JP4074115B2 - Easy-open packaging - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, the thermal adhesive part is peeled off from the peeling start part formed at the peripheral edge and opened, and the opening can be formed by cutting off either the front or back laminated body constituting the bag along the cut line. The present invention relates to an easily openable package.
[0002]
[Prior art]
Conventionally, in a package whose peripheral edge is thermally bonded, as a package that can be opened with a certain width only on one side of the front or back layer, a composite film as described in Japanese Utility Model Publication No. 60-1102 In the package obtained by sealing, a uniaxially stretched film is included in the composite film structure, a part of the uniaxially stretched film is provided with a non-seal part in the stretching direction, and two unsealing start lines are provided in the non-seal part. There is known a package body in which an opening prevention seal portion is provided below a position of the non-seal portion in a seal portion orthogonal to the seal portion partially including the non-seal portion. However, although this package is easy to open, it has a drawback that it cannot cut out only one side of the front or back layer film layer in a large area to form a large opening. Moreover, since a composite film is a structure containing a uniaxially stretched film, it has the fault that a composite film becomes expensive and a package becomes a cost increase.
[0003]
[Problems to be solved by the invention]
The object of the present invention is to open the opening by removing the thermal adhesive part of the package from the peeling start part and opening it, and cutting off either the front or back laminated body constituting the package along the score line. It is to provide a package that can be formed.
[0004]
[Means for Solving the Problems]
A rectangular packaging body comprising a laminate including a base material layer and a heat-adhesive resin layer and provided with a heat-bonding part that can be peeled at the periphery, and the heat-bonding parts that can be peeled face each other. The thermoadhesive resin layers of the laminate that are formed at the edge and at least one edge perpendicular to the edge and facing at least one corner of the corner where the peelable heat-bonding portion intersects each other. A peel start portion that is not bonded is formed, and at least one score line is formed in a direction perpendicular to the heat bonded portion in either one of the front and back laminates constituting the package between the heat bonded portions facing each other, By adopting a structure in which a cut is formed in the laminate at the edge of the cut line at the peeling start part side, the thermal adhesive part is peeled off from the peeling start part, and when the peeling reaches the cut point, it corresponds to the cut Product of either front or back along the cut line Body is cut, it is possible to form a large opening at a position laminates were cut in the package, it can be taken out easily the contents from the opening. By forming a plurality of cut lines, it is possible to change the size of the opening by changing the position of the cut line depending on the amount of contents remaining inside the package. In particular, it is very convenient to take out the contents when the contents that are easy to adhere to the laminated body constituting the package are packaged, such as boiled rice cake.
[0005]
In the easy-open packaging body described above, the thermal adhesive part is peeled off from the peeling start part by making the cut formed in the laminate in which the score line is formed, and the peeling reaches the cut part. Then, a laminated body can be teared along a score line from a notch, and a package body can be opened easily.
[0006]
In the easy-open packaging body, the cut line is formed in the base layer of the laminate at a depth within the range of the thickness of the base layer, thereby forming the laminate along the cut line. Even when a two-layered laminate composed of a base material layer and a heat-adhesive resin layer is used, the cut line does not penetrate the base material layer, so the gas in the package is formed by forming the cut line. The barrier property is not impaired.
[0007]
In the easy-open packaging body described above, the laminate has a configuration having an intermediate layer, and the cut line is formed in a state of penetrating the intermediate layer, thereby forming the state of penetrating the intermediate layer. The laminate can be easily cut and opened along the cut line, and the base material layer can be a gas barrier layer to provide a package with excellent gas barrier properties.
[0008]
In the easy-open packaging body described above, the peeling start portion is provided at two corners on a diagonal line, whereby the thermal bonding portion can be easily peeled off from the peeling start portion. Can be opened.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a plan view showing a first embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along II in FIG. 1, FIG. 3 is an enlarged sectional view taken along II-II in FIG. 1, and FIG. FIG. 5 is a plan view showing a third embodiment of the present invention, FIG. 6 is an enlarged cross-sectional view taken along II of FIG. 5, and FIG. 7 is a plan view showing an unsealed state of the first embodiment. 2, 2 ', 3, 3' are thermal bonding parts, 4, 4 'are peeling start parts, 5, 5' are score lines, 6, 6 'are cut, 7 is an opening, 10, 10' is A laminate, 11 is a base material layer, 12 is an intermediate layer, and 13 is a heat-adhesive resin layer.
