JP2022045462A - Laminate - Google Patents

Abstract

To provide a laminate capable of being easily decomposed or detached, without breaking a constitution member such as an expanded material.SOLUTION: A laminate 10 comprises: a thermal peeling type adhesive agent layer 12 which can be peeled by heating; a first layer 11 provided on one surface 12A side of the thermal peeling type adhesive agent layer 12; and a current carrying body 18 which capable of heating the thermal peeling type adhesive agent layer 12 by energization.SELECTED DRAWING: Figure 1

Description

The present invention relates to, for example, a laminated product provided with a foam or the like and used as a vehicle interior material or the like.

Foams are used in various fields such as in-vehicle applications, electronic devices, consumer devices, and housing building materials. In each field, the foam is often adhered to the adherend by an adhesive or the like (see, for example, Patent Document 1). When the foam is removed from the adherend after use, it is generally peeled off and discarded while being broken because of its low mechanical strength.
Further, in recent years, foams, resin films, fabrics and the like are often combined with different materials and used as laminated products (see, for example, Patent Document 2). In laminated products, different materials are generally bonded to each other by an adhesive, but it is often difficult to separate each material.

Japanese Unexamined Patent Publication No. 2019-183142 WO2018 / 182010

In recent years, from the viewpoint of environmental consideration, there has been a demand to sort different materials by material for recycling. In addition, with the spread of car sharing and the like, one vehicle is often shared by an unspecified number of people, and along with this, there is a demand for vehicle interior materials to be replaced on a regular basis. Therefore, it is desired that various materials such as foams and resin films can be easily disassembled without being destroyed, and can be easily removed.

Therefore, it is an object of the present invention to make it possible to easily disassemble or remove various laminated products without destroying constituent members such as foams.

The gist of the present invention is as follows [1] to [10].
[1] A heat-removable adhesive layer that can be peeled off by heating,
The first layer provided on one surface side of the heat-peeling adhesive layer and
An energized body that can heat the heat-released adhesive layer by being energized,
Laminated product to prepare.
[2] The laminated product according to the above [1], wherein a drawer electrode portion is connected to the energized body.
[3] The laminate according to the above [1] or [2], wherein the first layer is at least one selected from the group consisting of a foam, a resin layer, a cloth, a leather, and a metal layer.
[4]- The laminated product according to any one of [3].
[5] The first double-sided tape structure having the heat-release adhesive layer is provided.
The first layer is provided on one side of the first double-sided tape structure.
The energizing body is provided on the other side of the first double-sided tape structure, or is arranged between the first layer and the first double-sided tape structure, the above [1] to [4]. ], The laminated product according to any one of the items.
[6] A light peeling type adhesive layer that can be peeled off by light irradiation and a second layer are provided.
Item 2. The laminate according to any one of [1] to [5], wherein at least the first layer, the heat-release adhesive layer, the second layer, and the light-release adhesive layer are provided in this order. Goods.
[7] The laminated product according to the above [6], which has a second double-sided tape structure having the light-release adhesive layer.
[8] The laminate according to the above [6] or [7], wherein the second layer is at least one selected from the group consisting of a foam, a resin layer, a cloth, a leather, and a metal layer.
[9] The above-mentioned [8], wherein the first layer is at least one selected from the group consisting of a resin layer, a cloth, leather, and a metal layer, and the second layer is a foam. Laminated product.
[10] The laminated product according to any one of the above [1] to [9], which is an automobile interior material.

In the present invention, various laminated products can be easily removed or disassembled without damaging constituent members such as foam.

It is a schematic sectional drawing which shows the laminated product which concerns on 1st Embodiment. It is a schematic sectional drawing which shows the laminated product which concerns on 2nd Embodiment. It is a schematic sectional drawing which shows the laminated product which concerns on 3rd Embodiment. It is a schematic sectional drawing which shows the laminated product which concerns on 4th Embodiment. It is a schematic sectional drawing which shows the laminated product which concerns on 5th Embodiment. It is a schematic sectional drawing which shows the laminated product which concerns on 6th Embodiment. It is a schematic sectional drawing which shows the laminated product which concerns on 7th Embodiment.

Hereinafter, the present invention will be described in detail with reference to the embodiments.
<First Embodiment>
FIG. 1 shows a laminated product 10 according to the first embodiment. The laminated product 10 includes a first layer 11, a heat-removable adhesive layer 12 that can be peeled off by heating, and an energizing body 18.
In the present embodiment, the first layer 11 is provided on one surface 12A of the heat-release adhesive layer 12. The energizing body 18 is provided on the other surface 12B of the heat-removable adhesive layer 12. A drawer electrode portion 19 is connected to the energizing body 18.
The energizing body 18 is partially provided on the other surface 12B as described later. Therefore, in the other surface 12B of the heat-peeling adhesive layer 12, the portion where the energizing body 18 is not provided is the adherend. It becomes an adhesive surface to be adhered. That is, the laminated product 10 is attached to the adherend by the heat-removable adhesive layer 12 via the energizing body 18.

In the present embodiment, in the laminated product 10, when a current is passed from the extraction electrode portion 19 and the energizing body 18 is energized, the heat-release type adhesive layer 12 is heated and the heat-release type adhesive layer 12 can be peeled off. .. As a result, the laminated product 10 attached to the adherend by the heat-removable adhesive layer 12 can be easily removed from the adherend.

Hereinafter, each component will be described in more detail.
[First layer]
Examples of the first layer 11 include a foam, a resin layer, a cloth, leather, a metal layer, and the like. The first layer 11 may be composed of one layer alone, or may be a laminated body having two or more layers. The first layer 11 is preferably a foam. The foam has low mechanical strength, and when it is attached to the adherend via the adhesive layer, it is difficult to remove it from the adherend without being damaged. However, in the present embodiment, the heat-release type adhesive layer 12 is used. By using it, it can be easily removed without being damaged.

[Foam]
The foam is a resin foam and is obtained by foaming the resin. As the resin used for the foam, the resin that can be used for the foam can be used without limitation, and polyvinyl chloride resin, silicone resin, acrylic resin, polyurethane resin, polyolefin resin, elastomer and the like can be used. Can be mentioned. These may be used alone or in combination of two or more.
Among these, a polyolefin-based foam containing a polyolefin-based resin is more preferable.
The foam may be composed of a single foam layer, or may be a multi-layered foam in which two or more foam layers are laminated. The individual foams constituting the multi-layered foam layer may have different physical characteristics such as composition, thickness, expansion ratio, and degree of cross-linking.

(Thickness)
The thickness of the foam is, for example, 0.01 to 100 mm. By setting the thickness of the foam to 0.01 mm or more, it becomes easy to exhibit various performances required for the foam such as cushioning property, shock absorption, tactile sensation (soft feeling), and flexibility. From these viewpoints, the thickness of the foam is preferably 0.1 to 50 mm, more preferably 0.5 to 20 mm.

(Effervescence magnification)
The foaming ratio of the foam is, for example, 1.2 to 100 times. When the foaming ratio is 1.2 times or more, it becomes easy to exhibit various performances required for the foam such as cushioning property, shock absorption, tactile sensation, and flexibility. Further, by setting the value to 100 times or less, it is possible to impart certain mechanical properties to the foam and prevent it from being damaged when the laminated product 10 is peeled off. From these viewpoints, the foaming ratio of the foam is preferably 2 to 50 times, more preferably 4 to 25 times.
The foaming ratio is determined by measuring the specific volume of the resin composition before foaming and the specific volume after foaming (unit: cm ³ / g), and by (specific volume of foam) / (specific volume of resin composition before foaming). It should be calculated.

(Crosslink degree (gel fraction))
The foam may be crosslinked. The foam is preferably crosslinked, for example, in the case of a polyolefin-based foam. The degree of cross-linking (gel fraction) of the foam is preferably 3 to 70% by mass. When the gel fraction is at least the above lower limit value, sufficient cross-linking is formed in the foam, so that the mechanical strength tends to be high, and damage at the time of peeling can be prevented. Further, when the degree of cross-linking is not more than the upper limit value, it becomes easy to improve cushioning property, shock absorption, tactile sensation, flexibility and the like. From such a viewpoint, the degree of cross-linking is more preferably 5 to 65% by mass, further preferably 10 to 60% by mass. The degree of cross-linking can be measured by the following measuring method.

<Measurement method>
About 100 mg of a test piece was collected from the foam, and the weight A (mg) of the test piece was precisely weighed. Next, this test piece was immersed in 30 cm ³ of xylene at 120 ° C. and left for 24 hours, then filtered through a 200 mesh wire mesh to collect the insoluble matter on the wire mesh, vacuum dried, and the weight of the insoluble matter. B (mg) was precisely weighed. From the obtained values, the degree of cross-linking (mass%) was calculated by the following formula.
Degree of cross-linking (% by mass) = (B / A) x 100

(Closed cell ratio)
The foam may be a closed cell type, an open cell type, or a semi-closed cell type. The closed cell type means that the bubbles contained in the foam are generally closed cells, and for example, the closed cell ratio is 70% or more. For example, in the case of a polyolefin-based foam, the foam is preferably a polyolefin-based foam, and the closed cell ratio is preferably 80% or more, preferably 90% or more.
Further, the open cell type means that the bubbles contained in the foam are generally closed cells, and the closed cell ratio here is less than 50%, and the semi-closed cell type is the closed cell ratio. Is 50% or more and less than 80%.
The closed cell ratio can be measured according to, for example, ASTM D2856 (1998).

