JP6478716B2 - Partially opened laminate - Google Patents

Description

  The present invention relates to a partially opened laminate. In particular, the present invention relates to a partially opened laminate capable of easily peeling a part of an outer layer without using a half cut.

  The partially opened laminated body usually has at least two layers of an outer layer and an inner layer that is detachably laminated on the outer layer, and a part (peeling portion) of the outer layer can be peeled off. A partially opened package having such a partially opened laminate, for example, a partially opened container or bag, is sealed inside before peeling off the peeled portion, and an inner layer portion having an opening after peeling off the peeled portion. Can be distributed between inside and outside.

  For example, in a partially opened package including a solid and a liquid inside, only the liquid can be discharged first by peeling off the peeling portion, and then the package can be largely opened to take out the solid. Moreover, in the partially opened package body containing the solid which absorbs or discharge | releases gas, absorption or discharge | release of gas can be started by peeling a peeling part. Specifically, as such a partially opened bag body, for example, Patent Document 1 relating to a standing pouch for fragrance can be referred to, and as a partially opened container, refer to Patent Document 2 relating to a container for cup fried noodles. can do.

  In the conventional laminated body for partial opening, as shown in FIG. 1, by cutting from the outer layer side to the depth of the outer layer and optionally the depth of the easily peelable resin layer (peeling layer) (half cut), A peeling portion was formed in the outer layer.

  For example, when the laminated body for partial opening is used as a lid for cup fried noodles, the peeled portion (1) has an outer layer side only on a part of the outer layer of the lid (40) as shown in FIG. To form a half cut (1a). When hot water is put into the cup yakisoba container (20), the lid (40) is peeled off about half from the container (20) using the tab (2). Moreover, when discarding hot water from a container (20) after progress for a fixed time, a peeling part (1) is peeled from a peeling trigger part (5), and an opening part (3) is exposed. This opening (3) is formed by half-cutting from the inner layer, and is integrated with the lid inner layer before peeling off the peeling part (1), but when the peeling part (1) is peeled off, the half cut The removed part is accompanied by the peeling part and is removed and exposed.

JP 2013-112367 A JP 2007-320580 A

  An object of this invention is to provide the novel laminated body for partial opening which can peel a peeling part easily, without using a half cut.

The present inventors have found the present invention having the following aspects.
<< Aspect 1 >>
A laminate for partial opening having an outer layer and an inner layer,
The outer layer has a peeling portion that can be peeled off from the inner layer, and a main body portion,
The separation region between the peeling portion and the main body portion of the outer layer is easy-cut,
The inner layer has an opening planned portion that becomes an opening when the peeling portion is peeled off,
Laminated body for partial opening.
<< Aspect 2 >>
The laminate for partial opening according to aspect 1, wherein the outer layer is peelable from the inner layer in substantially all regions and is easily cut.
<< Aspect 3 >>
The laminate for partial opening according to aspect 1 or 2, wherein the easily cut-off separation region has a straight-cut property.
<< Aspect 4 >>
The said outer layer is a laminated body for partial opening as described in any one of aspects 1-3 containing a stretched film.
<< Aspect 5 >>
The said outer layer is a laminated body for partial opening as described in any one of aspects 1-4 containing an outer side base film, a barrier film, and the inner side base film on the said inner layer side in this order.
<< Aspect 6 >>
The laminate for partial unsealing according to aspect 5, wherein the outer base film has a cut so as to have a linear cut property.
<< Aspect 7 >>
The laminate for partial opening according to any one of aspects 1 to 6, further comprising a peeling trigger part for starting peeling of the peeling part.
<< Aspect 8 >>
The laminate for partial opening according to any one of aspects 1 to 7, further comprising a peeling guide part for peeling the peeling part in a specific direction.
<< Aspect 9 >>
The container for partial opening containing the cover material and container which are the laminated bodies for partial opening as described in any one of aspects 1-8.
<< Aspect 10 >>
A partially opening bag body, at least a part of which is formed of the partially opening laminated body according to any one of aspects 1 to 8.

  According to the partially opened laminated body of the present invention, the peeling portion can be easily peeled off without using a half cut.

  Furthermore, the present inventors have found that the barrier properties can be enhanced according to the partially opened laminate of the present invention. This is because in the conventional partial unsealing laminate in which the peeled portion was formed by half-cut, there was a slight flow of moisture, odor, etc. from the gap in the half-cut, whereas for the partial unsealing of the present invention According to the laminate, since it is not necessary to use a half cut, it is considered that such distribution does not occur.

