JP2015223280A - Re-sealable adhesive film for displaying articles and article display body formed therefrom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a re-sealable adhesive film for displaying articles which is manufactured easily, in a short time and at low cost, in which adhesive layer is surely exposed when an article is peeled off therefrom and a peeled surface has a good appearance, and which has a sufficient sealing strength for holding the article when sticking the article again after peeling off, and to provide an article display body formed therefrom.SOLUTION: A re-sealable adhesive film for displaying articles is composed of a laminate including: a laminated film formed by co-extrusion film forming of at least a heat sealable resin layer, an adhesive layer and a thermoplastic resin layer which are laminated in this order; and a base material film laminated on the thermoplastic resin layer of the laminated film. The heat sealable resin layer is heat-sealed with an adhering target surface of the article, and thereafter, the article is peeled off so that the adhesive layer is exposed at the heat-sealed portion in a re-sealable state.

Description

  The present invention relates to a resealable pressure-sensitive adhesive film for product display and a product display body comprising the same, and more specifically, a product display reseal that can be displayed by hanging the product by bonding the product to the surface. The present invention relates to an adhesive film and a product display body comprising the same.

  As a method of displaying products packaged in a sachet or the like, there is a method of displaying products by placing them on a product display board and hanging them on a wall surface instead of arranging them on a display shelf. According to this method, it is possible to display products without taking up a place and with good appearance.

  In recent years, it has been known that an adhesive film having resealability is used as the product display mount (Patent Document 1). This pressure-sensitive adhesive film has a heat-sealable resin layer on its surface, so that a product can be attached by heat-sealing. Also, by having an adhesive layer under the heat-sealable resin layer, when the product attached by heat-seal is peeled off, the heat-sealable resin layer on the surface is peeled off together with the product, and the adhesive layer is the inner layer Is exposed on the surface and exhibits resealability, and the peeled product can be pasted again.

  However, such an adhesive film for product display is difficult to adjust the sealing strength and delamination strength, and when the product is peeled off, the heat-sealable resin layer does not peel off and the adhesive layer is not sufficiently exposed. There was a problem that the adhesive layer was peeled off and the peeled surface looked bad. Further, even if the pressure-sensitive adhesive layer is exposed, there is a problem that sufficient sealing strength cannot be exhibited and the product cannot be pasted again.

  Furthermore, in order for the pressure-sensitive adhesive layer to be exposed reliably, it is necessary to coat a release agent between the pressure-sensitive adhesive layer and the heat-sealable resin layer, but this process takes time and is complicated to manufacture. It was also expensive.

JP 2008-264318 A

  The present invention solves the above problems, is easy to manufacture, does not take time and cost, and when the product is peeled off, the pressure-sensitive adhesive layer is reliably exposed, the release surface is beautiful, The invention provides an adhesive film for product display, and a product display body comprising the same, which shows sufficient sealing strength to hold the product even when it is peeled off and attached again.

  The present inventors have intensively studied to solve the above problems, and at least a laminated film in which a heat-sealable resin layer, an adhesive layer, and a thermoplastic resin layer are laminated in this order by coextrusion film formation, A laminate film having a base film laminated on the thermoplastic resin layer of the laminated film, wherein the heat-sealable resin layer is heat-sealed with a product adhesion surface. Then, the above-mentioned pressure-sensitive adhesive film for product display was developed in which the pressure-sensitive adhesive layer is exposed in a resealable state in the heat-sealed portion by peeling off the product.

More specifically, the present invention is characterized by the following points.
(1) A laminated film in which at least a heat-sealable resin layer, an adhesive layer, and a thermoplastic resin layer are laminated in this order by coextrusion film formation, and a group laminated on the thermoplastic resin layer of the laminated film A re-sealable adhesive film for product display comprising a laminate having a material film, wherein the heat-sealable resin layer is heat-sealed with the adherend surface of the product, and then the product is peeled off to heat In the sealed portion, the pressure-sensitive adhesive layer is exposed in a resealable state. The resealable pressure-sensitive adhesive film for product display described above.
(2) The resealable pressure-sensitive adhesive film for product display according to (1), wherein the pressure-sensitive adhesive layer is a layer made of a hot-melt pressure-sensitive adhesive.
(3) The resealable pressure-sensitive adhesive film for product display according to (2), wherein the hot-melt pressure-sensitive adhesive is made of a styrene copolymer.
(4) The resealable adhesive film for product display according to any one of (1) to (3), wherein the heat-sealable resin layer is a layer made of polypropylene resin.
(5) A product display body in which a product is heat-sealed on the resealable adhesive film for product display described in any one of (1) to (4) above.