(Polyolefin resin)
Examples of the polyolefin resin used for the polyolefin-based foam include polyethylene resin, polypropylene resin, ethylene-vinyl acetate copolymer and the like.
The polyethylene resin includes low density polyethylene resin (density 0.93 g / cm ³ or less, LDPE), medium density polyethylene resin (density greater than 0.930 g / cm ³ and less than 0.942 g / cm ³ , MDPE), and high density polyethylene resin. Density Polyethylene resin (density 0.942 g / cm ³ or more, HDPE) and the like can be mentioned. Further, the polyethylene resin may be a linear low density polyethylene resin (density 0.93 g / cm ³ or less, LLDPE).

The polyethylene resin may be a homopolymer of ethylene, but a copolymer of ethylene and a small amount of α-olefin containing ethylene as a main component (preferably 75% by mass or more, more preferably 90% by mass or more of all the monomers) or the like. But it may be. The linear low-density polyethylene resin is preferably a copolymer of ethylene and a small amount of α-olefin.
Examples of the α-olefin include those having 3 to 12 carbon atoms, more preferably 4 to 10 carbon atoms, and specifically, 1-butene, 1-pentene, 1-hexene and 4-methyl-1. -Pentene, 1-heptene, 1-octene and the like can be mentioned. In the copolymer, these α-olefins can be used alone or in combination of two or more.
Further, the polyethylene resin may be used alone or in combination of two or more.

The polypropylene resin may be homopolypropylene, which is a homopolymer of propylene, or propylene and a small amount of ethylene containing propylene as a main component (preferably 75% by mass or more, more preferably 90% by mass or more of all the monomers). Examples thereof include a copolymer with α-olefin other than propylene.
Examples of the copolymer of propylene and α-olefin other than ethylene and propylene include block copolymers (block polypropylene), random copolymers (random polypropylene), and random block copolymers.
Examples of α-olefins other than propylene include α-olefins having 4 to 10 carbon atoms such as 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, and 1-octene. Among these, ethylene is preferable from the viewpoint of moldability and heat resistance. In the copolymer, these α-olefins can be used alone or in combination of two or more.
Further, the polypropylene resin may be used alone or in combination of two or more.

Examples of the ethylene-vinyl acetate copolymer used as the polyolefin resin include an ethylene-vinyl acetate copolymer containing 50% by mass or more of a structural unit derived from ethylene. Since the ethylene-vinyl acetate copolymer has high compatibility with the polyethylene resin and the polypropylene resin, the ethylene-vinyl acetate copolymer can be used in combination with one or more selected from the polyethylene resin and the polypropylene resin.

The polyolefin-based foam may be composed of only the above-mentioned polyolefin resin as a resin component, but may contain other resin components such as an elastomer. The content of the polyolefin resin in the polyolefin-based foam is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 90% by mass or more, based on the total amount of the foam.

(Effervescent agent)
The foam may be formed by foaming with a foaming agent. The foaming agent may be a physical foaming agent, heat-expandable fine particles, or a chemical foaming agent. The foaming agent may be used in combination of two types, for example, a heat-expandable fine particle and a chemical foaming agent may be used in combination.
The physical foaming agent is not particularly limited as long as it is inert to the resin composition and can be impregnated, and examples thereof include carbon dioxide, butane gas, nitrogen gas, and air.

As the heat-expandable fine particles, heat-expandable microcapsules can be preferably used. Examples of the heat-expandable microcapsules include microspheres in which a substance such as isobutane, propane, and pentane that is easily gasified and expanded by heating is contained in an elastic shell. The shell is often formed of a heat-meltable substance or a substance that is destroyed by thermal expansion. Examples of the substance forming the shell include vinylidene chloride-acrylonitrile copolymer, polyvinyl alcohol, polyvinyl butyral, polymethylmethacrylate, polyacrylonitrile, polyvinylidene chloride, polysulfone and the like.

As the chemical foaming agent, a pyrolytic foaming agent is preferable. As the pyrolysis type foaming agent, an organic foaming agent and an inorganic foaming agent can be used, but an organic foaming agent is preferable. Examples of the organic foaming agent include azodicarbonamide, azodicarboxylic acid metal salt (azodicarboxylic acid barium, etc.), azo compounds such as azobisisobutyronitrile, nitroso compounds such as N, N'-dinitrosopentamethylenetetramine, and hydrazine. Examples thereof include zodicarbonamides, 4,4'-oxybis (benzenesulfonyl hydrazide), hydrazine derivatives such as toluenesulfonyl hydrazide, and semicarbazide compounds such as toluenesulfonyl semicarbazide.
Examples of the inorganic foaming agent include ammonium carbonate, sodium carbonate, ammonium hydrogencarbonate, sodium hydrogencarbonate, ammonium nitrite, sodium boron hydride, anhydrous monosoda citrate and the like.
Among the above, the pyrolytic foaming agent is preferably an azo compound, and more preferably an azodicarbonamide, from the viewpoint of obtaining fine bubbles, economy, and safety.
One type of pyrolysis foaming agent may be used alone, or two or more types may be used in combination.

When a physical foaming agent is used, it may be foamed by impregnating a resin composition containing a resin component, an additive to be blended if necessary, and the like with the foaming agent.
When a chemical foaming agent or heat-expandable fine particles are used, the foam can be produced by foaming a resin composition containing, for example, a resin and a foaming agent. Further, for example, in the case of a polyolefin-based foam, a resin composition containing a resin such as a polyolefin-based resin and a pyrolysis-type foaming agent is prepared, and the resin composition is irradiated with ionizing radiation as necessary. It is preferable that the resin is obtained by cross-linking and then foaming by heating.
In the case of a polyurethane resin foam, it is formed by reacting and foaming a resin composition containing a polyol compound, a polyisocyanate compound, and a foaming agent. The polyol compound and the polyisocyanate compound react and cure to become a polyurethane resin.

In addition to resins and foaming agents, resin compositions for obtaining foams include nucleating agents, cross-linking aids, decomposition temperature regulators, antioxidants, heat stabilizers, colorants, flame retardants, and antistatic agents. , Additives generally used for foams such as fillers (eg, thermally conductive fillers, etc.) may be blended.

[Resin layer, etc.]
The resin layer constituting the first layer 11 may be formed of various resins, but the resin may be an elastomer. Specifically, a polyvinyl chloride sheet, a mixed resin sheet of polyvinyl chloride and ABS resin, a polyurethane resin sheet, an acrylic resin sheet, a thermoplastic elastomer sheet, a polyolefin resin sheet, a mixed resin sheet of a polyolefin resin and a thermoplastic elastomer, etc. It should be formed. The resin layer may be a non-foaming layer.
The resin layer may be used as a protective layer for protecting the laminated product, or may be used as a decorative layer. In the case of a decorative layer, a decorative sheet (decorative film) may be used. Examples of the decorative sheet include a resin sheet or an elastomer sheet to which a decorative layer such as a lenticel or a wood grain pattern is applied by printing or the like.
Examples of the cloth include woven fabrics, knitted fabrics, and non-woven fabrics, and examples of leather include artificial leather and synthetic leather. Examples of the metal layer include metal foils such as aluminum, silver, gold, and copper, and metal meshes.

[Heat peeling adhesive layer]
The heat-removable adhesive layer 12 is made of an adhesive and can be peeled off by being heated. The laminated product 10 can be attached to various adherends via the heat-removable adhesive layer 12, and the adherend is heated after being attached to reduce the adhesive force to the adherend. It can be peeled off from.
When the heat-peeling adhesive layer 12 is heated to, for example, 85 to 210 ° C., the adhesive strength is lowered and the heat-peeling adhesive layer 12 can be peeled off from the adherend. By heating to 85 ° C. or higher and allowing the laminate to be peeled off, it is possible to prevent the laminated product 10 from being unexpectedly peeled off from the adherend under normal use environment. Further, when the temperature is 210 ° C. or lower, the workability when peeling the laminated product 10 from the adherend is improved. From these viewpoints, the heat-removable adhesive layer 12 can be peeled off by heating to preferably 90 to 200 ° C., more preferably 100 ° C. to 170 ° C.

The adhesive constituting the heat-peeling adhesive layer 12 is preferably made of an adhesive. The pressure-sensitive adhesive is a pressure-sensitive adhesive, and can be adhered to the adherend by contacting the adherend and applying pressure.
Examples of the pressure-sensitive adhesive constituting the heat-release type adhesive layer 12 include acrylic pressure-sensitive adhesive, urethane-based pressure-sensitive adhesive, silicone-based pressure-sensitive adhesive, rubber-based pressure-sensitive adhesive, vinyl alkyl ether-based pressure-sensitive adhesive, polyester-based pressure-sensitive adhesive, and polyamide-based pressure-sensitive adhesive. Examples thereof include agents, fluorine-based pressure-sensitive adhesives, and styrene-diene block copolymerization-based pressure-sensitive adhesives. Therefore, the pressure-sensitive adhesive may be any one of acrylic resin, urethane resin, silicone resin, rubber component, vinyl alkyl ether resin, polyester resin, polyamide resin, fluororesin, and styrene-diene block copolymer. It may be included as a base polymer.
Among these, rubber-based adhesives and acrylic-based adhesives are preferable, and acrylic-based adhesives are more preferable. Therefore, the pressure-sensitive adhesive preferably contains a rubber component or an acrylic resin, and more preferably contains an acrylic resin. As the acrylic resin, for example, a resin having a weight average molecular weight of about 200,000 to 2,000,000 may be used.
The weight average molecular weight is a polystyrene-equivalent value measured by gel permeation chromatography (GPC) measurement.

