AUTOMOBILE BODY AND MANUFACTURING METHOD OF THE SAME

• Main Authors: TERAMOTO KOJI, YAMANE TAKAKAZU, MARUOU KENJI, OKAMOTO KEIICHI, NONAKA TAKAHARU, KIYONAGA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 24.11.2023
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MOTOR VEHICLES; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRAILERS; TRANSPORTING

To provide an automobile body characterized in that both whiteness and a metallic texture are attained, and a manufacturing method of the automobile body.SOLUTION: An automobile body includes a coated matter and bilayer coating film. The bilayer coating film includes a color coating film that is formed over the coated matter and contains a white pigment, a brilliant coating film that is formed over the color coating film and contains a brilliant material, and a clear coating film formed over the brilliant coating film. A luminosity L*45 based on a spectral reflectance that light I45 irradiated at an angle of 45 degrees with respect to the surface of the bilayer coating film is received at an angle of 45 degrees with respect to regularly reflected light is equal to or larger than 70 and equal to or smaller than 90. A ratio of a luminosity L*5 based on a spectral reflectance that the light I45 is received as an angle of 5 degrees with respect to the regularly reflected light to a luminosity L*15 based on a spectral reflectance that the light I45 is received at an angle of 15 degrees with respect to the regularly reflected light, L*5/L*15, is equal to or larger than 1.2 and equal to or smaller than 2.5. An occupancy of the brilliant material relative to the surface of the bilayer coating film is equal to or larger than 10% and equal to or smaller than 30%. A granularity on the surface of the bilayer coating film is equal to or larger than 1.0 and equal to or smaller than 3.0.SELECTED DRAWING: Figure 2 【課題】白さと金属調の質感とが両立された自動車車体およびその製造方法を提供する。【解決手段】被塗物および複層塗膜を備え、複層塗膜は、被塗物上に形成され、白色顔料を含む着色塗膜と、着色塗膜上に形成され、光輝材を含む光輝性塗膜と、光輝性塗膜上に形成されたクリヤー塗膜と、を備え、複層塗膜の表面に対して４５度の角度から照射した光Ｉ４５を、正反射光に対して４５度の角度で受光した分光反射率に基づく明度Ｌ＊４５は、７０以上９０以下であり、光Ｉ４５を、正反射光に対して５度の角度で受光した分光反射率に基づく明度Ｌ＊５と、光Ｉ４５を、正反射光に対して１５度の角度で受光した分光反射率に基づく明度Ｌ＊１５との比：Ｌ＊５／Ｌ＊１５は、１．２以上２．５以下であり、複層塗膜の表面からみた光輝材の占有率は、１０％以上３０％以下であり、複層塗膜の表面における粒子感は、１．０以上３．０以下である、自動車車体。【選択図】図２