Adhesive sheet, method for manufacturing an adhesive sheet, method for manufacturing a design product

Abstract

This invention provides an adhesive sheet, a method for manufacturing an adhesive sheet, and a method for manufacturing a decorative product, which can be applied not only to glass and plastic but also to various fabrics through heat processing, have a good texture, and are resistant to peeling even after repeated washing. [Solution] An adhesive sheet comprising a release sheet, an adhesive layer provided on the release sheet and containing an adhesive, a thermoplastic resin layer provided on the adhesive layer, and a support layer provided on the thermoplastic resin layer, wherein the adhesive is not thermosetting.

Description

Technical Field

[0001] The present invention relates to an adhesive sheet, a method for manufacturing an adhesive sheet, and a method for manufacturing a designed product. More specifically, the present invention is applicable not only to glass and plastic as application sites, but also to various fabrics and the like by heat processing, and relates to an adhesive sheet, a method for manufacturing an adhesive sheet, and a method for manufacturing a designed product that has a good texture and is difficult to peel off even after repeated washing.

Background Art

[0002] Conventionally, using a thermosetting adhesive composition, products such as cloth products that apply a film to fabrics such as kimonos to protect the surface of the fabric have been developed (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the cloth product described in Patent Document 1 uses a thermosetting adhesive, the texture of the cloth product after curing is likely to be inferior. Also, the application site is likely to be limited to fabrics such as cloth and cannot be applied to various application sites (for example, glass, plastic, etc.).

[0005] The present invention has been made in view of such conventional problems, and an object thereof is to provide an adhesive sheet, a method for manufacturing an adhesive sheet, and a method for manufacturing a designed product that are applicable not only to glass and plastic as application sites, but also to various fabrics and the like by heat processing, have a good texture, and are difficult to peel off even after repeated washing.

Means for Solving the Problems

[0006] The adhesive sheet, method for manufacturing the adhesive sheet, and method for manufacturing the design product of the present invention, which solve the above problems, mainly include the following components.

[0007] (1) An adhesive sheet comprising a release sheet, an adhesive layer provided on the release sheet and containing an adhesive, a thermoplastic resin layer provided on the adhesive layer, and a support layer provided on the thermoplastic resin layer, wherein the adhesive is not thermosetting.

[0008] With this configuration, the adhesive sheet can be attached to surfaces such as glass and plastic. Furthermore, by heat processing, the adhesive sheet can also be attached to various fabrics. The adhesive sheet uses a non-heat-curing adhesive, maintaining its texture even after application and heat processing, and resisting peeling even after repeated washing.

[0009] (2) The adhesive sheet according to (1), wherein a receiving layer is provided on the support layer.

[0010] With this configuration, the adhesive sheet can be given various designs to the application area.

[0011] (3) The adhesive sheet according to (2), wherein a design layer is further provided on the receiving layer.

[0012] With this configuration, the adhesive sheet can be given various designs to the application area by, for example, inkjet printing.

[0013] (4) The support layer is an adhesive sheet according to any one of (1) to (3), which contains a water-repellent powder.

[0014] With this configuration, the adhesive sheet is less likely to peel off even after repeated washing.

[0015] (5) The adhesive layer is an adhesive sheet according to any one of (1) to (4), comprising a hydrophobic additive.

[0016] With this configuration, the adhesive sheet is less likely to peel off even after repeated washing.

[0017] (6) A method for manufacturing an adhesive sheet, comprising the steps of: providing a support layer and a thermoplastic resin layer in order on a first release sheet; applying a non-thermosetting adhesive to a second release sheet to form an adhesive layer; bonding the thermoplastic resin layer and the adhesive layer together so that they are in contact; and peeling off the first release sheet.

[0018] With this configuration, the resulting adhesive sheet can be attached to surfaces such as glass and plastic. Furthermore, the resulting adhesive sheet can be attached to various fabrics by heat processing. The resulting adhesive sheet uses a non-heat-curing adhesive, and even after being attached to a surface, it maintains a good texture and is resistant to peeling even after repeated washing.