Examples of the acrylic resin include (meth) acrylic acid alkyl ester-based polymers, for example, a polymer of (meth) acrylic acid alkyl ester, or a (meth) acrylic acid alkyl ester, and a functional group-containing monomer. Examples thereof include acrylic polymers having a functional group such as a copolymer.
The (meth) acrylic acid alkyl ester is, for example, a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 18 carbon atoms, and preferably contains a (meth) acrylic acid alkyl ester having an alkyl group having 5 or less carbon atoms. ..
Examples of the functional group-containing monomer include carboxyl group-containing monomers such as acrylic acid and methacrylic acid, hydroxyl group-containing monomers such as hydroxyethyl (meth) acrylate and hydroxyethyl methacrylate, and glycidyl (meth) acrylate. Examples thereof include an epoxy group-containing monomer, an isocyanate group-containing monomer such as (meth) acrylate ethyl isocyanate, and an amino group-containing monomer such as aminoethyl acrylate and aminoethyl methacrylate.

The heat-release adhesive layer 12 preferably contains a foaming agent in addition to the base polymer. The foaming agent may be a foaming agent that foams by heating. When the heat-peelable adhesive layer 12 has a foaming agent, the foaming agent foams when heated, and the adhesive area with respect to an adherend or the like is reduced, whereby the adhesive strength is reduced and the adhesive layer 12 can be peeled off. ..

Examples of the foaming agent include either heat-expandable fine particles or chemical foaming agents, and among them, heat-expandable fine particles are preferable. As the heat-expandable fine particles, heat-expandable microcapsules can be preferably used. Further, as the chemical foaming agent, a pyrolysis type foaming agent is preferable. As the pyrolysis type foaming agent, an organic foaming agent and an inorganic foaming agent can be used, but an organic foaming agent is preferable. Details of the heat-expandable microcapsules and the organic foaming agent and the inorganic foaming agent are as described above.

The foaming start temperature of the foaming agent used for the heat-release adhesive layer 12 is, for example, 85 to 210 ° C, preferably 90 to 200 ° C, and more preferably 100 ° C to 170 ° C.
The foaming start temperature means the expansion start temperature in the case of thermally expandable fine particles. The measurement of the expansion start temperature can be performed using, for example, a thermomechanical analyzer (TMA). That is, a predetermined sample is placed in an aluminum container or the like, and a force of 0.1 N is applied from above, and the sample is heated from 80 ° C. to 220 ° C. at a heating rate of 5 ° C./min. It is preferable to measure the displacement of the measurement terminal in the vertical direction in this state and set the temperature at which the displacement starts to increase as the expansion start temperature.
The foaming start temperature means the decomposition start temperature in the case of a chemical foaming agent, and is from 80 ° C. to 300 ° C. at a heating rate of, for example, 2 ° C./min using a differential thermal weight simultaneous measuring device (TG / DTA). It is advisable to heat and draw a weight reduction curve, and set the turning point in the curve as the foaming start temperature.

The content of the foaming agent such as the heat-expandable fine particles is not particularly limited as long as the heat-releaseable adhesive layer 12 can be peeled off by heating, but is preferably 1 to 150 parts by mass with respect to 10 parts by mass of the base polymer. Is 10 to 130 parts by mass, more preferably 25 to 100 parts by mass.

The heat-peeling adhesive layer 12 may contain a conductive material. By containing the conductive material, for example, when an electric current is passed through the heat-release adhesive layer 12 to heat the heat-release adhesive layer 12, the heat-release adhesive layer 12 is heated. It will be easier.
Examples of the conductive material include one or more selected from carbon-based materials, metal-based materials, metal oxide-based materials, ionic polymers and conductive polymers.
Examples of carbon-based materials include carbon black, graphite, graphene, carbon nanotubes, and acetylene black. Examples of the metal-based material include metals having a higher potential than iron, such as gold, silver, copper, nickel, or alloys containing these, or iron. Examples of the metal oxide material include indium tin oxide (ITO), antimony trioxide (ATO), fluorine-doped tin oxide (FTO), zinc oxide and the like. Examples of the conductive polymer include polyacetylene, polypyrrole, PEDOT (polyethylenedioxythiophene), PEDOT / PSS (complex of polyethylenedioxythiophene and polystyrene sulfonic acid), polythiophene, polyaniline, poly (p-phenylene), polyfluorene, and the like. Examples thereof include polycarbazole, polysilane, and derivatives thereof. Examples of the ionic polymer include sodium polyacrylate and potassium polyacrylate.
As the conductive material, one of these may be used alone, or two or more of them may be used in combination.

When the adhesive is a pressure-sensitive adhesive, the pressure-sensitive adhesive may contain a pressure-sensitive adhesive resin in addition to the base polymer.
The adhesive such as the pressure-sensitive adhesive used for the heat-release type adhesive layer 12 may further contain an adhesive or various additives used for the pressure-sensitive adhesive, for example, a cross-linking agent, an antioxidant, and the like. It may contain known additives such as antistatic agents, plasticizers, resins, surfactants, waxes and fine particle fillers.

The thickness of the heat-release adhesive layer 12 is not particularly limited, but is, for example, 30 to 300 μm, preferably 50 to 200 μm. When the thickness of the light-release adhesive layer is within the above range, an appropriate adhesive force can be ensured.
In the above description, the adhesive used for the heat-peelable adhesive layer 12 is one in which the foaming agent foams by heating and thereby reduces the adhesive strength, but the adhesive strength is increased by heating. As long as it is lowered, the adhesive strength may be lowered by using a non-foaming agent. For example, the heat-peeling adhesive layer 12 may be cured by heating to increase the elastic modulus to reduce the adhesive force.

[Energizing body]
The energizing body 18 may have any structure as long as the heat-peeling adhesive layer 12 can be heated by passing an electric current. The conductor 18 may be formed of a metal such as iron, copper, silver, gold, nickel, chromium, lead, tin, or an alloy containing one or more of these, and a metal oxide such as ITO, IZO, ZnO, and IGZO. ..
The energizing body 18 may have, for example, an electric heating wiring that is heated by passing a current through the wiring. The wiring may be in the form of a plate, a film, or the like, and may be wound in a coil shape on the other surface 12B, or may be wound in a coil shape, for example.
Further, the energizing body 18 may be an electric heating sheet having electric heating wiring. Commercially available products may be used as the electric heating sheet.
Further, for example, a positive electrode and an anode arranged at positions separated from each other may be provided on the other surface 12B. In this case, when a voltage is applied between the positive electrode and the anode, a current is passed through the heat-peeling adhesive layer 12, whereby the heat-peeling adhesive layer 12 is heated. On the other surface 12B, the positive electrode and the anode may be singular, respectively, but one or both may be provided in a plurality.

The energizing body 18 is partially provided on the other surface 12B of the heat-removable adhesive layer 12. The energizing body 18 may be adhered to the other surface 12B of the heat-removable adhesive layer 12. On the other hand, a part of the other surface 12B to which the energizing body 18 is not provided becomes an adhesive surface for adhering to the adherend. The energizing body 18 may be arranged, for example, over the entire other surface 12B so that the entire heat-peeling adhesive layer 12 is heated. For example, when the energizing body 18 is provided with the electric heating wiring wound in a coil shape on the other surface 12B, the wiring is also an adhesive surface, so that the electric heating wiring is arranged over the entire other surface 12B. It will be easier to do.
The thickness of the energizing body 18 is not particularly limited, but is, for example, 2 to 1000 μm, preferably 5 to 300 μm.

It is preferable that the lead-out electrode portion 19 is connected to the energizing body 18. The lead-out electrode portion 19 is formed by being pulled out from the heat-releaseable adhesive layer 12. The extraction electrode portion 19 may be formed of a metal such as iron, copper, silver, gold, nickel, chromium, lead, tin or an alloy containing one or more of these. The extraction electrode portion 19 may be formed by a member separate from the energizing body 18, or may be integrally formed.
The extraction electrode portion 19 is a portion that serves as an electrode for energizing the energizing body 18, and a current is passed from a power source (not shown) to the energizing body 18 via the drawing electrode portion 19.
As the energizing body 18, a commercially available product can also be used, and for example, a micro heater manufactured by Nippon Heater Co., Ltd., a silicon rubber heater manufactured by Three High Co., Ltd., or the like can be used.

In the laminated product 10, a release sheet (not shown) or the like may be attached to the surface (adhesive surface) of the heat release type adhesive layer 12. By attaching the release sheet to the laminated product 10, it becomes possible to protect the surface (adhesive surface) of the heat release type adhesive layer 12. As the release sheet, a known release sheet can be used, and for example, a release sheet on which at least one surface of a base material such as a resin film or paper has been peeled can be used. When the release sheet is attached to the laminated product 10, the release sheet may be peeled off at the time of use. Further, the laminated product 10 may be in a wound state. The wound laminated product 10 can be used by feeding it out at the time of use.

[how to use]
The laminated product in this embodiment can be used by being attached to various adherends. The adherend is not particularly limited, but various vehicles such as automobiles, two-wheeled vehicles, railroad vehicles, transportation equipment other than vehicles such as ships and airplanes, electronic equipment, electric appliances, furniture, stationery, and various buildings such as building materials for housing. Things and the like can be mentioned. Among these, it is preferable to be used for vehicles, electronic devices, and electrical appliances.
Among the above, the laminated product is more preferably used for a vehicle, and particularly preferably used as a vehicle interior material. The vehicle interior material is a ceiling material, a door, an instrument panel, or the like, and more preferably an automobile interior material.

