CN114150410A - Full dull spandex covering yarn - Google Patents
Full dull spandex covering yarn Download PDFInfo
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- CN114150410A CN114150410A CN202111244964.7A CN202111244964A CN114150410A CN 114150410 A CN114150410 A CN 114150410A CN 202111244964 A CN202111244964 A CN 202111244964A CN 114150410 A CN114150410 A CN 114150410A
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- Prior art keywords
- spandex
- core
- yarn
- dull
- full
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Links
- 229920002334 Spandex Polymers 0.000 title claims abstract description 82
- 239000004759 spandex Substances 0.000 title claims abstract description 82
- 238000002844 melting Methods 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000009987 spinning Methods 0.000 claims abstract description 5
- 229920000728 polyester Polymers 0.000 claims description 17
- 239000004677 Nylon Substances 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 229920001778 nylon Polymers 0.000 claims description 8
- 229920002292 Nylon 6 Polymers 0.000 claims description 5
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000004744 fabric Substances 0.000 abstract description 6
- 238000005253 cladding Methods 0.000 abstract 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 7
- 229920000570 polyether Polymers 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000004814 polyurethane Substances 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 5
- 239000006224 matting agent Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 229920006052 Chinlon® Polymers 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 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
- D02G3/36—Cored or coated yarns or threads
-
- 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
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
-
- 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
- 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
- D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
- D02G3/402—Yarns in which fibres are united by adhesives; Impregnated yarns or threads the adhesive being one component of the yarn, i.e. thermoplastic yarn
-
- 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
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
-
- 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]
-
- 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
- D10B2331/10—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyurethanes
Abstract
The invention discloses a full-dull spandex core-spun yarn, which is prepared by the following steps: the prepared full-dull spandex comprises a core part and a skin part, wherein the skin part is low-melting spandex and is uniformly distributed with a delustering agent; spinning the core-spun yarn: the core-spun yarn comprises a core yarn and a coating yarn, wherein the coating yarn is the full-dull spandex prepared in the previous step; grid-connected bonding: carrying out grid-connected bonding on the core-spun yarn prepared in the last step through a network nozzle; winding: the full-dull spandex core-spun yarn is rolled by the core-spun yarn subjected to grid-connected bonding, the cladding yarn is made of spandex filaments, and the good elastic recovery rate of the spandex filaments can be utilized, so that the prepared fabric is not easy to leave creases, the added value of the product can be improved, and the prepared fabric has good hand feeling and wearing comfort.
Description
Technical Field
The invention relates to the technical field of core-spun yarns, in particular to a full-dull spandex core-spun yarn.
Background
The existing elastic fabric is usually woven by adopting spandex core-spun yarns, and because the used spandex core-spun yarns are generally elastic yarns which are dared to be beaten by adopting filament yarns or short fiber yarns to coat naked spandex filaments in an extension state in a spiral mode, the spandex core-spun yarns have good elastic resilience and are widely applied to clothes, particularly the field of elastic clothes. Because the outer layer of the elastic garment is made of filament or spun yarn with poor elastic recovery, the prepared elastic garment still has obvious crease after being used for many times. How to reduce the problem of the scratch of the elastic clothes after being used for many times becomes the problem to be solved.
Disclosure of Invention
The invention aims to provide a full-dull spandex core-spun yarn, which adopts spandex filaments as the covering yarn and can utilize the elastic recovery property of the spandex filaments, so that the prepared fabric has good recovery performance and is not easy to leave creases.
In order to solve the technical problem, the invention aims to realize that:
the invention relates to a full-dull spandex core-spun yarn which is prepared by the following steps:
s1, preparing full-dull spandex: the prepared full-dull spandex comprises a core part and a skin part, wherein the core part uses spandex with the softening temperature of 190 ℃, the skin part is low-melting-point spandex, the melting range of the low-melting-point spandex is 90-125 ℃, and a dulling agent is uniformly distributed in the skin part;
s2, spinning of core-spun yarns: the core-spun yarn comprises a core yarn and a coating yarn, wherein the core yarn is a nylon filament and/or a polyester filament, and the coating yarn 12 is full-dull spandex prepared in the previous step; in the step, the overfeed rate of spandex is 20-30%;
s3, grid-connected bonding: carrying out grid-connected bonding on the core-spun yarn prepared in the last step through a network nozzle; in the step, hot air with the temperature of 90-130 ℃ is sprayed out of the network nozzle to bond the covering yarn formed by spandex and the core yarn;
s4, winding: and winding the core-spun yarn subjected to grid-connected bonding, wherein the tension during winding is 0.5-0.55 cN/D.