  The pressure-sensitive adhesive film for product display according to the present invention forms a laminated film including a heat-sealable resin layer and a pressure-sensitive adhesive layer by coextrusion, so that a complicated manufacturing process is not required and the time and cost required for manufacturing are reduced. Can be reduced. Furthermore, it is not necessary to provide a release agent layer between the heat-sealable resin layer and the pressure-sensitive adhesive layer, and the peel strength between these layers can be stably maintained at a preferable value.

  In addition, since the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer has a high tack at room temperature, there has been a problem that when the resin composition is co-extruded with the heat-sealable resin, the resin extrusion port is blocked. In order to solve this problem, in the present invention, the pressure-sensitive adhesive layer is formed by three-layer coextrusion with the heat-sealable resin layer and the thermoplastic resin layer sandwiched therebetween, so that the pressure-sensitive adhesive is directly applied to the resin extrusion port. Therefore, stable film formation is possible.

It is a schematic sectional drawing which shows an example about the layer structure of the adhesive film for goods display of this invention. It is a schematic sectional drawing which shows the state which peeled off the goods. It is the schematic which shows an example about the goods display body by which the goods were heat-sealed by the adhesive film for goods display of this invention.

The present invention will be described in more detail below.
Hereinafter, the resin names used in the present invention are those commonly used in the industry. In the present invention, the density is a value measured according to JIS-K7112. Furthermore, MFR is a value measured according to JIS-K7210.

<Layer structure of pressure-sensitive adhesive film for product display of the present invention>
FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of the pressure-sensitive adhesive film for product display according to the present invention. As shown in FIG. 1, the pressure-sensitive adhesive film of the present invention includes a laminated film in which a thermoplastic resin layer 2, a pressure-sensitive adhesive layer 3, and a heat-sealable resin layer 4 are laminated in this order by coextrusion film formation, and the laminated film. And a base film 1 laminated on the surface of the thermoplastic resin layer 2 of the film. Here, the base film 1 and the laminated film can be laminated by a dry lamination method or a sandwich lamination method. Or you may laminate | stack the thermoplastic resin layer 2, the adhesive layer 3, and the heat-sealable resin layer 4 on the base film 1 by the coextrusion lamination method.

  FIG. 2 is a schematic cross-sectional view showing a state in which the product is peeled off. As shown in FIG. 2, at least a part of the product 5 is superposed on the surface of the heat-sealable resin layer 4 of the pressure-sensitive adhesive film of the present invention and heat-sealed, thereby sticking the product 5 on the pressure-sensitive adhesive film. Can do. Next, when the product 5 is peeled off from the adhesive film, the heat-sealable resin layer 4 is peeled together with the product 5 in the heat-sealed portion, and the adhesive layer 3 is exposed in this portion. Therefore, the product 5 once peeled off can be re-adhered by pressing it against the portion where the pressure-sensitive adhesive layer 3 is exposed.

  FIG. 3 is a schematic view showing an example of a product display body in which the product 5 is heat-sealed on the product display adhesive film 6 of the present invention. As shown in FIG. 3, the product display pressure-sensitive adhesive film 6 of the present invention may have a strip shape narrower than the width of the product 5, and a plurality of products 5 are lined up and heat-sealed on this to place the product. Products can be displayed nicely without taking care of. Moreover, the pressure-sensitive adhesive film 6 for product display of the present invention may have the same width as the product 5 or a wider shape.

<Base film>
In the present invention, as the base film, various materials can be applied according to the weight of the products to be displayed, the display style, the mechanical strength required in physical distribution, and the like. For example, polyethylene resin, polypropylene resin, cyclic polyolefin resin, fluorine resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyvinyl alcohol, Polyethylene resins such as ethylene / vinyl alcohol copolymer, polyvinyl chloride resin, fluorine resin, poly (meth) acrylic resin, polycarbonate resin, polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene naphthalate, etc. Polyamide resins such as nylon, polyimide resins, polyamideimide resins, polyarylphthalate resins, silicone resins, polysulfone resins, polyphenylene sulfide resins, polyethers Rusuruhon resins, polyurethane resins, acetal resins, a resin film made of a cellulose resin or the like, or various paper substrates, it is possible to use a metal foil or a multilayer film laminated with them, and the like. In particular, it is preferable to use a polyester-based resin film or a polyamide-based resin film from the viewpoint of suitable handling properties and sufficient mechanical strength.
The thickness of the base film can be appropriately determined by those skilled in the art according to the display style and the like, and is, for example, 20 to 100 μm.