The laminated product 10 attached to the adherend may be removed from the adherend after use, for example. Here, the laminated product 10 may be peeled off from the adherend after heating the heat-peeling adhesive layer 12 by passing an electric current through the energizing body 18. The heat-removable adhesive layer 12 is preferably heated to a temperature at which the adhesive strength is reduced and can be peeled off, for example, to 85 to 210 ° C., preferably 90 to 200 ° C., more preferably 100 ° C. to 170 ° C. Be heated.
When the heat-removable adhesive layer 12 is heated by the above-mentioned energization, the adhesive force to the adherend is reduced and the heat-peelable adhesive layer 12 can be easily peeled off from the adherend. Therefore, the laminated product 10 can be easily removed from the adherend without damaging the adherend or the first layer 11. Therefore, it becomes easy to separate each material, and it becomes easy to recycle the first layer 11.

Further, when the heat-removable adhesive layer 12 is heated, not only the adhesive force to the adherend but also the adhesive force to the first layer 11 and the current-carrying body 18 decreases. Therefore, at least one of the first layer 11 and the current-carrying body 18 may be peeled from the heat-peeling adhesive layer 12.
By peeling the first layer 11 from the heat-peeling adhesive layer 12 and also peeling the energizing body 18 from the heat-peeling adhesive layer 12, the separation of each material is further advanced, and the first layer is further separated. 11. The heat-removable adhesive layer 12 and the energizing body 18 can be easily recycled.
When the first layer 11 and the energizing body 18 can be peeled off from the heat-peeling adhesive layer 12, the peeling order of each layer when removing the laminated product 10 from the adherend is not particularly limited, but the first layer 11 can be peeled off. After peeling from the heat-peeling adhesive layer 12, the heat-peeling adhesive layer 12 may be peeled from the adherend, and then the energizing body 18 may be peeled from the heat-peeling adhesive layer 12. Further, after the laminated body composed of the energizing body 18, the heat-removable adhesive layer 12 and the first layer 11 is peeled off from the adherend, each member may be peeled off from each other.

In the laminated product 10 in the first embodiment, the heat-release type adhesive layer 12 is formed on the first layer 11, and the side on which the first layer 11 of the heat-release type adhesive layer 12 is provided is It can be manufactured by laminating the energizing body 18 on the opposite surface (the other surface 12B).
For example, by laminating the heat-release adhesive layer 12 formed on the release sheet on the first layer 11, it is preferable to first form the heat-release adhesive layer 12 on the first layer 11. Alternatively, the heat-peelable adhesive layer 12 may be formed on the first layer 11 by directly applying the adhesive to the first layer 11. After that, for example, the current-carrying body 18 may be attached to the other surface 12B of the heat-released adhesive layer 12 formed on the first layer 11 to manufacture the laminated product 10.
However, the energizing body 18 may be manufactured by applying or printing a metal paste such as silver paste on a member (heat peeling type adhesive layer 12) constituting the laminated product to form wiring. However, it may be produced by forming a metal film by plating, vapor deposition, sputtering or the like.

<Second embodiment>
In the above first embodiment, one layer of the release type adhesive layer is provided in the laminated product, but a plurality of layers may be provided as shown in the second embodiment below.
FIG. 2 shows the laminated product 20 according to the second embodiment. In the second embodiment, the laminated product 20 has a heat-peeling adhesive layer 12, a first layer 11, a current-carrying body 18, and a photo-peeling adhesive layer 17 that can be peeled by light irradiation. It differs from the first embodiment in that it has a second layer 21. Hereinafter, the second embodiment will be described mainly on the differences from the first embodiment, and the description of the same configuration as that of the first embodiment will be omitted.

The laminated product 20 according to the second embodiment includes a heat-release type adhesive layer 12, a first layer 11 provided on one surface 12A of the heat-release type adhesive layer 12, and a heat-release type adhesive layer. A current-carrying body 18 provided on the other surface 12B of the 12 is provided. Since the configurations of the heat-removable adhesive layer 12, the first layer 11, and the energizing body 18 are the same as those in the first embodiment, the description thereof will be omitted. That is, the energizing body 18 is partially provided on the other surface 12B of the heat-removable adhesive layer 12. The other surface 12B of the heat-removable adhesive layer 12 also serves as an adhesive surface for being adhered to another member (second layer 21).

In the present embodiment, the energizing body 18 preferably has light transparency, and more preferably ultraviolet light transmission. With light transmission, even if the energizing body 18 remains on the second layer 21 after the first layer 11 is removed, the light peeling adhesive layer 17 is irradiated with light (preferably) as described later. Is irradiated with ultraviolet rays), it is possible to prevent the energizing body 18 from obstructing light irradiation. The energizing body 18 can be imparted with light transmission by being formed of, for example, a metal oxide such as ITO, IZO, ZnO, or IGZO.

Further, the laminated product 20 includes a photo-peeling adhesive layer 17 and a second layer 21 provided on one surface of the photo-peeling adhesive layer 17, and the second layer 21 is interposed via the current-carrying body 18. It is adhered to the other surface 12B of the heat-peeling adhesive layer 12. That is, the laminated product 20 includes a first layer 11, a heat-peeling adhesive layer 12, a second layer 21, and a photo-peeling adhesive layer 17, and these are provided in this order. Then, the energizing body 18 may be arranged on the other surface 12B of the heat-removable adhesive layer 12.

[First and second layers]
In the present embodiment, examples of the second layer 21 include a foam, a resin layer, a cloth, leather, a metal layer, and the like, but the second layer 21 does not have to be decorative, and therefore, among these, the second layer 21 does not have to be decorative. A foam, a resin layer, and a metal layer are preferable. The detailed description thereof is as described in the first embodiment, and the description thereof will be omitted. The second layer 21 may be composed of one layer alone or may be a laminated body having two or more layers.
However, the second layer 21 is preferably a foam. When the second layer 21 is made of a foam, the laminated product 20 can be provided with functions such as cushioning property, impact absorption, tactile sensation (soft sensation), and flexibility, and is particularly suitable as a vehicle interior material.

Further, it is preferable that the second layer 21 has a light transmissive property. Since the second layer 21 has light transmission property, as will be described later, when light is irradiated from the second layer 21 side (that is, the upper side of FIG. 2), the light is transmitted through the second layer 21. The light peeling type adhesive layer 17 is also irradiated, and the light peeling type adhesive layer 17 can be peeled off.
As will be described later, the photo-peelable adhesive layer 17 can be peeled off by being irradiated with light having a predetermined wavelength, and more preferably by being irradiated with ultraviolet rays. Therefore, it is preferable that the second layer 21 can transmit light having the above-mentioned predetermined wavelength, and more preferably it can transmit ultraviolet rays.

The ultraviolet transmittance of the second layer 21 may be, for example, 0.1% or more, but is preferably 3% or more so that the light-peelable adhesive layer 17 can be peeled off by a small amount of ultraviolet irradiation, preferably 10%. The above is more preferable. The ultraviolet transmittance of the second layer 21 is not particularly limited with respect to the upper limit thereof, but is, for example, 90% or less.
The ultraviolet transmittance is an ultraviolet transmittance at a wavelength of 365 nm, and can be measured by, for example, a spectrophotometer.

When the second layer 21 is a foam, the ultraviolet transmittance can also be adjusted by adjusting the expansion ratio, the thickness, and the like. For example, if the thickness of the second layer 21 is reduced and the foaming ratio is increased, the ultraviolet transmittance tends to increase.
Further, when the second layer 21 is a resin layer, it has transparency, so that it can have the light transmission as described above. Further, in the case of a decorative sheet, it is preferable that the decorative layer also has light transmission. Further, in the case of fabric, leather, and metal layer, by using coarse woven fabric, knitted fabric, non-woven fabric, etc., using metal mesh, and providing a large number of fine holes, a second method can be used. The layer 21 is preferably light transmissive.

The thickness of the second layer is not particularly limited, but is, for example, 0.05 to 5 mm, preferably 0.1 to 4 mm, and more preferably 0.5 to 3 mm.

The first layer 11 is any one of a foam, a resin layer, a cloth, a leather, a metal layer, and the like, as described in the first embodiment. These may be composed of one layer alone, or may be a laminated body having two or more layers.
The first layer 11 is a surface layer arranged outside the second layer 21 at the time of use, and is used, for example, to function as a protective layer or improve the design of the laminated product 20. To.
Therefore, when the second layer 21 is a foam as described above, it is preferable that the first layer 11 is any of a resin layer, a cloth, leather, or a metal layer. Further, the resin layer is preferably a decorative sheet. When the second layer 21 is a foam and the first layer 11 is any of these, it is particularly suitable when the laminated product 20 is used as an automobile interior material.

Further, as will be described later, the light peeling type adhesive layer 17 can be peeled off by being irradiated with light having a predetermined wavelength, and more preferably by being irradiated with ultraviolet rays.
Therefore, in the second embodiment, the first layer 11 preferably has a lower transmittance for light having the above-mentioned predetermined wavelength than the second layer 21, and more preferably has a lower transmittance for ultraviolet rays. It is even more preferable that the ultraviolet rays are not substantially transmitted. The low ultraviolet transmittance of the first layer 11 prevents the light peeling adhesive layer 17 from being irradiated with light from the outside under normal use conditions, so that the light peeling adhesive layer 17 is formed. It is possible to prevent accidental peeling due to light from the outside. In addition, various kinds of materials can be applied to the first layer 11.