On the basis of the above scheme and as a preferable scheme of the scheme: the nozzle comprises an air inlet, a fiber mixing fiber channel and an air outlet; the mixed fiber yarn channel is communicated with the air inlet and the air outlet; the combined filament yarn channel is composed of a first curve side and a second curve side.
On the basis of the above scheme and as a preferable scheme of the scheme: the first curved side 16 and the second curved side are both parabolic.
On the basis of the above scheme and as a preferable scheme of the scheme: the first curved edge 16 and the second curved edge have a focus at the same position and the core spun yarn passes through the focus when the grid-tie bonding is performed.
On the basis of the above scheme and as a preferable scheme of the scheme: the polyester filament yarn is low-melting point polyester FDY with the temperature of 50-100D/24-36F, and the nylon filament yarn is low-melting point nylon 6 multifilament with the temperature of 35-60D/48-96F.
The invention has the beneficial effects that: according to the full-dull spandex core-spun yarn, the covered yarn is made of spandex filaments, and the good elastic recovery rate of the spandex filaments can be utilized, so that the prepared fabric is not easy to leave creases, the added value of products can be increased, and the prepared fabric has good hand feeling and wearing comfort.
Drawings
FIG. 1 is a schematic structural view of a full dull spandex core-spun yarn according to the present invention;
FIG. 2 is a schematic structural diagram of a full-dull spandex filament according to the present invention;
fig. 3 is a schematic diagram of the structure of a network nozzle used in the present invention.
The designations in the figures illustrate the following: 10-a point of attachment; 11-core filament; 12-coating silk; 13-an air inlet; 14-combined filament yarn channels; 15-air outlet; 16-a first curvilinear edge; 17-a second curvilinear edge; 111-dermatome; 112-core.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example one
The present embodiment will be described in detail with reference to fig. 1 and 2 and the seal. The full dull spandex covering yarn related to the embodiment is prepared by the following steps:
s1, preparing full-dull spandex: the prepared full-dull spandex comprises a core part 112 and a sheath part 111, wherein the core part 112 uses spandex with the softening temperature of 190 ℃, the sheath part 111 uses spandex with a low melting point, the melting range of the spandex with the low melting point is 90-125 ℃, and matting agents are uniformly distributed in the sheath part. The matting agent used was nanoscale titanium dioxide.
Because the addition of the flatting agent has certain influence on the repeated stretching recovery performance of the spandex filament after multiple fixed elongations, the conventional spandex is prepared by taking polyurethane as a raw material and is polyester polyurethane, and in order to reduce the influence of the added flatting agent on the performance of the spandex, polyether polyurethane with the same dosage as the flatting agent is added into the leather part, namely, the leather part contains 2 wt% of the flatting agent and polyether polyurethane with the same content, and the balance is the polyester polyurethane. And the core is polyester polyurethane. In this embodiment, the skin portion and the core portion are concentric circles, and the area ratio of the skin portion to the core portion is 2: 5.
repeated tensile property tests were performed on spandex filaments without polyether urethane added to the sheath portion and spandex filaments with polyether urethane added to the sheath portion. The test is carried out according to the standard FZ/T5007-1994 spandex filament elasticity test method. The spandex filaments were tested at different constant elongations (300%, 400% and 500%) and at 20, 30 and 40 draw times, respectively.
The test results for spandex filaments without polyether urethane added to the sheath portion were as follows:
the test results for spandex filaments with polyether urethane added to the sheath portion were as follows:
from the above test results, it can be seen that the spandex filament added with the polyether urethane has better repeated stretch recovery performance at a constant elongation.
S2, spinning of core-spun yarns: the core-spun yarn comprises a core yarn 11 and a coating yarn 12, wherein the core yarn 11 is a nylon filament and/or a polyester filament, and the coating yarn 12 is full-dull spandex prepared in the previous step; in this step, the overfeed rate of spandex was 20%.
The nylon filament is selected in the embodiment and has better hand feeling. The nylon filament is 35-60D/48-96F low-melting-point nylon 6 multifilament, specifically 60D/96F.
S3, grid-connected bonding: and (3) carrying out grid-connected bonding on the core-spun yarn prepared in the last step through a network nozzle to form the full-dull spandex core-spun yarn. In the step, hot air with the temperature of 90 ℃ is sprayed from the network nozzle, the surface of the low-melting point polyamide-6 composite or low-melting point polyester FDY is heated, and the surface is bonded with spandex. The sprayed hot air acts on the surface of the fiber within a short time, only the surface of the fiber is affected, the spandex filament can be bonded with the low-melting-point terylene and the low-melting-point chinlon, and the influence of breakage and the like on the whole filament can be avoided. The overall influence of hot air on the spandex covered yarn can be controlled through the running speed of the spandex composite covered yarn and the working time of the network nozzle.
