US20220034005A1 - Method of Industrial Producing Elastomeric Yarn and Fabric thereof - Google Patents
Method of Industrial Producing Elastomeric Yarn and Fabric thereof Download PDFInfo
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- US20220034005A1 US20220034005A1 US17/309,413 US202017309413A US2022034005A1 US 20220034005 A1 US20220034005 A1 US 20220034005A1 US 202017309413 A US202017309413 A US 202017309413A US 2022034005 A1 US2022034005 A1 US 2022034005A1
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- Prior art keywords
- yarn
- draft
- stretch yarn
- stretch
- filament
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- 239000004744 fabric Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title description 3
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 13
- 229920000742 Cotton Polymers 0.000 claims description 22
- 229920000728 polyester Polymers 0.000 claims description 13
- -1 wool Substances 0.000 claims description 13
- 229920002334 Spandex Polymers 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000004759 spandex Substances 0.000 claims description 9
- 229920000297 Rayon Polymers 0.000 claims description 8
- 239000002964 rayon Substances 0.000 claims description 8
- 239000000806 elastomer Substances 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 210000002268 wool Anatomy 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 9
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 8
- 238000009987 spinning Methods 0.000 description 7
- 238000007378 ring spinning Methods 0.000 description 5
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000004900 laundering Methods 0.000 description 1
- 238000007383 open-end spinning Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000874 polytetramethylene terephthalate Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
- D02G3/324—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic using a drawing frame
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/56—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads elastic
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
- D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/41—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific twist
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/01—Natural vegetable fibres
- D10B2201/02—Cotton
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2211/00—Protein-based fibres, e.g. animal fibres
- D10B2211/01—Natural animal fibres, e.g. keratin fibres
- D10B2211/02—Wool
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/08—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated carboxylic acids or unsaturated organic esters, e.g. polyacrylic esters, polyvinyl acetate
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
Definitions
- the present invention relates to elastomeric yarns and fabrics, and a method of producing the same.
- Conventional yarn is a product of substantial length and relatively small cross-section consisting of fibers and/or filament(s) with or without twist.
- the choice of fibers and the specification on the yarn determines the qualities and the characteristics of the fabric.
- more and more consumers are concentrating to find some products with functional properties like thermal resistance, easy-care, easy dry, UV protection, etc. The last but not the least is body-fit products which have good stretch and recovery.
- U.S. Pat. Nos. 3,671,379, 6,782,923 and 7,143,790 disclose the way of making woven stretch fabric by comprising those bare polyester filaments said bi-component polyester filament.
- the invention is limited on the stretch, in general, in the range from 15-25% but not limited and have synthetic feel although the recovery is acceptable. Only limited use in weft of the denim without over dyed and cannot use in piece dyed unless do the two parts dyed. In this case, the cost is higher and the stretch properties are also affected.
- U.S. Pat. Nos. 7,299,828 and 7,637,091 disclose that core spun yarn with bi-component polyester comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) or poly(trimethylene terephthalate) and poly(tetramethylene terephthalate) or poly(trimethylene terephthalate) and poly(trimethylene terephthalate) can improve the synthetic feel with a natural fiber look. However, its stretch is affected and much worse than bare bi-component polyester.
- the objective of the present invention is to make ring spun yarn by using different drafts on the core elastomeric filaments in the ring spun yarn and by which, not limited, to improve the mechanical to get the good shrinkage, good recovery and stretch.
- the present invention is a ring spun yarn with at least two elastomeric filament with at least two different main drafts.
- the main draft in individual filament is the average of variable draft used.
- said filament ranges from 20 deniers to 500 deniers.
- said filament ranges from 20 deniers to 140 deniers.
- the present invention comprises two fibrous sheath and said, are those short staple fibers can be natural or synthetic fibers like cotton, rayon, polyester, wool, acrylic and a combination thereof. And have no restriction same as the normal ring spun yarn.
