Non-combustible hardboard sheet

Details Non-combustible hardboard sheet Non-combustible hardboard sheet

1975-12-15

1977-05-17

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Plural fiber containing

162181C, 162206, 162222, 162225, 264119, 427370, 427427, D21H 518

Patent

active

040240142

ABSTRACT:
A process for preparing a non-combustible hardboard sheet is disclosed. The process comprises the formation of relatively low density insulation board type product which is dried, whereafter the board is wetted on both sides and compressed at relatively high temperatures to form a dense non-combustible hardboard product.

REFERENCES:
patent: 2030625 (1936-02-01), Ellis
patent: 2717830 (1955-09-01), Bjorkman
patent: 2773763 (1956-12-01), Scott
patent: 2944930 (1960-07-01), Bush et al.
patent: 3093533 (1963-06-01), Hella et al.
patent: 3113065 (1963-12-01), Newton et al.
patent: 3510394 (1970-05-01), Cadotte
patent: 3679790 (1972-07-01), Alfsen
patent: 3681115 (1972-08-01), Maher

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