SPINNING PROCESS OF WATERLESS COLORED HEATHER YARNS

Abstract

A method of forming a colored heather yarn, comprising the sequential steps: (a) processing a natural fiber; (b) obtaining a regenerated cellulose man-made fiber that comprises an uncolored regenerated cellulose man-made fiber, a waterless dope-dyed regenerated cellulose man-made fiber, or both; (c) producing a man-made fiber that comprises an uncolored man-made fiber, a waterless dope-dyed man-made fiber, or both; (d) blending the natural fiber from step (a) with the individual fibers from step (b), step (c), or both to produce a blended composite of fibers; and (e) roving, spinning and winding the blended composite of fibers of step (d) into a final colored heather yarn; wherein the colored heather yarn comprises a predetermined fiber content ratio. There is also provided a colored heather yarn made according to the foregoing method.

Claims

1. A method of forming a colored heather yarn, comprising the steps of: a) processing a natural fiber; b) obtaining a regenerated cellulose man-made fiber that comprises an uncolored regenerated cellulose man-made fiber, a waterless dope-dyed regenerated cellulose man-made fiber, or both; c) producing a man-made fiber that comprises an uncolored man-made fiber, a waterless dope-dyed man-made fiber, or both; d) blending the natural fiber from step (a) with the individual fibers from step (b), step (c), or both to produce a blended composite of fibers; and e) roving, spinning and winding the blended composite of fibers of step (d) into a final colored heather yarn; wherein the natural fiber, the regenerated cellulose man-made fiber and the man-made fiber each have a predetermined fiber content ratio in forming the colored heather yarn.

2. The method according to claim 1, wherein the predetermined fiber content ratio of the regenerated cellulose man-made fiber is between 80% to 3%, and the predetermined fiber content ratio of the man-made fiber is between 80% to 3%.

3. The method according to claim 1, wherein the step (a) of processing said natural fiber comprises a process selected from a combed process or a carded process.

4. The method according to claim 1, wherein said waterless dope-dyed man-made fiber of step (c) comprises a waterless dope-dyed polyester fiber.

5. The method according to claim 4, wherein the step of producing the waterless dope-dyed polyester fiber comprises producing the waterless dope-dyed polyester fiber using waterless colored polyester chips.

6. The method according to claim 5, wherein the step of producing the waterless dope-dyed polyester fiber comprises: heating said waterless colored polyester chips to a molten state; and spinning the molten polyester chips to form said waterless dope-dyed polyester fiber.

7. The method according to claim 5, wherein said waterless colored polyester chips are from one or more liquid-containing vessels.

8. The method according to claim 7, wherein said one or more liquid-containing vessels are made of a biodegradable synthetic polyester.

9. The method according to claim 8, wherein said one or more liquid-containing vessels comprise said biodegradable synthetic polyester selected from the group consisting of polyethylene terephthalate (PET), polyhydroxyalkanoates (PHAs), poly-3-hydroxybutyrates (PHBs), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polylactic acid (PLA), polybutylene succinate (PBS) and polycaprolactone (PCL).

10. The method according to claim 9, wherein said one or more liquid-containing vessels are in the form of colored or uncolored PET granules.

11. The method according to claim 10, wherein the step of producing the colored PET granules comprises: selecting specific colorants; and adding and fixing said selected specific colorants to said uncolored PET granules by a thermodiffusion process.

12. The method according to claim 1, wherein the step (d) of blending the individual fibers to produce the blended composite of fibers comprises blending at least 20% of natural fiber with at least 3% of waterless dope-dyed fiber.

13. The method according to claim 1, wherein the step (d) of blending the individual fibers to produce the blended composite of fibers comprises: a first passage drawing to form a first blended fiber having a first predetermined fiber content ratio; and a second passage drawing to form a second blended fiber having a second predetermined fiber content ratio.

14. The method according to claim 13, wherein said first passage drawing step comprises drawing one dope-dyed polyester fiber with seven raw sliver fibers to form the first blended fiber having a 12.5% colored sliver fiber content ratio, the raw sliver fibers containing raw cotton sliver fibers, raw regenerated cellulose sliver fibers, or both.

15. The method according to claim 13, wherein said second passage drawing step comprises drawing two 12.5% colored sliver fibers with six raw sliver fibers to form the second blended fiber having a 3.125% colored blended heather sliver fiber content ratio, the raw sliver fibers containing raw cotton sliver fibers, raw regenerated cellulose sliver fibers, or both.

16. The method according to claim 14, wherein said second passage drawing step comprises drawing two 12.5% colored sliver fibers with six raw sliver fibers to form the second blended fiber having a 3.125% colored blended heather sliver fiber content ratio, the raw sliver fibers containing raw cotton sliver fibers, raw regenerated cellulose sliver fibers, or both.

