Basin area member

Abstract

To provide a basin area member which has high hydrophilic nature, matte appearance and can suppress slipperiness.SOLUTION: A basin area member comprises: a substrate; and a coating layer covering the substrate. The coating layer has: a ground layer provided on a surface of the substrate; and a surface layer provided on a part of a surface of the ground layer. The coating layer has: a first area where the ground layer is covered with the surface layer; and a second area where the ground layer is not covered with the surface layer. The surface layer includes: a coating film formed of a cured object of a hydrophilic coating in the first area; and an aggregate formed by aggregation of multiple particles in the coating film. The aggregate has parts where two or more particles overlap in a lamination direction. A ratio of an area of the second area to a total of areas of the first area and second area in viewing along the lamination direction is 1.6% or more and 50% or less in the basin area member.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Aspects of the present invention generally relate to plumbing components. [Background technology]

[0002] It is known that increasing the hydrophilicity of surfaces in wet areas improves cleaning properties. However, increasing the hydrophilicity of a surface can lead to water remaining on the surface, making it slippery. A known solution to this problem is to create unevenness on the surface by embossing or other methods. However, creating unevenness on the surface by embossing or other methods can reduce the degree of freedom in design. Another known method is to create unevenness on the surface by applying a hydrophilic anti-slip film containing particles. However, applying a hydrophilic anti-slip film to the entire surface can result in a glossy appearance, which can cause lighting to be reflected, resulting in poor design. Wet area components are required to have high hydrophilicity, a matte appearance, and be non-slip. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6120249 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made based on the recognition of the above problem, and aims to provide a wet area member that is highly hydrophilic, has a matte appearance, and is non-slip. [Means for solving the problem]

[0005] The first invention is a component to be placed in a wet area, comprising a base material and a coating layer covering the base material, wherein the coating layer has a base layer provided on the surface of the base material and a surface layer provided on a portion of the surface of the base layer, wherein the coating layer has a first region where the base layer is covered by the surface layer and a second region where the base layer is not covered by the surface layer, wherein the surface layer includes a coating film which is a cured product of a hydrophilic paint and an aggregate formed by aggregating a plurality of particles inside the coating film, wherein the aggregate has a portion where two or more of the particles overlap in the stacking direction, and wherein the ratio of the area of ​​the second region to the sum of the area of ​​the first region and the area of ​​the second region when viewed along the stacking direction is 1.6% or more and 50% or less.

[0006] According to this plumbing member, the coating layer covering the base material has a base layer and a surface layer. The surface layer contains a coating film that is a cured product of a hydrophilic coating and particle aggregates, thereby forming a hydrophilic surface. Furthermore, the aggregates contained in the surface layer have portions where two or more particles overlap in the stacking direction. The base layer has a first region covered by the surface layer (i.e., a region with aggregates) and a second region not covered by the surface layer (i.e., a region without aggregates). When viewed along the stacking direction, the ratio of the area of ​​the second region to the sum of the area of ​​the first region and the area of ​​the second region is 1.6% or more and 50% or less. This allows the aggregates to form irregularities on the surface of the coating layer (the surface of the surface layer), resulting in a matte appearance and non-slip properties. Therefore, the product can have high hydrophilicity, a matte appearance, and non-slip properties.

[0007] A second invention is the member for use in a bathroom according to the first invention, wherein the contact angle of the surface of the coating layer with water is 50° or less.

[0008] According to this plumbing component, the contact angle of the coating layer surface with water is 50° or less, which makes it easier for water droplets to collapse and makes water stains less noticeable even after drying. Furthermore, if the base material is provided with a drainage gradient, water droplets spread over a wide area, making it easier to form drainage paths and allowing water to be drained quickly.

[0009] A third invention is a plumbing member according to the first invention, wherein the particles contain acrylic resin.

[0010] According to this plumbing member, the particles contain acrylic resin, which increases the durability of the surface layer, making it resistant to scratches and dirt, and allowing it to maintain its beautiful condition even after long-term use.

