JP4676611B2 - Easy-open packaging bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pillow-type easy-open packaging bag that can be easily formed by tearing from the end edge of a palm-welded thermal bonding portion.
[0002]
[Prior art]
Conventionally, as a pillow-type easy-open packaging bag that is opened by tearing the bag obliquely in the direction from the palm heat-bonding portion to the edge heat-bonding portion, as described in Japanese Utility Model Publication No. 62-122060, In a configuration in which a tape made of a uniaxially stretched film is adhered along a planned tear line including a seal surface edge portion of the packaging bag, and at least one tear cut is provided at an edge portion where the seal surface and the film are superposed. There is a known configuration in which the expected tear line of the gusset-type joint-attached bag is formed so as to make an elevation angle from the edge of the joint-attached surface toward the side of the bag.
However, in the case of a bag having the above-described configuration, a process of closely attaching a tape made of a uniaxially stretched film along the planned tear line including the edge of the sealing surface of the sealing packaging bag is required. However, there is a drawback in that the process of closely attaching the tape made of a uniaxially stretched film to the surface of the bag becomes very complicated and the production efficiency becomes difficult, resulting in high costs. In addition, there is a drawback that a tape made of a uniaxially stretched film may not tear along the tape unless it is strongly bonded so as not to be peeled off from the bag surface.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a pillow-type easy-open packaging bag that can be easily formed by tearing from an opening start portion of a jointed heat-bonding portion.
[0004]
[Means for Solving the Problems]
Gusseted pillow type consisting of a laminated body having a base material layer and a heat-adhesive resin layer , formed by a jointed heat-bonding part and edge heat-bonding part, and formed by folding parts formed by creases provided on both sides. An opening start portion is provided at a position on the one end edge heat bonding portion side of the joint heat bonding portion , and extends obliquely from the opening start portion toward both side ends of the bag and passes through the folding portion. The cut line formed in this way is formed so as to penetrate at least the base material layer of the laminate, and the cut line has a region near the fold of the fold portion as a cut line non-formed portion, and the inside of the fold portion By the configuration where the scar group is formed respectively in the one end edge heat bonding part side region of the cut line of the cut edge line on the opening start part side of the cut line , The back side of the bag is slanted toward the both ends from the opening start part of the joint heat bonding part. Tear, since it is possible to form a large opening in the triangular shape with the apex open trigger, it can be taken out the contents easily from the opening.
[0005]
Moreover, it is a gusset pillow type bag in which folding parts are formed on both sides, and the cut line is formed so as to extend obliquely from the opening start part toward both sides of the bag and pass through the folding parts. By tearing the back side and the folding part of the bag from the opening start part and forming a large opening across the trunk part of the bag, it can be easily taken out even when the contents stored are large. it can.
[0006]
In addition , the area near the fold of the fold line is a crease line non-forming part, and the edge of the cut line in the fold part on the opening start side is one end of the cut line of the edge part. By having a configuration in which the scars are formed in the edge thermal bonding part side area, since there is no score line formed in the area near the fold of the bag, from the point that becomes a crease when making a pillow type bag It is possible to prevent the laminate from tearing along the score line. Moreover, even if the cut line non-formation part is formed in the cut line, it is the edge part on the opening start part side of the cut line in the folding part, and one edge thermal bonding part side of the cut line of the edge part Since the scar group is formed in the region, the tear line does not deviate from the cut line and can be opened along the cut line .
[0007]
In the above-described easy-open packaging bag, when the cut line is formed so as to penetrate the laminated body, tearing of the laminated body becomes extremely easy, so that it can be easily opened with a weak force .
[0008]
In the above easy-open packaging bag, the opening start portion is configured such that a plurality of scars are formed on the laminate, so that the laminate can be easily started to tear from the opening start portion, and then torn along the score line. Can be opened.
