Building material component and building material

Abstract

Provided is a building material component having the surface layer formed on a substrate, wherein: the surface layer has an arithmetic average roughness Ra of the surface of 1.0-10.5 μm; the maximum heat flux QMAX1 is 0.3 W / cm2 or less when a cold heat plate, which is set to 36°C, is brought into contact, at 10 gf / cm2, with the surface layer of the building material component for which the surface temperature is set to 55°C; and the cold heat plate is a pure copper plate in which chloroprene rubber having a thickness of 0.5 mm is adhered to the surface on the side that contacts the surface layer.

Description

Building parts and materials

[0001] The present disclosure relates to building material components and building materials.

[0002] Building materials such as handrails and door handles, which have a surface layer formed on a metal substrate, become very hot in the summer and are therefore easily felt when touched.

[0003] Patent Document 1 describes a building material having a coating film on the surface of a substrate, the coating film being made of a curable resin composition containing crosslinked acrylic fine particles having a particle size of 10 μm or more at 50% of the cumulative value in the particle size distribution measured by a laser diffraction / scattering method. The ten-point average roughness Rz (JIS B 0601:1994), i.e., Rzjis, of the coating film of the building material is 10 μm or more. The building material is also measured by a laser diffraction / scattering method using a 9 cm2 area test set at 30°C. ２ A pure copper plate with a mass of 9.79 g was applied to the coating film at a surface temperature of 20°C with a force of 10 gf / cm ２ When the pure copper plate is brought into contact with the coating, the peak value QMAX of the heat flux transferred to the coating is 0.3 W / cm ２ The following is the result.

[0004] JP 2013-124520 A

[0005] In recent years, matte appearances have become popular, but the building materials described in Patent Document 1 tend to have large unevenness on the surface, which tends to cause variations in the matte finish of the surface, and therefore tend to have a poor design quality in the appearance.

[0006] Therefore, the inventors have found an object to provide a building component that can reduce the feeling of heat and enhance the design of the exterior.

[0007] The present disclosure relates to a component for a building material having a surface layer formed on a base material, the surface layer having an arithmetic mean roughness Ra of 1.0 μm or more and 10.5 μm or less, and the surface temperature of the component for a building material is set to 55° C., and a heating and cooling plate set to 36° C. is applied to the surface layer at a pressure of 10 gf / cm ２ The maximum heat flux QMAX1 when in contact with ２The heating and cooling plate is a pure copper plate with a 0.5 mm thick chloroprene rubber attached to the surface that comes into contact with the surface layer.

[0008] 1 is a cross-sectional view showing an example of a laminate structure of a part for a building material according to an embodiment of the present disclosure; 2 is a cross-sectional view showing a modified example of the laminate structure of a part for a building material according to an embodiment of the present disclosure;

[0009] Hereinafter, embodiments of the present disclosure will be described in detail.

[0010] [Building Material Component] As shown in FIG. 1 , the building material component 10 has a surface layer 12 formed on one side of a substrate 11. Here, the building material component 10 only needs to have the surface layer 12 formed on the substrate 11. For example, the surface layer 12 may be formed on both sides of the substrate 11. The arithmetic mean roughness Ra of the surface S of the surface layer 12 is 1.0 μm or more and 10.5 μm or less, and preferably 4.0 μm or more and 10.5 μm or less. When the arithmetic mean roughness Ra of the surface S of the surface layer 12 is 1.0 μm or more, the surface of the building material component 10 has a matte texture. When the arithmetic mean roughness Ra is 10.5 μm or less, the unevenness of the surface of the building material component 10 is not too large, so the matte texture of the surface of the building material component 10 is uniform. In other words, when the arithmetic mean roughness Ra of the surface S of the surface layer 12 is 1.0 μm or more and 10.5 μm or less, the designability of the appearance of the building material component 10 is enhanced. Furthermore, when the arithmetic mean roughness Ra of the surface S of the surface layer 12 is 1.0 μm or more, the heat is less likely to be felt when the hand touches the surface layer 12. The arithmetic mean roughness Ra of the surface S of the surface layer 12 may be 1.0 μm or more and 8.5 μm or less, or may be 4.0 μm or more and 8.5 μm or less.

