Woven fabric from splittable ribbons
AssigneeE. I. Du Pont de Nemours and Company
InventorVijayendra Kumar
Life of this patent
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Abstract
A fabric, useful as a primary carpet backing, woven in both the warp and weft directions from filmy elements in the form of longitudinally-oriented, splittable ribbons formed from a blend of a major amount of polyester and a minor amount of a polyolefin. The ribbons split longitudinally when punctured by a tufting needle, thus providing for a more secure grip on the tufted carpet yarn than that given by conventional polyester backings. The use of polyester as a principal component overcomes certain drawbacks of polypropylene backings. Alternative processes for making these fabrics, each involving a heat-treating step at a temperature of at least 150.degree. F. (66.degree. C.) for a sufficient period of time to render the ribbons splittable, are also disclosed.
Claims14
A woven fabric, useful as a primary carpet backing, composed in both the warp and the weft directions of filmy elements in the form of longitudinally-oriented, splittable ribbons formed from a blend of a major amount of polyester and a minor amount of a polyolefin.
A process for making a woven fabric comprising the steps of:
- (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin;
- (b) drawing the film to give it a longitudinal orientation;
- (c) heat-treating the film at a temperature of at least 150.degree. F. (66.degree. C.) for a sufficient time to render it splittable;
- (d) slitting the drawn and heat-treated film to form ribbons;
- (e) weaving a fabric using the ribbons in both the warp and weft directions.
A process for making a woven fabric comprising the steps of:
- (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin;
- (b) drawing the film to give it a longitudinal orientation;
- (c) slitting the drawn film to form ribbons;
- (d) heat-treating the ribbons at a temperature of at least 150.degree. F. (66.degree. C.) for a sufficient time to render them splittable;
- (e) weaving a fabric using the ribbons in both the warp and weft directions.
A process for making a woven fabric comprising the steps of:
- (a) forming a film by extruding a blend comprised of a major amount of polyester and a minor amount of a polyolefin;
- (b) drawing the film to give it a longitudinal orientation;
- (c) slitting the drawn film to form ribbons;
- (d) weaving a fabric using the ribbons in both the warp and weft directions;
- (e) heat-treating the fabric at a temperature of at least 150.degree. F. (66.degree. C.) for a sufficient time to render it splittable;
Dependencies are inferred from the claim text.