17. A colored heather yarn made according to the method of claim 1.

18. The colored heather yarn according to claim 17, wherein the predetermined fiber content ratio of the colored heather yarn is in the range of 20/80 to 97/3 cotton/others.

19. The colored heather yarn according to claim 17, wherein the colored heather yarn has a yarn count of 21/1 Ne or coarser.

20. The colored heather yarn according to claim 17, wherein the colored heather yarn has a yarn count of 21/1 Ne or finer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying figures where like reference numerals refer to identical or functionally similar elements throughout the separate views and which together with the detailed description below are incorporated in and form part of the specification, serve to illustrate various embodiments and to explain various principles and advantages in accordance with a present embodiment.

[0013] FIG. 1A and B show two process flow charts of the entire system in accordance with a present embodiment from the beginning with raw cotton and polyester fibers under Ring (Combed and Carded) spinning system till the end of the process.

[0014] FIG. 2 is a process flow chart of a first passage drawing in accordance with the system disclosed in FIG. 1, where one dope-dyed raw or recycled polyester sliver feed (101) is combined with seven raw cotton slivers feed (102), and are sent into a first passage drawing to form the first blend of colored slivers (111) having a 12.5% colored fiber content ratio.

[0015] FIG. 3 is a process flow chart of a second passage drawing in accordance with the system disclosed in FIG. 1, where two dope-dyed colored slivers feed (111) from FIG. 2 are combined with six raw cotton slivers feed (102), and are sent into a second passage drawing to form the second blend of colored slivers (121) having a 3.125% colored fiber content ratio.

[0016] FIG. 4 shows the colored fibers being entangled with a blowing room blending in accordance with the present embodiment.

[0017] FIG. 5 shows the colored fibers aligned with a general strand direction under a sliver blend in accordance with the present embodiment.

[0018] FIG. 6 depicts a flow of steps in forming a colored heather yarn in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF DRAWINGS

[0019] Referring to FIG. 4, an illustration (400) of a blended fiber (402) shows the relatively blurred effect as the conventional dyed fiber blended at the blowing room stage is entangled with other fibers within the blend of fibers (404). The blend of fibers (404) is relatively even, therefore resulting in low visibility of the color effect, especially when the color ratio is small such as 97/3 or 95/5.

[0020] Referring to FIG. 5, an illustration (500) of a blended fiber (502) demonstrates that by feeding or blending dope-dyed polyester sliver, raw or recycled, at the drawing stage advantageously provides better alignment of small percentage of colored polyester fibers such as 97/3 or 95/5 to exhibit outstanding color effects.

DETAILED DESCRIPTION

[0021] The following detailed description is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description.

[0022] Exemplary, non-limiting embodiments of a method for forming a colored heather yarn will now be disclosed with the aid of FIG. 6, which depicts a flow of steps in forming the colored heather yarn. The method comprises the steps: (a) processing a natural fiber; (b) obtaining a regenerated cellulose man-made fiber that comprises an uncolored regenerated cellulose man-made fiber, a waterless dope-dyed regenerated cellulose man-made fiber, or both; (c) producing a man-made fiber that comprises an uncolored man-made fiber, a waterless dope-dyed man-made fiber, or both; (d) blending the natural fiber from step (a) with the individual fibers from step (b), step (c), or both to produce a blended composite of fibers; and (e) roving, spinning and winding the blended composite of fibers of step (d) into a final colored heather yarn; wherein the colored heather yarn comprises a predetermined fiber content ratio. Although FIG. 6 shows that the steps (a)-(e) are performed sequentially, the present invention is not limited to sequential execution of these steps. According to the present invention, some steps can be performed in parallel, e.g., the steps (a)-(c).

[0023] The natural fiber of step (a) may be raw cotton fiber, raw flax fiber, raw kapok fiber, raw wool fiber or raw silk fiber. The natural fiber may be raw cotton fiber and may be without any dyed colors. The natural fiber is usually provided in a form of short staple. The method may comprise the step (a) of processing the natural fiber which comprises a process selected from a combed process or a carded process. The natural fiber of step (a) may be in the form of carded natural fiber. The natural fiber of step (a) may be in the form of combed natural fiber. The process may be selected depending on the quality, yarn count, strength and package of the final colored heather yarn.

[0024] The uncolored regenerated cellulose man-made fiber and the waterless dope-dyed regenerated cellulose man-made fiber of step (b) may be obtained by purchasing. The fiber is usually provided in a form of short staple. Alternatively, the regenerated cellulose man-made fiber may be manufactured by converting natural cellulose to a soluble cellulosic derivative and then applying polymer spinning of the cellulosic derivative to form the fiber. The regenerated cellulose man-made fiber may be rayon or its variations, such as viscose, cupra, modal, deacetylated acetate and lyocell.

