Resin member having texture resembling natural material, and resin material and resin member including recycled ceramic material

Abstract

Provided is a resin member having a texture resembling a natural material. The present invention also provides a wet area member resin material which has desirable characteristics and in which a recycled material such as crushed recycled ceramic material is used, and a wet area member produced from the same. The resin member having a texture resembling a natural material can be provided by setting the average value of the surface roughness Sa (ISO 25178) at three or more measurement points on the surface of the resin member to 5.0 μm or more, and the standard deviation thereof to 1.00 or more. A good wet area member in which a recycled material is used can be produced by using, as a raw material, a wet area member resin material characterized by including at least (a) a polyolefin-based resin, (b) a recycled material which is a ceramic powder, and (c) a polyolefin-based compatibilizer, and characterized in that, defining the total amount of (a) and (b) as 100 parts by weight, (c) is contained in the range of 0.1-4.0 parts by weight, and the ratio of (a) and (b) is in the range of 0.1:99.9 to 20:80.

Description

Resin materials and resin components that have the texture of natural materials, including recycled ceramic materials.

[0001] This invention relates to resin components that have the texture of natural materials. Furthermore, this invention relates to resin materials and resin components for plumbing fixtures that include crushed ceramic powder as a recycled material.

[0002] To reduce environmental impact, various industrial sectors are employing methods for reusing waste. In the field of ceramics manufacturing, for example, in the production of sanitary ware, waste generated during the manufacturing process is being reused and recycled.

[0003] Ceramic waste, such as crushed defective sanitary ware, is used as a recycled material for various purposes. For example, it is added to plastic materials as a filler (Japanese Patent Publication No. 2014-202058 (Patent Document 1)).

[0004] Furthermore, the surface of resin components is usually uniformly smooth, and even if a treatment is applied to deliberately reduce its smoothness and create a matte finish, the treatment is applied uniformly to the surface. Such surfaces give an artificial aesthetic and impression. On the other hand, efforts have been made to achieve a texture similar to that of natural materials (for example, Japanese Patent Application Publication No. 2022-170524 (Patent Document 2), Japanese Patent No. 7264560 (Patent Document 3)). In addition, proposals have been made for resin molded products that have little difference in appearance and texture from ceramics (Japanese Patent Application Publication No. 2023-37706 (Patent Document 4)) and resin molded products that have an appearance surface in which the visibility of color unevenness is suppressed (Japanese Patent Application Publication No. 2022-175607 (Patent Document 5)).

[0005] Japanese Patent Publication No. 2014-202058, Japanese Patent Publication No. 2022-170524, Japanese Patent No. 7294560, Japanese Patent Publication No. 2023-37706, Japanese Patent Publication No. 2022-175607

[0006] The inventors have now discovered that by creating a specific uneven surface on the resin, it is possible to create a resin component that gives the impression of a natural or organic material, unlike the uniformly smooth surface of artificial resin components. In particular, they found that this surface state can be advantageously achieved by adding particles to the resin.

[0007] Furthermore, the inventors have now discovered a composition that enables the creation of a resin material for plumbing fixtures with desirable properties when reusing ceramic powder as a filler in a polyolefin resin. This invention is based on these findings.

[0008] Therefore, the present invention aims to provide a resin component that gives the impression of a natural or organic material, unlike the uniformly smooth or surface-treated artificial resin component surface.

[0009] Furthermore, the present invention aims to provide a resin material for plumbing fixtures that possesses desirable properties while using recycled materials, and plumbing fixtures manufactured therefrom.

[0010] Furthermore, the resin member according to the present invention is a resin member having irregularities on its surface, characterized in that the average value of the surface roughness Sa (ISO 25178) at at least three measurement points on the surface of the resin member is 5.0 μm or more, and the standard deviation thereof is 1.00 μm or more.

[0011] Furthermore, the resin material for plumbing components according to the present invention comprises at least (a) a polyolefin resin, (b) a recycled material which is ceramic powder, and (c) a polyolefin compatibilizer, wherein when the total amount of (a) the polyolefin resin and (b) the recycled material is 100 parts by weight, the (c) polyolefin compatibilizer is contained in an amount of 0.1 to 4.0 parts by weight, and the ratio of (a) the polyolefin resin to (b) the recycled material is in the range of 0.1:99.9 to 20:80.

