JP2003300537A - Easily openable packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily openable packaging bag in which the bag is opened by releasing an end edge stuck part from a release starting part and a laminated body of either one of the surface and the back surface constituting the packaging bag is torn along cutting lines to form an opening with an arbitrary size in the up and down direction of the packaging bag. <P>SOLUTION: The easily openable packaging bag has a constitution wherein the bag consists of a laminated body provided with a base material layer and a heat bonding resin layer and is a pillow-type bag formed by a hand-clasping- type heat bonding part and an end edge heat bonding part, which is at least releasable, and the release starting part is formed along the outer end of at least one end edge heat bonding part. Two cutting lines are formed at a definite interval over the whole length in the parallel direction to the hand-clasping-type heat bonding part on either one of the surface or the back surface laminated bodies constituting the packaging bag corresponding to the release starting part, and notches are formed on the end edges of the cutting lines at the release starting parts. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to peel off a heat-bonding portion from a peeling start portion and cut either of the front and back laminated bodies constituting a packaging bag along a score line to form an opening. An openable packaging bag.

[0002]

2. Description of the Related Art Conventionally, as an easily openable pillow type bag that can be easily torn open in a longitudinal direction, for example, a pillow type bag as described in Japanese Utility Model Publication No. 60-13789 can be used at a predetermined position. There is known a bag body that is easy to open and has a configuration in which an opening line formed of a continuous line is provided in the vertical direction and a V notch is provided inside the opening line in the seal portion. However, in the case of the packaging bag of this configuration, one side end of the pillow type bag is cut off and opened, and since an opening is formed at the side end of the bag, the contents in the opened state There is a problem that it overflows from the opening, and it has a drawback that it is not suitable for the purpose of dispensing contents when placed on a table or the like.

[0003]

DISCLOSURE OF THE INVENTION An object of the present invention is to peel off an edge heat-bonding portion of a packaging bag from a peeling start portion and to open it.
Easy-open packaging that can be formed with an arbitrary size in the vertical direction at the center of the packaging bag in the left-right direction by cutting one of the front and back laminates that make up the packaging bag along the score line. Is to provide a bag.

[0004]

[Means for Solving the Problems] A laminate comprising a base material layer and a heat-adhesive resin layer is formed, and at least the edge heat-adhesive portion is peelable and is formed by a palm-shaped heat-adhesive portion and an edge heat-adhesive portion. A pillow type bag, wherein a peeling start portion is formed along an outer edge of at least one edge thermal bonding portion, and a back surface on which a gastric thermal bonding portion that forms a packaging bag is formed corresponding to the peeling starting portion. Two cut lines are formed on the side laminated body or the front side laminated body at regular intervals over the entire length of the bag in the direction parallel to the joint-sealed heat-bonded portion, and a cut is formed at the edge of the cut line at the peeling start portion. With this structure, the laminate is torn in the longitudinal direction along the two cut lines from the two cuts formed in the laminate while peeling the edge heat-bonded portion from the peeling start portion. As a result, the width sandwiched between the two scoring lines allows for vertical movement. It is possible to form the openings of the length of the can and the contents removed from the opening.
Also, by tearing over the entire length in the vertical direction,
The laminate sandwiched between the two score lines can be completely cut off to form a large vertical opening in the center of the packaging bag, so the packaging bag with the opening can be placed on a table or the like. The contents can be easily dispensed and taken out from this opening when placed.

In the above-mentioned easy-open packaging bag, the width of the edge heat-bonding portion is narrowed by a certain length at the center of the edge heat-bonding portion at the left and right of the edge heat-bonding portion so that the edge heat-bonding portion has a narrow width. By having a U-shaped configuration on the outer end side,
From the peeling start portion, it becomes easy to grasp the front and back laminated bodies constituting the packaging bag and pull them to both sides to open the packaging bag to form the opening.

In the above-mentioned easy-open packaging bag, the cut line is formed in the base material layer of the laminate at a depth within the range of the thickness of the base material layer, so that the base material layer and the heat insulating layer Even when a laminate having a two-layer structure composed of an adhesive resin layer is used, the cut lines do not penetrate the base material layer, so that the formation of the cut lines does not impair the gas barrier property of the packaging bag, and The laminate can be easily torn along.

In the above-mentioned easy-open packaging bag, the laminated body has a structure having an intermediate layer, and the cut lines are formed so as to penetrate the intermediate layer. Even if formed, the gas barrier property of the packaging bag is not deteriorated, and the laminate can be easily cut along the cut line.

