The Furukawa Electric Co., Ltd.

Nobu Kitamura

Hisako Hori

Isao Shirahata

Nobuyuki Nakamura

Noriyoshi Ohkubo

A process for crosslinking a polycarbonate resin involves heating the polycarbonate resin in the presence of an organic copper compound at a temperature higher than the glass transition point of the polycarbonate resin.

Process for crosslinking polycarbonate resins

Copper powder or a copper compound is mixed with a substantially linear polyester series resin, and the resultant resin composition is formed into a predetermined shape. Thereafter, the resin composition is heated to a temperature above the melting point of the resin in an oxygen-containing atmosphere for cross-linking the polyester series resin.

Process for cross-linking polyester series resin

A method of manufacturing of a novel very fine seamless heat resistant synthetic resin tube having a wall thickness of not more than 0.3 mm, by applying a specific heat resistant synthetic resin varnish as defined in the specification on a metal wire and curing said resin varnish to form the synthetic resin layer on the metal wire, drawing the heat resistant synthetic resin coated wire above the yield point of the metal wire and separating the resulting synthetic resin tube from the metal wire. The method of the present invention may produce a composite heat resistant synthetic resin tube in which a plurality of the above-described tubes are made to adhere tightly parallel with each other in the longitudinal direction or a double layer resin tube, one layer of which is a thermally adhesive synthetic resin and the other layer of which is the heat resistant resin.

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Hiratsuka, Japan

Nobu Kitamura