Method of binding lignocellulosic materials

Details Method of binding lignocellulosic materials Method of binding lignocellulosic materials

1979-10-05

1981-05-05

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

B29J 500

Patent

active

042658462

ABSTRACT:
A low cost method of binding lignocellulosic materials utilizing ammonium based spent sulfite liquor alone as the binder. Hot pressing a mat comprising lignocellulosic material and ammonium spent sulfite liquor at a temperature above 170.degree. C. decomposes the spent sulfite liquor. The decomposition products subsequently condense and polymerize in the presence of lignocellulosic materials to produce a composite product. An exterior grade board can be produced under certain operating conditions. Utilizing the lower molecular weight fraction of the liquor provides a more efficient binder.

REFERENCES:
patent: 2786008 (1957-03-01), Herschler
patent: 3141873 (1964-07-01), Goss
patent: 3969459 (1976-07-01), Fremont et al.

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