- the yarn count of present invention has no limitation, preferably ranging from English Cotton yarn count from about Ne 4 to Ne 60.
- the present invention also has an objective to use this composite yarn is in denim and piece dyed fabric and not limited to knit fabric as well as sweater.
- FIG. 1 depicts the side view of the apparatus for the present invention of normal ring spinning machine.
- FIG. 2 depicts the side view of the apparatus for the present invention of using two elastomeric filaments with different drafts with two roving.
- FIG. 3 depicts the view of position of the elastomeric filaments in the yarn with variable draft in the same yarn.
- FIG. 4 depicts the view of position of the elastomeric filament in the yarn if the draft is the same.
- FIG. 5 depicts the side view of the apparatus for the present invention of using three elastomeric filaments with different drafts with three roving.
- FIG. 6 depicts the view of position of three elastomeric filaments in the yarn with variable draft.
- the objective of the present invention is to find a way to produce a ring spun yarn by using elastomeric filament (not limited to spandex and other elastomers also applicable) to achieve good elongation, good recovery and less shrinkage without affecting other physical properties both in yarn and in fabric.
- the present yarn is suitable for denim, piece dyed, circular knit and sweater as well.
- the present invention is a ring spun yarn comprising at least two elastomeric filaments (not limited to spandex and other elastomers also applicable) with at least two different mean drafts. And said the filament ranges from 20 deniers to 500 deniers, and preferably from 20 deniers to 140 deniers, wherein the draft of the filaments ranges from 1.05 to 5.
- the yarn count of the ring spun yarn has no limitation and said ranges from Ne 4 to 60 preferable.
- spinning is the final stage of processing that produces a continuous twisted strand of fibers which has received its final attenuation.
- FIG. 1 it shows the skills in the art.
- the main sections include material [A], drafting [B] and twisting [C] as in FIG. 1 .
- the material used in [A] is those natural or synthetics staple fibers, not limited to cotton, rayon, polyester, wool, acrylic, etc. or a combination thereof. It consists of two roving with the same material or two different materials.
- aprons are mounted with the middle rolls 42 .
- the speed ratio of each pair of roll is so adjusted that the fibers 10 are delivered through a trumpet 61 from a slowly moving pair of rolls 43 towards a rapidly moving pair of rolls 41 .
- the final yarn count depends on the yarn count of the material 10 and the ratio of the linear speed between these pair of rolls 41 , 43 for those normal yarns.
- the strength of the yarn depends on the material and the twist added in the twisting section [C].
- the present invention of this stretch yarn is produced by inserting at least two elastomeric filaments into the core of the fibers sheath of the described ring spun yarn.
- the apparatus [D] is shown in FIG. 2 .
- the material of these two types of elastomeric filaments 21 , 31 can be the same or with different material, like those spandex or elastomer or a combination thereof.
- the draft is one of the most important related factors in the present invention.
- the elastomeric filaments 21 are unwound from the rollers 22 , 23 whereas elastomeric filaments 31 are unwound from the rollers 32 , 33 .
- the draft on the elastomeric filament 21 is controlled by the ratio of the surface speed of front roller 41 and roller 23 whereas the draft on the elastomeric filament 31 is controlled by the ratio of the surface speed of front roller 41 and the roller 33 .
- the mean drafts of these filaments are ranging from 1.05 to 5.
- the elastomeric filament is positioned in the left to center of the fibrous sheath but not limited.
- the ratio of the surface speed of the front roller 41 and roller 23 , and the surface speed of roller 41 and roller 33 are controlled by program throughout the spinning process.
