Decorative sheet and decorative member

Abstract

To provide a decorative sheet and a decorative member that are resistant to slipping by human fingers.SOLUTION: A decorative sheet 10 comprises a base layer 1 and a thermoplastic resin layer 4 provided on the upper side UP of the base layer 1. The surface 4s on the upper side UP of the thermoplastic resin layer 4 has a static friction coefficient and a dynamic friction coefficient of 1 or more, a maximum height Rz of 3 μm or less, and an arithmetic average roughness Ra of 0.3 μm or less. A decorative member 100 comprises the decorative sheet 10 and a base material 20 provided on the lower side LO of the decorative sheet 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a decorative sheet and a decorative member. [Background technology]

[0002] Conventionally, there are decorative sheets used for the surface decoration of interior materials and fittings for buildings such as houses, building materials such as fittings, furniture and fixtures, residential equipment, home appliances, etc. In particular, there are decorative sheets that have a resin layer such as polyethylene terephthalate (PET) on the surface and have excellent heat resistance, chemical resistance, light resistance, etc. In addition, the surface material of a kitchen door, which is opened and closed by hand, is required to be non-slip for human fingers.

[0003] A decorative sheet having a resin layer on its surface is described in Patent Document 1. The decorative sheet described in Patent Document 1 comprises a transparent substrate made of polyethylene terephthalate (PET) and a hard coat film as a surface protective material, the hard coat film comprising an easy-adhesion layer and a hard coat layer laminated on one side of the transparent substrate. The hard coat layer contains an ultraviolet absorber and is resistant to yellowing before and after a light resistance test. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-120511 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the decorative sheet described in Patent Document 1 has a surface that may be slippery against a person's fingers.

[0006] In view of the above circumstances, an object of the present invention is to provide a decorative sheet and decorative member that are less likely to cause slippage of a person's fingers. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following means. The decorative sheet of the present invention comprises an original fabric layer and a thermoplastic resin layer provided on the upper side of the original fabric layer, and the upper surface of the thermoplastic resin layer has a static friction coefficient and a dynamic friction coefficient of 1 or more, a maximum height Rz of 3 μm or less, and an arithmetic mean roughness Ra of 0.3 μm or less.

[0008] In the decorative sheet, the thermoplastic resin layer may contain polyethylene terephthalate.

[0009] In the decorative sheet, the base layer may contain a polyolefin resin.

[0010] The decorative sheet may further include a picture pattern layer formed by printing a picture on the upper side of the base fabric layer.

[0011] The decorative member of the present invention comprises any one of the decorative sheets described above and a substrate provided below the decorative sheet. Effect of the Invention

[0012] According to the decorative sheet and decorative member of the present invention, it is possible to provide a decorative sheet and decorative member that are less likely to cause slippage of a person's fingers. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a cross-sectional view illustrating a decorative member according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] An embodiment of the present invention will be described with reference to the drawings.

[0015] FIG. 1 is a cross-sectional view that illustrates a decorative member 100 according to this embodiment. In this embodiment, as shown in FIG. 1, the thickness direction of the decorative member 100 is defined as the "vertical direction V", the side of the decorative member 100 on which the base material 20 is provided is defined as the "lower side LO" in the vertical direction V, and the side opposite the lower side LO is defined as the "upper side UP" in the vertical direction V.

[0016] The decorative member 100 comprises a decorative sheet 10 and a substrate 20 . The substrate 20 is provided on the lower side LO of the decorative sheet 10. Particle board, medium density fiberboard (MDF), or the like can be used as the substrate 20. Alternatively, the substrate 20 may be a metal plate-like member such as aluminum or stainless steel, or a composite plate in which a metal such as aluminum is attached to both sides of a core material made of resin such as polyethylene.

[0017] The decorative sheet 10 comprises an original fabric layer 1, a picture pattern layer 2, an adhesive layer 3, a thermoplastic resin layer 4, and a primer layer 5. The original fabric layer 1 is a layer provided on the upper side UP of a primer layer 5 described later. The original fabric layer 1 is a sheet-like layer made of a known material on which printing can be performed.

