JPH0744729U - Reclosable packaging bag - Google Patents

Abstract

(57) [Summary] [Purpose] The zipper part for reclosing cannot be damaged by cutting when opening. [Structure] On a plastic film 11 located in the middle of a laminated film 2, a notch 1 provided on a side heat seal portion 4 on the same surface as the surface of the plastic film.
A narrow opening rough surface portion 9 including a line connecting 5 is provided,
The rough surface portion 9 for opening is formed by a deep scratched portion 9b at the center including a line connecting the notches and shallow scratched portions 9a located on both sides of the deep scratched portion 9b at the center.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reclosable packaging bag in which a zipper portion provided inside an opening end is not damaged when opened along a straight line connecting a notch provided in a side heat seal portion.

[0002]

[Prior art]

 A commonly used reclosable packaging bag is constructed by providing a zipper part for opening and closing the opening inside the opening end and heat-sealing the opening end side from the zipper part. . To take out the contents enclosed in the reclosable packaging bag, cut the gap between the zipper part and the heat seal part of the reclosable packaging bag with a cutting tool or tear by hand to open. After taking out a certain amount of the contents enclosed in the reclosable packaging bag, close the zipper part of the reclosable packaging bag to reclose the contents.

The reclosable packaging bag, particularly the reclosable packaging bag that encloses foods, is required to have oxygen barrier property and heat resistance in the packaging bag body. A laminated film composed of a polyester film, an aluminum foil and an unstretched polypropylene film and a laminated film composed of a stretched nylon film and an unstretched polypropylene film are used.

A reclosable packaging bag made of a laminate film that is hard to tear must use a cutting tool such as a knife or scissors to cut between the zipper part and the heat seal part. If you do not have a knife or scissors, you have to get them.

In order to open the reclosable packaging bag without using a cutting tool such as a knife or scissors, a notch is provided at a portion to be cut of the side heat seal portion of the reclosable packaging bag. An attempt is made to open the sealed part from a part, or a tape of the stretched film is attached to the part to be cut, and the cut direction of the stretched film is used to open the sealed part from the part. Things are being developed.

[0006]

[Problems to be solved by the device]

 The reclosable packaging bag with the notch on the side heat seal part can be opened from the notch provided on the side heat seal part, but the cutting line from the notch of the side heat seal part at opening is It may not be parallel to the zipper part, but may bend in the middle part and damage the zipper part.

[0007] Furthermore, in the reclosable packaging bag to which the tape of the stretched film is attached, the tape attaching step is an additional step in the manufacturing process, so the attaching process is complicated and the cost is high. When cutting along the tape, the cutting line may come off the tape and damage the zipper.

The present invention has been made in view of the above points, and can be easily opened without using a cutting tool, and by opening along the straight line connecting the notches provided in the side heat seal portion, It is an object of the present invention to provide a reclosable packaging bag that does not damage the zipper part.

[0009]

[Means for Solving the Problems]

 The reclosable packaging bag of the present invention is provided with a zipper part for opening and closing the opening of the packaging bag body in which both sides and one end are heat-sealed, and the opening end is located closer to the end than the zipper part. In a re-closeable packaging bag provided with a heat-sealing part for closing the packaging bag body, the packaging bag body is formed of a laminated film obtained by laminating a base film and at least two plastic films, and each side portion of the packaging bag body. Provide a notch between the zipper part of the heat seal part and the heat seal part so that it is located on the straight line, and the notch provided in the side heat seal part is attached to the plastic film located in the middle of the laminated film. A narrow opening rough surface including a line connecting straight lines is provided, and this opening rough surface is deep in the center and deep in the center including the line connecting the notches. It characterized in that it is formed in a shallow wound portion located on either side of the part.

[0010]

[Action]

 In the reclosable packaging bag of the present invention, a notch straight line is formed at the center of the narrow opening rough surface portion formed so as to include a line connecting the notches provided in the side heat seal portion of the packaging bag body. Since a deep scratched part including the line connecting with is provided, this deep scratched part acts as a cutting guide part when opening, and when opening the packaging bag body, from the one notch to the other notch, the rough surface forming part for opening is formed. Cut along a straight line along the cutting line so that the cutting line will not bend at the middle part and damage the zipper part.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which the reclosable packaging bag according to the present invention is applied to a self-supporting reclosable packaging bag for retort food. This self-supporting reclosable packaging bag 1 comprises a packaging bag body 2 And the bottom portion 3. The bottom portion 3 is formed by placing a laminated film piece folded in two between the laminated film pieces forming the packaging bag body 2 so that the bent portion 3a is inserted and heat-sealing to integrally bond to the packaging bag body 2. To be done. That is, the packaging bag body 2 and the bottom portion 3 are joined to each other by the side heat seal portions 4 and 4 and the bottom heat seal portion 5. The upper openings 6, 7 of the self-standing reclosable packaging bag 1 are heat-sealed after filling the contents to form a heat-sealed portion.