[0011] In this specification and claims, the arithmetic mean roughness Ra of the surface of the surface layer is measured by a measurement method conforming to JIS B0601-2001. Here, it is preferable that the arithmetic mean roughness Ra of the surface S of the surface layer 12 measured in a predetermined direction (e.g., the longitudinal direction) and in a direction perpendicular to the predetermined direction (e.g., the lateral direction) is within the above range, and it is more preferable that the arithmetic mean roughness Ra of the surface S of the surface layer 12 measured in each direction is within the above range.

[0012] The same applies to the maximum height roughness Rz of the surface S of the surface layer 12, which will be described later.

[0013] The surface layer 12 of the building material component 10 has a temperature of 55°C, and a heat plate set to 36°C is applied with a force of 10 gf / cm ２ The maximum heat flux QMAX1 when in contact with ２ less than or equal to 0.25 W / cm ２ It is preferable that QMAX1 is 0.3 W / cm or less. ２ If the temperature is below this, the heat is hardly felt even when the hand touches the surface layer 12. Here, the cooling / heating plate has a lower temperature than the surface S of the building component 10, and therefore functions as a cooling / heating source.

[0014] The heating and cooling plate is a pure copper plate with a 0.5 mm thick chloroprene rubber attached to the surface that comes into contact with the surface layer S. The temperature of the heating and cooling plate is set to 36°C, which is close to the temperature of human skin. The chloroprene rubber attached to the surface of the heating and cooling plate has a thermal conductivity close to that of human skin.

[0015] The surface layer 12 of the building material component 10 has a temperature of 70°C, and a heat plate set to 36°C is applied with a force of 10 gf / cm ２ The maximum heat flux QMAX2 when in contact with ２ It is preferable that the power is 0.25 W / cm or less. ２ It is more preferable that QMAX2 is 0.3 W / cm or less. ２ If the temperature is below this, the surface layer 12 is less likely to feel hot when touched with the hand.

[0016] The surface layer 12 of the building material component 10 is set to a temperature of 0°C, and a heating plate set to 36°C is applied with a pressure of 10 gf / cm ２ The maximum heat flux QMAX3 when in contact with ２ It is preferable that the power is 0.5 W / cm or less. ２ It is more preferable that QMAX3 is 0.7 W / cm or less. ２If the temperature is below this range, the hand will not feel cold even when touching the surface layer 12. Here, the heating plate functions as a heat source because its temperature is higher than that of the surface S of the building material component 10. The configuration of the heating plate is the same as that of the cooling plate described above.

[0017] The surface layer 12 preferably contains polyolefin wax particles. This allows the arithmetic mean roughness Ra of the surface S of the surface layer 12 to be 1.0 μm or more. The content of the polyolefin wax particles in the surface layer 12 is not particularly limited, but is, for example, 0.1 mass% or more and 3.0 mass% or less. The volume-based median diameter D50 of the polyolefin wax particles is not particularly limited, but is, for example, 6.0 μm or more and 9.0 μm or less. The volume-based median diameter D50 is the particle size at 50% of the integrated value of the volume-based particle size distribution measured by a laser diffraction / scattering method.

[0018] The polyolefin wax particles are not particularly limited, but examples thereof include polyethylene wax particles, polypropylene wax particles, and polytetrafluoroethylene (PTFE) modified polyethylene wax particles.

[0019] The maximum roughness height Rz of the surface S of the surface layer 12 is preferably 6.0 μm or more and 50.0 μm or less, and more preferably 20.0 μm or more and 50.0 μm or less. The maximum roughness height Rz of the surface S of the surface layer 12 may be 6.0 μm or more and 45.0 μm or less, or may be 20.0 μm or more and 45.0 μm or less. The thickness of the surface layer 12 is not particularly limited, but is, for example, 30 μm or more.

[0020] The surface layer 12 is formed, for example, by applying a powder coating containing a curable resin, a color pigment, a curing agent, and polyolefin wax particles to the substrate 11 and then curing the powder coating. The powder coating may further contain a surface conditioner, a plasticizer, a curing accelerator, an ultraviolet absorber, a light stabilizer, an antioxidant, a flowability adjuster, a sagging prevention agent, an antifoaming agent, etc.

