JP6501573B2 - Bag body - Google Patents

Description

  The present invention relates to a bag containing a content, and more particularly to a bag capable of containing the content with high sealing ability until immediately before use, and capable of easily exposing an opening or a vent in use.

  Conventionally, the bag part holding the contents is sealed before use by using the peelable outer layer, but the bag which provides the function of discharging the contents at the time of use is known.

  For example, Patent Document 1 shows a standing pouch having a body comprising an outer layer which can be peeled, a peeling layer, and an inner layer, and an unsealed tab portion which triggers peeling of the outer layer which protrudes from the rim edge of the pouch The standing pouch is described.

  In the vicinity of the edge of the unsealed tab portion of this standing pouch, an outer layer peeling half cut line is engraved at a depth which generally penetrates the inner layer from the inside of the pouch. In addition, an annular half cut line is formed in the other portion of the inner layer at a depth that substantially penetrates the inner layer. Therefore, volatilization is the content from the opening formed by removing the inner layer along the annular half cut line by pinching the unsealed tab portion and peeling the outer layer from the vicinity of the outer layer peeling half cut line. The substance can be volatilized.

JP, 2009-029469, A

  However, in the standing pouch described in Patent Document 1, the unsealed tab portion for peeling the peelable outer layer protrudes from the peripheral edge of the pouch, so that the unsealed tab portion contacts with another pouch during transportation. There is a possibility that the non-sealed tab portion may be broken or the outer layer may be peeled off from the non-sealed tab portion to be opened.

  Therefore, the present invention has an object to provide a bag which is less likely to cut off the tab during transportation, to peel off the outer layer and to be opened, and to easily expose the opening or the vent in use. I assume.

In order to solve the above problems, the present invention adopts the following solution:
[1] A bag body (1, 1 ') which is a laminated film formed of one or more films, and at least one of the films is an inner layer and a peelable outer layer,
A peripheral seal (2) which seals a part or all of the peripheral part of the film to form a bag (3) containing the contents;
An inner circumferential seal portion (11) which seals a part of the inner side of the peripheral portion of the film and which seals the bag portion (3) integrally with the peripheral seal portion (2);
A tear guide (5) capable of tearing the bag (1, 1 ') by removing at least a part of the peripheral seal (2) while sealing the bag (3); And a peeling trigger portion (4) as a peeling trigger of the peelable outer layer;
Equipped with
When the bag body (1, 1 ') is cut from the tear guide portion (5), a new side of the peel trigger portion (4) is formed, and the peel trigger portion (4) becomes easy to pinch, and A bag (1, 1 ') in which the opening or vent (13) of the inner layer is exposed when the peelable outer layer is peeled off.
[2] In the film according to [1], the portion of the film facing the peeling trigger portion (4) is at least partially removed, and the inner surface of the peeling trigger portion is at least partially exposed. The bag body described.
[3] The boundary layer between the peeling trigger portion (4) of the outer layer and the remaining portion of the outer layer further includes an inner layer half cut (12) for peeling trigger substantially penetrating the inner layer, [1] or [2] The bag body described in.
[4] An outer layer half cut (9a) engraved from the outer layer side of the laminated film is provided, whereby the laminated film is constituted when the outer layer is peeled by pinching the peeling trigger portion (4). The bag body of any one of [1] to [3], in which only a part of the outer layer is peeled off.
[5] The outer layer is easily cut, whereby when the peeling trigger portion is pinched to peel the outer layer, the outer layer is cut and only a part of the outer layer is peeled. The bag body of any one of 1]-[3].
[6] The bag body according to [5], wherein the outer layer has a linear cut property.
[7] The bag according to any one of [1] to [6], wherein the contents are a fragrance, a deodorizing agent, an adsorbent, or a volatile drug.
[8] The bag according to any one of [1] to [7], wherein the opening or the vent of the inner layer is formed by punching.
[9] The bag according to any one of [1] to [7], wherein an opening inner layer half cut substantially passing through the inner layer is formed at a location corresponding to the opening of the inner layer or the contour of the vent. body.
[10] The bag body according to [8] or [9], wherein the opening or the vent can discharge at least a part of the content.
[11] The bag according to any one of [1] to [10], wherein the inner layer includes a sealant layer as an innermost layer.
[12] The peripheral seal portion (2) is an upper seal portion sealing at least a portion of the upper portion of the bag body (1), and a side portion sealing at least a portion of the side portion of the bag body The bag according to any one of [1] to [11], which has a seal and / or a bottom seal that seals at least a part of the bottom of the bag.
[13] The bag according to any one of [1] to [12], which is formed by any of the following methods (I) to (V):
Method (I) in which the laminated film is folded so that the inner layers face each other and the folding portion is in an M shape, and the upper and both sides of the folded film are sealed by the peripheral sealing portion;
A method of folding the laminated film so that the inner layers face each other and the folding portion on one side, and sealing the other side, top and bottom of the folded film with the peripheral seal portion (II );
The laminated film is folded so that the inner layers face each other and the folds are on one side, and a double-folded bottom member is placed in the bottom of the folded film, and the bottom of the folded film Method (III) of sealing the peripheral member with at least a portion of the bottom member with the peripheral seal, and sealing the other side and the top of the folded film with the peripheral seal;
Method (IV) of laminating the laminated film and another film and sealing the top, both sides and the bottom with the peripheral seal (IV); or a two-folded bottom member sandwiched by the laminated film and the other film Method (V) of sealing the part and the bottom part with the peripheral seal part.
[14] The bag according to [13], wherein the bag is formed by the method (I), (III) or (V), and the bottom of the bag is bottom-shaped.
[15] The bag according to [14], which is self-supporting.

  According to the bag body of the present invention, a new side of the peeling trigger portion is formed by tearing the bag body, and the peeling trigger portion becomes easy to pinch, so the peeling trigger portion is the peripheral portion of the bag body before tearing. There is no need to project from the outside to the outside, or such need is small, and therefore damage to the peeling trigger during transportation of the bag, peeling from the bag, etc. can be suppressed.

FIG. 1 is a perspective view of a bag according to a first embodiment of the present invention. FIG. 2 is a front view of the bag of FIG. FIG. 3 is a perspective view of a bag according to an embodiment of the present invention in which the cutout guide portion is changed from the aspect of FIG. FIG. 4 is a front view of the bag of FIG. 3; FIG. 5 is a state diagram showing the use of the bag by the cross section of the bag at line A-A 'in FIG. FIG. 6 is a state diagram showing the use of the bag by the cross section of the bag at line B-B 'in FIG. FIG. 7 is a front view of a bag according to a second embodiment of the present invention. FIG. 8 is a state diagram showing the use of the bag by the cross section of the bag taken along line A-A 'in FIG. FIG. 9 is a perspective view of a bag according to a third embodiment of the present invention. FIG. 10 is a front view of the bag of FIG. FIG. 11 is a state diagram showing how to use the bag by the cross section of the bag taken along line A-A 'in FIG. FIG. 12 is a perspective view of a bag according to a fourth embodiment of the present invention.

<Bag body>
The bag of the present invention is formed of one or more films, and at least one of the films is a laminated film including an inner layer and a peelable outer layer.

  The bag body of the present invention is a peripheral seal portion which seals a part or all of the peripheral portion of the film to form a bag portion; a bag in which at least a part of the peripheral seal portion is removed to seal the bag portion. A tear guide portion capable of tearing the body; and a peeling trigger portion which causes peeling of the peelable outer layer.

  Hereinafter, the bag of the present invention will be described with reference to the drawings. Here, FIGS. 1 to 6 show a first embodiment of the bag body of the present invention in which the peripheral seal portion is formed only on a part of the peripheral portion of the film, and FIGS. Fig. 6 shows a second embodiment of the bag according to the invention, in which the peripheral seal is formed on the entire peripheral part of the film. And FIGS. 9-11 show the 3rd Embodiment of this invention from which the part which opposes a peeling trigger part is removed at least partially. Furthermore, FIG. 12 shows a fourth embodiment of the present invention in which the outer layer has easy and / or straight cut properties.

  Specifically, although FIGS. 1 and 3 both have the peripheral seal formed on only a part of the peripheral part of the film, one of the bags of the present invention has a difference in the position of the notch guide. It is a perspective view of an embodiment. 2 and 4 are front views of the bag of FIGS. 1 and 3, respectively, and FIGS. 5 and 6 are cross sections of the bag taken along line A-A 'and B-B' of FIG. 2, respectively. It is a state diagram showing how to use a bag. However, it can be said that FIG. 5 also substantially shows the cross section of the bag at line A-A 'in FIG.

