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Chuck and chuck-equipped bag

A buckle and concave technology, applied in the directions of bags, fasteners, sacks, etc., can solve the problems of airtightness, damage to airtightness, and inability to obtain airtightness by the buckle, so as to ensure airtightness and improve convenience. sexual effect

Inactive Publication Date: 2009-12-02
IDEMITSU UNITECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] There is a problem in the bag with the buckle made in this way, that is, the fitting shape of the convex protrusion and the concave protrusion at the flattened part of the buckle is deformed, and a leakage path of air is generated here, even if the buckle itself has an air tightness, and good airtightness cannot be obtained
[0013] Like this, in this bag with buckle, there is not only the problem that it is difficult to impart airtightness to the buckle itself, but also the problem of impairing airtightness when making the bag, resulting in unsuitable applications for storing liquids, Applications that require gas barrier properties, such as applications that require airtightness

Method used

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  • Chuck and chuck-equipped bag
  • Chuck and chuck-equipped bag
  • Chuck and chuck-equipped bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] While melt-extruding low-density polyethylene to form the concave part, an elastic adhesive material mainly composed of SIS-based synthetic rubber is extruded onto the inner bottom of the concave part (morescomelt LT-170: Matsumura Oil Research Institute Co., Ltd. manufacturing), such as image 3 As shown, it is integrally formed on the inner bottom of the concave part. Furthermore, the male part is extruded with the same material as used in the female part.

[0097] The shape of the male part and the female part is set to be substantially the same shape as that shown in the case of the male part 2, and the proportion of the elastic adhesive material in the space formed between the convex protrusion and the concave protrusion is determined according to the longitudinal direction of the buckle. The cross-sectional area ratio of the surfaces intersecting in the longitudinal direction is 60%.

Embodiment 2

[0099] set to Figure 5 The shown case has substantially the same shape, except that the male part and the female part are produced in the same manner as in Example 1. The proportion of the elastic adhesive material in the space formed between the convex protrusion and the concave protrusion is 20% in terms of the cross-sectional area ratio of the surface intersecting the longitudinal direction of the buckle.

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PUM

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Abstract

On the inner bottom (222b) of the concave protrusion (22b), along the longitudinal direction, there are elastic adhesive joints continuously arranged in the manner of bulging to the space formed between the hooks (221b, 221b) of the concave protrusion (22b). material (4), when the convex protrusion (21a) and the concave protrusion (21b) are fitted, the elastic adhesive material (4) is pressed onto the head (221a) of the convex protrusion (22a), and elastically deforms while It abuts against the head (221a) of the convex protrusion (22a), and under the action of its adhesive force and elastic force, it is in close contact with the surface of the front end side of the head (221a), thereby ensuring that there is a buckle The airtightness of the bag.

Description

technical field [0001] The present invention relates to a reclosable and re-openable fitting-type clasp having improved airtightness, and a clasp-equipped bag having such a clasp. Background technique [0002] In the past, in many fields such as bedding, clothing, food, medicine, miscellaneous goods, etc., the following buckle-equipped bags have been used. And be set to open and close freely (for example patent document 1, patent document 2 etc.). [0003] Generally, such a bag with a buckle is manufactured by preparing a tapered buckle in advance, sealing the buckle with a base film as a material of the bag, and forming a bag. [0004] Patent Document 1: JP-A-6-239356 [0005] Patent Document 2: Japanese Patent Publication No. 4-22789 [0006] Such a bag with a buckle can be reclosed and re-opened by fitting and disengaging due to the elastic deformation of the convex and concave protrusions formed on the buckle, or it must be manufactured to ensure manufacturing toleran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A44B19/16B65D33/25
CPCY10T24/2532B65D33/2533A44B19/16Y10T24/15Y10T24/45168Y10T24/2514B65D33/2541Y10S24/50B65D33/25
Inventor 片田亮田中研一岩本壮弘
Owner IDEMITSU UNITECH CO LTD