Plastic pouch and method of producing the same

A manufacturing method and technology of plastic bags, applied in bags, sacks, packaged food, etc., can solve the problems of content ejection, complicated cost, increase, etc., and achieve the effect of preventing ejection or leakage

Active Publication Date: 2007-10-10
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among these bags, the flat-laying bag is the most excellent in terms of productivity and cost, but this type of bag cannot be used when cooking in a microwave oven or after the bag is automatically opened due to an increase in internal pressure. The opening is kept at a high position stably, so there is a disadvantage that the contents of the bag are ejected and leaked from the automatic opening
[0008] For this reason, in order to keep the opening of the flat-laying microwave heating and cooking bag at a high position, someone has proposed a plan to use auxiliary tools such as a single packing box (with reference to Japanese Patent Laid-Open No. Auxiliary tools are complex and costly

Method used

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  • Plastic pouch and method of producing the same
  • Plastic pouch and method of producing the same
  • Plastic pouch and method of producing the same

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Embodiment Construction

[0091] Embodiments of the present invention will be described in detail below.

[0092] As the plastic film constituting the plastic bag of the present invention, heat-sealable plastic materials generally used in the manufacture of packaging bags can be used. The plastic material includes, for example, a single-layer film or sheet containing a heat-sealable thermoplastic resin, or a multilayer film formed by laminating a heat-sealable thermoplastic resin and another thermoplastic resin.

[0093] The above-mentioned heat-sealable plastic materials include, for example, known low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, etc. olefin resins such as olefin resins grafted and modified by ethylenically unsaturated carboxylic acids and their anhydrides, polyamides and copolyamide resins with low melting point or even low softening point, ...

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PUM

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Abstract

At least either of a front side film and a back side film that construct a plastic pouch is folded back along the entire length in the width direction of the pouch, and a peripheral section is heat sealed. By this, at least one folded back section that communicates with a pouch body is formed.

Description

technical field [0001] The present invention relates to a lay-flat plastic bag obtained by heat-sealing the peripheral parts of plastic films constituting the front and back sides of the bag and its manufacturing method. The plastic bag of the present invention is filled with content such as retort bagged food containing liquid matter, solid matter or their mixture, and is suitable for use as a bag for heating and cooking in a microwave oven. Background technique [0002] When a sealed packaging bag filled with retort food, frozen food, etc. is heated in a microwave oven, the water vapor generated from the contents will increase the pressure inside the bag along with the heating, the packaging bag will rupture, and the contents will scatter. At the same time, it will pollute the microwave oven, which may cause burns and other hazards to the human body. [0003] For this reason, before the above-mentioned packaging bag is heated and cooked with a microwave oven, the method o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D81/34B65D33/01
Inventor 黑泽和之神崎敬三西本史绘樱井毅人
Owner TOYO SEIKAN KAISHA LTD
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