[0011] A fourth invention is a water-related component according to the first invention, wherein the coating film contains an acrylic resin.

[0012] According to this plumbing member, the coating film contains acrylic resin, which increases the durability of the surface layer, making it resistant to scratches and dirt, and allowing it to maintain its beautiful condition even after long-term use.

[0013] A fifth invention is a plumbing member according to any one of the first to fourth inventions, wherein the surface of the base has irregularities.

[0014] According to this bathroom component, the surface of the base material has irregularities, which makes it even less slippery. [Effects of the Invention]

[0015] According to the aspects of the present invention, it is possible to provide a wet area member that is highly hydrophilic, has a matte appearance, and is non-slip. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a bathroom equipped with plumbing components according to a first embodiment. [Figure 2] 1 is a cross-sectional view schematically showing the vicinity of a surface of a plumbing member according to a first embodiment. [Figure 3] 1 is a cross-sectional view schematically showing the vicinity of a surface of a plumbing member according to a first embodiment. [Figure 4]3 is an SEM image of the surface of an example of the plumbing member according to the first embodiment. [Figure 5] 3 is an SEM image of the surface of an example of the plumbing member according to the first embodiment. [Figure 6] 3 is an SEM image of the surface of an example of the plumbing member according to the first embodiment. [Figure 7] FIG. 6 is a cross-sectional view schematically showing the vicinity of the surface of a plumbing member according to a second embodiment. [Figure 8] 1 is a table showing the results of Examples and Comparative Examples. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments will be described with reference to the drawings. In the drawings, like components are designated by like reference numerals, and detailed descriptions thereof will be omitted where appropriate.

[0018] (First embodiment) FIG. 1 is a perspective view showing a bathroom equipped with plumbing components according to the first embodiment. As shown in Fig. 1, the plumbing part 100 according to the first embodiment is, for example, a lower counter 510 installed in a bathroom 500. The plumbing part 100 may also be, for example, an upper counter 520 installed in the bathroom 500. The lower counter 510 and the upper counter 520 are installed on the wall surface of the bathroom 500. The lower counter 510 is installed below the upper counter 520.

[0019] The upper surface of the lower counter 510 functions, for example, as a placement surface on which an item can be placed. The upper surface of the lower counter 510 functions, for example, as a seating surface on which a user can sit. The upper surface of the upper counter 520 functions, for example, as a placement surface on which an item can be placed. The side of the upper counter 520 functions, for example, as a backrest surface on which a user can lean their back against.

[0020] 1, bathroom counters such as lower counter 510 and upper counter 520 are shown as examples of plumbing component 100, but plumbing component 100 is not limited to this. In this specification, plumbing component 100 refers to components used in toilets, bathrooms, kitchens, vanities, etc. Examples of plumbing component 100 include, but are not limited to, bathroom wall materials, bathroom floor materials, bathroom counters, bathtubs, bathtub rims, bathroom window materials, bathroom door materials, shower booth wall materials, bathroom mirrors, vanities, washbasins, kitchen sinks, kitchen counters, kitchen doors, storage shelves, storage boards, toilet bowls, toilet seats, warm-water washing toilet seats and their cleaning nozzles, drains, faucets, range hood materials, etc.

[0021] FIG. 2 is a cross-sectional view that schematically shows the vicinity of the surface of the plumbing member according to the first embodiment. FIG. 3 is a cross-sectional view that schematically shows the vicinity of the surface of the plumbing member according to the first embodiment. FIG. 4 is an SEM image of the surface of an example of the plumbing member according to the first embodiment. FIG. 5 is an SEM image of the surface of an example of the plumbing member according to the first embodiment. FIG. 6 is an SEM image of the surface of an example of the plumbing member according to the first embodiment. FIG. 3 is an enlarged view of the region R1 shown in FIG. 2 to 6, the bathroom fixture 100 includes a base material 10 and a coating layer 20. The bathroom fixture 100 has a structure in which the base material 10 is covered with the coating layer 20.

