Easy-to-unseal packaging bag

a packaging bag and easy-to-unseal technology, which is applied in the directions of flexible container closure, semiconductor/solid-state device details, containers, etc., can solve the problems of reducing the strength of the portion to which the scar is provided, content is broken or deformed upon opening the bag, and the strength of the sealed portion is reduced. , to achieve the effect of opening simpl

Inactive Publication Date: 2005-04-14
ASAHI KASEI PAX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] The present invention is concerned with a packaging bag formed by adhering two sheets of front and rear side films mutually at peripheral parts to seal an inside thereof, wherein the front side film has, in one direction, linearly cuttable property that is larger than linearly cuttable property in any direction of the rear side film, and a processed portion capable of starting cutting of the front side film along the one direction is provided at a part of the adhered peripheral parts that intersects with the one direction. According to this configuration, a packaging bag that can eliminate such a fear that the sealed portion is peeled off during a distribution stage and can be opened simply can be obtained.

Problems solved by technology

However, there has been such a problem that, when the contents are easy-deformable goods such as a Japanese-style confection, a cookie or the like, or flat goods, the contents are broken or deformed upon tearing open the bag.
In the case where the easy peel-off property is provided to the overall sealed portion, there is a fear that such sealed portion may be broken in a distribution stage.
Therefore, this technique involves the problems that an additional step of providing the fine scar to the film becomes necessary and that the strength of the portion to which the scar is provided becomes lowered.
That is, although there is the difference in the separating method between them, i.e., according to the film peeling-off by forming the weakly adhesive and easy peel-off sealing or the film cutting by providing the easy tear-off property to the film, in either case the foregoing problems have arisen because of the necessity for film separation.
Therefore, upon unzipping the zipper after the packaging bag is opened or closed again to take out the contents, no finger hold used to separate the front and rear films at the torn portion of the bag is not provided.
As a result, there has been a problem of being poor in easy-open property to separate the front and rear films right and left.

Method used

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  • Easy-to-unseal packaging bag
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  • Easy-to-unseal packaging bag

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0057] The front-side laminated film was formed by extruding a low-density polyethylene, which has a density of 0.920 g / cm3 and a thickness of 15 μm, from a T die to laminate together with EMBLET PC, which is a vertically linearly-cuttable polyethylene terephthalate film of 12 μm thickness manufactured by Unitika Ltd. and an aluminum foil of 7 μm thickness via an anchor coating agent by means of sand lamination method, and then extruding the above low-density polyethylene of 300 μm thickness from the T die to laminate on the aluminum foil side. The rear-side laminated film was formed in the same way as above, except that a general polyethylene terephthalate film of 12 μm thickness and without the linearly cuttable property was used in place of the linearly-cuttable polyethylene terephthalate film.

[0058] With a bag forming machine, films serving as the front and rear surfaces of the bag were fed continuously from the biaxial feeder to oppose the low-density polyethylene films to eac...

example 2

[0060] As the front-side laminated film, UNIASLON TB1000 which is a vertically linearly-cuttable polyamide film of 15 μm thickness manufactured by Idemitsu UniTech Co. Ltd. and a linear low-density polyethylene film of 50 μm thickness were laminated by the dry lamination method using a two-liquid polyurethan adhesive. As the rear-side laminated film, a laminated film was formed in the same way as in Example 1, except that a general nylon 6 film of 15 μm thickness and without the linearly cuttable property was used in place of the linearly-cuttable polyamide film. Then, a bag with a zipper was obtained by forming these laminated films into the bag in the same way as in Example 1. In this case, regarding the processed portion, a width of the sealed portion was widened locally to 15 mm by protruding the sealed end portion into the inner side of the packaging bag by 5 mm as indicated by 13-1 in FIG. 3, and the same incision as in Example 1 was provided to the position that is on the inn...

example 3

[0062] As the front-side laminated film, the nylon 6 film of 15 μm thickness and without the linearly cuttable property used in the rear-side laminated film in Example 2, a laterally monoaxially stretched polypropylene film YT22 of 25 μm thickness manufactured by Toray Industries, Inc., and a linear low-density polyethylene film of 30 μm thickness were laminated in this order by using a two-liquid polyurethane adhesive. Also, the same rear-side film as in Example 2 was used as the rear-side laminated film.

[0063] Then, a bag whose one side in the flow direction of the bag forming machine was opened and remaining three sides were sealed and in which a longitudinal length was 150 mm, and a lateral length was 100 mm, and a seal width was 10 mm was obtained by forming the laminated films serving as the front and rear surfaces of the bag into a bag by means of the bag forming machine having the biaxial feeder. At this time, a zipper as provided in Examples 1, 2 was not provided.

[0064] A...

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Abstract

An object of the present invention is to provide a packaging bag capable of being realized only by a rather simple processing and opened easily by hand without deteriorating the sealing strength of the packaging bag and the strength of the packaging bag itself and without suffering from the possibility of peeling-off of the sealed portion during a distribution stage. The present invention relates to a packaging bag formed by adhering two sheets of front and rear side films mutually at peripheral parts to seal an inside thereof, wherein the front side film has, in one direction, linearly cuttable property that is larger than linearly cuttable property in any direction of the rear side film, and a processed portion capable of starting cutting of the front side film along the one direction is provided at a part of the peripheral parts that intersects with the one direction.

Description

TECHNICAL FIELD [0001] The present invention relates to an easy open packaging bag capable of being easily opened by hand by tearing off one side of the bag linearly in predetermined width. [0002] The present invention relates to a packaging bag used in a wide variety of packaging fields such as foods, articles of clothing, medical supplies, groceries, and so forth. More particularly, the invention relates an easy open packaging bag with a zipper capable of maintaining its sealed state in a distribution stage and also reproducing the sealed state as occasion demands after such bag is opened by the consumer, or the like. BACKGROUND ART [0003] Sealing bags using various synthetic resins are utilized in many packaging fields such as foods, articles of clothing, medical supplies, groceries, and others. When the contents are used, the bag must be torn open by any method to take out the contents. [0004] Conventionally, flat type sealing bags are constructed to take out the packed contents...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D33/25B65D75/58H01L23/31H01L25/065H01L29/06
CPCB65D33/2533B65D75/5805H01L23/3128H01L25/0657H01L29/0657H01L2225/0651H01L2924/0002H01L2225/06555H01L2225/06575H01L2924/00
Inventor ABE, KENJIROMATSUSHITA, TETSUO
Owner ASAHI KASEI PAX CORP
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