[0010]
The first embodiment of the present invention is as shown in FIGS. As shown in FIG. 1, the two-sided laminated body 10 can be peeled off by the heat bonding part 2 and the heat bonding part 2 'and the heat bonding part 3 and the heat bonding part 3' facing each other on the periphery. It is a heat-bonded rectangular package. A peeling start part 4 in which the two front and back laminates 10 are not thermally bonded is formed at the corners where the thermal bonding part 2 and the thermal bonding part 3 at the periphery intersect, and the two laminates of the front and back sides are formed in the peeling start part 4. 10 is in a separated state, and the laminate 10 on the surface side constituting the package is spaced at a predetermined interval between the thermal bonding portion 2 and the thermal bonding portion 2 ′ in the direction orthogonal to the thermal bonding portions 2 and 2 ′. Two cut lines 5 are formed, and cuts 6 are formed at the edges of the two cut lines 5 on the thermal bonding portion 2 side.
[0011]
The cross section in the direction perpendicular to the score line 5 in the thermal bonding part 2 of the first embodiment is as shown in FIG. Laminate 10 has a structure in which a base material layer 11, an intermediate layer 12, and a heat-adhesive resin layer 13 are laminated from the outer surface, and penetrates the intermediate layer 12 through the intermediate layer 12 of the laminate 10 on the surface side constituting the package. A cut line 5 is formed. The cross section in the direction orthogonal to the score line 5 where the cut 6 is formed in the thermal bonding part 2 of the first embodiment is as shown in FIG. A V-shaped cut 6 is formed in the laminate 10 on the surface side constituting the package, and the laminate 10 is cut away. A cut line 5 is formed in the laminate 10 by a cut that penetrates the intermediate layer 12 formed in the intermediate layer 12. The heat-adhesive resin layer 13 of the laminate 10 is formed of an easily peelable resin, and the adhesive strength of the heat-bonding portions 2, 2 ′ and the heat-bonding portions 3, 3 ′ is 100 to 800 g / 15 mm that can be peeled. ing.
[0012]
The planar shape of the second embodiment of the present invention is as shown in FIG. It is a rectangular package that is thermally bonded so as to be peelable by the bonding part 3 ′. The peeling start part 4 and the peeling start part 4 ′ are formed at two corners on the peripheral diagonal line, and the laminate 10 of the two front and back sides is not thermally bonded at the peeling start part 4 and the peeling start part 4 ′. In the state separated into two, the laminate 10 on the surface side constituting the package body is spaced at a predetermined interval between the heat bonding portion 2 and the heat bonding portion 2 ′ and 3 in the direction orthogonal to the heat bonding portions 2, 2 ′. Cut lines 5 are formed, and a cut 6 and a cut 6 'are formed in the thermal bonding part 2 and the thermal bonding part 2' at the edges of the three cut lines 5, respectively. The cross-sectional shape perpendicular to the cut line 5 and the cross-sectional shape perpendicular to the cut line 5 where the cuts 6 are formed are the same as those of the first embodiment in the thermal bonding portions 2, 2 ′ of the second embodiment. The score line 5 is formed so as to penetrate the intermediate layer 12 in the intermediate layer 12 of the laminate 10 on the surface side constituting the package.
[0013]
A third embodiment of the present invention is as shown in FIGS. The planar shape is as shown in FIG. 5 and is the same as that of the first embodiment except that the configuration of the cut line 5 ′ is different. The cross section in the direction perpendicular to the cut line 5 ′ in the heat bonding part 2 is as shown in FIG. 6, and the laminate 10 ′ has a two-layer structure in which the base material layer 11 and the heat adhesive resin layer 13 are laminated. The cut line 5 ′ is formed on the outer surface of the base material layer 11 of the laminate 10 ′ on the surface side constituting the package with a depth within the range of the thickness of the base material layer 11. In the third embodiment, the laminated body 10 ′ is composed of two layers of the base material layer 11 and the thermoadhesive resin layer 13, but the cut line 5 ′ is the thickness of the base material layer 11 on the outer surface of the base material layer 11. Since the depth is within this range, the gas barrier property of the laminated body 10 ′ is not lowered. The cut line 5 ′ is formed at a depth of ½ to 2/3 of the thickness of the base material layer 11.
