Perlite-based insulation board
AssigneeJohns Manville International, Inc.
InventorsDavid Chee-Fai Law, Christopher Paul Sandoval, Ruben G. Garcia
Life of this patent
Estimating the term…
Abstract
A perlite-based insulation board includes, by dry weight, between about 50% and about 76% expanded perlite; between about 15% and about 45% fibers; between about 1% and about 5% starch; between about 2% and about 9% bituminous material; and about 0% to about 3% alum. The fibers are between about 50% and about 95% by dry weight recycled newsprint fibers and between about 5% and about 50% by dry weight virgin cellulose fibers, such as flax and/or peanut hull fibers. In one embodiment, the virgin cellulose fibers are, by dry weight, between about 10% and 40% flax fibers and about 60% and 90% peanut hull fibers.
Claims15
A perlite-based insulation board comprising:
- between about 50% and about 76% by dry weight expanded, perlite;
- between about 15% and about 45% by dry weight fibers wherein between about 50% and about 95% by dry weight of said fibers are recycled newsprint fibers and between about 5% and about 50% by dry weight of said fibers are virgin cellulose fibers which have not been subjected to chemical pulping to remove lignin;
- about 1% to about 5% by dry weight binder;
- about 2% to about 9% by dry weight bituminous material;
- and
- about 0% to about 3% by dry weight alum.
Dependencies are inferred from the claim text.