Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1995-04-24
1997-12-16
Lee, Helen
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
442340, 442341, 442351, 442415, 442333, 428297, 428903, 4289033, 428920, D04H 158, D04H 316
Patent
active
056982984
ABSTRACT:
A fibrous, non-woven thermal insulation comprises synthetic polymeric resin microfibers, staple fibers and bonding fibers which are randomly oriented and randomly intermingled in a single layer. The microfibers comprise between 0% and 95% by weight virgin synthetic polymeric resin and between 5% and 100% by weight recycled polyethylene teraphthalate. In one embodiment the microfibers have an average diameter between 1 to 10 microns and comprise between 5% and 80% by weight of the insulation; the staple fibers have an average diameter between 10 and 30 microns and comprise between 5% and 90% by weight of the insulation; and the bonding fibers have an average diameter between 0.9 and 15 denier and comprise between 5% and 95% by weight of the insulation. The bonding fibers have thermoplastic surfaces with a lower temperature softening point than the microfibers and staple fibers and bond the fibers together to form the insulation material.
REFERENCES:
patent: 4988560 (1991-01-01), Meyer et al.
patent: 4992327 (1991-02-01), Donovan et al.
patent: 5364694 (1994-11-01), Okada et al.
patent: 5407739 (1995-04-01), McCullough et al.
patent: 5437922 (1995-08-01), Jackson et al.
Jackson Fred Lee
McHugh Kevin Patrick
Robertson John Stuart
Rumiesz, Jr. Joseph
Lee Helen
Quinn Cornelius P.
Schuller International, Inc.
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