JP4372973B2 - Easy-open packaging bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an easy-open packaging bag that can be torn from a cut point and easily torn along a score line.
[0002]
[Prior art]
Conventionally, in an easy-open packaging bag made of a laminate, an opening means such as a score line is formed in the laminate, and a notch for starting tearing is formed at the edge of the opening means such as a score line. The thing of the structure which is made is known.
However, in the easily openable packaging bag of this configuration, the process of forming the opening means such as the score line and the process of forming the cut at the edge of the opening means such as the score line are separate processes. If there is a discrepancy between the position of the opening means such as the score line and the incision position, and if there is a discrepancy between the position of the opening means such as the score line and the position of the incision, tearing will start from the location of the incision. However, there is a drawback that it is difficult to tear and open the laminate along the opening means such as a score line.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide an easy-open packaging bag that can be easily opened by tearing along a score line after starting to tear.
[0004]
[Means for Solving the Problems]
A packaging bag comprising a laminated body having a laser absorbing layer and a heat-adhesive resin layer and formed by a side edge heat-bonding portion and an edge heat-bonding portion . An opening cut line connecting the inner ends is formed , the end of the cut line is a bifurcated cut that opens outward, and an incision is formed at the edge that starts opening at least one of the heat-bonding portions. The edge of the bifurcated cut is formed so as to be located on the inner side of the inner end of the thermal bonding portion where the cut is formed, and the cut is formed so as to fall within the forked width of the bifurcated cut. By adopting a configuration, even if a gap occurs between the cut line and the position of the cut, if the gap is within the forked width of the bifurcated cut, the thermal bonding part is torn from the cut and the tear is Since it can be torn along the cut line from the intersection with the bifurcated cut, 4 The sealed bag or edge sealed bag or cut to open along one side, or the corner portion can be opened by cutting obliquely.
[0005]
A packaging bag made of a laminate having a laser absorption layer and a heat-adhesive resin layer and formed by a palm heat-bonding portion and an edge heat-bonding portion, and intersecting the laser-bonding heat-bonding portion with the laser absorption layer of the laminate A cut line for opening is formed, and the end of the cut line is a bifurcated cut that opens outward, and a notch is formed at the edge that starts the opening of the joint heat-bonding part . By forming the end edge so as to be located inside the inner end of the thermal bonding portion where the cut is formed, and the cut is formed so as to fall within the forked width of the bifurcated cut. Even if a gap occurs between the cut line and the position of the cut, if the gap is within the forked width of the bifurcated cut, the joint heat-bonding part is torn from the cut, and the split is a bifurcated cut. It can be torn along the cut line from the intersecting part. Therefore, the pillow type bag can be opened in the direction intersecting with the palm-split heat-bonding portion by starting the tearing from the cut portion of the palm-split heat-bonding portion.
[0006]
In the easy-open packaging bag, the thermal bonding portion has a bifurcated shape by adopting a configuration in which the edge of the bifurcated cut is formed on the inner side of the inner end of the thermal bonding portion where the cut is formed. Since no cut is formed, the laser absorption layer of the laminate is laminated adjacent to the heat-adhesive resin layer, and the cut is formed in the laser absorption layer, so that the cut portion becomes a concave groove and communicates with the outside. Even if it is the structure of the laminated body which tends to come out, the gas barrier property of a packaging bag does not fall. The invention according to claim 3 is the easy-open packaging bag according to claim 2, wherein the opening score line is formed obliquely on the edge heat-bonding portion side with respect to the direction of the palm heat-bonding portion. It is characterized by being. Invention of Claim 4 is a packaging bag which consists of a laminated body which has a laser absorption layer and a heat-adhesive resin layer, and was formed of the side edge heat-bonding part and the edge heat-bonding part, Comprising: One side-end heat A straight cut line is formed between the inner end of the bonded portion and the inner end of the one edge thermal bonded portion, which is formed as a bifurcated cut with both ends or one end extending outward. The easy opening is characterized in that it comprises a structure in which a notch is formed in the edge of the side edge heat-bonding portion and / or the edge of the edge heat-bonding portion so as to fall within the forked width of the bifurcated cut. It is a sex packaging bag.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing a first embodiment of the present invention, FIG. 2 is a plan view showing a second embodiment of the present invention, FIG. 3 is a plan view showing the third embodiment of the present invention, and FIG. FIG. 5 is a partial plan view showing another shape of the end portion of the score line, FIG. 6 is a sectional view showing the configuration of the laminate, and FIG. 7 is another configuration of the laminate. FIG. 8 is a cross-sectional view showing still another structure of the laminated body, wherein 2 is a side end thermal bonding portion, 3 and 7 are edge thermal bonding portions, 6 is a joint thermal bonding portion, and 4 is a cutting portion. 5 is a cut line, 5a is a bifurcated cut, d is a bifurcated width, 11 is a plastic layer, 12, 14, 16 is an adhesive layer, 13 is an aluminum foil layer, 15 is a laser absorption layer, and 17 is a thermal bond Each represents a functional resin layer.