[0022] The substrate 10 is, for example, a portion of the plumbing member 100 that is covered with the coating layer 20. The substrate 10 provides, for example, rigidity to the plumbing member 100. The substrate 10 includes, for example, at least one of metal, ceramic, resin, wood, glass, and rubber. The substrate 10 is, for example, a resin molded body.

[0023] The substrate 10 has, for example, a multilayer structure. In this example, the substrate 10 has a first member 11, a second member 12, and a third member 13. The second member 12 covers the first member 11. The third member 13 covers the second member 12. A surface 13a of the third member 13 forms the surface 10a of the substrate 10. Any of the first member 11, the second member 12, and the third member 13 may be omitted. The substrate 10 may have, for example, a single-layer structure.

[0024] The first member 11, the second member 12, and the third member 13 each contain, for example, a resin. The first member 11 contains, for example, a foamed plastic. Examples of foamed plastic include foamed polypropylene, foamed polystyrene, foamed polyethylene, and foamed polyurethane. The second member 12 contains, for example, at least one of polyolefin (such as polypropylene, polyethylene, and ethylene-vinyl acetate copolymer resin), urethane resin, silicone resin, and vinyl chloride. The second member 12 is, for example, a sheet containing an olefin-based thermoplastic elastomer (a so-called TPO sheet). The third member 13 is, for example, polypropylene. The third member 13 is, for example, a film containing unstretched polypropylene (a so-called CPP film).

[0025] The coating layer 20 covers the surface 10a of the base material 10. The coating layer 20 has irregularities on the surface 20a. The coating layer 20 is provided on the outermost surface of the bathroom component 100. The surface 20a of the coating layer 20 forms the surface 100a of the bathroom component 100.

[0026] The coating layer 20 has an underlayer 21 and a surface layer 22. The underlayer 21 is provided on the surface 10a of the substrate 10. The surface layer 22 is provided on a portion of the surface 21a of the underlayer 21. In other words, the surface layer 22 covers a portion of the underlayer 21.

[0027] More specifically, as shown in FIGS. 3 to 6, the coating layer 20 has a first region 20p and a second region 20q. The first region 20p is a region where the base layer 21 is covered with the surface layer 22. The second region 20q is a region where the base layer 21 is not covered with the surface layer 22. That is, in the second region 20q, the base layer 21 is exposed from the surface layer 22. In the first region 20p, the surface 22a of the surface layer 22 constitutes the surface 20a of the coating layer 20. In the second region 20q, the surface 21a of the base layer 21 constitutes the surface 20a of the coating layer 20. In FIG. 5, the region shown in black is the first region 20p, and the region shown in white is the second region 20q.

[0028] The underlayer 21 includes, for example, a resin. The underlayer 21 includes, for example, at least one of an acrylic resin, an ethylene vinyl acetate resin, a urethane resin, an epoxy resin, a vinyl chloride-vinyl acetate copolymer resin, a silicone-modified urethane resin, and a silane-based resin-vinyl acetate resin. The underlayer 21 preferably includes, for example, a vinyl chloride-vinyl acetate copolymer resin, which can improve the adhesion of the surface layer 22 to the substrate 10 due to the toughness and chemical resistance of vinyl chloride and the adhesiveness and plasticity of vinyl acetate.

[0029] The surface layer 22 includes a coating film 221 and aggregates 222. The coating film 221 is a cured product of a hydrophilic paint. The coating film 221 includes, for example, a resin and a hydrophilic compound.

[0030] The coating film 221 contains, for example, at least one of acrylic resin, polyethylene terephthalate, polycarbonate, transparent vinyl chloride, and epoxy resin as a resin. The coating film 221 preferably contains acrylic resin.

[0031] The hydrophilic compound includes, for example, at least one of an anionic functional group and a zwitterionic functional group. The zwitterionic functional group includes both an anionic functional group and a cationic functional group.

