Decorative sheet and mobile body

Abstract

To make positioning of a decorative sheet easier.SOLUTION: A decorative sheet 20 is used for an exterior body of a mobile body 1. The decorative sheet 20 comprises a decorative layer 23 and a joint layer 25 laminated on the decorative layer 23. Adhesive force between the joint layer 25 and an adherend 11 in peeling off the joint layer 25 in 180° direction to the adherend 11 after bringing the joint layer 25 of the decorative sheet 20 in contact with the adherend 11 in an environment of 23°C is 0.02 N / inch or less. Adhesive force between the joint layer 25 and the adherend 11 in peeling off the joint layer 25 in 180° direction to the adherend 11 in an environment of 23°C after press-bonding the joint layer 25 of the decorative sheet 20 to the adherend 11 by a 2 kg roller while heating to 80°C is 7.0 N / inch or more.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a decorative sheet and a moving body.

Background Art

[0002] The exterior of a moving body such as an automobile is painted with paint. By painting the exterior with paint, the moving body exhibits an excellent appearance.

[0003] In the process of painting with paint, volatile organic compounds contained in the paint and carbon dioxide are indirectly emitted due to the energy consumption in the drying process. When painting the exterior of a large moving body such as an automobile with paint, a large amount of volatile organic compounds and carbon dioxide are generated. In recent years, concern for the environment has been increasing. In order to reduce the amount of volatile organic compounds and carbon dioxide generated, it has been studied to impart a design to an adherend such as the exterior of a moving body by attaching a decorative sheet.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When attaching a decorative sheet to an adherend having a desired shape, it is required to accurately align the design displayed on the decorative sheet with the shape of the adherend. The present disclosure aims to facilitate the alignment of the decorative sheet.

Means for Solving the Problems

[0006] The decorative sheet of the present disclosure is a decorative sheet used for the exterior of a moving body, a decorative layer, and an adhesive layer laminated on the decorative layer. After the bonding layer of the decorative sheet and the adherend are brought into contact with each other in an environment of 23°C, the adhesive force between the bonding layer and the adherend when the bonding layer is peeled off from the adherend in the 180° direction is 0.02 N / inch or less. After the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 2 kg roller while heating to 80°C, the adhesive force between the bonding layer and the adherend when the bonding layer is peeled off from the adherend in the 180° direction in an environment of 23°C is 7.0 N / inch or more.

Advantages of the Invention

[0007] According to the present disclosure, the alignment of the decorative sheet can be facilitated.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0009] In the drawings attached to this specification, for the convenience of illustration and easy understanding, the scale, the aspect ratio of the vertical and horizontal dimensions, etc. are appropriately changed and exaggerated from those of the actual object. In some of the drawings, the configurations shown may be omitted in other drawings.

[0010] In this specification, terms specifying shapes, geometric conditions, and their degrees, such as terms like "parallel", "orthogonal", "identical", etc., and values of lengths and angles are not limited to strict meanings, and are interpreted to include ranges to the extent that similar functions can be expected.

[0011] In this specification, when there are a plurality of candidate upper limit values and a plurality of candidate lower limit values for a parameter, the parameter may be a numerical range obtained by combining any one candidate upper limit value and any one candidate lower limit value.

[0012] One embodiment of the present disclosure relates to the following [1] to [7]. [1] A decorative sheet used for the exterior body of a moving body, a decorative layer, and a bonding layer laminated on the decorative layer, and after bringing the bonding layer of the decorative sheet into contact with an adherend in an environment of 23°C, when peeling the bonding layer from the adherend in a 180° direction, the adhesive force between the bonding layer and the adherend is 0.02 N / inch or less, while heating to 80°C, after crimping the bonding layer of the decorative sheet to the adherend with a 2 kg roller, when peeling the bonding layer from the adherend in a 180° direction in an environment of 23°C, the adhesive force between the bonding layer and the adherend is 7.0 N / inch or more, a decorative sheet. [2] A decorative sheet used for the exterior body of a moving body, a decorative layer, and a bonding layer laminated on the decorative layer, and after crimping the bonding layer of the decorative sheet to the adherend with a 2 kg roller in an environment of 23°C, when peeling the bonding layer from the adherend in a 180° direction, the adhesive force between the bonding layer and the adherend is 0.05 N / inch or more, after crimping the bonding layer of the decorative sheet to the adherend with a 5 kg roller in an environment of 40°C, when peeling the bonding layer from the adherend in a 180° direction, the adhesive force between the bonding layer and the adherend is 2.50 N / inch or less, While heating to 80°C, the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 2 kg roller, and then, when peeling the bonding layer from the adherend in the 180° direction in an environment of 23°C, the adhesive force between the bonding layer and the adherend is 7.0 N / inch or more. Decorative sheet. [3] After bringing the bonding layer of the decorative sheet into contact with the adherend in an environment of 23°C, when peeling the bonding layer from the adherend in the 180° direction, the adhesive force between the bonding layer and the adherend is 0.02 N / inch or less. The decorative sheet according to [2]. [4] While heating to 80°C, the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 2 kg roller, and then, when peeling the bonding layer from the adherend in the 180° direction in an environment of 75°C, the adhesive force between the bonding layer and the adherend is 5.0 N / inch or more. The decorative sheet according to any one of [1] to [3]. [5] After pressure-bonding the bonding layer of the decorative sheet to the adherend with a 2 kg roller in an environment of 23°C, when peeling the bonding layer from the adherend in the 0° direction, the adhesive force between the bonding layer and the adherend is 15.0 N / inch or more. The decorative sheet according to any one of [1] to [4]. [6] A plurality of grooves are provided in the bonding layer. The decorative sheet according to any one of [1] to [5]. [7] A moving body including the decorative sheet according to any one of [1] to [6].

[0013] An embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 shows a moving body 1 according to an embodiment of the present disclosure. The moving body 1 is a movable device or instrument. In the example shown in FIG. 1, the moving body 1 is an automobile. The moving body 1 may be a motorcycle, a bicycle, a tricycle, a train, an airplane, a ship, a snowmobile, an industrial robot, a drone, or the like. The automobile may be a truck, a bus, a taxi, an ambulance, a fire truck, a police vehicle, a work vehicle for construction, or the like.

