Perlite insulation board and method of making the same

Details Perlite insulation board and method of making the same Perlite insulation board and method of making the same

1975-01-27

1976-10-26

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Pore forming in situ

162171, 162175, 162181A, 162181C, D21D 300

Patent

active

039881997

ABSTRACT:
A perlite insulation board is disclosed herein and includes, as conventional ingredients, expanded perlite, organic fiber and binder, the perlite, being the largest single ingredient, by dry weight, in the board. The insulation board also includes gypsum in an amount less than the perlite but preferably in an amount sufficient to form a gypsum matrix throughout the board. A method of making a perlite insulation board of the general type just described is also disclosed herein.

REFERENCES:
patent: 3244632 (1966-04-01), Schulz
patent: 3552985 (1971-01-01), Hawkins
patent: 3764357 (1973-10-01), Bowles et al.
patent: 3770859 (1973-11-01), Bevan

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