LASER RAY TRANSMITTING COLORED RESIN COMPOSITION AND RELATED ART
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United States of America Patent
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Issued Date -
Mar 1, 2007
app pub date -
Aug 29, 2006
filing date -
Sep 1, 2005
priority date (Note) -
Abandoned
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Abstract
A laser ray transmitting colored resin composition is formed of polyphenylene sulfide resin and a colorant having an endothermic peak between 200.degree. C. and 300.degree. C. as determined by TG/DTA thermal analysis. The difference T.sub.C-T.sub.N between the crystallization point T.sub.C of the laser ray transmitting colored resin composition and the crystallization point T.sub.N of the same composition as the composition except for not containing the aforementioned colorant, is not less than 0.degree. C. as determined by DSC thermal analysis. The laser ray transmitting material is made of the laser ray transmitting colored resin composition, and has one exothermic energy peak and one endothermic energy peak as determined by DSC thermal analysis. The laser ray transmitting colored resin composition is excellent in molding accuracy, good in molded product appearance and gloss, capable of preventing or effectively reducing the gap between the materials to be welded in the case of a molded product used for laser welding, and good in heat resistance and fastness. The laser ray transmitting material is excellent in dimension stability and shape stability and capable of preventing or effectively reducing the gap between the materials to be welded when used for laser welding.
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