FIG. 1 is a schematic diagram for explaining half-cutting. FIG. 2 is a top view and a side cross-sectional view of a lid member having a peeling portion that has been conventionally formed by half-cut. FIG. 3 is a view illustrating a container with a lid material using the partially opened laminated body of the present invention. FIG. 4 is a view illustrating a bag body using the partially opened laminated body of the present invention. FIG. 5 shows an X-X ′ cross section of FIG. FIG. 6 shows a Y-Y ′ cross section of FIG. FIG. 7 is a graph of the change over time in the weight of the fragrance showing that the bag body using the partially opened laminate of the present invention has high barrier properties. FIG. 8 is a graph of changes over time in the weight of the hygroscopic agent showing that the bag body using the partially opened laminated body of the present invention has high barrier properties. FIG. 9 is a graph of the change over time in the weight of the fragrance showing that the bag body using the partially opened laminate of the present invention has high barrier properties. FIG. 10 is a graph of changes over time in the weight of the hygroscopic agent indicating that the bag body using the partially opened laminated body of the present invention has high barrier properties.

  Hereinafter, embodiments of the present invention will be described in detail. Note that the present invention is not limited to the following embodiments, and can be implemented with various modifications within the scope of the gist of the present invention.

<< Laminated body for partial opening >>
The laminate for partial opening of the present invention has an outer layer and an inner layer. The outer layer has a peeling portion and a main body that can be peeled off from the inner layer, and a separation region between the peeling portion and the main body of the outer layer is easily cut. Further, the inner layer has a planned opening portion that becomes an opening when the peeling portion is peeled off.

  Here, the “peeling portion” is a region of the outer layer that is peeled off from the outer layer, and refers to a region where an opening appears in the inner layer when peeled. The “main body portion” refers to a region other than the peeling portion of the outer layer. In the prior art, the peeled portion was physically separated from the main body portion by half-cutting, so that only a predetermined region was peeled off if the peeled portion was peeled off. However, in the present invention, before the peeling, the peeling portion is not separated from the main body portion. Therefore, the shape of the peeling portion may differ depending on how force is applied when peeling.

  The “expected opening portion” exists in the inner layer laminated on the peeling portion. By peeling off the peeling portion, the planned opening portion becomes an opening, and the liquid inside can be discharged or the inside and outside air can be circulated. The opening planned portion may be, for example, a hole, may be a region defined in the inner layer by half-cutting, may be a mesh-like portion, or may be a film with high gas permeability. . The “opening” is not particularly limited as long as the flowability can be given between the inside and the outside.

  Preferably, the laminate for partial opening of the present invention further has a peeling trigger part for peeling the peeling part. “Peeling trigger part” is a part on the laminate for starting peeling of the peeling part. For example, in a container with a lid using this laminate as a lid, the peeling trigger part is a tab-like part. May be. Preferably, the laminate of the present invention is half-cut from the inner layer side so as to define a peeling trigger portion, or the inner layer does not exist in the peeling trigger portion.

  Preferably, the partially opened laminate of the present invention further includes a peeling guide part for peeling the peeling part in a specific direction. The “peeling guide part” may be a cut existing at the end of the boundary between the peeling part and the main body part. By having both the “peeling trigger part” and the “peeling guide part”, the laminate of the present invention can easily peel the peeling part in a specific direction in a strip shape or the like. In this case, the outer layer has an easy-cut property, preferably a straight-cut property, parallel to the direction in which the peel portion is peeled from the peel guide portion.

<Application>
The laminate for partial opening of the present invention can be used for various partially opened packages or a part thereof. For example, the laminated body for partial opening of the present invention may be a lid, and in this case, it can be used as a partially opened container by being bonded to the container. Moreover, the laminated body for partial opening of this invention can be adhere | attached with another opposing film, and can be used as a partial opening bag body. A partially opened bag can be obtained by folding the partially opened laminate of the present invention and sealing it in three directions, or by sealing two sheets of the partially opened laminate of the present invention in four directions.

  The partially opened package can contain contents such as solid, liquid, gas, and gel. For example, contents such as foods, chemicals, cosmetics, detergents, fragrances, deodorants, dehumidifiers, oxygen absorbers, pharmaceuticals, and medical devices can be accommodated.

<Use-Cover>
When the partially opened laminated body of the present invention is used as a lid member, a high barrier property can be imparted to the lidded container because there is no half cut in the outer layer.

  When using the laminated body for partial opening of this invention as a cover material, a container should just be a container which can be sealed with a cover material. The lid member may have a tab portion for peeling the lid member from the container. The container may have a flange portion that adheres to the lid. An adhesive or the like may be applied to the flange portion for bonding with the lid member, and heat sealing with the inner layer of the laminate may be possible.