In the above-mentioned easy-open packaging bag, the edge heat-adhesive portion has a bonding strength of 100 to 800 g / 15 mm width, whereby the edge heat-adhesive portion is peeled off from the peeling start portion. Can be opened easily.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II of FIG. 1, and FIG. 3 is a line II of FIG.
-II enlarged cross-sectional view, FIG. 4 is a plan view showing a second embodiment of the present invention, FIG. 5 is a plan view showing an unsealed state of the first embodiment, and 2 is a heat-sealed bonded portion, 3, 3 ′. Is the edge heat-bonded part, 4,
4'is a peeling start portion, 5 is a score line, 6 is a notch, 7 is an opening, 10
Is a laminate, 11 is a base material layer, 12 is an intermediate layer, and 13 is a thermoadhesive resin layer.

The first embodiment of the present invention is as shown in FIGS. The planar shape is, as shown in FIG. 1, a base material layer.
A laminated body 10 including an intermediate layer 11, an intermediate layer 12 and a heat-adhesive resin layer 13, and a heat formed by a gas-sealed heat-bonded portion 2 and upper and lower edge heat-bonded portions 3 so that at least the edge heat-bonded portion 3 can be peeled off. It is a pillow type bag with adhesive parts, and the upper and lower edge thermal adhesive parts 3
Of the rear surface side where the peeling start portions 4 that are not heat-bonded are formed at the central portions in the left-right direction of the sheet and the gas-sealing heat-bonding portions 2 that form the packaging bag are formed corresponding to the peeling start portions 4. Two cut lines 5 are formed in the body 10 at regular intervals so as to sandwich the palm-sealed heat-bonded portion 2 over the entire length in the direction parallel to the palm-sealed heat-bonded portion 2, and the cut-line 5 is formed at the peeling start portion 4.
A V-shaped cut 6 is formed in the laminated body 10 on the back surface side at the edge of the.

The cross-sectional structure in the left-right direction of the portion where the peeling start portion 4 is formed in the edge thermal bonding portion 3 of the first embodiment is as follows.
As shown in FIG. 2, the front and back laminated bodies 10 constituting the packaging bag are separated at the peeling start portion 4, and the front and back laminated bodies 10 are easily gripped to peel off the edge thermal bonding portion 3. .
As shown in FIG. 3, the laminate 10 has a base material layer 11, an intermediate layer 12, and a heat-adhesive resin layer 13 in a cross-sectional configuration in a direction orthogonal to the cut line 5 in the edge heat-bonded portion 3 of the first embodiment. It is a laminated structure, and a cut line 5 penetrating the intermediate layer 12 is formed in the laminated body 10 on the back surface side where the gas-sealing heat-bonding portion 2 forming the packaging bag is formed. Since the cut line 5 penetrating the intermediate layer 12 of the laminate 10 is formed, the laminate 10 can be easily torn from the position of the notch 6 along the cut line 5.

The planar shape of the second embodiment of the present invention is shown in FIG.
And is different from the first embodiment except that the peeling start portion 4'is formed along the entire width in the left-right direction along the outer end of the edge thermal bonding portion 3 '. It is a composition. In the second embodiment, the edge heat-bonding portion 3'is linear with a constant width, and the peeling start portion 4'is formed along the entire width in the left-right direction along the outer edge of the edge heat-bonding portion 3 '. Therefore, the hot plate forming the edge heat-bonded portion 3 ′ can be easily manufactured and made into a bag.

In the first and second embodiments, the laminated body constituting the packaging bag has a two-layer constitution comprising a base material layer and a heat-adhesive resin layer, and a score line is formed in the base material layer of the laminated body. It can also be configured. When the score line is formed on the base material layer of the laminate, the score line is formed on the outer surface of the base material layer of the laminate at a depth of 1/2 to 2/3 of the thickness of the base material layer. By forming the score lines at a depth within the range of the thickness of the base material layer, the gas barrier property of the laminate is not impaired.

In the first and second embodiments, the distance between the two cut lines 5 may be arbitrarily set according to the size of the opening to be formed. In the first embodiment, it is preferable that the lateral length of the peeling start portion 4 formed on the edge heat-bonding portion 3 be substantially equal to the distance between the two score lines 5, and The score line 5 may be located at the edge. The vertical length or width of the peeling start portion 4 is preferably 5 to 15 mm. Further, since the heat-adhesive resin layer 13 of the laminated body 10 is formed of the easily peelable resin, the adhesive strength at the edge heat-adhesive portion 3, the edge heat-adhesive portion 3 ′, and the gastric heat-adhesive portion 2 is 100 to 100. It is 800 g / 15 mm and can be peeled off.

