JPH09118343A - Reclosable packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open/close a bag by a zipper piece after the bag is unpacked. SOLUTION: Widths of seats 3a, 4a of a pair of zipper pieces 3, 4 are made to be different, the seats 3a, 4a are fixed to a packaging bag body with unsealed parts 8, 9 left at an opening end side rim so that opening end rims on a surface and a rear of the bag body at the time of opening are at different positions, and zippers 3b, 4b of the pair of zipper pieces 3, 4 are easily opened/closed with an opening end found.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclosable packaging bag that can be easily opened and closed by a zipper piece after opening.

[0002]

2. Description of the Related Art Since powdered foods such as instant coffee and instant cocoa are not consumed by one opening of a packaging bag, they are marketed in a reclosable packaging bag. The reclosable packaging bag is composed of a packaging bag body whose both sides and one end are heat-sealed, and a pair of zipper pieces fixed to a portion of the inner surface of the packaging bag body near the open end. The pair of zipper pieces includes a zipper piece having a male zipper portion on the center line in the width direction of the pedestal portion and a zipper piece having a female zipper portion on the center line in the width direction of the pedestal portion.

To take out the contents enclosed in the reclosable packaging bag, the zipper piece of the reclosable packaging bag is cut between the heat seal portion and the zipper portion of the zipper piece which is engaged is separated. The opening of the zipper is performed by opening the opening, and the part of the contents enclosed in the reclosable packaging bag is taken out again by engaging the zipper portion of the zipper piece to close the opening.

[0004]

Since the pair of zipper pieces provided on the reclosable packaging bag have the same pedestal width, the zipper piece fixed to the reclosable packaging bag has a pedestal portion of the same. The edges are collinear. Therefore, when the reclosable packaging bag is cut between the zipper piece and the heat seal portion, the portion located closer to the open end than the pedestal portion of the zipper piece of the reclosable packaging bag has almost the same length, This part, which is the open end of the reclosable packaging bag, is in contact with each other because the zipper parts of the zipper pieces are engaged with each other and closed, and it is difficult to find and grasp the open end of this part. Therefore, the reclosable packaging bag is difficult to open. This is the same when the zipper portions of the zipper pieces are engaged with each other and the reclosable packaging bag that has been reclosed is resealed. The present invention has been made in view of the above points, and an object of the present invention is to provide a reclosable packaging bag that can be easily opened and closed by a zipper piece after opening.

[0005]

In the reclosable packaging bag of the present invention, the width of the pedestal portions of the pair of zipper pieces is different, and the pedestal portions are left unsealed at the edges on the opening end side. Since it is fixed to the main body, the opening edges of the front and back sides of the packaging bag body at the time of opening should not be positioned on the same line, and the opening ends of the packaging bag body should be found and the zipper part of the pair of zipper pieces should be opened. Easy to do. By leaving the unsealed portion in the pedestal portion, it is possible to prevent the pedestal portion from melting when the zipper piece is welded to the packaging bag body.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a reclosable packaging bag according to the present invention. This self-supporting reclosable packaging bag 1 comprises a packaging bag body 2 and
It is composed of a pair of zipper pieces 3 and 4 (FIG. 2) fixed to a portion of the inner surface of the packaging bag body 2 near the open end.

The packaging bag body 2 is, as shown in FIG.
The two laminated films 2a and 2b are superposed and heat-sealed on both side portions 5 and 5 and the lower end portion 6 so that the entire shape becomes a rectangular shape as shown in FIG. The open end 7 of the packaging bag body 2 is heat-sealed after enclosing the contents. The packaging bag body 2 has both sides 5, 5
There is also a case where the open end 7 is heat-sealed and the lower end 6 is heat-sealed after the contents are enclosed.

As shown in FIG. 2, one zipper piece 3 of the pair of zipper pieces is formed by providing a female zipper portion 3b on the center line in the width direction of the pedestal portion 3a, and the other zipper piece 4 is formed. , A male zipper portion 4b is provided at a position deviated from the center line in the width direction of the pedestal portion 4a. That is, the pair of zipper pieces 3 and 4 are positioned so that the edge portions of the base portion 3a and the base portion 4a form a step when the female zipper portion 3b and the male zipper portion 4b are engaged. In the embodiment shown in FIG. 2, the width of the pedestal portion 4 a of the zipper piece 4 is equal to the width of the pedestal portion 3 of the zipper piece 3.
The width of the pedestal portion 4a of the zipper piece 4 may be smaller than the width of the pedestal portion 3a of the zipper piece 3, although it is larger than the width of a.

As shown in FIG. 2, the zipper piece 3 is fixed to the inner surface of the packaging bag body 2 on the opening end side by welding means, leaving an unsealed portion 8 at the opening end side edge of the pedestal portion 3a. The width of the unsealed portion 8 is about 0.5 to 2.0 mm. By forming the unsealed portion 8, when the zipper piece 3 is welded to the inner surface of the packaging bag body 2, the edge of the pedestal part 3a is melted and crushed, whereby the zipper piece 3 is torn when opened. There is no end. Similarly, a zipper piece 4
Also, it is fixed to the inner surface of the packaging bag body 2 on the opening end side by welding means leaving an unsealed portion 9 at the opening end side edge of the pedestal portion 4a. The width of the unsealed portion 9 is about 0.5 to 2.0 mm.