[0018] Polyolefin resins such as polyethylene and polypropylene can be used as the raw fabric layer 1. Also, fibrous sheets such as tissue paper or titanium paper may be used as the raw fabric layer 1. It is preferable to use polyolefin resins as the raw fabric layer 1. By using polyolefin resins as the raw fabric layer 1, it is easier to set the surface property parameters such as the surface roughness of the upper UP surface 4s of the thermoplastic resin layer 4 described later to any desired roughness compared to fibrous sheets such as titanium paper. Also, the decorative sheet 10 can be given sufficient rigidity.

[0019] The picture pattern layer 2 is a layer provided on the upper side UP of the raw fabric layer 1. The picture pattern layer 2 is formed by printing a picture pattern such as wood grain, stone grain, or sand grain on the upper side UP of the raw fabric layer 1. The printing method for the picture pattern layer 2 can be a known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing. A known printing ink (e.g., urethane ink) suitable for the printing method to be adopted can be used for the picture pattern layer 2. Furthermore, if the decorative sheet 10 does not need to have a pattern, the decorative sheet 10 does not need to have the picture pattern layer 2.

[0020] The adhesive layer 3 is a layer provided on the upper side UP of the picture pattern layer 2. The adhesive layer 3 is a layer provided for the purpose of improving the adhesion between the picture pattern layer 2 and the thermoplastic resin layer 4 described below. For the adhesive layer 3, known adhesive resins such as polyethylene, acrylic, polyester, and epoxy resins can be used. For the adhesive layer 3, it is preferable to use a transparent or semi-transparent material that allows the picture of the picture pattern layer 2 to be seen through. The adhesive that forms the adhesive layer 3 can be in the form of a solid such as a film, a liquid, or a powder, as appropriate.

[0021] The adhesive layer 3 can be formed by a known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing, or a formation method using a known coating device. The adhesive layer 3 may also be formed by a melt extrusion molding method. If the picture pattern layer 2 and the thermoplastic resin layer 4 have sufficient adhesion without the adhesive layer 3, the decorative sheet 10 does not need to have the adhesive layer 3.

[0022] The thermoplastic resin layer 4 is a layer provided on the upper side UP of the adhesive layer 3. The thermoplastic resin layer 4 may be provided on the surface of the upper side UP of the decorative sheet 10. For example, when the decorative sheet 10 does not include the picture pattern layer 2 and the adhesive layer 3, the thermoplastic resin layer 4 is provided on the upper side UP of the base fabric layer 1.

[0023] Examples of the thermoplastic resin layer 4 that can be used include cellulose derivatives such as ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxycellulose, and cellulose acetate propionate; polyethylene-based resins such as polyethylene, ethylene-vinyl acetate copolymer, and ethylene-vinyl alcohol copolymer; polypropylene resin, styrene-based resins such as polymethyl methacrylate, polyethyl acrylate, and polybutyl acrylate; vinyl-based resins such as polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl alcohol, polyvinyl butyral, and polyvinyl acetal; polyethylene terephthalate resin, polycarbonate resin, linear polyurethane resin, polyamide resin, fluororesins such as nylon 6, nylon 66, vinylidene fluoride, 4-fluoroethylene, and 3-fluorochloroethylene; 4-methylpentene-1 resin, polysulfone resin, polyphenyl oxide resin, rosin, rosin-modified maleic acid resin, rosin-modified phenolic resin, and rosin ester resins such as polymerized rosin; coumarone resin; and vinyl toluene resin.

[0024] It is desirable to use a material having high dimensional stability against temperature and humidity for the thermoplastic resin layer 4. For example, as thermoplastic resins having a heat distortion temperature of 80° C. or higher, polyethylene terephthalate resin, polypropylene resin, polymethyl methacrylate, polycarbonate resin, polyamide resin, nylon 66, vinylidene fluoride, 4-fluoroethylene, 3-chlorofluoroethylene, 4-methylpentene-1 resin, polysulfone resin, polyphenyl oxide resin, etc. can be used.

