High performance fabrics for cartridge filters
AssigneeE. I. Du Pont de Nemours and Company
InventorHerman Hans Forsten
Life of this patent
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Abstract
The present invention relates to a stiffened fabric for use in cartridge filters comprising flat fabric formed from entangled heat resistant staple fibers having a weight of from 4 to 8 oz/yd.sup.2 wherein the stiffened fabric is characterized by a flex modulus of at least 10 KSI measured at 200.degree. C.
Claims6
A stiffened, porous, fabric for use in cartridge filters comprising a spunlaced fabric formed from entangled heat resistant staple fibers having a weight of from 4 to 8 oz/yd.sup.2 and a resin wherein the stiffened fabric exhibits a flex modulus from about 10 to 60 KSI at room temperature and at least 10 KSI at 200.degree. C.
A stiffened, pleated, porous, fabric for use in cartridge filters comprising a spunlaced fabric having a weight of from 4 to 8 oz/yd.sup.2 formed from entangling heat resistant fibers wherein at least 80% by weight of the heat resistant fibers are m-aramid fibers having a crystallinity index of about 0.25 and wherein the stiffened fabric has a crystallinity index of at least about 0.45 and a flex modulus of at least 20 KSI at 200.degree. C.
Dependencies are inferred from the claim text.