[0032] Examples of anionic functional groups include sulfonic acid groups, sulfonate groups, carboxyl groups, and phosphate groups. Among anionic functional groups, sulfonic acid groups and sulfonate groups are preferred due to their high polarity, which is an important factor in achieving hydrophilicity. The surface layer 21 preferably contains more sulfonic acid groups or sulfonate groups on the surface side than on the inner side. Furthermore, the surface layer 21 more preferably has sulfonic acid groups or sulfonate groups segregated on the surface side. This allows the surface layer 21 to exhibit high hydrophilicity and maintain that hydrophilicity for a long period of time. The presence of sulfonic acid groups or sulfonate groups in the surface layer 21 can be determined by surface analysis using X-ray photoelectron spectroscopy (XPS). XPS can detect the amount of sulfonic acid groups or sulfonate groups present on the surface of the surface layer 21. Specifically, sulfonic acid groups can be identified from the chemical shift of the 2p orbital peak of sulfur (S) element detected by XPS.

[0033] Specific examples of compounds having at least one of a sulfonic acid group and a sulfonate salt group include 2-((meth)acryloyloxy)ethanesulfonic acid, 3-((meth)acryloyloxy)propane-1-sulfonic acid, sodium or potassium salts of acrylamido tertiary butyl sulfonic acid, methallyl sulfonic acid, sodium or potassium salts of p-styrenesulfonic acid, alkylsulfosuccinic acid alkenyl ether salts, polyoxyethylene (meth)acrylate sulfate ester salts, alkylsulfosuccinic acid alkenyl ester salts, and glycerol-1-allyl-3-alkylphenyl-2-polyoxyethylene sulfate. Particularly preferred compounds having at least one of a sulfonic acid group and a sulfonate salt group are linear alkylsulfonic acids having a (meth)acryloyloxy group and their salts, 2-((meth)acryloyloxy)ethanesulfonic acid and 3-((meth)acryloyloxy)propane-1-sulfonic acid. This allows for a highly durable coating film.

[0034] A known hydrophilic paint can be used as the paint for forming the hydrophilic surface layer 22. For example, the paints described in JP 2015-212324 A, JP 2014-218612 A, JP 2014-198754 A, and JP 2014-111745 A can be used.

[0035] The aggregates 222 are located inside the coating film 221. The aggregates 222 are dispersed, for example, inside the coating film 221. The aggregates 222 have a structure in which a plurality of particles 222x are aggregated. The aggregates 222 have a portion where two or more particles 222x overlap in the stacking direction. The aggregates 222 may have a portion where two or more particles 222x do not overlap in the stacking direction. In other words, in the aggregates 222, at least two particles 222x overlap in the stacking direction. The stacking direction is the direction connecting the substrate 10 and the coating film 20. In Figures 2 and 3, the stacking direction is the up-and-down direction.

[0036] The particles 222x include, for example, at least one of silica, acrylic resin, urethane resin, and polycarbonate. The particles 222x preferably include acrylic resin. The average particle size of the particles 222x is, for example, 5 μm or more and 30 μm or less. The amount of the particles 222x added is, for example, 15 wt % or more and 30 wt % or less with respect to the materials of the surface layer 22 other than the particles 222x.

[0037] The convex portions of the unevenness on the surface 20a of the coating layer 20 are formed by the coating film 221 and the aggregates 222 located in the first region 20p. The concave portions of the unevenness on the surface 20a of the coating layer 20 are formed by the base layer 21 located in the second region 20q.

[0038] The ratio of the area S2 of the second region 20q to the sum of the area S1 of the first region 20p and the area S2 of the second region 20q when viewed along the stacking direction (S2 / (S1+S2), hereinafter referred to as the area ratio) is 1.6% or more and 50% or less. The area ratio is preferably 5% or more and 48% or less. The area ratio is more preferably 10% or more and 35% or less. The area of ​​each region is measured, for example, by scanning electron microscope energy dispersive X-ray spectroscopy (SEM-EDX). More specifically, for example, an image such as that shown in FIG. 5 is obtained by detecting elements (e.g., chlorine atoms) contained in the underlayer 21 but not contained in the surface layer 22 by elemental map analysis using SEM-EDX, and the proportion of the second region 20q where the underlayer 21 is exposed can be calculated as the area ratio using image analysis software.