[0009]
In the easy-open packaging bag described above, the laminate is formed along the cut line by forming a plurality of cut lines with a predetermined interval in a state in which the cut line is formed by a laterally S-shaped cut and sequentially shifted in the horizontal direction. When tearing and opening, the tear line can be opened without deviating from the score line.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing an opened state of the embodiment, and FIG. 3 is a plan view showing a laminate for producing the easy-open packaging bag of the embodiment, FIG. 4 is an enlarged plan view showing details of the score line of the embodiment, FIG. 5 is a diagram showing another shape of the score constituting the score line, 1 is a joint thermal bonding portion, 1 ′ is a joint thermal bonding region, 2a , 2b is the edge thermal bonding area, 2a ', 2b' are the edge thermal bonding area, 3a, 3b, 3c are creases, 4 is the cut line, 5 is the opening start part, 6 is the cut line, 7a, 7b are The cut line non-formation part, 8a and 8b represent scar groups, and 9 and 9 ′ represent cuts, respectively.
[0011]
Embodiment of this invention consists of a laminated body which has a base material layer and a thermoadhesive resin layer, provides a folding part by crease | folds 3a, 3b, 3c in both sides, and the palm heat-bonding part 1 and edge thermal-bonding part A gusseted pillow type bag formed by 2a and 2b, with an opening start portion 5 provided in the jointed thermal bonding portion 1 close to the edge thermal bonding portion 2a, from the inside of the opening start portion 5 toward both side edges of the bag. The cut line 4 extending obliquely toward the edge thermal bonding portion 2a and passing through the folding portions on both sides is formed so as to penetrate at least the base material layer of the laminate. In the embodiment, the position where the opening start portion 5 is provided may be appropriately determined depending on the position of the opening to be formed and the inclination angle of the score line 4. The opening start portion 5 is formed with a scar group penetrating the laminated body so as to easily tear the laminated body.
[0012]
The tearing of the gusset pillow type bag of the embodiment is started from the opening start portion 5, and the laminated body on the back side of the bag on which the palm heat bonding portion 1 is formed along the cut line 4 is then attached to the edge heat bonding portion 2 a. As shown in FIG. 2, a large opening can be formed in the vicinity of the edge thermal bonding portion 2a of the gusset pillow type bag by tearing obliquely to the side and tearing the laminated body of the folded portions on both sides obliquely. In the opened state, the laminated body on the front side of the bag is left, and the laminated body on the back side and the folded part on both sides of the bag is torn and can form a large opening, so the individually packaged contents Even if the object is large, it can be easily taken out from the formed opening. In the embodiment, the cut line is formed in the laminated body that forms the back side and the folding parts on both sides, but the cut line is formed over the entire circumference so as to be continuous with the laminated body on the front side, and one end of the bag. You may make it completely cut off the side.
[0013]
The continuous laminated body for producing the gusset pillow type bag of the embodiment is as shown in FIG. 3, has a predetermined width for producing the gusset pillow type bag, and forms folding portions on both sides of the bag. For this purpose, folds 3a, 3b, 3c are provided, and a heat-bonding region 1 'having a predetermined width is provided at both end portions of the laminate, and the cut line 6 is spaced at an interval corresponding to the vertical length of the bag. The edge thermal bonding region 2b 'is provided at the upper part with the cut line 6 in between, the edge thermal bonding region 2a' is provided at the lower part, and the position is separated from the lower edge of the edge thermal bonding region 2a 'by a certain distance. A pair of opening start portions 5 are formed in the jointed thermal bonding regions 1 'on both sides of the sheet, and the folds are formed to extend obliquely from the inner side of the respective opening start portions 5 to the edge thermal bonding region 2a' side to form folds. The cut line 4 reaching 3c is formed.
[0014]
The joint heat-bonding regions 1 'on both sides of the continuous laminate in which the score line 4 shown in FIG. 3 is formed are heat-bonded to form the joint heat-bonding portion 1, and the folds 3a and 3c are folded outward. At the same time, the crease 3b is folded inwardly to form a V-shape, and folds are formed on both sides, and the edge thermal bonding region 2b 'is thermally bonded to form the edge thermal bonding part 2b. A gusset pillow type bag is produced by cutting. By storing the contents individually wrapped in the bag and thermally bonding the edge thermal bonding region 2a ′ to form the edge thermal bonding portion 2a, the gusset pillow type bag of the embodiment shown in FIG. 1 is obtained.