[0025] A known lamination method such as dry lamination, wet lamination, non-solvent lamination, wax lamination, or thermal lamination can be used as a method for laminating the thermoplastic resin layer 4. The thermoplastic resin layer 4 may also be laminated using a known coating device.

[0026] Here, a description will be given of the surface property parameters, etc., of the surface 4s of the upper side UP of the thermoplastic resin layer 4. The surface 4s of the upper side UP of the thermoplastic resin layer 4 has a static friction coefficient and a dynamic friction coefficient of 1 or more, a maximum height Rz of 3 μm or less, and an arithmetic mean roughness Ra of 0.3 μm or less.

[0027] By setting the static and dynamic friction coefficients of the upper UP surface 4s of the thermoplastic resin layer 4 to 1 or more, it is possible to realize a decorative sheet 10 that is not easily slippery against a person's fingers. The static and dynamic friction coefficients of the upper UP surface 4s of the thermoplastic resin layer 4 vary depending on the material of the thermoplastic resin layer 4 and the surface roughness of the uneven shape of the upper UP surface 4s of the thermoplastic resin layer 4.

[0028] For example, when the surface 4s of the upper UP of the thermoplastic resin layer 4 has an uneven shape and the surface 4s of the upper UP of the thermoplastic resin layer 4 is rubbed with a finger, the static friction coefficient and the dynamic friction coefficient change depending on the uneven shape and how the finger catches. The uneven shape of the surface 4s of the upper UP of the thermoplastic resin layer 4 and how the finger catches change depending on the surface roughness of the surface 4s of the upper UP of the thermoplastic resin layer 4, etc.

[0029] If the surface roughness of the upper UP surface 4s of the thermoplastic resin layer 4 is large, the surface 4s may feel uneven to the finger and may have a poor tactile feel. Here, the upper UP surface 4s of the thermoplastic resin layer 4 has a maximum height Rz of 3 μm or less and an arithmetic mean roughness Ra of 0.3 μm or less, so that the deterioration of the tactile feel is suppressed and the surface 4s can have a sufficient tactile feel as a decorative sheet used for interior materials, furniture, etc.

[0030] The primer layer 5 is a layer provided on the lower side LO of the base fabric layer 1. The primer layer 5 is a layer provided for the purpose of improving the adhesion between the base fabric layer 1 of the decorative sheet 10 and the substrate 20 when the decorative sheet 10 and the substrate 20 are bonded together.

[0031] The primer layer 5 may be made of a polyester resin, a urethane resin, an acrylic resin, or the like. The primer layer 5 may be laminated by a known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing, or a forming method using a known coating device. The primer layer 5 may also be formed by a melt extrusion molding method.

[0032] In cases where sufficient adhesion is achieved between the decorative sheet 10 and the substrate 20 without the provision of a primer layer 5, the decorative sheet 10 does not need to be provided with a primer layer 5.

[0033] According to the decorative sheet 10 and decorative member 100 of this embodiment, in the thermoplastic resin layer 4 provided on the upper side UP of the original fabric layer 1, the surface 4s of the upper side UP of the thermoplastic resin layer 4 has a static friction coefficient and a dynamic friction coefficient of 1 or more, a maximum height Rz of 3 μm or less, and an arithmetic mean roughness Ra of 0.3 μm or less.

[0034] As a result, it is possible to provide a decorative sheet 10 and a decorative member 100 that are less likely to cause slipping of a person's fingers.

[0035] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like within the scope of the present invention are also included. In addition, the components shown in the above-mentioned embodiment and the modified examples shown below can be appropriately combined to form a configuration.