  5 (a) and 6 (a), 5 (b) and 6 (b), 5 (c) and 6 (c), and 5 (d) and 6 (d). Fig. 6 shows a partial cross-sectional view of the bag 1 at the same timing until the opening or vent of the bag internal layer is exposed. As described above, FIGS. 5 (a) to 5 (d) also show the transition of the AA 'cross section of the bag body of FIG. 4, but in the embodiment of FIG. 2 and the embodiment of FIG. It should be noted that the schedule line is different. That is, in the case of the embodiment of the bag shown in FIG. 2, the planned tear line in FIG. 5A does not change its position even if the A-A ′ cross section is moved laterally. However, in the case of the embodiment of the bag of FIG. 4, the position of the planned tear line in FIG. 5 (a) changes depending on the location of the A-A 'cross section. Moreover, the transition of the BB 'cross section of the bag of FIG. 4 has no tear line in FIG. 6 (a), the bag is not cut apart in FIGS. 6 (b) to 6 (d), and the bag is It can be understood from FIG. 6 in consideration of the case where the portion is large and the upper seal portion of the peripheral seal portion is small.

  7 is a front view of another embodiment of the bag of the present invention in which a peripheral seal is formed on the entire peripheral part of the film, and FIG. 8 is a line A of FIG. It is a phase diagram which shows usage of a bag by the cross section of the bag in -A '.

  Further, FIG. 9 is a perspective view of a third embodiment of the bag of the present invention, FIG. 10 is a front view of the bag of FIG. 9, and FIG. 11 is a line A-A of FIG. FIG. 6 is a state diagram showing how to use the bag by the cross section of the bag in FIG.

  In addition, FIG. 12 is a perspective view of a fourth embodiment of the bag according to the invention. Fig.12 (a) shows the state before tearing off a peripheral seal part along a tear line, FIG.12 (b) shows the state after tearing along a tear line according to a tear line. 12 (c) shows the state after peeling the outer layer. The shaded portion in FIG. 12B indicates the portion to be peeled.

  Since the bag portion of the bag body of the present invention is sealed at the time of transportation, the atmosphere of the contents can be kept stable. On the other hand, the bag may be cut away from the tear guide portion to form a new side in the peeling trigger portion, and the opening or the ventilation portion of the inner layer may be exposed by gripping the one side and peeling the outer layer. it can.

  The peeling trigger portion does not protrude outward from the peripheral portion of the bag, so that it is difficult to be damaged during transportation of the bag, while the bag is cut and separated from the guiding portion to form a new side of the peeling trigger portion By doing this, it is possible to make the peeling trigger part easy to grip. Therefore, the bag body of the present invention is compatible with the durability of the peeling trigger portion and the ease of picking.

  In addition, when the outer layer of the bag of the present invention is peeled off, the opening or the vent of the inner layer is exposed. That is, while the contents are sealed in the bag until the peeling trigger portion is pinched and the outer layer is peeled, if the outer layer is peeled to expose the opening or the vent of the inner layer, the opening or the vent of the inner layer The contents can be vented or taken out with the ambient air.

  In the first embodiment of the bag body of the present invention shown in FIGS. 1 to 6, the bag portion 3 before opening is sealed by the peripheral seal portion 2 and the inner peripheral seal portion 11, and the peeling trigger portion of the bag body 1 4 is in a difficult-to-hold state by being surrounded by the peripheral seal portion 2 and the inner peripheral seal portion 11 (FIGS. 1 to 4, 5 (a), 6 (a)).

  On the other hand, when the peripheral seal portion 2 is cut off from the cutting guide portion 5, the upper seal portion of the peripheral seal portion 2 is cut out along the planned cutting line, so the peeling trigger portion 4 is divided into two and new Side is formed. As a result, one side of the separated peeling trigger portion 4 is pinched and fixed, and the other is pinched and peeled (FIG. 5 (b)).

  Thereafter, when the peeling trigger portion 4 is pinched and the outer layer 9 is peeled (FIGS. 5C and 6C), the portion of the inner layer 8 surrounded by the opening inner layer half cut 13 adheres to the outer layer 9 In this state, the openings 6 are formed in the inner layer 8 (FIGS. 6 (c) and (d)).

  In the first embodiment of the bag according to the present invention, as shown in FIGS. 1 and 3, since the bottom of the bag 1 is a bottom, the bag 1 can stand on its own, and Can accommodate relatively large contents. In another arrangement, the bag may be placed horizontally with the opening or vent facing up.

[the film]
As described above, since the bag of the present invention is formed of a film, this film will be described below. The film may be liquid impermeable and / or gas impermeable. In addition, at least a part of the inner layer exposed at the time of outer layer peeling may be breathable. The film may be a thermoplastic resin film, which may be part of a laminate including a metal foil or the like.

  At least one of the films forming the bag of the present invention is a laminated film comprising an inner layer and a peelable outer layer.

  When a bag is formed only by the laminated film including the inner layer and the peelable outer layer, the laminated film can be folded to form a body member of the bag.

  On the other hand, when forming a bag with a plurality of films, the laminated film including the inner layer and the peelable outer layer and the other film may be faced to be sealed to form a body member of the bag.

  For example, the bag body 1 of the first embodiment of the present invention shown in FIGS. 1 and 3 is formed of a pair of films. In that case, as shown in FIGS. 5 and 6, one film is the laminated film 7 including the inner layer 8 and the peelable outer layer 9, but the other film 10 is not particularly limited, and is the same as the film 7. Or may be different.

  Here, when the film 10 is a film other than the laminated film 7 including the inner layer 8 and the peelable outer layer 9, a flexible film used for various filled bags may be used as the film 10, For example, a single layer or multilayer film mainly made of plastic, waterproofed paper or cloth may be used.

  Since the laminated film 7 includes the inner layer 8 and the peelable outer layer 9, the inner layer and the peelable outer layer will be described below.

[Inner layer]
The inner layer is a layer that faces the inner side or the contents side of the bag when the bag is formed. The inner layer may contain a commercially available resin film, an extruded resin film or the like as a substrate layer in order to impart liquid impermeability and / or gas impermeability to the laminated film.

  As a base material layer, for example, polyethylene terephthalate film (PET), low density polyethylene film (LDPE), medium density polyethylene film (MDPE), high density polyethylene film (HDPE), linear low density polyethylene film (LLDPE), polypropylene Films (PP), nylon films (Ny), etc. may be used alone or in combination.

  Also, the inner layer preferably includes a sealant layer as the innermost layer. The sealant layer is a layer for sealing one or more films.

  The material of the sealant layer is selected according to the material to be sealed, and for example, LDPE, LLDPE, PP, ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid copolymer (EAA), ionomer resin, ethylene-vinyl acetate It may be a resin such as a copolymer. These resins may be in the form of, for example, a stretched or non-stretched film, a molten resin for extrusion lamination, and a paint for hot melt.

  Specifically, the sealant layer can be formed of “Suzuron L” manufactured by Icero Chemical Co., Ltd., or an easy open film.

  Furthermore, the inner layer may include other layers such as a resin layer other than the base material layer, an adhesive layer, a metal foil layer such as aluminum foil, and an inorganic substance vapor deposition film.

  In the bag body of the first embodiment of the present invention, as shown in FIG. 5A, the inner layer half cut 12 for outer layer peeling trigger is formed at the boundary between the outer layer peeling trigger part and the remaining part of the outer layer. Is formed at a depth substantially penetrating the

  The separation trigger inner layer half cut may be a solid line or a broken line (perforation), and may be a single line or a plurality of lines.

  For example, in the bag body 1 of the first embodiment of the present invention, as shown in FIGS. 1 to 5, the peeling trigger inner layer half cut 12 may be formed as a single line or a plurality of lines. In order to facilitate alignment of the inner half cut 12 and the inner circumferential seal portion 11, it is preferable to form a plurality of lines.

  In addition, by providing a plurality of rows of inner layers for peeling trigger, it is possible to reduce the possibility that the outer layer can not be peeled even if the accuracy of the inner layer half cutting is poor and some particles do not reach the peeling surface. Can.

  In the bag body 1 of the first embodiment of the present invention, as shown in FIG. 6, the opening inner layer half cut 13 is formed at a depth substantially penetrating the inner layer 8 at a location corresponding to the outline of the opening 6. It is done. That is, the opening inner layer half cut 13 can define the area of the opening 6.

  The opening inner layer half cut is preferably formed in an annular shape.