[0012] Furthermore, the plumbing components according to the present invention are manufactured from the resin material for plumbing components according to the present invention.

[0013] A resin component is provided that has a texture similar to that of a natural or organic material, unlike the uniformly smooth surface of an artificial resin component.

[0014] Furthermore, according to the present invention, by reusing the powder obtained by crushing ceramics, it is possible to contribute to reducing the amount of waste from an environmental perspective, and a resin material for plumbing components of good quality is provided.

[0015] This figure illustrates a method for measuring the Sa of a resin component according to the present invention, and the component is a toilet lid. This is an SEM image of the fracture surface of Example 8, which is a resin manufactured using the resin material for plumbing components according to the present invention. This is an SEM image of the fracture surface of the resin of Comparative Example 4.

[0016] Resin member having surface irregularities The resin member according to the present invention has irregularities on its surface, and its surface has the following characteristics. That is, the average value of the surface roughness Sa (ISO 25178) at at least three measurement points on the surface of the resin member is 5.0 μm or more, and its standard deviation is 1.00 μm or more. According to one aspect of the present invention, the average value of Sa is preferably 5.5 μm or more, more preferably 5.8 μm or more, and its upper limit is preferably 12.0 μm or less, and more preferably 10.0 μm or less. Furthermore, the standard deviation is preferably 1.2 μm or more, more preferably 1.5 μm or more, and its upper limit is preferably 5.0 μm or less, and more preferably 3.0 μm or less.

[0017] Resin surfaces are typically uniformly smooth, and even if surface treatments such as blasting are performed, the treatment is homogeneous. Such resin surfaces give an artificial impression. On the other hand, the surface of the resin component according to the present invention has a standard deviation of Sa of 1.00 μm or more, and as a result, the degree of unevenness varies on the surface of the component, giving a texture that is different from an artificial impression and conveys the feel of a natural or organic material. Thus, the resin component according to the present invention has the advantage of being able to add value to the appearance.

[0018] According to a preferred embodiment of the present invention, the standard deviation of Sa is in the range of 20% to 60% of the mean value of Sa (i.e., [(standard deviation of Sa) / (mean value of Sa)] × 100). This variation in the degree of unevenness gives the impression of a natural or organic material texture, rather than an artificial one.

[0019] In the present invention, the measurement of Sa on the surface of the member is performed at least three locations, i.e., three or more locations. According to a preferred embodiment of the present invention, it is performed at least six locations. Here, it is preferable that the positions of the measurement points are not localized on the surface of the resin member, but are substantially evenly distributed, for example, within the range visible when the member is viewed. Furthermore, according to a preferred embodiment of the present invention, the interval between each measurement point is 5 cm or more, preferably points separated by a distance of 10 cm or more, and more preferably points separated by a distance of 15 cm or more.

[0020] The specific measurement method will be explained using drawings. Figure 1 is a top view of the toilet lid 1, which is made of the resin material according to the present invention. The top surface 2 of this lid is divided into six locations, (1) to (6), as shown in Figure 1, and Sa is measured in each region.

[0021] According to a preferred embodiment of the present invention, the surface of the resin member according to the present invention has a standard deviation of 3 GU or more of the 20-degree gloss value at at least three measurement points, more preferably 4 GU or more, and the upper limit is 10 GU or less, more preferably 8 GU or less.

[0022] In another preferred embodiment, the surface of the resin member according to the present invention has a standard deviation of 2 GU or more of the 60-degree gloss value at at least three measurement points, more preferably 2.5 GU or more, with an upper limit of 10 GU or less, more preferably 8 GU or less.

[0023] Furthermore, according to another preferred embodiment, the surface of the resin member according to the present invention has a standard deviation of 5 GU or more of the 80-degree gloss value at at least three measurement points, more preferably 5.5 GU or more, and an upper limit of 15 GU or less, more preferably 12 GU or less.