The zipper piece 3 and the zipper piece 4 are in the state where the female zipper portion 3b and the male zipper portion 4b are fitted, and the unsealed side edge of the base portion 3a and the base portion 4a.
The distance L from the unsealed side edge is about 5 mm.

On the other hand, notches 10 and 10 for opening are provided between the zipper piece 3 and the heat seal portion 7 of the side heat seal portions 5 and 5 of the self-supporting reclosable packaging bag 1. There is. In addition, near the notch 10, there is provided an indicator 11 that indicates the cutting direction when opening.

As shown in FIG. 3, the laminated film 2a forming the packaging bag body 2 is a linear low density polyethylene film 12 having a thickness of 50 microns, an aluminum foil 13 having a thickness of 7 microns, and a thickness of 20 microns. Low density polyethylene film 14 and a thickness 12 provided with a printing surface 15
It is made by laminating a micron polyester film 16. The zipper piece 3 is welded to the linear low-density polyethylene film 12 located on the inner surface side of the laminate film 2a. Laminated film 2b
Has the same structure as the laminate film 2a, and the zipper piece 4 is welded to the linear low-density polyethylene film 12. The laminate film 2a may be formed by laminating a linear low-density polyethylene film having a thickness of 60 μm and a biaxially stretched polyester film having a thickness of 12 μm.

Therefore, in order to open the reclosable packaging bag 1 to take out the enclosed contents, the reclosable packaging bag 1
When both sides of the notch 10 provided on the one side heat seal portion 5 are held by hand and a force is applied so as to cut in the cutting direction indicated by the indicating portion 11, the fracture line generated from the notch 10 is Resealable packaging bag 1 extending in the cutting direction of the portion 11
Extends to the front and back films.

The cutting line extending to the surface film of the reclosable packaging bag 1 extends laterally along the unsealed side edge of the pedestal portion 3a of the zipper piece 3 to cut the surface film of the reclosable packaging bag 1. To do. The cutting line extending to the back film of the reclosable packaging bag 1 extends laterally along the unsealed side edge of the pedestal portion 4a of the zipper piece 4, and the reclosable packaging bag 1
Cut the back film of. Pedestal part 3 of the zipper piece 3
Since the unsealed side edge of a and the unsealed side edge of the pedestal portion 4a of the zipper piece 4 are located at different levels, the cut edge of the front surface film and the cut edge of the back surface film are at different positions. FIG. 4 shows the re-closeable packaging bag 1 that has been cut. In this reclosable packaging bag 1, since the edge of the cut surface film and the edge of the back surface film are at different positions, it is easy to find the open end and open the zipper portions of the pair of zipper pieces. You can In this way, the edge of the cut front film and the edge of the back film of the reclosable packaging bag 1 are set at different positions, so that even when the pair of zipper pieces is closed again, It becomes easy to open the zipper part.

[Brief description of the 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 sectional view taken along the line 2-2 in FIG. 1;

FIG. 3 is a cross-sectional view of a laminated film that constitutes a reclosable packaging bag.

FIG. 4 is a view showing a state after opening the reclosable packaging bag according to the present invention.

[Explanation of symbols]

 1 Resealable packaging bag 2 Packaging bag body 3 Zipper piece 3a Base part 3b Female zipper part 4 Zipper piece 4a Base part 4b Female zipper part 5 Side heat seal part 8 Unsealed part 9 Unsealed part

Claims (5)

[Claims] 1. A packaging bag body having both sides and one end heat-sealed, and a pair of zipper pieces having a zipper portion and a pedestal portion and fixed to a portion of the inner surface of the packaging bag body near an open end. Then, in the reclosable packaging bag in which the opening end of the packaging bag body is heat-sealed after filling the contents, the width of the pedestal portion extending to at least one side from the zipper portion of the zipper piece has different lengths, and each zipper piece is The pedestal portion having a different width is located on the opening end side of the packaging bag body, and the pedestal portion is fixed to the packaging bag body leaving an unsealed portion at the edge near the opening end of the packaging bag body. Flexible packaging bag. 2. The reclosable packaging bag according to claim 1, wherein a notch is provided between the zipper piece of the side heat seal portion and the open end heat seal portion. 3. The reclosable packaging bag according to claim 2, wherein a cutting direction indicator is provided near the notch of the reclosable packaging bag. 4. The reclosable packaging bag according to claim 1, wherein the width of the unsealed portion of the base portion of the zipper piece is 0.5 to 2.0 mm. 5. The reclosable packaging bag according to claim 1, wherein the pedestal portion of the zipper piece extending from the zipper portion to one side has a width difference of about 5 mm.