[0021] The curable resin is not particularly limited, but examples thereof include hydroxyl group-containing polyesters, epoxy resins, and reactive group-containing fluorine resins, and two or more of these may be used in combination.

[0022] The hydroxyl group-containing polyester may be a known polyester used in curable resins for powder coatings, preferably having a softening point of 100°C or higher and 150°C or lower. Hydroxyl group-containing polyesters can be obtained, for example, by reacting a carboxylic acid component with a polyhydric alcohol component. Examples of the carboxylic acid component include polycarboxylic acids such as phthalic acid, isophthalic acid, terephthalic acid, naphthalenedicarboxylic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, 1,9-nonanedicarboxylic acid, 1,10-decanedicarboxylic acid, 1,12-dodecanedicarboxylic acid, 1,2-octadecanedicarboxylic acid, maleic acid, fumaric acid, cyclohexanedicarboxylic acid, hexahydrophthalic acid, tetrahydrophthalic acid, trimellitic acid, and pyromellitic acid; lower alkyl esters or anhydrides of polycarboxylic acids; and hydroxycarboxylic acids such as malic acid, tartaric acid, 1,2-hydroxystearic acid, and parahydroxybenzoic acid. Examples of polyhydric alcohol components include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, 1,10-decanediol, neopentyl glycol, spiroglycol, 1,10-decanediol, 1,4-cyclohexanedimethanol, trimethylolethane, trimethylolpropane, glycerin, and pentaerythritol.

[0023] The epoxy resin may be a known one used as a curable resin for powder coatings, preferably having a softening point of 50°C or higher and 150°C or lower. Examples of epoxy resins include bisphenol A diglycidyl ether resin, bisphenol F diglycidyl ether resin, aminoglycidyl ether resin, bisphenol AD ​​diglycidyl ether resin, bisphenol Z diglycidyl ether resin, o-cresol novolac epoxy resin, phenol novolac epoxy resin, biphenol glycidyl ether resin, cyclopentadiene skeleton epoxy resin, naphthalene skeleton epoxy resin, and GMA acrylic resin. Instead of epoxy resins other than those listed above, resins in which the substituents of the above epoxy resins have been converted to other substituents, such as modified resins modified by CTBN or esterification, may also be used.

[0024] The reactive group-containing fluororesin may be a known one used in curable resins for powder coatings, and has a reactive group that reacts with the curing agent. Examples of reactive groups include hydroxyl, carboxyl, amide, amino, nitrile, glycidyl, and isocyanate groups. Among these, hydroxyl groups are preferred from the viewpoint of stability and control of melt viscosity of the reactive group-containing fluororesin. The reactive group-containing fluororesin is obtained by copolymerizing a reactive group-containing monomer with a fluorine-containing monomer. Examples of fluorine-containing monomers include vinyl fluoride, vinylidene fluoride, trifluoroethylene, tetrafluoroethylene, bromotrifluoroethylene, chlorotrifluoroethylene, pentafluoropropylene, hexafluoropropylene, and (per)fluoroalkyl trifluorovinyl ether (wherein the (per)fluoroalkyl group has 1 to 18 carbon atoms). The reactive group-containing fluororesin may also be obtained by copolymerization with other monomers. Examples of the other monomers include vinyl ethers, olefins, allyl ethers, vinyl esters, allyl esters, (meth)acrylic esters, and crotonates.

[0025] The color pigment may be any known color pigment used in powder coatings, including, for example, inorganic pigments such as titanium oxide, yellow iron oxide, titanium yellow, and red iron oxide, and organic pigments such as cyanine blue, cyanine green, permanent yellow FGL, permanent red F5RK, carbazole, quinacridone red, and carbon black, and two or more of these may be used in combination.

[0026] The curing agent may be any known curing agent used in powder coatings. The curing agent is not particularly limited as long as it can react with the curable resin to form crosslinks, and examples thereof include blocked isocyanate curing agents, amine curing agents, and epoxy curing agents, and two or more of these may be used in combination.

