Composite board and method

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component

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Details

428326, 428443, 428445, 428507, B32B 2700

Patent

active

048186040

ABSTRACT:
A composite board is produced by the method of blending a cellulosic filler having sufficient extractable organic content and an expandable thermoplastic polymer, adding a tacifier agent during blending for producing a pre-blown mixture, heating the mixture in a mold to a temperature above the glass transition temperature of the polymer for a period of time sufficient to permit expansion of the beads and bonding of the expanded beads with the cellulosic filler to thereby form a composite board. The board may be laminated by a solvent based adhesive or a thermal insult coating so as to form rigid macro-voids between the laminate and the composite board surface.

REFERENCES:
patent: 2718479 (1955-09-01), Bierly
patent: 4209561 (1980-06-01), Sawko
Tock, Simms and Irvine, "Organic Filler and Resins Make Better Chemistry", Plastics Engineering, Dec. 1986, pp. 27-30.

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