[0036] (Variation 1) In the above embodiment, the decorative sheet 10 does not have a coating agent or the like applied to the upper surface 4s of the thermoplastic resin layer 4, but the embodiment of the decorative sheet is not limited to this. The decorative sheet may have a coating agent or the like applied to the upper surface of the thermoplastic resin layer.

[0037] In the decorative sheet, the surface that people touch needs to have a static and dynamic friction coefficient of 1 or more, a maximum height Rz of 3 μm or less, and an arithmetic mean roughness Ra of 0.3 μm or less. For example, by applying a hard coating agent to the upper surface of the thermoplastic resin layer, a decorative sheet with a surface static and dynamic friction coefficient of 1 or more, a maximum height Rz of 3 μm or less, and an arithmetic mean roughness Ra of 0.3 μm or less can be realized.

[0038] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.

[0039] Example 1 A polyolefin sheet having a thickness of 100 μm was used as the base fabric layer 1, and a urethane ink (manufactured by Toyo Ink Co., Ltd.) was printed on the upper side UP of the base fabric layer 1 by gravure printing to form a picture pattern layer 2.

[0040] A 75 μm thick polyethylene terephthalate sheet having an arithmetic mean roughness Ra of the upper UP surface 4s of the upper UP of the picture pattern layer 2 or less and coated with a hard coating agent was attached by dry lamination as a thermoplastic resin layer 4 to the upper UP of the picture pattern layer 2 to obtain the decorative sheet 10 of Example 1.

[0041] Example 2 The decorative sheet of Example 2 was obtained by the same method as Example 1, except that a 75 μm thick polyethylene terephthalate sheet having an arithmetic mean roughness Ra of the upper UP surface 4s of 0.3 μm or less and coated with a hard coating agent on the upper UP surface 4s was attached to the upper UP of the design layer 2 by dry lamination as a thermoplastic resin layer 4.

[0042] Comparative Example 1 A decorative sheet of Comparative Example 1 was obtained in the same manner as in Example 1, except that no thermoplastic resin layer 4 was provided on the upper side of the picture design layer, and instead a polypropylene clear layer, a surface protective layer and a thermosetting resin layer were provided.

[0043] The polypropylene clear layer in Comparative Example 1 was formed by laminating polypropylene resin (manufactured by SunAllomer Co., Ltd.) to a thickness of 70 μm on the upper side of the picture design layer using an extruder. At the same time as extruding the resin, an embossing plate was used to form an uneven portion on the upper surface of the polypropylene clear layer so that the arithmetic mean roughness Ra of the upper surface of the polypropylene clear layer was 1 μm or less.

[0044] The surface protective layer in Comparative Example 1 was formed by applying a thermosetting resin (acrylic urethane resin manufactured by DIC Corporation) at a coating amount of 4.0 to 5.0 g / m2 on the upper surface of the polypropylene clear layer. 2 The coating was applied so as to form the film.

[0045] The thermosetting resin layer in Comparative Example 1 was formed by applying a thermosetting resin (a silicone-modified acrylic urethane resin manufactured by Toyo Ink Co., Ltd.) on the upper surface of the surface protective layer in an amount of 2.5 to 3.5 g / m 2 and cured at 40° C. In this way, the decorative sheet of Comparative Example 1 was obtained.

[0046] Comparative Example 2 The decorative sheet of Comparative Example 2 was obtained in the same manner as in Comparative Example 1, except that the thickness of the polypropylene clear layer was 90 μm and the arithmetic mean roughness Ra of the upper surface of the polypropylene clear layer was 2 μm or more.

[0047] Comparative Example 3 A decorative sheet of Comparative Example 3 was obtained in the same manner as in Comparative Example 1, except that the arithmetic mean roughness Ra of the upper surface of the polypropylene clear layer was set to 1 μm or more and 2 μm or less.

[0048] Comparative Example 4 The thickness of the polypropylene clear layer is 80 μm, and the coating amount of the surface protection layer is 2.5 to 3.5 g / m 2 A decorative sheet of Comparative Example 4 was obtained in the same manner as in Comparative Example 1, except that a thermosetting resin manufactured by DIC Corporation was used for the thermosetting resin layer.