[0027] Powder coatings are manufactured by known methods. The manufacturing method of powder coatings includes, for example, a premixing step, a melt-kneading step, a pulverizing step, and a classification step. The premixing step is a step of premixing the raw material composition of the powder coating using a mixer such as a Henschel mixer or a super mixer. The melt-kneading step is a step of melt-kneading the premix using various types of extruders. At this time, it is preferable to use a cooler such as a cooling roll or a cooling conveyor to cool and solidify the molten kneaded material into pellets. The pulverizing step is a step of pulverizing the molten kneaded material using a pulverizer such as a hammer mill or a jet mill. The classification step is a step of classifying the pulverized material using a classifier such as a vibration sieve, an ultrasonic sieve, or a cyclone classifier.

[0028] When applying the powder paint to the substrate 11, for example, the powder paint is applied to one side of the substrate 11, and then dried and heat-cured as necessary. Examples of methods for applying the powder paint include electrostatic coating, electrostatic spraying, atomization, fluidized bed dipping, spraying, spraying, thermal spraying, and plasma thermal spraying. The temperature at which the powder paint is heat-cured is, for example, 110°C or higher and 230°C or lower. Note that, before applying the powder paint, the substrate 11 may be covered with a wrapping sheet, or an electrodeposition coating film or the like may be formed on the substrate 11.

[0029] As described above, the surface layer 12 may be a non-foamed layer, but is preferably a foamed layer. ２ It can be as follows:

[0030] The surface layer 12 as a foam layer is formed by applying and then curing a powder coating containing, for example, a curable resin, a color pigment, a curing agent, polyolefin wax particles, a blowing agent, and a foaming aid. The foaming agent is not particularly limited, but examples include thermal decomposition type foaming agents such as azodicarbonamide, 4,4'-oxybis(benzenesulfonylhydrazide), hydrazodicarbonamide, barium azodicarboxylate, and sodium bicarbonate. The content of the foaming agent in the powder coating is preferably 0.5% by mass or more and 20% by mass or less, and more preferably 2% by mass or more and 10% by mass or less. The foaming aid is not particularly limited, but examples include zinc oxide, zinc hydroxide, and monosodium citrate.

[0031] The surface layer 12 preferably contains a heat-shielding pigment instead of or in addition to the coloring pigment. This allows the surface layer 12 to have a QMAX2 of 0.3 W / cm ２ The content of the heat-shielding pigment in the surface layer 12 is preferably 5% by mass or more and 50% by mass or less, and more preferably 10% by mass or more and 30% by mass or less.

[0032] The heat-shielding pigment is not particularly limited, but examples thereof include Fe—Cr pigments, Mn—Bi pigments, and (Ca, Ti, Mn)O. ３ Examples of suitable pigments include titanium dioxide, fibrous titanates, layered silicates, aluminum-based pigments, and silver-based pigments.

[0033] The material constituting the base material 11 is not particularly limited, but examples thereof include metals such as aluminum, steel, and stainless steel, resins such as polycarbonate, acrylic resin, and vinyl chloride, and fiber reinforced plastic (FRP). When the base material 11 is made of metal, the surface layer 12 functions effectively because the temperature tends to be high in the summer and low in the winter.

[0034] Next, a modified example of the building material component 10 will be described. As shown in FIG. 2, the building material component 20 is the same as the building material component 10, except that a base layer 21 is further formed between the base material 11 and the surface layer 12. The surface layer 12 may be a non-foamed layer or a foamed layer. The base layer 21 is a foamed layer. This allows the QMAX2 to be set to 0.3 W / cm. ２ The thickness of the underlayer 21 is preferably 5 μm or more and 200 μm or less, and more preferably 10 μm or more and 120 μm or less.

[0035] The undercoat layer 21 is formed, for example, by applying a solvent-based paint containing a curable resin, a foaming agent, and a foaming aid. Powder paint may be used instead of the solvent-based paint. Examples of the curable resin include, but are not limited to, the hydroxyl-containing polyester and epoxy resin described above. Examples of the foaming agent include, but are not limited to, thermal decomposition-type foaming agents such as azodicarbonamide, 4,4'-oxybis(benzenesulfonylhydrazide), hydrazodicarbonamide, barium azodicarboxylate, and sodium bicarbonate. The content of the foaming agent in the solids constituting the paint is preferably 0.5% by mass or more and 20% by mass or less, and more preferably 2% by mass or more and 10% by mass or less. Examples of the foaming aid include, but are not limited to, zinc oxide, zinc hydroxide, and monosodium citrate. Solvent-based paints are produced, for example, by diluting a known solvent-based paint for undercoat layers with a solvent and then adding a foaming agent and a foaming aid. The powder coating material is produced, for example, by adding a foaming agent and a foaming assistant to a known powder coating material.