[0039] For example, the area ratio of the second region 20q can be adjusted to a desired value by adjusting the type, average particle size, amount of the particles 222x, etc. For example, when a large amount of the particles 222x is added, the degree of aggregation of the particles 222x is likely to be high. For example, when the degree of aggregation of the particles 222x is high (i.e., when the proportion of the particles 222x forming the aggregates 222 is high), the aggregates 222 are likely to be large, and the convex portions formed by the coating film 221 and the aggregates 222 in the first region 20p are likely to be large. For example, when the convex portions are large, the coating film 221 is likely to be thin, and the area ratio of the second region 20q is likely to be large. Furthermore, the area ratio of the second region 20q can be adjusted to a desired value by adjusting the amount of material applied when forming the surface layer 22. For example, when a small amount of material is applied, the coating film 221 is likely to be thin, and the area ratio of the second region 20q is likely to be large.

[0040] The maximum thickness T of the surface layer 22 in the first region 20p is preferably greater than, for example, twice the average particle size of the particles 222x. The average value of the maximum thickness T is preferably greater than, for example, twice the average particle size of the particles 222x. The maximum thickness T can be determined, for example, by observing a cross section of the surface layer 22 with a microscope.

[0041] The contact angle of the surface 20a of the coating layer 20 with water is preferably 50° or less, and more preferably 40° or less. The contact angle with water is measured in accordance with JIS R 3257:1999. The contact angle with water can be measured, for example, using an automatic contact angle meter (DM-701, manufactured by Kyowa Interface Science Co., Ltd.).

[0042] The plumbing member 100 can be manufactured, for example, by the following procedure. First, in a first step, a base layer 21 is provided on the surface 13a of the third member 13 by die coating or the like, thereby preparing an intermediate member including the third member 13 and the base layer 21. Next, in a second step, the intermediate member (the third member 13 and the base layer 21) is attached to the surface of the first member 11 via the second member 12 by thermal lamination or the like, thereby producing a base member including the first member 11, the second member 12, the third member 13, and the base layer 21. Next, in a third step, a surface layer 22 is provided on the surface of the base member (surface 21a of the base layer 21) by spray painting or the like. This produces a plumbing member 100 in which the base material 10 including the first member 11, the second member 12, and the third member 13 is covered with the coating layer 20 including the base layer 21 and the surface layer 22.

[0043] The following describes the effects of the plumbing member 100 according to the first embodiment. It is known that increasing the hydrophilicity of surfaces in wet areas improves cleaning properties. However, increasing the hydrophilicity of a surface can lead to water remaining on the surface, making it slippery. A known solution to this problem is to create unevenness on the surface by embossing or other methods. However, creating unevenness on the surface by embossing or other methods can reduce the degree of freedom in design. Another known method is to create unevenness on the surface by applying a hydrophilic anti-slip film containing particles. However, applying a hydrophilic anti-slip film to the entire surface can result in a glossy appearance, which can cause lighting to be reflected, resulting in poor design. Wet area components are required to have high hydrophilicity, a matte appearance, and be non-slip.

[0044] In contrast, in the bathroom component 100 according to the first embodiment, the coating layer 20 covering the base material 10 has a base layer 21 and a surface layer 22, and the surface layer 22 contains a coating film 221 which is a cured product of a hydrophilic paint and an aggregate 222 of particles 222x, so that the coating film 221 can form a hydrophilic surface. Furthermore, the aggregates 222 contained in the surface layer 22 have portions where two or more particles 222x overlap in the stacking direction, the base layer 21 has first regions 20p covered by the surface layer 22 (i.e., regions where the aggregates 222 are present) and second regions 20q not covered by the surface layer 22 (i.e., regions where the aggregates 222 are absent), and the ratio of the area of ​​the second regions 20q to the total area of ​​the first regions 20p and the second regions 20q when viewed along the stacking direction is 1.6% or more and 50% or less, whereby the aggregates 222 form unevenness on the surface 20a of the coating layer 20 (surface 22a of the surface layer 22), resulting in a matte appearance and anti-slip properties. Therefore, the coating layer 20 can have a high hydrophilicity, a matte appearance, and anti-slip properties.

