present invention provides a layered product (1) comprising a nonwoven polypropylene fabric (2) and a thermoplastic resin layer (3), wherein the nonwoven polypropylene fabric (2) has a machine-direction 10% modulus of 15 N / 50 mm or higher as measured at an ambient temperature of 100 DEG C. Alternatively, the layered product (1) has a machine-direction 10% modulus of 65 N / 50 mm or higher.

Description

technical field [0001] The present invention relates to laminates. Specifically, it relates to a non-woven fabric laminate for storing a heating element that generates heat in the presence of air, and more specifically, it relates to a heating element composition storage bag that is preferably used as a disposable thermal sticker or the like. of the constituent materials. Background technique [0002] Conventionally, a laminated body bonded with a nonwoven fabric and a thermoplastic resin film, etc. has been proposed. For example, the laminated body is formed into a bag, and iron powder, water, wood powder, activated carbon, inorganic salt, etc. are stored therein. And other heating element composition, that is, used as a packaging material for disposable thermal stickers. The disposable thermal patch takes in air (oxygen) into the interior due to the air permeability of the above-mentioned laminate, and the exothermic composition present inside contacts with oxygen to gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B5/02A61F7/08B65D65/40B32B27/12B32B27/32
Inventor 仓桥明彦中上博行
Owner IDEMITSU UNITECH CO LTD
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