  In the inner layer, instead of the inner layer half cut for opening, an opening may be initially formed by punching. Even in that case, before peeling off the peelable outer layer, since the opening is covered with the outer layer, the liquid impermeability or gas impermeability of the laminated film is maintained.

  Instead of providing the opening or after providing the opening, the inner layer is partially made of a breathable material such as woven fabric or non-woven fabric or paper to allow the contents to be in contact with the air and / or transpiration. You may go from this breathable part.

[Removable outer layer]
The peelable outer layer is a layer that faces the outside of the bag when the bag is formed.

  In the bag body 1 of the first embodiment of the present invention, as shown in FIG. 5A, the peeling of the peelable outer layer 9 is suppressed by the peripheral seal portion 2. On the other hand, as shown in FIG. 5 (b), when the bag body is torn along the intended line of tearing and a part of the peripheral seal portion 2 is removed, a new side of the peeling trigger portion 4 is formed. As a result, since the peeling trigger portion 4 is easy to pinch, peeling of the outer layer 9 is possible.

  Furthermore, as shown in FIG. 5 (c), the peeling trigger portion 4 is pinched to peel the outer layer 9, and as shown in FIGS. 5 (d) and 6 (d), the outer layer 9 is removed from the bag. It can be peeled off.

  As shown in FIGS. 9 and 10, the outer layer can have an optional outer half cut 9a engraved from the outer layer side of the laminated film. When the peeling trigger portion 4 is pinched and the outer layer is peeled by the outer layer half cut, the outer layer is cut and only a part of the outer layer is peeled. Therefore, by having the outer layer half cut, the area of the outer layer to be peeled can be reduced, and the outer layer can be peeled more easily.

  As shown in FIGS. 9 and 10, it is preferable that the outer layer half cut has one end in contact with the extension line of the tear guide portion and the other end be the outer end of the peripheral seal portion 2.

  In addition, in the fourth embodiment of the present invention, the outer layer has a peeling portion that is peelable from the inner layer, and a main body portion. The area between the peeling portion and the main body portion is easily cuttable. A portion of the outer layer may not be peelable with the inner layer, but preferably is peelable with the inner layer in substantially all areas of the outer layer. Moreover, in a part of outer layer, it may not be easy to cut, but preferably substantially the entire area of the outer layer is easy to cut. Easy cutting property should just be easy cutting property in the direction which peels a peeling part.

  The outer layer may be a single layer or a multilayer, and in the case where the outer layer is a multilayer, at least one of the multilayers may not be easily cuttable. For example, even if at least one of the layers is not easy to cut, the other layers are easy to cut, and the easy to cut layer and the layer not easy to cut have adhesion. Layers that are not cut may also be able to form easily cut layers.

  Here, the easy-to-cut property refers to a property that allows an adult male to be torn by hand in at least one direction without causing great stress. For example, the easy-to-cut property is a tear strength of 20.0 N / mm or less, 15.0 N / mm or less, 10.0 N / mm or less, 8.0 N / mm or less in at least one direction. The case of 5.0 N / mm or less is said. Here, the tear strength is a sample size of 115 mm × 50 mm and a slit of 45 mm in the longitudinal direction, using a strograph VES1D manufactured by Toyo Seiki Seisakusho Co., Ltd., based on a trouser tear method according to JIS K7128-1. The test speed is 200 mm / min, the distance between grippers is 75 mm, the measurement distance is 150 mm, and the average value of three measurements is used.

  In addition, preferably, the peeling portion has linear cuttability. The linear cuttability of a film refers to the property of a film that can be easily teared in a straight line when it is attempted to tear due to the molecular orientation of the film and the like. For example, since a stretched film, in particular a uniaxially stretched film, has a linear cuttability, it is suitable to use at least as part of a laminate in the region of the peeling portion of the outer layer. In the case where the exfoliation portion has a linear cut property in the direction in which the exfoliation portion is exfoliated, the exfoliation portion can be cut cleanly, whereby the expected opening portion can be reliably exposed.

  In general, even if the film does not have easily cutability and / or straightness cutability, the film can be cut to provide easily cutability and / or straightness cutability. For example, by cutting with a laser into a structure in which a resin film sandwiches a metal foil layer, it is possible to insert a cut in only one resin film without damaging the metal foil layer. Moreover, it is also possible to insert a cut with a rotary cutter or the like only in part of the thickness of the resin film. Furthermore, the film may be provided with easy cutability by containing a filler or the like.

  Hereinafter, peeling of the outer layer in the case where the outer layer has easy-cut property and / or straight-line cut property will be described with reference to FIG.

  FIG. 12 (a) shows a bag according to the present invention in which the outer layer has easy and / or linear cuttability. In this case, the opening inner layer half cut 13 can be formed to be included in the peeled portion of the outer layer (the shaded portion in FIG. 12B).

  First, the peripheral seal portion 2 of the bag body 1 is cut away from the tear guide portion 5, and a portion of the peripheral seal portion 2 (e.g., the upper seal portion) is removed. And as shown in FIG.12 (b), a new side is formed in the peeling trigger part 4, and a peeling part can be removed by holding this one side and pulling it in the arrow direction. Thus, as shown in FIG. 12C, the opening 6 of the inner layer is exposed, and the contents can be opened.

  When the inner layer is liquid impermeable or gas impermeable, the outer layer may be liquid permeable or gas permeable in portions other than where it adheres to the openings and / or vents of the inner layer. However, in order to improve the liquid or gas impermeability of the bag, it is preferred that the outer layer also be liquid or gas impermeable. Thus, the outer layer may comprise the same layer as the substrate layer used for the inner layer.

  For example, paper, PET film, LDPE film, MDPE film, HDPE film, LLDPE film, PP film, nylon film, etc. may be used alone or in combination as the base material layer forming the outer layer. Moreover, it is preferable that the paper used as an outer layer is waterproofed.

  The outer layer may also contain a resin or paper layer other than the base material layer, an adhesive layer, a metal foil layer such as aluminum foil, or another layer such as an inorganic substance vapor deposition film. Furthermore, exfoliation of the outer layer is described in detail below.

[Peeling of outer layer]
In the film, exfoliation of the outer layer can be achieved by interfacial exfoliation or cohesive failure, without being bound by the mechanism of action.

  For example, the outer layer is peeled off from the interface between the outer layer and the peelable resin layer by arranging a layer formed of the peelable resin (hereinafter referred to as "a peelable resin layer") between the inner layer and the outer layer. The outer layer and the easily peelable resin layer can be peeled from the interface between the inner layer and the easily peelable resin layer.

  In the first embodiment of the present invention, when the outer layer and the easily peelable resin layer are peeled from the interface between the inner layer and the easily peelable resin layer using the easily peelable resin layer, not by cohesive peeling but by interfacial peeling. It is preferable because no peeling mark is left on the peeling surface and a clean peeling surface is obtained.

  In the second embodiment of the present invention, a layer formed of a release agent such as a release varnish (hereinafter referred to as a “release agent layer”) is disposed between the outer layer and the inner layer to form a release agent layer. The outer layer can be peeled off, or the outer layer and the release agent layer can be peeled off from the inner layer.

  In that case, if the peeling varnish layer of the dot pattern and the peeling varnish layer of the solid pattern are disposed on the surface of the inner layer and the adhesive layer is disposed between the inner layer and the outer layer, the peeling varnish is not printed on the inner layer In the part, the inner layer and the outer layer are adhered by the adhesive layer, and in the part where the peeling varnish is printed, the inner layer and the outer layer are pseudo-bonded. Therefore, it is preferable because the outer layer and the peeling varnish layer can be peeled from the inner layer triggered by the peeling varnish layer of the solid pattern on the surface of the inner layer.

  In general, the release agent can be disposed on the outer layer and / or the inner layer by printing.

  Alternatively, a layer formed of a weakly cohesive resin may be disposed between the outer layer and the inner layer, and stress may be applied to the resin to break it, thereby achieving separation of the outer layer and the inner layer.

(Easy release resin and release agent)
The easily peelable resin and the release agent are described below.

(Easy releasable resin)
The easily peelable resin secures the adhesion between the outer layer and the inner layer before the force is applied, but when the force is applied, the outer layer is peeled from the interface between the outer layer and the easily peelable resin layer or the inner layer and the easily peelable resin It is resin which can peel an outer layer and an easily peelable resin layer from the interface of a layer.

  As the easily peelable resin, for example, a resin in which a cyclic olefin copolymer (COC) is mixed with a polyolefin in a predetermined ratio is preferable.

