Sheets or moulded bodies and methods for their manufacture

Details Sheets or moulded bodies and methods for their manufacture Sheets or moulded bodies and methods for their manufacture

B - Operations, Transporting

29

C

18/1010, 400/111

B29C 33/60 (2006.01) B27N 3/08 (2006.01) C08L 97/02 (2006.01)

Patent

CA 1169178

ABSTRACT Sheets or moulded bodies, for example particle board, are manufactured by hot pressing a lignocellulosic material in contact with an organic polyisocyanate and a wax release agent which is a vegetable wax, a modified vegetable oil, a microcrystalline wax or a mineral wax, said wax release agent having a melting point of a least 70°C. Preferably the wax release agent is applied to the lignocellulosic material in the form of a dispersion in an aqueous emulsion of the polyisocyanate. The process facilitates the release of the sheets or moulded bodies from the caul plates or platens of the press.

383623

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