[0024] In the present invention, the irregularities of the resin member are preferably formed by adding particles that maintain their particle shape during the manufacturing and molding process of the resin member. For example, inorganic particles are added, and the presence of these particles forms irregularities on the surface. In a preferred embodiment, particles that are stronger than the resin material and whose particle size is easy to control are used. In another preferred embodiment of the present invention, the particles are coated with resin so that the resin sits on or adheres to them. By adopting such an embodiment, the durability of the irregularities on the surface of the member can be improved.

[0025] According to a preferred embodiment of the present invention, recycled material, which is ceramic powder contained in the resin material for plumbing fixtures described below, is used as inorganic particles that form surface irregularities on the resin member. By using such recycled material, it is possible to achieve both a natural feel and a reduction in environmental impact. Furthermore, according to one embodiment of the present invention, a resin material using this recycled material is provided, which comprises at least (a) a polyolefin resin, (b) recycled material, which is ceramic powder with a particle size of less than 50 μm as inorganic particles, and (c) a polyolefin compatibilizer, wherein when the total amount of (a) the polyolefin resin and (b) the recycled material is 100 parts by weight, the resin material contains (c) the polyolefin compatibilizer in the range of 0.1 parts by weight or more and less than 5.0 parts by weight. In this embodiment, (a) the polyolefin resin, (b) the recycled material, which is ceramic powder, and (c) the polyolefin compatibilizer may be the same as those described later for the resin material for plumbing fixtures.

[0026] The resin component according to the present invention is preferably used in areas that are easily visible to the user. For example, it can be used as a plumbing component in toilets, such as toilet lids and seats, side panels of flush toilets, outer resin components housing the bidet function unit, bathroom counters, and shower heads. The resin component according to the present invention may also be used partially in areas that are easily visible to the user. In this case, the portion used in areas that are less visible to the user may be made to have properties that are advantageous for plumbing components.

[0027] Resin material for plumbing fixtures The resin material for plumbing fixtures according to the present invention has as its basic composition (a) a polyolefin resin, (b) a recycled material which is ceramic powder, and (c) a polyolefin compatibilizer.

[0028] (a) Polyolefin resins In the present invention, a wide range of polyolefin resins can be used. Preferably, the polyolefin resins are polyethylene, polypropylene, and propylene-α-olefin copolymers, and the polyolefin resin may also be an acid-modified polyolefin resin in which acid-modified groups are grafted. Furthermore, in the present invention, the polyolefin resin may be recycled.

[0029] In the present invention, the molecular weight of the polyolefin resin may be appropriately determined taking into consideration the physical properties and characteristics required for water-related components, as well as the amount of (b) recycled material added. For example, the weight-average molecular weight is preferably 10,000 to 1,000,000.

[0030] (b) Recycled material which is powdered ceramics In the present invention, "recycled material which is powdered ceramics" means powder obtained by crushing ceramics that have been fired from raw material slip, and preferably means celben. In the following, it may also be referred to as "recycled material".

[0031] In this invention, the "recycled material which is ceramic powder" refers to, for example, pottery that was deemed unnecessary or defective during the manufacturing process. This is crushed and reused as powder.

[0032] According to one aspect of the present invention, the composition of the "recycled material" is SiO ２ :20~75% by weight Al ２ O ３ :17 to 75 parts by weight% Fe ２ O ３ :0.4-1.5% by weight CaO: 0.1-2.0% by weight MgO: 0.1-1.5% by weight K ２ O: 0.8 to 5.0% by weight Na ２O: 0.4 to 4.0% by weight, and also contains. Furthermore, since the "recycled material" may be powder of ceramics having a glaze layer, it is permissible that it contains components originating from the glaze layer, and therefore ZnO: 0.1 to 0.5% by weight and / or ZrO ２ It may contain 0.1 to 0.5% by weight of [the substance].

[0033] In the present invention, the average particle size of the recycled material is preferably less than 50 μm, and more preferably 30 μm or less.