[0025] The waterless dope-dyed man-made fiber of step (c) may comprise a waterless dope-dyed polyester fiber. The waterless dope-dyed polyester fiber may be a raw one or a recycled one. If the fiber is the recycled one, the degree of environmental friendliness in manufacturing the waterless dope-dyed man-made fiber is improved. The step of producing the waterless dope-dyed polyester fiber may comprise producing the waterless dope-dyed polyester fiber using waterless colored polyester chips. The step of producing the waterless dope-dyed polyester fiber may further comprise: heating the waterless colored polyester chips to a molten state; and spinning the molten polyester chips to form the waterless dope-dyed polyester fiber. The waterless colored polyester chips may be heated to an appropriate temperature where the waterless colored polyester chips become a molten state. The waterless colored polyester chips may take a period of time at the appropriate temperature to become the molten state. The molten polyester chips may be spun at a suitable time to form the waterless dope-dyed polyester fiber. Practically, the dope-dyed man-made fiber is produced in a form of short staple.

[0026] The uncolored man-made fiber of step (c) may comprise an uncolored polyester fiber. The uncolored polyester fiber may be a raw one or a recycled one. If the fiber is the recycled one, the degree of environmental friendliness in manufacturing the uncolored man-made fiber is improved. The step of producing the uncolored polyester fiber may comprise producing the uncolored polyester fiber using uncolored polyester chips. The step of producing the uncolored polyester fiber may further comprise: heating the uncolored polyester chips to a molten state; and spinning the molten polyester chips to form the uncolored polyester fiber. The uncolored polyester chips may be heated to an appropriate temperature where the uncolored polyester chips become a molten state. The uncolored polyester chips may take a period of time at the appropriate temperature to become the molten state. The molten polyester chips may be spun at a suitable time to form the uncolored polyester fiber. Practically, the uncolored man-made fiber is produced in a form of short staple. The uncolored man-made fiber may not provide the colors for the final color heather yarn.

[0027] The waterless dope-dyed polyester fiber and the uncolored polyester fiber may be produced from waterless colored polyester chips and uncolored polyester chips respectively. The polyester chips may be from one or more liquid-containing vessels or from one or more new liquid-containing vessels or from both. The liquid-containing vessels may be raw or recycled. The one or more liquid-containing vessels may be made of biodegradable synthetic polyester. The biodegradable synthetic polyester may comprise polyethylene terephthalate (PET), polyhydroxyalkanoates (PHAs), poly-3-hydroxybutyrates (PHBs), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polylactic acid (PLA), polybutylene succinate (PBS) or polycaprolactone (PCL). The one or more liquid-containing vessels may be in the form of colored or uncolored PET granules. The uncolored PET granules may be colored when specific colorants are selected, added and fixed to the uncolored PET granules via a thermodiffusion process. The thermodiffusion process may not require bleaching and may not involve water during the process. The thermodiffusion process may occur at a desirable temperature suitable for the colorant particles to be moving from one region to another region. The colored PET granules may be used as color master batch and may be in an assortment of colors. In the case of uncolored polyester chip, the one or more liquid-containing vessels may be in the form of uncolored PET granules without the need to be treated by the thermodiffusion process.

[0028] The waterless dope-dyed man-made fiber may provide the colors for the final colored heather yarn. The colors of the waterless dope-dyed man-made fiber may be provided from the waterless colored polyester chips. The waterless colored polyester chips may be made of raw polyester chips that were dried under vacuum at a desirable temperature for a number of hours. The temperature may be in the range of about 140 C. to about 180 C., about 145 C. to about 180 C., about 150 C. to about 180 C., about 155 C. to about 180 C., about 160 C. to about 180 C., about 165 C. to about 180 C., about 170 C. to about 180 C., about 175 C. to about 180 C., about 140 C. to about 145 C., about 140 C. to about 150 C., about 140 C. to about 155 C., about 140 C. to about 160 C., about 140 C. to about 165 C., about 140 C. to about 170 C. or about 140 C. to about 175 C. The number of hours required for drying the raw polyester chips may be up to 24 hours, 22 hours, 20 hours, 18 hours, 16 hours, 14 hours, 12 hours, 10 hours, 8 hours, 6 hours, 4 hours or 2 hours. The vacuum-dried raw polyester chips may be blended with a designated amount of color master batch as mentioned above, and may be heated to an appropriate temperature, melted to molten state and spun into waterless dope-dyed man-made fibers by extrusion though a spinneret. The temperature for the raw polyester chips and the color master batch to be melted may be in the range of about 250 C. to about 300 C., about 250 C. to about 255 C., about 250 C. to about 260 C., about 250 C. to about 265 C., about 250 C. to about 270 C., about 250 C. to about 275 C., about 250 C. to about 280 C., about 250 C. to about 285 C., about 250 C. to about 290 C., about 250 C. to about 295 C., about 255 C. to about 300 C., about 260 C. to about 300 C., about 265 C. to about 300 C., about 270 C. to about 300 C., about 275 C. to about 300 C., about 280 C. to about 300 C., about 285 C. to about 300 C., about 290 C. to about 300 C. or about 295 C. to about 300 C.

