Stretch circular knit fabrics with multiple elastic yarns
View Patent ↗An article comprising a knit fabric having a surface side and a base side, and including a set of ground yarns and a layer of effect yarns, wherein the ground yarns and effect yarns are knit through intermesh points in a predetermined arrangement wherein the effect yarns are alternately arranged with the ground yarns and wherein the ground yarns comprise at least one elastic fiber and optionally at least one hard fiber, and the effect yarns comprise at least one hard fiber and optionally an elastic fiber.
1. An article comprising a knit fabric having a surface side and a base side, and including a set of ground yarns and a layer of effect yarns, wherein the ground yarns and effect yarns are knit through intermesh points in a predetermined arrangement wherein the effect yarns are alternately arranged with the ground yarns and wherein the ground yarns comprise at least one elastic fiber, and the effect yarns comprise at least one hard fiber and optionally an elastic fiber;
the base side of the fabric has jersey stitch loop structure formed from ground yarns, and the surface side of the fabric has a woven appearance resulting from the flat floats of the effect yarns and the intermesh point patterns; and
said knit fabric includes at least one of:
(a) a ratio of effect yarn denier to ground yarn denier of about 1.0:1.0 to about 10:1;
(b) a ratio of float count to loop count of about 2:1 to about 6:1;
(c) the effect yarn floats over at least 2 wales, but no more than 6 wales along the course between adjacent intermesh points; or
(d) the elastic fiber comprises at least 1% of total fabric weight; and combinations thereof.
2. The article of claim 1 , wherein the elastic fiber content is about 1% to about 65%.
3. The article of claim 2 , wherein the elastic fiber content is about 2% to about 50%, of total fabric weight.
4. The article of claim 1 , wherein the fabric has no grin-through of jersey loop base from the fabric surface.
5. The article of claim 1 , wherein the elastic fiber comprises elastomeric fiber and the content of the elastomeric fiber is higher than 2% of total fabric weight with the elastomeric fiber having at least 2× draft.
6. The article of claim 1 , wherein the elastic fiber comprises a non-elastomeric elastic fiber; the content of the non-elastomeric fiber is higher than 5% of total fabric weight, with denier between 10 denier and 450 denier.
7. The article of claim 1 , wherein the elastic fiber is spandex fiber, the content of the elastomeric fiber is higher than 2% of total fabric weight with the spandex having at least 2× draft.
8. The article of claim 1 , wherein the elastic fiber is polyester bi-component fiber, the content of the polyester bi-component fiber is about 5% to about 65% of total fabric weight.
9. The article of claim 1 , wherein the elastic fibers contain both elastomeric and non-elastomeric fibers, the content of elastomeric fiber is at least 1% and the non-elastomeric fibers are at least 5% of total fabric weight.
10. The article of claim 1 , wherein the ground yarns form the jersey loop base with plain jersey stitch loops in every needle wales of successive courses of the fabric.
11. The article of claim 1 , wherein the float length is 2 floats.
12. The article of claim 1 , wherein the float length is 3 floats.
13. The article of claim 1 , wherein the hard fiber of ground yarn is selected from the group consisting of wool, linen, silk, polyester, nylon, olefin, cotton, cellulosic fibers, such as lyocell and rayon fibers and combinations thereof, with denier range from 15 D to 600.
14. The article of claim 1 , wherein the hard fiber of ground yarn is textured polyester or nylon filaments.
15. The article of claim 1 , wherein the size of effect yarn is between 50S to 6S English count number and the effect yarns are single end, or multiple twist threads or multiple separated ends.
16. The article of claim 1 , wherein the knit loop pattern of intermesh between ground yarn and effects yarns are float structure.
17. The article of claim 1 , wherein the effect yarn are cotton staple spun yarn.
18. The article of claim 1 , wherein the hard yarn are dyed before knitting.
19. The article of claim 1 , wherein the hard yarn are indigo dyed yarn.
20. The article of claim 1 , wherein only the effect yarn is dyed in one color and ground yarns are dyed in different color or are not dyed.
21. The article of claim 1 , wherein intermesh points form the diagonal lines with woven twill appearance.
22. The article of claim 1 , wherein the fabric has stretch in the wales and course direction with fabric stretch at least 10% and at least 75% fabric recovery.
23. The article of claim 1 , wherein said fabric comprises a garment.
24. The article of claim 23 , wherein the fabric has different stretch level and recovery in certain parts of the garment, such as knee, tight and butt.
25. The article of claim 1 , wherein the garments are dyed and wet finished in garment form.
26. The article of claim 1 wherein the ground yarns further comprise at least one hard fiber.