[0015]
The details of the cut line 4 formed in the laminate are as shown in FIG. 4, and the cut line 4 has a crease 3a and a crease 3b in the vicinity of the cut line non-formed part 7a and the cut line non-formed part 7b. In addition, the scar group 8a and the scar group 8b are formed in one edge thermal bonding part side region of the cut line of the edge line of the cut line 4 which starts tearing from the cut line non-formed part 7a and the cut line non-formed part 7b. ing. By forming the scar group 8a and the scar group 8b as shown in FIG. 4, after the tear reaches the cut line non-formed part 7a and the cut line non-formed part 7b, from the edge of the interrupted cut line 4 When tearing continuously, the tear line does not deviate from the cut line 4. Further, in the step of making a gusset pillow type bag using the laminate in which the cut line 4 shown in FIG. 3 is formed, the folds 3a and folds 3b for forming folds on both sides of the bag are shown. Since the score line 4 is not formed in the vicinity, the laminate can be prevented from tearing along the score line 4 when the folded body is folded at the folds 3a, 3b, and 3c to form the folded portion. .
[0016]
The cut line 4 in the embodiment has a configuration in which the horizontal S-shaped cuts 9 are regularly arranged in a state of being shifted outward by a certain dimension in the horizontal direction. The shape of the cuts and the arrangement of the cuts are not particularly limited as long as it is a shape that tears the gusset pillow type bag from the opening start portion 5 without tearing along the cut line 4. It is preferable to use the transverse S-shaped cut 9 or the transverse Z-shaped cut 9 ′ shown in FIG.
[0017]
The score line 4 and the scar groups 8a and 8b in the embodiment may be formed in a state of penetrating the base material layer of the laminate having the base material layer and the heat-adhesive resin layer, or penetrate the laminate. It can also be formed in a state. When the heat-adhesive resin layer constituting the laminate can be made thin, it is preferable to form a score line penetrating the base material layer of the laminate, and the heat-adhesive resin layer constituting the laminate needs to be thickened. In some cases, it is preferable to form a score line penetrating the laminate. When a score line is formed in a state of penetrating the base material layer of the laminate or in a state of penetrating the laminate, the gas barrier property of the laminate is reduced. However, the easy-open packaging bag of the present invention Since it is used as a bag for exterior packaging, there is no problem with a slight decrease in gas barrier properties of the laminate.
[0018]
The base material layer constituting the laminate of the embodiment includes biaxially stretched polyethylene terephthalate, biaxially stretched polypropylene, biaxially stretched plastic film such as biaxially stretched nylon, and thin paper such as pure white, imitation paper, fine paper, and kraft paper. Can be used, and as the heat-adhesive resin layer, polyolefin such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer can be used. By adopting a configuration in which a biaxially stretched plastic film and thin paper are laminated as the base material layer, the rigidity of the laminated body is increased and the bag shape is excellent, so that an exterior bag with excellent design can be obtained. Since the easy-open packaging bag of the present invention is used as an exterior bag for collecting and packaging small sachets individually wrapped with a gas barrier film, it has excellent gas barrier properties as a base material layer constituting a laminate. There is no need to use film.
[0019]
As the structure of the laminate, for example, biaxially stretched polyethylene terephthalate (PET) 12 μm / extruded polyethylene (EC) 15 μm / thin paper 50 g / polyethylene (PE) 15 μm / polyethylene (PE) 15 μm, biaxially stretched polypropylene (OPP) 20 μm / EC15myuemu / Paper 50g / PE15μm / PE15μm, PET12μm / EC15μm / Paper 50 g / unstretched polypropylene (CPP) 20μm, OPP20μm / EC15μm / Paper 50g / CPP20μm, PET12μm / EC15μm / Paper 50g / PE40μm, PET12μm / EC15μm / Paper 50g / CPP40μm The cut line is formed in the underlined layer.