[0029] The step (d) of blending the individual fibers to produce the blended composite of fibers may comprise blending at least 20% of natural fiber with at least 3% of man-made fiber or regenerated cellulose man-made fiber, where the man-made fiber and the regenerated cellulose man-made fiber are either uncolored or waterless dope-dyed. The step (d) of blending the individual fibers to produce the blended composite of fibers may be undertaken to ensure proper color ratio and thus proper fiber content ratio. The step (d) may comprise one or more passage drawings for forming the blended composite of fibers from the individual fibers. In one embodiment, the step (d) of blending the individual fibers to produce the blended composite of fibers comprises: a first passage drawing to form a first blended fiber having a first predetermined fiber content ratio; and a second passage drawing to form a second blended fiber having a second predetermined fiber content ratio. The first passage drawing step may comprise drawing one dope-dyed polyester fiber with seven raw sliver fibers, containing raw cotton sliver fibers and/or raw regenerated cellulose sliver fibers, to form the first blended fiber having a 12.5% colored sliver fiber content ratio. The second passage drawing step may comprise drawing two 12.5% colored sliver fibers with six raw sliver fibers, containing raw cotton sliver fibers and/or raw regenerated cellulose sliver fibers, to form the second blended fiber having a 3.125% colored blended heather sliver fiber content ratio.

[0030] The final colored heather yarn may comprise the natural fiber having a fiber content ratio of at least 20%, at least 21%, at least 22%, at least 23%, at least 24%, at least 25%, at least 26%, at least 27%, at least 28%, at least 29%, at least 30%, at least 31%, at least 32%, at least 33%, at least 34%, at least 35%, at least 36%, at least 37%, at least 38%, at least 39%, at least 40%, at least 41%, at least 42%, at least 43%, at least 44%, at least 45%, at least 46%, at least 47%, at least 48%, at least 49%, at least 50%, at least 51%, at least 52%, at least 53%, at least 54%, at least 55%, at least 56%, at least 57%, at least 58%, at least 59%, at least 60%, at least 61%, at least 62%, at least 63%, at least 64%, at least 65%, at least 66%, at least 67%, at least 68%, at least 69%, at least 70%, at least 71%, at least 72%, at least 73%, at least 74%, at least 75%, at least 76%, at least 77%, at least 78%, at least 79%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96% or at least 97%.

[0031] If the final colored heather yarn comprises the regenerated cellulose man-made fiber, the regenerated cellulose man-made fiber has a fiber content ratio of at least 3%, at least 4%, at least 5%, at least 6%, at least 7%, at least 8%, at least 9%, at least 10%, at least 11%, at least 12%, at least 13%, at least 14%, at least 15%, at least 16%, at least 17%, at least 18%, at least 19%, at least 20%, at least 21%, at least 22%, at least 23%, at least 24%, at least 25%, at least 26%, at least 27%, at least 28%, at least 29%, at least 30%, at least 31%, at least 32%, at least 33%, at least 34%, at least 35%, at least 36%, at least 37%, at least 38%, at least 39%, at least 40%, at least 41%, at least 42%, at least 43%, at least 44%, at least 45%, at least 46%, at least 47%, at least 48%, at least 49%, at least 50%, at least 51%, at least 52%, at least 53%, at least 54%, at least 55%, at least 56%, at least 57%, at least 58%, at least 59%, at least 60%, at least 61%, at least 62%, at least 63%, at least 64%, at least 65%, at least 66 /0, at least 67%, at least 68%, at least 69%, at least 70%, at least 71%, at least 72%, at least 73%, at least 74%, at least 75%, at least 76%, at least 77%, at least 78%, at least 79% or at least 80%, wherein the regenerated cellulose man-made fiber comprises any combination of the uncolored regenerated cellulose man-made fiber and the waterless dope-dyed regenerated cellulose man-made fiber.