  Examples of the polyolefin include polyethylene resin, polypropylene resin and the like, and LDPE is preferably used. As LDPE, for example, a trade name "PETROTHENE" manufactured by Tosoh Corp., a trade name "Suntec" manufactured by Asahi Kasei Chemicals Corp., etc. may be mentioned.

  The MFR (Melt Flow Rate) of the polyolefin may be about 0.01 g / 10 min or more, or about 1 g / 10 min or more at a temperature of 190 ° C., and the MFR is about 60 g / 10 min or less, Or about 50 g / 10 min or less.

The density of the polyolefin may be about 0.89 g / cm ³ or more, or about 0.90 g / cm ³ or more, and the density may be 0.94 g / cm ³ or less, or 0.93 g / cm ³ or less It may be.

  "Cyclic olefin copolymer (COC)" refers to a so-called Ziegler catalyst in a hydrocarbon solvent such as hexane, heptane, octane, cyclohexane, benzene, toluene, xylene, etc. And copolymers which can be obtained by preparing a catalyst such as a metallocene catalyst. As such a copolymer, for example, a trade name "APEL" manufactured by Mitsui Chemicals, Inc., etc. may be mentioned.

  The MFR of COC may be about 0.1 g / 10 min or more, or about 1 g / 10 min or more, when measured under the conditions of a temperature of 190 ° C. and a load of 2.16 kg according to JIS K 7210. The MFR may be about 40 g / 10 min or less, or about 30 g / 10 min or less.

  By changing the mixing ratio of LDPE and COC, the easily peelable resin can control the interfacial peel strength with the outer layer to be peeled or the inner layer and can be adjusted to a desired value.

  The content of COC in the easily peelable resin may be about 1% by mass or more, or about 2% by mass or more, and the content is about 24% by mass or less or about 20% by mass or less You may When the content of COC is about 1% by mass or more, the peel strength between the layer to be peeled and the peelable resin layer is optimized to facilitate interfacial peeling between the two, while about 24 It is preferable that the content is not more than% by mass, since control of the peel strength between the two becomes easy.

  The thickness of the easily releasable resin layer may be about 10 μm or more, or about 12 μm or more, in order to achieve both the adhesiveness and the releasability with the layer to be peeled, and this thickness is It may be about 30 μm or less, or about 25 μm or less.

(paint remover)
The release agent is a resin or an additive that inhibits adhesion between the inner layer and the outer layer. When the release agent is disposed between the inner layer and the outer layer, the inner layer and the outer layer are apparently bonded due to the pseudo-adhesiveness of the release agent, but they separate immediately when a force is applied.

  Therefore, in the bag 1 ′ of the second embodiment of the present invention, as shown in FIGS. 7 and 8, the inner layer and the outer layer are bonded around the solid portion 14 of the release agent and the corresponding peeling trigger portion 4 It is preferable to suppress peeling of the peeling trigger portion 4 until the bag 1 'is cut from the tear guide portion 5.

  As the release agent, for example, at least one selected from the group consisting of silicone resin, cellulose resin such as nitrocellulose resin, urethane resin, amino alkyd resin, polyamide resin and polyester resin; aqueous varnish; oil-based varnish UV-curable varnishes; and peeling varnishes. Among these, as a peeling varnish, the mixture of a silicone resin and a cellulose resin is preferable.

  More preferably, the release varnish is a mixture of at least one of the resins listed above and a wax. The content of wax in the mixture may be about 20% by weight or more, or about 30% by weight or more, and may be about 85% by weight or less, or about 80% by weight or less based on the weight of the mixture .

  It is preferable that the content of the wax is about 20% by mass or more, since it is possible to prevent picking of other layers adjacent to the peeling varnish layer, while the content of the wax is about 85% by mass or less. It is preferable because it can prevent delamination of the layer. Specifically, as the peeling varnish, "Polycoat P-91" manufactured by DIC Graphics, Inc. may be used.

<Component of bag body>
Hereinafter, the "peripheral seal portion", "inner circumferential seal portion", "bag portion", "peeling trigger portion", "tearing guide portion", "opening", "bottom member" and "content" which are constituent elements of the bag body Each item will be explained.

[Perimeter seal part]
The peripheral seal portion is a seal portion that seals a part or all of the peripheral portion of the film to form a bag portion.

  In the bag body 1 of the first embodiment of the present invention, as shown in FIG. 1 or FIG. 3, the peripheral seal portion 2 is formed only on a part of the peripheral portion of the film, and the peripheral seal portion 2 will be described below. The bag portion 3 is sealed by the inner circumferential seal portion 11. Further, in the bag 1 ′ of the second embodiment of the present invention, as shown in FIG. 7, the peripheral seal portion 2 is formed on the entire peripheral portion of the liquid impermeable film, and the inner peripheral seal portion 11 and The bag portion 3 is sealed by the peripheral seal portion 2.

  Examples of the method for forming the peripheral seal portion 2 include a thermal melting method, an adhesive method, a mechanical bonding method and the like. Among them, the thermal melting method is preferable, and the heat sealing method is more preferable.

  The peripheral seal portion may be a top seal portion sealing at least a portion of the top of the bag, a side seal portion sealing at least a portion of the side of the bag, and / or at least a portion of the bottom portion. It is preferred to have the bottom seal sealing. Each of these will be described below.

[Upper seal part]
The upper seal portion is a seal portion that seals at least a portion of the upper portion of the bag body. The upper seal is preferably formed to seal the bag after the bag is filled with contents. Also, in order to secure the space of the contents in the bag, the upper seal is preferably formed along the upper edge of one or more films forming the bag. In the case where the notch guide is formed in the side seal as shown in FIG. 1, the upper seal may be a relatively wide area. On the other hand, when the notch guide portion is formed in the upper seal portion as shown in FIG. 3, the upper seal portion can be made a relatively narrow region.

[Bottom seal portion]
The bottom seal is a seal that seals at least a portion of the bottom of the bag. The bottom seal seals the lower edges of the pair of films forming the bag; fold the film, and insert the folded bottom member into the bottom of the folded film, and the bottom of the folded film And the bottom member at least a portion of the bottom member; or formed by sandwiching and sealing the folded bottom member with a pair of films.

  The bottom seal is preferably bottom-shaped in order to inflate the sack portion of the sack and to provide self-sustaining properties to the sack and / or secure the space of the contents within the sack. For example, folding the film and placing the folded bottom member into the bottom of the folded film to seal the bottom of the folded film and at least a portion of the bottom member; or the folded bottom member By sandwiching and sealing with a pair of films, a bottom seal with a bottom can be obtained.

[Side seal part]
The side seal is a seal that seals at least a part of the side of the bag. Preferably, the side seals are formed along the side edges of the film or films that form the bag in order to ensure space for the contents within the bag.

  The length of the side seal portion may be about 1.1 times or more, about 1.3 times or more, about 1.5 times or more or about 2 times or more of the length of the top seal portion or the bottom seal portion. The length of the partial seal may be about 10 times or less, about 9 times or less, or about 8 times or less the length of the top seal or bottom seal.

  Generally, when a single film is folded to form a bag, at least one side seal is formed. On the other hand, when forming a bag body by a pair of films, at least two side seal parts are formed.

  In general, when the bag body is formed of a plurality of films, since the both sides of the bag body are sealed, the first side seal portion and the second side seal are formed as the side seal portion.

  As shown in FIGS. 1-4, in a first embodiment of the bag of the present invention, the first side seal extends upwardly from one edge of the bottom seal and the sides of the pair of films Seal the part, but do not have to reach the upper seal part.

  On the other hand, the second side seal may extend upward from the other edge of the bottom seal, seal the sides of the pair of films, and reach the top seal.

  In that case, among the two ends of the first side seal, the end not in contact with the bottom seal (that is, the upper end not reaching the top seal) should be in contact with the inner circumferential seal 4. Can. Thus, the upper end of the first side seal can correspond to one end of the inner circumferential seal 4.

[Perimeter unsealed part]
The peripheral unsealed portion means a portion not sealed at the peripheral portion of the film. In the present invention, when the peripheral seal portion is formed only on a part of the peripheral portion of the film, the peripheral unsealed portion is formed.

  Specifically, the peripheral edge non-sealed portion, the peripheral edge sealing portion and the inner peripheral sealing portion can be arranged to surround the peeling trigger portion. In that case, it is preferable that the bag body is cut away from the tear guide portion to remove at least a part of the peripheral seal portion (in particular, the upper seal portion), since the peeling trigger portion is easily grasped from the peripheral unsealed portion.

