Precoat treatment for improving cellulosic insulation
OwnerLeonard D. Roodinventor
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Abstract
The coating of shredded paper insulation with a powdered or particulate fire retardant agent mixed with an anti-static agent to enhance coating is further improved by applying a precoat of a mixture of fire retardant agent and anti-static agent, the precoat mixture containing only a relatively minor portion of the final fire retardant coating, and subsequently coating the paper particles with the remaining fire retardant agent.
Claims16
An improved method for manufacturing fire retardant cellulose insulation comprising shredded cellulosic fibers having an inorganic fire retardant agent deposited on the fibers wherein the improvement comprises:
- (a) mixing an anti-static agent with a fire retardant agent to form a solid particulate precoat;
- (b) depositing the precoat on the shredded fibers;
- and
- (c) subsequently depositing additional fire retardant agent with no effective amount of anti-static agent on the previously precoated shredded cellulosic fibers.
A method for manufacturing cellulosic insulation comprising:
- (a) shredding a cellulosic material to form a mass of cellulosic fibers;
- (b) mixing and effecting the adhesion of an anti-static agent with an inorganic fire retardant agent to form a solid particulate precoat mixture;
- (c) mixing said shredded cellulose fibrous mass in a substantially unwetted form with said solid particulate precoat mixture;
- and
- (d) subsequently mixing additional fire retardant agent with no effective amount of anti-static agent in the mixture of cellulose fibrous mass, anti-static agent and fire retardant agent.
Dependencies are inferred from the claim text.