[0008]
The first embodiment of the present invention is as shown in FIG. 1 and is composed of a laminated body having a laser absorption layer and a heat-adhesive resin layer, and is bonded by opposing side end heat bonding portions 2 and edge heat bonding portions 3. A bifurcated cut 5a extending in the direction perpendicular to the direction of the side end thermal bonding portion 2 between the inner ends of the side end thermal bonding portions 2 on both sides, and having both ends extending outward. The straight cut line 5 is formed, and the cuts 4 penetrating the laminated body are formed at the edge of the side end thermal bonding portion 2 so as to fall within the bifurcated spread width d of the bifurcated cut 5a. It is a configuration.
[0009]
The second embodiment of the present invention is as shown in FIG. 2 and is composed of a laminate having a laser absorption layer and a heat-adhesive resin layer, and is bonded by opposing side edge heat-bonding portions 2 and edge heat-bonding portions 3. A bifurcated cut 5a extending in the direction perpendicular to the direction of the side end thermal bonding portion 2 between the outer ends of the side end thermal bonding portions 2 on both sides, and having both ends extending outward. The straight cut line 5 is formed, and the cuts 4 penetrating the laminated body are formed at the edge of the side end thermal bonding portion 2 so as to fall within the bifurcated spread width d of the bifurcated cut 5a. It is a configuration.
[0010]
The third embodiment of the present invention is as shown in FIG. 3 and is composed of a laminated body having a laser absorption layer and a heat-adhesive resin layer, and is bonded by opposing side-end heat-bonding portions 2 and edge heat-bonding portions 3. A four-sided sealing bag that extends in an oblique direction between the inner end of one side end thermal bonding portion 2 and the inner end of one end thermal bonding portion 3 and has both ends extending outward A straight cut line 5 formed as a cut 5a is formed, and an edge of the side edge heat-bonding portion 2 and an edge of the edge heat-bonding portion 3 so as to fall within the bifurcated spread width d of the forked cut 5a. In this configuration, a cut 4 that penetrates the laminate is formed. In the case of 3rd Embodiment, since the corner | angular part of a packaging bag can be cut off diagonally and opened, it becomes a bag suitable for packaging of the contents with fluidity | liquidity.
[0011]
The fourth embodiment of the present invention is as shown in FIG. 4 and is composed of a laminate having a laser absorption layer and a heat-adhesive resin layer, and is bonded by a palm heat-bonding portion 6 and upper and lower edge heat-bonding portions 7. This is a pillow-type bag, which has a straight cut line 5 extending in a direction perpendicular to the direction of the palm-to-join thermal bonding portion 6 and having a bifurcated cut 5a at the end, and the forked width of the bifurcated cut 5a It is the structure by which the notch 4 which penetrates a laminated body was formed in the edge of the palm heat-bonding part 6 so that it might enter in d. In the case of the fourth embodiment, the cut line 5 may be formed over the entire circumference in a direction perpendicular to the direction of the palm thermal adhesive portion 6 of the bag, or the score line 5 is formed only on one side where the palm thermal adhesive portion 6 is located. You may make it do. In addition, the score line 5 may be formed obliquely on the upper edge thermal bonding portion 7 side with respect to the direction of the joint thermal bonding portion 6.
[0012]
In the first to third embodiments, if the position where the notch 4 is formed is within the forked width d of the bifurcated cut 5a, a slight deviation occurs in the position where the notch 4 is formed. However, when the laminate is torn from the location of the notch 4 in the direction perpendicular to the direction of the side edge thermal bonding portion 2 or the palm thermal bonding portion 6, when the tear reaches the bifurcated cut 5 a, along the bifurcated cut 5 a. Since it can be torn along the straight cut line 5 along with the tearing, the packaging bag can be easily opened along the cut line 5.
[0013]
As the shape of the bifurcated cut 5a at the end of the cut line 5, in addition to the branched shape shown in FIGS. 1 to 4, a bifurcated shape spreading in a V shape toward the outside as shown in FIG. A bifurcated shape that spreads in a semicircular shape toward the outside as shown in FIG. The shape of the bifurcated cut 5a is arbitrary as long as the end edge is a bifurcated shape extending outward. The bifurcated spread width d of the bifurcated cut 5a is preferably about 5 to 10 mm. In FIG. 5, the end edge of the bifurcated cut 5a is positioned inside the inner end of the thermal bonding portion, but the end edge of the bifurcated cut 5a reaches the outer end of the thermal bonding portion as in the second embodiment. You may form as follows.