  As shown in FIGS. 1 to 4, in the first embodiment of the bag according to the present invention, the peripheral edge unsealed portion, the peripheral edge sealing portion 2 on three sides of the triangle when the peeling trigger portion 4 has a triangular shape. A portion of the (i.e., the upper seal portion) and the inner circumferential seal portion 11 can be disposed, respectively. In this case, as shown in FIG. 5 (b), in the first embodiment of the bag according to the present invention, when the upper seal portion is removed, two sides of the peeling trigger portion 4 are not sealed. Therefore, the peeling trigger part 4 becomes easy to pinch. As shown in FIG. 5A, in the first embodiment of the bag body of the present invention, the peeling trigger portion 4 can be pinched from the non-sealed portion even before the upper seal portion is removed. As shown in FIG. 5C, by removing the upper seal portion, a new side of the peeling trigger portion 4 can be formed to make the peeling trigger portion 4 relatively easy to grip.

[Inner seal part]
The inner peripheral seal portion is a seal portion sealing a part of the inner side of the peripheral edge portion of the film, and when the peripheral edge seal portion 2 is formed only on a part of the peripheral edge portion of the film, It is a seal part which has sealed the bag part integrally.

  The sealing method for forming the inner circumferential seal may be as described above as a sealing method for forming the peripheral seal.

  The position of the inner peripheral seal portion may be arbitrarily determined according to the shape of the bag body, the peeling trigger portion or the bag portion, but for example, the inner peripheral seal portion intersects the upper side, the side or the bottom side of the bag body Preferably, it can be formed in a direction oblique to any of these sides.

  In the first embodiment of the present invention, as shown in FIGS. 1 to 4, the inner peripheral seal portion 11 is formed obliquely from the upper end of one side seal portion toward the upper seal portion, and It can be at least a part of the boundary between the peeling trigger part 4 and the sack part 3.

[Bag part]
The sack portion is a portion formed by sealing a part or the whole of the peripheral portion of the film with the peripheral seal portion to store the contents. The contents are, for example, solid, liquid, gas, gel and the like.

  Usually, in a state where the contents are stored in the bag portion, the peripheral portion of the bag body is sealed by the peripheral seal portion to seal the bag portion. In this case, at least a part of the peripheral seal portion (for example, the upper seal portion) is removed from the bag body, and a new side is formed in the peeling trigger portion, and this one side is gripped to peel the outer layer, The opening or vent of the inner layer can be exposed to open the contents.

  In the first embodiment of the present invention, as shown in FIGS. 1 to 4, the bag body 3 is sealed by the peripheral seal portion 2 and the inner peripheral seal portion 11. In this case, the peripheral seal portion 2 of the bag body 1 is cut away from the tear guide portion 5, and a portion of the peripheral seal portion 2 (for example, the upper seal portion) is removed while maintaining the sealed state of the bag portion 3. can do. Then, by forming a new side in the peeling trigger portion 4 and grasping this one side to peel the outer layer, the opening or the ventilation portion of the inner layer can be exposed.

  Further, in the first embodiment of the present invention, the contents of the liquid are stored in the bag portion. In this case, when the bag portion is cut off from the tear guide portion 5 and the peelable outer layer 9 is peeled off, the opening 6 is formed in the bag portion, so that the liquid content can be discharged from the bag portion .

  In another embodiment of the present invention, as shown in FIG. 7, the bag portion 3 is sealed by being surrounded by the peripheral seal portion 2 and the inner peripheral seal portion 11. In addition, even if the bag 1 ′ is cut off from the guide 5 and a part of the peripheral seal 2 (for example, the upper seal) is removed from the bag 1 ′, the peripheral seal 2 and the inner peripheral seal 11 At the same time, the bag 3 remains sealed.

The bag portion is preferably formed by any of the following methods I to V:
Method (I) in which the laminated film is folded so that the inner layers face each other and the folding portion is M-shaped, and the upper and both sides of the folded film are sealed by the peripheral sealing portion;
Method of folding the laminated film so that the inner layers face each other and the folding portion is on one side, and sealing the other side, top and bottom of the folded film with a peripheral seal (II) ;
The laminated film is folded so that the inner layers face each other and the folds are on one side, and a double-folded bottom member is placed in the bottom of the folded film, and the bottom of the folded film Method (III) of sealing at least a portion of the bottom member with a peripheral seal and sealing the other side and the top of the folded film with a peripheral seal;
Method (IV) of laminating the laminated film and another film and sealing the top, both sides and the bottom with a peripheral seal (IV); or a two-folded bottom member sandwiched between the laminated film and the other film, top, both sides And a method of sealing the bottom with a peripheral seal (V).

  Further, in order to provide the bag body with a self-standing property, the bottom of the bag portion is preferably bottom-shaped. For example, if the sack portion is formed by the above method (I), (III) or (V), the bottom portion of the sack portion can be made bottom-shaped.

[Peeling trigger section]
The peeling trigger portion is a portion serving as a trigger for peeling the peelable outer layer. The peel trigger can be formed as part of the peelable outer layer, as part of the inner layer, or as part of a laminated film comprising the inner layer and the peelable outer layer.

  The position of the peeling trigger in the bag may be arbitrarily determined as long as it is arranged so that part or all of the peeling trigger can not easily be pinched. For example, the peeling trigger portion is preferably formed so as not to protrude outward from the peripheral portion of the film.

  On the other hand, when the bag body is cut and cut from the guide portion, a new side of the peeling trigger portion is formed, and the peeling trigger portion becomes easy to grip. Note that the new side of the peeling trigger portion may be a straight line or a curved line. For example, until the bag is cut away from the tear guide portion, the peeling trigger portion is apparently hardly recognized, but the peel trigger portion can be made to appear immediately after the bag body is cut away from the tear guide portion. .

  In this way, by changing the ease of pinching the peeling trigger before and after tearing the bag, it is possible not only to prevent damage or detachment of the peeling trigger during transportation of the bag, but also before cutting from the tear guide. It is possible to prevent the user's mistake of exfoliating the outer layer.

  In the first embodiment of the present invention, as shown in FIGS. 1 to 4, the peeling trigger portion 4 can be formed in proximity to one of the side portions of the bag body 1. In that case, the region of the peeling trigger portion 4 in the bag body 1 is arbitrarily determined in accordance with the peripheral seal portion 2, the inner peripheral seal portion 11, the peripheral non-sealed portion, the tear guide portion 5 and the inner layer half cut 12 for peeling trigger. can do.

  Further, as shown in FIGS. 5 (a) and 5 (b), when the bag 1 is torn along the intended tear line and the upper seal portion of the peripheral seal portion 2 is removed, the new side of the peeling trigger portion 4 is obtained. Is formed as a part of the laminated film 7 including the inner layer 8 and the peelable outer layer 9, whereby at least a part of the peeling trigger portion 4 is easy to pinch. Furthermore, as shown in FIG. 5C, when the peeling trigger portion 4 is pinched and pulled, the peelable outer layer 9 can be peeled at the boundary of the inner layer half cut 12.

  In the second embodiment of the present invention, as shown in FIG. 7, the peeling trigger portion 4 of the bag body 1 ′ is formed so as not to approach the peripheral seal portion 2 and to be integrated with the bag portion 3. It can be done. In other words, the peeling trigger 4 does not protrude outward from the bag 1 ′ and can be embedded in the bag 3.

  Further, from FIGS. 8A and 8B, the region of the peeling trigger portion 4 in the bag 1 ′ corresponds to the peripheral seal portion 2, the bag 3, the tear guide portion 5 and the solid printing portion 14 of the peeling agent. It is clear that it is decided. In that case, when the bag 1 'is torn along the intended line of tearing and the upper seal portion of the peripheral seal portion 2 is removed, the new side of the peeling trigger portion 4 appears as a part of the peelable outer layer 9. Do.

  Therefore, the adhesion between the inner layer 8 and the outer layer 9 is inhibited by the solid printed portion 14 of the release agent at the position corresponding to the peeling trigger portion 4 in the laminated film 7. By putting a finger or the like, the peeling trigger part 4 can be easily pinched.

  In the third embodiment of the present invention, as shown in FIGS. 9 and 10, the portion of the liquid impermeable film facing the peeling trigger is at least partially removed to form the peeling trigger. The inner surface is at least partially exposed. Here, the inner surface of the peeling trigger part means the surface on the opposite side to the outer layer peeled by the peeling trigger part.