<Thermoplastic resin layer>
In the pressure-sensitive adhesive film of the present invention, the thermoplastic resin layer may be made of a conventional thermoplastic resin that has thermoplasticity and is solid at room temperature and does not have tack and adhesion.
Suitable thermoplastic resins include polyolefin resins (polyethylene resins, polypropylene resins, etc.), halogen-containing resins (vinyl chloride resins, etc.), vinyl alcohol resins, (meth) acrylic resins, styrene resins, polyesters. Resin (polyalkylene arylate resin such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, etc.), polyamide resin (polyamide 6, polyamide 66, etc.), polycarbonate resin, polysulfone resin (polyethersulfone, polysulfone, etc.) And polyphenylene ether resins. These may be used alone or as a mixture of two or more resins. Among these, the polyolefin resin is suitable for coextrusion film formation in the present invention, and a suitable interlayer adhesion strength with a pressure-sensitive adhesive layer, particularly a hot-melt pressure-sensitive adhesive made of a styrene copolymer, is obtained. Preferably used.

  The thermoplastic resin described above is used for the purpose of improving and modifying the workability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, strength, etc., when forming the film. Various plastic compounding agents, additives, and the like can be added. The addition amount can be arbitrarily added from a very small amount to several tens of percent, for example, 20% by mass, depending on the purpose.

In the above, as general additives, for example, an anti-blocking agent, a slip agent, a crosslinking agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a filler, a reinforcing agent, an antistatic agent, a pigment and the like are used. be able to.
The thickness of the thermoplastic resin layer may be any thickness that can be formed by coextrusion film formation, and can be appropriately determined by those skilled in the art, and is, for example, 10 to 40 μm.

<Adhesive layer>
In the pressure-sensitive adhesive film of the present invention, the pressure-sensitive adhesive layer has an extrudable heat-melting property, has tack and adhesiveness at room temperature, and can be resealed by pressing a peeled product. It may consist of an agent.

  As such an adhesive, particularly in the present invention, coextrusion film formation by the top blown air-cooled inflation in the present invention is possible, and the number of manufacturing steps and cost can be reduced. Are preferably used.

  As the hot melt adhesive, a composition containing a base polymer made of a thermoplastic resin and a tackifier is used.

  Examples of the base polymer include styrene-butadiene copolymer (SBS), styrene-isoprene copolymer (SIS), styrene-ethylene / butylene copolymer (SEBS), styrene-ethylene / propylene copolymer (SEPS), and styrene-isoprene-butylene copolymer ( SIBS) and other styrene copolymers, acrylic resins, ethylene-vinyl acetate copolymers, copolymers of vinyl aromatics and conjugated dienes and their hydrogenated products, ethylene-α-olefin copolymers, polyester resins Etc. are used alone or in combination. In the case of coextrusion film formation with a heat-sealable resin and a thermoplastic resin, particularly a polyolefin resin, which is preferably used in the present invention, cohesive force tends to be developed, and even if peeled after heat-sealing with an adherend, Hot-melt adhesive that uses a styrene copolymer as a base polymer because it is difficult for adhesive to remain on the adherend, easy to adjust viscosity, good adhesiveness, and easy to plasticize Is particularly preferred.

  As tackifiers, conventional tackifying resins such as coumarone / indene resins, phenol resins, phenol / formaldehyde resins, terpenes / phenol resins, polyterpene resins, xylene / formaldehyde resins, synthetic polyterpene resins, aromatic hydrocarbon resins, Aliphatic cyclic hydrocarbon resin, hydrogenated hydrocarbon resin, hydrocarbon resin, polybutene, rosin, rosin ester, hydrogenated rosin, ester of hydrogenated rosin and monoalcohol or polyhydric alcohol, aliphatic petroleum resin, aroma A group petroleum resin, a copolymer petroleum resin, etc. are mentioned. These may be used alone or in combination of two or more.

  The addition amount of the tackifier can be appropriately set by those skilled in the art depending on the desired tackiness, and may be, for example, about 10 to 150 parts by mass with respect to 100 parts by mass of the base polymer. When there is too much addition amount of a tackifier, the cohesive force of an adhesive layer will fall easily. On the other hand, if the amount is too small, the adhesive force tends to be lowered.