[0034] (c) Polyolefin-based compatibilizer In the present invention, the polyolefin-based compatibilizer functions to allow (b) recycled material to be well incorporated into (a) the polyolefin-based resin. As shown in the examples described below, in the present invention, it is observed that the compatibilizer surrounds the particles of (b) recycled material and exists in a state that is compatible with (a) the polyolefin-based resin.

[0035] In the present invention, examples of polyolefin compatibilizers include polyethylene, polypropylene, and propylene-α-olefin copolymers, with acid-modified polyolefin resins grafted with acid-modified groups being preferred. According to the present invention, polypropylene is preferred as the polyolefin resin, and it is preferable that its acid value is 20 or higher. By setting the acid value within this range, it is believed that the function of (b) well surrounding the particles of the recycled material and (a) making it compatible with the polyolefin resin is better exhibited, and (a) the adhesion between the polyolefin resin and (b) the recycled material is improved.

[0036] In the present invention, the molecular weight of the compatibilizer may be appropriately determined taking into consideration the amount of (b) recycled material added and the physical properties and characteristics required for the water-related components, but for example, the weight-average molecular weight is about 10,000 to 1,000,000.

[0037] Resin material for plumbing components The resin material for plumbing components according to the present invention, when the total amount of (a) a polyolefin resin and (b) a recycled material is 100 parts by weight, comprises (c) a polyolefin compatibilizer in an amount of 0.1 part by weight or more and less than 5.0 parts by weight, preferably 0.1 part by weight or more and 4.0 parts by weight or less, and is characterized in that the ratio of (a) the polyolefin resin to (b) the recycled material is in the range of 0.1:99.9 to 20:80. By falling within this range, a resin material for plumbing components having good properties while using a recycled material, and a plumbing component manufactured therefrom can be obtained.

[0038] The resin material for plumbing components according to the present invention allows the recycled material to not significantly adversely affect the physical properties and properties of the polyolefin resin, and can preferably achieve the purpose of adding the recycled material, for example as a filler or reinforcing material. It is considered that such advantages of the resin material for plumbing components according to the present invention are obtained by including a specific amount of (c) the polyolefin compatibilizer together with the recycled material.

[0039] According to one embodiment of the present invention, an advantageous property of plumbing components manufactured from the resin material for plumbing components according to the present invention is that the surface of the component is smooth. As a result, for example, when a plumbing component manufactured from the resin material for plumbing components according to the present invention is used in contact with sanitary ceramic ware, the component has excellent adhesion; and when the component is a movable one (for example, a strainer plate installed at a drain outlet of a urinal), it is less likely to scratch the ceramic surface.

[0040] Furthermore, according to one embodiment of the present invention, an advantageous property of plumbing components manufactured from the resin material for plumbing components according to the present invention is that the component has good heat insulating properties. As a result, for example, when a plumbing component manufactured from the resin material for plumbing components according to the present invention is an inner tank of a flush toilet water tank, the advantage that condensation on the surface of the inner tank is effectively prevented can be obtained.

[0041] Method for producing resin material for plumbing components The resin material for plumbing components according to the present invention is basically produced by melt-mixing (a) a polyolefin resin, (b) a recycled material, and (c) a polyolefin compatibilizer, and is provided, for example, in the form of pellets. Alternatively, the material may be directly used as a raw material for producing plumbing components without going through the pellet form. The melt mixing may be performed by a method using, for example, a single-screw extruder, a twin-screw extruder, a kneader, a Banbury mixer, a roll, or the like.

[0042] According to one aspect of the present invention, it is preferable that (a) the polyolefin resin and (b) the recycled material are first melt-mixed, and then separately melted (c) the polyolefin compatibilizer is mixed for production. This is preferable because the compatibilizer can well surround the particles of (b) the recycled material, be in a state compatible with (a) the polyolefin resin, and improve the adhesion between (a) the polyolefin resin and (b) the recycled material.

[0043] Plumbing Components The plumbing component according to the present invention can be produced as a molded article of a predetermined shape by subjecting the above-described resin material for plumbing components according to the present invention, preferably a material in the form of pellets, to a method such as extrusion molding, injection molding, or sheet molding.