[0019] (7) A method for manufacturing an adhesive sheet according to (6), wherein a receiving layer is provided on the first release sheet, and then the support layer and the thermoplastic resin layer are provided in order.

[0020] With this configuration, the adhesive sheet can be given various designs to the application area.

[0021] (8) A method for manufacturing a design product, comprising the steps of peeling the release sheet from the adhesive sheet described in (1) or (2), and attaching the exposed adhesive layer to an application location.

[0022] With this configuration, the resulting decorative product can be made of glass, plastic, etc. Furthermore, the resulting decorative product can be made of various fabrics, etc. The resulting decorative product uses a non-heat-curing adhesive, has a good texture, and the adhesive sheet portion is resistant to peeling even after repeated washing.

[0023] (9) After pasting the exposed adhesive layer onto the application site, heat and pressure are applied to evaporate the solvent from the adhesive of the adhesive layer and to thermally melt the thermoplastic resin layer, followed by a step of pasting onto the application site, the method for manufacturing the design product according to (8).

[0024] According to such a configuration, various fabrics and the like can be used for the obtained design product. In the obtained design product, a non-thermosetting adhesive is used, resulting in a good texture and the adhesive sheet portion being difficult to peel off even after repeated washing.

Effects of the Invention

[0025] According to the present invention, not only glass and plastic but also various fabrics and the like can be applied by thermal processing as the application site, and an adhesive sheet, a method for manufacturing the adhesive sheet, and a method for manufacturing a design product can be provided that have a good texture and are difficult to peel off even after repeated washing.

Brief Description of the Drawings

[0026] [Figure 1] FIG. 1 is a schematic diagram of a sheet after performing the first step of an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of a sheet after performing the third step of an embodiment of the present invention. [Figure 3] FIG. 3 is a schematic diagram of a sheet after performing the fourth step of an embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram for explaining a state where an adhesive sheet of an embodiment of the present invention is pasted onto an application site. [Figure 5] FIG. 5 is a schematic diagram for explaining a state where an adhesive sheet of an embodiment of the present invention is pasted onto an application site by thermal processing.

Modes for Carrying Out the Invention

[0027] For the sake of clarity of explanation, the method for manufacturing the adhesive sheet will be described first.

[0028] <Method for manufacturing adhesive sheets> A method for manufacturing an adhesive sheet according to one embodiment of the present invention includes the steps of: providing a support layer and a thermoplastic resin layer in order on a first release sheet (first step); applying a non-thermosetting adhesive to a second release sheet to form an adhesive layer (second step); bonding the thermoplastic resin layer and the adhesive layer together so that they are in contact (third step); and peeling off the first release sheet (fourth step). Each of these steps will be described below. Note that the order of the first and second steps is not important, and either one may be performed first, or they may be performed simultaneously. In this embodiment, thermosetting refers to the property of becoming insoluble and infusible by forming a three-dimensional network structure through a chemical reaction (crosslinking reaction) caused by heating. That is, the adhesive sheet of this embodiment does not have such thermosetting properties and does not harden when heated.

[0029] (1st step) The first step is to sequentially provide a support layer and a thermoplastic resin layer on the first release sheet. Alternatively, in the first step, a receiving layer may be provided on the first release sheet before the support layer and thermoplastic resin layer are provided in sequence. This allows the adhesive sheet to be given various designs at the application location.

[0030] The first release sheet is not particularly limited. For example, the first release sheet can be various release films. Examples of release films include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polyethylene naphthalate film, polybutylene terephthalate film, polyurethane film, ethylene vinyl acetate copolymer film, ionomer resin film, ethylene-(meth)acrylic acid copolymer film, ethylene-(meth)acrylic acid ester copolymer film, polystyrene film, polycarbonate film, polyimide film, fluororesin film, etc. The first release sheet may also be release paper.

[0031] The first release sheet may be a resin film or the like with a release treatment applied to its surface, such as silicone coating.

[0032] A support layer is provided on the first release sheet. The support layer may be formed directly on the first release sheet, or it may be provided on the design layer (including the receiving layer) after the design layer (described later) has been provided.