As the pressure-sensitive adhesive, in addition to the tackifier, conventional additives such as plasticizers, viscosity modifiers, antioxidants, fillers, etc., in a very small amount to several tens of percent, are desired. It can be arbitrarily added depending on the cohesive strength, adhesive strength, and the like.

Examples of the styrenic hot-melt pressure-sensitive adhesive suitably used in the present invention include Technomelt PS 7090 manufactured by Henkel Japan Co., Ltd. from the viewpoint of excellent extrudability.
The thickness of the pressure-sensitive adhesive layer can be appropriately determined by those skilled in the art, and is, for example, 10 to 40 μm.

<Heat sealable resin layer>
Since the adhesive film of the present invention has a heat-sealable resin layer on the surface, the product can be attached by heat sealing. When the product is peeled off, cohesive failure of the heat-sealable resin layer occurs, peeling occurs at the interface between the heat-sealable resin layer and the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer is exposed. A slit is made in the vicinity of the heat seal portion with the product on the heat sealable resin layer in advance to promote cohesive failure of the heat seal layer and ensure separation at the interface between the heat sealable resin layer and the adhesive layer. You can also

  In the present invention, the heat-sealable resin constituting the heat-sealable resin layer may be any resin that can be melted by heat and fused to each other. For example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (Linear) low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene Polyolefin resins such as copolymers, methylpentene polymers, polyethylene and polypropylene, or acid-modified polyolefin resins obtained by modifying these resins with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, etc. Alone or in combination of two or more It is possible to have.

  Because it can exhibit high sealing strength, and particularly by co-extrusion film formation with a hot-melt pressure-sensitive adhesive made of a styrene copolymer, it adheres with the pressure-sensitive adhesive layer with a suitable interlayer adhesion strength, In particular, it is preferably made of a polyolefin resin.

  Furthermore, the heat-sealable resin layer needs to have an appropriate cohesive force that is not too high so that the layer structure is destroyed by the force to peel off the product and the pressure-sensitive adhesive layer is surely exposed. Polypropylene resin can be particularly preferably used. In the present invention, since the heat-sealable resin layer is made of polypropylene resin, when the product is peeled off, the heat-sealable resin layer is surely peeled only at the heat-seal portion, and the peeled surface has no stringing. It will be beautiful. Therefore, there is no need to provide a peeling assisting means such as a slit provided on the heat-sealable resin layer for reliable peeling, leading to a significant simplification of the manufacturing process.

  The above heat-sealable resin is used for the purpose of improving and modifying processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, strength, etc., when forming the film. Various plastic compounding agents, additives, and the like can be added, and the addition amount can be arbitrarily added from a very small amount to several tens of percent, for example, 20% by mass, depending on the purpose. .

In the above, as general additives, for example, an anti-blocking agent, a slip agent, a crosslinking agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a filler, a reinforcing agent, an antistatic agent, a pigment and the like are used. be able to.
The thickness of the heat-sealable resin layer can be appropriately determined by those skilled in the art, and is, for example, 5 to 30 μm.

<Adhesive film>
In the production of the pressure-sensitive adhesive film of the present invention, the thermoplastic resin layer, the pressure-sensitive adhesive layer, and the heat-sealable resin layer are formed as a laminated film by three-layer coextrusion. For film formation, a T-die coextrusion machine or a coextrusion inflation film production machine is used.

  Here, the thermoplastic resin layer and the heat-sealable resin layer are extruded with the pressure-sensitive adhesive layer sandwiched therebetween, whereby blocking at the resin extrusion port of the film forming machine (blocking of the supply port) can be prevented. Moreover, the film after film formation is easy to handle, and can be wound and stored as it is, or can be laminated with a substrate film via an adhesive layer as necessary.

Alternatively, three layers may be laminated on the base film by coextrusion coating directly or via an anchor coating agent layer or the like.
By forming a film by three-layer coextrusion, the degree of freedom in adjusting the interlaminar adhesive strength is higher than in the case of a method such as coating, and the labor and cost of production can be reduced.

  In the pressure-sensitive adhesive film of the present invention having the above-described structure, the interlayer adhesive strength between the pressure-sensitive adhesive layer and the heat-sealable resin layer is smaller than the force required for cohesive failure of the pressure-sensitive adhesive layer (cohesive failure strength), and heat sealing Greater than the cohesive failure strength of the conductive resin layer.