- the variables are denoted as:
- D 2 ⁇ 1 D 2 ⁇ 3 ⁇ 1 ⁇ T 2 ⁇ 3 ⁇ 1 + D 232 ⁇ T 232 + D 233 ⁇ T 233 ⁇ ⁇ ... + D 23 ⁇ X ⁇ T 2 ⁇ 3 ⁇ X T 2 ⁇ 3 ⁇ 1 + T 2 ⁇ 3 ⁇ 2 + T 2 ⁇ 3 ⁇ 3 ⁇ ⁇ ... + T 2 ⁇ 3 ⁇ X
- D 3 ⁇ 1 D 3 ⁇ 3 ⁇ 1 ⁇ T 3 ⁇ 3 ⁇ 1 + D 332 ⁇ T 332 + D 333 ⁇ T 333 ⁇ ⁇ ... + D 33 ⁇ X ⁇ T 3 ⁇ 3 ⁇ X T 3 ⁇ 3 ⁇ 1 + T 3 ⁇ 3 ⁇ 2 + T 3 ⁇ 3 ⁇ 3 ⁇ ⁇ ... + T 3 ⁇ 3 ⁇ X
- variable drafts are ⁇ 50% amongst individual mean draft, but not limited.
- FIG. 3 it is the view of the position of that elastomeric filament on the yarn with different draft ratio and time whereas, in FIG. 4 , the draft ratio on single elastomeric filament is the same and not limited that both draft of the elastomeric filament is the same.
- Another embodiment of the invention have inserted 3 elastomeric filaments into the core of the fibers sheath as in FIG. 5 .
- the material of these three types of elastomeric filaments 21 , 31 , 51 can be the same or with different material but at least two of them are elastomeric filaments (spandex) and the other one can be those polyester, nylon, PE synthetic filaments, not limited to elastic or inelastic or a combination thereof.
- the filament 21 is unwound from the rollers 22 , 23 whereas filament 31 is unwound from the rollers 32 , 33 and filament 51 is unwound from the rollers 52 , 53 .
- the draft on the filament 21 is controlled by the ratio of the surface speed of front rollers 41 and roller 23 whereas the draft on the filament 31 is controlled by the ratio of the surface speed of front roller 41 and the roller 33 and the same.
- the draft on the filament 51 is controlled by the surface speed of front roller 41 and roller 53 .
- the mean drafts of these filaments are ranging from 1.05 to 5.
- the elastomeric filament is positioned in the left to center of the fibrous sheath but not limited.
- the ratio of the surface speed of the front roller 41 and roller 23 , the surface speed of roller 41 and roller 33 , and the surface speed of roller 41 and roller 53 are controlled by program.
- the variables are denoted as:
- D 2 ⁇ 1 D 2 ⁇ 3 ⁇ 1 ⁇ T 2 ⁇ 3 ⁇ 1 + D 232 ⁇ T 232 + D 233 ⁇ T 233 ⁇ ... + D 23 ⁇ X ⁇ T 2 ⁇ 3 ⁇ X T 2 ⁇ 3 ⁇ 1 + T 2 ⁇ 3 ⁇ 2 + T 2 ⁇ 3 ⁇ 3 ⁇ ... + T 2 ⁇ 3 ⁇ X
- D 31 D 331 ⁇ T 331 + D 332 ⁇ T 332 + D 333 ⁇ T 333 ⁇ ... + D 33 ⁇ X ⁇ T 33 ⁇ X T 331 + T 332 + T 333 ⁇ ... + T 33 ⁇ X
- D 51 D 531 ⁇ T 531 + D 532 ⁇ T 532 + D 533 ⁇ T 533 ⁇ ... + D 53 ⁇ X ⁇ T 53 ⁇ X T 531 + T 532 + T 533 ⁇ ... + T 53 ⁇ X
- variable drafts In practice, the difference of those variable drafts is ⁇ 50% amongst individual mean draft, but not limited.
- variable draft should be as
- a denim stretch fabric, construction 3/1 RHT, with 100% cotton Ne 10 in the warp and with Ne16 Stretch yarn in accordance with the present invention is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.5.
- a denim stretch fabric, construction 3/1 RHT, with 100% cotton Ne 8 in the warp and with Ne16 Stretch yarn in accordance with the present invention is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8. We can see the sample had weight 11.9 oz/sq.yd. (after washed), good stretch (36.26%), good shrinkage ( ⁇ 11%) and acceptable growth (4.9%).