[0014] The moving body 1 has a decorative member 10. In the example shown in FIG. 1, the automobile has the decorative member 10 as a part of the exterior body. A part of the exterior body of the automobile is, for example, at least one of a roof, a bonnet, a fender, a bumper, a mirror, a door, a pillar, a sill, and a trunk lid. In the illustrated example, the automobile has the decorative member 10 as a roof. The moving body 1 may have a plurality of decorative members 10.

[0015] The decorative member 10 may include a portion with a flat surface. The decorative member 10 may include a portion with a curved surface. FIG. 2 shows a cross-sectional view of the decorative member 10. In FIG. 2, the decorative member 10 is shown as flat as a whole for ease of understanding.

[0016] As shown in FIG. 2, the decorative member 10 includes an adherend 11 and a decorative sheet 20. The decorative sheet 20 includes a first surface 20A and a second surface 20B. The first surface 20A and the second surface 20B are a pair of main surfaces of the decorative sheet 20. The second surface 20B is the surface on the opposite side of the first surface 20A. The first surface 20A of the decorative sheet 20 forms the surface of the decorative member 10. The second surface 20B of the decorative sheet 20 is in contact with the adherend 11. The decorative sheet 20 is adhered to the adherend 11.

[0017] The adherend 11 is the main body part of the exterior body. The adherend 11 is a member to be decorated that is decorated by the decorative sheet 20. The adherend 11 has the shape of at least a part of the exterior body of the moving body 1. For example, the adherend 11 has the shape of the roof of an automobile. The adherend 11 may be produced, for example, by molding a thermoplastic material. By molding, the adherend 11 can be formed into a desired shape. The material of the adherend 11 may be, for example, metal, glass, or resin. The resin may be, for example, acrylic resin, polycarbonate resin, acrylonitrile-butadiene-styrene copolymer, polycarbonate resin, polypropylene resin, or fiber-reinforced plastic.

[0018] The adherend 11 may include a surface material. The surface material forms the surface of the adherend 11. The adherend 11 may be in contact with the second surface 20B of the decorative sheet 20 at the surface material. The surface material may be any one of, for example, an acrylic resin, a urethane resin, an acrylic urethane resin, an epoxy resin, a melamine resin, and a zinc plating.

[0019] The decorative sheet 20 displays a design. The decorative member 10 including the decorative sheet 20 can display an excellent design. By using the decorative member 10 including the decorative sheet 20 for the exterior body of the moving body 1, the moving body 1 exhibits an excellent appearance. The decorative sheet 20 may display designs such as colors and geometric patterns. The decorative sheet 20 may display designs with a metallic or leather-like texture. The decorative sheet 20 may display gloss or matte designs.

[0020] As shown in FIG. 2, the decorative sheet 20 includes a surface layer 27, a base material layer 21, a decorative layer 23, and a bonding layer 25 from the first surface 20A toward the second surface 20B. FIG. 3 shows a cross-sectional view of an example of the decorative sheet 20 before being adhered to the adherend 11. The bonding layer 25 is laminated on the decorative layer 23 via the base material layer 21. In the example shown in FIG. 3, the decorative sheet 20 further includes a separator 29 provided on the second surface 20B. Without being limited to the illustrated example, the surface layer 27 may be omitted.

[0021] The base material layer 21 supports other layers included in the decorative sheet 20, such as the surface layer 27, the decorative layer 23, and the bonding layer 25. The base material layer 21 is in the form of a film. The thickness of the base material layer 21 may be 20 μm or more, or may be 40 μm or more. The thickness of the base material layer 21 may be 200 μm or less, or may be 180 μm or less.

[0022] The base material layer 21 may contain vinyl resins such as polyvinyl chloride (PVC), polyvinylidene chloride (PVDF), polyvinyl alcohol (PVA), ethylene-vinyl acetate copolymer (EVA), ethylene-vinyl alcohol copolymer (EVOH), etc. The base material layer 21 may contain acrylic resins such as poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), etc. The base material layer 21 may contain ionomer resins such as Himilan (registered trademark), etc. The base material layer 21 may contain resins such as polypropylene (PP), polyethylene (PE), polyacetal (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polyamide (PA), polyether ether ketone (PEEK), polystyrene (PS), thermoplastic polyurethane (TPU), acrylonitrile-styrene copolymer (AS), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-ethylene-styrene copolymer (AES), polycarbonate (PC), etc. The above-mentioned acrylonitrile-butadiene-styrene copolymer (ABS) may be referred to as "ABS resin". The above-mentioned polyethylene (PE) may contain high-density polyethylene (HDPE). The above-mentioned polyamide (PA) may contain nylon 6 and nylon 6,6.

[0023] The base material layer 21 may have a two-layer structure including an acrylic resin layer located near the second surface 20B and a fluororesin-containing layer located near the first surface 20A. The fluororesin means a polymer containing a monomer containing a fluorine atom as a polymerization component. The fluororesin may be, for example, a resin composed of a polymerization component selected from ethylene tetrafluoride, vinylidene chloride fluoride, vinyl fluoride, and vinylidene fluoride. More specifically, the fluororesin is a homopolymer of a polymerization component containing a fluorine atom such as ethylene tetrafluoride resin, vinyl fluoride resin, vinylidene fluoride resin, etc., and a copolymer containing the above polymerization component, such as vinylidene chloride fluoride-vinylidene fluoride copolymer, vinylidene fluoride-hexafluoropropylene copolymer, vinylidene fluoride-hexafluoropropylene-ethylene tetrafluoride copolymer, etc. The thickness of the fluororesin-containing layer may be 3 μm or more, 5 μm or more, 20 μm or less, or 15 μm or less.

