Easy-to-unseal packaging bag

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...

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.

[0013] Also, the present invention is concerned with a packaging bag with a zipper having: a bag main body formed by adhering two sheets of front and rear side films mutually at peripheral parts to seal an inside thereof; and a zipper portion re-sealably provided at an inner side position than the adhered peripheral part of an open edge side of the bag main body, 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, wherein the zipper portion is provided along the one direction, and wherein a processed portion capable of starting cutting of the front side film along the one direction is provided between the adhered peripheral part of an open edge side of the bag main body and the zipper portion, and at a part of the adhered peripheral parts that intersects with the one direction. According to this configuration, a packaging bag with a zipper that can eliminate such a fear that the sealed portion is peeled off during a distribution stage, can be opened simply, and can attain the easy-open property of the zipper upon sealing the bag again can be obtained.

[0017] Also, it is preferred that the processed portion comprises at least two adjacent notches that are provided at an outer edge portion of the adhered peripheral portions of the packaging bag. According to this configuration, the opening can be started by the simple processing to provide the notches.

[0018] Also, it is preferred that the processed portion is formed as a tab-shaped incision provided in the adhered peripheral portions areas of the packaging bag. According to this configuration, a fear of the trouble that the bag is opened in error during a distribution stage can be reduced.

[0019] Also, it is preferred that the adhered peripheral portion that is located near the processed portion is to have a wider width than those of the other adhered peripheral portions. According to this configuration, a fear to cause the bag open trouble during a distribution stage can be reduced much more.

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.

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