  FIG. 3 exemplifies a mode in which the partially opened laminated body of the present invention is used as a lid member.

  FIG. 3 illustrates a container with a lid material using the partially opened laminate of the present invention as a lid material. In Fig.3 (a), the container (100) with a cover material consists of the cover material (40) which consists of a laminated body for partial opening of this invention, and a container (20), and a cover material (40) is a container (20). And a peripheral seal part (4). The lid (40) includes an outer layer (A) and an inner layer (B) that is detachably laminated on the outer layer (A), and the outer layer (A) includes a peeling trigger part (5) that is a knob, and a notch. It has a certain peeling guide part (6), and the inner layer (B) has a planned opening part (3 '). An inner layer half cut (5a) for defining a separation trigger reaching from the inner layer to the separation surface is provided at a boundary portion between the separation trigger portion (5) as a knob and the container flange portion.

  FIG. 3B shows a peeling portion (1) and a main body portion (1 ') of the lid member (40). This peeling part (1) is a part of outer layer (A) which has the easy-cut property of a cover material (40), and the peeling trigger part (5) exists in a peeling part (1). By cutting only the outer layer (A) of the lid member (40) in the direction of the arrow from the peeling trigger portion (5), the peeling portion (1) can be removed. The peeling guide part (6) is very useful for peeling the peeling part (1) in the direction of the arrow. In this invention, since the area | region between peeling part (1) and main-body part (1 ') is easy-cut property, outer layer (A) is removed from peeling trigger part (5) and peeling guide part (6). Can be cut easily.

  FIG.3 (c) has shown the container (100) with a lid | cover material after removing the peeling part (1). After removing the peeling portion (1), the opening (3) is exposed. In this way, the liquid inside the container is discharged, or the outside and the outside air are circulated from the opening (3), and the tab (2) is later used to remove the entire lid (40) from the container (20). Can be peeled off.

<Use-bag body>
The laminated body for partial opening of the present invention can be used as a bag body by adhering to a counter film or bending and sealing it in three directions, or sealing two laminates in four directions. The bag body using the partially opened laminate of the present invention only needs to cut a part of the outer layer in order to expose the opening of the inner layer, and has a high barrier property because there is no half cut in the outer layer. Can be held.

  The bag body may be provided with a tear guide portion (so-called notch) for opening the bag body largely and / or a tear guide portion for enabling the peeling trigger portion. Here, the tearing guide part for enabling the use of the peeling trigger part may seal the peeling trigger part in order to prevent peeling of the peeling part during transportation of the bag body, etc. It is a part of.

  The counter film may be a laminate having a base film, a barrier film, and a sealant, and these may be selected from materials used in the laminate of the present invention described below. In this case, the base film and the barrier film include a single film having a barrier film.

  FIG. 4 illustrates a bag formed by adhering the partially opening laminate of the present invention to a counter film. In Fig.4 (a), the bag body (200) contains the laminated body (10) for partial opening of this invention, and a counter film (30), and these are sealed by the peripheral part. In this state, it is difficult to peel the peeling portion from the peeling trigger portion (5). Thus, peeling of the peeling part from the peeling trigger part (5) can be prevented during transportation of the bag (200). In order to be able to use the peeling trigger portion (5), first, the bag (200) is sealed along the planned tear line from the tear guide portion (7) existing on the upper portion of the bag body (200). The upper seal part (4 ′) of the part (4) is removed.

  FIG. 5A shows the X-X ′ cross section of FIG. The partially opened laminate (10) of the present invention includes an outer layer (A) and an inner layer (B) that is detachably laminated on the outer layer (A). FIG. 6A shows a Y-Y ′ cross section of FIG. In the inner layer (B) of the partially opened laminate (10) of the present invention, there is a planned opening (3 '). In this embodiment, the planned opening (3 ') is formed by half-cutting the inner layer (B).

  FIG. 4 (b) shows the bag (200) in a state where a part of the upper seal part (4 ') is removed from the tear guide part (7) of FIG. 4 (a). By removing a part of the upper seal part (4 '), the peeling part (1) can be easily peeled from the peeling trigger part (5). By pulling the partially opening laminated body (10) of the present invention in the direction of the arrow from the peeling trigger part (5), the peeling part (1) can be removed. Here, the peeling guide part (6) may be a part extending in the horizontal direction of the bag body (200) of the seal part (4). That is, in this embodiment, since the inner layer is bonded to the counter film (30) at the position of the peeling guide portion (6), when the peeling portion (1) is to be peeled off, the inner layer is peeled off along with the outer layer. Torn along 6). And only an outer layer (peeling part) peels in the position where a seal part (4) becomes a perpendicular direction. Although not shown in the figure, the peeling guide part (6) may further have a notch so as to promote peeling of the peeling part (1) in a specific direction.

