Lydall, Inc.

Scott/chatham Company

Stephen A Wald

John J Hiers

Robert W Carter

A textile composite is provided which comprises a non-woven textile fabric, composed of textile fibers needled together into a network of coherently entangled fibers and having an overall bulk density of between 4 and 20 lbs. per cubic foot, and a knitted textile fabric, having a weight of between 1 and 8 ozs. per square yard, bound to the needled fabric. The binding of the fabrics is such that at least one tensile property of the composite is greater than the sum of that same property of the non-woven and knitted fabrics. That same property is measurable at an extension which is the same or less than the extension at failure of the composite.

Synergistic textile composite

There is provided a filter wherein the filtering means has a non-woven needled textile filter fabric with an overall bulk density of at least 6 pounds per cubic foot and bulk density gradient such that the bulk density at the face surface of the fabric is greater than the bulk density at the back surface of the fabric. In conjunction with that bulk density gradient is a filtering gradient such that the fineness of filtration at the back face surface is greater than the fineness of filtration at the surface. The filter may be in any convenient form, such as the bag of an air conveyor filter or a vacuum cleaner filter.

Filter

There is provided a filter wherein the filtering means has a non-woven needled textile filter fabric with an overall bulk density of at least 6 pounds per cubic foot and bulk density gradient such that the bulk density at the face surface of the fabric is greater than the bulk density at the back surface of the fabric. In conjunction with that bulk density gradient is a filtering gradient such that the fineness of filtration at the face surface is greater than the fineness of filtration at the back surface. The filter may be in any convenient form, such as the bag of an air conveyor filter or a vacuum cleaner filter.

Filters

There is provided a non-woven textile composite which simulates the strength, durability, appearance, temper, smooth surface, hand and feel of natural leather and a method of producing the same. The composite includes a non-woven needled textile fabric substrate having a coherent network of randomly entangled textile fibers with an as needled overall bulk density of at least 6 pounds/cubic foot and having a face surface and a back surface, and a geometric center therebetween. A shape-sustaining immobilized polymeric composition is differentially disposed in the substrate such that there is at least 25% more polymeric composition between the face surface and the geometric center than between the back surface and the geometric center. A moldable skin coat layer may be disposed on the face surface. The substrate and the immobilized polymeric composition are in a co-compacted state such that the thickness of the co-compacted substrate and immobilized polymeric composition are less than 0.75 the thickness of the substrate in the essentially uncompacted state.

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Winston-Salem, NC, United States of America

Stephen A Wald