  Moreover, those skilled in the art can appropriately set the sealing strength between the product and the heat-sealable resin layer according to the weight of the product to be attached. As an example, when the weight of the product is about 30 g, the heat seal area is 5 to 50 mm in length, and the width is 15 mm to the width of the product, the seal strength between the product and the heat-sealable resin layer is, for example, 8 It may be ~ 30N / 35mm width. This is greater than the cohesive failure strength of the heat-sealable resin layer and the interlayer adhesion strength between the pressure-sensitive adhesive layer and the heat-sealable resin layer. The reseal strength is, for example, about 1 to 10 N / 35 mm width.

  The interlayer adhesion strength and the cohesive fracture strength of each layer can be adjusted by selecting the type of resin constituting each layer, the combination with the adjacent resin, the layer thickness, and the like. As a combination of such resins, for example, as a resin composition constituting the pressure-sensitive adhesive layer, a hot-melt pressure-sensitive adhesive having a styrene copolymer as a base polymer is used, and a resin constituting the heat-sealable resin layer is used. By using a polyolefin resin, particularly polypropylene resin, co-extrusion film formation with a pressure-sensitive adhesive layer thickness of 10 μm or more and a heat-sealable resin layer thickness of 5-30 μm, particularly suitable cohesive failure strength and Interlayer adhesion strength is obtained.

In addition to the above, it is well known to those skilled in the art to adjust the cohesive fracture strength and interlayer adhesion strength of each layer depending on the type and amount of additives such as tackifiers.
The pressure-sensitive adhesive film of the present invention is, for example, a sachet or a sheet, and a sachet package containing various products such as confectionery, seasoning, and instant food on the surface of the heat-sealable resin layer. Can be heat-sealed to make a product exhibit. A hole or the like for hanging the product display body on a wall or the like may be provided in the upper part of the product display body.

  The package of the product to be heat-sealed is composed of the above heat-sealable resin layer and a conventional heat-sealable packaging material, for example, a polyester-based resin film, a polyamide-based resin film, a polypropylene-based resin film, and a vapor-deposited film thereon. It may be composed of a deposited film, a metal foil, a paper base, or a multilayer film obtained by laminating these.

Hereinafter, the present invention will be described in more detail with reference to examples.
<Example 1>
(Thermoplastic resin) Linear low-density polyethylene polymerized using a metallocene catalyst (Prime Polymer Co., Ltd. [Evolue SP2020]: density = 0.916 g / cm ³ , MFR = 2.3 g / 10 min) 80 Mass parts and slip agent (erucic acid amide 1.5% by mass) -antiblocking agent (natural silica 10% by mass) master batch (Ube Maruzen Polyethylene Co., Ltd. [UM-82105M]: binder: low density polyethylene) 20 The resin composition was prepared by sufficiently kneading the mass part.

(Adhesive) A hot-melt adhesive using a styrene copolymer as a base polymer (manufactured by Henkel Japan Co., Ltd. [Technomelt PS 7090]: density = about 1.0 g / cm ³ , MFR = 37 g / 10 minutes) Using.

(Heat-sealable resin) 80 parts by mass of polypropylene polymerized using a metallocene catalyst (Nippon Polypro Corp. [RFG4VM]: density = 0.890 g / cm ³ , MFR = 6.0 g / 10 min), slip A resin composition was prepared by sufficiently kneading 20 parts by mass of an agent-antiblocking agent masterbatch (manufactured by Ube Maruzen Polyethylene Co., Ltd. [UM-82105M]).

  Using the above resin composition and pressure-sensitive adhesive, top blowing air-cooled inflation co-extrusion film forming machine at a thermoplastic resin and heat-sealable resin extrusion temperature of 180 ° C., a pressure-sensitive adhesive extrusion temperature of 160 ° C., and a die temperature of 170 ° C. Thus, a three-layer co-pressed laminated film having a layer constitution of thermoplastic resin layer 35 μm / adhesive layer 10 μm / heat-sealable resin layer 10 μm was formed.