[0014]
In order to open the easy-open packaging body according to the first embodiment, the heat-bonding part 2 and the heat-bonding part 3 that can be peeled are grasped by holding the laminated body 10 that is separated in the peeling start part 4. When the peeling reaches the position of the notch 6, the laminate 10 is torn along the score line 5 formed corresponding to the notch 6, and the laminate 10 constituting the surface side of the package is scored. 5, the opening 7 can be easily formed in the package as shown in FIG. 7 . Further, when the content is reduced, a larger opening can be formed by sequentially tearing the laminate 10 along the score line 5 from the lower notch 6, so that it is very easy to take out the content. In particular, it becomes convenient to take out the contents when the contents that are easy to adhere to the laminated body are packaged, such as the package of the boiled fish.
[0015]
In the case of the easy-open packaging body of the second embodiment, from any part of the peeling start part 4 or the peeling start part 4 'formed in two places, as in the case of the first embodiment, The heat bonding part 2 and the heat bonding part 3 or the heat bonding part 2 ′ and the heat bonding part 3 ′ are peeled off, and the surface side of the package body is formed along the score line 5 from the notch 6 or the notch 6 ′. The laminate 10 can be cut out and opened. In the second embodiment, since three cut lines 5 are formed, the heat bonding part 2 and the heat bonding part 3 or the heat bonding part 2 'and the heat bonding part 3 from the position of the peeling start part 4 or the peeling start part 4'. An opening having a required size can be formed by peeling 'and peeling the laminate 10 sequentially along the cut line 5 at the position of the cut 6 or the cut 6'.
[0016]
In the first to third embodiments, the shape of the package is a four-side seal bag, but the three-side seal bag may be a self-supporting bag formed by folding the bottom portion inward, and the opposing heat-bonding portions are provided. The shape is arbitrary as long as it has a bag. The number of cut lines to be formed and the interval to be formed can be arbitrarily set so that an opening from which the contents can be easily taken out can be formed in consideration of the size of the bag. What is necessary is just to set arbitrarily so that opening may become easy also about the position and number to form a peeling start part, and a peeling layer may be formed in the heat adhesive resin layer surface of a peeling start part. As the release layer, an acrylic resin, polyamide resin, or the like to which a release agent such as fatty acid amide, silicon, or phosphoric acid ester is added can be used. In addition, regarding the cut formed on the edge of the score line, it may be formed only on the surface side laminate constituting the package body in which the score line is formed as in the embodiment, or on the laminate on both the front and back sides. It may be formed. When forming a score line only in the laminate on the front surface side that constitutes the package, the laminate on both the front and back surfaces is not cut from the cut portion, and only the laminate on the front side is torn, so the opening is opened. Can be formed. The incision is V-shaped but may be U-shaped or I-shaped. As the structure of the score line, when the laminate is composed of two layers of a base material layer and a 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. Is formed to penetrate through the intermediate layer when it consists of three layers of a base material layer, an intermediate layer, and a heat-adhesive resin layer.
[0017]
As a method for forming a score line, when a score line is formed in an intermediate layer of a laminate, a pattern is printed on a film as a base material layer, and a printed film as a base material layer and a film as an intermediate layer are dried. When laminating or laminating by extrusion lamination, continuous in the flow direction of the film serving as the intermediate layer using a cutting blade or the like at a predetermined position corresponding to the pattern printed on the film serving as the base material layer in the film serving as the intermediate layer This is performed by a method of providing a straight cut. Moreover, 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, after producing a laminate, such as a diamond needle for forming a score line from the reference surface Using a score line-forming tool whose tip protrudes by a predetermined dimension, the outer surface of the base material layer at a predetermined position corresponding to the pattern printed on the base material layer is brought into contact with and pressed with a constant load. By running the body, a linear score line is formed which is continuous in the flow direction of the film to be the base material layer.
[0018]
As the base material layer of the laminate, metal oxide-deposited biaxially stretched polyethylene terephthalate (VMPET), metal oxide-deposited biaxially stretched nylon (VMON), gas barrier biaxially stretched polypropylene (gas barrier OPP), gas barrier property Biaxially stretched nylon (gas barrier ON) or the like can be used. As the intermediate layer, biaxially stretched polyethylene terephthalate (PET), biaxially stretched nylon (ON), biaxially stretched polypropylene (OPP), or the like can be used. As the heat-adhesive resin layer, an easily peelable resin (EP) made of a 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) or the like can be used. By forming the heat-adhesive resin layer of the laminate with the above-described easily peelable resin, it is possible to set the adhesive strength of the heat-bonded part to 100 to 800 g / 15 mm, and peel the heat-bonded part from the peeling start part. The package can be opened.