[0014]
In the first to third embodiments, the shape of the bag is a four-side sealed bag. In the fourth embodiment, the bag is a flat pillow type bag, but the shape of the bag is arbitrary, and the three-side sealed bag. In addition, a self-supporting bag, a gusset pillow type bag, or the like in which the bottom is folded inward in a V shape can be used.
[0015]
As a laminate used in the easy-open packaging bag of the present invention, a plastic layer 11, an adhesive layer 12, an aluminum foil layer 13, an adhesive layer 14, a laser absorbing layer 15, an adhesive layer 16, and a heat-adhesive resin layer are sequentially arranged from the outer surface. The configuration shown in FIG. 6 in which 17 is laminated, the configuration shown in FIG. 7 in which the laser absorption layer 15, the adhesive layer 12, the aluminum foil layer 13, the adhesive layer 14 and the heat-adhesive resin layer 17 are laminated in order from the outer surface, from the outer surface A structure shown in FIG. 8 in which a plastic layer 11, an adhesive layer 12, a laser absorption layer 15, an adhesive layer 16, and a thermoadhesive resin layer 17 are laminated in this order can be used. In the case of the laminated body shown in FIGS. 6 and 8, the cut line 5 is formed in the laser absorption layer 15 by irradiating the laser from the inner surface side, and in the case of the laminated body shown in FIG. it can. In the laminated body shown in FIG. 6, the laser absorption layer 15 is on the inner surface side of the aluminum foil layer 13, and the cut line 5 formed in the laser absorption layer 15 is not conspicuous from the outer surface, so that the design bag does not impair the design. Can do.
[0016]
In the case where the laser absorption layer 15 is formed adjacent to the heat-adhesive resin layer 17 as in the laminate having the configuration shown in FIGS. 6 and 8, when a cut is formed in the laser absorption layer 15. Since the portion in which the cut is formed becomes a concave groove along the cut, in the configuration formed so that the bifurcated cut 5a reaches the edge of the packaging bag as in the second embodiment, along the cut. Since the groove formed in a concave shape communicates with the outside and may deteriorate the gas barrier property of the packaging bag, the edge of the bifurcated cut 5a is formed so as to be located inside the inner end of the thermal bonding portion. It is preferable to do this.
[0017]
As the laser absorbing layer 15 constituting the laminate, biaxially stretched polyethylene terephthalate, biaxially stretched nylon, polycarbonate, etc. can be used, and these films absorb a carbon dioxide laser with a wavelength of 10.6 μm. By condensing and irradiating these film surfaces, the irradiated portion of the film can be removed by heat generation, melting, mist formation, heat generation, decomposition, ashing, or the like to form a score line. 6 and FIG. 8, a carbon dioxide gas laser with a wavelength of 10.6 μm is output from the inner surface side in the case of the laminated body shown in FIG. 7 and from the outer surface side in the case of the structure shown in FIG. Irradiation is performed under conditions of a pulse width of 100 μs and a scanning speed of 1000 to 2000 mm / second, whereby the score line 5 can be formed in the laser absorption layer 15.
[0018]
Biaxially stretched polyethylene terephthalate, biaxially stretched polypropylene, biaxially stretched nylon, etc. can be used as the plastic layer 11 constituting the laminate, and the heat-adhesive resin layer 17 is low density polyethylene, medium density polyethylene, high density polyethylene. In addition, linear low density polyethylene, ethylene-vinyl acetate copolymer, polypropylene, ethylene-propylene copolymer, and the like can be used. As the adhesive layers 12, 14, 16, urethane resin, low density polyethylene, and the like can be used. Since these films have the property of not absorbing the carbon dioxide laser so much, the cut line is not formed by the irradiation of the carbon dioxide laser.
[0019]
As the laminate shown in FIG. 6, biaxially oriented polyethylene terephthalate (PET) / extruded polyethylene (EC) / aluminum foil (AL) / EC / PET / EC / polyethylene (PE), biaxially oriented polypropylene (OPP) / EC / AL / EC / PET / EC / PE, PET / EC / AL / EC / 2 biaxially stretched nylon (ON ) / EC / PE, etc. The laminate shown in FIG. 7 is PET / dry lamination (DL). / AL / DL / PE, ON / DL / AL / DL / PE, etc. As the laminate shown in FIG. 8, OPP / DL / ON / EC / PE, PET / DL / ON / DL / polypropylene (PP ), OPP / DL / PET / DL / PE, PET / DL / PET / DL / PE, and the like. A score line is formed in the underlined laser absorption layer 15.
