Toyo Seikan Group Holdings, Ltd.

Kouta Segami

Kazunobu Watanabe

Yusuke Kobayashi

Yuusuke Kobayashi

Toshinori Enokido

The present invention provides a molding precursor for a fiber-reinforced polyimide resin molded article, which is formed by impregnating a functional fiber with an addition-reaction type polyimide resin. The molding precursor has a melt viscosity in the range of 300 to 3200 kPa·s under conditions of keeping for 1 to 10 minutes at a temperature 5 to 20° C. lower than the thickening-start temperature so as to effectively prevent a fiber-reinforced polyimide resin molded article from warping. The present invention provides also a method for producing the molding precursor.

Fiber-reinforced polyimide resin molding precursor and method for producing the same

A fiber-reinforced polyimide resin molded article and a production process therefor. After a prepolymer of an addition reaction type polyimide resin and functional fibers are dispersed and kneaded together, the kneaded product is kept at a temperature not lower than the heat curing start temperature of the reaction type polyimide resin for a fixed amount of time or mixed with a thickener to increase its viscosity, and shaped at a temperature not lower than the heat curing start temperature of the reaction type polyimide resin to obtain a molded article having excellent sliding performance with a limit PV value of not less than 3,000 kPa&#xb7;m/s and excellent shape stability during molding and containing the functional fibers dispersed in the polyimide resin.

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Yokohama, Japan

Kouta Segami