[0019]
Laminating the base material layer, the intermediate layer, and the heat-adhesive resin layer can be performed by dry lamination (DL) using urethane adhesive or extrusion lamination (EC) using polyethylene or the like. It is preferable to use a configuration in which layers are laminated, since the tearability of the laminate is improved. As a structure of a laminated body, in the case of a three-layer structure, for example, VMPET12 (printing) / DL / PET12 / DL / EP30-50, VMPET12 (printing) / DL / ON15 / DL / EP30-50, VMPET12 (printing) / DL / ON15 / PE15-25 / EP30-50, barrier ON15 (printing) / DL / PET15 / DL / EP30-50, barrier OPP20 (printing) / DL / PET15 / DL / EP30-50 etc., 2 layers In the case of a structure, it is barrier OPP20 (printing) / DL / EP30-50, barrier OPP20 (printing) / PE15-25 / EP30-50, PET12 (printing) / DL / EVOH coextrusion EP30-50, etc.
[0020]
【The invention's effect】
A rectangular packaging body comprising a laminate including a base material layer and a heat-adhesive resin layer and provided with a heat-bonding part that can be peeled at the periphery, and the heat-bonding parts that can be peeled face each other. The thermoadhesive resin layers of the laminate that are formed at the edge and at least one edge perpendicular to the edge and facing at least one corner of the corner where the peelable heat-bonding portion intersects each other. A peel start portion that is not bonded is formed, and at least one score line is formed in a direction perpendicular to the heat bonded portion in either one of the front and back laminates constituting the package between the heat bonded portions facing each other, By adopting a structure in which a cut is formed in the laminate at the edge on the peeling start part side of the cut line, when the thermal bonding part is peeled off from the peeling start part and reaches the incision point, it corresponds to the cut. The laminate is cut along the cut line that is formed, and then wrapped. It is possible to form a large opening, it is possible to easily removed the contents from the opening. By forming a plurality of cut lines, it is possible to change the size of the opening by changing the position of the cut line depending on the amount of contents remaining inside the package. In particular, it is very convenient to take out the contents when the contents that are easy to adhere to the laminated body constituting the package are packaged, such as boiled rice cake.
[0021]
In the above easy-open packaging body, the cut line is formed in the base material layer of the laminate to a depth within the range of the thickness of the base material layer, or the laminate is provided with an intermediate layer and the intermediate layer By making the structure in which a score line is formed in a state of penetrating through the laminate, the laminate is torn and the film having excellent gas barrier properties is used as the base material layer, thereby improving the gas barrier property of the package. be able to. Moreover, since it is not necessary to use the laminated body of a structure containing a uniaxially stretched film, it becomes possible to aim at cost reduction.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line II in FIG.
3 is an enlarged sectional view taken along line II-II in FIG.
FIG. 4 is a plan view showing a second embodiment of the present invention.
FIG. 5 is a plan view showing a third embodiment of the present invention.
6 is an enlarged sectional view taken along the line II in FIG.
FIG. 7 is a plan view showing an opened state of the first embodiment.
[Explanation of symbols]
2, 2 ', 3, 3' Thermal bonding part 4, 4 'Peeling start part 5, 5' Cut line 6, 6 'Notch 7 Opening
10, 10 'laminate
11 Base material layer
12 Middle layer
13 Thermal adhesive resin layer

Claims (5)

A rectangular packaging body comprising a laminate including a base material layer and a heat-adhesive resin layer and provided with a heat-bondable portion that can be peeled at the periphery, wherein the peelable heat-bonded portion is a pair of opposing surfaces And a heat-adhesive resin layer of a laminate that is formed on at least one end edge perpendicular to the end edge and that faces at least one corner of the peelable heat-bonding portion A peeling start portion that is not bonded to each other is formed, and at least one score line is formed in a direction perpendicular to the thermal bonding portion in either of the front and back laminated bodies constituting the packaging body between the thermal bonding portions facing each other. An easily openable packaging body, which is formed and has a configuration in which a cut is formed in the laminate at an end edge of the cut line on the peeling start portion side .   The easy-open packaging body according to claim 1, wherein the cut is formed in a laminated body in which the score line is formed.   The easy-open packaging body according to claim 1 or 2, wherein the score line is formed in the base material layer of the laminate to a depth within the thickness range of the base material layer.   The easy-open packaging body according to claim 1 or 2, wherein the laminate has a configuration having an intermediate layer, and the cut line is formed in a state of penetrating the intermediate layer. The easy-open packaging body according to any one of claims 1 to 4, wherein the peeling start part is provided at two corners on a diagonal line.

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