To open the easy-open packaging bag of the first embodiment, the front and back laminated bodies 10 separated at the peeling start portion 4 are grasped and pulled to both sides, so that they can be peeled off. Since the laminated body 10 can be cut along the two score lines 5 while peeling off the edge heat-bonded portion 3 which is formed, the area sandwiched between the two score lines 5 as shown in FIG. The laminated body 10 can be cut out to form the opening 7 having an arbitrary length in the vertical direction of the packaging bag. By cutting the laminate 10 along the two score lines 5 by a predetermined length, the opening 7 of an arbitrary size is formed in the upper portion of the packaging bag, and the contents can be taken out. Further, the packaging bag is torn in the vertical direction over the entire length to form a large opening 7 in the central portion in the lateral direction of the packaging bag, and the contents can be dispensed and taken out while being placed on a table or the like. The easy-open packaging bag of the second embodiment can be opened in the same manner as in the first embodiment.

In the first and second embodiments, the shape of the packaging bag is a flat pillow type bag, but it may be a gusset pillow type bag having inward gusset folding portions at both ends. Also in the embodiment, the peeling start portion is formed on the upper and lower edge heat-bonding portions, but it may be formed on only one of the edge heat-bonding portions. Further, as for the notch formed at the edge of the score line, it may be formed only on the back surface side laminated body which constitutes the packaging bag in which the cut line is formed as in the embodiment, or the front and back side laminated body. You may form in. Even if a cut is formed on the front and back laminated bodies, the cut line is formed only on the back surface side laminated body, so cut only the laminated body on which the cut line is formed along the cut line to form the opening. Can be formed. The shape of the notch is also V-shaped in the embodiment, but may be U-shaped or I-shaped. As for the constitution of the score line, when the laminated body is composed of two layers of the base material layer and the heat-adhesive resin layer, it is formed on the outer surface of the base material layer to a depth within the range of the thickness of the base material layer. When is composed of three layers of a base material layer, an intermediate layer, and a thermoadhesive resin layer, it is formed so as to penetrate the intermediate layer.

As a method of forming the score line, when the score line is formed in the intermediate layer of the laminate, a pattern is printed on the film to be the base layer, and the film to be the printed base layer and the intermediate layer are formed. When laminating films by dry lamination or extrusion lamination, the flow of the intermediate layer film by using a cutting blade or the like at a predetermined position corresponding to the pattern printed on the base layer film of the intermediate layer film. It is performed by a method of providing a linear cut line continuous in the direction. When forming a score line on the outer surface of the base material layer at a depth within the range of the thickness of the base material layer, a diamond needle or the like for forming the score line from the reference surface after the laminate is prepared. Using a score line forming tool whose tip protrudes by a predetermined dimension, the outer surface of the base layer at a predetermined position corresponding to the pattern printed on the base layer is brought into contact with the outer surface of the base layer under a constant load and laminated. By running the body, it is possible to form linear cut lines that are continuous in the flow direction of the film serving as the base material layer. Therefore, the process of forming the score lines in the laminate can be simplified, and the cost of the easy-open packaging bag can be reduced.

As the base material layer of the laminate, metal oxide vapor-deposited biaxially oriented polyethylene terephthalate (VMPET),
Metal oxide deposition biaxially stretched nylon (VMON), gas barrier biaxially stretched polypropylene (gas barrier OP
P), gas barrier biaxially stretched nylon (gas barrier ON) and the like can be used. As the intermediate layer, biaxially oriented polyethylene terephthalate (PET), biaxially oriented nylon (ON), biaxially oriented polypropylene (OPP) or the like can be used. As the heat-adhesive resin layer, an easily peelable resin (PR) made of modified polyolefin (modified PO) or the like can be used. As the easily peelable resin, for example, CMPS006
(East cello), TAF650C (East cello), IMX (J film), EP-1 (Gunze), etc. can be used. By forming the heat-adhesive resin layer of the laminate from the above-mentioned easily peelable resin, the adhesive strength of the heat-adhesive portion is 100 to 800 g /
It becomes possible to make it 15 mm, and it is possible to open the packaging bag by peeling the heat-bonding portion from the peeling start portion.

