Treated gypsum wallboard paper

Details Treated gypsum wallboard paper Treated gypsum wallboard paper

1977-10-03

1978-12-05

Van Balen, William J.

Stock material or miscellaneous articles

Composite

Of natural gum, rosin, natural oil or lac

156 44, 162179, 427403, 427417, 428539, B32B 1308, B32B 2900

Patent

active

041286995

ABSTRACT:
Drying oils are used to improve strength and durability characteristics of gypsum wallboard paper with many unexpected additional advantages. Applied before board manufacture, critical porosity characteristics are left uninterrupted. Applied after board manufacture, shear strengths are obtained beyond expectations.

REFERENCES:
patent: 2721504 (1955-10-01), Mossberg et al.
patent: 3383271 (1968-05-01), Roberts et al.
patent: 3535155 (1970-10-01), Gathman
patent: 3694298 (1972-09-01), Veschuroff et al.

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