[0045] In addition, in the plumbing member 100, the contact angle of the surface 20a of the coating layer 20 with water is 50° or less, which makes it easier for water droplets to collapse and makes water stains less noticeable even after drying. Furthermore, if the base material 10 has a drainage gradient, water droplets spread over a wide area, making it easier to form drainage paths and allowing water to be drained quickly.

[0046] Furthermore, in the plumbing member 100, the particles 222x contain acrylic resin, which can increase the durability of the surface layer 22. This makes it less susceptible to scratches and dirt, allowing it to maintain a beautiful appearance even after long-term use.

[0047] Furthermore, in the plumbing member 100, the coating film 221 contains acrylic resin, which can increase the durability of the surface layer 22. This makes it resistant to scratches and dirt, allowing it to maintain its beautiful condition even after long-term use.

[0048] (Second embodiment) FIG. 7 is a cross-sectional view that schematically shows the vicinity of the surface of a plumbing member according to the second embodiment. As shown in FIG. 7, the bathroom component 200 according to the second embodiment is the same as the bathroom component 100 according to the first embodiment, except that the surface shapes of the base material 10 (third component 13) and the foundation layer 21 are different.

[0049] In the bathroom fixture 200, the surface 10a of the base material 10 has irregularities. More specifically, the surface 13a of the third layer 13 has irregularities. The irregularities on the surface 10a of the base material 10 are formed by, for example, graining.

[0050] The bathroom component 200 can be manufactured in the same manner as the manufacturing method of the above-mentioned bathroom component 100, except that in the second step, unevenness is formed on the surface 21a of the base layer 21 and the surface 13a of the third layer 13 by embossing or the like from above the base layer 21.

[0051] The plumbing part 200 according to the second embodiment can also achieve the same effects as the plumbing part 100 according to the first embodiment.

[0052] Furthermore, in the bathroom fixture 200, the surface 10a of the base material 10 has irregularities, which makes it even less slippery.

[0053] <Examples and Comparative Examples> (Sample preparation) The sample was prepared as follows. First, a first solution was prepared by mixing 0.40 parts by weight of sulfopropyl methacrylate potassium salt and 2.6 parts by weight of ion-exchanged water. A second solution was prepared by mixing 35.0 parts by weight of dipentaerythritol hexaacrylate (A-DPH manufactured by Shin-Nakamura Chemical Co., Ltd.), 12.0 parts by weight of hydroxyethyl methacrylate, 75.0 parts by weight of methoxyethanol, and 0.70 parts by weight of Irgacure 500 (manufactured by BASF). Next, the first and second solutions were mixed and stirred to prepare a hydrophilic coating material. At this time, the weight concentration of sulfur atoms derived from hydrophilic functional groups consisting of sulfonic acid or its salt contained in the coating film obtained by the hydrophilic coating material was 0.1 wt%. Next, 20.0 parts by mass of acrylic resin beads (Art Pearl SE-020T manufactured by Negami Chemical Industrial Co., Ltd.) with a volume average particle diameter of 20 μm were added to 80.0 parts by mass of the hydrophilic paint, and the mixture was stirred with a stirrer for at least 10 minutes to prepare a coating agent.

