Loose-fill, thermal insulation
AssigneeGrefco, Inc.
InventorsDavid L. Ruff, N. Gokul Nath
Life of this patent
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Abstract
Fire resistant, loose-fill, thermal insulation made of a mixture of particulate expanded perlite and cellulose fiber. The mixture is rendered non-settling and resistant to separation by applying a permanently tacky material to the particulate expanded perlite.
Claims13
A fire-resistant, loose-fill, thermal insulation comprising from about 10% to about 99% by volume celluose fiber, from about 1% to 90% by volume expanded perlite particles, and a tacky resin having a solid content from about 0.25% to about 10% by weight of the perlite, said particles being rendered tacky by said resin, said insulation having a bulk density less than about 2 pcf and a K-factor less than about 0.30.
A fire-resistant, loose-fill, thermal insulation comprising about 55 to 90% by weight expanded perlite particles;
- about 10 to 45% by weight cellulose fiber;
- and a tacky resin having a solid content of about 0.5 to 10% by weight of the combined weight of the perlite and the fiber, said particles being rendered tacky by said resin and said insulation having a bulk density of about 4.5 pcf, a K-factor of about 0.275 or less, a smoke density of about 5 and a flame spread less than about 10.
Dependencies are inferred from the claim text.