  According to this, as shown in FIG. 11 (b), there is a region not overlapping with each other between the peeling trigger portion 4 and the portion opposed to the peeling trigger portion, so that the bag body is cut from the tear guide portion. Since the non-overlapping area can be pinched after being torn, the peeling trigger part becomes easier to pinch.

  In the third embodiment of the present invention, the shape of the portion opposed to the peeling trigger portion may be a shape obtained by removing an arbitrary shape from the shape of the peeling trigger portion. For example, the shape of the portion facing the peeling trigger may be a trapezoid in which the triangle is removed from the shape of the peeling trigger which is a triangle as shown in FIG.

[Cutting guide]
The tear guide portion is a portion that allows at least a part of the peripheral seal portion to be cut to tear the bag body while maintaining the sealing performance of the bag portion. The tear guide may be formed as a trigger for initiating tearing of the bag or as a guide for determining the boundary between the peripheral seal and the bag.

  The position and form of the tear guide in the bag can be arbitrarily determined as long as at least a part of the peripheral seal can be removed by tearing the bag while maintaining the sealability of the bag. In any case, it is preferable that the planned tear line intersect with the peeling trigger portion in order to form a new side of the peeling trigger portion after tearing the bag from the tear guide portion and to make it easy to pinch the peeling trigger portion. .

  For example, as shown in FIG. 5, after tearing off the peripheral seal portion 2 from the tear guide portion 5, the peeling trigger portion 4 is torn while maintaining the sealability of the bag portion 3.

  For example, as shown in FIGS. 5 (a) and 5 (b) and FIGS. 6 (a) and 6 (b), when at least a part of the peripheral seal 2 is removed from the tear guide along the planned tear line, A new side of the peeling trigger portion 4 is formed, a part of the peeling trigger portion 4 becomes easy to pinch, and the upper portion of the bag portion opens.

  As a tear guide, for example, a notch, a line, a hole or the like may be formed alone or in combination. For example, the tear guide may be in the form of a Magic CutTM.

  The notch in the bag allows the user to tear the bag along any tear line starting from the notch so that at least a portion of the peripheral seal and the bag can be separated.

  In addition, when the film forming the bag body includes a stretched film such as a uniaxially stretched film, it is preferable to arrange the notch at a position where the bag body can be cut along the stretching direction of the stretched film starting from the notch. .

  Although the form of the notch as the tear guide is not limited, it may be, for example, a V-type, an I-type or the like.

  The line and / or hole as the tear guide is preferably formed along a predetermined tear line which can separate at least a part of the peripheral seal and the bag. It is also preferred that the lines and / or holes be formed with the notches.

The line as the tear guide may be solid or dotted, and may be singular or plural. Also, the line is preferably engraved as a half cut line in the inner layer and / or the outer layer by, for example, CO ₂ laser irradiation.

  The hole as the tear guide may be single or plural. For example, it is preferable to form a large number of holes along a planned tear line with a wound roll or the like. In that case, the hole diameter of one hole is preferably about 0.1 mm or more or about 0.2 mm or more, and the hole diameter is preferably about 0.4 mm or less or about 0.3 mm or less.

[Open or vent]
When the peelable outer layer is peeled off from the bag of the present invention, the opening or the vent is exposed to the remaining inner layer.

  The opening is preferably capable of venting or discharging the contents which are, for example, liquid. For example, it is preferable that the vent can discharge the content which is, for example, a gas, or it is preferable that the content which is volatile or the content which is gas adsorptive can be vented to the outside.

  In order to expose the openings or vents of the inner layer by peeling off the outer layer, the openings or vents may be previously formed in the inner layer by punching, and the half corresponding to the outline of the openings or vents. It is preferable to form a cut and the like. The vent may be provided by forming a part of the inner layer with a porous material or the like.

  As the shape of the opening or the vent, for example, in addition to a circular shape, an oval shape, a rounded rectangular shape, an oval shape, a triangular shape, a quadrangular shape, a polygonal shape having five or more sides, or the like can be freely selected. The number of openings or vents may be one or more, but usually more than one is preferred.

  The position of the openings or vents in the inner layer can be determined according to, but not limited to, the size and arrangement of contents, the amount of contents that are liquid, and the like.

  In one embodiment of the bag according to the present invention, as shown in FIGS. 6 (c) and 6 (d), when the outer layer 9 peels off, the portion of the inner layer 8 surrounded by the opening inner layer half cut 13 The opening or vent 6 can be formed since it is removed concomitantly in the state of being attached to the outer layer 9. Also, the opening or vent 6 may be sized to allow water to pass through but not allow the contents 15 to pass, thereby providing the bag with a liquid drainage mechanism.

  The portion of the inner layer 8 surrounded by the opening inner layer half cut 13 has a cornerless circle, an oval, a rounded rectangle, an oval, etc. so as not to cause a catch when attached to the outer layer 9 and extracted. Is preferred.

[Bottom member]
The bottom member is an additional member that forms the bottom of the bag. Generally, when the bag is formed of one or more films without using the bottom member, the bag becomes a flat bag. On the other hand, by forming a bag using the film and the bottom member in combination, the bag can be made self-supporting to obtain a standing pouch. In addition, it is preferable that the bag body is provided with the bottom member because the capacity of the bag body is increased.

  In addition, when the bag is formed using the folded bottom member, it is possible to prevent the bulk of the bag and to improve the displayability of the bag before storing the contents in the bag. So preferred. In the embodiment of the present invention, the bottom of the bag portion is bottomed by forming the bag body using the folded bottom member and the film.

  Further, as shown in FIGS. 1 to 4, when there is a notch 16 penetrating both surfaces of the doubled bottom member, when forming the bottom seal portion of the bag body 1, a pair of films or folds are formed. It is preferable because both sides of the formed film can be directly adhered.

  Furthermore, when heat sealing the bottom member and the film, if a heat seal bar having irregularities is used, the unsealed portion 17 is left according to the recess of the seal bar as shown in FIGS. It is preferable because an air pool that sometimes occurs can be intentionally guided to the unsealed portion 17 to improve the appearance of the bottom seal portion.

[Contents]
The contents stored in the bag may be solid, liquid, gas, gel or the like. As a specific content, an aromatic agent, a deodorizing agent, adsorption agent, a volatile chemical | medical agent etc. can be mentioned, for example.

<Method of manufacturing bag body>
The bag of the present invention can be manufactured, for example, by a method including the following steps:
(A1) extruding or dry laminating a sealant on the inner surface base layer to form a sealant layer to obtain a laminate Ia;
(A2) providing an outer surface base layer, and extruding and laminating an easily peelable resin between the inner surface base layer side of the laminate Ia and the outer surface base layer to obtain a laminate IIa;
(A3) A cutter such as a die-cut roller is used to cut from the sealant layer side of the laminate IIa to form an inner layer half cut for peeling trigger and an inner layer half cut for opening, to obtain a processed laminate IIa Process;
(A4) providing a film having substantially the same outer shape as the processed laminate IIa, and a bottom member folded in two;
(A5) A bottom seal, a two-sided seal, and a sandwich formed by sandwiching the bottom member folded in half between the processed laminate IIa and the film so that the sealant layer side of the processed laminate IIa is the inner surface of the bag. Forming an inner peripheral seal portion to obtain a bag intermediate body A; and (a6) forming a tear guide in the bag intermediate body A.

Also, the bag of the present invention can be manufactured, for example, by a method including the following steps:
(B1) printing a release varnish layer on the inner surface base layer in a solid pattern and a dot pattern;
(B2) extruding or dry laminating the sealant on the side of the inner surface base layer not printed with the release varnish layer to form a sealant layer to obtain a laminate Ib;
(B3) Providing an outer surface base layer, bonding the outer surface base layer to the side on which the peelable varnish of the laminate Ib is printed via a dry laminating adhesive, to obtain a laminate IIb;
(B4) A step of forming an inner layer half cut for opening by engraving from the sealant layer side of the laminate IIb using a cutter such as a die cut roller, and obtaining a processed laminate IIb;
(B5) providing a film having substantially the same outer shape as the processed laminate IIb, and a bottom member folded in two;
(B6) A bottom seal and a both-side seal are formed by sandwiching the doubled bottom member between the processed laminate IIb and the film so that the sealant layer side of the processed laminate IIb is the inner surface of the bag. And (b7) forming a tear guide in the bag intermediate B.

  Instead of forming the inner layer half cut for opening in step (a3) or (b4), or in addition to the formation of the inner layer half cut for opening, punching laminate Ia or Ib in step (a1) or (b2) Alternatively, an opening or a vent may be formed in the laminate Ia or Ib.

