Method for producing black plated resin part

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United States of America Patent

PATENT NO 11761106
APP PUB NO 20210347150A1
SERIAL NO

17384552

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Abstract

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A method for producing a black plated resin part includes the steps of electroplating a resin substrate provided with an underlying plating layer in a trivalent chromium plating bath containing thiocyanic acid, to thereby form, on the underlying plating layer, a black chromium plating layer composed of trivalent chromium and having a thickness of 0.15 μm or more; and immersing the resin substrate provided with the black chromium plating layer in warm water at 30° C. or higher for a predetermined time. In the method, the amount of thiocyanic acid contained in the trivalent chromium plating bath, the temperature of the warm water, and the time of immersion of the resin substrate in the warm water are adjusted so that the black chromium plating layer exhibits a b* value of −1.7 or less based on the L*a*b* color system.

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Patent Owner(s)

Patent OwnerAddress
TOYODA GOSEI CO LTDKIYOSU-SHI AICHI 452-8564

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujii, Shiho Kiyosu, JP 2 0
Hotta, Yuji Kiyosu, JP 83 735
Isomura, Noritake Nagakute, JP 2 0
Nakatani, Koji Kiyosu, JP 37 188
Ono, Hiroaki Kiyosu, JP 207 1452

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