WO2021124742A1 - Resealable lid member - Google Patents

Abstract

This resealable lid member 100 has a base material layer 102, an adhesive layer 104, and a heat seal layer 106, in that order, wherein the adhesive layer 104 contains thermoplastic elastomers and polyterpene, the heat seal layer 106 contains a polyolefin resin, and the thickness of the heat seal layer 106 is 1-7μm.

Description

Resealable lid material

The present invention relates to a resealable lid material.

As a packaging means for cosmetics and sanitary products that are repeatedly opened and resealed each time they are used, or for foods and pharmaceuticals that cannot be consumed at one time, the contents remaining after opening are conventionally oxidatively deteriorated or absorb moisture. Various packages having a resealing function are used to prevent deterioration due to drying or the like. As such a packaging body, a multilayer film capable of imparting a resealing function to the packaging body itself without attaching an accessory such as a zipper has been proposed.

In Patent Document 1, a surface resin layer (A) composed of two or more layers and a given styrene-based thermoplastic elastomer (b) as main components are contained, but a pressure-sensitive resin layer (B) does not contain a pressure-imparting resin. ) And the heat-sealed resin layer (C) containing the olefin resin (c) as a main component are laminated in the order of (A) / (B) / (C), and the surface resin layer (A) A multilayer film containing an ester resin as a main component in a layer adjacent to the adhesive resin layer (B) and having a total thickness of 1 μm or more and 30 μm or less of the adhesive resin layer (B) and the heat-sealed resin layer (C). The heat-sealed resin layer (C) is heat-sealed at the heat-sealed portion of the body to be sealed, and then the multilayer film is peeled off from the heat-sealed portion. A multilayer film with a resealing function is disclosed, wherein the layer (A) is delaminated and the adhesive resin layer (B) is exposed to the surface resin layer (A) in a resealable state.

Japanese Patent No. 4749119

When the multilayer film of Patent Document 1 was used as a lid material, the resealability under a normal environment was good. However, when a content that exposes the adhesive layer to a high temperature and high humidity environment is used, the same resealability as in a normal environment may not be obtained.

Further, in solving such a problem, it is desirable that the heat-sealing layer and the adhesive layer can be stably broken in the region where the lid material is heat-sealed, and the adhesive layer in the portion corresponding to this region can be exposed.

Therefore, there is a need to provide a resealable lid material having good breakability and resealability even after the peeled surface is exposed to water vapor.

As a result of diligent studies, the present inventors have found that the above problems can be solved by the following means, and have completed the present invention. That is, the present invention is as follows:
<Aspect 1> A base material layer, an adhesive layer, and a heat seal layer are provided in this order.
The adhesive layer contains a thermoplastic elastomer and a polyterpen, and the adhesive layer contains a thermoplastic elastomer and a polyterpen.
The heat seal layer contains a polyolefin resin, and the thickness of the heat seal layer is 1 to 7 μm.
Resealable lid material.
<Aspect 2> The resealing lid material according to Aspect 1, wherein the base material layer includes a base material resin layer, and the base material resin layer is in direct contact with the adhesive layer.
<Aspect 3> The resealing lid material according to Aspect 1 or 2, wherein the thermoplastic elastomer is a styrene-based thermoplastic elastomer.
<Aspect 4> The resealing lid material according to any one of aspects 1 to 3, wherein the styrene-based thermoplastic elastomer is a styrene-butadiene-butylene-styrene copolymer.
<Aspect 5> The resealable lid material according to any one of aspects 1 to 4, wherein the pressure-sensitive adhesive layer has a thickness of 7 μm or less.
<Aspect 6> A lid material forming laminate having a resealable lid material according to any one of a plurality of aspects 1 to 5 and a surplus portion between the plurality of the resealable lid materials.
<Aspect 7> A container having a storage portion and a flange portion,
The resealable lid material according to any one of aspects 1 to 5, wherein the contents contained in the container and the flange portion of the container are heat-sealed to seal the container. A container with a lid containing the contents.

According to the present invention, it is possible to provide a resealable lid material having good breakability and resealability even after the peeled surface is exposed to water vapor.

FIG. 1 is a schematic view of an embodiment of a resealable lid material and a container with a lid of the present invention. FIG. 1A shows a top view of the container with a lid, and FIG. 1B shows a cross-sectional view taken along the line Ib-Ib of FIG. 1A. FIG. 2 is a diagram showing a peeling mechanism of one embodiment of the resealable lid material of the present invention. FIG. 3 is a diagram showing a laminate for forming a lid material of the present invention.