[0036] Instead of using a foamed layer as the base layer 21, a layer containing hollow beads may be used. In this case, the base layer 21 is formed, for example, by applying a solvent-based paint containing a curable resin and hollow beads. Here, a powder paint may be used instead of the solvent-based paint. The curable resin is not particularly limited, but examples thereof include the above-mentioned hydroxyl group-containing polyester and epoxy resin. The material constituting the hollow beads is not particularly limited, but examples thereof include glass, resin, silica, and boron compounds. The median diameter D50 of the hollow beads is not particularly limited, but is, for example, 10 nm or more and 80 μm or less. The density of the hollow beads is not particularly limited, but is, for example, 0.01 g / cm ３ 0.5g / cm or more ３ The content of hollow beads in the underlayer 21 is preferably 0.1% by mass or more and 20% by mass or less, and more preferably 0.5% by mass or more and 10% by mass or less. The solvent-based paint is produced, for example, by diluting a known solvent-based paint with a solvent and then adding hollow beads. The powder paint is produced, for example, by adding hollow beads to a known powder paint.

[0037] Examples of the building components 10 and 20 include, but are not limited to, handrails, door handles, gates, fences, and shutter slats. Among these, handrails and door handles are preferred because the surface layer 12 functions effectively.

[0038] [Building Material] The building material of the present embodiment is not particularly limited as long as it includes the building component of the present embodiment. Examples of the building material include building materials that are installed outdoors, such as doors, shutters, delivery boxes, and mailboxes.

[0039] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and the above embodiments may be modified as appropriate within the scope of the spirit of the present disclosure.

[0040] Examples of the present disclosure will be described below, but the present disclosure is not limited to these examples. In these examples, evaluations were performed using test plates instead of building material parts.

[0041] [Examples 1 to 6, Comparative Examples 1 and 2] (Preparation of Powder Coatings) The raw materials (curable resin, pigment, curing agent, polyolefin (PO) wax particles, surface conditioner) were blended in the amounts [parts by mass] shown in Table 1 and then premixed. Next, the premix was melt-kneaded and cooled. Next, the melt-kneaded product was pulverized and classified to obtain powder coatings. In Examples 5 and 6, the obtained powder coatings were used as raw materials, and a blowing agent, a foaming assistant, and a heat-shielding pigment were further blended in the amounts [parts by mass] shown in Table 1, followed by stirring and mixing at room temperature to obtain powder coatings.

[0042]

[0043] Details of the raw materials in Table 1 are shown below. Curable resin: hydroxyl group-containing polyester U-Pica Coat GV570 (manufactured by Japan U-Pica) Pigment: carbon black MA100 (manufactured by Mitsubishi Chemical) Curing agent: ε-caprolactam blocked isocyanate VESTAGON (registered trademark) B1530 (manufactured by Evonik Degussa) PO wax particles: PTFE-modified polyethylene wax particles having a volume-based median diameter D50 of 6 μm Ceraflower 969 (manufactured by BYK) Surface conditioner: Resiflow P67 (manufactured by ESTRONCHEMICAL), IRGAFOS 168 (manufactured by BASF), and benzoin (manufactured by Fujifilm Wako Pure Chemical Industries) Foaming agent: azodicarbonamide (manufactured by Fujifilm Wako Pure Chemical Industries) Foaming assistant: zinc oxide (manufactured by Fujifilm Wako Pure Chemical Industries) Heat-shielding pigment: SG-101 (manufactured by Ishihara Sangyo Kaisha)

[0044] (Preparation of Test Plate) A 1.5 mm thick anodized aluminum plate was hung vertically and electrostatically coated with a powder coating material to a thickness of 80 μm using a corona-charged electrostatic powder coater at a voltage of −90 kV. Next, the powder coating material was thermally cured in an electric furnace at 180° C. for 30 minutes, and then allowed to cool to room temperature to form a surface layer, thereby obtaining a test plate.