[Light peeling type adhesive layer]
The light peeling type adhesive layer 17 is made of an adhesive and can be peeled off by being irradiated with light. The photo-peelable adhesive layer 17 is an adhesive surface for one surface to be adhered to the second layer 21 and the other surface to be adhered to the adherend.
The laminated product 20 can be attached to various adherends by the photo-peelable adhesive layer 17, and the adhesive force to the adherend is reduced by irradiation with light after the attachment, so that the laminate 20 is adhered. It can be peeled off from the body. It is preferable that the light-removable adhesive layer 17 has a reduced adhesive strength and can be peeled off by irradiation with light having a predetermined wavelength, but it is preferable that the adhesive strength is lowered and the photo-peelable adhesive layer 17 can be peeled off by irradiation with ultraviolet rays. If it can be peeled off by ultraviolet rays, the light peeling type adhesive layer 17 can be efficiently peeled off with a simple device. Further, when the laminated product 20 is used by being attached to an adherend, the laminated product 20 is generally not irradiated with ultraviolet rays, so that the adhesive strength of the photo-peelable adhesive layer 17 is lowered by normal use. , Can be prevented from peeling off.

The adhesive constituting the photo-peelable adhesive layer 17 contains, for example, a photo-curable component, and the photo-curable component is cured by irradiating it with light of a predetermined wavelength, preferably ultraviolet rays, thereby photo-peeling. Examples thereof include those that increase the elastic coefficient of the mold adhesive layer 17 to reduce the adhesive force and enable peeling.
Further, as the light peeling type adhesive layer 17, for example, an adhesive containing a gas generating agent that generates a gas by irradiating light having a predetermined wavelength, preferably ultraviolet rays, can also be used. When the light peeling type adhesive layer 17 contains a gas generating agent, gas is generated from the gas generating agent by light irradiation, and at least a part of the adhesive surface with the adherend is peeled off by the generated gas to increase the adhesive force. It can be lowered and peeled off.
Further, the light peeling type adhesive layer 17 may be composed of an adhesive containing both a photocurable component and a gas generating agent that generates a gas by light irradiation. When both of these are contained, the elastic modulus of the entire photo-peelable adhesive layer increases due to the curing of the photocurable component, and at least a part of the adhesive surface with the adherend is peeled off by the gas generated from the gas generating agent. As a result, the adhesive strength is more likely to decrease.

The photocurable component may be one that is cured by being irradiated with light having a predetermined wavelength, but is preferably an ultraviolet curable type that is cured by ultraviolet irradiation. Similarly, the gas generating agent may be any one that generates a gas by being irradiated with light having a predetermined wavelength, but a gas generating agent that generates a gas by irradiation with ultraviolet rays is preferable.

The adhesive constituting the photo-peelable adhesive layer 17 is preferably made of an adhesive. The type of the pressure-sensitive adhesive constituting the light-release adhesive layer 17 is as described in the first embodiment, and the usable base polymer is the same as that in the first embodiment. Among the above, the pressure-sensitive adhesive in the second embodiment is preferably a rubber-based pressure-sensitive adhesive or an acrylic-based pressure-sensitive adhesive, and more preferably an acrylic-based pressure-sensitive adhesive. Therefore, the pressure-sensitive adhesive preferably contains a rubber component and an acrylic resin, and more preferably contains an acrylic resin. As the acrylic resin, for example, a resin having a weight average molecular weight of about 200,000 to 2,000,000 may be used.

Examples of the acrylic resin include (meth) acrylic acid alkyl ester-based polymers, for example, a polymer of (meth) acrylic acid alkyl ester, or a (meth) acrylic acid alkyl ester, and a functional group-containing monomer. Examples thereof include acrylic polymers having a functional group such as a copolymer.
Details of the (meth) acrylic acid alkyl ester and the functional group-containing monomer are as described above.

When the pressure-sensitive adhesive contains a photocurable component, at least a part of the above base polymer may be a photocurable component, a photocurable component may be added as a component other than the base polymer, or the base polymer may be lightened. A photocurable component other than the base polymer may be added while making it a curable component.
For example, when the pressure-sensitive adhesive is an acrylic pressure-sensitive adhesive and the acrylic resin is a photo-curable component, at least a part of the acrylic resin may be photo-curable (preferably UV-curable). Specifically, such a photocurable acrylic resin is a compound having a functional group that reacts with the functional group and a radically polymerizable unsaturated bond in the acrylic polymer having the above functional group (hereinafter, "" It can be obtained by reacting with a functional group-containing unsaturated compound. As the functional group-containing unsaturated compound, at least one selected from the above-mentioned functional group-containing monomers may be used.

As the functional group-containing unsaturated compound, for example, when the functional group of the acrylic polymer is a carboxyl group, an epoxy group-containing monomer or an isocyanate group-containing monomer may be used. When the functional group is a hydroxyl group, an isocyanate group-containing monomer may be used. When the functional group is an epoxy group, a carboxyl group-containing monomer or an amide group-containing monomer such as acrylamide may be used. When the functional group is an amino group, an epoxy group-containing monomer may be used.

Examples of the photocurable component as a component other than the base polymer include polyfunctional oligomers and monomers. Examples of the polyfunctional oligomer include those having a weight average molecular weight of 10,000 or less.
The polyfunctional oligomer or monomer has a plurality of radically polymerizable unsaturated bonds in the molecule, for example, the number of radically polymerizable unsaturated bonds in the molecule is 2 to 20. Examples of the polyfunctional oligomer or monomer include trimethylolpropanetri (meth) acrylate, tetramethylolmethanetetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, and dipentaerythritol monohydroxypenta. (Meta) acrylate, dipentaerythritol hexa (meth) acrylate, 1,4-butylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, polyethylene glycol di (meth) acrylate, commercially available oligoester Examples thereof include (meth) acrylate.
Further, the polyfunctional oligomer or monomer is more preferably used in combination with the above-mentioned photopolymerizable acrylic resin.

The gas generating agent used for the photo-peeling adhesive layer is not particularly limited, and examples thereof include an azide compound and an azo compound. Azide compounds and azo compounds generate nitrogen gas when stimulated by light, for example, ultraviolet rays. As the gas generator, an azide compound having excellent heat resistance is suitable.
The azide compound is not particularly limited, and is, for example, 3-azidomethyl-3-methyloxetane, terephthalazide, p-tert-butylbenzazide, 3-azidomethyl-3.
-Glysidyl azide polymer (GA) obtained by ring-opening polymerization of methyloxetane.
Examples thereof include polymers having an azido group such as P).

When the adhesive contains a photopolymerizable component, it preferably contains a photopolymerization initiator. When the adhesive is a pressure-sensitive adhesive, the pressure-sensitive adhesive may contain a pressure-sensitive adhesive resin in addition to the base polymer.
Further, the adhesive used for the photo-peeling adhesive layer 17 may further contain various additives used for an adhesive, an adhesive, or the like, and may be further blended with, for example, a cross-linking agent, an antioxidant, an antioxidant, and the like. , Plasticizers, resins, surfactants, waxes, fine particle fillers and other known additives may be contained.

As the adhesive used for the light peeling type adhesive layer 17, a gas that generates gas or hardens by light irradiation and thereby lowers the adhesive strength is used, but the adhesive strength is increased by light irradiation. As long as it is reduced, the adhesive strength may be reduced by other configurations.
Further, known adhesives can also be used, and for example, the adhesives described in Japanese Patent No. 3566710, Japanese Patent No. 4238037, Japanese Patent No. 4653859, and the like may be used. Further, "ultraviolet curable adhesive LC-3200" manufactured by 3M Ltd. can also be used.

The thickness of the light-release adhesive layer 17 is not particularly limited, but is, for example, 30 to 300 μm, preferably 50 to 200 μm. When the thickness of the light-release adhesive layer is within the above range, an appropriate adhesive force can be ensured.

In the present embodiment, the laminated product 20 is used by being attached to an adherend with the light peeling type adhesive layer 17 as an adhesive surface. Further, the laminated product 20 may be removed from the adherend, for example, after use. The laminated product 20 of the present embodiment is preferably removed from the adherend by the following procedure.

First, in the laminated product 20 of the present embodiment, for example, the heat release type adhesive layer 12 is heated by passing an electric current through the energizing body 18. The details of heating are as described in the first embodiment. By this heating, the heat-removable adhesive layer 12 can be typically peeled off from the second layer 21, for example, the first layer 11, the heat-removable adhesive layer 12, and the current-carrying body. The laminate of 18 may be removed with respect to the second layer 21.

Then, after irradiating the light-peeling adhesive layer 17 with light, the rest of the laminated product 20 including the second layer 21 and the light-peeling adhesive layer 17 may be removed from the adherend. At this time, the light is preferably emitted from the second layer 21 side, but when the adherend has light transmission, the light may be irradiated from the adherend side. The light used is preferably ultraviolet light as described above. The irradiation dose of ultraviolet rays to the light-release adhesive layer 12 is not particularly limited, but may be, for example, 500 mJ / cm ² or more, and the wavelength of ultraviolet rays may be selected from, for example, 200 to 410 nm.

When the light-peeling adhesive layer 17 is irradiated with light, the adhesive force to the adherend is reduced and the photo-peelable adhesive layer 17 can be easily peeled off from the adherend. Therefore, the second layer 21 can be easily removed from the adherend without damaging the adherend or the second layer 21. Therefore, it becomes easy to separate each material, and it becomes easy to recycle the foam 11.