Before step (a6), during step (a6) or after step (a6), or before step (b7), during step (b7) or after step (b7), optionally using a CO ₂ laser irradiator or the like It is also possible to form a half cut line which is a planned tear line from the outer layer side of the bag intermediate body A or B.

  Step (a5) or (b6) can be performed by heat sealing.

  In the step (a5), it is preferable to seal the bottom and both sides of the object to be sealed. At that time, it is also preferable to seal to form an inner peripheral seal portion. Also, one side is preferably partially sealed and has a peripheral unsealed portion. It is also preferable that an inner circumferential seal portion be formed in a generally oblique direction from the upper end of the side seal portion at the side portion having the peripheral unsealed portion.

  Also, after step (a6) or step (b7), the contents may be stored in the bag intermediate A or B, and / or the upper portion of the bag intermediate A or B may be sealed.

  Here, a method of manufacturing a bag according to an embodiment of the present invention and a method of manufacturing a bag according to another embodiment of the present invention will be described below.

[Method of Manufacturing Bag According to First Embodiment of the Present Invention]
In this embodiment, a bag as shown in FIG. 1 is manufactured.

[Preparation of Liquid Impermeable Laminated Film]
Prepare the materials shown below:
O-Ny film (thickness: 25 μm): "Super Neal E" manufactured by Mitsubishi Plastics.
PET film (thickness: 8 μm): "CB901" manufactured by KOLON
PET film (thickness: 12 μm): Toyobo "E5100"
HDPE film (thickness: 35 μm): "H-500S" manufactured by Aisero Chemical Industries, Ltd.
LLDPE film (Thickness: 30 μm): “Suzuron L-105” manufactured by Aisero Chemical Industries, Ltd.
Dry laminating adhesive: "TM265M + CAT RT37" manufactured by Toyo Moreton Co., Ltd.
Easy-to-peel resin: A mixture of 95% by mass of LDPE (Tosoh Corp. "Petrocene 226") and 5% by mass of COC (Mitsui Chemicals Corp. "Apel 6013 B")

A dry laminator is used, the application amount of the dry laminating adhesive is set to 3 g / m ² , and the O-Ny film and the PET film “CB901” are adhered via the dry laminating adhesive to obtain a member a.

Using a dry laminator, set the amount of dry laminating adhesive applied to 3 g / m ² , adhere the HDPE film to the PET film “CB 901” side of member a via the dry laminating adhesive, and set member b obtain.

A dry laminator is used, the application amount of the dry laminating adhesive is set to 3 g / m ² , and the PET film “E5100” and the LLDPE film are adhered via the dry laminating adhesive to obtain a member c.

  Using an extrusion laminator, the easily peelable resin is extruded between the HDPE film side of member b and the PET film “E5100” side of member c at a temperature of about 320 ° C. to about 345 ° C. Get

  The laminated film d is called "O-Ny film (25) // PET film (8) // HDPE film (35) / peelable resin layer (20) / PET film (12) // LLDPE film (30)". It has a layer structure. Here, the numerical values in parentheses represent thickness (μm), and "//" represents a dry laminating adhesive.

  Moreover, in the laminated film d, "PET film (12) // L LDPE film (30)" corresponds to the inner layer, and "O-Ny film (25) // PET film (8) // HDPE film (35)" Corresponds to the peelable outer layer.

[Method of manufacturing bag body]
A laminated film d, a liquid impermeable film e different from the laminated film d, and a bottom member f are prepared.

  With a flexible die, an inner layer half cut for peeling trigger and an inner layer half cut for opening are formed in the inner layer of the laminated film d.

A tear guide portion and a tear line are formed in the laminated film d and the liquid impermeable film e with a CO ₂ laser irradiator.

  The bottom member f is punched to form a notch.

  Using a heat sealer, under the condition of a temperature of 160 ° C., a pressure of 0.3 MPa, and a sealing time of 1.5 seconds, the laminated film d and the liquid impermeable film e sandwich and seal the bottom member f A bag intermediate g having a bottom seal is obtained.

  Using a heat sealer, seal both sides of the bag intermediate g under the conditions of a temperature of 160 ° C., a pressure of 0.3 MPa and a sealing time of 1.5 seconds, and at the same time trim the side seals. , Obtain a bag intermediate h.

  The contents such as the fragrance are filled in the bag intermediate h.

  Using a heat sealer, the upper part of the bag intermediate body h is formed at the peeling trigger portion under the conditions of a temperature of 160 ° C., a pressure of 0.3 MPa and a sealing time of 1.5 seconds A planned tear line is sealed so as to be included in the upper seal portion to obtain a bag as shown in FIG.

[Method of Manufacturing Bag According to Second Embodiment of the Present Invention]
In this embodiment, a bag as shown in FIG. 7 is manufactured.

[Preparation of Liquid Impermeable Laminated Film]
Prepare the materials shown below:
O-Ny film (thickness: 15 μm): "Super Neal E" manufactured by Mitsubishi Plastics.
O-Ny film (thickness: 15 μm): “Sant Neir SNR-W” manufactured by Mitsubishi Plastics.
O-Ny film (thickness: 15 μm): "Sant Neir SNR" manufactured by Mitsubishi Plastics.
PET film (thickness: 12 μm): Toyobo "E5200"
Easy peel film (thickness: 30 μm): DIC "DIFAREN 1900T"
Dry laminating adhesive: "A-620 + A-65" manufactured by Mitsui Chemicals, Inc.
Release agent: "Polycoat P-91 (solid content: 10%)" manufactured by DIC Graphics, Inc. "Silicone-based / cellulose-based"

Using a dry laminator, setting the applied amount of the dry laminating adhesive to 3 g / m ² , bonding the O-Ny film “Super Neal E” and the PET film via the dry laminating adhesive, the member i is obtain.

Using a dry laminator, set the applied amount of dry laminating adhesive to 3 g / m ² and adhere the O-Ny film “Santoneal SNR-W” to the PET film side of member i through the dry laminating adhesive To obtain a member j.

  A release agent is printed in a solid pattern and a dot pattern on an O-Ny film "Santonyl SNR" to form a release agent printed portion.

Using a dry laminator, the dry laminate adhesive coating amount is set to 3 g / m ² , and the release agent printing of the O-Ny film “Santoneal SNR-W” side of the member j and the O-Ny film “Santoneil SNR” The part side is adhered through a dry laminating adhesive to obtain a member k.

Using a dry laminator, set the dry laminate adhesive application amount to 3 g / m ² and adhere an easy peel film to the O-Ny film “Santoneal SNR” side of member k via the dry laminate adhesive. , To obtain a laminated film l.

  The laminated film 1 was prepared by adding “O-Ny (15) // PET (12) // O-Ny (15) // releasing agent printed portion (−) / O-Ny (15) // Easy peel film (30) Layer structure ". Here, the numerical values in parentheses represent thickness (μm), and "//" represents a dry laminating adhesive.

  Further, in the laminated film I, "O-Ny (15) // Easy peel film (30)" corresponds to the inner layer, and "O-Ny (15) // PET (12) // O-Ny ( 15) corresponds to the peelable outer layer.

[Method of manufacturing bag body]
A laminated film l, a liquid impermeable film m different from the laminated film l, and a bottom member n are prepared.

  Using a flexible die, a plurality of opening annular half-cut lines are engraved at a depth from the easy peel film surface of the laminated film l to the release agent printing portion.

A tear guide portion and a predetermined tear line are formed in the laminated film 1 and the liquid impermeable film m with a CO ₂ laser irradiator.

  The bottom member n is punched to form a notch.

  Using a heat sealer, under the condition of a temperature of 160 ° C., a pressure of 0.3 MPa and a sealing time of 1.5 seconds, seal the bottom member n with the laminated film 1 and the liquid impermeable film m, A bag intermediate o having a bottom seal is obtained.

  Using a heat sealer, seal both sides of the bag intermediate o under the conditions of a temperature of 160 ° C., a pressure of 0.3 MPa and a sealing time of 1.5 seconds, and at the same time trim the side seals. , Obtain bag intermediate p.

  The contents such as the fragrance are filled in the bag intermediate p.

  Using a heat sealer, seal the top of the bag intermediate p under the conditions of a temperature of 160 ° C., a pressure of 0.3 MPa and a sealing time of 1.5 seconds to obtain a bag as shown in FIG. obtain.

[Method of Manufacturing Bag According to Third Embodiment of the Present Invention]
In this embodiment, a bag as shown in FIG. 9 is manufactured.

