Methods of preparing fire doors

Details Methods of preparing fire doors Methods of preparing fire doors

1994-12-05

1998-08-25

Maki, Steven D.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Plaster board making

156292, 156297, 1563041, 264333, B29C 6548

Patent

active

057980101

ABSTRACT:
Fiberboards are provided containing at least about 65 wt. % calcium sulfate dihydrate derived from hemihydrate or anhydrous gypsum, and at least about 7 wt. % pulped paper fibers. The boards are capable of being formed into structural members having superior mechanical properties and/or fire resistance, including screw-holding capacities in excess of 650 lbs.

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