Aromatic polymer molded article with modified surface condition and process for producing the same
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United States of America Patent
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Dec 29, 1992
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N/A
app pub date -
Jan 7, 1991
filing date -
Dec 11, 1987
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Expired
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Abstract
The present invention lies in a process for modifying the surface of a molded article, which process comprises irradiating the surface of a molded article composed of an aromatic polymer or a polymer composition containing said aromatic polymer, with an ultraviolet laser beam having a wavelength of about 150 nm-380 nm at a fluence at least lower than the threshold to modify the surface as compared with the condition before the irradiation. The process makes it possible to modify the condition of the laser beam-irradiated surface portions of the molded article to, for example, a white color or black color, whereby the molded article can be endowed with functions and properties required in its use in various applications.
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