《Resealable lid material》
As shown in FIG. 1, the resealable lid material 100 of the present invention is
The base material layer 102, the adhesive layer 104, and the heat seal layer 106 are provided in this order.
The adhesive layer 104 contains a thermoplastic elastomer and a polyterpen.
The heat seal layer 106 contains a polyolefin resin, and the thickness of the heat seal layer 106 is 1 to 7 μm.

According to the above configuration, the resealable lid material of the present invention has a depth less than the thickness of the resealable lid material from the half cut line, that is, the surface of the resealable lid material, particularly the surface on the heat seal layer side. It can be broken satisfactorily without providing a notch formed in the lid, particularly along a region intended to be heat-sealed with the container, that is, a region serving as a flange seal portion.

More specifically, when the tab 110 of the resealable lid material 100 joined to the flange portion 202 of the container 200 is picked up by the flange seal portion 202a and the resealable lid material 100 is pulled up, FIG. As shown, the heat seal layer 106 and the adhesive layer 104 are broken at a position corresponding to the outer periphery of the flange seal portion 202a, and the broken portion 120a corresponding to this position is exposed. When the resealing lid material 100 is further pulled up, the lid material is peeled off at the interface between the base material layer 102 and the adhesive layer 104, and subsequently, when the position corresponding to the inner circumference of the flange seal portion 202a is reached, heat is generated. The seal layer 106 and the adhesive layer 104 are broken, and the broken portion 120b corresponding to this position is exposed.

In this way, the resealing portion 104a, which is a part of the adhesive layer 104, is exposed, and when the base material layer 102 is pressed against the resealing portion 104a, the resealing portion 104a can be resealed.

According to the above configuration, good resealing property can be brought about even after the resealing portion 104a is exposed to a high temperature and high humidity environment.

Hereinafter, each component of the present invention will be described.

<Base layer>
The base material layer may be a layer including a base material resin layer. Specifically, the base material layer may be a single base material resin layer, or may be a laminate including the base material resin layer. In any aspect, it is preferable that the base resin layer is in direct contact with the adhesive layer from the viewpoint of adhesiveness. Here, in the present specification, "direct contact" means that they are in contact without passing through another layer, for example, an adhesive layer or the like.

When the base material layer is a laminate including the base material resin layer, the base material layer may have a barrier layer, a paper layer, another resin layer, an adhesive layer, and the like in addition to the base material resin layer. The base material layer of this embodiment may have, for example, a paper layer, an adhesive layer, a barrier layer, an adhesive layer, and a base material resin layer in this order, or another resin layer, an adhesive layer, a barrier layer, and adhesion. The layer and the base resin layer may be provided in this order.

(Base resin layer)
As the base resin layer, for example, a thermoplastic resin such as a polyolefin resin, a vinyl polymer, a polyester, or a polyamide can be used alone or in combination of two or more in a plurality of layers. Such a thermoplastic resin can be used in the form of a film or an extruded resin. Further, the film may be a stretched film or a non-stretched film.

Above all, it is preferable to use a polyester resin as the base resin layer from the viewpoint of harmonizing the delamination property and the adhesiveness between the base resin layer and the adhesive layer.

As the polyolefin-based resin, for example, polyethylene-based resin, polypropylene-based resin, and derivatives thereof can be used.

In the present specification, the polyethylene-based resin is a resin containing a repeating unit of an ethylene group in the main chain of a polymer in an amount of more than 50 mol%, 60 mol% or more, 70 mol% or more, or 80 mol% or more, for example, low density. Co-polyethylene (LDPE), high density polyethylene (HDPE), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-ethylacrylate copolymer (EEA), ethylene-methylacrylate It is selected from the group consisting of polymers (EMA) and mixtures thereof.

In the present specification, the polypropylene-based resin is a resin containing a repeating unit of a propylene group in the main chain of a polymer in an amount of more than 50 mol%, 60 mol% or more, 70 mol% or more, or 80 mol% or more, for example, polypropylene (PP). Examples include homopolymers, random polypropylene (random PP), block polypropylene (block PP), chlorinated polypropylene, acid-modified polypropylene, and mixtures thereof.

As the above derivative, for example, the above-mentioned polyethylene-based resin or an acid-modified polyolefin-based resin in which an acid such as maleic acid is graft-polymerized on the side chain of the polypropylene-based resin can be used.

Examples of the vinyl polymer include polyvinyl chloride (PVC) and the like.

