Resin impregnation process

Details Resin impregnation process Resin impregnation process

1980-05-05

1982-01-19

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264102, 264257, B29D 302

Patent

active

043116612

ABSTRACT:
Process for producing a resin-fiber composite which comprises applying a "B" stage resin film to a mold surface, placing a fiber reinforcement layer over the "B" stage film, applying a porous parting film over the fiber reinforcement layer, applying a bleeder layer over the fiber reinforcement layer and placing a non-porous material over the bleeder layer. A bag is placed over the materials and sealed to or around the mold. A vacuum is applied to the mold and then the assembly is heated to a temperature sufficient to cause the "B" stage resin to flow and to impregnate the reinforcement layer, and pass up through the porous parting film and to impregnate the bleeder layer. The volume of resin provided by the "B" stage resin film is calculated so that saturation of both the fiber reinforcement layer and the bleeder layer occur, assuring uniform impregnation of the fiber reinforcement layer. The mold pressure is then increased and the temperature is raised to produce final curing of the resin impregnated fiber reinforcement layer, and the resulting resin impregnated fiber reinforcement layer is removed from the mold. A curable resin liquid can be employed in place of the "B" stage resin film.

REFERENCES:
patent: 3523152 (1970-08-01), Curtis
patent: 3575756 (1971-04-01), Maus
patent: 3666600 (1972-05-01), Yoshino
patent: 3703422 (1972-11-01), Yoshino
patent: 3790432 (1974-02-01), Fletcher et al.
patent: 4201823 (1980-05-01), Russell

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