[0024] The material of the base material layer 21 may be one type of resin alone or two or more types of resins selected from the above-mentioned plurality of resins. When the material of the base material layer 21 is two or more types of resins selected from the above-mentioned plurality of resins, the base material layer 21 may be a single layer in which the two or more types of resins are mixed, or may include a plurality of layers. The base material layer 21 composed of a plurality of layers may be produced, for example, by coextrusion. For example, the base material layer 21 may be a commercially available laminate in which an acrylic resin layer and a fluororesin layer are laminated by coextrusion. The base material layer 21 may be, for example, Acryplen FBS007 manufactured by Mitsubishi Chemical Corporation, FT-50Y manufactured by Kureha Corporation, etc.

[0025] The base material layer 21 may contain a colorant. By containing the colorant, the base material layer 21 is colored in a desired color. The colored base material layer 21 can improve the design displayed by the decorative sheet 20. The colorant may include one or more of pigments and dyes.

[0026] The decorative layer 23 forms the design displayed by the decorative sheet 20. The design formed by the decorative layer 23 may be a single color. The decorative layer 23 may include, for example, at least one of a binder resin, a colorant, and a brightening material. The decorative layer 23 forms a design with a colorant and a brightening material. The thickness of the decorative layer 23 may be, for example, 1 μm or more and may be 50 μm or less.

[0027] The binder resin encapsulates the colorant and the brightening material. The binder resin may be, for example, a resin such as a urethane resin, an acrylic polyol resin, an acrylic resin, an ester resin, an amide resin, a butyral resin, a styrene resin, a urethane-acrylic copolymer, a vinyl chloride-vinyl acetate copolymer resin, a vinyl chloride-vinyl acetate-acrylic copolymer resin, a chlorinated propylene resin, a nitrocellulose resin, or a cellulose acetate resin.

[0028] The colorant may be a dye, a pigment, or a combination of a dye and a pigment. Considering weather resistance and the like, the colorant is preferably a pigment. The pigment may be a coloring pigment or a fluorescent pigment. The coloring pigment may be, for example, an organic pigment such as a quinacridone-based pigment like quinacridone red, an azo-based pigment like pigment red, a phthalocyanine-based pigment like phthalocyanine blue or phthalocyanine green, or a perylene-based pigment like perylene red, or an inorganic pigment such as titanium oxide or carbon black. The color of the colorant may be a chromatic color or an achromatic color. The brightening material reflects light. The brightening material may be, for example, an aluminum flake, mica, or a pearl pigment.

[0029] The surface layer 27 protects other layers of the decorative sheet 20. The surface layer 27 has various functions such as abrasion resistance, weather resistance, and chemical resistance, for example. The surface layer 27 has abrasion resistance, weather resistance, chemical resistance, and ductility required for molding, which are required for exterior bodies such as automobiles, for example. The surface layer 27 forms the first surface 20A of the decorative sheet 20. The surface layer 27 forms the surface of the decorative member 10. The surface layer 27 is in the form of a thin film. The surface layer 27 is transparent. The thickness of the surface layer 27 may be 1 μm or more, 2 μm or more, 40 μm or less, or 30 μm or less. The material of the surface layer 27 may be a cured product of a curable resin composition. More specifically, the material of the surface layer 27 may be a cured product of an ionizing radiation curable resin composition.

[0030] In this specification, "transparent" means that the visible light transmittance is 40% or more, 70% or more, or 80% or more. In this specification, the visible light transmittance is specified as the average value of the light transmittance at each wavelength when measured at every 1 nm within the range of the measurement wavelength of 380 nm or more and 780 nm or less using a spectrophotometer ("UV-3600i Plus" manufactured by Shimadzu Corporation, a product compliant with JIS K0115). When measuring the visible light transmittance, the incident angle is 0° unless the transmission direction is specifically defined. The incident angle is the angle formed by the traveling direction of the incident light with respect to the normal direction to the incident surface and has a value less than 90°.

[0031] The bonding layer 25 is adhered by bonding the decorative sheet 20 to the adherend 11. The bonding layer 25 forms the second surface 20B of the decorative sheet 20. The bonding layer 25 is in a thin film form. The bonding layer 25 exhibits almost no adhesiveness at a temperature of about 23°C or about 40°C, but exhibits adhesiveness when the temperature reaches about 80°C. 23°C is the general temperature of the environment where the operation of bonding the decorative sheet 20 to the adherend 11 is performed, and 40°C is the temperature assumed for the working environment during high-temperature periods such as summer. The thickness of the bonding layer 25 may be, for example, 10 μm or more, or may be 100 μm or less. The material of the bonding layer 25 may be, for example, polyester urethane resin, polyester, polyolefin, polyamide, poly(methyl)acrylate, ethylene-vinyl acetate copolymer.

[0032] A plurality of grooves 25A may be provided in the bonding layer 25. The grooves 25A are recesses in the bonding layer 25. The grooves 25A are provided on the surface of the bonding layer 25 that forms the second surface 20B of the decorative sheet 20. The plurality of grooves 25A are arranged in one direction and are arranged in another direction non-parallel to the one direction. The cross-sectional shape of the groove 25A may be a polygonal shape such as a triangular shape as shown in FIGS. 2 and 3, or may be a semi-circular shape or the like. The shapes of the respective grooves 25A may be different from each other or may be random. The depth of the groove 25A may be 3 μm or more, or may be 30 μm or less. The width of the groove 25A may be 20 μm or more, or may be 200 μm or less.

[0033] The separator 29 prevents the bonding layer 25 from unintentionally bonding to other members. The separator 29 is peeled off from the second surface 20B of the decorative sheet 20 when the decorative sheet 20 is bonded to the adherend 11.

[0034] The bonding layer 25 of the decorative sheet 20 and the adherend 11 hardly bond to each other without applying pressure or heat. Specifically, after bringing the bonding layer 25 of the decorative sheet 20 into contact with the adherend 11 in an environment of 23°C, the adhesive force between the bonding layer 25 and the adherend 11 when peeling the bonding layer 25 in the 180° direction with respect to the adherend 11 may be 0.02 N / inch or less, or may be 0.01 N / inch or less, or may be 0.00 N / inch or less, or may be greater than 0.000 N / inch. Even in an environment of 40°C, after bringing the bonding layer 25 of the decorative sheet 20 into contact with the adherend 11, the adhesive force between the bonding layer 25 and the adherend 11 when peeling the bonding layer 25 in the 180° direction with respect to the adherend 11 may be 0.02 N / inch or less, or may be 0.01 N / inch or less, or may be 0.00 N / inch or less, or may be greater than 0.000 N / inch.