The work of peeling off each layer is not limited to the above procedure, and may be performed by any procedure.
For example, the heat-removable adhesive layer 12 can be peeled off from the first layer 11 or from both the first and second layers 11 and 21 by energization heating, or It may be possible to peel off the current-carrying body. Therefore, the first layer 11 alone or the laminated body of the first layer 11 and the heat-peeling adhesive layer 12 may be removed, and the energizing body 18 may remain on the second layer 21. Further, the first layer 11, the heat-removable adhesive layer 12, and the energizing body 18 may be peeled off in order for each layer, for example, by energizing and heating.
Further, when the light peeling type adhesive layer 17 is removed from the adherend, the laminated body of the second layer 21 and the photoremovable adhesive layer 17 may be peeled off from the adherend, and these may be peeled off from the adherend. It may be peeled off separately. Of course, the laminated body of the light peeling adhesive layer 17 and the second layer 21 may be removed from the adherend while the energizing body 18 is provided on the second layer 21.

As described above, in the present embodiment, the adhesive strength of the peeling adhesive layers 12 and 17 is reduced by sequentially energizing the energizing body 18 and irradiating the light peeling adhesive layer 17 with light. By making it peelable, the first and second layers 11 and 21 can be easily separated and removed from the adherend without damaging the adherend and the first and second layers 11 and 21. Therefore, in the laminated product 20 having not only the first layer 11 but also the second layer 21, it becomes easy to separate each material, and it becomes easy to recycle each layer of the laminated product 20.
Further, in the present embodiment, as described above, it is possible to remove only the first layer 11 from the second layer 21 and the first layer 11. Therefore, for example, the first layer 11 is removed. It is also possible to leave the second layer 21 on the adherend, and the use of the laminated product 20 is expanded.

The laminated product 20 in the second embodiment forms a first laminated body in which a heat-peeling adhesive layer 12 and an energizing body 18 are laminated on a first layer 11, and a photo-peeling type on a second layer 21. It can be manufactured by forming a second laminated body in which the adhesive layer 17 is laminated, and adhering these two laminated bodies via the heat-release type adhesive layer 12.
At this time, the first laminated body can be manufactured in the same manner as the laminated product 10 of the first embodiment.
Further, the second laminated body may be manufactured by laminating the light peeling type adhesive layer 17 formed on the release sheet on the second layer 21. Further, it may be obtained by directly applying an adhesive to the second layer 21 to form a heat-peeling adhesive layer 17 on the second layer 21.
However, the laminated product 20 in the second embodiment is not limited to the above manufacturing method, and may be manufactured by any method.

<Third embodiment>
Next, a third embodiment of the present invention will be described with reference to FIG. In each of the above embodiments, the energizing body 18 is arranged on the other surface 12B side of the heat-removable adhesive layer 12, but in the present embodiment, the energizing body 18 is the heat-removing adhesive layer 12. It is arranged on one surface 12A (that is, the surface on the side where the first layer 11 is provided), and is arranged between the first layer 11 and the heat-removable adhesive layer 12. Hereinafter, the third embodiment will be described mainly on the differences from the first embodiment, and the description of the same configuration as that of the first embodiment will be omitted.

The energizing body 18 in the present embodiment is partially provided on one surface 12A of the heat-removable adhesive layer 12, and therefore, one surface 12A of the heat-removing adhesive layer 12 is provided with the energizing body 18. It is possible to adhere to the first layer 11 by the missing portion. Further, the other surface 12B of the heat-removable adhesive layer 12 becomes an adhesive surface to be adhered to the adherend.
Further, also in the present embodiment, when the energized body 18 is energized, the heat-removable adhesive layer 12 is heated, whereby the heat-removable adhesive layer 12 can be peeled off from the adherend, and the first embodiment is performed. Similar to the form, the laminated product 25 can be removed from the adherend.

The heat-removable adhesive layer 12 may be detachable from one or both of the energizing body 18 and the first layer 11 by heating. With such a configuration, the energizing body 18 and the first layer 11 and the heat-removable adhesive layer 12 can be separated by heating, so that the separation of each material becomes easier.
Further, in the third embodiment, the laminated product 25 shows a configuration that does not have the second layer 21 and the light-release adhesive layer 17, but the second layer 21 and the second layer 21 and the same as in the second embodiment. It may have a light peeling type adhesive layer 17. That is, even if the laminated product has a laminated structure in which the first layer 11, the current-carrying body 18, the heat-peeling adhesive layer 12, the second layer 21, and the photo-peeling adhesive layer 17 are provided in this order. good.

The laminated product 25 in the third embodiment is manufactured by laminating the energizing body 18 on the first layer 11 and laminating the heat release type adhesive layer 12 on the first layer 11 on which the energizing body 18 is laminated. Alternatively, the current-carrying body 18 may be laminated on the heat-removable adhesive layer 12 and then the first layer 11 may be further bonded to produce the product. The method of laminating the current-carrying body 18 on the first layer 11 or the heat-released adhesive layer 12 is as described in the first embodiment.

<Fourth Embodiment>
In the second embodiment described above, the peelable adhesive layers 12 and 17 were not supported by the base material, but the heat peelable adhesive layers 12 and 17 were supported by the base material. You may use it. A specific example thereof is shown in FIG. 4 as a fourth embodiment. Hereinafter, the fourth embodiment will be described mainly on the differences from the second embodiment, and the description of the same configuration as that of the second embodiment will be omitted.

In the laminated product 30 according to the fourth embodiment, a base material (first base material 31 and second base material 32) is provided for each of the peelable adhesive layers 12 and 17, and each base material 31 is provided. , 32 has a double-sided tape structure (first double-sided tape structure 28, second double-sided tape structure 29).
Then, as shown in FIG. 4, a first layer 11 is provided on one surface side of the first double-sided tape structure 28, and an energizing body 18 is provided on the other surface side, and a second layer is provided via the energizing body 18. A second double-sided tape structure 29 is further adhered to the second layer 21 while the layer 21 of the above is adhered.

The first double-sided tape structure 28 has a first base material 31, a heat-release adhesive layer 12 adhered to one surface of the first base material 31, and the other surface of the first base material 31. It is provided with an adhesive layer 33 to be adhered to. In the first double-sided tape structure 28, the heat-release adhesive layer 12 is adhered to the first layer 11, and the adhesive layer 33 is adhered to the second layer 21 via the current-carrying body 18.
The second double-sided tape structure 29 has a second base material 32, a light-release adhesive layer 17 bonded to one surface of the second base material 32, and the other surface of the second base material 32. It is provided with an adhesive layer 34 to be adhered to. In the second double-sided tape structure 29, the light-release adhesive layer 17 constitutes an adhesive surface with the adherend, and is further adhered to the second layer 21 by the adhesive layer 34.

With the above configuration, the laminated product 30 includes a first layer 11, a heat-release adhesive layer 12, a first base material 31, an adhesive layer 33 (sometimes referred to as a first adhesive layer 33), and energization. Body 18, second layer 21,
It has a laminated structure in which an adhesive layer 34 (sometimes referred to as a second adhesive layer 34), a second base material 32, and a photo-peelable adhesive layer 17 are provided in this order.

The first and second base materials 31 and 32 are not particularly limited, and for example, plastic films such as polyethylene, polyethylene terephthalate, polypropylene and polyurethane, and cloths such as non-woven fabric can be used. The thickness of the base material is not particularly limited, but is, for example, 2 to 188 μm, preferably 12 to 50 μm, from the viewpoint of ensuring a certain strength and the thinness of the double-sided tape. As will be described later, it is preferable that the first and second base materials 31 and 32 both have light transmission, and above all, ultraviolet transmission.
The first and second adhesive layers 33 and 34 may be made of an adhesive, respectively, but are preferably made of an adhesive. Adhesives include acrylic adhesives, urethane adhesives, silicone adhesives, rubber adhesives, vinyl alkyl ether adhesives, polyester adhesives, polyamide adhesives, fluorine adhesives, and styrene-diene. Block copolymerization system adhesives and the like can be mentioned.
The thickness of each of the first and second adhesive layers 33 and 34 is, for example, 20 to 300 μm, preferably 50 to 200 μm, from the viewpoint of ensuring a constant adhesive force and the thinness of the double-sided tape.
Further, it is preferable that the first and second adhesive layers 33 and 34 both have light transmittance, particularly ultraviolet ray transmission.

Also in the present embodiment, as in the second embodiment, first, when the energizing body 18 is energized, the heat-peeling adhesive layer is passed through the first adhesive layer 33 and the first base material 31. 12 is heated. By this heating, the heat-removable adhesive layer 12 can be peeled off from the first layer 11 or the first base material 31. The heat-removable adhesive layer 12 is usually preferably removable from the first layer 11, but can be peeled off from both the first layer 11 and the first base material 31. You may.
After that, the first layer 11 may be peeled off from the twelfth double-sided tape structure 28. Alternatively, the laminate of the first layer 11 and the heat-released adhesive layer 12 or the first layer 11 and the heat-released adhesive layer 12 may be sequentially peeled from the first base material 31 in this order. good.

Next, as in the second embodiment, the light-peeling adhesive layer 17 is irradiated with light (preferably ultraviolet rays) to make the light-peeling adhesive layer 17 peelable, and the second layer is formed. The rest of the laminate 30 including the 21 and the second double-sided tape structure 29 is peeled off from the adherend. At this time, the second layer 21 may be peeled off from the adherend together with, for example, the second double-sided tape structure 29.
Further, the light peeling type adhesive layer 17 may be peelable not only on the adherend but also on the second base material 32. As a result, the second base material 32 and the light-release adhesive layer 17 can be separated.

