B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/109
B01D 39/16 (2006.01) B01D 39/08 (2006.01) D04H 1/42 (2006.01) D04H 1/46 (2006.01)
Patent
CA 1261284
ABSTRACT Nonwoven fabrics of poly(m-phenylene isophthalamide) having a cross-machine modulus greater than 40. and good resistance to abrasion that is useful as a gas filtration substrate, and the process of producing such a fabric by heating an entangled web while stretching the fabric transversely 5 to 15% for a time sufficient to increase the crystallinity index at least about 0.05 units.
498540
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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