[Preparation of Liquid Impermeable Laminated Film]
Prepare the materials shown below:
O-Ny film (thickness: 25 μm): "Super Neal E" manufactured by Mitsubishi Plastics.
PET film (thickness: 8 μm): "CB901" manufactured by KOLON
PET film (thickness: 12 μm): Toyobo "E5100"
HDPE film (thickness: 35 μm): "H-500S" manufactured by Aisero Chemical Industries, Ltd.
LLDPE film (Thickness: 30 μm): “Suzuron L-105” manufactured by Aisero Chemical Industries, Ltd.
Dry laminating adhesive: "TM265M + CAT RT37" manufactured by Toyo Moreton Co., Ltd.
Easy-to-peel resin: A mixture of 95% by mass of LDPE (Tosoh Corp. "Petrocene 226") and 5% by mass of COC (Mitsui Chemicals Corp. "Apel 6013 B")

A dry laminator is used, the application amount of the dry laminating adhesive is set to 3 g / m ² , and the O-Ny film and the PET film "CB901" are adhered via the dry laminating adhesive to obtain a member q.

Using a dry laminator, set the dry laminating adhesive application amount to 3 g / m ² , adhere the HDPE film to the PET film “CB 901” side of the member q via the dry laminating adhesive, and set the member r obtain.

A dry laminator is used, the application amount of the dry laminating adhesive is set to 3 g / m ² , and the PET film “E5100” and the LLDPE film are adhered via the dry laminating adhesive to obtain a member s.

  Using an extrusion laminator, the easy peeling resin is extruded between the HDPE film side of the member r and the PET film “E5100” side of the member s at a temperature of about 320 ° C. to about 345 ° C. Get

  The laminated film t is called "O-Ny film (25) // PET film (8) // HDPE film (35) / peelable resin layer (20) / PET film (12) // LLDPE film (30)". It has a layer structure. Here, the numerical values in parentheses represent thickness (μm), and "//" represents a dry laminating adhesive.

  Moreover, in the laminated film t, “PET film (12) // L LDPE film (30)” corresponds to the inner layer, and “O-Ny film (25) // PET film (8) // HDPE film (35)” Corresponds to the peelable outer layer.

[Method of manufacturing bag body]
A laminated film t, a liquid impermeable film u different from the laminated film t, and a bottom member v are prepared.

  An inner layer half cut for peeling trigger and an inner layer half cut for opening are engraved on the inner layer of the laminated film t with a flexible die, and a partial unsealing half cut is engraved on the outer layer of the laminated film t.

A tear guide portion and a predetermined tear line are formed in the laminated film t and the liquid impermeable film u with a CO ₂ laser irradiator.

  Each film of the laminated film t in which the inner layer half cut and the tearing line are formed, the liquid impermeable film u in which the tearing line is formed, and the bottom member film v is fed out from the bag making machine.

  After the delivery, the bottom member v is folded in half, and then the folded half member v is punched at a position corresponding to the notch (16) of the bottom member v in FIG. Form a notch (16).

  Similarly, after feeding out, the liquid impervious film u is punched at a position opposite to the peeling trigger portion (4) in FIG. 7 and a notch for partially exposing the inner surface of the peeling trigger portion. Form

  Thereafter, the two-folded bottom member v having the notch (16) is sandwiched between the laminated film t and the liquid impermeable film u having the notch.

  After heat sealing the bottom seal using a heat sealer under the conditions of a temperature of 160 ° C., a pressure of 0.3 MPa and a seal time of 1.5 seconds, the side seal and the inner circumferential seal are Heat sealing is performed to form a continuous bag in which the upper seal portion is not sealed.

  In the next step, the bags in a continuous state are punched to form a tear guide portion, and further cut into one separated bag shape using a cutting blade to obtain a bag intermediate w Get

  The contents such as the fragrance are filled in the bag intermediate w.

  Using a heat sealer, the upper part of the bag intermediate w is formed at the peeling trigger portion under the conditions of a temperature of 160 ° C., a pressure of 0.3 MPa and a sealing time of 1.5 seconds. A planned tear line is sealed so as to be included in the upper seal portion to obtain a bag as shown in FIG.

DESCRIPTION OF SYMBOLS 1, 1 'sack body 2 peripheral seal part 3 sack part 4 peeling trigger part 5 tearing guide part 6 opening 7 film (laminated film)
8 inner layer 9 peelable outer layer 9a outer layer half cut 10 film (film opposed to laminated film)
11 inner periphery seal portion 12 peeling start inner layer half cut 13 opening inner layer half cut 14 release agent solid print portion 15 contents 16 bottom member notched portion 17 unsealed portion 18 release agent dot print portion

Claims (15)

A bag (1, 1 ') formed of a film or films, and at least one of said films being a laminated film comprising an inner layer and a peelable outer layer,
A peripheral seal (2) which seals a part or all of the peripheral part of the film to form a bag (3) containing the contents;
An inner circumferential seal portion (11) which seals a part of the inner side of the peripheral portion of the film and which seals the bag portion (3) integrally with the peripheral seal portion (2);
A tear guide (5) capable of tearing the bag (1, 1 ') by removing at least a part of the peripheral seal (2) while sealing the bag (3); And a peeling trigger portion (4) as a peeling trigger of the peelable outer layer;
Equipped with
When the bag body (1, 1 ') is cut from the tear guide portion (5), a new side of the peel trigger portion (4) is formed, and the peel trigger portion (4) becomes easy to pinch, and A bag (1, 1 ') in which the opening or vent (13) of the inner layer is exposed when the peelable outer layer is peeled off.   The bag according to claim 1, wherein a part of the film facing the peeling trigger (4) is at least partially removed to at least partially expose the inner surface of the peeling trigger. body.   The bag body according to claim 1 or 2, further comprising an inner layer half cut for peeling trigger (12) substantially penetrating the inner layer at a boundary between the peeling trigger portion (4) of the outer layer and the remaining part of the outer layer. .   Of the outer layers constituting the laminated film, having the outer layer half cut (9a) engraved from the outer layer side of the laminated film, thereby pinching the peeling trigger portion (4) and peeling the outer layer The bag body according to any one of claims 1 to 3, wherein only a part of is peeled off.   The outer layer is easy to cut, whereby when the peeling trigger portion is pinched to peel the outer layer, the outer layer is cut and only a part of the outer layer is peeled. The bag body according to any one of the above.   The bag according to claim 5, wherein the outer layer is linear cut.   The bag according to any one of claims 1 to 6, wherein the content is a fragrance, a deodorizing agent, an adsorbent, or a volatile drug.   The bag according to any one of claims 1 to 7, wherein the opening or the vent of the inner layer is formed by punching.   The bag body according to any one of claims 1 to 7, wherein an opening inner layer half cut substantially penetrating said inner layer is formed at a position corresponding to the opening of said inner layer or the contour of the vent.   The bag according to claim 8 or 9, wherein the opening or the vent can discharge at least a part of the contents.   The bag according to any one of claims 1 to 10, wherein the inner layer includes a sealant layer as an innermost layer.   The peripheral seal portion (2) is an upper seal portion sealing at least a portion of the upper portion of the bag body (1, 1 ′), a side portion sealing at least a portion of the side portion of the bag body The bag body according to any one of claims 1 to 11, further comprising a sealing portion, and / or a bottom portion sealing portion sealing at least a part of the bottom portion of the bag body. The bag according to any one of claims 1 to 8, which is formed by any of the following methods (I) to (V):
Method (I) in which the laminated film is folded so that the inner layers face each other and the folding portion is in an M shape, and the upper and both sides of the folded film are sealed by the peripheral sealing portion;
A method of folding the laminated film so that the inner layers face each other and the folding portion on one side, and sealing the other side, top and bottom of the folded film with the peripheral seal portion (II );
The laminated film is folded so that the inner layers face each other and the folds are on one side, and a double-folded bottom member is placed in the bottom of the folded film, and the bottom of the folded film Method (III) of sealing the peripheral member with at least a portion of the bottom member with the peripheral seal, and sealing the other side and the top of the folded film with the peripheral seal;
Method (IV) of laminating the laminated film and another film and sealing the top, both sides and the bottom with the peripheral seal (IV); or a two-folded bottom member sandwiched between the laminated film and the other film, top, both Method (V) of sealing the part and the bottom part with the peripheral seal part.   The bag according to claim 13, wherein the bag is formed by the method (I), (III) or (V), and the bottom of the bag is bottom-shaped.   The bag according to claim 14, which is self-supporting.

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