[0054] Next, a base member was prepared, with a base layer containing a vinyl chloride / vinyl acetate copolymer resin formed on the surface of a substrate comprising a first component containing expanded polypropylene, a second component made of a TPO sheet, and a third component made of a CPP film. The above coating agent was spray-coated onto the surface of the base member using a spray gun (Meiji Machinery Works, Ltd., Finer II) to prepare a coated substrate. The coating amount shown in Figure 8 was used. The coated substrate was then placed in a hot air drying oven (Yamato Scientific Co., Ltd., DKN402) and heated at a drying temperature of 60°C for 6 minutes to volatilize the solvent and prepare a dried substrate. The dried substrate was then removed from the hot air drying oven and cured with an ultraviolet light source (Panasonic Electric Works, Ltd., ANUP4154) at an integrated light dose of 1000 mJ / cm. 2 The resin was cured by irradiating it with ultraviolet light of 1000 kJ / cm 2 , and a surface layer was formed on the surface of the base member to prepare a sample.

[0055] (Determining the presence or absence of aggregates) The presence or absence of aggregates was determined as follows. For each sample, a tabletop scanning electron microscope (Neoscope JCM-7000, manufactured by JEOL Ltd.) was used to obtain SEM images of the surface and cross section under the following conditions. The obtained SEM images were visually inspected for the presence or absence of aggregates formed by the aggregation of multiple particles. If aggregates were visually observed, they were evaluated as "present," and if no aggregates were visually observed, they were evaluated as "absent." The results are shown in Figure 8. SEM imaging conditions Detection signal: SED Incident voltage: 15.0 kV Irradiation current: Map-PC Vacuum mode: HighVac.

[0056] (Measurement of the area ratio of the second region) The area ratio of the second region was measured as follows. First, each sample was subjected to Pt sputtering for 1 minute 30 seconds using a magnetron sputtering machine (MSP-1S, manufactured by Vacuum Devices Co., Ltd.). Next, a tabletop scanning electron microscope (Neoscope JCM-7000, manufactured by JEOL Ltd.) was used to acquire SEM images of the surface under the same conditions as above. SEM images were then obtained using SEM-EDX elemental map analysis to detect chlorine atoms. Image analysis software (WinROOF) was used to calculate the ratio of the area of ​​the region containing chlorine atoms (second region) to the sum of the area of ​​the region not containing chlorine atoms (first region) and the area of ​​the region containing chlorine atoms (second region). The results are shown in Figure 8.

[0057] (Evaluation of hydrophilicity) The hydrophilicity was evaluated as follows. First, the surface of each sample was washed with distilled water and dried. Next, an automatic contact angle meter (DM-701, manufactured by Kyowa Interface Science Co., Ltd.) was used to measure the contact angle of each sample at three points using the θ / 2 method one second after a 1 μL drop of water was dropped at room temperature, and the average of the contact angles at the three points was calculated. A contact angle of 50° or less was rated as "pass," and a contact angle of more than 50° was rated as "fail." The results are shown in Figure 8.

[0058] (Evaluation of matte finish) The matte finish was evaluated as follows. For each sample, the gloss was measured three times using a glossmeter (Polygloss KT-GL0030 manufactured by Therminport Quality Control) at an incident angle of 60°, and the average of the three gloss measurements was calculated. A gloss average of 3GU or less was rated "pass," and a gloss average exceeding 3GU was rated "fail." The results are shown in Figure 8.

[0059] (Slip resistance rating) The evaluation of slip resistance was carried out as follows. The CSR·B value was measured for each sample using a slip tester (OY·PSM manufactured by Tohoku Sokki Co., Ltd.). The measurement method was to place the sample in a predetermined position and apply a turbid liquid of test powder type 1 and type 4 described in JIS Z 8901:2006 and tap water at a concentration of approximately 400 g / mm2 onto the surface of the sample. 2 The CSR·B value was calculated from the maximum tensile load (Pmax) and minimum tensile load (Pmin) obtained when the sample was pulled diagonally upward at an angle of 18° while a vertical load (785 N) was applied to the sliding piece. The CSR·B value was measured three times for each sample, and the average of the three CSR·B values ​​was calculated. A CSR·B value of 1.1 or greater was deemed "pass," while a CSR·B value of less than 1.1 was deemed "fail." The results are shown in Figure 8.

