Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Stratified or layered articles
Patent
1986-07-07
1988-03-29
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Stratified or layered articles
264518, 264113, 264118, 264119, 264120, 264121, 264122, B29C 4326, B29C 4330
Patent
active
047342366
ABSTRACT:
A method of forming a fibrous web useful for compression molding stiff, board-like structural substrates for panels by thoroughly intermixing a 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.
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Durkin, II J. F.
Sheller-Globe Corporation
Silbaugh Jan H.
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