[0032] If the final colored heather yarn comprises the man-made fiber, the man-made fiber has a fiber content ratio of at least 3%, at least 4%, at least 5%, at least 6%, at least 7%, at least 8%, at least 9%, at least 10%, at least 11%, at least 12%, at least 13%, at least 14%, at least 15%, at least 16%, at least 17%, at least 18%, at least 19%, at least 20%, at least 21%, at least 22%, at least 23%, at least 24%, at least 25%, at least 26%, at least 27%, at least 28%, at least 29%, at least 30%, at least 31%, at least 32%, at least 33%, at least 34%, at least 35%, at least 36%, at least 37%, at least 38%, at least 39%, at least 40%, at least 41%, at least 42%, at least 43%, at least 44%, at least 45%, at least 46%, at least 47%, at least 48%, at least 49%, at least 50%, at least 51%, at least 52%, at least 53%, at least 54%, at least 55%, at least 56%, at least 57%, at least 58%, at least 59%, at least 60%, at least 61%, at least 62%, at least 63%, at least 64%, at least 65%, at least 66%, at least 67%, at least 68%, at least 69%, at least 70%, at least 71%, at least 72%, at least 73%, at least 74%, at least 75%, at least 76%, at least 77%, at least 78%, at least 79% or at least 80%, wherein the man-made fiber comprises any combination of the uncolored man-made fiber and the waterless dope-dyed man-made fiber.

[0033] In the final colored heather yarn, optionally the natural fiber content and a total man-made fiber content are blended in a ratio of about 60/40, where the total man-made fiber content means a collection or an aggregate of both the regenerated cellulose man-made fiber and the waterless dope-dyed man-made fiber. The selection of the 60/40 ratio has an advantage in that the final colored heather yarn formed under this ratio offers comfort to a person when the person wears a garment made by this yarn. Practically, the ratio of the natural fiber content to the total man-made fiber content may be chosen to be at least 20/80.

[0034] The natural fiber of the blended composite of fibers may be processed via a carded process. The carded natural fiber of the blended composite of fibers may be spun into the colored heather yarn having a yarn size of 21/1 Ne or below. The natural fiber of the blended composite of fibers may be processed via a combed process. The combed natural fiber of the blended composite of fibers may be spun into the colored heather yarn having a yarn size of 21/1 Ne or above.

[0035] The blending of individual fibers from steps (a)-(c) in accordance with step (d) may prevent the excessive use of extra-long sliver fibers to compensate the fiber breakage during the blowing room, carding and drawing processes.

[0036] Processing in accordance with the above method is cost efficient and does not utilize any amount of water such that the above method does not produce effluent discharge and is sustainable and eco-friendly. The above method of forming a colored heather yarn further advantageously prevents the excessive use of extra-long sliver fibers to compensate the fiber breakage during the blowing room, carding and drawing processes.

[0037] Exemplary, non-limiting embodiments of a colored heather yarn fabricated in accordance with the above method will now be disclosed.

[0038] In the colored heather yarn, the predetermined fiber content ratio of the colored heather yarn may be in the range of about 20/80 to about 97/3, about 21/79 to about 97/3, about 22/78 to about 97/3, about 23/77 to about 97/3, about 24/76 to about 97/3, about 25/75 to about 97/3, about 26/74 to about 97/3, about 27/73 to about 97/3, about 28/72 to about 97/3, about 29/71 to about 97/3, about 30/70 to about 97/3, about 31/69 to about 97/3, about 32/68 to about 97/3, about 33/67 to about 97/3, about 34/66 to about 97/3, about 35/65 to about 97/3, about 36/64 to about 97/3, about 37/63 to about 97/3, about 38/62 to about 97/3, about 39/61 to about 97/3, about 40/60 to about 97/3, about 41/59 to about 97/3, about 42/58 to about 97/3, about 43/57 to about 97/3, about 44/56 to about 97/3, about 45/55 to about 97/3, about 46/54 to about 97/3, about 47/53 to about 97/3, about 48/52 to about 97/3, about 49/51 to about 97/3, about 50/50 to about 97/3, about 51/49 to about 97/3, about 52/48 to about 97/3, about 53/47 to about 97/3, about 54/46 to about 97/3, about 55/45 to about 97/3, about 56/44 to about 97/5, about 57/43 to about 97/3, about 58/42 to about 97/3, about 59/41 to about 97/3, about 60/40 to about 97/3, about 61/39 to about 97/3, about 62/38 to about 97/3, about 63/37 to about 97/3, about 64/36 to about 97/3, about 65/35 to about 97/3, about 66/34 to about 97/3, about 67/33 to about 97/3, about 68/32 to about 97/3, about 69/31 to about 97/3, about 70/30 to about 97/3, about 71/29 to about 97/3, about 72/28 to about 97/3, about 73/27 to about 97/3, about 74/26 to about 97/3, about 75/25 to about 97/3, about 76/24 to about 97/3, about 77/23 to about 97/3, about 78/22 to about 97/3, about 79/21 to about 97/3, about 80/20 to about 97/3, about 81/19 to about 97/3, about 82/18 to about 97/3, about 83/17 to about 97/3, about 84/16 to about 97/3, about 85/15 to about 97/3, about 86/14 to about 97/3, about 87/13 to about 97/3, about 88/12 to about 97/3, about 89/11 to about 97/3, about 90/10 to about 97/3, about 91/9 to about 97/3, about 92/8 to about 97/3, about 93/7 to about 97/3, about 94/6 to about 97/3, about 95/5 to about 97/3 or about 96/4 to about 97/3 of cotton fibers/other fibers.