[0044] Examples of the plumbing component according to the present invention include an inner tank of a flush toilet water tank, a strainer plate installed at a drain outlet of a urinal, a toilet seat, a toilet lid, an outer resin component housing a warm water washing toilet seat functional unit, a drain socket, a bathroom counter, a shower head, and a hair catcher component for a wash basin.

[0045] The present invention will be further described by the following examples, but the present invention is not limited to these examples.

[0046] Preparation of celben Celben having a particle size of 1.5 mm or less was prepared, put into a Raymond mill and finely pulverized to obtain celben having an average particle size of 20 μm. The average particle size of the pulverized product was evaluated using LA-350 manufactured by Horiba, Ltd.

[0047] Evaluation test methods and criteria (1) Flexural modulus and flexural strength Measured in accordance with JIS K7171. The test conditions were a test speed of 10 mm / min, and the number of tests N was 10. For flexural modulus, 2100 MPa or higher was evaluated as good, and for flexural strength, 43 MPa or higher was evaluated as good. (2) Charpy impact strength Measured in accordance with JIS K7111. The number of tests N was 10. And 2.5 kJ / m ２ or higher was evaluated as good.

[0048] Examples 1 and 2 and Comparative Example 1 The following resins and sericite were prepared. ・Resin: Polypropylene (manufactured by Prime Polymer Co., Ltd., product number J-882HV) ・Sericite: the particle size sericite prepared above ・Compatibilizer: polypropylene (manufactured by Riken Vitamin Co., Ltd., product number MG-670P, molecular weight 153,000, acid value (mgKOH / g): 23)

[0049] The above resin polypropylene, sericite, and compatibilizer were melt-mixed in the parts by weight described in Table 1 below, and pellet-shaped material was prepared using an extruder (temperature: 210°C, screw rotation speed: 885 rpm). Using this pellet material, a test piece was obtained by an injection molding machine (molding temperature: 190°C). For this test piece, flexural modulus, flexural strength and Charpy impact strength were measured. The results were as shown in Table 1 below.

[0050]

[0051] Examples 3 and 4 and Comparative Example 2 Test pieces were obtained in the same manner as in Examples 1 to 2 and Comparative Example 1, except that polypropylene (manufactured by Riken Vitamin Co., Ltd., product number MG-250P, molecular weight 58,000, acid value (mgKOH / g): 28) was used as the compatibilizer. For this test piece, flexural modulus, flexural strength and Charpy impact strength were measured. The results were as shown in Table 2 below.

[0052]

[0053] Examples 5 and 6 and Comparative Example 3: Test specimens were obtained in the same manner as in Examples 1 and 2 and Comparative Example 1, except that polypropylene (manufactured by Riken Vitamin Co., Ltd., product number MG-400W, molecular weight 36,000, acid value (mgKOH / g): 42) was used as the compatibilizer. The flexural modulus, flexural strength, and Charpy impact strength were measured for these test specimens. The results are shown in Table 2 below.

[0054]

[0055] Comparative Examples 4 and 5: Test specimens were obtained in the same manner as in Example 1, except that no compatibilizer was added and no Celluben was added. The flexural modulus, flexural strength, and Charpy impact strength were measured for these test specimens. The results are shown in Table 4 below.

[0056]

[0057] Observation of fracture surface: Example 8 A test specimen was obtained in the same manner as in Example 5, except that the amount of polypropylene (manufactured by Riken Vitamin Co., Ltd., product number MG-400W, molecular weight 36,000, acid value (mgKOH / g): 42), which is a compatibilizer, was 2 parts by weight. This test specimen was folded, and its fracture surface was observed by SEM. The SEM image is shown in Figure 2.

[0058] The fractured surface of Comparative Example 4, obtained by the Charpy impact strength test, was observed using SEM in the same manner as described above. The SEM image is shown in Figure 3.

[0059] In Figure 2, the circled area appears to contain particles believed to be composed of Al and Si elements. These particles were surrounded by a layer of resin, and their surfaces were smooth. On the other hand, in Figure 3, components believed to be composed of Al and Si elements were also observed within the circled area, but these particles did not appear to be coated with resin.