[0060] As shown in Fig. 8, in Examples 1 to 6 in which the area ratio of the second region was 1.6% or more and 50% or less, the hydrophilicity, matte feel, and slip resistance were all "pass." In contrast, in Comparative Example 1 in which the area ratio of the second region was 55.759%, the matte feel and slip resistance were "pass," but the hydrophilicity was "fail." Furthermore, in Comparative Example 2 in which the area ratio of the second region was 1.535%, the hydrophilicity was "pass," but the matte feel and slip resistance were "fail."

[0061] This suggests that if the area ratio of the second region is 1.6% or more and 50% or less, the surface will be highly hydrophilic, have a matte appearance, and be less slippery.

[0062] Embodiments may include the following features.

[0063] (Configuration 1) A component to be placed around water, A substrate; a coating layer covering the substrate; Equipped with the coating layer has a base layer provided on a surface of the base material and a surface layer provided on a part of a surface of the base layer, the covering layer has a first region in which the base layer is covered by the surface layer and a second region in which the base layer is not covered by the surface layer, the surface layer includes a coating film that is a cured product of a hydrophilic coating material, and an aggregate in which a plurality of particles are aggregated inside the coating film, The aggregate has a portion where two or more of the particles overlap in the stacking direction, A plumbing member, wherein a ratio of the area of ​​the second region to the total area of ​​the first region and the second region when viewed along the stacking direction is 1.6% or more and 50% or less.

[0064] (Configuration 2) 2. The member for use in a bathroom according to claim 1, wherein the contact angle of the surface of the coating layer with water is 50° or less.

[0065] (Configuration 3) 3. The plumbing member according to claim 1, wherein the particles contain an acrylic resin.

[0066] (Configuration 4) 4. The plumbing member according to any one of configurations 1 to 3, wherein the coating film contains an acrylic resin.

[0067] (Configuration 5) 5. The bathroom member according to any one of configurations 1 to 4, wherein the surface of the base material has irregularities.

[0068] As described above, according to the embodiment, a wet area member that is highly hydrophilic, has a matte appearance, and is non-slip is provided.

[0069] The above describes the embodiments of the present invention. However, the present invention is not limited to these descriptions. Design modifications made by a person skilled in the art to the above-described embodiments are also included within the scope of the present invention as long as they incorporate the features of the present invention. For example, the shape, dimensions, materials, and arrangement of each element of the plumbing components are not limited to those illustrated and can be modified as appropriate. Furthermore, the elements of each of the above-described embodiments can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they include the features of the present invention. [Explanation of symbols]

[0070] 10: Base material 10a: surface 11: First member 12: Second member 13: Third member 13a: Surface 20: Covering layer 20a: Surface 20p: 1st area 20q:Second area 21: Base layer 21a: Surface 22: Surface layer 22a: Surface 221: Paint film 222: Aggregate 222x: Particle 100:Water-related materials 100a: Surface 500: Bathroom 510: Lower counter 520: Upper counter T: Thickness

Claims

1. A component to be placed around water, A substrate; a coating layer covering the substrate; Equipped with the coating layer has a base layer provided on a surface of the base material and a surface layer provided on a part of a surface of the base layer, the covering layer has a first region in which the base layer is covered with the surface layer and a second region in which the base layer is not covered with the surface layer, the surface layer includes a coating film that is a cured product of a hydrophilic coating material, and an aggregate in which a plurality of particles are aggregated inside the coating film, the aggregate has a portion where two or more of the particles overlap in the stacking direction, A water-related component, wherein the ratio of the area of ​​the second region to the sum of the area of ​​the first region and the area of ​​the second region when viewed along the stacking direction is 1.6% or more and 50% or less.

2. 2. The member for use in a water supply system according to claim 1, wherein the contact angle of the surface of the coating layer with water is 50° or less.

3. The plumbing member according to claim 1 , wherein the particles contain an acrylic resin.

4. The plumbing member according to claim 1 , wherein the coating film contains an acrylic resin.

5. The water-related member according to any one of claims 1 to 4, wherein the surface of the base material has irregularities.

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