- the invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier with less pick, said 48. Both of the average draft is with 3.5.
- the invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8.
- the invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8.
- the invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8. We can see the sample had weight 12.2 oz/sq.yd. (after washed), good stretch (34.4%), good shrinkage ( ⁇ 9%) and growth (3.06%).
- the invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8.
- the invention in the weft yarn is with cotton fibrous sheath and core with two rubber threads. Both of the average draft is with 3.2. We can see the sample had weight 13 oz/sq.yd. (after washed), good stretch (55.4%), good shrinkage ( ⁇ 9%) and growth (5%).
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The present invention relates to make stretch yarn by using at least two roving and two elastomeric filaments with variable draft to allow the yarn made in the fabric to get good stretch, good recovery and good shrinkage. The invention is applicable for all types of fibers material and is not limited in the yarn count. The said invention yarn is woven into fabrics exhibiting the excellent stretch characteristics and functional performance for commercial application.
Description
- This application claims priority to Hong Kong Short-Term Patent Application No. 19131094.5 filed on Oct. 16, 2019, the disclosure of which is incorporated by reference herein in its entirety.
- The present invention relates to elastomeric yarns and fabrics, and a method of producing the same.
- For the technical terms elaborated as follows and used herein, reference is made to Textile Terms and Definitions (Ninth Edition) and ASTM.
-
- Elastomer: any polymer having high extensibility together with rapid and substantially complete elastic recovery.
- Elastomeric Filament: a filament formed from elastomer, for example elastane or elastodiene.
- Filament: a fiber of indefinite length.
- Roving: a name given, individually or collectively, to the relatively fine fibrous strands used in the later of final processes of preparation of spinning.
- Stretch: yarn capable of a pronounced degree of stretch and recovery from stretch.
- Draft: to reduce the linear density of a fibrous assembly by drawing.
- Shrinkage: reduction in length (or width) of a fiber, yarn, fabric or other textile, induced by conditioning, wetting, steaming, chemical treatment, wet processing as in laundering, dry heat or mechanical action.
- Fabric Growth: is calculated from the length difference between the bench marks prior to application of the tension and after relaxation.
- Twist Multiplier: means in a yarn, the product of twist level and is the same as Twist per inch divided by square root of Ne.
- Conventional yarn is a product of substantial length and relatively small cross-section consisting of fibers and/or filament(s) with or without twist. The choice of fibers and the specification on the yarn determines the qualities and the characteristics of the fabric. Nowadays, more and more consumers are concentrating to find some products with functional properties like thermal resistance, easy-care, easy dry, UV protection, etc. The last but not the least is body-fit products which have good stretch and recovery.
- Throughout the years, spinners tried to produce the yarn with high stretch by different material, different denier of the spandex and combination in order to get those characteristics so a wide range of products have been developed. Of course, they have a lot of restriction amongst these and need additional finishing process which is not cost effective.
- As years before, many spinners commonly use that pre-stretched elastomeric fibers (that called spandex or elastane) and guided in the center of the drafted fiber sheath to produce those core stretch yarn. By controlling the denier and the draft, different stretch result will come out. Woven fabric made of such yarn will have the problem of poor recovery/shrinkage, the higher the stretch, the poorer the result. In some cases, additional heat-setting is a necessary to improve the dimensional stability of the fabric which is cost consuming.
- U.S. Pat. Nos. 3,671,379, 6,782,923 and 7,143,790 disclose the way of making woven stretch fabric by comprising those bare polyester filaments said bi-component polyester filament. The invention is limited on the stretch, in general, in the range from 15-25% but not limited and have synthetic feel although the recovery is acceptable. Only limited use in weft of the denim without over dyed and cannot use in piece dyed unless do the two parts dyed. In this case, the cost is higher and the stretch properties are also affected.
