Method for forming fiber web for compression molding structural

Details Method for forming fiber web for compression molding structural Method for forming fiber web for compression molding structural

1987-12-15

1989-09-12

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

264113, 264118, 264119, 264120, 264121, 264122, 264518, 156 622, 156 628, 156148, 156300, B29C 4326, B29C 4330

Patent

active

048657883

ABSTRACT:
A method for forming a fiber web and fibrous web useful for compression molding stiff, board-like structural substrates for panels is formed of a thoroughly intermixed blend of wood fibers and synthetic plastic fibers with a dry, powdery, resinous molding material uniformly disbursed throughout the blend. The mass of intermixed fibers and resinous molding material is covered with a thin, randomly oriented, fibrous scrim material and the fibers are locked to each other and to the scrim mechanically by means of needling them together. The web is formed by drying wood fibers, spreading them into a mat, covering the mat with the synthetic fibers and thereafter, dispersing the fibers through a dispersion chamber and recollecting and re-spreading them into a web by means of a picker roller, gravity dropping a powdery resinous molding material upon the web, redistributing and intermixing the fibers and the molding material with a second picker roller, applying the scrim and needling the combined scrim and fiber web for mechanically interlocking them.

REFERENCES:
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patent: 4146564 (1979-03-01), Garrick
patent: 4229397 (1980-10-01), Fukuta
patent: 4299877 (1981-11-01), Smart
patent: 4418031 (1983-11-01), Doerer
patent: 4463048 (1984-07-01), Dickson

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