Examples of polyester include polyethylene terephthalate (PET) and polybutylene terephthalate.

Examples of the polyamide include nylon such as nylon (registered trademark) 6 and nylon MXD6.

Further, the resin layer may include other layers such as an inorganic vapor-deposited layer, a barrier coat layer, and an adhesive layer. As the inorganic material vapor deposition layer, a silica vapor deposition film, an aluminum vapor deposition film, an alumina vapor deposition film, or a silica / alumina vapor deposition film can be used. As the barrier coat layer, a vinylidene chloride coat layer and a polyvinylidene fluoride coat layer can be used.

(Barrier layer)
As the barrier layer, for example, an inorganic vapor-deposited layer, a metal foil layer, an organic coat layer, or the like can be used.

As the inorganic material vapor deposition layer, for example, a silica vapor deposition film, an aluminum vapor deposition film, an alumina vapor deposition film, or a silica / alumina vapor deposition film can be used.

As the metal foil layer, for example, a metal foil such as aluminum foil, copper foil, or titanium foil, or an alloy foil such as aluminum alloy foil or stainless steel foil can be used.

As the organic coating layer, for example, a vinylidene chloride coat layer or a polyvinylidene fluoride coat layer can be used.

When an inorganic vapor-deposited film or an organic coat layer is used as the barrier layer, the thickness of the barrier layer must be 100 nm or more, 200 nm or more, 300 nm or more, 500 nm or more, 700 nm or more, or 1 μm or more to ensure strength and barrier properties. It is preferable from the viewpoint of improving the handleability as a lid material, and it is preferable that the thickness is 5 μm or less, 4 μm or less, 3 μm or less, or 2 μm or less.

When a metal foil layer is used as the barrier layer, the thickness of the barrier layer is preferably 3 μm or more, 5 μm or more, 7 μm or more, 10 μm or more, or 15 μm or more, preferably from the viewpoint of ensuring strength and barrier properties, and 100 μm. Hereinafter, it is preferable that the thickness is 80 μm or less, 60 μm or less, 55 μm or less, 50 μm or less, 45 μm or less, 40 μm or less, or 35 μm or less from the viewpoint of improving the handleability as a lid material.

(Paper layer)
The paper layer may be, for example, a layer facing the outside of the lid material. As the paper layer, coated paper, art paper, or the like may be used. Further, the paper layer may be printed by gravure printing, flexographic printing, or the like.

(Other resin layer)
The other resin layer may be, for example, a resin layer facing the outside of the lid material. As such a resin layer, the resins mentioned for the base resin layer can be used.

(Adhesive layer)
The adhesive layer is an optional adhesive layer that can exist between the above layers constituting the base material layer. The adhesive layer may be, for example, a dry laminate adhesive, a hot melt adhesive, a water-soluble adhesive, an emulsion adhesive, a non-solvent laminate adhesive, a thermoplastic resin for extrusion lamination, or the like.

<Adhesive layer>
The adhesive layer contains a thermoplastic elastomer and a polyterpene. According to this adhesive layer, the adhesive layer can provide good resealability even after the peeled surface is exposed to water vapor.

The content of the thermoplastic elastomer in the adhesive layer may be 30% by mass or more, 35% by mass or more, 40% by mass or more, or 45% by mass or more, and 70% by mass or less, based on the total mass of the adhesive layer. , 65% by mass or less, 60% by mass or less, or 55% by mass or less.

The content of polyterpen in the adhesive layer may be 30% by mass or more, 35% by mass or more, 40% by mass or more, or 45% by mass or more, and 70% by mass or less, 65% by mass, based on the total mass of the adhesive layer. It may be mass% or less, 60 mass% or less, or 55 mass% or less.

The thickness of the adhesive layer is preferably 7 μm or less, 6 μm or less, or 5 μm or less from the viewpoint of obtaining good breakability, and 1 μm or more, 2 μm or more, or 3 μm or more is sufficient for resealing. It is preferable from the viewpoint of obtaining sex.

The adhesive layer can be obtained, for example, by applying a composition obtained by mixing a thermoplastic elastomer and a polyterpen to the base resin layer of the base layer by a coating means. As the coating means, for example, coating with a dry laminator, gravure printing, offset printing, flexographic printing, silk printing and the like can be used.

(Thermoplastic elastomer)
In general, a thermoplastic elastomer is a material that can be fluidized and molded at a high temperature and exhibits rubber elasticity at room temperature. As the thermoplastic elastomer, for example, an olefin-based thermoplastic elastomer, a styrene-based thermoplastic elastomer, or the like can be used.

