Composite secondary carpet backing, method of manufacture thereof, and carpet made therefrom
View Patent ↗A two-layer secondary carpet backing including a woven scrim layer and a fibrous layer is described. The woven scrim layer is characterized as having a low open area and a flat weave. The two-layer secondary backing is capable of having a non-abrasive, textile back surface. The secondary carpet backing is also capable of having a construction that permits high carpet manufacturing speeds due to high air permeability and is capable of providing high dimensional stability, seam strength, and delamination strength to tufted carpets made therefrom.
1. A carpet consisting of:
a primary backing;
face yarn consisting of a plurality of filaments tufted through the primary backing; and
a binder layer adhering a stitched side of the primary backing to a secondary backing, said secondary backing consisting of:
a woven fabric layer having a flat weave which comprises at least one of a plain, satin, and twill weave construction of tape yarns in a warp direction interwoven with multifilament yarns in a filling direction, said woven fabric layer having an open area of about 15% or less, said multifilament yarns having a thickness that is at least three times the thickness of warp tapes such that gaps are formed at crossover regions formed by the multifilament yarns and warp tapes; and
a fibrous layer, wherein said fibrous layer weighs between about 0.5 osy and about 10 osy, and wherein at least a portion of said fibers have penetrated through said woven fabric layer and extend outward from a side thereof; and
wherein said secondary backing has an air permeability of greater than about 220 cfm/sq ft.
2. The carpet of claim 1 , wherein said multifilament fill yarn in the woven fabric layer of the secondary carpet backing comprises one of the following groups of yarns: open end spun yarn, ring spun yarn, bulked continuous spun yarn, and core-spun yarn.
3. The carpet of claim 1 , wherein said fill and said warp yarn comprise at least one of the following materials: polypropylene, polyester, polyamide, and polyethylene.
4. The carpet of claim 1 , wherein said portion of said fibers that penetrate said woven fabric layer and extend outward from a side thereof comprise at least 5% by weight and no more than 95% by weight.
5. The carpet of claim 1 , wherein the woven fabric layer in the secondary carpet backing has a plain weave construction with 24 wpi×6 ppi.
6. The carpet of claim 1 , wherein some of the fibers penetrating through the woven fabric layer and extending outward are fused together.