[0033] The supporting layer is not particularly limited. For example, the supporting layer may be a resin sheet, rubber sheet, foam sheet, etc. Examples of resin sheets include polyolefin resin sheets such as polyethylene (PE), polypropylene (PP), and ethylene-propylene copolymer; polyester resin sheets such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN); vinyl chloride resin sheets; vinyl acetate resin sheets; polyimide resin sheets; polyamide resin sheets; fluororesin sheets; cellophane; etc. Examples of rubber sheets include natural rubber sheets and butyl rubber sheets. Examples of foam sheets include foamed polyolefin sheets such as foamed PE sheets, foamed polyester sheets, foamed polyurethane sheets, and foamed polychloroprene rubber sheets.

[0034] The support layer may be colored by adding various pigments. Examples of pigments include titanium dioxide, zinc oxide, inorganic fillers such as silica, alumina, clay, talc, calcium carbonate, or barium sulfate, and resin particles (plastic pigments) such as acrylic resin, epoxy resin, polyurethane resin, phenolic resin, melamine resin, benzoguanamine resin, fluororesin, or silicone resin. If the pigment includes a white pigment, the clarity of the characters or designs formed when the design layer described later is formed may be enhanced.

[0035] The support layer in this embodiment preferably contains a water-repellent powder. The water-repellent powder is a powder that is blended to impart water repellency to the support layer.

[0036] The water-repellent powder is not particularly limited. Examples include phosphorescent powder, glass powder, and metal powder.

[0037] Phosphorescent powders are powders that absorb and temporarily store light energy, and then gradually release that energy as phosphorescence. Phosphorescent powders are not particularly limited. For example, phosphorescent powders include sulfide phosphors such as potassium sulfide, zinc sulfide, and zinc cadmium sulfide, and aluminate phosphors containing strontium, europium, and dysprosium. As for aluminate phosphors, among the compounds represented as MAl2O4, the parent crystal is a compound in which M is at least one metal element selected from the group consisting of calcium, strontium, and barium, and preferably contains europium, cerium, praseodymium, neodymium, samarium, terbium, cisprosium, holmium, erbium, thulium, ytterbium, lutetium, etc. as activators.

[0038] The glass powder is not particularly limited. Examples include soda-lime glass powder, borosilicate glass powder, aluminosilicate glass powder, lead glass powder (lead silicate), phosphate glass powder (phosphate glass), and fluoride glass powder.

[0039] The metal powder is not particularly limited. Examples include pure iron powder, alloy steel powder, stainless steel powder, copper powder, brass powder, bronze powder, aluminum powder, magnesium powder, nickel powder, cobalt powder, titanium powder, tungsten powder, molybdenum powder, silver powder, gold powder, zinc powder, etc.

[0040] Returning to the general explanation of water-repellent powders, the average particle size of the water-repellent powder is not particularly limited. For example, the average particle size of the water-repellent powder is preferably 1 μm or more, and more preferably 10 μm or more. Furthermore, the average particle size of the water-repellent powder is preferably 80 μm or less, and more preferably 40 μm or less. When the average particle size of the water-repellent powder is within the above range, the adhesive sheet exhibits good water repellency in the support layer and is less likely to peel off even after repeated washing. The average particle size of the water-repellent powder is the 50% mean particle size (D50), which can be calculated by measuring it using, for example, SLD-3100 (manufactured by Shimadzu Corporation).

[0041] The content of the water-repellent powder is not particularly limited. For example, the content of the water-repellent powder in the support layer is preferably 5% by mass or more, and more preferably 8% by mass or more. Furthermore, the content of the water-repellent powder in the support layer is preferably 60% by mass or less, and more preferably 40% by mass or less. When the content of the water-repellent powder is within the above range, the adhesive sheet exhibits good water repellency in the support layer and is less likely to peel off even after repeated washing.