Examples of the olefin-based thermoplastic elastomer include ethylene-propylene copolymer (EPM), ethylene-butene copolymer (EBM), ethylene-octene copolymer, ethylene-propylene-butene copolymer, and propylene-butene copolymer. Combined, ethylene-propylene-diene copolymer (EPDM) and the like can be mentioned. Further, a blend type olefin-based thermoplastic elastomer in which an olefin-based rubber (EPM, EPDM, etc.) is dispersed in a matrix of an olefin-based resin (for example, polypropylene, polyethylene, etc.) can also be mentioned.

Examples of the styrene-based thermoplastic elastomer include styrene-ethylene-butene copolymer (SEB), styrene-ethylene-propylene copolymer (SEP), styrene-ethylene-butene-styrene copolymer (SEBS), and styrene-ethylene. -Propine-styrene copolymer (SEPS), styrene-ethylene-ethylene-propylene-styrene copolymer (SEEPS), styrene-butadiene-butylene-styrene copolymer (partially hydrogenated styrene-butadiene-styrene copolymer; SBBS), partially hydrogenated styrene-isoprene-styrene copolymer, partially hydrogenated styrene-isoprene butadiene-styrene copolymer and the like can be mentioned.

(Polyterpen)
Polyterpene means an organic compound having isoprene as a basic skeleton in its molecular structure. As the polyterpen, a commercially available polyterpen as a "polyterpen" can be used, for example, Sylvares TRA25, TRB115, TR1115T, TR7115, TRM1115, TR7125, TRB125 of Clayton (registered trademark). The same TR1135, the same TR90, the same TR105 and the like can be used.

<Heat seal layer>
The heat seal layer is a layer containing a polyolefin resin and having a thickness of 1 to 7 μm. According to such a configuration, it is possible to have both ease of breaking and heat-sealing property.

The thickness of the heat seal layer may be 1 μm or more, 2 μm or more, or 3 μm or more. This thickness is preferably 7 μm or less, 6 μm or less, or 5 μm or less from the viewpoint of both ease of breaking and heat sealability.

The heat seal layer can be obtained, for example, by applying a polyolefin resin to the adhesive layer by printing means. As the printing means, for example, gravure printing, offset printing, flexographic printing, silk printing and the like can be used.

(Polyolefin resin)
As the polyolefin-based resin, the polyolefin-based resin mentioned for the base resin layer can be used. Above all, it is preferable to use an acid-modified polyolefin resin from the viewpoint of combining the coatability of the heat seal layer, the ease of breaking, and the heat seal property.

<< Laminated body for forming lid material >>
The lid material forming laminate of the present invention has a plurality of the above-mentioned resealable lid materials and a surplus portion between the plurality of resealable lid materials. This surplus portion is made of the same laminated body as the laminated body constituting the resealable lid material.

The lid material forming laminate can be, for example, a roll-shaped or sheet-shaped laminate having a plurality of the above-mentioned lid materials. The layer structure of this laminated body can be the layer structure described with respect to the lid material described above.

The lid material of the present invention can be produced by cutting or punching the laminate for forming the lid material into the shape of the lid material.

《Container with lid containing contents》
The container with a lid containing the contents of the present invention
Containers with storage and flanges,
It comprises the contents contained in the container, as well as the resealable lid material described above, which is heat-sealed at the flange of the container and thereby seals the container.

<container>
The container is a container having a storage portion and a flange portion.

The container is not particularly limited as long as the lid material can be heat-sealed. As the container, for example, a paper container whose surface is coated with resin, a resin container, or the like can be used.

(Storage part)
The storage part is a part where the contents are stored. The shape of this portion can be, for example, a substantially conical trapezium, a polygonal pyramid trapezium, a rectangular parallelepiped shape, a cube shape, or the like.

(Flange part)
The flange portion is a peripheral portion of the storage portion of the container, and may be a flange-shaped portion. The shape of the outer circumference of the flange portion can be selected according to the shape of the lid material.

<Contents>
The contents are the contents housed in the storage unit. Examples of such contents include heated foods such as soups, instant noodles, chilled foods and frozen foods, and non-heated foods such as snack foods and gummy candies. In particular, when a heated food is used as the content, steam is generated through heating, so that the application of the present invention is particularly beneficial.

