Preparation of a three layer, fire retardant particleboard

Details Preparation of a three layer, fire retardant particleboard Preparation of a three layer, fire retardant particleboard

1974-05-28

1976-12-07

Bashore, S. Leon

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

156 622, 162142, 162159, 162225, 264122, 428535, 428921, B29J 500, D21J 108, D21J 116

Patent

active

039963250

ABSTRACT:
Fire retardant reconstituted cellulosic products are produced having fire retardancy substantially equal to conventional fire retardant products by impregnation of a portion of bark with a fire retardant and mixing said impregnated bark portion with another portion of bark which is untreated with a fire retardant. Additionally, a portion of wood chips is impregnated with a fire retardant and mixed with another portion of wood chips untreated with a fire retardant. Subsequently, the combined portions of bark and wood chips are formed into a three layer composite particleboard, having a bark core and wood chip surface, by pressing and heating.

REFERENCES:
patent: 1892472 (1932-12-01), Rafton
patent: 2030653 (1936-02-01), Quinn
patent: 2851730 (1958-09-01), Wilhelmi et al.
patent: 3245870 (1966-04-01), Orth et al.
patent: 3438847 (1969-04-01), Chase
patent: 3535199 (1970-10-01), Kuhr et al.
patent: 3674596 (1972-04-01), McMinimy

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