[0060] Surface roughness Cellben was finely ground using a cylinder mill to obtain Cellben with particle sizes of 12 μm and 50 μm, respectively.

[0061] Example 9 was obtained in the same manner as in Example 8, except that Celluben with a particle size of 12 μm was used. Example 10 was obtained in the same manner as in Example 8, except that the amount of Celluben with a particle size of 20 μm was changed from 20 parts by weight to 10 parts by weight.

[0062] Furthermore, Comparative Example 6 was obtained in the same manner as in Example 8, except that the amount of Celluben with a particle size of 20 μm was changed from 20 parts by weight to 30 parts by weight.

[0063] Furthermore, Comparative Example 7 was obtained in the same manner as in Example 8, except that Celluben with a particle size of 50 μm was used. Comparative Example 8 was obtained by changing the amount of Celluben with a particle size of 50 μm to 30 parts by weight.

[0064] The surface roughness Rz of the obtained test specimens was measured using a contact-type surface roughness meter in accordance with JIS B0601. The results are shown in Table 5 below. Here, surfaces with an Rz value of less than 6.3 were judged to be good.

[0065]

[0066] Comparative Example 9 was obtained by changing the amount of Celluben in Heat Conduction Example 8 to the amount shown in Table 6 below. Comparative Examples 10 to 12 were obtained in the same manner as Example 8, except that the Celluben with a particle size of 50 μm obtained above was used and its amount was changed to the amount shown in Table 6 below. Comparative Example 13 was obtained in the same manner as Example 8, except that Celluben was replaced with talc and no compatibilizer was added.

[0067] From the obtained test specimen, a 10 mm x 10 mm x 4 mm thick section was cut out, and its thermal conductivity was measured using a measuring device (LFA467 HyperFlash, manufactured by Netch Japan Co., Ltd.). The results are shown in Table 6 below. Example 8 showed relatively low thermal conductivity.

[0068]

[0069] Pellet-shaped material was prepared in the same manner as in Example 1, except that the resin component was made with 5%, 19%, or 30% Cellben. Using this pellet material, a toilet lid was manufactured using a Mitsubishi Heavy Industries 850t molding machine at a molding temperature of 190°C. The toilet lid produced had a width of 384 mm between hinges and a length of 555 mm from the tip of the lid to the hinge.

[0070] Sa was measured in accordance with ISO 25178 using a laser microscope equipped with a white light interferometer (KEYENCE VX-X3000). Measurements were performed at locations within areas (1) to (6) shown in Figure 1. Here, the measurement areas (1) to (6) are 10 cm x 15 cm, and the distance between each measurement point was within the range of 5 to 10 cm.

[0071] The gloss was measured using a parallel light gloss meter (VG8000, manufactured by Nippon Denshoku Industries Ltd.) in accordance with the specular gloss measurement method JIS Z 8741. Specifically, the specular gloss at 20 degrees, 60 degrees, and 85 degrees was measured according to Method 5, Method 3, and Method 1 of JIS Z 8741:1997, respectively. The measurement locations were the same as for the measurement of Sa above, within the areas (1) to (6) shown in Figure 1. From the obtained values, the mean and their standard deviations were calculated.

[0072] The mean Sa values ​​and standard deviations for the 5%, 19%, and 30% Celluben products are shown in Table 7 below. The gloss values ​​and their standard deviations are shown in Table 8 below. In addition, as a comparison, commercially available PP resin (J707EG, manufactured by Prime Polymer Co., Ltd.) that does not contain inorganic particles such as Celluben was used to prepare a toilet lid (Comparative Example 14) that was matte coated with a commercially available matte paint, and a toilet lid that was air blast treated (Comparative Example 15), and the Sa values ​​and gloss values ​​of these were measured.

[0073] Evaluation of the Appearance of Resin Components The appearance of the resin components was evaluated as follows. The toilet lid was placed on a toilet bowl in a toilet space, and under LED lighting, ten developers of plumbing products served as evaluation panelists, conducting a visual sensory evaluation. Each panelist scored according to the following criteria, and an overall judgment was made from the average score. A commercially available PP resin (J707EG, manufactured by Prime Polymer Co., Ltd.) that does not contain inorganic particles such as Cellben was included as Comparative Example 16 in the evaluation.