[0039] The colored heather yarn may comprise carded natural fiber. The colored heather yarn comprising carded natural fiber of the blended composite of fibers may have a yarn count of 21/1 Ne or below that corresponds to a coarser yarn count. The colored heather yarn may have a yarn count of 21/1 Ne or below like 12.5/1 Ne. The colored heather yarn having a yarn count of 21/1 Ne or below may be used as throw blankets and/or towels.

[0040] The colored heather yarn may comprise combed natural fiber. The colored heather yarn comprising combed natural fiber of the blended composite of fibers may have a yarn count of 21/1 Ne or above that corresponds to a finer yarn count. The colored heather yarn may have a yarn count of 21/1 Ne or above like 26/1 Ne or 60/1 Ne. The colored heather yarn with a yarn count of 21/1 Ne or above may be used as shirts, light-weight shirts/blouse and/or beddings. The colored heather yarn may have a yarn count in the range of about 10/1 Ne to about 80/1 Ne, about 15/1 Ne to about 80/1 Ne, about 20/1 Ne to about 80/1 Ne, about 25/1 Ne to about 80/1 Ne, about 30/1 Ne to about 80/1 Ne, about 35/1 Ne to about 80/1 Ne, about 40/1 Ne to about 80/1 Ne, about 45/1 Ne to about 80/1 Ne, about 50/1 Ne to about 80/1 Ne, about 55/1 Ne to about 80/1 Ne, about 60/1 Ne to about 80/1 Ne, about 65/1 Ne to about 80/1 Ne, about 70/1 Ne to about 80/1 Ne, about 75/1 Ne to about 80/1 Ne, about 10/1 Ne to about 15/1 Ne, about 10/1 Ne to about 20/1 Ne, about 10/1 Ne to about 25/1 Ne, about 10/1 Ne to about 30/1 Ne, about 10/1 Ne to about 35/1 Ne, about 10/1 Ne to about 40/1 Ne, about 10/1 Ne to about 45/1 Ne, about 10/1 Ne to about 50/1 Ne, about 10/1 Ne to about 55/1 Ne, about 10/1 Ne to about 60/1 Ne, about 10/1 Ne to about 65/1 Ne, about 10/1 Ne to about 70/1 Ne or about 10/1 Ne to about 75/1 Ne.

[0041] The colored heather yarn in accordance with present embodiments advantageously provides superior quality with improved yarn strength due to its uniformity or evenness of fibers. The colored heather yarn in accordance with present embodiments also advantageously provides enhanced color effects with an enriched heather appearance under the same fiber content ratio as mentioned above. The colored heather yarn in accordance with present embodiments is also advantageously bleachable without the use of water during the bleaching and/or dyeing process and is benzoyl peroxide safe.

DEFINITIONS

[0042] The following words and terms used herein shall have the meanings indicated:

[0043] The term fiber content ratio is to be interpreted as a fiber weight ratio. Under a situation that a first fiber comprises a second fiber, a fiber content ratio of the second fiber is a ratio or a percentage calculated by dividing the weight of the second fiber by the weight of the first fiber.

[0044] The term spinning is to be interpreted broadly to include the textile manufacturing process where types of fiber such as cotton, flax or wool, are converted into staple yarn and then fabrics. Spinning is the process of twisting together drawn out strands of fibers to form yarn, though it is colloquially used to describe the process of drawing out, inserting the twist and winding onto bobbins. Alternatively, spinning is a process in which we convert fibers by passing them through certain processes like blowing room, carding, drawing, combing, ring frame and finally winding into yarns.

[0045] The term ring spinning as used herein includes the process of further drawing out roving to the final yarn count needed, inserting twist to the fibers by means of a rotating spindle and winding the yarn on a bobbin. These three stages take place simultaneously and continuously. Ring spinning is the most common spinning method in the world although it has additional processes compared to other spinning methods such as open-end spinning and air-jet spinning methods.

