Press cycle reduction for wet pressed hardboard

Details Press cycle reduction for wet pressed hardboard Press cycle reduction for wet pressed hardboard

1982-04-30

1983-10-25

Chin, Peter

Paper making and fiber liberation

Processes and products

Plural fiber containing

162149, 162165, 162176, 162187, 162225, D21H 514

Patent

active

044117388

ABSTRACT:
The production of hardboard by the wet press process is speeded up by the incorporation of finely divided fibers in an aqueous slurry of otherwise fast draining wood fibers and a thermosetting binder so that a barrier of said fine fibers is formed during hot pressing of the mat and steam pressure is built up in the mat. The high pressure permits a curing temperature of from about 300.degree. F. to about 350.degree. F. in the core of the mat and a concomitant acceleration of the cure of the binder.

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patent: 2766162 (1956-10-01), Boehm et al.
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patent: 3533906 (1970-10-01), Reiniger
patent: 4038131 (1977-07-01), Baldwin et al.
patent: 4173248 (1979-11-01), Roberts

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