[0020]
【The invention's effect】
A gusset pillow type bag made of a laminate having a base material layer and a heat-adhesive resin layer and formed by a palm heat-bonding portion and an edge heat-bonding portion. By forming the cut line extending obliquely from the opening start portion toward the both side edges of the bag so as to penetrate at least the base material layer of the laminate, the opening By tearing the back side obliquely toward both side ends and forming a large triangular opening having the opening start portion as a vertex, the contents can be easily taken out from the opening.
[0021]
In the easy-open packaging bag described above, the pillow type bag is a gusset pillow type bag in which folds are formed on both sides, and the cut line extends obliquely from the opening start part to both side edges of the bag, and the folds are over. By having the structure formed in such a way, the back side and the folding part of the bag can be torn from the opening start part, and a large opening across the trunk part of the bag can be formed. Even if the object is large, it can be easily removed.
[0022]
In the above-described easy-open packaging bag, when the cut line is formed so as to penetrate the laminated body, tearing of the laminated body becomes extremely easy, so that it can be easily opened with a weak force.
[0023]
In the above easy-open packaging bag, the opening start portion is configured such that a plurality of scars are formed on the laminate, so that the laminate can be easily started to tear from the opening start portion, and then torn along the score line. Can be opened.
[0024]
In the above easy-open packaging bag, the area near the fold of the fold portion of the gusset pillow type bag is defined as the non-cut line forming part, and opening of the cut line at the edge in the opening direction of the cut line non-forming part is started. By forming a scar group in each of the edge-side edge portions and one edge thermal bonding portion-side region of the edge portion, a score line is formed in the vicinity of the fold of the bag. Is not formed, it is possible to prevent the laminate from tearing along the score line from the crease at the time of making the pillow type bag. Moreover, even if the cut line non-formed part is formed in the cut line, the scar line is formed in the outer region of the edge of the cut line in the opening direction of the cut line non-formed part. It can be opened along the score line without deviating.
[0025]
In the easy-open packaging bag described above, the laminate is formed along the cut line by forming a plurality of cut lines with a predetermined interval in a state in which the cut line is formed by a laterally S-shaped cut and sequentially shifted in the horizontal direction. When tearing and opening, the tear line can be opened without deviating from the score line.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a perspective view showing an opened state of the embodiment.
FIG. 3 is a plan view showing a laminate for producing the easy-open packaging bag of the embodiment.
FIG. 4 is an enlarged plan view showing details of a score line according to the embodiment.
FIG. 5 is a view showing another shape of the cut lines forming the cut line.
[Explanation of symbols]
1 Jointed thermal bonding part
2 'gas palm thermal bonding area
2a, 2b Edge thermal bonding
3a ', 3b' edge thermal bonding area
3a, 3b, 3c Fold 4 Cut line 5 Opening start part 6 Cut line
7a, 7b Cut line non-formation part
8a, 8b Scar group 9, 9 'cut

Claims (4)

Gusseted pillow type consisting of a laminated body having a base material layer and a heat-adhesive resin layer , formed by a jointed heat-bonding part and edge heat-bonding part, and formed by folding parts formed by creases provided on both sides. An opening start portion is provided at a position on one edge thermal bonding portion side of the joint thermal bonding portion , and the bag extends obliquely from the opening start portion toward both side ends of the bag and passes the folding portion. The score line formed in such a manner is formed so as to penetrate at least the base material layer of the laminate, and the score line is a region in the vicinity of the fold of the fold portion as a score line non-forming portion, It consists of an end edge part of the cut line in the folding part on the opening start part side, and a group of scars is formed in the one edge thermal bonding part side region of the cut line of the edge part. Easy-open packaging bag characterized by. 2. The easy-open packaging bag according to claim 1, wherein the cut line is formed so as to penetrate the laminate . The easy-open packaging bag according to claim 1 or 2, wherein the opening start portion has a configuration in which a plurality of scars are formed in the laminate . 4. The easy cut according to claim 1 , wherein the cut line has a configuration in which a plurality of the cut lines are formed at a predetermined interval in a state of being shifted in the horizontal direction and formed by horizontal S-shaped cuts. 5. Opened packaging bag.

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