Tufted carpet having a polyolefin film as the secondary backing
AssigneeE. I. Du Pont de Nemours and Company
InventorEdward Cooper Ballard
Life of this patent
Estimating the term…
Abstract
Improved process for preparing ethylene/vinyl acetate copolymer based hot-melt adhesive backsized tufted carpet wherein polyethylene, polypropylene or ethylene/vinyl acetate copolymer film is used as the secondary backing. Such carpets have unexpectedly and significantly improved tuft pull strength.
Claims14
In a process for backsizing a tufted carpet having a primary textile backing and tufts of yarn protruding therefrom which comprises heating an ethylene/vinyl ester copolymer based hot melt adhesive backsizing composition to a temperature of about 160.degree. F. to about 400.degree. F., applying by a roll-coater a uniform coating of about 10-40 ounces per square yard of the composition in a molten state to the back side of the carpet while moving the carpet past the roll-coater, contacting the still molten adhesive coated back side of the carpet with a secondary backing, pressing the primary and secondary backings together and solidifying the adhesive, the improvement comprising the use of a polymer film, selected from the group consisting of polyethylene, polypropylene and ethylene/vinyl acetate copolymers having a vinyl acetate content of up to about 18% by weight as the secondary backing.
In a carpet comprising a primary backing stitched with closely spaced erect loops of yarn to form a tufted structure, an ethylene/vinyl ester copolymer based hot melt adhesive backsizing composition on the back side of said primary backing and a secondary backing adhered by said backsizing composition to said primary backing, the improvement comprising a secondary backing selected from the group consisting of polyethylene film, polypropylene film and ethylene/vinyl acetate copolymer film having a vinyl acetate content of up to about 18% by weight.
Dependencies are inferred from the claim text.