The surface of the thermoplastic resin layer of the obtained laminated film is subjected to corona treatment, and the surface and corona-treated surface of a PET film (biaxially stretched PET film [E5100] manufactured by Toyobo Co., Ltd., single-sided corona treatment, thickness 50 μm) Are bonded together by a dry laminating method (DL) using a two-component curable urethane adhesive (main agent: polyester resin, curing agent: aliphatic polyisocyanate, mass after drying: 3.5 g / m ² ). An adhesive film for product display according to the present invention was produced.
(Layer structure)
PET film 50 μm / DL / laminated film 55 μm (thermoplastic resin layer 35 μm / adhesive layer 10 μm / heat-sealable resin layer 10 μm)

<Example 2>
As an adhesive, an ethylene / vinyl acetate copolymer (EVA) (Mitsui / DuPont Polychemical Co., Ltd., [P1007], density = 0.93 g / cm ³ , MFR = 9.0 g / 10 min) is used. Otherwise, the adhesive film for product display of the present invention was produced in the same manner as in Example 1.

<Example 3>
Linear low-density polyethylene polymerized using a metallocene catalyst as heat-sealable resin (Prime Polymer Co., Ltd. [Evolue SP2020]: density = 0.916 g / cm ³ , MFR = 2.3 g / 10 min) The adhesive film for product display of the present invention was produced in the same manner as in Example 1 except that was used.

<Test>
In order to evaluate the adhesive films for product display of Examples 1 to 3, the following tests were performed.
The surface of the heat-sealable resin layer of the pressure-sensitive adhesive film produced in each example and a package sample (layer structure: biaxially stretched polypropylene film (OPP) 25 μm / DL / linear low density polymerized using a metallocene catalyst A sample was produced by heat-sealing the OPP surface of a polyethylene film (50 μm) under sealing conditions of a sealing temperature of 190 ° C., a sealing pressure of 1 kg / cm ² , and a sealing time of 0.3 seconds.

Using this heat-sealed product, the heat-sealing strength and re-sealing strength were evaluated as follows.
(Heat seal strength)
A strip-shaped test piece having a width of 35 mm was cut out from the heat-sealed product, and the heat seal strength (N / 35 mm width) was measured using a tensile tester at a peeling angle of 180 ° and a tensile speed of 300 mm / min.
(Re-seal strength)
When the heat-sealed product was peeled, delamination occurred between the pressure-sensitive adhesive layer / heat-sealable resin layer, and the pressure-sensitive adhesive layer was exposed. The sample in this state was pressure-bonded by hand and resealed, and the reseal strength (N / 35 mm width) was measured using a tensile tester at a peeling angle of 180 ° and a tensile speed of 300 mm / min.
(Measurement result)
The heat seal strength and reseal strength of the pressure-sensitive adhesive films for product display in Examples 1 to 3 were as follows.

  Any adhesive film of Examples 1 to 3 could be manufactured under good workability. Moreover, it peeled between an adhesive layer and a heat-sealable resin layer by peeling off a package body sample, and showed the resealability.

  In particular, the pressure-sensitive adhesive film of Example 1 surely had a beautiful release surface, and a sufficiently high reseal strength was obtained. On the other hand, although the adhesive films of Examples 2 and 3 can be put to practical use, the adhesive film of Example 2 has the reseal strength, and the adhesive film of Example 3 has the appearance of the release surface and the reseal strength. However, it was inferior to Example 1.

1. 1. Base film 2. Thermoplastic resin layer 3. Adhesive layer 4. Heat sealable resin layer Product 6. Adhesive film for product display

Claims (5)

A laminated film in which at least a heat-sealable resin layer, an adhesive layer, and a thermoplastic resin layer are laminated in this order by coextrusion film formation; and a base film laminated on the thermoplastic resin layer of the laminated film; A resealable adhesive film for product display comprising a laminate having
The heat-sealable resin layer is heat-sealed and adhered to the product adhesion surface, and then the product is peeled off, so that the pressure-sensitive adhesive layer is exposed in a resealable state at the heat-sealed portion. The resealable pressure-sensitive adhesive film for product display as described above.   The resealable pressure-sensitive adhesive film for product display according to claim 1, wherein the pressure-sensitive adhesive layer is a layer made of a hot-melt pressure-sensitive adhesive.   The resealable pressure-sensitive adhesive film for product display according to claim 2, wherein the hot-melt pressure-sensitive adhesive is made of a styrene copolymer.   The resealable pressure-sensitive adhesive film for product display according to any one of claims 1 to 3, wherein the heat-sealable resin layer is a layer made of polypropylene resin.   A merchandise display body in which a merchandise is heat-sealed on the resealable adhesive film for merchandise display according to any one of claims 1 to 4.

Images