- U.S. Pat. Nos. 7,299,828 and 7,637,091 disclose that core spun yarn with bi-component polyester comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) or poly(trimethylene terephthalate) and poly(tetramethylene terephthalate) or poly(trimethylene terephthalate) and poly(trimethylene terephthalate) can improve the synthetic feel with a natural fiber look. However, its stretch is affected and much worse than bare bi-component polyester.
- Others like U.S. Pat. Nos. 8,093,160 and 9,303,336 disclose that core spun yarn with polyester filament (with/without elastic) and elastomeric fibers (spandex) which can improve the stretch to the range 20%-60% and can achieve a good recovery. However, it faces the problem of the white portion at the piecing part and some un-coverage of those filaments and is limited to certain extent for using in warp of denim and piece dyed stretch fabric.
- The objective of the present invention is to make ring spun yarn by using different drafts on the core elastomeric filaments in the ring spun yarn and by which, not limited, to improve the mechanical to get the good shrinkage, good recovery and stretch.
- The present invention is a ring spun yarn with at least two elastomeric filament with at least two different main drafts. The main draft in individual filament is the average of variable draft used. In one embodiment, said filament ranges from 20 deniers to 500 deniers. Preferably, said filament ranges from 20 deniers to 140 deniers.
- The present invention comprises two fibrous sheath and said, are those short staple fibers can be natural or synthetic fibers like cotton, rayon, polyester, wool, acrylic and a combination thereof. And have no restriction same as the normal ring spun yarn.
- In another embodiment said, the yarn count of present invention has no limitation, preferably ranging from English Cotton yarn count from about Ne 4 to Ne 60.
- The present invention also has an objective to use this composite yarn is in denim and piece dyed fabric and not limited to knit fabric as well as sweater.
- Other aspects of the present invention are disclosed as illustrated by the embodiments hereinafter.
-
FIG. 1 depicts the side view of the apparatus for the present invention of normal ring spinning machine. -
FIG. 2 depicts the side view of the apparatus for the present invention of using two elastomeric filaments with different drafts with two roving. -
FIG. 3 depicts the view of position of the elastomeric filaments in the yarn with variable draft in the same yarn. -
FIG. 4 depicts the view of position of the elastomeric filament in the yarn if the draft is the same. -
FIG. 5 depicts the side view of the apparatus for the present invention of using three elastomeric filaments with different drafts with three roving. -
FIG. 6 depicts the view of position of three elastomeric filaments in the yarn with variable draft. - The objective of the present invention is to find a way to produce a ring spun yarn by using elastomeric filament (not limited to spandex and other elastomers also applicable) to achieve good elongation, good recovery and less shrinkage without affecting other physical properties both in yarn and in fabric. The present yarn is suitable for denim, piece dyed, circular knit and sweater as well. The present invention is a ring spun yarn comprising at least two elastomeric filaments (not limited to spandex and other elastomers also applicable) with at least two different mean drafts. And said the filament ranges from 20 deniers to 500 deniers, and preferably from 20 deniers to 140 deniers, wherein the draft of the filaments ranges from 1.05 to 5. In another embodiment, the yarn count of the ring spun yarn has no limitation and said ranges from Ne 4 to 60 preferable.
- It is well known that the ways of making staple spun yarns are ring spinning, Open-End Spinning and that of Jet Spinning, amongst those, Ring Spinning is one of the most common way. The present invention is using this Ring Spinning Technology.
- The embodiments and the examples disclosed herein are made to show the present invention and are not intended to be limiting.