[0042] The support layer can be formed by applying and drying a resin solution or the like that constitutes the support layer. If the support layer contains water-repellent powder, the water-repellent powder should be blended into the resin solution or the like that constitutes the support layer. The application of the resin solution or the like can be carried out by known methods, such as general-purpose printing methods like gravure printing, offset printing, or screen printing, or a roll coater method.

[0043] The thickness of the support layer is not particularly limited. For example, the thickness of the support layer (after drying) is preferably 10 to 100 μm, and more preferably 20 to 50 μm.

[0044] A thermoplastic resin layer is provided on the support layer.

[0045] The thermoplastic resin constituting the thermoplastic resin layer is not particularly limited. For example, thermoplastic resins include acrylic resin, styrene resin, cellulose resin, vinyl chloride resin, ethylene vinyl acetate copolymer, vinyl acetate resin (a copolymer of vinyl chloride and vinyl acetate), polyethylene, polypropylene, polyester, or polyvinyl alcohol.

[0046] The thermoplastic resin layer of this embodiment may be composed of a thermoplastic elastomer. The thermoplastic elastomer is not particularly limited. For example, thermoplastic elastomers include styrene-based thermoplastic elastomers (SBS, SEBS, SIS), olefin-based thermoplastic elastomers (TPO), polyurethane-based thermoplastic elastomers (TPU), polyester-based thermoplastic elastomers (TPE-E), cross-linked olefin-based thermoplastic elastomers (TPE-V), polyamide-based thermoplastic elastomers (TPE-A), etc. Among these, the thermoplastic resin is preferably one that exhibits adhesiveness at room temperature and can be melted by heating (e.g., 100°C) and pressurizing with an iron or the like. Because the thermoplastic resin layer is composed of a thermoplastic elastomer, the adhesive sheet can easily expand and contract in accordance with the expansion and contraction of the application area (e.g., fabric, etc.) and is less likely to peel off.

[0047] The thickness of the thermoplastic resin layer is not particularly limited. For example, the thickness of the thermoplastic resin layer (after drying) is preferably 10 to 100 μm, and more preferably 20 to 80 μm.

[0048] A thermoplastic resin layer can be formed by applying and drying a resin solution (or elastomer solution) that constitutes the thermoplastic resin layer. The application can be carried out by known methods, such as general-purpose printing methods like gravure printing, offset printing, or screen printing, or a roll coater method.

[0049] In addition, in the first step described above, a receiving layer may be provided on the first release sheet, followed by the support layer and the thermoplastic resin layer in that order. As a result, in the fourth step, the first release sheet is peeled off, exposing the receiving layer of the adhesive sheet.

[0050] The receiving layer is a layer provided on the support layer and is preferably provided for providing the design layer (e.g., an inkjet printing layer) described later. For example, when the design layer is provided by inkjet printing, the receiving layer is provided to quickly absorb the applied inkjet composition, prevent bleeding, improve color development, and enhance fixation. As a result, the adhesive sheet can be given various designs to the application area.

[0051] The receiving layer is not particularly limited. For example, the receiving layer can be formed by applying a receiving layer solution containing various resins such as acrylic resins, cellulose resins, and urethane resins, as well as a leveling agent, and drying it as appropriate.

[0052] The thickness of the receiving layer is not particularly limited. For example, the thickness of the receiving layer (after drying) is preferably 5 to 50 μm, and more preferably 10 to 30 μm.

[0053] A design layer may be formed on the exposed receiving layer. Therefore, the adhesive sheet can be given various designs to the application area. However, if various designs such as letters or patterns can be formed directly on the support layer, the receiving layer may be omitted.

[0054] The design layer is not particularly limited. The design layer is a layer on which various designs, such as letters or patterns, are printed using various ink compositions or paint compositions.

[0055] If a design layer is formed, its thickness is not particularly limited. For example, the thickness of the design layer (after drying) is preferably 0.1 to 20 μm, and more preferably 0.5 to 10 μm.

[0056] Figure 1 is a schematic diagram of a sheet after the first step of this embodiment. According to the first step, an arbitrary receiving layer 2, a support layer 3, and a thermoplastic resin layer 4 are provided in order on the first release sheet 1.

