Method of manufacturing a molded article
AssigneeTeijin Chemicals, Ltd.
InventorsSeiichi Tanabe, Abe Yoshiaki
Life of this patent
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Abstract
A method of manufacturing a molded article having excellent color and transparency and made from a polycarbonate resin. The method is for manufacturing a molded article by melting and molding a granule of a polycarbonate resin at a temperature of 280 to 380° C., wherein the granule satisfies the following condition (a): (a) when 100 parts by weight of the granule is cleaned with 100 parts by weight of a 1N nitric acid aqueous solution, the amount of an Fe compound eluted into the cleaning liquid of the 1N nitric acid aqueous solution is 1 to 100 ppb in terms of an Fe atom based on the granule.
Claims8
A method of manufacturing a molded article by melting and molding a granule of a polycarbonate resin at a temperature of 280 to 380° C., wherein the granule satisfies the following condition (a):
- (a) when 100 parts by weight of the granule is cleaned with 100 parts by weight of a 1N nitric acid aqueous solution, the amount of an Fe compound eluted into the cleaning liquid of the 1N nitric acid aqueous solution is 1 to 100 ppb in terms of an Fe atom based on the granule.
A method of preventing the coloration of a molded article when a granule of a polycarbonate resin is molded, wherein the granule satisfies the following condition (a):
- (a) when 100 parts by weight of the granule is cleaned with 100 parts by weight of a 1N nitric acid aqueous solution, the amount of an Fe compound eluted into the cleaning liquid of the 1N nitric acid aqueous solution is 1 to 100 ppb in terms of an Fe atom based on the granule.
Dependencies are inferred from the claim text.