- In the ring spinning production, spinning is the final stage of processing that produces a continuous twisted strand of fibers which has received its final attenuation. In
FIG. 1 , it shows the skills in the art. - During the normal spinning process, the main sections include material [A], drafting [B] and twisting [C] as in
FIG. 1 . In the present invention, the material used in [A] is those natural or synthetics staple fibers, not limited to cotton, rayon, polyester, wool, acrylic, etc. or a combination thereof. It consists of two roving with the same material or two different materials. - In the drafting system [B] consists of three pair of
rolls fibers 10 are delivered through atrumpet 61 from a slowly moving pair ofrolls 43 towards a rapidly moving pair ofrolls 41. The final yarn count depends on the yarn count of thematerial 10 and the ratio of the linear speed between these pair ofrolls - The present invention of this stretch yarn is produced by inserting at least two elastomeric filaments into the core of the fibers sheath of the described ring spun yarn. The apparatus [D] is shown in
FIG. 2 . The material of these two types ofelastomeric filaments elastomeric filaments 21 are unwound from therollers elastomeric filaments 31 are unwound from therollers elastomeric filament 21 is controlled by the ratio of the surface speed offront roller 41 androller 23 whereas the draft on theelastomeric filament 31 is controlled by the ratio of the surface speed offront roller 41 and theroller 33. In one embodiment of the present invention, the mean drafts of these filaments are ranging from 1.05 to 5. And that the elastomeric filament is positioned in the left to center of the fibrous sheath but not limited. - In the present invention, the ratio of the surface speed of the
front roller 41 androller 23, and the surface speed ofroller 41 androller 33 are controlled by program throughout the spinning process. The variables are denoted as: - Surface speed of
roller 41/surface speed of roller 23: D231, D232, D233 . . . D23X
Surface speed ofroller 41/surface speed of roller 33: D331, D332, D333 . . . D33X - The draft of D231, D232, D233 D23X is running at different time as in
- T231, T232, T233 . . . T23X
- The draft of D331, D332, D333 . . . & D33X is running at different time as in
- T331, T332, T333 . . . T33X
- Therefore, the mean draft [D21] of that
filament 21 is calculated as -
- The mean draft [D31] of that
filament 31 is calculated as -
- In practical, the difference of those variable drafts is ±50% amongst individual mean draft, but not limited.
- It is calculated as:
-
0.50≤(D 231−1)/(D 21−1)≤1.50 -
0.50≤(D 232−1)/(D 21−1)≤1.50 -
0.50≤(D 23X−1)/(D 21−1)≤1.50 . . . etc. -
D 21 ,D 231 ,D 232 . . . D 23X≥1 and -
0.50≤(D 331−1)/(D 31−1)≤1.50 -
0.50≤(D 332−1)/(D 31−1)≤1.50 -
0.50≤(D 333−1)/(D 31−1)≤1.50 . . . etc. -
D 31 ,D 331 ,D 332 . . . D 33X≥1 - In
FIG. 3 , it is the view of the position of that elastomeric filament on the yarn with different draft ratio and time whereas, inFIG. 4 , the draft ratio on single elastomeric filament is the same and not limited that both draft of the elastomeric filament is the same. - Another embodiment of the invention, have inserted 3 elastomeric filaments into the core of the fibers sheath as in
FIG. 5 . The material of these three types ofelastomeric filaments filament 21 is unwound from therollers filament 31 is unwound from therollers filament 51 is unwound from therollers 52, 53. The draft on thefilament 21 is controlled by the ratio of the surface speed offront rollers 41 androller 23 whereas the draft on thefilament 31 is controlled by the ratio of the surface speed offront roller 41 and theroller 33 and the same. The draft on thefilament 51 is controlled by the surface speed offront roller 41 and roller 53. In one embodiment of the present invention, the mean drafts of these filaments are ranging from 1.05 to 5. And that the elastomeric filament is positioned in the left to center of the fibrous sheath but not limited. - In the present invention, the ratio of the surface speed of the
front roller 41 androller 23, the surface speed ofroller 41 androller 33, and the surface speed ofroller 41 and roller 53 are controlled by program. The variables are denoted as: - Surface speed of
roller 41/surface speed of roller 23: D231, D232, D233 . . . D23X
Surface speed ofroller 41/surface speed of roller 33: D331, D332, D333 . . . D33X
Surface speed ofroller 41/surface speed of roller 53: D531, D532, D533 . . . D53X - The draft of D231, D232, D233 . . . D23X is running at different time as in
- T231, T232, T233 . . . T23X
- The draft of D331, D332, D333 . . . D33X is running at different time as in
- T331, T332, T333 . . . T33X
- The draft of D531, D532, D533 . . . D53X is running at different time as in
- T531, T532, T533 . . . T53X
- Therefore, the mean draft [D21] of that
filament 21 is calculated as -
- The mean draft [D31] of that
filament 31 is calculated as -
- The mean draft [D51] of that
filament 51 is calculated as -
- In practice, the difference of those variable drafts is ±50% amongst individual mean draft, but not limited.