The lamination of the base material layer, the intermediate layer, and the heat-adhesive resin layer can be carried out by dry lamination (DL) using a urethane adhesive or extrusion lamination (EC) using polyethylene or the like. It is preferable that the laminate is laminated by dry lamination since the tearability of the laminate is improved. As for the structure of the laminate, for example, in the case of a three-layer structure, VMPET12
(Print) / DL / PET12 / DL / PR30-50,
VMPET12 (print) / DL / ON15 / DL / PR
30-50, VMPET12 (print) / DL / ON15
/ PE15-25 / PR30-50, barrier ON15
(Print) / DL / PET15 / DL / PR30-50,
Barrier OPP20 (print) / DL / PET15 / DL /
PR30 to 50 etc., and in the case of a two-layer structure, barrier O
PP20 (print) / DL / PR30-50, barrier OP
P20 (print) / PE15-25 / PR30-50, P
ET12 (printing) / DL / EVOH coextrusion PR30-5
It is 0 mag.

[0020]

EFFECT OF THE INVENTION A pillow type bag comprising a laminated body having a base material layer and a heat-adhesive resin layer, and formed by a palm-shaped heat-bonded portion and an edge heat-bonded portion, and at least the edge heat-bonded portion is removable. And a peeling start portion is formed along the outer edge of at least one of the edge heat-bonding portions, and a back side laminate having a gas-sealing heat-bonding portion that forms a packaging bag corresponding to the peeling start portion, or Two cut lines are formed on the surface side laminated body at regular intervals over the entire length of the bag in a direction parallel to the joint thermal bonding portion, and a cut is formed at the edge of the cut line at the peeling start portion. By doing so, the edge heat-bonded portion is peeled from the peeling start portion, and the laminated body is vertically cut along the two cut lines from the two cuts formed in the laminated body to an arbitrary length. It is possible to form an opening of any size by tearing. In addition, by tearing the entire length of the bag in the vertical direction, the laminated body in the area surrounded by the two score lines and the edge heat-bonded portion is cut off to form a vertical opening in the central portion of the packaging bag. Therefore, it is easy to take out and take out the contents from the opening with the packaging bag having the opening placed on the table or the like.

In the above-mentioned easy-open packaging bag, the cut line is formed on the base material layer of the laminate at a depth within the range of the thickness of the base material layer, or the laminate has an intermediate layer. With the configuration in which the cut line is formed so as to penetrate the intermediate layer, the laminate can be easily torn along the cut line, and the gas barrier property of the laminate constituting the packaging bag can be reduced. Absent. Further, since it is not necessary to use a laminate having a structure including a uniaxially stretched film, and the process of forming the score line can be simplified, the cost of the easy-open packaging bag can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line I-I of FIG.

FIG. 3 is an enlarged sectional view taken along line II-II of FIG.

FIG. 4 is a plan view showing a second embodiment of the present invention.

FIG. 5 is a plan view showing an opened state of the first embodiment.

[Explanation of symbols]

2 Gassho thermal bond 3, 3'edge thermal bond 4,4 'Peeling start part 5 score lines 6 notches 7 openings 10 stacks 11 Base material layer 12 Middle class 13 Thermal adhesive resin layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nobuyuki Nakamura             Kyoto, Ukyo-ku, Uzumasa Shangbu-cho, 10 Dai Nippon             Printing Co., Ltd. F term (reference) 3E064 AA08 AA13 BA26 BA30 BA36                       BA55 BB03 BC08 BC18 EA30                       HN06 HP01 HP02

Claims (5)

[Claims] 1. A pillow type bag comprising a laminated body having a base material layer and a heat-adhesive resin layer, wherein the pillow-type bag is formed of a joint heat-bonding portion and an edge heat-bonding portion and at least the edge heat-bonding portion is peelable. And a peeling start portion is formed along the outer edge of at least one of the edge thermal bonding portions, and a back-side laminate in which a gastric thermal bonding portion that forms a packaging bag is formed corresponding to the peeling starting portion. Two cut lines are formed on the body or the front-side laminate at regular intervals over the entire length of the bag in a direction parallel to the gas-sealing heat-bonded portion, and a cut is formed at the edge of the cut line at the peeling start portion. An easy-open packaging bag, which is characterized by being configured as described above. 2. The peeling start portion has a width narrowed by a certain length in the lateral center of the edge heat-bonding portion so that the width of the edge heat-bonding portion is narrowed to the outside of the edge heat-bonding portion. U on the edge
The easy-open packaging bag according to claim 1, wherein the packaging bag is formed in a letter shape. 3. The structure according to claim 1, wherein the cut line is formed in the base material layer of the laminate at a depth within the range of the thickness of the base material layer. Easy-open packaging bag. 4. The laminate according to claim 1, wherein the laminate has an intermediate layer, and the score line is formed so as to penetrate the intermediate layer.
The easy-open packaging bag described in. 5. The adhesive strength of the edge heat-bonded portion is 100 to 100.
A width of 800 g / 15 mm.
The easily-openable packaging bag according to any one of to 4.