[0045] [Examples 7 and 8] (Preparation of solvent-based paint for primer layer) The raw materials (solvent-based paint, diluent, foaming agent, foaming aid, and hollow beads) were blended in the amounts [parts by mass] shown in Table 2, and then mixed to obtain a solvent-based paint for primer layer.

[0046]

[0047] Details of the raw materials in Table 2 are as follows: Solvent paint: Metal Grip (Kansai Paint) Diluent: Super Epo Thinner (Kansai Paint) Foaming agent: Azodicarbonamide (Fujifilm Wako Pure Chemical Industries) Foaming assistant: Zinc oxide (Fujifilm Wako Pure Chemical Industries) Hollow beads: Glass Bubbles K1 (3M)

[0048] (Preparation of test panel) A solvent-based paint for a base layer was spray-coated on an anodized aluminum panel having a thickness of 1.5 mm so that the thickness after solvent evaporation was 40 μm, and then the panel was left at room temperature for 1 hour to form a base layer. Next, a surface layer was formed on the base layer in the same manner as in Example 4 to obtain a test panel.

[0049] [Example 9] (Preparation of powder coating for primer layer) The raw materials (powder coating, foaming agent, and foaming aid) were blended in the amounts [parts by mass] shown in Table 3 and then mixed to obtain a powder coating for primer layer.

[0050]

[0051] Details of the raw materials in Table 3 are as follows: Powder coating: Series 89 (manufactured by Tiger) Foaming agent: Sodium bicarbonate (manufactured by Fujifilm Wako Pure Chemical Industries) Foaming aid: Sodium citrate, monobasic acid (manufactured by Sigma-Aldrich)

[0052] [Examples 10 to 13] (Preparation of powder coating for primer layer) The raw materials (powder coating, foaming agent, and foaming aid) were blended in the blending amounts [parts by mass] shown in Table 4, and then mixed to obtain powder coating for primer layer.

[0053]

[0054] Details of the raw materials in Table 4 are as follows: Powder coating: 69 / 70000 Dry Protector (manufactured by Tiger) Hollow beads 1: Median diameter D50 is 65 μm and density is 0.125 g / cm ３ Glass Bubbles K1 (manufactured by 3M) Hollow Beads 2: Median diameter D50 is 60 μm and density is 0.15 g / cm ３Glass Bubbles K15 (manufactured by 3M) Hollow beads 3: Median diameter D50 is 35 μm and density is 0.22 g / cm ３ Glass Bubbles S22 (manufactured by 3M)

[0055] (Preparation of Test Plate) A 1.5 mm thick anodized aluminum plate was hung vertically, and a corona-charged electrostatic powder coating machine was used to electrostatically coat the powder coating material for the base layer at a voltage of -90 kV to a thickness of 80 μm. Next, an electric furnace was used to thermally cure the coating at 200°C for 10 minutes, and the coating was then allowed to cool to room temperature to form a base layer. Next, a surface layer was formed on the base layer in the same manner as in Example 4, to obtain a test plate.

[0056] [Arithmetic mean roughness Ra and maximum height roughness Rz of the surface of the surface layer] The arithmetic mean roughness Ra and maximum height roughness Rz of the surface of the surface layer (10 cm × 15 cm) were measured using a surface roughness measuring instrument, Surfcorder SE500 (manufactured by Kosaka Laboratory). At this time, the arithmetic mean roughness Ra and maximum height roughness Rz were measured in the longitudinal direction (direction 1) and the transverse direction (direction 2) perpendicular to the longitudinal direction.

[0057] [Maximum Heat Flux QMAX of Test Plate] Using Thermolab KES-F7 (manufactured by Kato Tech), the maximum heat fluxes QMAX1 to 3 of the test plate were measured as follows.

[0058] (QMAX1) A 200W, 110V incandescent lamp was used to irradiate a black plate with light, and the distance between the lamp and the test plate was adjusted so that the surface temperature of the outer layer remained stable at 55°C ± 0.5°C for at least 1 hour. After irradiating the test plate with light under these conditions for 1 hour, a cooling plate set at 36°C was heated with a 10 gf / cm ２ The hot and cold plate was made of a pure copper plate with chloroprene rubber of 0.5 mm thickness attached to the surface of the side that came into contact with the surface layer, and QMAX1 was measured.