[0057] (2nd process) The second step is to apply a non-thermosetting adhesive to the second release sheet to form an adhesive layer.

[0058] The second release sheet may be the same as the first release sheet described above. An adhesive is applied to the second release sheet.

[0059] The adhesive is not particularly limited. The adhesive may be a water-based adhesive or a solvent-based adhesive. For example, the adhesive is an emulsion solution containing various rubber-like polymers such as acrylic polymers, rubber polymers (natural rubber, synthetic rubber, mixtures thereof, etc.), polyester polymers, urethane polymers, polyether polymers, silicone polymers, polyamide polymers, and fluorine polymers as base polymers (main components). From the viewpoint of adhesive performance and cost, adhesives containing water-soluble acrylic polymers or rubber polymers as base polymers are preferred.

[0060] Water-soluble acrylic polymers are polymers obtained by polymerizing monomers containing (meth)acryloyl groups that have water-soluble functional groups (hydrophilic groups), and exhibit tackiness when incorporated into an adhesive layer with water. Examples of water-soluble (meth)acrylic polymers include homopolymers such as polyacrylic acid and its neutralized form; and copolymers such as sodium acrylate-N-vinylacetamide copolymers.

[0061] The weight-average molecular weight of the adhesive is not particularly limited. For example, the weight-average molecular weight of the adhesive is preferably 200,000 or more, and more preferably 300,000 or more. Furthermore, the weight-average molecular weight of the adhesive is preferably 1,000,000 or less, and more preferably 700,000 or less. By having the weight-average molecular weight of the adhesive within the above range, the adhesive sheet becomes less likely to peel off even after repeated washing.

[0062] Furthermore, the adhesive in this embodiment does not harden at room temperature or after heating and pressurizing, and retains its adhesive properties. In other words, the adhesive sheet of this embodiment is different from conventional sheets containing thermosetting resin adhesives. As will be described later, such an adhesive sheet can be attached to application areas (glass, various plastic products, etc.) even at room temperature, and can also be attached to application areas (various fabrics, etc.) by heating and pressurizing.

[0063] The fabric is not particularly limited. For example, the fabric could be used for various panel products, apparel products, clothing, etc.

[0064] The adhesive layer of this embodiment preferably contains a hydrophobic additive. The hydrophobic additive is added to impart water repellency to the adhesive layer.

[0065] The hydrophobic additive is not particularly limited. For example, the hydrophobic additive may be selected from the group consisting of silica, titania, alumina, pulverized quartz, magnesium oxide, zinc oxide, salts of aliphatic carboxylic acids (e.g., calcium stearate or aluminum stearate), and reaction products of isocyanates with certain cyclohexylamines and alkylamides (e.g., ethylenebisstearamide or methylenebisstearamide).

[0066] The average particle size of the hydrophobic additive is not particularly limited. For example, the average particle size of the hydrophobic additive is preferably 1 μm or more, and more preferably 3 μm or more. Furthermore, the average particle size of the hydrophobic additive is preferably 10 μm or less, and more preferably 5 μm or less. When the average particle size of the hydrophobic additive is within the above range, the adhesive sheet exhibits good water repellency in the adhesive layer and is less likely to peel off even after repeated washing. The average particle size of the hydrophobic additive is the 50% mean particle size (D50), which can be calculated by measuring it using, for example, SLD-3100 (manufactured by Shimadzu Corporation).

[0067] The content of the hydrophobic additive is not particularly limited. For example, the content of the hydrophobic additive in the adhesive layer is preferably 1% by mass or more, and more preferably 3% by mass or more. Furthermore, the content of the hydrophobic additive in the adhesive layer is preferably 10% by mass or less, and more preferably 5% by mass or less. When the content of the hydrophobic additive is within the above range, the adhesive sheet exhibits good water repellency in the adhesive layer and is less likely to peel off even after repeated washing.

[0068] The adhesive layer can be formed by applying an adhesive solution onto a second release sheet and drying it as appropriate. If the adhesive layer contains a hydrophobic additive, the hydrophobic additive should be incorporated into the adhesive solution or the like that constitutes the adhesive layer. The application of the adhesive solution or the like can be carried out by known methods, such as general-purpose printing methods like gravure printing, offset printing, or screen printing, or a roll coater method.

