Method of and apparatus for manufacturing fiber-reinforced therm

Details Method of and apparatus for manufacturing fiber-reinforced therm Method of and apparatus for manufacturing fiber-reinforced therm

1978-03-23

1979-10-30

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 467, 264134, 264257, 425115, 425371, 425817C, 427434B, 428114, 428294, 428317, B29D 2700

Patent

active

041728696

ABSTRACT:
The manufacture is carried out by impregnating bundles of filaments of fibrous-reinforcing material in a bath made up of an emulsion of a thermoplastic resin and a blowing agent. The emulsion-impregnated reinforcing filament bundles are then squeezed and dried to form resin coatings, and then collected to provide a single bunch of the fiber-reinforced thermoplastic resin material. This bunch is subsequently heated and allowed to expand in a tunnel and also cooled in a tunnel to produce a fiber-reinforced thermoplastic resin of a cellular structure. During the impregnation with the emulsion in a bath, the bundles are slackened and repeatedly beaten in the condition of free tension to cause the filament bundles to be substantially frayed to facilitate the impregnation. An apparatus utilizable in the practice of the above method is also disclosed.

REFERENCES:
patent: 2865790 (1958-12-01), Baer
patent: 2972554 (1961-02-01), Muskat et al.
patent: 3238281 (1966-03-01), Kato
patent: 3448489 (1969-06-01), Boggs
patent: 3551280 (1970-12-01), Kippan
patent: 3917774 (1975-11-01), Sagane
patent: 3951718 (1976-04-01), Gonzalez
patent: 3980511 (1976-09-01), Proucelle
patent: 4025256 (1977-05-01), Heller

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