  Moreover, it is preferable that the boundary part of a peeling trigger part (5) and the seal part (4) in the extension line | wire of a peeling direction is equipped with the inner layer half cut (5a) for peeling trigger definition. It is preferable that the inner layer half cut (5a) for defining the peeling trigger is cut at a depth reaching from the inner layer to the peeling surface. By having the inner layer half cut (5a) for delimiting the trigger for peeling, when the outer layer peeling portion (1) is to be peeled from the inner layer, it can be easily guided to the peeling surface.

  FIGS. 5B and 6B show the X-X ′ cross section and the Y-Y ′ cross section of FIG. 4B, respectively. FIGS. 5B and 6B are lower in height than in FIGS. 5A and 6A due to the removal of the upper seal portion (4 ').

  FIG.4 (c) has shown the bag (200) of the state which removed the peeling part (1). FIGS. 5C and 6C show the X-X ′ cross section and the Y-Y ′ cross section of FIG. 4C, respectively. When the peeling part (1) is removed from the peeling trigger part (5), a part of the inner layer of the peeling part (1) is adhered to the counter film (30) by the sealing part (5), so the sealing part (5) Further, on the bag body center side, only the outer layer (A) is removed, and the opening (3) appears. In this aspect, since it is necessary to tear both the inner layer and the outer layer when removing the peeling portion from the peeling trigger portion (5), in such a case, as the entire laminate of the present invention, It is preferable that it is cut, and it is particularly preferable that the inner layer is easily cut.

<Layer structure>
The laminate of the present invention preferably has a barrier film in the outer layer and / or the inner layer, and the barrier film is cut in the thickness direction in the inner region where the contents are peripherally sealed as a partially opened package. Not. When the barrier film which exists in an outer layer or an inner layer is not cut | disconnected in the thickness direction, since it can provide high barrier property, it is useful.

  The laminate of the present invention may be, for example, 50 μm or more, 70 μm or more, or 90 μm or more, and may be 250 μm or less, 200 μm or less, or 150 μm or less.

<Layer structure-outer layer>
The outer layer of the laminate of the present invention has a peeling portion that can be peeled from the inner layer, and a main body portion. The region between the peeling portion and the main body portion is easy to cut. A part of the outer layer may not be peelable from the inner layer, but is preferably peelable from the inner layer in substantially all regions of the outer layer. Further, a part of the outer layer may not be easily cut, but preferably, substantially all the region of the outer layer is easily cut. The easy-cut property should just be easy-cut property about the direction which peels a peeling part.

  The outer layer may be a single layer or a multilayer. When the outer layer is a multilayer, at least one of the multilayers may not be easily cut. For example, even if at least one of the multilayers is not easy to cut, the other layers are easy to cut and the easy-cutting layer and the non-easy-cutting layer are bonded to each other. A layer that is not cut can also form a multi-layer that is easy to cut.

  Here, easy-cut property means the property that an adult male can tear by hand without feeling great stress in at least one direction. For example, easy cutability means that tear strength in at least one direction is 20.0 N / mm or less, 15.0 N / mm or less, 10.0 N / mm or less, 8.0 N / mm or less, or 5.0 N. / Mm or less. Here, the tear strength is a sample size of 115 mm × 50 mm and a slit in the longitudinal direction of 45 mm, using a trouser tear method based on JIS K7128-1, using a trograph VES1D manufactured by Toyo Seiki Seisakusho Co., Ltd. The test speed is 200 mm / min, the distance between grips is 75 mm, and the measurement distance is 150 mm.

  Moreover, preferably the peeling part has a linear cut property. The linear cut property of a film refers to the property of a film that can be easily torn linearly due to the molecular orientation of the film, etc. For example, a stretched film, particularly a uniaxially stretched film, has a linear cut property, and therefore is preferably used as a part of the laminate at least in the region of the peeling portion of the outer layer. In the case where the peeling portion is linearly cutable in the direction in which the peeling portion is peeled off, the peeling portion can be cut out cleanly, and thereby the planned opening portion can be reliably exposed.

  Usually, even if it is a film that does not have easy cutability and / or straight cut property, for example, an unstretched film, the film is cut to give easy cut property and / or straight cut property. You can also. For example, by cutting with a laser a structure in which a resin film sandwiches an aluminum layer, a cut can be made only in the resin film without damaging the aluminum layer. Moreover, a notch can also be made with only a part of the thickness of the resin film with a rotary cutter or the like. Furthermore, you may provide easy cut property by making a film contain a filler.