[0020]
【The invention's effect】
A packaging bag comprising a laminated body having a laser absorbing layer and a heat-adhesive resin layer and formed by a side edge thermal adhesive portion and an edge thermal adhesive portion, and between the two thermal adhesive portions on the laser absorbing layer of the laminate. A cut line for opening is formed, and the end of the cut line is a bifurcated cut that opens toward the outside, and a cut is formed at the edge at which opening of at least one of the heat-bonded portions is started. Even if a gap occurs between the cut line and the position of the notch, the deviation is within the bifurcated width of the bifurcated cut. If so, the thermal bonding part can be torn from the incision point, and the tear can be torn along the cut line from the part where the fork cut intersects, so the four-side seal bag or the three-side seal bag along one side To open or cut the corners diagonally It is possible to be opened Te.
[0021]
A packaging bag made of a laminate having a laser absorption layer and a heat-adhesive resin layer and formed by a palm heat-bonding portion and an edge heat-bonding portion, and intersecting the laser-bonding heat-bonding portion with the laser absorption layer of the laminate A cut line for opening is formed, and the end of the cut line is a bifurcated cut that opens toward the outside. Even if a gap occurs between the cut line and the position of the notch, the deviation is within the bifurcated width of the bifurcated cut. For example, it is possible to tear the jointed heat-bonding portion from the cut portion and tear along the cut line from the portion where the tear intersects the bifurcated cut. Therefore, the pillow type bag can be opened in the direction intersecting with the palm-split heat-bonding portion by starting the tearing from the cut portion of the palm-split heat-bonding portion.
[0022]
In the easy-open packaging bag, the thermal bonding portion has a bifurcated shape by adopting a configuration in which the edge of the bifurcated cut is formed on the inner side of the inner end of the thermal bonding portion where the cut is formed. Since no cut is formed, the laser absorption layer of the laminate is laminated adjacent to the heat-adhesive resin layer, and the cut is formed in the laser absorption layer, so that the cut portion becomes a concave groove and communicates with the outside. Even if it is the structure of the laminated body which tends to come out, the gas barrier property of a packaging bag does not fall.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of the present invention.
FIG. 2 is a plan view showing a second embodiment of the present invention.
FIG. 3 is a plan view showing a third embodiment of the present invention.
FIG. 4 is a plan view showing a fourth embodiment of the present invention.
FIG. 5 is a partial plan view showing another shape of the edge of the score line.
FIG. 6 is a cross-sectional view illustrating a configuration of a stacked body.
FIG. 7 is a cross-sectional view illustrating another structure of a stacked body.
FIG. 8 is a cross-sectional view showing still another structure of the laminate.
[Explanation of symbols]
2 Side edge thermal bonding part 11 Plastic layer 3, 7 Edge thermal bonding part 12, 14, 16 Adhesive layer 4 Cut 13 Aluminum foil layer 5 Cut line 15 Laser absorption layer
5a Bifurcated cut 17 Heat-adhesive resin layer 6 Jointed heat-bonding part d Fork spread width

Claims (4)

A packaging bag comprising a laminated body having a laser absorbing layer and a heat-adhesive resin layer and formed by a side edge heat-bonding portion and an edge heat-bonding portion, and two heat-bonding portions on the laser-absorbing layer of the layered body A cut line for opening is formed to connect between the inner ends, and the end of the cut line is a bifurcated cut that opens outward, and an incision is made at an edge that starts opening at least one of the heat-bonding portions. Formed so that the edge of the bifurcated cut is positioned inside the inner end of the heat-bonding portion where the cut is formed, and the cut is within the forked width of the bifurcated cut. An easy-open packaging bag, characterized in that it is configured to enter. A packaging bag made of a laminate having a laser absorption layer and a heat-adhesive resin layer and formed by a palm heat-bonding portion and an edge heat-bonding portion, and intersects the laser-bonding heat bonding portion with the laser absorption layer of the laminate A cut line for opening extending in the direction to be formed is formed, and an end of the cut line is a bifurcated cut that opens toward the outside, and a cut is formed at an edge that starts opening of the joint heat bonding part, An end edge of the bifurcated cut is formed so as to be located on an inner side of an inner end of the thermal bonding portion where the cut is formed, and the cut is within a bifurcated width of the bifurcated cut. An easily openable packaging bag comprising a formed structure. The easy-open packaging bag according to claim 2, wherein the opening score line is formed obliquely on the edge thermal bonding portion side with respect to the direction of the palm thermal bonding portion . A packaging bag comprising a laminated body having a laser absorption layer and a heat-adhesive resin layer, and formed by a side edge heat-bonding portion and an edge heat-bonding portion. A straight cut line is formed that extends in an oblique direction between the inner ends of the edge thermal bonding portion and has a bifurcated cut in which both ends or one end extends outward, and the bifurcated spread of the bifurcated cut An easily openable packaging bag comprising a structure in which an incision is formed in an edge of the side edge thermal bonding portion and / or an edge of the edge thermal bonding portion so as to fall within the width.

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