[0069] In the adhesive layer, the amount of the adhesive (calculated as solid content in the emulsion) is preferably 1 to 80% by mass, and can be 3 to 60% by mass.

[0070] The thickness of the adhesive layer is not particularly limited. For example, the thickness of the adhesive layer is preferably 10 to 60 μm, and more preferably 10 to 50 μm.

[0071] (3rd step) The third step is to bond the thermoplastic resin layer and the adhesive layer together so that they are in contact. The thermoplastic resin layer of the first release sheet and the adhesive layer of the second release sheet are bonded together. The bonding method is not particularly limited. For example, the bonding may be done by hand by an operator, or it may be done using various coaters.

[0072] Figure 2 is a schematic diagram of the sheet after the third step of this embodiment. According to the second step described above, an adhesive layer 6 is provided on the second release sheet 5. Furthermore, according to the third step, the thermoplastic resin layer 4 and the adhesive layer 6 are bonded together so that they are in contact.

[0073] (4th step) The fourth step is to peel off the first release sheet. Figure 3 is a schematic diagram of the sheet (adhesive sheet A) after the fourth step of this embodiment. According to the fourth step, the first release sheet 1 (see Figure 2) is peeled off, exposing the support layer 3 on which an arbitrary receiving layer 2 is formed. As a result, the adhesive sheet A of this embodiment is obtained, which includes a release sheet (second release sheet 5), an adhesive layer 6 provided on the second release sheet 5, a thermoplastic resin layer 4 provided on the adhesive layer 6, a support layer 3 provided on the thermoplastic resin layer 4, and an arbitrary receiving layer 2, wherein the adhesive layer 6 is made of an adhesive.

[0074] The resulting adhesive sheet can be attached to application areas such as glass or plastic. Figure 4 is a schematic diagram illustrating the state in which the adhesive sheet A of this embodiment is attached to an application area. That is, by peeling off the second release sheet 5 (see Figure 3), the adhesive layer 6 of the adhesive sheet A is exposed. By attaching the sheet so that the exposed adhesive layer 6 is in contact with the application area P1 such as glass or plastic, the adhesive sheet A of this embodiment can be attached to the application area.

[0075] In this embodiment, if the adhesive sheet is large in size, or if the design layer has fine designs or scattered patterns, the design may be transferred to an application sheet first, and then the sheet may be applied to the application area. The application sheet is not particularly limited. For example, the application sheet may be made of paper, polypropylene (including OPP), PET, etc. It is preferable that the application sheet used in this case has adhesive properties on its surface. Therefore, the adhesive sheet attached to the application sheet is applied to the application area after the second release sheet has been peeled off, using a squeegee or the like to remove air as appropriate.

[0076] By applying the adhesive sheet to the application area, various decorative products can be obtained. The resulting decorative products use a non-heat-curing adhesive and have a pleasant texture.

[0077] Furthermore, the resulting adhesive sheet A can be attached to various fabrics by heat processing. Figure 5 is a schematic diagram illustrating the state in which the adhesive sheet A of this embodiment is attached to an application area by heat processing. Specifically, the adhesive layer 6 of the adhesive sheet A is exposed by peeling off the second release sheet 5 (see Figure 3). The exposed adhesive layer 6 is then attached so that it is in contact with the application area P2 of the fabric or other material. As described above, if the adhesive sheet is large in size, or if the design layer has fine designs or scattered patterns, the design may be transferred to an application sheet first, and then attached to the application area.

[0078] Next, the adhesive sheet is heated and pressurized. The method of heating and pressurizing is not particularly limited. For example, the adhesive sheet is covered with a protective sheet (e.g., release paper or cloth, not shown) so as to cover the support layer (and any design layer or receiving layer), and then heated and pressurized to over 100°C using an iron or the like. As a result, the solvent (water or solvent, etc.) of the adhesive in the adhesive layer evaporates, and the thermoplastic resin layer melts due to the heat. As a result, a heat-melted layer 7 is formed in which the adhesive layer and the thermoplastic resin layer are integrated. As described above, an adhesive that does not harden at heat is used. Therefore, the heat-melted layer 7 has enhanced adhesive strength and melts into the application area as appropriate, exhibiting strong adhesion.