[0059] (QMAX2) A 200W, 110V incandescent lamp was used to irradiate a black plate with light, and QMAX2 was measured in the same manner as QMAX1, except that the distance between the incandescent lamp and the test plate was adjusted so that the surface temperature of the outer layer remained stable at 70°C ± 0.5°C for at least 1 hour.

[0060] (QMAX3) The test plate was cooled for 1 hour using a 0°C thermostatic chamber so that the temperature of the test plate was 0°C, and then a heating plate set to 36°C was applied with a pressure of 10 gf / cm ２ The heating plate used was a pure copper plate with chloroprene rubber of 0.5 mm thickness attached to the surface that came into contact with the surface layer.

[0061] [Design of Appearance] The surface of the test plate was visually observed, and the design was evaluated according to the following criteria: 2: The surface has a good matte texture and the matte texture of the surface is uniform 1: The surface does not have a good matte texture and / or the matte texture of the surface is uneven

[0062] Table 5 shows the evaluation results of the test panels.

[0063]

[0064] From Table 5, the test plates of Examples 1 to 13 have an Ra of 1.17 μm or more and a QMAX1 of 0.293 W / cm ２ Furthermore, the test plates of Examples 5 to 13 have a QMAX2 of 0.298 W / cm ２ In contrast, the test plate of Comparative Example 1 has an Ra of 0.28 μm or less and a QMAX1 of 0.430 W / cm ２ This makes it easier to feel the heat.

[0065] The test plates of Examples 1 to 13 had a QMAX3 of 0.559 W / cm ２ In contrast, the test plate of Comparative Example 1 has a QMAX3 of 0.894 W / cm ２ This makes you more susceptible to feeling cold.

[0066] The test plates of Examples 1 to 13 have an Ra of 1.17 μm or more and 9.78 μm or less, so the surface has a matte texture with a good texture and the matte texture is uniform. In contrast, the test plate of Comparative Example 1 has an Ra of 0.28 μm or less, so the surface does not have a matte texture with a good texture. Furthermore, the test plate of Comparative Example 2 has an Ra of 12.86 μm or more, so the matte texture of the surface varies.

[0067] 10, 20 building material parts, 11 base material, 12 surface layer, 21 base layer, S surface

Claims

1. A building component having a surface layer formed on a base material, wherein the surface layer has an arithmetic mean roughness Ra of 1.0 μm or more and 10.5 μm or less, and the surface temperature of the building component is set to 55°C, and a heating and cooling plate set to 36°C is applied to the surface layer at a pressure of 10 gf / cm. ２ The maximum heat flux QMAX1 when in contact with ２ The component for a building material is as follows: the heating and cooling plate is a pure copper plate having a 0.5 mm thick chloroprene rubber attached to a surface of the side that comes into contact with the surface layer.

2. The surface temperature of the building material component is set to 70°C, and the heat plate set to 36°C is applied at 10 gf / cm ２ The maximum heat flux QMAX2 when in contact with ２ 2. The part for a building material according to claim 1, wherein:

3. A heating plate set to 36°C is applied at 10 gf / cm to the surface of the building material part whose temperature is set to 0°C. ２ The maximum heat flux QMAX3 when in contact with ２ The building material part according to claim 1 or 2, wherein the heating plate is a pure copper plate having a 0.5 mm thick chloroprene rubber attached to a surface thereof that comes into contact with the outer layer.

4. A building component according to any one of claims 1 to 3, wherein the surface layer contains polyolefin wax particles.

5. A building component according to any one of claims 1 to 4, wherein the surface layer is a foam layer.

6. A building component according to any one of claims 1 to 5, wherein the surface layer contains a heat-shielding pigment.

7. The part for a building material according to any one of claims 1 to 6, further comprising an underlayer formed between the base material and the surface layer, the underlayer being a foam layer.

8. A building component according to any one of claims 1 to 6, further comprising an underlayer formed between the substrate and the surface layer, the underlayer including hollow beads.

9. The building component according to any one of claims 1 to 8, which is a handrail or a door handle.

10. A building material comprising a building material component according to any one of claims 1 to 9.

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