The present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

<Example 1>
We prepared the materials shown below:
Paper (basis weight: 79.1 g / m ² ): NM Art, Nippon Paper Industries, Ltd. Aluminum foil (7 μm): 1N30, UACJ Co., Ltd. Foil Dry Laminate Adhesive: Takelac A-525 / Takenate A-52, Mitsui Chemicals PET Co., Ltd. (Thickness: 12 μm): PETB, Unitika Co., Ltd. Adhesive layer: SBBS (N515, Asahi Kasei Co., Ltd.) 50% by mass and Polyterpen (Sylvares TRB115, Clayton) 50% by mass mixed resin Heat seal layer: Acid modification Polyethylene (E-200TE, Mitsui Chemicals, Inc.)

The lid material obtained in this example has a layer structure of paper (basis weight: 79.1 g / m ² ) // aluminum foil (7 μm) // PET (12 μm) / adhesive layer / heat seal layer (however, “/”. / ”Represented a dry laminate adhesive).

1. Using a dry laminator, aluminum foil "1N30" as a barrier layer and PET film "PETB" as a base resin layer are passed through a dry laminate adhesive "Takelac A-525 / Takenate A-52" as an adhesive layer. And adhered to obtain a member a (aluminum foil (7 μm) // PET (12 μm)) as a base material layer.

2. Using a dry laminator, the aluminum foil side of the member a and the paper "NM Art" as a paper layer are bonded via the dry laminate adhesive "Takelac A-525 / Takenate A-52" as an adhesive layer. A member b (paper (basis weight: 79.1 g / m ² ) // aluminum foil (7 μm) // PET (12 μm)) as a base material layer was obtained.

3. 3. The above mixed resin as an adhesive layer is applied to the PET film "PETB" side of the member b so that the thickness of the adhesive layer is 4 μm, and the member c (paper (basis weight: 79.1 g / m)). ² ) // Aluminum foil (7 μm) // PET (12 μm) / Adhesive layer) was prepared.

4. The adhesive layer of the member c is coated with an acid-modified polyolefin as a heat seal layer so as to have a thickness of 3 μm, and the member d as a laminate constituting the lid material (paper (basis weight: 79.1 g)). / M ² ) // Aluminum foil (7 μm) // PET (12 μm) / Adhesive layer / Heat seal layer) was obtained.

5. The member d was cut out in a diamond shape to prepare the lid material of the example.

6. The prepared lid material was heat-sealed in a PE-coated paper cup (flange width: 3 mm, opening inner diameter: 90 mm) using a heated heat-seal bar under the conditions of a heat-seal width of 3 mm, a pressure of 65 Mpa, and a time of 0.7 seconds. It was a container with a lid.

Further, in order to evaluate the initial interlayer strength and the resealing peeling strength mentioned below, the above member d was cut into a rectangle having a width of 15 mm × 150 mm, and this was used as an evaluation laminate.

<Comparative example 1>
4. above. In the same manner as in Example 1 except that the following was changed, a lid material and a container with a lid of Comparative Example 1 were obtained:
A polyethylene film (thickness 15 μm) as a heat seal layer is directly laminated on the adhesive layer of the member c, and the member d1 as a laminate constituting the lid material (paper (basis weight: 79.1 g / m ² )). // Aluminum foil (7 μm) // PET (12 μm) / Adhesive layer / Heat seal layer) was obtained.

<Comparative example 2>
As the heat seal layer, a mixed resin of 90% by mass of HDPE (Novatec (registered trademark) HD HJ490, Japan Polyethylene Corporation) and 10% by mass of LDPE (Suntech (registered trademark) LD L2340, Asahi Kasei Co., Ltd.) having a thickness of 10 μm was used. A lid material and a container with a lid of Comparative Example 2 were obtained in the same manner as in Comparative Example 1 except that SBBS (N515, Asahi Kasei Co., Ltd.) was used as the adhesive layer instead of the mixed resin.

<Comparative example 3>
A lid material and a container with a lid of Comparative Example 3 were obtained in the same manner as in Comparative Example 2 except that the adhesive layer was repeatedly applied twice so as to have a thickness of 10 μm.

《Evaluation》
<Initial interlayer strength>
The above evaluation laminate was heat-sealed on a polyethylene film under the conditions of a temperature of 150 ° C., a pressure of 3 kgf / cm ^{2, and a time of 1.5 seconds.} Next, the peeling length of the part corresponding to the heat-sealed part when 180 ° was peeled off under the conditions of 300 mm / min and a peeling length of 35 mm using a measuring machine (Strograph VES1D, Toyo Seiki Seisakusho Co., Ltd.). By calculating the average peel strength at 10 to 30 mm, the initial interlayer strength between the base material layer and the adhesive layer was calculated.

