D - Textiles – Paper – 04 – H
Patent
D - Textiles, Paper
04
H
D04H 1/42 (2006.01) D04H 1/54 (2006.01)
Patent
CA 2096092
ABSTRACT OF THE DISCLOSURE This invention concerns a novel breathable, buoyant, thermal insulator material. The insulator material of the invention comprises an assemblage of: (a) from about 50 to 100% by weight of spun and drawn polymeric microfibers having a diameter of from about 2 to 14 microns; and (b) from about 0 to 50% by weight of synthetic poly- meric binder fibers having a diameter of from about 12 to 50 microns, wherein the resulting assemblage has a density of from about 3.0 to 10.0 lb/ft3, and apparent thermal conductivity k measured by the plate to plate method according to ASTM C518 with a heat flow down of less than about 0.3 Btu?in/hr?ft2?°F in the dry condition, water absorption less than 50% of its dry weight when immersed for one hour at a depth of 2 ft. in fresh water at a temperature of 70°F, a buoyancy greater than 40 lb/ft3 after immersion for one hour at a depth of 2 ft. in fresh water at a temperature of 70°F, and an intrinsic moisture vapor transfer rate of at least 100 times greater than that of a closed-cell foam according to Mili- tary Specification MIL-P-12420C, Type II, Class 6. 33
Donovan James G.
Schoppee Meredith M.
Albany International Corp.
Swabey Ogilvy Renault
LandOfFree
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