[0079] In this embodiment, as described above, the adhesive layer is included in the adhesive sheet itself. Therefore, when heating and pressurizing, it is not necessary to use expensive application sheets (for example, application sheets made of PET or PTFE) that have adhesive properties and heat resistance, as is the case with conventional application sheets. As a result, in this embodiment, as described above, any design can be attached to the application area, such as fabric, using less expensive paper or cloth. Conventional expensive application sheets accounted for a large proportion of the manufacturing cost of design products. However, paper and cloth cost less than half the price of conventional PET or PTFE application sheets. Therefore, according to this embodiment, design products can be manufactured at a lower cost than before.

[0080] Note that the thickness of the adhesive sheet after heating and pressurizing will be about 30% thinner than before heating and pressurizing.

[0081] Furthermore, when adhesive sheet A is attached to an application area P2 such as fabric, heating is not essential. That is, by heating adhesive sheet A, a heat-melted layer 7 is formed in which the adhesive layer and the thermoplastic resin layer are integrated, allowing it to adhere more firmly to the application area P2 such as fabric. On the other hand, adhesive sheet A can adhere to the application area P2 by the adhesive layer 6 even by simply applying pressure without heating. Therefore, the presence or absence and conditions of heating should be adjusted as appropriate based on the desired adhesive strength, compatibility with the application area P2, and the thickness and composition of the adhesive layer 6. When heating is not performed, it is preferable that the adhesive constituting the adhesive layer be a water-based adhesive.

[0082] Thus, even when the resulting adhesive sheet is heat-treated for application, the adhesive layer does not harden, and it maintains a good texture even after being applied to the application area. Furthermore, the resulting decorative product is resistant to peeling even after repeated washing. Specifically, adhesive sheets applied to synthetic resin fabrics such as polyester, Tetron, and nylon do not peel off even after multiple washes and drying cycles at bath temperatures of around 40°C.

[0083] More specifically, the adhesive sheet of this embodiment can withstand the C-type test method of the practical machine test method (JIS L 1930), including C4G (washing (water temperature 40±3℃, washing time 3 minutes, spin-drying time 3 minutes), rinse 1 (rinsing time 2 minutes, spin-drying time 3 minutes), rinse 2 (rinsing time 2 minutes, spin-drying time 1 minute or less)), C4M (washing (water temperature 40±3℃, washing time 6 minutes, spin-drying time 3 minutes), rinse 1 (rinsing time 2 minutes, spin-drying time 3 minutes), rinse 2 (rinsing time 2 minutes, spin-drying time 3 minutes)), and C4N (washing (water temperature 40±3℃, washing time 15 minutes, spin-drying time 3 minutes), rinse 1 (rinsing time 2 minutes, spin-drying time 3 minutes), rinse 2 (rinsing time 2 minutes, spin-drying time 7 minutes)). [Examples]

[0084] The present invention will be described more specifically below with reference to examples. The present invention is not limited in any way to these examples.

[0085] (Example 1) A 20 μm thick receiving layer made of urethane resin was placed on a first release sheet made of polyethylene, followed by a 30 μm thick support layer made of polyethylene terephthalate and a 30 μm thick thermoplastic resin layer made of acrylic resin. Separately, an adhesive made of acrylic polymer was applied to a second release sheet made of polyethylene to form an adhesive layer 30 μm thick. The first release sheet was peeled off, and the thermoplastic resin layers and adhesive layers of each sheet were bonded together so that they were in contact, thereby creating an adhesive sheet.

[0086] Using the obtained adhesive sheets, design products 1 to 4 were manufactured by the following method.