[0049] (Experiment 1) A tactile evaluation test was conducted on the decorative sheets of Example 1-2 and Comparative Example 1-4. In the tactile evaluation test, 10 examiners performed a sensory test on the tactile feel of the upper surface of the decorative sheet, and evaluated the ease of slipping with fingers. In the tactile evaluation test, the examiners moved their hands while touching the upper surface of the decorative sheet, and gave scores in order of ease of slipping with fingers, assigning 1 point to the decorative sheet of Example 1-2 and Comparative Example 1-4 that was the most slippery with fingers, 2 points to the next most slippery, and the total score given by the 10 examiners was evaluated. The evaluation criteria were three-level, with a rating of 〇 or above being considered a pass. 〇: Total score is 41 or more. △: Total score is between 11 and 40 points. ×: Total score is 10 or less.

[0050] (Experiment 2) A friction coefficient measurement test was carried out on the decorative sheets of Example 1-2 and Comparative Example 1-4. In the friction coefficient measurement test, a static and dynamic friction tester (TL201Tt manufactured by Trinity Lab Co., Ltd.) was used, and the static and dynamic friction coefficients were calculated from the static and dynamic friction forces measured using a rubber pressure finger simulating a human finger.

[0051] (Experiment 3) A maximum height measurement test was carried out on the decorative sheets of Example 1-2 and Comparative Example 1-4. In the maximum height measurement test, a laser microscope (Olympus Corporation: LEXT OLS4100) was used to calculate the maximum height Rz. Specifically, the roughness curve of the uneven portion on the upper surface of the decorative sheet was extracted, and the maximum value from the reference line to the convex portion (the apex of the mountain of the roughness curve) and the maximum value from the reference line to the concave portion (the bottom point of the valley of the roughness curve) were added together to calculate the maximum height Rz.

[0052] (Experiment 4) An arithmetic mean roughness measurement test was carried out on the decorative sheets of Example 1-2 and Comparative Example 1-4. In the arithmetic mean roughness measurement test, a laser microscope (Olympus Corporation: LEXT OLS4100) was used to calculate the arithmetic mean roughness Ra. Specifically, the roughness curve of the uneven portion on the upper surface of the decorative sheet was extracted, and the average value of the uneven state (roughness) over the reference length was calculated.

[0053] (Experimental Results) The results of Experiments 1-4 are shown in Table 1. In the results of Experiment 1 shown in Table 1, the numbers in parentheses indicate the total score in the tactile evaluation. In Experiment 1, Example 1-2, which had a static friction coefficient and dynamic friction coefficient of 1 or more, a maximum height Rz of 3 μm or less, and an arithmetic mean roughness Ra of 0.3 μm or less, showed good results.

[0054] [Table 1] [Explanation of symbols]

[0055] 100 Decorative materials 10 Decorative Sheet 1 Original layer 2. Pattern layer 3 Adhesive layer 4 Thermoplastic resin layer 5 Primer layer 4s Upper surface of thermoplastic layer 20 Base material V vertical direction UP upper side LO Lower

Claims

1. The original layer and A thermoplastic resin layer provided on the upper side of the raw fabric layer; Equipped with The upper surface of the thermoplastic resin layer is The static and dynamic friction coefficients are 1 or more; Maximum height Rz is 3 μm or less, The arithmetic mean roughness Ra is 0.3 μm or less. Decorative sheet.

2. The thermoplastic resin layer includes polyethylene terephthalate. The decorative sheet according to claim 1 .

3. The raw fabric layer contains a polyolefin resin. The decorative sheet according to claim 2.

4. A pattern layer is further provided on the upper side of the raw fabric layer by printing a pattern. The decorative sheet according to claim 3.

5. The decorative sheet according to any one of claims 1 to 4, A substrate provided on the lower side of the decorative sheet; Equipped with Cosmetic materials.

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