- Same as previous, the variable draft should be as
-
0.50≤(D 531−1)/(D 51−1)≤1.50 -
0.50≤(D 532−1)/(D 51−1)≤1.50 -
0.50≤(D 53−1)/(D 51−1)≤1.50 . . . etc. -
D 51 ,D 531 ,D 532 . . . D 53X≥1 - The following examples demonstrate the present invention and its capability for use in manufacturing of different specification fabric.
- A denim stretch fabric,
construction 3/1 RHT, with 100% cotton Ne 10 in the warp and with Ne16 Stretch yarn in accordance with the present invention. The invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.5. We can see the sample had weight 11.8 oz/sq.yd. (after washed), good stretch (26.13%), good shrinkage (−7%) and growth (3.6%). - A denim stretch fabric,
construction 3/1 RHT, with 100% cotton Ne 8 in the warp and with Ne16 Stretch yarn in accordance with the present invention. The invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8. We can see the sample had weight 11.9 oz/sq.yd. (after washed), good stretch (36.26%), good shrinkage (−11%) and acceptable growth (4.9%). - A denim stretch fabric,
construction 3/1 RHT, with 100% cotton Ne10 slub in the warp and with Ne16 Stretch yarn in accordance with the present invention. The invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier with less pick, said 48. Both of the average draft is with 3.5. We can see the sample had weight 12 oz/sq.yd. (after washed) and resulted in high stretch (44.26%) and still have good shrinkage (−9%) and acceptable growth (4.8%). - A denim stretch fabric,
construction 3/1 RHT, with 100% cotton Ne10 slub in the warp and with 70% Polyester/30% Rayon Ne16 Stretch yarn in accordance with the present Invention. The invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8. We can see the sample had weight 11.8 oz/sq.yd. (after washed), good stretch (31.33%), good shrinkage (−8%) and growth (3.2%). - A denim stretch fabric,
construction 3/1 RHT, with 100% cotton Ne14 slub in the warp and with 70% Polyester/30% Rayon Ne16 Stretch yarn in accordance with the present Invention. The invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8. We can see the sample had weight 11.8 oz/sq.yd. (after washed) and have a higher stretch (65.2%) at good shrinkage (−13%) and acceptable growth (6.73%). - A denim stretch fabric,
construction 3/1 RHT, with 50% cotton/50% Rayon Ne12 slub in the warp and with 70% Polyester/30% Rayon Ne16 Stretch yarn in accordance with the present Invention. The invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8. We can see the sample had weight 12.2 oz/sq.yd. (after washed), good stretch (34.4%), good shrinkage (−9%) and growth (3.06%). - A two ways denim stretch fabric,
construction 3/1 RHT, with 100% cotton Ne10 slub core 40D Spandex in the warp and with 70% Polyester/30% Rayon Ne16 Stretch yarn in accordance with the present Invention. The invention in the weft yarn is with cotton fibrous sheath and core with two 40D denier. Both of the average draft is with 3.8. We can see the sample had weight 13.5 oz/sq.yd. (after washed), good warp/weft stretch (14.13%/31.33%), good warp/weft shrinkage (−13%/−8%) and acceptable growth (2.93%/4.8%). - A denim stretch fabric,
construction 3/1 RHT, with 91% cotton/9% Rubber Ne14 slub in the warp and with 74% cotton/26% rubber Ne10 Stretch yarn in accordance with the present invention. The invention in the weft yarn is with cotton fibrous sheath and core with two rubber threads. Both of the average draft is with 3.2. We can see the sample had weight 13 oz/sq.yd. (after washed), good stretch (55.4%), good shrinkage (−9%) and growth (5%). - The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (14)
1. A ring spun stretch yarn comprising at least two elastomeric filaments with at least two different mean drafts, wherein the mean draft on individual filament is varied and two fibrous sheath of at least one staple fiber, and wherein the elastomeric filaments have a denier from 20 to 140 and said the fibrous sheath has an English cotton yarn count Ne from 4 to 60.