[0046] The term drawing as used herein includes the process where the fibers are blended, straightened and combined. Further, the number of fibers in the sliver is reduced or separated in order to achieve the desired linear density in the spinning process. The drawing process also improves the uniformity or evenness of the sliver. The number of drawing passages utilized depends on the spinning system used and the end products. In this regard, the raw cotton fibers and the polyester fibers are blended over two passage drawing stages to arrive at the desired fiber content ratio.

[0047] The term blowing room as used herein includes the process where the raw material packed in bale forms are opened, blended and cleaned, to remove the impurities on the surface of the raw material. The opening and blending processes ensure a consistent and homogenous blend of fibers such that the fabric will retain the best characteristics of each fiber. Blending can be done with either natural or manufactured fibers but usually utilizes various combinations of manufactured fibers or manufactured and natural fibers. This blended fiber is then passed through more machines to further loosen the fiber tufts and to clean and remove contaminants. In particular, the conventional heather yarns are usually prepared by blending the raw cotton with polyester fibers at the blowing room stage.

[0048] The terms sliver fiber and roving as used herein include a long bundle of fiber that is generally used to spin yarn. A sliver is created by a carding or combing process, which is then drawn into long strips where the fibers are parallel. When a sliver is drawn further and given a slight twist, it becomes roving. Alternatively, when the sliver is separated into roving, this roving is then used in the spinning process and is generally about the width of a pencil.

[0049] The terms carded or carding as used herein includes individualizing, aligning and further cleaning the fibers before reducing or condensing them into a single continuous strand of overlapping sliver fibers. In addition, a large proportion of short fibers and neps are also removed during the carding process. Accordingly, slivers that were subjected to the carding process would be considered carded slivers.

[0050] The terms combed or combing as used herein include the process that removes the final proportion of short fibers, neps and other impurities to create a stronger yarn. This is an optional stage, however combed yarns are usually superior in quality than carded yarns as they are generally finer, stronger, smoother and more uniform due to the removal of short fibers and the alignment of fibers. Accordingly, slivers that were subjected to the combing process would be considered combed slivers.

[0051] The term colored heather yarn as used herein includes colored blended heather yarn.

[0052] The term Denier or Den or D as used herein is a unit of measure for the linear mass density of fibers that is the mass in grams per 9000 meters of the fiber. Denier is more likely to be used in the United States and United Kingdom.

[0053] The term Ne as used herein is another measure of linear density, often known as cotton count or Number English (Ne). Under this system, the higher the numerical value, the finer the yarn. In the United States, cotton counts in the range of 1 to 20 are often referred to as coarse counts and cotton counts above 21 are referred to as fine counts.

[0054] The word substantially does not exclude completely e.g. a fiber which is substantially free from Y may be completely free from Y. Where necessary, the word substantially may be omitted from the definition of the invention.

[0055] Unless specified otherwise, the terms comprising and comprise, and grammatical variants thereof, are intended to represent open or inclusive language such that they include recited elements but also permit inclusion of additional, unrecited elements.

[0056] As used herein, the term about, in the context of concentrations of fiber components, typically means +/5% of the stated value, more typically +/4% of the stated value, more typically +/3% of the stated value, more typically, +/2% of the stated value, even more typically +/1% of the stated value, and even more typically +/0.5% of the stated value.

[0057] Throughout this disclosure, certain embodiments may be disclosed in a range format. It should be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the disclosed ranges. Accordingly, the description of a range should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, description of a range such as from 1 to 6 should be considered to have specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6 etc., as well as individual numbers within that range, for example, 1, 2, 3, 4, 5, and 6. This applies regardless of the breadth of the range.

[0058] Certain embodiments may also be described broadly and generically herein. Each of the narrower species and subgeneric groupings falling within the generic disclosure also form part of the disclosure. This includes the generic description of the embodiments with a proviso or negative limitation removing any subject matter from the genus, regardless of whether or not the excised material is specifically recited herein.

EXAMPLES

[0059] Non-limiting examples of the invention and a comparative example will be further described in greater detail by reference to specific Examples, which should not be construed as in any way limiting the scope of the invention.