[0074] Evaluation Criteria 3 points: Feels like natural materials. 2 points: Feels somewhat like natural materials, but has a plastic feel. 1 point: Has a very strong plastic feel. Overall Rating ○: Average score of 10 people is between 2.5 and 3.0 △: Average score of 10 people is between 2.0 and 2.5 ×: Average score of 10 people is between 1.0 and 2.0

[0075] The results are shown in the table below.

Claims

1. A resin member having an uneven surface, characterized in that the average value of the surface roughness Sa (ISO 25178) at at least three measurement points on the surface of the resin member is 5.0 μm or more, and the standard deviation thereof is 1.00 μm or more.

2. The resin member according to claim 1, wherein the measurement points are at least six.

3. The resin member according to claim 1 or 2, wherein the interval between the measurement points is 5 cm or more.

4. The resin member according to any one of claims 1 to 3, wherein the resin member comprises particles.

5. The resin material according to claim 4, wherein the particles are inorganic materials.

6. The resin material according to claim 5, wherein the particles of the inorganic material are Cellben.

7. The resin member according to any one of claims 1 to 6, wherein the standard deviation is 20% or more and 60% or less of the mean value of Sa.

8. The resin member according to any one of claims 1 to 7, wherein the standard deviation of the 20-degree gloss values ​​at at least three measurement points on the surface of the resin member is 3 GU or more.

9. The resin member according to any one of claims 1 to 8, wherein the standard deviation of the 60-degree gloss values ​​at at least three measurement points on the surface of the resin member is 2 GU or more.

10. The resin member according to any one of claims 1 to 9, wherein the standard deviation of the 80-degree gloss values ​​at at least three measurement points on the surface of the resin member is 5 GU or more.

11. The resin material according to claim 5, wherein the resin member comprises at least (a) a polyolefin resin, (b) recycled material which is ceramic powder having a particle size of less than 50 μm as inorganic particles, and (c) a polyolefin compatibilizer, and when the total amount of (a) the polyolefin resin and (b) the recycled material is 100 parts by weight, the (c) polyolefin compatibilizer is contained in an amount of 0.1 parts by weight or more and less than 5.0 parts by weight.

12. A resin material for plumbing components, comprising at least (a) a polyolefin resin, (b) a recycled material which is ceramic powder with a particle size of less than 50 μm, and (c) a polyolefin compatibilizer, wherein when the total amount of (a) the polyolefin resin and (b) the recycled material is 100 parts by weight, the (c) polyolefin compatibilizer is contained in an amount of 0.1 parts by weight or more and less than 5.0 parts by weight, and the ratio of (a) the polyolefin resin to (b) the recycled material is in the range of 0.1:99.9 to 20:

80.

13. The resin material for plumbing components according to claim 12, wherein the (c) polyolefin compatibilizer is included in an amount of 0.1 parts by weight or more and 4.0 parts by weight or less per 100 parts by weight of the total amount of the (a) polyolefin resin and the (b) recycled material.

14. The resin material for plumbing components according to claim 12 or 13, wherein the particle size of the recycled material in (b) is 30 μm or less.

15. The resin material for plumbing components according to any one of claims 12 to 14, wherein the recycled material in (b) is Cellben.

16. The resin material for plumbing components according to any one of claims 12 to 15, wherein the (c) polyolefin compatibilizer is polypropylene resin.

17. The resin material for plumbing components according to any one of claims 12 to 16, wherein the acid value of the polyolefin compatibilizer (c) is 20 or higher.

18. A resin material for plumbing components according to any one of claims 12 to 17, in the form of pellets.

19. A plumbing fixture made from a resin material for plumbing fixtures according to any one of claims 12 to 18.

20. The plumbing component according to claim 19, which is an inner water tank for a flush toilet, a drain cover installed in the drain of a urinal, a toilet seat, a toilet lid, an outer resin component housing the bidet toilet seat function unit, a drain socket, a bathroom counter, a shower head, or a hair catcher component for a washbasin.

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