[0035] The adhesive force between the bonding layer 25 and the adherend 11 is calculated from the load when bonding the bonding layer 25 and the adherend 11 with a width of 25.4 mm (1 inch) and peeling the decorative sheet 20 at a speed of 300 mm / min. However, the adhesive force between the bonding layer 25 and the adherend 11 when peeling the bonding layer 25 in the 0° direction with respect to the adherend 11, which will be described later, is calculated by peeling the decorative sheet 20 when the bonding layer 25 and the adherend 11 are bonded with a width of 5 mm. For the measurement of the peeling and load of the decorative sheet 20 in an environment of 23°C or 40°C, a force gauge (ZTA-50N manufactured by IMADA) is used. For the measurement of the peeling and load of the decorative sheet 20 in an environment of 75°C, which will be described later, a material testing machine (Instron 5565 manufactured by Instron) is used. The measurement of the adhesive force between the bonding layer 25 and the adherend 11 complies with Method 1 of JIS Z0237:2022, and the description of the same measurement conditions as Method 1 of JIS Z0237:2022 is omitted.

[0036] The bonding layer 25 of the decorative sheet 20 and the adherend 11 are slightly bonded when pressure is applied without applying heat. The decorative sheet 20 can be peeled off from the adherend 11, and the decorative sheet 20 is not easily displaced with respect to the adherend 11. It is easy to peel the decorative sheet 20 from the adherend 11 in the 180° direction, and it is difficult to peel in the 0° direction. Specifically, after the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller in an environment of 23°C, the adhesive force between the bonding layer 25 and the adherend 11 when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction may be 0.05 N / inch or more, may be 0.10 N / inch or more, may be 2.50 N / inch or less, or may be 1.0 N / inch or less. After the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 5 kg roller in an environment of 23°C, the adhesive force between the bonding layer 25 and the adherend 11 when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction may be 0.05 N / inch or more, may be 0.10 N / inch or more, may be 2.50 N / inch or less, or may be 1.0 N / inch or less. After the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller in an environment of 23°C, the adhesive force between the bonding layer 25 and the adherend 11 when the bonding layer 25 is peeled off from the adherend 11 in the 0° direction may be 15.0 N / inch or more, may be 20.0 N / inch or more, may be 30.0 N / inch or more, or may be 50.0 N / inch or less. After the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 5 kg roller in an environment of 23°C, the adhesive force between the bonding layer 25 and the adherend 11 when the bonding layer 25 is peeled off from the adherend 11 in the 0° direction may be 15.0 N / inch or more, may be 20.0 N / inch or more, may be 30.0 N / inch or more, or may be 50.0 N / inch or less.After the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller in an environment of 40°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 0.05 N / inch or more, or may be 0.10 N / inch or more, or may be 2.50 N / inch or less, or may be 1.0 N / inch or less. After the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 5 kg roller in an environment of 40°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 0.05 N / inch or more, or may be 0.10 N / inch or more, or may be 2.50 N / inch or less, or may be 1.0 N / inch or less. After the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller in an environment of 40°C, when the bonding layer 25 is peeled off from the adherend 11 in the 0° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 15.0 N / inch or more, or may be 20.0 N / inch or more, or may be 30.0 N / inch or more, or may be 50.0 N / inch or less. After the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 5 kg roller in an environment of 40°C, when the bonding layer 25 is peeled off from the adherend 11 in the 0° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 15.0 N / inch or more, or may be 20.0 N / inch or more, or may be 30.0 N / inch or more, or may be 50.0 N / inch or less.

[0037] Pressing the bonding layer 25 of the decorative sheet 20 against the adherend 11 with a roller means applying pressure to the decorative sheet 20 and the adherend 11 with the roller so that only the weight of the roller acts on the decorative sheet 20 and the adherend 11. The width of the roller is 25.4 mm (1 inch). The speed at which the roller is rolled against the decorative sheet 20 and the adherend 11 is 350 mm / min. The roller reciprocates once with respect to the decorative sheet 20 and the adherend 11. Pressing the bonding layer 25 against the adherend 11 with a roller complies with JIS Z0237:2022, and descriptions of the same measurement conditions as those described in JIS Z0237:2022 are omitted.

[0038] The bonding layer 25 of the decorative sheet 20 and the adherend 11 are properly bonded under the application of pressure and heat. Specifically, while heating to 80°C, the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller, and then, in an environment of 23°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 7.0 N / inch or more, or 10.0 N / inch or more, or 20.0 N / inch or more, or 80.0 N / inch or less. While heating to 80°C, the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 5 kg roller, and then, in an environment of 23°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 7.0 N / inch or more, or 10.0 N / inch or more, or 20.0 N / inch or more, or 80.0 N / inch or less. While heating to 100°C, the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller, and then, in an environment of 23°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 7.0 N / inch or more, or 10.0 N / inch or more, or 20.0 N / inch or more, or 80.0 N / inch or less. While heating to 100°C, the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 5 kg roller, and then, in an environment of 23°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 7.0 N / inch or more, or 10.0 N / inch or more, or 20.0 N / inch or more, or 80.0 N / inch or less.

[0039] Pressing while heating means that after confirming that the portion to be pressure-bonded maintains a predetermined temperature for 5 seconds or more, while confirming that the portion to be pressure-bonded maintains a predetermined temperature during the pressure-bonding, perform the desired pressure-bonding.

