Abstract: The device comprises a floodlight unit and a receiver unit and a processing unit. The floodlight unit applies an infrared light to the surface of a work piece, and comprises a surface light source and a focusing lens. The receiver unit receives the infrared light reflected from the surface of the work piece, and comprises a receiver sensor and a filter, which passes the infrared light that has the wavelength which contaminants on the surface absorb. The processing unit evaluates the cleanliness of the surface of the work piece according to the absorbance of the infrared light reflected from the surface. And a receiving area of the reflected infrared light from the surface is set smaller than an applying area of the applied infrared light to the surface.

Abstract: There is disclosed a polyamide resin composition comprising (A) 100 parts by weight of a polyamide (a) composed mainly of a xylylenediamine component and an .alpha.,.omega.-straight chain asphaltic dibasic acid component, or a combination of the polyamide (a) and polyamide 66, (B) 1 to 15 parts by weight of polyamide 12, (C) 0.01 to 5 parts by weight (in terms of copper) of a copper compound, (D) 1 to 15 parts by weight of carbon black, and (E) an alkali metal halide of such an amount that the number of halogen atoms of the alkali metal halide is 0.3 to 4 per one copper atom of the above copper compound. Said polyamide resin composition has an excellent weather resistance, moldability, and mechanical properties, and can be injection-molded.

Abstract: A polyamide molding composition is disclosed comprising the admixture of glass fibers, nylon 6,6, and an MX nylon, obtained from the condensation of a xylylenediamine and an .alpha.,.omega.-straight chain aliphatic dibasic acid having 6-12 carbon atoms.

Abstract: A glass fiber-reinforced polyamide resin molding material, comprising a polyamide resin obtained by the condensation reaction of xylylene diamine with at least one member selected from straight-chain aliphatic .alpha.,.omega.-dicarboxylic acids having 6 to 12 carbon atoms and incorporated therein, glass fiber in an amount of 5 to 50% by weight based on the total weight of the polyamide resin and the glass fiber, and a shaped article obtained by molding aforesaid molding material.