Decorative parts and a method for manufacturing the same

Abstract

The automobile decorative-part ( 1 ) comprises a resin-compact ( 3 ) having a decorative-layer ( 2 ) on its surface-layer and comprises a clear-coat layer ( 4 ) for protecting said surface-layer, and that a high-gloss region (R 1 ) of a relatively high-gloss level is mixed with a low-gloss region (R 2 ) of a relatively low-gloss level on the surface of said decorative-part, and that a clear-coat paint is sprayed by an atomization-coating machine onto the surface of the decorative-layer ( 2 ), and that the atomization-coating machine contains an ester-based solvent of a low-boiling point as the main-solvent that has a boiling-point of 100 degrees Celsius or less and has a solid-content of 35 to 40 percent by mass, thus forming the clear-coat layer ( 4 ) that makes it partially possible to mat the gloss of the surface of the clear-coat layer, thus manufacturing a decorative-part with an excellent quality design.

1 . A method for manufacturing a decorative-part comprising a part having a decorative-layer on the surface-layer and having a clear-coat layer for protecting the surface of the decorative-layer, wherein said surface of the clear-coat layer of a relatively high-gloss-level region is mixed with a relatively low-gloss-level region on the surface of the part, characterized in comprising a decorative-layer-forming process of which the decorative-layer is formed on the surface-layer of the part, and then a concave-convex part is formed on the surface of the decorative-layer that should later be placed beneath the low-gloss region; and characterized in comprising a clear-coat-layer-forming process of which a clear-coat layer having a surface-shaped low-gloss region is formed over the concave-convex part by using a clear-coat paint containing a low-boiling-point solvent (less than 100 degrees) as the main-solvent and containing a solid-content of 10 to 55 percent by mass; and thereby such clear-coat-layer-forming process the clear-coat paint is sprayed onto the surface of the decorative-layer by an atomization-coating machine. 
     
     
         2 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that the clear-coat paint contains a solid content of 35 to 40 percent by mass. 
     
     
         3 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that during the clear-coat-layer-forming process, the clear-coat paint is sprayed on the condition that the atomizing-pressure of the atomization-coating machine is 0.06 MPa to 0.09 MPa. 
     
     
         4 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that during the clear-coat-forming process, the clear-coat paint is sprayed on the condition that the amount of discharge from the of the atomization-coating machine is 50 cc/min or more. 
     
     
         5 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that during the clear-coat-forming process, the clear-coat paint is sprayed on the condition that the amount of discharge from the atomization-coating machine is 50 cc/min to 65 cc/min. 
     
     
         6 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that during the decorative-layer-forming process, the decorative-layer part is formed by hydraulically transferring the transcription-film having the concave-convex part onto the design-layer. 
     
     
         7 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that during the decorative-layer-forming process, a transcription-film, which is laminated by the design-layer onto which the design is drawn, and laminated by the gloss-layer onto which the gloss is given, and laminated by the mat-layer that has the concave-convex part, is hydraulically transferred, thus forming the design-layer and the gloss-layer and the mat-layer that makes the decorative-layer. 
     
     
         8 . A method for manufacturing the decorative-part according to  claim 7 , characterized in that the roughness Ra of the surface of the mat-layer is 2 μm or less. 
     
     
         9 . A method for manufacturing the decorative-part according to  claim 7 , characterized in that the mat-layer should contain the same pigment that is contained in the design-layer formed on the side of the lower-layer. 
     
     
         10 . A method for manufacturing the decorative-part according to  claim 7 , characterized in that the design is a wood-effect one, and that the mat-layer is formed on the section corresponding to the knot of the wood-grain. 
     
     
         11 . A method for manufacturing the decorative-part according to  claim 7 , characterized in that the gloss-layer is a transparent resin-layer made of an acryl-polyol resin and formed of a uniform thickness on the whole surface of the design-layer on which the design is provided. 
     
     
         12 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that the gloss-value indicating the gloss-level of the high-gloss region becomes 30 or more, and that the gloss-value of the low-gloss region is 10 or less. 
     
     
         13 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that during the decorative-layer-forming process, the concave-convex part is formed on the surface-layer of the decorative-part by an emboss-processing procedure. 
     
     
         14 . A method for manufacturing the decorative-part according to  claim 1 , characterized in that during the decorative-layer-forming process, the concave-convex part is formed on the surface-layer of the decorative-part by a laser-processing procedure. 
     
     
         15 . A decorative-part comprising a part having a decorative-layer on the surface-layer and having a clear-coat layer for protecting the surface of the decorative-layer, wherein said surface of the clear-coat layer of a relatively high-gloss-level region is mixed with a relatively low-gloss-level region on the surface of the part, characterized in that the concave-convex part is formed beneath the low-gloss region on the surface of the decorative-layer, with the low-gloss region of the clear-coat layer being of the surface formed upon the concave-convex part; with the roughness Ra of the surface of the clear-coat layer being 1 μm or less; and with the difference in the gloss-level between the high-gloss region and the low-gloss region being twice as much or more. 
     
     
         16 . A decorative-part according to  claim 15 , characterized in that the decorative-layer is made of the design-layer onto which the design is drawn; characterized in that the gloss-layer is one onto which the gloss is given; and characterized in that the mat-layer is one having the concave-convex part. 
     
     
         17 . A decorative-part according to  claim 16 , characterized in that the roughness Ra of the surface of the mat-layer is 2 μm or less. 
     
     
         18 . A decorative-part according to  claim 16 , characterized in that the mat-layer should contain the same pigment that is contained in the design-layer formed on the side of the lower-layer. 
     
     
         19 . A decorative-part according to  claim 16 , characterized in that the design is a wood-effect one, and that the mat-layer is formed on the section corresponding to the knot of the wood-grain. 
     
     
         20 . A decorative part according to  claim 16 , characterized in that the gloss-layer is a transparent resin-layer made of an acryl-polyol resin formed of a uniform thickness on the whole surface of the design-layer on which the design is provided. 
     
     
         21 . A decorative-part according to  claim 16 , characterized in that the gloss-value indicating the gloss-level of the high-gloss region is 30 or more, and that the gloss-value of the low-gloss region is 10 or less.