[0040] The bonding layer 25 of the decorative sheet 20 and the adherend 11 will remain bonded even if heat is applied again after bonding. After pressing the bonding layer 25 of the decorative sheet 20 against the adherend 11 with a 2 kg roller while heating to 80°C, when peeling the bonding layer 25 from the adherend 11 in the 180° direction in an environment of 75°C, the adhesive force between the bonding layer 25 and the adherend 11 may be 5.0 N / inch or more, or 8.0 N / inch or more, or 10.0 N / inch or more, or 40.0 N / inch or less. After pressing the bonding layer 25 of the decorative sheet 20 against the adherend 11 with a 5 kg roller while heating to 80°C, when peeling the bonding layer 25 from the adherend 11 in the 180° direction in an environment of 75°C, the adhesive force between the bonding layer 25 and the adherend 11 may be 5.0 N / inch or more, or 8.0 N / inch or more, or 10.0 N / inch or more, or 40.0 N / inch or less. After pressing the bonding layer 25 of the decorative sheet 20 against the adherend 11 with a 2 kg roller while heating to 100°C, when peeling the bonding layer 25 from the adherend 11 in the 180° direction in an environment of 75°C, the adhesive force between the bonding layer 25 and the adherend 11 may be 5.0 N / inch or more, or 8.0 N / inch or more, or 10.0 N / inch or more, or 40.0 N / inch or less. After pressing the bonding layer 25 of the decorative sheet 20 against the adherend 11 with a 5 kg roller while heating to 100°C, when peeling the bonding layer 25 from the adherend 11 in the 180° direction in an environment of 75°C, the adhesive force between the bonding layer 25 and the adherend 11 may be 5.0 N / inch or more, or 8.0 N / inch or more, or 10.0 N / inch or more, or 40.0 N / inch or less.

[0041] The adhesive force between the bonding layer 25 of the decorative sheet 20 and the adherend 11 can be adjusted, for example, by changing the material, thickness of the bonding layer 25, the pressure and temperature when pressing the bonding layer 25 of the decorative sheet 20 against the adherend 11, etc.

[0042] A method for manufacturing the decorative member 10 by attaching the decorative sheet 20 to the adherend 11 will be described.

[0043] Separate the separator 29 from the decorative sheet 20 shown in Fig. 3. The second surface 20B of the decorative sheet 20 is exposed.

[0044] At the position on the adherend 11 where the decorative sheet 20 is to be attached, bring the bonding layer 25 forming the second surface 20B of the decorative sheet 20 into contact with the adherend 11. The position on the adherend 11 where the decorative sheet 20 is to be attached may be determined in advance according to the shape of the adherend 11 and the design displayed by the decorative sheet 20. At the position on the adherend 11 where the decorative sheet 20 is to be attached, press the bonding layer 25 of the decorative sheet 20 against the adherend 11 with a roller, squeegee, or the like. By applying pressure, the bonding layer 25 of the decorative sheet 20 and the adherend 11 are slightly joined. If air or the like has entered between the bonding layer 25 and the adherend 11, squeeze it with a finger or the like to expel the air from the groove 25A of the bonding layer 25 to the outside of the bonding layer 25.

[0045] If the decorative sheet 20 has shifted from the position on the adherend 11 where the decorative sheet 20 is to be attached in a state where the bonding layer 25 of the decorative sheet 20 and the adherend 11 are slightly joined, peel the decorative sheet 20 from the adherend 11. At the position on the adherend 11 where the decorative sheet 20 is to be attached, perform again the step of bringing the bonding layer 25 forming the second surface 20B of the decorative sheet 20 into contact with the adherend 11.

[0046] If the decorative sheet 20 is positioned at the position on the adherend 11 where the decorative sheet 20 is to be attached in a state where the bonding layer 25 of the decorative sheet 20 and the adherend 11 are slightly joined, press the bonding layer 25 of the decorative sheet 20 against the adherend 11 with a roller, squeegee, or the like while heating to a high temperature. The bonding layer 25 of the decorative sheet 20 and the adherend 11 are properly joined so as not to peel off. Thereby, the decorative sheet 20 is attached to the adherend 11. As shown in Fig. 2, the decorative member 10 with the decorative sheet 20 attached to the adherend 11 is manufactured.

[0047] When attaching a decorative sheet to an adherend, it is required to accurately align the design displayed on the decorative sheet with the shape of the adherend. The bonding layer of a conventional decorative sheet has such a high adhesive force when pressure is applied that it is difficult to adjust the position of the decorative sheet relative to the adherend even if the decorative sheet is displaced from the position where it should be attached to the adherend. Alternatively, the bonding layer of a conventional decorative sheet has a low adhesive force only by applying pressure, and the decorative sheet is likely to be displaced from the position where it should be attached to the adherend.

[0048] In the decorative sheet 20 of the present embodiment, after bringing the bonding layer 25 of the decorative sheet 20 into contact with the adherend 11 in an environment of 23°C, the adhesive force between the bonding layer 25 and the adherend 11 when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction is 0.02 N / inch or less. In a state where no pressure is applied to the decorative sheet 20 with respect to the adherend 11, the bonding layer 25 of the decorative sheet 20 and the adherend 11 hardly bond to each other. Before attaching the decorative sheet 20 to the adherend 11, the decorative sheet 20 can be freely aligned with the adherend 11. The alignment of the decorative sheet 20 can be facilitated.

[0049] In the decorative sheet 20 of the present embodiment, after the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller in an environment of 23°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 is 0.05 N / inch or more. When pressure is applied to the decorative sheet 20 against the adherend 11 without applying heat, the bonding layer 25 of the decorative sheet 20 and the adherend 11 are slightly bonded. If the decorative sheet 20 is displaced from the position where the decorative sheet 20 of the adherend 11 should be attached, the decorative sheet 20 can be peeled off from the adherend 11 and re-aligned with the adherend 11. The alignment of the decorative sheet 20 can be facilitated. When the decorative sheet 20 is peeled off from the adherend 11 and re-aligned with the adherend 11, since the bonding layer 25 of the decorative sheet 20 and the adherend 11 are only slightly bonded, when the decorative sheet 20 is peeled off from the adherend 11, deterioration of the design such as the occurrence of a so-called shock line is suppressed.

