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Layered product for soft packaging, soft packaging material, and soft package

A technology of flexible packaging and laminates, which is applied in packaging, wrapping paper, transportation and packaging, etc. It can solve the problems of large gaps, water resistance, poor puncture strength and gas barrier properties, and achieve excellent pinhole resistance.

Pending Publication Date: 2022-02-25
MITSUI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, cellulose-derived paper has many gaps and is inferior in various physical properties, especially water resistance, puncture strength, and gas barrier properties, compared to plastics, which poses a problem.

Method used

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  • Layered product for soft packaging, soft packaging material, and soft package

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7、 comparative example 1～6

[0143] Using an extrusion laminator with a 65mmΦ extruder (L / D=28), under the processing conditions of a die temperature of 300°C, a gap of 110mm, and a processing speed of 80m / min, the paper substrate layer was implemented on-line. After corona treatment, the ionomer (A) of ethylene-unsaturated carboxylic acid copolymer, low-density polyethylene, or ethylene-unsaturated carboxylic acid copolymer is extrusion-coated between the paper substrate layer and the barrier layer , thereby obtaining a laminate in which the paper base layer, the adhesive layer, and the barrier layer are laminated in this order.

[0144]Further, using an extrusion laminator with a 65mmΦ extruder (L / D=28), under the processing conditions that the under-die temperature is 285°C, the gap is 110mm, and the processing speed is 80m / min, in the above-mentioned manner The Al foil of the obtained laminate was extrusion-coated with an ethylene-unsaturated carboxylic acid copolymer or an ionomer of an ethylene-unsa...

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PUM

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Abstract

A layered product for soft packaging comprises at least a paper base layer, an adhesive layer, a barrier layer, and a sealant layer, stacked together in this stated order, wherein the adhesive layer contains an ionomer (A) of an ethylene-unsaturated carboxylic acid copolymer, and the contained amount of metal ions represented by X * Y / 100 is 4.0-20.0, where X [mass%] represents the contained amount of an unsaturated carboxylic acid in the ethylene-unsaturated carboxylic acid copolymer (A1) included in the ionomer (A) of the ethylene-unsaturated carboxylic acid copolymer, and Y [mol%] represents the degree of neutralization of the ionomer (A) of the ethylene-unsaturated carboxylic acid copolymer.

Description

technical field [0001] The present invention relates to a laminate for flexible packaging, a flexible packaging material, and a flexible packaging. Background technique [0002] Conventionally, flexible packaging materials for packaging food, pharmaceuticals, cosmetics, hygiene products, pesticides, seeds, electronic components, electronic equipment, etc. are mostly manufactured by laminating various barrier layers, sealing layers, etc. on a plastic base material. [0003] In recent years, environmental damage caused by plastic waste has become a worldwide problem, and packaging materials that reduce environmental load in line with the rising opportunities for environmental friendliness and resource conservation have attracted attention. Among them, it is considered that in the field of flexible packaging, the reduction of the amount of plastic used can also be achieved by changing the plastic base material to a configuration using "paper" which is one of biomass materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B29/00B32B27/32B32B15/12B32B15/085B65D65/40
CPCB32B7/12B32B29/00B32B27/32B32B15/12B32B15/085B65D65/40B32B27/10B32B7/02B32B7/027B32B15/08B32B15/20B32B15/082B32B27/08B32B27/16B32B27/308B32B27/306B32B27/34B32B27/36B32B29/002B32B29/06B32B2250/04B32B2250/05B32B2255/12B32B2270/00B32B2307/31B32B2307/718B32B2307/7242B32B2307/7244B32B2307/7246B32B2307/7248B32B2307/7265B32B2307/7376B32B2439/70B32B2439/80B32B2439/46B32B2439/40B32B2250/03B32B2307/732B32B2553/00
Inventor 桥本秀则
Owner MITSUI LTD
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