Felt having conductivity gradient
AssigneeMilliken & Company
InventorsAlfred R. DeAngelis, Andrew D. Child
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for making an electromagnetically conductive textile, having a conductivity gradient through the thickness of the fabric, comprising the steps of (a) forming a knit, woven or nonwoven fabric characterized by (i) a variation in fiber surface area per unit of volume, through the thickness of the fabric; or (ii) a variation in susceptibility of the fibers to coating, through the thickness of the fabric; and (b) applying a conductive coating to fibers in the fabric, to create a conductivity gradient through the thickness of the fabric.
Claims20
A method of preparing an electromagnetically conductive textile fabric, wherein the fabric comprises conductive fibers creating a conductivity gradient through the thickness of the fabric, and wherein the fabric is selected from the group consisting of woven, knitted and nonwoven fabrics, comprising the steps of:
- (a) forming a fabric selected from the group consisting of (i) a fabric in which the surface area of the fibers per unit volume varies through the thickness of the fabric;
- and (ii) a fabric containing first and second fibers, wherein the first and second fibers have different susceptibilities to being coated by a conductive coating, and wherein the relative concentration of the first and second fibers varies through the thickness of the fabric;
- and
- (b) applying a conductive coating to fibers in the fabric, thereby creating a conductivity gradient through the thickness of the fabric.
A method of preparing an electromagnetically conductive textile fabric, wherein the fabric comprises conductive fibers creating a conductivity gradient through the thickness of the fabric, and wherein the fabric is selected from the group consisting of woven, knitted and nonwoven fabrics, comprising the steps of:
- (a) forming a fabric in which the fabric varies through its thickness in a property selected from the group consisting of fiber density, fiber denier and surface area of fiber per unit volume;
- and
- (b) applying a conductive coating to the fibers, thereby creating a conductivity gradient through the thickness of the fabric.
Dependencies are inferred from the claim text.