[0050] In the decorative sheet 20 of the present embodiment, after the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 5 kg roller in an environment of 40°C, when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction, the adhesive force between the bonding layer 25 and the adherend 11 is 2.50 N / inch or less. In a high-temperature period such as summer, even if the pressure for pressure-bonding the bonding layer 25 to the adherend 11 is high, the bonding layer 25 of the decorative sheet 20 and the adherend 11 are slightly bonded. The decorative sheet 20 is difficult to move relative to the adherend 11. Even if it comes into contact with the decorative sheet 20 unintentionally, the decorative sheet 20 is unlikely to be displaced from the position where the decorative sheet 20 of the adherend 11 should be attached. The alignment of the decorative sheet 20 can be facilitated.

[0051] In the decorative sheet 20 of the present embodiment, after the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller while heating to 80°C, the adhesive force between the bonding layer 25 and the adherend 11 when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction in an environment of 23°C is 7.0 N / inch or more. When pressure is applied to the decorative sheet 20 with respect to the adherend 11 in a heated state, the bonding layer 25 of the decorative sheet 20 and the adherend 11 are properly bonded. The decorative sheet 20 is fixed at the position on the adherend 11 where the decorative sheet 20 is to be adhered. The decorative sheet 20 is properly aligned.

[0052] In the decorative sheet 20 of the present embodiment, after the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller while heating to 80°C, the adhesive force between the bonding layer 25 and the adherend 11 when the bonding layer 25 is peeled off from the adherend 11 in the 180° direction in an environment of 75°C may be 5.0 N / inch or more. When the decorative sheet 20 is used as the exterior body of the moving body 1, etc., the decorative sheet 20 of the moving body 1 can be heated to a high temperature by sunlight or the like. For example, the exterior body of the moving body 1 can reach 70°C. Even in a high-temperature environment, the state where the bonding layer 25 of the decorative sheet 20 and the adherend 11 are properly bonded is maintained. Even when exposed to high temperatures, the decorative sheet 20 is difficult to shift at the position on the adherend 11 where the decorative sheet 20 is to be adhered, and the decorative sheet 20 is difficult to peel off from the adherend 11. The decorative sheet 20 is fixed at the position on the adherend 11 where the decorative sheet 20 is to be adhered. The state where the decorative sheet 20 is properly aligned can be maintained.

[0053] In the decorative sheet 20 of the present embodiment, after the bonding layer 25 of the decorative sheet 20 is pressure-bonded to the adherend 11 with a 2 kg roller in an environment of 23°C, when the bonding layer 25 is peeled off from the adherend 11 in the 0° direction, the adhesive force between the bonding layer 25 and the adherend 11 may be 15.0 N / inch or more. When pressure is applied to the decorative sheet 20 against the adherend 11 without applying heat, the bonding layer 25 of the decorative sheet 20 and the adherend 11 are slightly bonded. The decorative sheet 20 is difficult to move with respect to the adherend 11. Even if it comes into contact with the decorative sheet 20 unintentionally, the decorative sheet 20 is unlikely to deviate from the position where the decorative sheet 20 of the adherend 11 should be adhered. The alignment of the decorative sheet 20 can be facilitated.

[0054] In the decorative sheet 20 of the present embodiment, a plurality of grooves 25A may be provided in the bonding layer 25. Even if air or the like enters between the bonding layer 25 and the adherend 11 when the decorative sheet 20 is pressure-bonded to the adherend 11, the air can be expelled from the grooves 25A to the outside of the bonding layer 25. It is possible to suppress the remaining of air bubbles in the bonding layer 25 from deteriorating the design displayed by the decorative sheet 20. It is possible to suppress the bonding layer 25 from being easily peeled off from the adherend 11 due to air bubbles.

[0055] Various modifications can be made to the above-described embodiment. For example, FIG. 4 shows a modified example of the decorative sheet 20. In the example shown in FIG. 4, the decorative sheet 20 includes a surface layer 27, a base material layer 21, a decorative layer 23, a backing layer 22, and a bonding layer 25 from the first surface 20A toward the second surface 20B.

[0056] The backing layer 22 maintains the shape of the decorative sheet 20 when the decorative sheet 20 is adhered to the adherend 11. The backing layer 22 is in a sheet shape. The backing layer 22 may contain a coloring agent. The backing layer 22 may be opaque. The thickness of the backing layer 22 may be 50 μm or more, 75 μm or more, or 250 μm or less. The material of the backing layer 22 may be the same as the example of the material of the base material layer 21 described above.

[0057] By including the backing layer 22 in the decorative sheet 20, deformation of the decorative sheet 20 is suppressed when the decorative sheet 20 is adhered to the adherend 11. Deterioration of the design displayed by the decorative sheet 20 can be suppressed.

[0058] Not limited to the above-described embodiments, the decorative sheet 20 may include a surface layer 27, a decorative layer 23, a base material layer 21, and a bonding layer 25 from the first surface 20A toward the second surface 20B. That is, the decorative layer 23 may be disposed closer to the surface layer 27 than the base material layer 21.

[0059] Not limited to the above-described embodiments, by including a colorant in the base material layer 21, the design displayed by the decorative sheet 20 may be formed by the base material layer 21. In this case, the decorative layer 23 may be omitted. In other words, the base material layer 21 may also serve as the decorative layer 23.

[0060] Aspects of the present disclosure are not limited to the above-described embodiments and their modifications, but also include various modifications that can be conceived by those skilled in the art, and the effects of the present disclosure are not limited to the contents related to the above-described embodiments and their modifications. Various additions, changes, and partial deletions are possible without departing from the conceptual ideas and spirit of each disclosure derived from the content defined in the claims and their equivalents.

Example

[0061] The present disclosure will be described in more detail with reference to examples. The present disclosure is not limited to the following examples.