Example 1

Ring (Combed) Spinning System

[0060] As demonstrated in FIG. 1A, raw cotton staple fibers undergo the blowing room process to be cleaned up, and the carding process where the fibers are further cleaned up and separated. The cotton slivers are then subjected to the drawing process to improve uniformity, and finally the combing process to remove the final proportion of short fibers, neps and other impurities. At this point, the raw cotton staple fibers (20%-97%) are ready for the first passage drawing with the regenerated cellulose sliver fiber (3%-80%) and/or the polyester sliver fiber (3-80%) having a staple length of 38 mm at 1.5 Denier as shown in FIG. 1A. The polyester sliver fiber may comprise uncoloured polyester fiber (0%-80%) and waterless dope-dyed polyester sliver fiber (0%-80%). The waterless dope-dyed polyester sliver fiber is prepared using waterless colored polyester chips heated to a molten state, and spun in the molten polyester chips into the desired staple length colored fiber. To ensure a proper fiber content ratio (20/80-97/3) during the first passage drawing stage, one dope-dyed polyester colored sliver (101) is fed with seven raw sliver fibers (102), containing raw sliver fibers, raw regenerated cellulose sliver fibers, or both, to form the first blended fiber having a 12.5% colored sliver (111) fiber content ratio as shown in FIG. 2. Then two 12.5% colored sliver fibers (111) are fed with six raw sliver fibers (102), containing raw sliver fibers, raw regenerated cellulose sliver fibers, or both, at the second passage drawing stage to form the second blended fiber having a 3.125% colored heather sliver (121) fiber content ratio as shown in FIG. 3. The combined blended heather sliver is then subjected to the roving stage where the sliver needs to be condensed or reduced into a finer strand known as a roving before it can be spun into a yarn. The roving frame draws out the sliver to a thickness of a few millimetres and inserts a small amount of twist to keep the fibers together. Finally, the desired heather yarns with a yarn size finer than 21/1 Ne, especially 60/1 Ne, that are rarely available in the commercial market are prepared from the ring spinning and winding processes.

Example 2

Ring (Carded) Spinning System

[0061] As demonstrated in Example 1 and FIG. 1B, similarly, the raw cotton staple fibers undergo the blowing room process to be cleaned up, and the fibers are further cleaned up and separated during the carding process. At this point, the raw cotton staple fibers (20%-97%) are ready for the first passage drawing with the regenerated cellulose sliver fiber (3%-80%) and/or the polyester sliver fiber (3-80%) having a staple length of 38 mm at 1.5 Denier as shown in FIG. 1B. The polyester sliver fiber may comprise uncoloured polyester fiber (0%-80%) and waterless dope-dyed polyester sliver fiber (0%-80%). The waterless dope-dyed polyester sliver fiber is prepared using waterless colored polyester chips, heated to a molten state, and spun in the molten polyester chips into the desired staple length fiber. To ensure a proper fiber content ratio (20/80-97/3) during the first passage drawing stage, one dope-dyed polyester colored sliver (101) is fed with seven raw slivers (102), containing raw cotton sliver fibers, raw regenerated cellulose sliver fibers, or both, to form the first blended fiber having a 12.5% colored sliver (111) fiber content ratio as shown in FIG. 2. Then two 12.5% colored slivers (111) are fed with six raw slivers (102), containing raw cotton sliver fibers, raw regenerated cellulose sliver fibers, or both, at the second passage drawing stage to form the second blended fiber having a 3.125% colored heather sliver (121) fiber content ratio as shown in FIG. 3. The combined blended heather sliver is then subjected to the roving stage where the sliver needs to be condensed or reduced into a finer strand known as a roving before it can be spun into a yarn. The roving frame draws out the sliver to a thickness of a few millimetres and inserts a small amount of twist to keep the fibers together. Finally, the desired heather yarns with yarn size like 21/1 Ne or coarser are prepared after the ring spinning and winding processes.

INDUSTRIAL APPLICABILITY

[0062] The colored heather yarn having a yarn count of 21/1 Ne or below may be coarser. The colored heather yarn may have a yarn count of 21/1 Ne or below like 12.5/1 Ne. The colored heather yarn having a yarn count of 21/1 Ne or below may be spun into fabric with a coarser and harsher feel. The colored heather yarn having a coarser yarn count may be used as throw blankets and/or towels.

[0063] The colored heather yarn having a yarn count of 21/1 Ne or above may be finer. The colored heather yarn may have a yarn count of 21/1 Ne or above like 26/1 Ne or 60/1 Ne. The colored heather yarn having a yarn count of 21/1 Ne or above may be spun into fabric with a finer and smoother feel. The colored heather yarn having a finer yarn count may be used as shirts, light-weight shirts/blouses and/or beddings The colored heather yarn having a yarn count of 21/1 Ne or above may be spun into fabric having superior quality, stronger and more uniform yarn. The colored heather yarn having a yarn count of 21/1 Ne or above especially 60/1 Ne may be commercially available at an affordable cost.

[0064] It will be apparent that various other modifications and adaptations of the invention will be apparent to the person skilled in the art after reading the foregoing disclosure without departing from the spirit and scope of the invention and it is intended that all such modifications and adaptations come within the scope of the appended claims.