  The outer layer preferably includes an outer base film, a barrier film, and an inner base film on the inner layer side. In this case, the outer base film and the barrier film, and the inner base film and the barrier film include a single film having a barrier film.

  As the outer base film and the inner base film, paper, a commercially available film, an extruded resin, or the like can be used as appropriate. For example, if it is a film, a thermoplastic resin film such as 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 film (PP), nylon film (Ny) and the like may be used alone or in combination. For extruded resins, low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), polypropylene (PP), ethylene / vinyl acetate copolymer (EVA) ), Ethylene / methacrylic acid copolymer (EMAA) or the like may be used alone or in combination. These films can be corona treated for the purpose of improving adhesion by modifying the surface or cleaning the surface.

  As the barrier film, a metal foil such as an aluminum foil, an inorganic vapor deposited resin film such as silica vapor deposited PET, a polyvinylidene chloride (PVDC) film, an ethylene vinyl alcohol (EVOH) film, or the like can be used.

  Further, the outer layer may include a resin layer, a paper layer, an adhesive layer and the like other than those described above. Further, a printing layer may be included. In particular, in order to cut a layer that is not easy to cut by following the layer that is easy to cut, the layer that is not easy to cut must be firmly bonded to another layer via an adhesive layer. Is preferred.

  As a preferable aspect of the outer layer, for example, a constitution containing the following film can be mentioned: Thermoplastic resin film such as PET film having a thickness of 10 μm to 50 μm (particularly 10 μm to 30 μm) // 5 μm to 20 μm (particularly, A stretched film (“//”) such as a stretched Ny (O—Ny) film having a thickness of 10 μm to 15 μm) metal foil (aluminum foil) // 10 μm to 50 μm (especially 10 μm to 30 μm) Meaning adhesion by lamination).

  Moreover, as a preferable aspect of an outer layer, the structure containing the following film can be mentioned, for example: Thermoplastic resin films, such as PET film of 10 micrometers-50 micrometers (especially 10 micrometers-30 micrometers) which made the cut | disconnection with the laser /// 5 μm to 20 μm (especially 10 μm to 15 μm) thick metal foil (aluminum foil) // 10 μm to 50 μm (especially 10 μm to 30 μm) thick thermoplastic resin film (“// "Means adhesion by dry lamination).

  Furthermore, as a preferable aspect of the outer layer, for example, a constitution including the following film can be mentioned: three-layer coextruded film of Ny / EVOH / Ny having a thickness of 10 μm to 50 μm (particularly 10 μm to 30 μm) // 10 μm to Stretched film such as stretched Ny having a thickness of 50 μm (especially 10 μm to 30 μm) (“/” means adhesion by coextrusion).

  The thickness of the outer layer is not particularly limited as long as it can provide easy cutability to the peeled portion, but it can be 20 μm or more, 30 μm or more, or 40 μm or more, and 150 μm or less, 100 μm or less, or 80 μm or less.

<Layer structure-inner layer>
As the inner layer of the laminate of the present invention, commercially available films, extruded resins and the like can be used as appropriate. For example, if it is a film, you may use a thermoplastic resin film, for example, PET film, LDPE film, MDPE film, HDPE film, LLDPE film, PP film, Ny film, etc. individually or in combination. As long as it is an extruded resin, LDPE, MDPE, HDPE, LLDPE, PP, EVA, EMAA and the like may be used alone or in combination. The inner layer may include a resin layer other than the above, a paper layer, an adhesive layer, a metal foil layer such as an aluminum foil, an inorganic vapor deposition film layer, and the like. These films can be corona treated for the purpose of improving adhesion by modifying the surface or cleaning the surface.

  The inner layer preferably includes a base film, and may further have a sealant in the outermost layer. The inner layer may further include a barrier film as described above between the base film and the sealant. The inner layer may be composed of a barrier film and a sealant.

  With the sealant, the laminated body for partial opening of the present invention can be heat sealed. The material of the sealant is selected depending on the material such as the container to be sealed. 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 can be provided in the form of, for example, a stretched or unstretched film, a molten resin for extrusion lamination, a coating material for hot melt, and the like.

  Particularly preferred sealants are easy peel sealants with easy peelability, such as sealants in which resins with different compositions are mixed to give a sea-island structure, and sealants that have multiple layers of sealant and become delaminated when opened. .