<Reseal peeling strength in a 50 ° C environment>
With respect to the sample for which the initial interlayer strength was calculated, the base material layer and the adhesive layer were overlapped and reciprocated once with a 2 kg roller to apply a load in the thickness direction of the evaluation laminate to make the base material layer an adhesive layer. When the adhesive layer was peeled from the base material layer from the short side to the long side by 180 ° under the conditions of 300 mm / min and a peeling length of 35 mm in an environment of a temperature of 50 ° C. The resealing peeling strength was determined by calculating the average peeling strength at a peeling length of 10 to 30 mm.

<Resealability after hot water supply>
The prepared container with a lid was opened until 1/3 of the flange of the container was exposed, and boiling water at 90 ° C. was poured into the container. Next, the base material layer and the adhesive layer were overlapped and resealed by pressing with a finger. The measurement was performed for 5 minutes from the time of resealing, and it was visually observed whether or not the lid material was opened during that period.

The evaluation criteria are as follows:
〇: The lid material did not open for 5 minutes from the time of resealing.
X: The lid material was opened within 5 minutes from the time of resealing.

<Breakability>
The prepared container with a lid was opened, and it was visually observed whether or not the heat seal layer and the adhesive layer were broken at the positions corresponding to the flange seal portion after opening.

The evaluation criteria are as follows:
〇: The heat seal layer and the adhesive layer were broken at the positions corresponding to the flange seal portion.
X: At the position corresponding to the flange seal portion, the heat seal layer and the adhesive layer were not stably broken, and a part of the layer remained beyond this position.

<Printing and coating at once>
It was evaluated whether the adhesive layer and the heat seal layer could be manufactured by one printing coating.

The evaluation criteria are as follows:
〇: The adhesive layer and the heat seal layer can be manufactured by one printing coating.
X: The adhesive layer and the heat seal layer cannot be manufactured by one printing coating.

Table 1 shows the configurations and evaluation results of Examples and Comparative Examples.

From Table 1, it can be understood that the lid material of the example had good initial interlayer strength, resealing peeling strength in an environment of 50 ° C., resealing property after hot water supply, and breakability.

On the other hand, the lid materials of Comparative Examples 2 and 3 in which the adhesive layer did not contain polyterpen had good breakability, but had initial interlayer strength, resealing strength in an environment of 50 ° C., and after hot water supply. The resealing property was not good. Further, since these lid materials used a heat seal layer having a thickness of 10 μm, the adhesive layer and the heat seal layer could not be manufactured by one printing coating.

Further, the lid material of Comparative Example 1 in which a polyethylene film was used as the heat seal layer did not have good breakability. Further, since this lid material used a heat seal layer having a thickness of 15 μm, the adhesive layer and the heat seal layer could not be manufactured by one printing coating.

100 Resealable lid material 102 Base material layer 104 Adhesive layer 104a Reseal part 106 Heat seal layer 110 Tab 120a, 120b Break part 200 Container 202 Flange part 202a Flange seal part 250 Contents 300 Container with lid with contents 400 Surplus part 500 Laminated material for forming lid material

Claims (7)

It has a base material layer, an adhesive layer and a heat seal layer in this order.
The adhesive layer contains a thermoplastic elastomer and a polyterpen, and the adhesive layer contains a thermoplastic elastomer and a polyterpen.
The heat seal layer contains a polyolefin resin, and the thickness of the heat seal layer is 1 to 7 μm.
Resealable lid material. The resealing lid material according to claim 1, wherein the base material layer includes a base material resin layer, and the base material resin layer is in direct contact with the adhesive layer. The resealable lid material according to claim 1 or 2, wherein the thermoplastic elastomer is a styrene-based thermoplastic elastomer. The resealing lid material according to any one of claims 1 to 3, wherein the styrene-based thermoplastic elastomer is a styrene-butadiene-butylene-styrene copolymer. The resealable lid material according to any one of claims 1 to 4, wherein the thickness of the adhesive layer is 7 μm or less. A laminate for forming a lid material, which has the resealable lid material according to any one of claims 1 to 5 and a surplus portion between the plurality of the resealable lid materials. Containers with storage and flanges,
The resealable lid according to any one of claims 1 to 5, wherein the contents contained in the container and the flange portion of the container are heat-sealed to seal the container. A container with a lid containing the contents, which is equipped with materials.

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