Method of making board made of lignite ash-slag, wood particles

Details Method of making board made of lignite ash-slag, wood particles Method of making board made of lignite ash-slag, wood particles

1992-04-29

1993-10-12

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Plural, intermittent pressure applying

264122, B29C 4314

Patent

active

052522768

ABSTRACT:
A Logicore construction board, a method and a composition thereof involve use of lignite ash-slag, wood waste particles and a synthetic adhesive. Lignite ash-slag is a waste mineral product which is widely available, but presently has no use. The present invention solves an important ecological problem by converting the waste product into a useful product. Lignite ash-slag and a synthetic adhesive of urea-formaldehyde resin of P-type and a hardener of a predetermined resin to hardener ratio are first mixed. Separately, wood particles and the synthetic adhesive of a predetermined resin to hardener ratio are mixed. The two mixtures of the lignite ash-slag and the wood particles are then mixed together. The combined mixtures are then poured to form a blanket and then pressed at a room temperature followed by a heat press to form a board. The board is water-proof, fire-proof and corrosion-resistant.

REFERENCES:
patent: 3504073 (1970-03-01), Rakszawski
patent: 3784494 (1974-01-01), Domokos
patent: 3903041 (1975-09-01), Bornstein
patent: 4073848 (1978-02-01), Kuehn
patent: 4933125 (1990-06-01), Reiniger

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