The packaging bag main body 2 has a zipper portion 8 at the upper end so as to connect the side heat seal portions 4 and 4, and a narrow opening rough surface at a position on the end side of the zipper portion 8. The part 9 is formed. The zipper portion 8 is composed of an engaging rib formed on one laminated film piece forming the packaging bag body 2 and an engaging groove formed on the other laminated film piece, and provided on one laminated film piece. The engagement rib is engaged with the engagement groove provided in the other laminated film piece to form a sealing portion for reclosing the upper opening 6.

The laminate film forming the packaging bag body 2 is made by laminating the base film 10, the intermediate film 11 and the cast polypropylene film 12, as shown in FIG. 2, and is positioned on the inner surface side. The zipper portion 8 is formed on the inner surface of the cast polypropylene film 12. In FIG. 2, only one engaging rib of the zipper portion 8 is shown.

The opening rough surface portion 9 is provided on the intermediate film 11 of the laminated film, as shown in FIGS. 2 and 3. The narrow opening rough surface portion 9 is formed of a deep scratched portion 9b in the central portion and shallow scratched portions 9a, 9a located on both sides of the deep scratched portion 9b in the central portion. The rough surface portion 9 for unsealing has the deep scratched portion 9b at the center thereof located on the straight line connecting the notches 15 and 15 provided in the side heat seal portion 4, and the side heat seal portions 4, 4 of the packaging bag body 2. It is located between.

When the self-supporting reclosable packaging bag 1 is opened to take out the enclosed contents, a notch provided on one side heat seal portion 4 of the self-supporting reclosable packaging bag 1 When both sides of 15 are held by hand and a force is applied in a direction away from each other, a break occurs from this notch 15. The cutting line extends from the notch 15 to the rough surface portion 9 for opening, and when a force in the cutting direction is further applied, the cutting line extending to the rough surface portion 9 for opening extends along the deep scratched portion 9b of the rough surface portion 9 for opening. As a result, the notch 15 provided on the other side heat seal portion 4 is reached, and the self-standing reclosable packaging bag 1 is opened. As a result, the contents enclosed in the self-supporting reclosable packaging bag 1 can be taken out. In this case, the deep scratched portion 9b provided on the rough surface portion 9 for opening acts as a guide portion for the cutting line, the cutting line extends along the deep scratched portion 9b provided on the rough surface portion 9 for opening, and the cutting line is opened. Since it does not shift from the rough surface portion 9 to another portion, the cutting line does not damage the zipper portion 8. When the contents to be taken out from the self-supporting reclosable packaging bag 1 remain, the contents can be resealed by closing the zipper portion 8 of the self-supporting reclosable packaging bag 1.

Although the laminate film forming one surface of the reclosable packaging bag main body has a three-layer structure in the above-described embodiment, for example, as in a packaging bag for retort food, a laminate film and an aluminum foil are unstretched. In the case of a 4-layer structure composed of a polypropylene film, the rough surface portion for opening is formed in the intermediate layer in contact with the aluminum foil located in the middle of the laminated film.

[0018]

[Effect of device]

 As described above, according to the present invention, the unsealing rough surface portion is provided on the plastic film located in the middle of the laminated film forming the packaging bag body, and the unsealing rough surface portion is provided with the deep scratched portion at the center. It is composed of shallow scratches located on both sides of the central part, and by providing notches corresponding to the deep scratches in the central part of the rough surface for opening of the side heat-sealing part of the packaging bag body, the rough opening part is opened. The deep scratched part in the center of the surface acts as a guide for the cutting line, and the cutting line during opening extends along the rough surface for opening and does not come off from here, so the zipper part 8 is damaged by the cutting line. Never be.

[Brief description of drawings]

FIG. 1 is a view showing a state before filling the contents of a reclosable packaging bag according to the present invention.

FIG. 2 is a cross-sectional view of a laminated film that constitutes a reclosable packaging bag.

FIG. 3 is a view showing a rough surface portion for opening provided in an intermediate layer of a laminate film.

[Explanation of symbols]

 1 Resealable packaging bag 2 Packaging bag body 4 Side heat seal part 9 Rough surface for opening 9a Shallow scratched part 9b Deep scratched part 15 Notch

Claims (1)

[Scope of utility model registration request] 1. A zipper part for opening and closing an opening of a packaging bag body having both sides and one end heat-sealed, and a heat-sealing part for closing the opening end on the end side of the zipper part. In the reclosable packaging bag provided with, the packaging bag body is formed of a laminate film obtained by laminating a base film and at least two plastic films, and a zipper portion and heat of each side heat seal portion of the packaging bag body. A notch is provided so that it is located on a straight line between the seal part and the plastic film, which is located in the middle of the laminated film. The rough surface for opening is provided, and the rough surface for opening is located on both sides of the deep scratched part in the central part including the line connecting the notches with the deep scratched part in the central part. Re enclosed self standing packaging bag characterized by being formed in a shallow wound portion.