Tuftable fabric with balanced construction
View Patent ↗Tuftable fabrics comprise a plurality of warp and weft tapes in a balanced construction of tapes with balanced dimensions of tapes in the warp and the weft and stabilization of the fabric to impart dimensional stability. The fabrics are useful as backings for tufted carpets and especially patterned carpets and carpet tile owing to a surprising combination of tuftability, resistance to edge curl and stability during tufting.
1. Fabric suitable for tufting comprising a plurality of warp tapes and a plurality of waft tapes wherein average number of warp tapes per unit length and average number of weft tapes per unit length are the same or differ by not more than about 15%, average width of warp tapes and average width of weft tapes are the same or differ by not more than about 15%. average thickness and denier of warp tapes and average thickness and denier of weft tapes, respectively, are the same or differ by not more than about 15%; wherein a portion of the warp tapes or of the weft tapes or of both comprise polypropylene tapes that are not multi-layered and at least a portion of the warp tapes or of the weft tapes or of both are multi-layer tapes that comprise a first thermoplastic resin layer comprising a propylene-dominated propylene-ethylene copolymer or polypropylene-dominated blend of polypropylene and polyethylene and a second layer comprising a thermoplastic resin having a melting temperature higher than the melting temperature of the first thermoplastic resin layer and a plurality of tapes are heat sealed to the first thermoplastic resin layer at their crossovers with the multi-layer tapes to provide a level of dimensional stability such that a peak force of at least about 50 pounds is required to remove from the fabric ten adjacent parallel yarns disposed perpendicular to the direction in which the force is applied, and wherein such stabilization does not substantially impair tuftability of the fabric.
2. The fabric of claim 1 wherein average warp count is about 10 to about 14 tapes per inch and average weft count is about 10 to about 14 tapes per inch.
3. The fabric of claim 2 , wherein the average warp count and average weft count differ by not more than about 10%.
4. The fabric of claim 2 wherein average denier of the warp tapes and average denier of the weft tapes differ by not more than about 10%.
5. The fabric of claim 1 wherein the warp tapes are polypropylene tapes that are not multi-layered and at least a portion of the weft tapes are multi-layer tapes.
6. The fabric of claim 1 wherein at least a portion of the warp tapes are multi-layer tapes.
7. The fabric of claim 6 wherein the multi-layer tapes comprise a core layer comprising polypropylene as the second thermoplastic resin layer and the core layer is sandwiched between two first thermoplastic resin outer layers comprising a propylene-dominated propylene-ethylene copolymer, and wherein the core layer makes up from about 70% to about 90% of the thickness of the multi-layer tapes and each outer layer makes up from about 5% to about 15% of the thickness of the multi-layer tapes.
8. The fabric of claim 1 wherein at least a portion of the weft tapes are multi-layer tapes.
9. The fabric of claim 8 wherein every second weft tape is a multi-layer tape.
10. The fabric of claim 8 wherein every third weft tape is a multi-layer tape.
11. The fabric of claim 8 wherein the multi-layer tapes comprise a core layer comprising polypropylene as the second thermoplastic resin layer and the core layer is sandwiched between two first thermoplastic resin outer layers comprising a propylene-dominated propylene-ethylene copolymer, and wherein the core layer makes up from about 70% to about 90% of the thickness of the multi-layer tapes and each outer layer makes up from about 5% to about 15% of the thickness of the multi-layer tapes.
12. The fabric of claim 11 wherein every second weft tape is a multi-layer tape.
13. The fabric of claim 11 wherein every third weft tape is a multi-layer tape.
14. Fabric suitable for tufting comprising a plurality of substantially parallel warp tapes and a plurality of substantially parallel weft tapes, wherein a portion of the warp tapes or of the weft tapes or of both comprise polypropylene tapes that are not multi-layered and at least a portion of the warp tapes or of the weft tapes or of both are multi-layer tapes that comprise a first thermoplastic resin layer comprising a propylene-dominated propylene-ethylene copolymer or polypropylene-dominated blend of polypropylene and polyethylene and a second layer comprising a thermoplastic resin having a melting temperature higher than the melting temperature of the first thermoplastic resin layer with warp tapes and weft tapes being stabilized within the fabric by adhesion of a plurality of tapes to the first thermoplastic resin layer at their crossovers with the multi-layer tapes to provide a level of dimensional stability such that a peak force of at least about 50 pounds is required to remove from the fabric ten adjacent parallel yarns disposed perpendicular to the direction in which the force is applied, but wherein such stabilization does not substantially impair tuftability of the fabric; and wherein
(a) warp tapes and weft tapes are disposed so as to provide substantially full coverage without substantial overlap of warp tapes with other warp tapes and without substantial overlap of weft tapes with other weft tapes,
(b) average count of warp tapes and average count of weft tapes are the same or different by no more than about 15% and range from about 8 to about 14 tapes per inch,
(c) average thicknesses of warp tapes and average thicknesses of weft tapes are the same or different by no more than about 15% and range from about 1.8 to about 2.6 mils, and
(d) average deniers of warp tapes and average deniers of weft tapes are the same or different by no more than about 15% and range from about 650 to about 1750.
15. The fabric of claim 14 wherein at least a portion of the warp tapes are multi-layer tapes.
16. The fabric of claim 15 wherein the multi-layer tapes comprise a core layer comprising polypropylene as the second thermoplastic resin layer and the core layer is sandwiched between two first thermoplastic resin outer layers comprising a propylene-dominated propylene-ethylene copolymer, and wherein the core layer makes up from about 70% to about 90% of the thickness of the multi-layer tapes and each outer layer makes up from about 5% to about 15% of the thickness of the multi-layer tapes.
17. The fabric of claim 14 wherein at least a portion of the weft tapes are multi-layer tapes.
18. The fabric of claim 17 wherein the multi-layer tapes comprise a core layer comprising polypropylene as the second thermoplastic resin layer and the core layer is sandwiched between two first thermoplastic resin outer layers comprising a propylene-dominated propylene-ethylene copolymer, and wherein the core layer makes up from about 70% to about 90% of the thickness of the multi-layer tapes and each outer layer makes up from about 5% to about 15% of the thickness of the multi-layer tapes.