[0062] As examples and comparative examples, decorative sheets were prepared. The decorative sheet had a surface layer, a base material layer, a decorative layer, a backing layer, and an adhesive layer in this order. For the surface layer, a UV-curable hard coat with a thickness of 5 μm (UV-1700B manufactured by Mitsubishi Chemical Corporation) was used. For the base material layer, an acrylic resin with a thickness of 53 μm (HBS006H manufactured by Mitsubishi Chemical Corporation) was used. For the decorative layer, an ink composed of an acrylic resin with a thickness of 7 μm and a pigment (XFM ink series manufactured by Teikoku Ink Co., Ltd.) was used. For the backing layer, a mixed resin with a thickness of 150 μm (a resin obtained by adding 35 parts by mass of a polyester-based plasticizer to 100 parts by mass of a vinyl chloride-based resin) was used. The decorative sheets of each example and comparative example were adhered to the adherend by bonding with the adhesive layer. As the adherend, the one produced as follows was used. On an acrylic film with a thickness of 250 μm (Technoloy S001G manufactured by Sumika Acrylic Sales Co., Ltd.), a two-component curable urethane-based primer layer with a dry film thickness of 50 μm (a mixture of 100 parts by mass of Rock Paint's Rockplasa Fクライマックス and 25 parts by mass of Eco Multi Hardener Flex) was formed. Next, a two-component curable acrylic urethane clear layer with a dry film thickness of 50 μm (a mixture of 100 parts by mass of Rock Paint's Eco Rock Hyper Clear H and 50 parts by mass of Eco Rock Hardener Flex) was formed. The one dried in an environment at 60 °C for 1 hour was used as the adherend.

[0063] In each of the examples and comparative examples, the composition of the adhesive layer, the temperature of the environment, the weight of the roller for pressing the decorative sheet onto the adherend, and the temperature when pressing the decorative sheet onto the adherend while heating were different from each other.

[0064] The adhesive layers of Examples 1 to 8 were polyester urethane resins (Vylon UR-3210 manufactured by Toyobo Co., Ltd.). Methyl ethyl ketone was used as the solvent for the adhesive layer. The solid content ratio contained in the adhesive layer was 30% by mass. The thickness of the adhesive layer was 30 μm.

[0065] The bonding layers of Comparative Examples 1 to 8 were pressure-sensitive adhesives obtained by mixing 0.04% by mass of an isocyanate-based curing agent (Coronate HX manufactured by Tosoh Corporation) with 100% by mass of an acrylic resin (Daiaclac 5018 manufactured by Daido Kasei Kogyo Co., Ltd.). The thickness of the bonding layer was 50 μm.

[0066] The bonding layers of Comparative Examples 9 to 16 were heat seals obtained by mixing 10% by mass of an isocyanate-based compound with 100% by mass of a polyester resin. A mixture of 50% by mass of methyl ethyl ketone and 50% by mass of ethyl acetate was used as the solvent for the bonding layer. The thickness of the bonding layer was 2.0 μm.

[0067] After bringing the bonding layer of the decorative sheet of each Example and Comparative Example into contact with the adherend, the adhesive force between the bonding layer and the adherend when the bonding layer was peeled off from the adherend in the 180° direction was measured. The ease of peeling of the bonding layer from the adherend by hand in the 180° direction was evaluated by sensory evaluation. Those that could be peeled off with almost no force were evaluated as A, those that were difficult to peel off without applying force were evaluated as B, and those that could not be peeled off even when force was applied were evaluated as C.

[0068] After the bonding layer of the decorative sheet of each Example and Comparative Example was pressure-bonded to the adherend with a roller, the adhesive force between the bonding layer and the adherend when the bonding layer was peeled off from the adherend in the 0° direction and the 180° direction was measured. The ease of peeling of the bonding layer from the adherend by hand in the 0° direction and the 180° direction was evaluated by sensory evaluation. For peeling in the 180° direction, those that could be peeled off when force was applied were evaluated as A, those that could be peeled off when a little force was applied were evaluated as B, and those that could be peeled off with almost no force and those that could not be peeled off even when force was applied were evaluated as C. For peeling in the 0° direction, those that could not be peeled off even when force was applied were evaluated as A, those that could not be peeled off without applying a considerable amount of force were evaluated as B, and those that could be peeled off when force was applied were evaluated as C.

[0069] While heating, the bonding layer of the decorative sheet of each example and comparative example was pressure-bonded to the adherend with a roller, and then the adhesive force between the bonding layer and the adherend when the bonding layer was peeled off from the adherend in the 180° direction was measured. The ease of peeling of the bonding layer from the adherend in the 180° direction was evaluated by sensory evaluation. Those that could not be peeled off even when force was applied were evaluated as A, those that could not be peeled off unless a considerable amount of force was applied were evaluated as B, and those that could be peeled off with almost no force applied were evaluated as C.

[0070] While heating, the bonding layer of the decorative sheet of each example and comparative example was pressure-bonded to the adherend with a roller, and then in an environment of 75°C, the adhesive force between the bonding layer and the adherend when the bonding layer was peeled off from the adherend in the 180° direction was measured. The ease of peeling of the bonding layer from the adherend in the 180° direction was evaluated by sensory evaluation. Those that could not be peeled off even when force was applied were evaluated as A, those that could not be peeled off unless a considerable amount of force was applied were evaluated as B, and those that could be peeled off with almost no force applied were evaluated as C.

[0071] When the bonding layer of the decorative sheet was pressure-bonded to the adherend with a roller, pressure was applied to the decorative sheet and the adherend with the roller so that only the weight of the roller was applied to the decorative sheet and the adherend. The width of the roller was 25 mm. The speed at which the roller was rolled over the decorative sheet and the adherend was 350 mm / min. The roller made one round trip over the decorative sheet and the adherend. Other conditions for pressure-bonding the bonding layer to the adherend with a roller conformed to JIS Z0237:2022.

[0072] The adhesive force between the bonding layer and the adherend was calculated from the load when the bonding layer and the adherend were bonded with a width of 25.4 mm (1 inch) and the decorative sheet was peeled off at a speed of 300 mm / min. A force gauge (ZTA-50N manufactured by IMADA) was used to measure the peeling and load of the decorative sheet in an environment of 23°C or 40°C. A material testing machine (Instron 5565 manufactured by Instron Corporation) was used to measure the peeling and load of the decorative sheet in an environment of 75°C. Other conditions for measuring the adhesive force between the bonding layer and the adherend conformed to Method 1 of JIS Z0237:2022.