[0087] (Design product 1: No heating or pressurization) The second release sheet of the adhesive sheet from Example 1 was peeled off to expose the adhesive layer. The adhesive layer was pressed by hand onto a cotton fabric to attach the adhesive sheet to the fabric and create design product 1.

[0088] (Design product 2: No heating or pressurization) The second release sheet of the adhesive sheet from Example 1 was peeled off to expose the adhesive layer. The adhesive layer was pressed by hand onto a polyester fabric to attach the adhesive sheet to the fabric and create design product 2.

[0089] (Design product 3: Heating and pressurizing involved) The second release sheet of the adhesive sheet from Example 1 was peeled off to expose the adhesive layer. The adhesive layer was placed on a cotton fabric, and the sheet was heated and pressed with an iron at 140-150°C for 10 seconds to adhere it to the fabric, thereby creating design product 3.

[0090] (Design product 4: Heating and pressurizing involved) The second release sheet of the adhesive sheet from Example 1 was peeled off to expose the adhesive layer. The adhesive layer was placed on a polyester fabric and heated and pressed with an iron at 140-150°C for 10 seconds to adhere the adhesive sheet to the fabric, thereby creating design product 4.

[0091] Wash resistance tests were conducted on the obtained design products 1 to 4 using the following method.

[0092] (Wash resistance test) The C4G test method of the Type C test method in the practical machine test method (JIS L 1930) (washing (water temperature 40±3℃, washing time 3 minutes, spin-drying time 3 minutes), rinse 1 (rinse time 2 minutes, spin-drying time 3 minutes), rinse 2 (rinse time 2 minutes, spin-drying time 1 minute or less)) is repeated, and the number of times until peeling is observed is calculated.

[0093] The results of the above wash resistance test showed that the adhesive sheet of design product 1 could withstand 3 washes and peeled off after the 4th wash. The adhesive sheet of design product 2 showed no noticeable abnormalities and did not peel off even after 10 washes. The adhesive sheets of design products 3 and 4 showed no noticeable abnormalities and did not peel off even after 10 washes. [Explanation of Symbols]

[0094] 1. First release sheet 2 Acceptance layer 3 Support layer 4 Thermoplastic resin layer 5. Second release sheet 6 Adhesive layer 7. Thermal melting layer A Adhesive Sheet P1, P2 Applicable locations

Claims

1. It includes a release sheet, an adhesive layer provided on the release sheet and containing an adhesive, a thermoplastic resin layer provided on the adhesive layer, and a support layer provided on the thermoplastic resin layer, A receiving layer is provided on the support layer, The thermoplastic resin layer comprises an acrylic resin or a thermoplastic elastomer. The adhesive layer contains an acrylic polymer, The receiving layer contains an acrylic resin, The aforementioned adhesive does not have thermosetting properties. An adhesive sheet used by being attached to fabric.

2. The adhesive sheet according to claim 1, wherein a design layer is further provided on the receiving layer.

3. The support layer comprises a water-repellent powder, as described in claim 1 or 2, in the adhesive sheet.

4. The adhesive sheet according to claim 1 or 2, wherein the adhesive layer contains a hydrophobic additive.

5. A step of sequentially providing a receiving layer, a support layer, and a thermoplastic resin layer on a first release sheet, A step of applying a non-thermosetting adhesive to a second release sheet to form an adhesive layer, A step of bonding the thermoplastic resin layer and the adhesive layer so that they are in contact, The step includes peeling off the first release sheet, The thermoplastic resin layer comprises an acrylic resin or a thermoplastic elastomer. The adhesive layer contains an acrylic polymer, The receiving layer contains an acrylic resin, A method for manufacturing adhesive sheets for use by attaching them to fabric.

6. A step of peeling the release sheet from the adhesive sheet according to claim 1 or 2, A method for manufacturing a design product, comprising the step of attaching the exposed adhesive layer to an application location.

7. A method for manufacturing a design product according to claim 6, comprising the steps of: attaching the exposed adhesive layer to the application location; then heating and pressurizing the adhesive layer to evaporate the solvent from the adhesive and to thermally melt the thermoplastic resin layer to attach it to the application location.

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