2. The stretch yarn of claim 1 , wherein said fibrous sheath comprises natural or synthetic staple fibers, cotton, polyester, rayon, wool, nylon, acrylic or combination thereof.
3. The stretch yarn of claim 1 , wherein the mean draft of the elastomeric filament is from 1.05 to 5.
4. The stretch yarn of claim 1 , wherein the mean draft is calculated by individual actual draft/time along that elastomeric filament.
5. The stretch yarn of claim 1 , wherein the draft/time of the elastomeric filament is controlled by electronic but not limited.
6. The stretch yarn of claim 1 , wherein draft on individual filament is varied in the range from ±50% of the mean draft, but not limited to this range.
7. The stretch yarn of claim 1 , wherein the elastomeric filament is spandex/elastane/elastomer but not limited.
8. The stretch yarn of claim 1 , wherein the elastomeric filament can be at least one type material.
9. The stretch yarn of claim 1 , wherein the fibrous sheath can be natural fibers, regenerated fibers, synthetic fibers and a combination thereof.
10. The stretch yarn of claim 1 , wherein the stretch yarn can be used in producing slub yarn/normal yarn which can get some special fancy effect.
11. A woven fabric comprising the stretch yarn of claim 1 in warp or filling or both.
12. The woven fabric of claim 11 , wherein the fabric is denim or piece dyed.
13. A knitted fabric comprising the stretch yarn of claim 1 .
14. A sweater comprising the stretch yarn of claim 1 .
Applications Claiming Priority (3)
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HK19131094A HK30008630A2 (en) | 2019-10-16 | 2019-10-16 | |
HK19131094.5 | 2019-10-16 | ||
PCT/CN2020/119868 WO2021073442A1 (en) | 2019-10-16 | 2020-10-08 | Method of industrial producing elastomeric yarn and fabric thereof |
Publications (1)
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US20220034005A1 true US20220034005A1 (en) | 2022-02-03 |
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ID=75538411
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US17/309,413 Abandoned US20220034005A1 (en) | 2019-10-16 | 2020-10-08 | Method of Industrial Producing Elastomeric Yarn and Fabric thereof |
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US (1) | US20220034005A1 (en) |
EP (1) | EP3906332A4 (en) |
CN (1) | CN113068405A (en) |
HK (1) | HK30008630A2 (en) |
WO (1) | WO2021073442A1 (en) |
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HK30008630A2 (en) * | 2019-10-16 | 2020-06-12 | ||
CN113403721A (en) * | 2021-07-22 | 2021-09-17 | 绍兴市柯桥区东纺纺织产业创新研究院 | Variable-elasticity conductive yarn and preparation method thereof |
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- 2020-10-08 US US17/309,413 patent/US20220034005A1/en not_active Abandoned
- 2020-10-08 CN CN202080005809.7A patent/CN113068405A/en active Pending
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Also Published As
Publication number | Publication date |
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WO2021073442A1 (en) | 2021-04-22 |
CN113068405A (en) | 2021-07-02 |
EP3906332A4 (en) | 2022-03-23 |
EP3906332A1 (en) | 2021-11-10 |
HK30008630A2 (en) | 2020-06-12 |
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