  The thickness of the inner layer can be, for example, 150 μm or less, 100 μm or less, 80 μm or less, or 60 μm or less, and can be 20 μm or more, 30 μm, or 40 μm or more.

<Layer structure-Easy peelable layer>
Since the outer layer peeling portion and the inner layer of the laminate for partial opening of the present invention need to be peelable from each other, an easily peelable layer may be provided between the outer layer peeling portion and the inner layer. Further, the easily peelable layer may be an easily peelable resin layer, a layer formed by applying a peeling varnish or the like on a portion where the peeling portion and the inner layer are peeled, or a combination of these. .

  The easily peelable resin used for the easily peelable resin layer is preferably a resin in which a cyclic olefin copolymer (COC) is mixed with polyolefin at a predetermined ratio.

  Examples of the polyolefin include polyethylene resin and polypropylene resin, and low density polyethylene (LDPE) is preferable. Examples of LDPE include a trade name “Petrocene” manufactured by Tosoh Corporation and a trade name “Suntech” manufactured by Asahi Kasei Chemicals Corporation.

  The MFR (melt flow rate) of polyolefin is 0.01 g / 10 min or more, 0.1 g / 10 min or more, when measured under the condition of temperature 190 ° C./load 2.16 kg in accordance with JIS K7210, or It may be 1.0 g / 10 min or more, and may be 60 g / 10 min or less, 20 g / 10 min or less, or 10 g / 10 min or less.

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

  The cyclic olefin copolymer (COC) is a so-called Ziegler catalyst, metallocene, which is obtained by converting an α-olefin and a cyclic olefin into hydrocarbon solvents such as hexane, heptane, octane, cyclohexane, benzene, toluene, and xylene. It refers to a copolymer that can be obtained by preparing a catalyst such as a catalyst. Examples of such a copolymer include trade name “Apel” manufactured by Mitsui Chemicals, Inc.

  The COC MFR is in accordance with JIS K7210, measured at a temperature of 190 ° C./load of 2.16 kg, 0.1 g / 10 min or more, 1.0 g / 10 min or more, or 2.0 g / 10 The MFR may be 40 g / 10 min or less, 20 g / 10 min or less, or 10 g / 10 min or less when measured under the condition of temperature 190 ° C./load 2.16 kg. It's okay.

  The easily peelable resin layer can adjust the interfacial peel strength by changing the mixing ratio of LDPE and COC. The content of COC in the easily peelable resin may be 1% by mass or more, or 3% by mass or more, and the content may be 24% by mass or less or 10% by mass or less. If it is such a range, content of COC is preferable because the interfacial peeling between the inner layer or the outer layer (peeling portion) and the easily peelable resin layer becomes easy and the peel strength of both can be easily controlled.

  The thickness of the easily peelable resin layer may be, for example, 10 μm or more or 15 μm or more, and may be 40 μm or less or 25 μm or less in order to achieve both adhesiveness and peelability with the layer to be peeled.

  The easily peelable layer may be a mixture of a nitrocellulose resin and a urethane resin, an amino alkyd resin, a polyamide resin and / or a polyester resin, an aqueous varnish, an oil varnish, an ultraviolet curable varnish, or the like. Good.

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

  When the content of the wax is about 20% by mass or more, picking of another layer adjacent to the release varnish layer can be prevented, and when the content is about 85% by mass or less, the release varnish is preferable. It is preferable because delamination of layers can be prevented. Specifically, as the peeling varnish, “Polycoat P-91” manufactured by DIC Graphics may be used.

<Layer structure-other>
In addition to the above, the laminate of the present invention further has a printed layer, an anchor coat layer for enhancing adhesion between the two layers, a primer layer, etc. between any two layers in addition to the above layers. May be.

  The present invention will be described more specifically with reference to the following examples, but is not limited thereto.

<Production example>
<Manufacture of laminated body 1>
In making the laminate 1 the following materials were used:
Transparent transparent PET film (thickness: 12 μm): “GX-PF”, Toppan Printing Co., Ltd .;
O-Ny film (thickness 15 μm): “Emblem NCBC”, Unitika Ltd .;
PET film (thickness 25 μm): “E5100”, Toyobo Co., Ltd .;
-LLDPE film (thickness 40 μm): “TUX ECF-U”, Mitsui Chemicals, Inc.
Dry laminate adhesive: “Takelac A-525 / Takenate A-50”, Mitsui Chemicals, Inc .;
Easily peelable resin: a mixture of 95% by mass of LDPE (“Petrocene 226”, Tosoh Corporation) and 5% by mass of COC (“Appel 6013B”, Mitsui Chemicals, Inc.).

