Porous film for bag-constituting member and bag-constituting member for disposable body warmer

A technology of porous film and bag body, which is applied in the field of bag body components for kairo, can solve the problems of broken bags, heat sealing strength (reduced sealing strength, difficult to achieve high-speed production, etc., and achieves improved heat resistance, Excellent low-temperature heat-sealability and improved productivity

Inactive Publication Date: 2012-12-19
日东来福泰株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The porous film of the above-mentioned Patent Document 3, when the heat-sealing processing conditions are weak, the heat-sealing strength (sealing strength) may be lowered and the bag may be broken, which makes it difficult to realize high-speed production
That is, the porous film of Patent Document 3 is not yet sufficient in terms of heat-sealing strength during low-temperature heat-sealing.

Method used

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  • Porous film for bag-constituting member and bag-constituting member for disposable body warmer
  • Porous film for bag-constituting member and bag-constituting member for disposable body warmer
  • Porous film for bag-constituting member and bag-constituting member for disposable body warmer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] As a polymer component, 100 parts by weight of linear low-density polyethylene (metallocene LLDPE-(a)) (MFR (190°C): 3.8 (g / 10min), density: 0.918 g / cm 3 , Vicat softening point: 101°C), 30 parts by weight of ethylene-α-olefin copolymer (ethylene-α-olefin copolymer-(d)) (MFR (190°C): 3.6 (g / 10min), density: 0.870g / cm 3 , Vicat softening point: 40°C), 10 parts by weight of high molecular weight ethylene polymer (high molecular weight ethylene homopolymer) with a weight average molecular weight of 320,000 (MFR (190°C): 0.08 (g / 10min), density: 0.958 g / cm 3 ), and 130 parts by weight of calcium carbonate (inorganic particles) with an average particle size of 1.1 μm, 0.5 parts by weight of calcium stearate and 0.8 parts by weight of antioxidant were melted and kneaded at 200 ° C to obtain a mixed raw material.

[0128] The mixed raw materials were melt-extruded at 210° C. with a single-screw extruder to produce an unstretched film. Then, the unstretched film was stretche...

Embodiment 2

[0131] As shown in Table 2, change metallocene LLDPE-(a) to metallocene LLDPE-(b) (MFR (190°C): 3.8 (g / 10min), density: 0.924g / cm 3 , Vicat softening point: 106°C), except that the calcium stearate was changed to 1.5 parts by weight, and the antioxidant was changed to 1 part by weight, except that, the same operation as in Example 1 was performed to produce a porous film and a bag constituting member.

Embodiment 3

[0133] As shown in Table 2, change the high molecular weight ethylene copolymer into a high molecular weight ethylene-propylene copolymer with a weight average molecular weight of 790,000 (MFR (190°C): 43 (g / 10 minutes), density: 0.930 g / cm 3 ), except that the calcium stearate was changed to 1.5 parts by weight, and the antioxidant was changed to 1 part by weight. In the same manner as in Example 1, a porous film and a bag constituting member were produced.

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Abstract

The invention relates to a porous film for a bag-constituting member and a bag-constituting member for a disposable body warmer. The invention aims at providing a porous film for a bag-constituting member which has good low-temperature heat sealability. In addition, the invention aims ar providing a bag-constituting member for a disposable body warmer which uses the porous film for a bag-constituting member. The porous film for a bag-constituting member is characterized in that the porous film is prepared by a linear low-density polyethylene, an olefinic copolymer having a Vicat softening point of from 20 DEG C to 50 DEG C and a density of less than 0.900 g / cm3 and an inorganic filler, and is formed by stretching an unstretched film to be porous.

Description

technical field [0001] The present invention relates to a porous film for a bag constituting member and a bag constituting member for a kairo including the porous film for a bag constituting member. Background technique [0002] Currently, porous films are widely used as bag constituents enclosing a heating element of a disposable body warmer, or bag constituents enclosing a dehumidifier or deodorant (for example, refer to Patent Documents 1 and 2). [0003] As the disposable body warmer, for example, Figure 4 A disposable body warmer of the composition shown. Specifically, two bag constituent members (top material 6 and back material 7 ) are made into a bag by means of heat sealing, and a heating element 3 mainly composed of iron powder and the like is sealed inside the bag. . From the viewpoint of oxygen supply to the heating element, at least one of the bag constituting members (generally, the surface material 6) is, for example, an air-permeable member composed of a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L23/16C08K3/26B32B27/02B32B27/08B32B27/32B32B7/12B29C55/02B65D65/40A61F7/08
CPCB32B2307/706B32B5/022B32B2307/516B29C55/06B32B27/205B29C55/005B29K2023/0625B32B2307/72B32B2439/06B32B2250/02B32B2307/31B32B27/12B32B2264/104B32B2307/5825B32B2270/00B32B7/14B32B2262/0261C08L23/06C08L23/0815B29K2105/04B32B27/32B29K2105/16C08L2205/02
Inventor 永海洋武田安洋
Owner 日东来福泰株式会社
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