JP3004229U - Easy-open packaging bag and easy-open packaging - Google Patents

Abstract

(57) [Summary] [Structure] A plastic bag made of a thermoplastic resin film is characterized in that the opening has a cut notch reaching the inside of the bag, and the edge of the cut notch is welded. Easy to open packaging bag with. [Effect] According to the present invention, since the edge and the tip of the cut notch are welded, the sealing property of the package can be maintained, and the tip of the cut notch is also welded, so that it is better than the tip of the notch by a mere blade. Since the resistance to tearing force is also large, there is no risk of tearing from the notch during handling, and even if the bag is a bag without a welding edge, it can be applied to any type of bag or package. There is also an advantage that can be applied.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an easily openable packaging bag and an easily openable package made of a thermoplastic resin film.

[0002]

[Prior art]

 Conventionally, a wide variety of products have been packaged in thermoplastic resin film bags. Despite being a thin and light film, the resin film packaging has the advantage that the film is strong and has excellent sealing performance. However, it has a drawback that the bag is difficult to break when the contents are taken out from the package. In order to eliminate this drawback, it is the current practice to add a notch to the glue margin of the bag at the opening point as shown in Fig. 1 and tear the bag by tearing the end of this notch with your finger. It is being appreciated. However, in order to make such a notch, it is necessary for the bag to have a welding edge M having a certain width, for example, a welding edge M having a width of about 5 mm, at the end of the packaging bag. As shown in FIG. 2, when a cut notch as shown in FIG. 1 is applied to a bag formed by a welding edge N having a narrow width of 1 mm or less at the end of the bag, air enters from the cut notch portion and the sealing performance is lost. Further, even if the width of the welding edge is constant as shown in FIG. 1, the length of the notch is limited by the width of the welding edge M, and if the position of the cutting operation is incorrect, the tip of the notch reaches the inside of the bag body. Since the sealing property is lost, it is necessary to perform the notching operation at the correct position. Moreover, since the tip is cut with a sharp edge, the tip may tear with a very weak force, and careful handling of the package is required.

[0003]

[Problems to be Solved by the Invention] The present invention has a drawback that the notching operation of the package is easy and it can be applied to a packaging bag having a narrow welding edge, and the tip of the notch tears with a very weak force. The object is to provide an improved package and packaging bag.

[0004]

[Means for Solving the Problems]

 The present inventors achieved the object of the present proposal by cutting the edge of the bag body with a hot blade heated to a temperature higher than the melting point of the resin film of the bag body, making a notch in the cut, and welding the edge of the cut portion. We have found what we can do, and have completed the present invention based on this finding. That is, the present invention is characterized in that, in a plastic bag made of a thermoplastic resin film, the opening has a cut notch whose tip reaches the inside of the bag body, and the edge of the cut notch is welded. In a package in which products are packaged in an easy-open packaging bag and a plastic bag made of a thermoplastic resin film, the opening has a cut notch whose leading end reaches the inside of the bag, and the edge of the cut notch is welded. The present invention provides an easily-openable resin film package which is characterized in that The thermoplastic resin film used in the present invention can be used without particular limitation as long as it is a thermoplastic resin film. For example, a resin film such as polyethylene, polypropylene, polyester, nylon, or a laminated film thereof can be used. You can

There is no particular limitation on the shape and size of the bag applicable to the present invention and the product to be stored. Any bag can be used as long as it can be opened by tearing a part of the bag. can do. For example, instant dry noodle packaging bags, raw noodle packaging bags, sachets of liquid solid seasoning such as sugar, sauce, soy sauce, stationery packaging bags such as writing instruments, everyday miscellaneous goods packaging thermoplasticity of all kinds of products. It can be applied to a resin film packaging bag. As a form of the packaging bag, it is convenient to apply the folded shape formed by polymerizing two resin films and fusing the side edges thereof to form a substantially rectangular shape. The cut notch at the end of the packaging bag of the present invention is a hot blade heated to a temperature higher than the melting point of the resin film of the bag body in a state where the end of the bag is folded, and the upper and lower two polymer films are simultaneously melt-cut. It can be provided by notching by fusing to a depth of about 3 to 20 mm, preferably about 5 to 10 mm from the edge. The notch provided in the present invention can also be formed by punching the edge of the bag in a V shape with a wedge-shaped hot blade, in addition to the above-mentioned cutting with the hot blade. In this case, by appropriately selecting the shape of the tip of the V-shaped hot blade, the resistance against the tearing force of the notch can be adjusted to a size with a good balance between easy opening and breakage. Since the cut notch of the present invention cuts the edge of the bag body with the hot blade, the upper and lower films overlapping at the edge are welded at the edge of the cut notch at the same time when the edge of the bag body is cut. ing. Therefore, the sealing property between the inside and the outside of the bag can be maintained. The cut notch of the present invention is preferably provided in the packaging bag manufacturing process, but the cut notch can be constructed after inserting the product into the packaging bag.