  In said film, the O-Ny film has linear cut property, and the transparent vapor deposition PET film and PET film were not easy cut property by itself.

First, using a dry laminator, the application amount of the dry laminate adhesive was set to 3 g / m ² , and an O-Ny film was laminated on the vapor deposition surface side of the transparent vapor-deposited PET film to obtain a laminate A as an outer layer. . This laminated body A had easy-cut property and linear cut property.

Also, using a dry laminator, the application amount of the dry laminate adhesive was set to 3 g / m ² , and a PET film and an LLDPE film were laminated to obtain a laminate B as an inner layer.

Then, using an extrusion laminator, sandwich laminate of an easily peelable resin with a thickness of 20 μm on the O-Ny film side of the laminate A and the PET film side of the laminate B at a temperature of about 320 ° C. to about 345 ° C. Thus, a laminated body 1 having the following configuration was obtained (the value in parentheses means the thickness (unit: μm)):
Transparent vapor-deposited PET (12) // O—Ny (15) / Easily peelable resin (20) / PET (25) / LLDPE (40)

<Manufacture of laminated body 2>
In manufacturing the laminate 2, the following materials were used:
<Outer layer>
Outer layer outer PET film (thickness 12 μm): “E5100”, Toyobo Co., Ltd .;
-Adhesive layer (application amount [dry] 3 g / m ² or more): "A620 / A65", Mitsui Chemicals, Inc.-Al foil (thickness 9 µm): "soft aluminum";
Adhesive layer (coating amount [dry] 3 g / m ² or more): “A620 / A65”, Mitsui Chemicals, Inc. Outer layer inner PET film (thickness 12 μm): “Embret PTMB”, Unitika Corporation;
<Adhesive layer between outer layer and inner layer>
Adhesive layer (application amount [dry] 3 g / m ² or more): “A620 / A65”, Mitsui Chemicals, Inc. <inner layer>
Peeling varnish: “Polycoat P-91”, DIC Graphics Corporation.
Inner layer PET film (thickness 12 μm): “Emblet PTMB”, Unitika Ltd .;
Adhesive layer (coating amount [dry] 3 g / m ² or more): “A620 / A65”, Mitsui Chemicals, Inc. • PP film (thickness 30 μm): “P1128”, Toyobo Co., Ltd .;

  Among these, Al foil has easy-cut property, but PET film and PP film did not have easy-cut property and straight-line cut property.

  In the production of the outer layer, a laminate C was obtained by adhering via an adhesive using a dry laminator so that the outer layer outer PET layer, the aluminum layer, and the outer layer inner PET layer were laminated. In addition, the order at the time of laminating | stacking each layer may be arbitrary.

  The outer outer layer PET film on one side of the laminate C was subjected to CO2 laser processing, and the Al foil was not cut, and only the outermost layer PET was cut. Thereby, easy-cut property and straight-line cut property were imparted to the laminate D.

  Next, in the production of the inner layer, a gravure printing machine is used, and the release agent “Polycoat P-91” manufactured by DIC Graphics Co., Ltd. It applied by the pattern or the dot pattern.

Further, in the production of the inner layer, the side of the inner layer side PET layer not coated with the release agent “Polycoat P-91” and the sealant layer are bonded via an adhesive with strong dry laminator, and the following configuration A laminate 2 was obtained:
PET (12) // Al (9) / PET (12) // PET with release varnish (12) // PP (30).

<Evaluation of barrier properties>
<Example 1>
10 cm × 10 cm of the laminate of Example 1 in which the outer layer is not half-cut (half-cut penetrating the outer layer) and the inner layer is half-cut (half-cut penetrating the inner layer) with respect to the laminate 1 Prepared.

  The laminate of Example 1 was sealed with a fragrance inside, and sealed in four directions with a seal width of 5 mm to produce a bag. In the same manner, the laminated body of Example 1 was filled with silica gel as a hygroscopic agent and sealed in four directions with a seal width of 5 mm to produce a bag.

<Comparative example 1>
Lamination of Comparative Example 1 in the same manner as in Example 1 except that both the outer layer and inner layer of the laminate 1 were provided with half cuts (half cut reaching the peeling surface from the outer layer and half cut reaching the peeling surface from the inner layer). The body was prepared and the bag body which put the fragrance | flavor inside was produced, and the bag body which put the hygroscopic agent inside.

<Reference Example 1>
A laminated body of Reference Example 1 was prepared in the same manner as in Example 1 except that both the outer layer and the inner layer of the laminated body 1 were not half-cut, and a bag body containing a fragrance inside and a moisture absorbent inside. A bag containing the agent was prepared.

