Vacuum fresh-maintaining plastic bag

a plastic bag and vacuum technology, applied in the field of vacuum fresh-maintaining plastic bags, can solve the problem of not being able to put the whole plastic bag into the vacuum chamber for vacuum-pumping

Inactive Publication Date: 2003-06-05
WANG DONGLEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vacuum bag sealer used in the family is in small volume and low power, therefore it

Method used

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  • Vacuum fresh-maintaining plastic bag
  • Vacuum fresh-maintaining plastic bag
  • Vacuum fresh-maintaining plastic bag

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

The First Embodiment

[0017] As shown in the FIG. 1 and FIG. 2, the vacuum fresh-maintaining plastic bag includes two layer thin film, and the opposite inner surface of each of the thin film is in the shape of the parallel concave-convex channel, and the channels of the two opposite inner surfaces are intersected with each other by the angle of 0.degree.<.alpha..ltoreq.9-0.degree. therebetween.

[0018] The film (1, 2) includes two layers (5, 6), the inner layer 5 is made of the PE plastic material, while the outer layer 6 is made of the PA plastic material, the inner layer 5 and the outer layer 6 are recombined into the concave-convex channel shape, the channels 3 are arranged in line, and the films (5, 6) are in a wavy shape, the channels 3 of the film 5 and film 6 are intersected to each other by the angle of 0.degree.<.alpha..ltoreq.90.degree. therebetween after the films (5, 6) being packaged into the bag. The section of the above channels is in the triangle shape, and the distance ...

second embodiment

The Second Embodiment

[0019] As shown in the FIGS. (3), (4), and (5), the vacuum fresh-maintaining plastic bag includes a two layer thin film, and the two opposite inner surfaces both have the concave pits. The recess direction of the said concave pits along the opposite inner surface is directed to the outside, and the pits of the two opposite inner surfaces are intersected or being faced each other. The said films (1, 2) are in two layers (5, 6), the inner layer 5 thereof is made of the PE plastic while the outer layer 6 is made of the PA plastic. The inner layer 5 and the outer layer 6 are pressed into the regularly arranged pits after they are recombined together. The pits on each of the two opposite surfaces are regularly arranged without communication to each other, the width of the pits are disposed in proportion with the distance between the pits in order to keep better air flowing, the route of the air flowing is shown in the FIG. (6).

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Abstract

The vacuum fresh-maintaining plastic bag, wherein it includes two layer thin film, and the two opposite inner surface of each of the thin film is non planar surface. In the present utility model, while the vacuum fresh-maintaining plastic bag is being vacuum pumped, since the channels and the pits of the two opposite inner surfaces are intersected to each other, the air is discharged to the outside of the bag along the channels as a result of not forming the suction region near the suction nozzle and greatly improving the vacuum degree of the packaging bag.

Description

THE TECHNICAL FIELD[0001] The present utility model relates to a vacuum fresh-maintaining plastic bag, and particularly relates to a vacuum fresh-maintaining plastic bag with the two-layer composite structure.THE BACKGROUND ART[0002] The traditional vacuum plastic bag being used now is usually made of the PE material with the strong air permeability, which leads to the entry of air into it even after the vacuum plastic bag being packaged for sometime and loosing the fresh-maintaining function. And then it is suggested that the material of the plastic bag should be the composite material, the inner layer of that is the non-poisonous PE (polyethylene) or PP (polypropylene), while the outer layer of that is made of the PA (polyamide) material without the air permeability. The vacuum bag sealer used in the family is in small volume and low power, therefore it is not possible to put the whole plastic bag into the vacuum chamber for vacuum-pumping. In this case, it is suggested to put the...

Claims

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Application Information

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IPC IPC(8): B65D81/20
CPCB65D81/2023
Inventor WANG, DONGLEI
Owner WANG DONGLEI
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