[0006]

【Example】

 The present invention will be described in more detail with reference to the drawings of the embodiments. 3 and 4 of the embodiment of the present invention, one thin film 1 made of polyethylene is bent at the bottom edge 4 and the lower surface film 2 and the upper surface film 3 are polymerized into a square shape to form a side edge fusion portion 9 A rectangular bag for noodles formed by fusing the side edge fusion-bonding part 10, which has an opening 5 at the upper part, and after inserting a product from this, fusing below the opening 5 to form a package. Can be hermetically sealed. The side edge fusion portion 9 and the side edge fusion portion 10 are simply formed by a normal fusing process, and the side edges of the bag are formed with a narrow welding width of 0.3 mm or less. This bag is provided with a fusing cut notch 6 on one of the lower parts of the bag body by fusing with a hot blade before inserting a product. As shown in FIG. 7, since the lower surface film 2 and the upper surface film 3 are welded to each other at the edges 7 and 7'of the cut notch 6, the sealing property inside the bag is reliably maintained. Further, since the resin is melted and welded at the tip 8 of the cut notch where the edges 7 and 7'of the cut notch 6 intersect, the resistance against the tearing force is lower than that of the tip of the conventional notch cut with a sharp blade. It's getting bigger. In the present embodiment, the fusing cut notch 6 is provided on the lower side edge of the bag body, but the position of the notch of the present invention is not particularly limited, and the bottom portion, the upper side edge, or the edge after sealing of the opening is a bag. It can be appropriately provided at a position suitable for breaking. In principle, one piece is sufficient, but two or more pieces can be provided if desired. FIG. 5 is a perspective view of a small package in which soy sauce is stored in the packaging bag of the present invention. The conventional cut notch could not be applied to small resin film bags with no weld width on the side edges. The contents of this package can be easily taken out by tearing the cut notch 6 with a finger, and the cut notch is not broken, so that it can be safely stored.

[0007]

[Effect of device]

 According to the present invention, since the edge and the tip of the notch are welded, the tightness of the package can be maintained, and the tip of the notch is also welded. Since it has a large resistance to tearing force, there is no risk of tearing from the notch during handling.Also, even if the bag is a bag with no welding edges, it can be applied to any type of bag or package. There is also an advantage that can be applied.

[Brief description of drawings]

FIG. 1 is a front view of a prior art packaging bag.

FIG. 2 is a front view of a conventional packaging bag that cannot be notched.

FIG. 3 is a sectional view of a packaging bag according to an embodiment of the present invention.

FIG. 4 is a front view of a packaging bag according to an embodiment of the present invention.

FIG. 5 is a perspective view of soy sauce stored in a packaging bag according to an embodiment of the present invention.

FIG. 6 is an enlarged plan view of a cut notch portion according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of the cut notch of FIG. 6 cut perpendicularly to the notch direction.

[Explanation of symbols]

 1 Thin Film 2 Lower Film 3 Upper Film 4 Bottom Edge 5 Opening 6 Cut Notch 7, 7'Cut Notch Edge 8 Cut Notch Tip 9, 10 Side Edge Fusion Part M, N Weld Edge

Claims (2)

[Scope of utility model registration request] 1. A plastic bag made of a thermoplastic resin film, characterized in that the opening has a cut notch whose tip reaches the inside of the bag, and the edge of the cut notch is welded. Sex packaging bag. 2. A package in which a product is packaged in a plastic bag made of a thermoplastic resin film, which has a cut notch whose tip reaches the inside of the bag at the opening portion, and the edge of the cut notch is welded. An easily openable package characterized by the following.