Composite fiberboard and process of manufacture

Details Composite fiberboard and process of manufacture Composite fiberboard and process of manufacture

1992-04-24

1994-01-11

Chin, Peter

Paper making and fiber liberation

Processes and products

Plural fiber containing

162169, 1621818, 162208, 162212, 162216, D21H 1340

Patent

active

052777626

ABSTRACT:
A novel composite board of mineral wool, perlite, and cellulosic newsprint fibers for use as an acoustical tile is disclosed. The board displays a high porosity, a fine pore structure, a low density gradient through its thickness and an acceptable strength. The board is manufactured by a process that includes a flotation step prior to the final formation step.

REFERENCES:
patent: 3006805 (1961-10-01), Waggoner
patent: 3573158 (1971-03-01), Pall et al.
patent: 4925529 (1990-05-01), Dotzauer et al.
patent: 4963603 (1990-10-01), Felegi et al.

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