<Example 2>
Except having used the laminated body 2, it carried out similarly to Example 1, and prepared the laminated body of Example 2, and produced the bag body which put the fragrance | flavor inside, and the bag body which put the hygroscopic agent inside.

<Comparative example 2>
Lamination of Comparative Example 2 in the same manner as in Example 2 except that both the outer layer and inner layer of the laminate 2 were provided with half cuts (a half cut reaching the peeling surface from the outer layer and a half cut reaching the peeling surface from the inner layer). The body was prepared and the bag body which put the fragrance | flavor inside was produced, and the bag body which put the hygroscopic agent inside.

<Reference Example 2>
A laminated body of Reference Example 2 was prepared in the same manner as in Example 2 except that both the outer layer and the inner layer of the laminated body 2 were not half-cut, and a bag body in which an fragrance was placed, and moisture absorption inside. A bag containing the agent was prepared.

  The weights of the bags of Examples 1 and 2, Comparative Examples 1 and 2, and Reference Examples 1 and 2 were first measured, and these bags were left in an environment of a temperature of 40 ° C./90% relative humidity. The change in their weight over time was observed.

  The results are shown in FIGS. FIG. 7 shows the weight change of the fragrances of Example 1, Comparative Example 1 and Reference Example 1 using the laminate 1; FIG. 8 shows Example 1, Comparative Example 1, and Example 1 using the laminate 1; The weight change of the hygroscopic agent of Reference Example 1 is shown. Moreover, FIG. 9 shows the weight change of the fragrance | flavor of Example 2, the comparative example 2, and the reference example 2 using the laminated body 2; FIG. 10 shows the Example 2 and the comparative example 2 using the laminated body 2. FIG. And the weight change of the hygroscopic agent of the reference example 2 is shown.

  Referring to FIGS. 7 and 9, it can be seen that the bags of Comparative Examples 1 and 2 are reduced in weight. This is thought to be due to the gradual loss of the internal fragrance due to the low barrier properties of the bags formed of the laminates of Comparative Examples 1 and 2. On the other hand, in Example 1 and Example 2, it is the weight change equivalent to Reference Example 1 and Reference Example 2 which does not have a half cut at all, and the bag body comprised by the laminated body of Example 1 and Example 2 It can be seen that has a high barrier property. In FIG. 7, the reason why the weight of Example 1 and Reference Example 1 increased over the elapsed period is considered to be because the nylon of these laminates absorbs moisture.

  Referring to FIGS. 8 and 10, it can be seen that the change in weight of the bag body of Example 1 and Example 2 is smaller than that of the bag body of Comparative Example 1 and Comparative Example 2. This is presumably because the inner silica gel does not absorb moisture because of the high barrier properties of the bag formed of the laminates of Example 1 and Example 2.

DESCRIPTION OF SYMBOLS 1 Peeling part 1a Half cut 1 'Main body part 2 Tab 3 Opening part 3' Planned opening part 4 Peripheral seal part 4 'Upper seal part 5 Peeling trigger part 5a Peeling part demarcation inner layer half cut 6 Peeling guide part 7 Tear guide part 10 Laminated body for partial opening 20 container 30 counter film 40 lid material A outer layer B inner layer 100 container with lid 200 bag body

Claims (8)

A laminate for partial opening having an outer layer and an inner layer,
The outer layer has a peeling portion that can be peeled off from the inner layer, and a main body portion,
The outer layer includes an outer base film, a barrier film, and an inner base film on the inner layer side in this order,
The outer base film has a notch so as to have a linear cut property, whereby the separation region between the peeling portion and the main body portion of the outer layer is easily cut,
The inner layer has an opening planned portion that becomes an opening when the peeling portion is peeled off,
Laminated body for partial opening.   The laminate for partial opening according to claim 1, wherein the outer layer is peelable from the inner layer in substantially all regions and is easily cut.   The laminated body for partial opening according to claim 1 or 2, wherein the easily cut separation region has a straight cut property.   The said outer layer is a laminated body for partial opening as described in any one of Claims 1-3 containing a stretched film. The laminate for partial opening according to any one of claims 1 to 4 , further comprising a peeling trigger part for starting peeling of the peeling part. The laminated body for partial opening according to any one of claims 1 to 5 , further comprising a peeling guide part for peeling the peeling part in a specific direction. The container for partial opening containing the lid | cover material and container which are the laminated bodies for partial opening as described in any one of Claims 1-6 . At least a portion is formed, partial opening bag body portion opening for laminate according to any one of claims 1-6.

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