[0073] The composition of the bonding layer of the decorative sheet, the temperature of the environment, the weight of the roller for pressing the decorative sheet onto the adherend, the temperature when pressing the decorative sheet onto the adherend while heating, the measurement results of each adhesive force, and the results of each sensory evaluation for each example and comparative example are shown in Table 1 below.

[0074]

Table 1

[0075] From the results in Table 1, the following can be understood. When the adhesive force between the bonding layer of the decorative sheet and the adherend is 0.02 N / inch or less when the bonding layer is peeled off from the adherend in the 180° direction after bringing the bonding layer of the decorative sheet into contact with the adherend in an environment of 23°C, the bonding layer of the decorative sheet and the adherend are hardly bonded. Before sticking the decorative sheet to the adherend, the decorative sheet can be freely aligned with the adherend.

[0076] When the adhesive force between the bonding layer and the adherend is 0.05 N / inch or more when the bonding layer is peeled off from the adherend in the 180° direction after pressing the bonding layer of the decorative sheet onto the adherend with a 2 kg roller in an environment of 23°C, the bonding layer of the decorative sheet and the adherend are slightly bonded. If the decorative sheet is displaced from the position where the decorative sheet of the adherend should be stuck, the decorative sheet can be peeled off from the adherend and realigned with the adherend again.

[0077] After the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 5 kg roller in an environment of 40°C, when the adhesive force between the bonding layer and the adherend when the bonding layer is peeled off from the adherend in the 180° direction is 2.50 N / inch or less, or when the decorative sheet is displaced from the position where the decorative sheet of the adherend should be adhered, the decorative sheet can be peeled off from the adherend, and then the decorative sheet can be re-aligned with the adherend.

[0078] After the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 2 kg roller in an environment of 23°C, when the adhesive force between the bonding layer and the adherend when the bonding layer is peeled off from the adherend in the 0° direction is 15.0 N / inch or more, the bonding layer of the decorative sheet and the adherend are slightly bonded. The decorative sheet is difficult to move relative to the adherend. Even if it comes into unintended contact with the decorative sheet, the decorative sheet is unlikely to be displaced from the position where the decorative sheet of the adherend should be adhered.

[0079] After the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 2 kg roller while heating to 80°C, when the adhesive force between the bonding layer and the adherend when the bonding layer is peeled off from the adherend in the 180° direction in an environment of 23°C is 7.0 N / inch or more, the bonding layer of the decorative sheet and the adherend are properly bonded.

[0080] After the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 2 kg roller while heating to 80°C, when the adhesive force between the bonding layer and the adherend when the bonding layer is peeled off from the adherend in the 180° direction in an environment of 75°C is 5.0 N / inch or more, the bonding layer of the decorative sheet and the adherend 11 are properly bonded and maintained even in a high-temperature environment. Even when exposed to high temperatures, the decorative sheet is unlikely to be displaced at the position where the decorative sheet of the adherend should be adhered, and the decorative sheet is unlikely to be peeled off from the adherend.

Explanation of Signs

[0081] 1 Moving body 10 Decorative member 11 Adherend 20 Decorative sheet 21 Base material layer 22 Backer layer 23 Decorative layer 25 Bonding layer 25A Groove 27 Surface layer 29 Separator

Claims

1. A decorative sheet used for the exterior body of a moving object, comprising: a decorative layer; a bonding layer laminated on the decorative layer, after contacting the bonding layer of the decorative sheet with an adherend in an environment of 23°C, when peeling the bonding layer from the adherend in a 180° direction, the adhesive force between the bonding layer and the adherend is 0.02 N / inch or less; a decorative sheet, wherein after pressing the bonding layer of the decorative sheet against the adherend with a 2 kg roller while heating to 80°C, when peeling the bonding layer from the adherend in a 180° direction in an environment of 23°C, the adhesive force between the bonding layer and the adherend is 7.0 N / inch or more.

2. A decorative sheet used for the exterior body of a moving object, comprising: a decorative layer; a bonding layer laminated on the decorative layer, after pressing the bonding layer of the decorative sheet against the adherend with a 2 kg roller in an environment of 23°C, when peeling the bonding layer from the adherend in a 180° direction, the adhesive force between the bonding layer and the adherend is 0.05 N / inch or more; after pressing the bonding layer of the decorative sheet against the adherend with a 5 kg roller in an environment of 40°C, when peeling the bonding layer from the adherend in a 180° direction, the adhesive force between the bonding layer and the adherend is 2.50 N / inch or less; a decorative sheet, wherein after pressing the bonding layer of the decorative sheet against the adherend with a 2 kg roller while heating to 80°C, when peeling the bonding layer from the adherend in a 180° direction in an environment of 23°C, the adhesive force between the bonding layer and the adherend is 7.0 N / inch or more.

3. The decorative sheet according to claim 2, wherein after contacting the bonding layer of the decorative sheet with the adherend in an environment of 23°C, when peeling the bonding layer from the adherend in a 180° direction, the adhesive force between the bonding layer and the adherend is 0.02 N / inch or less.

4. The decorative sheet according to claim 1 or 2, wherein after pressing the bonding layer of the decorative sheet against the adherend with a 2 kg roller while heating to 80°C, when peeling the bonding layer from the adherend in a 180° direction in an environment of 75°C, the adhesive force between the bonding layer and the adherend is 5.0 N / inch or more.

5. In an environment of 23°C, after the bonding layer of the decorative sheet is pressure-bonded to the adherend with a 2 kg roller, when the bonding layer is peeled off from the adherend in the 0° direction, the adhesive force between the bonding layer and the adherend is 15.0 N / inch or more. The decorative sheet according to claim 1 or 2.

6. In the bonding layer of the decorative sheet according to claim 1 or 2, a plurality of grooves are provided.

7. A moving body including the decorative sheet according to claim 1 or 2.

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