High performance hot melt adhesive backsizing compositions and carpet made therewith
AssigneeE. I. Du Pont de Nemours and Company
InventorGeorge Elmer Smedberg
Life of this patent
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Abstract
Hot melt backsize compositions having high tensile elongation which result in tufted carpets having improved tuft bind comprise a blend of ethylene/vinyl ester copolymer, hydrocarbon resin, and, optionally, low molecular weight polyethylene, paraffin wax, anti-oxidant and filler.
Claims10
A composition having a tensile elongation of about 50 to 400 percent comprising
- A. about 3 to 15 weight percent ethylene/vinyl ester copolymer having a melt index of about 2 to 100, a copolymerized ethylene content of about 67 to 90 weight percent, a copolymerized vinyl ester content of about 10 to 33 weight percent, wherein the acid moiety of said vinyl ester contains 1-4 carbon atoms,
- B. about 15 to 40 weight percent of a hydrocarbon resin or a mixture of several hydrocarbon resins having a ring and ball softening point of about 50.degree. -70.degree. C. and a viscosity of 0.5 to 1.5 poise at 135.degree. C.,
- C. 0 to about 3 weight percent of a low molecular weight ethylene homopolymer having a molecular weight of about 1500-4000, density of 0.91-0.96 g./cm..sup.3 and a melting point of about 220.degree. F.-270.degree. F.
- D. 0 to about 3 weight percent of a paraffin wax,
- E. 0 to 0.3 weight percent of an antioxidant, and
- F. about 40 to 75 percent filler.
A carpet comprised of a primary backing material stitched with closely spaced erect loops of yarn to form a tufted structure, the bottom surface of the tufted structure having as a tuft bonding backsize adhesive coating the composition of claim 17, said carpet having an average tuft bind of at least 10 pounds.
Dependencies are inferred from the claim text.