Here, it is preferable that the light peeling type adhesive layer 17 is irradiated with light from the second layer 21 (that is, the upper side of FIG. 4) as in each of the above embodiments. At this time, light irradiates the photo-peelable adhesive layer 17 via the laminate composed of the base material 31, the adhesive layer 33, the current-carrying body 18, the second layer 21, the adhesive layer 34, and the base material 32. Will be done. However, in some cases, the laminate may further have a heat-release adhesive layer 12.
Therefore, it is preferable that the base materials 31, 32, and the adhesive layers 33, 34 constituting the first and second double-sided tape structures 28, 29 all have light transmittance, and more likely to transmit ultraviolet rays. preferable. Further, the heat-peeling adhesive layer 12 also preferably has light transmittance, and more preferably transmits ultraviolet rays. That is, it is preferable that the first and second double-sided tape structures 28 and 29 have light transmission, and more preferably ultraviolet light transmission. The second layer 21 also preferably has light transmission, and more preferably ultraviolet light transmission.
Furthermore, the energizing body 18 also preferably has light transmission, and more preferably ultraviolet light transmission. The energizing body 18 can be made light-transmitting by using a metal oxide or the like as a material constituting the energizing body 18.

As a result, the laminated body consisting of the layers from the second base material 32 to the heat-peeling adhesive layer 12 or the laminated body consisting of the layers from the second base material 32 to the 31st base material 31 transmits light. It is preferable to have a property, and it is preferable to have an ultraviolet ray transmissive property.
That is, in the present invention, a laminate consisting of a layer adjacent to the photo-peeling adhesive layer 17 (second base material 32 in FIG. 4) to the heat-peeling adhesive layer 12 or a photo-peeling type. The laminate consisting of layers from the layer adjacent to the adhesive layer 17 to the layer adjacent to the heat-release adhesive layer 12 on the photo-peelable adhesive layer 17 side (first base material 31 in FIG. 4) is a laminate. It is preferable to have light transmission. The laminated body more preferably has ultraviolet transparency.
The ultraviolet transmittance of the laminated body may be, for example, 0.1% or more, preferably 10% or more, more preferably 20% or more, and for example, 90% or less.

Since the laminated product 30 in the present embodiment has the first and second double-sided tape structures 28 and 29, the first and second double-sided tapes corresponding to the first and second double-sided tape structures 28 and 29 are previously applied. It can be manufactured by simply stacking the first layer, the first double-sided tape, the second layer, and the second double-sided tape in this order. As described above, the laminated product 30 has the double-sided tape structures 28 and 29, which facilitates the manufacture thereof.
As the double-sided tape, commercially available products can be used, and examples thereof include "NWS-TS322F" manufactured by Nitto Denko Corporation and "Selfa" series manufactured by Sekisui Chemical Co., Ltd.

Further, also in the present embodiment, as in the second embodiment, the first layer 11 and the second layer 21 are provided without damaging the adherend, the second layer 21, and the first layer 11. Since it can be easily separated and removed from the adherend, it becomes easy to separate each material, and it becomes easy to recycle each layer of the laminated product 30.

In the fourth embodiment, the first and second adhesive layers 33 and 34 do not have to be of the light or heat peeling type. That is, the first and second adhesive layers 33 and 34 may be non-peelable adhesive layers, and it is not necessary that the adhesive force is lowered by light irradiation or heating so that the adhesive layers can be peeled off.
However, the first and second adhesive layers 33 and 34 may be of a light or heat peeling type. For example, it is preferable that the first adhesive layer 33 is a heat-peeling type adhesive layer and the second adhesive layer is a photo-peeling type adhesive layer. That is, both adhesive layers of the first double-sided tape structure 28 may be of a heat peeling type. Similarly, both adhesive layers of the second double-sided tape structure 29 may be light-peeling type. As described above, when both adhesive layers of the double-sided tape structure are peelable, it becomes easier to separate each material.
Further, in the first double-sided tape structure 28, the first adhesive layer 33, which is a non-peelable adhesive layer, and the light-release adhesive layer 12 may be interchanged. In this case, after energization heating, the laminate composed of the first layer 11 and the first double-sided tape structure 28 may be peeled off from the energization body 18 and the second layer 21.

<Fifth Embodiment>
In the fourth embodiment, the double-sided tape structure is applied when both the heat-release type adhesive layer 12 and the light-release type adhesive layer 17 are provided, but the double-sided tape structure is a laminated product. It may be applied when it does not have the light peeling type adhesive layer 17. A specific example thereof is shown in FIG. 5 as a laminated product 35 according to the fifth embodiment.
In the fifth embodiment, in the laminated product 35, the second layer 21 and the second double-sided tape structure 29 are omitted, and the positions of the heat-release adhesive layer 12 and the adhesive layer 33 are interchanged. It is the same as the laminated body 30 which concerns on 4th Embodiment except that. Hereinafter, the differences in the fourth embodiment will be described and the description thereof will be omitted, which is the same as the fourth embodiment.

Specifically, the laminated product 35 has a laminated structure in which a first layer 11, an adhesive layer 33, a base material 31, a heat-peeling adhesive layer 12, and an energizing body 18 are provided in this order. That is, in the first double-sided tape structure 28, as shown in FIG. 5, the first layer 11 is adhered to the first adhesive layer 33, and the current-carrying body 18 is attached to the surface of the heat-releaseable adhesive layer 12. Is partially provided, and the heat-peelable adhesive layer 12 serves as an adhesive surface.
In the present embodiment, when the energized body 18 is energized and the heat-released adhesive layer 12 is heated, the heat-released adhesive layer 12 is easily separated from the adherend to form a first double-sided tape structure. The 28, the first layer 11, and the energizing body 18 can be easily removed from the adherend.

<Sixth Embodiment>
In the above, in the laminated product having the double-sided tape structure (fourth and fifth embodiments), the energizing body 18 is the side surface (one surface) on which the first layer 11 of the heat-removable adhesive layer 12 is provided. An aspect of being arranged on the other surface 12B side, which is the surface opposite to 12A), is shown. However, even when the laminated product has a double-sided tape structure, the energizing body 18 may be arranged on one surface 12A side of the heat-removable adhesive layer 12, as in the third embodiment. , The first double-sided tape structure 28 (ie, the first adhesive layer 33) and the first layer 11 may be disposed. A specific configuration is shown in FIG. 6 as the laminated product 40 according to the sixth embodiment.

That is, the laminated product 40 includes a first layer 11, an energizing body 18, a heat-release adhesive layer 12, a first base material 31, a first adhesive layer 33, a second layer 21, and a second adhesive. It has a laminated structure in which the agent layer 34, the second base material 32, and the light-release adhesive layer 17 are provided in this order.
Further, also in the sixth embodiment, the energizing body 18 is partially provided on the surface of the first double-sided tape structure 28 (that is, the first adhesive layer 33), and the heat release type adhesive layer 12 is provided. May be adhered to the first layer 11 via the energizing body 18.

Also in the present embodiment, when the energizing body 18 is energized, the heat-released adhesive layer 12 is heated, whereby the heat-released adhesive layer 12 can be peeled off. It is preferable to remove the laminated body of the layer 11 of 1 and the energizing body 18, or the laminated body of the first layer 11, the energizing body 18 and the heat-releaseable adhesive layer 12. Then, after that, the light peeling type adhesive layer 17 can be peeled off by light irradiation, and the remaining portion of the laminated product 40 can be removed from the adherend, whereby the entire laminated product 40 can be removed from the adherend. be.
Therefore, also in the present embodiment, as in the fourth embodiment, the first layer 11 and the second layer 21 can be easily provided without damaging the adherend, the second layer 21, and the first layer 11. Can be separated from the adherend and removed from the adherend. Further, having a double-sided tape structure facilitates its manufacture.

Also in the sixth embodiment, the first and second adhesive layers 33 and 34 do not have to be a light or heat peeling type, and may be a non-peeling type adhesive layer, but a fourth. The peelable adhesive layer may be used as in the above embodiment. Further, in the first double-sided tape structure 28, the first adhesive layer 33, which is a non-peelable adhesive layer, and the heat-removable adhesive layer 12 may be replaced. In this case, after energization heating, for example, the laminate composed of the first layer 11, the energizing body 18, and the first double-sided tape structure 28 may be peeled off from the second layer 21.

<7th Embodiment>
Even when the laminated product 40 has a double-sided tape structure and the energizing body 18 is arranged on one surface 12A side of the heat-releaseable adhesive layer 12, as in the sixth embodiment, the fifth embodiment is performed. Similar to the form, the laminated product may be configured to have no light-release adhesive layer 17. A specific example thereof is shown in FIG. 7 as a laminated product 45 according to the seventh embodiment.
In the seventh embodiment, in the laminated product 45, the second layer 21 and the second double-sided tape structure 29 are omitted, and the positions of the heat-release adhesive layer 12 and the adhesive layer 33 are interchanged. The same is true for the laminated body 40 according to the sixth embodiment, except that the above points are mentioned.

With the above configuration, the laminated product 45 has a laminated structure in which a first layer 11, an energizing body 18, a first adhesive layer 33, a first base material 31, and a heat-releaseable adhesive layer 12 are provided in this order. Has. That is, in the first double-sided tape structure 28, as shown in FIG. 7, the first layer 11 is adhered to the first adhesive layer 33 of the first double-sided tape structure 28 via the energizing body 18. Moreover, the surface of the heat-peeling adhesive layer 12 (the other surface 12B) becomes an adhesive surface to be adhered to the adherend.
Also in this embodiment, when the energized body 18 is energized and the heat-released adhesive layer 12 is heated, the heat-released adhesive layer 12 is separated from the adherend, whereby the laminated product 45 is adhered. It can be removed from the body.

<Other variants>
In the fourth and sixth embodiments, the peelable adhesive layers 12 and 17 each have a structure supported by a base material, and form the first and second double-sided tape structures 28 and 29. , One of the release type adhesive layers 12 and 17 may be supported by the base material, and the other may not be supported. Therefore, in the fourth and sixth embodiments, instead of the first double-sided tape structure 28, the photo-peelable adhesive layer 12 alone may be provided as in the second embodiment. Further, instead of the second double-sided tape structure 29, the light peeling type adhesive layer 17 alone may be provided as in the second embodiment.
Further, in the second, fourth, and sixth embodiments, the laminated structure in which the light peeling type adhesive layer 17 and the heat peeling type adhesive layer 12 are replaced may be provided. That is, the laminated product may have a structure in which the first layer 11, the light-release adhesive layer 17, the second layer 21, and the heat-release adhesive layer 12 are provided in this order. , The heat-peeling adhesive layer 12 constitutes an adhesive surface to be adhered to the adherend. Further, the energizing body 18 is formed between the second layer 21 and the heat-released adhesive layer 12 and the other surface of the heat-released adhesive layer 12 (that is, the surface opposite to the second layer 21 side). ) May be provided above.

In each of the above laminated products, the first layer 11 is shown to be the outermost layer of the laminated product, but the first layer 11 does not have to be the outermost layer, and is further on the first layer 11. A peelable adhesive layer such as a light peelable adhesive layer and another surface layer may be provided in this order.
That is, the release type adhesive layer may be provided in three or more layers. For example, in the second, fourth, and sixth embodiments, the release type adhesive layer or the like is further peeled off on the surface layer 11. By providing the mold adhesive layer and another surface layer in this order, three or more peelable adhesive layers may be provided.

Further, in each of the above embodiments, the energizing body 18 is partially provided on the surface of the heat-removable adhesive layer 12 or the double-sided tape structure 28, but it is not always necessary to be partially provided, for example, a second. As shown in the fourth embodiment, the sixth and the seventh embodiment, it may be provided on the entire surface as long as it is not arranged on the adhesive surface with the adherend.
In such a case, for example, in the second and fourth embodiments, the energizing body 18 may be appropriately adhered to the second layer 21 with an adhesive or the like, and the second layer 21 is a resin sheet. In the case of a foam or the like, it may be adhered to the second layer 21 by the self-adhesive force of the 21st layer 21.
Further, for example, in the third, sixth and seventh embodiments, the energizing body 18 may be appropriately adhered to the first layer 11 with an adhesive or the like, and the first layer 11 is a resin sheet and foamed. In the case of a body or the like, it may be adhered by the self-adhesive force of the first layer 11.
Further, the energizing body 18 is preferably arranged at a position where it comes into contact with the heat-peelable adhesive layer 12, but it is not always necessary to arrange the energizing body 18 at a position where it comes into contact with the heat-peelable adhesive layer 12. The agent layer 12 may be arranged at any position as long as it can be heated so as to be removable.

Further, in each of the above embodiments, when the light peeling type adhesive layer 17 is provided, the laminated product may have a light guide plate. The light guide plate can diffuse the light incident from the end face to the surface thereof, and a known resin light guide film or the like can be used. The light guide plate may be arranged at a position adjacent to or close to the light peeling adhesive layer 17, for example, in the second embodiment, it may be arranged between the second layer 21 and the light peeling adhesive layer 17. Further, in the fourth and sixth embodiments, it may be arranged between the second layer 21 and the second double-sided tape structure 29. Furthermore, in the second, fourth, and sixth embodiments, a light guide plate may be used as the second layer 21.
When the light guide plate is used, the light peeling type adhesive layer 17 can be efficiently irradiated with light, preferably ultraviolet rays, by irradiating the laminated product with light, preferably ultraviolet rays, from the side surface.
Therefore, even if light such as ultraviolet rays is irradiated from the second layer 21 side along the thickness direction, such as when the light transmission of the energizing body 18 is low, the light does not sufficiently reach the light peeling type adhesive layer 17. Effective when not. Further, when the light transmittance of the first layer 11 is low, the second layer 21 can be easily peeled off without peeling off the first layer 11, and there are many variations in how to remove the first layer 11.

The present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.

[Example 1]
A resin sheet as the first layer 11, a first double-sided tape for forming the first double-sided tape structure 28, an energizing body 18 having a drawer electrode portion 19, a foam as a second layer 21, and a second layer. The second double-sided tape for forming the double-sided tape structure 29 of 2 was laminated in this order to obtain the laminated product shown in FIG.
The materials used in Example 1 were as follows.
Resin sheet: 80 parts by mass of Mitsui Chemicals TPO resin "8030N", 10 parts by mass of Prime Polymer PP resin "E333GV", 10 parts by mass of Prime Polymer LLDPE "20100J", 0.3 mass of BASF "Irganox 1010" Parts and 0.2 parts by mass of the black pigment "PEX999018" manufactured by Tokyo Ink Co., Ltd. were kneaded and melt-extruded. A 0.5 mm thick sheet obtained by embossing the melt-extruded resin composition with an embossed roll was used as a resin sheet.
First double-sided tape: A tape composed of a heat-release adhesive layer containing "Advancel EMH204" manufactured by Sekisui Chemical Co., Ltd. on one side of a 12 μm polyester film, one side of which is a normal pressure-sensitive adhesive layer, and the other side of which is a heat-release type pressure-sensitive adhesive layer.
Energizing body: (Manufactured by Three High Co., Ltd., product name "silicon rubber heater")
Foam: Cross-linked polyolefin foam "Softlon SP" manufactured by Sekisui Chemical Co., Ltd., foam magnification 15 times, closed cell ratio 98%, cross-linking degree 32%, thickness 2 mm, ultraviolet transmittance 3.8%
Second double-sided tape: Product name "Selfa HW-01", manufactured by Sekisui Chemical Co., Ltd., thickness 119 μm. Double-sided tape provided with a photo-peelable adhesive layer that is peeled off when irradiated with ultraviolet rays on both sides of the base material.

The obtained laminated product was attached to an easily adhesive-treated polypropylene resin plate as an adherend using a second double-sided tape. In the laminated product attached to the adherend, an electric current was passed through the current-carrying body to heat the first double-sided tape to 150 ° C. Then, when the temperature was returned to room temperature and the first layer was manually peeled off from the first double-sided tape, the first layer could be peeled off without any problem.
Then, using a high-pressure mercury UV irradiation device, ultraviolet rays having a wavelength of 365 nm were irradiated from the second layer side at an irradiation dose of 3000 mJ / cm ² . Then, when the temperature was returned to room temperature and the rest of the laminated product was manually peeled off from the adherend, the foam which was the second layer could be peeled off without being damaged. In addition, the second double-sided tape itself could be peeled off from the adherend without any problem.

[Comparative Example 1]
As the adhesion of the first and second layers, instead of the first double-sided tape, a hot melt adhesive "RU-605T" manufactured by MORESCO, which does not have a release type adhesive layer, was used, and the lamination of the current-carrying body was used. The same procedure as in Example 1 was carried out except that the above was omitted.
The obtained laminated product was attached to an easily adhesive-treated polypropylene resin plate as an adherend using a second double-sided tape. After that, an attempt was made to manually peel off the first layer from the second layer, but the first layer could not be peeled off and the foam was damaged.

10, 20, 25, 30, 35, 40, 45 Laminated product 11 First layer 12 Thermal peeling adhesive layer 12A One side 12B The other side 17 Optical peeling adhesive layer 18 Energizer 19 Pull-out electrode part 21 Second layer 28 First double-sided tape structure 29 Second double-sided tape structure 31 First base material 32 Second base material 33 First adhesive layer 34 Second adhesive layer

Claims (10)

A heat-removable adhesive layer that can be peeled off by heating,
The first layer provided on one surface side of the heat-peeling adhesive layer and
An energized body that can heat the heat-released adhesive layer by being energized,
Laminated product to prepare. The laminated product according to claim 1, wherein the extraction electrode portion is connected to the energized body. The laminated product according to claim 1 or 2, wherein the first layer is at least one selected from the group consisting of a foam, a resin layer, a cloth, leather, and a metal layer. Any one of claims 1 to 3, wherein the energizing body is provided on the other surface side of the heat-removable adhesive layer, or is arranged between the first layer and the heat-removable adhesive layer. The laminated product according to item 1. The first double-sided tape structure having the heat-release adhesive layer is provided.
The first layer is provided on one side of the first double-sided tape structure.
Any of claims 1 to 4, wherein the energizing body is provided on the other side of the first double-sided tape structure, or is arranged between the first layer and the first double-sided tape structure. The laminated product according to item 1. It is provided with a light peeling type adhesive layer that can be peeled off by light irradiation and a second layer.
The laminated product according to any one of claims 1 to 5, wherein at least the first layer, the heat-peeling adhesive layer, the second layer, and the photo-peeling adhesive layer are provided in this order. The laminated product according to claim 6, further comprising a second double-sided tape structure having the light-release adhesive layer. The laminate according to claim 6 or 7, wherein the second layer is at least one selected from the group consisting of a foam, a resin layer, a fabric, a leather, and a metal layer. The laminated product according to claim 8, wherein the first layer is at least one selected from the group consisting of a resin layer, a cloth, leather, and a metal layer, and the second layer is a foam. The laminated product according to any one of claims 1 to 9, which is an automobile interior material.

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