Further, the nozzle used in this step includes an air inlet 13, a combined filament yarn channel 14, and an air outlet 15; the combined filament yarn channel 14 is communicated with the air inlet 13 and the air outlet 15; the combined filament channel 14 is composed of a first curved side 16 and a second curved side 17.
Further, the first curved side 16 and the second curved side 17 are both parabolic, and the specific shape is equal to y ═ x2The same shape as (2) may be used, or the curve shape of the conversion function may be used.
Further, the focal points of the first curved side 16 and the second curved side 17 are located at the same position, and the yarn passes through the focal points when the grid connection is performed.
The first curved edge 16 and the second curved edge 17 have parabolic shapes, the first curved edge 16 can enable airflows in all directions to converge towards the focal position of the parabola, and during production, the spandex composite covered yarn is located at the focal position of the parabola, so that more airflows are reflected and then act on the spandex composite covered yarn for the second time, and the spandex composite covered yarn is reinforced more firmly. The second curved edge 17 can reflect the high-temperature airflow reflected by the first curved edge 16 again, and can act on the spandex composite covered yarn for multiple times.
S4, winding: the core spun yarn subjected to the combination bonding was wound up with a tension of 0.5 cN/D.
Example two
The full dull spandex covering yarn related to the embodiment is prepared by the following steps:
s1, preparing full-dull spandex: the prepared full-dull spandex comprises a core part and a skin part, wherein the spandex with the softening temperature of 190 ℃ is used in the core part, the spandex with the low melting point in the skin part has the melting range of 90-125 ℃, and matting agents are uniformly distributed in the skin part.
S2, spinning of core-spun yarns: the core-spun yarn comprises a core yarn 11 and a coating yarn 12, wherein the core yarn 11 is a nylon filament and/or a polyester filament, and the coating yarn 12 is full-dull spandex prepared in the previous step; in this step, the overfeed rate of spandex was 30%.
The polyester filament yarns are selected in the embodiment, so that the polyester filament yarns have better strength. The polyester filament yarn is 50-100D/24-36F low-melting point polyester FDY, specifically 50D/24F
S3, grid-connected bonding: and (3) carrying out grid-connected bonding on the core-spun yarn prepared in the last step through a network nozzle to form the full-dull spandex core-spun yarn. In the step, hot air with the temperature of 130 ℃ is sprayed from a network nozzle, and the low-melting point polyamide-6 composite and low-melting point polyester FDY surface is heated and bonded with spandex. The spandex filament 12 used in step S4 is a low-melting spandex having a melting range of 90 to 120 ℃.
S4, winding: the core spun yarn subjected to the combination bonding was wound up with a tension of 0.55 cN/D.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. The full-dull spandex core-spun yarn is characterized by being prepared by the following steps:
s1, preparing full-dull spandex: the prepared full-dull spandex comprises a core part and a skin part, wherein the core part uses spandex with the softening temperature of 190 ℃, the skin part is low-melting-point spandex, the melting range of the low-melting-point spandex is 90-125 ℃, and a dulling agent is uniformly distributed in the skin part;
s2, spinning of core-spun yarns: the core-spun yarn comprises a core yarn (11) and a coating yarn (12), wherein the core yarn (11) is a nylon filament and/or a polyester filament, and the coating yarn (12) is full-dull spandex prepared in the previous step; in the step, the overfeed rate of spandex is 20-30%;
s3, grid-connected bonding: carrying out grid-connected bonding on the core-spun yarn prepared in the last step through a network nozzle; in the step, hot air with the temperature of 90-130 ℃ is sprayed out of the network nozzle to bond the covering yarn formed by spandex and the core yarn;
s4, winding: and winding the core-spun yarn subjected to grid-connected bonding, wherein the tension during winding is 0.5-0.55 cN/D.
2. A full dull spandex core-spun yarn according to claim 1, wherein the nozzle includes an air inlet (13), a combined filament channel (14) and an air outlet (15); the combined filament yarn channel (14) is communicated with the air inlet (13) and the air outlet (15); the combined filament channel (14) is composed of a first curved side (16) and a second curved side (17).
3. A full dull spandex core-spun yarn according to claim 2, wherein the first curved side (16) and the second curved side (17) are both parabolic.
4. A full dull spandex core-spun yarn according to claim 3, wherein the focuses of the first curved side (16) and the second curved side (17) are located at the same position, and the core-spun yarn passes through the focuses when performing the grid-tie bonding.
5. The full-dull spandex core-spun yarn according to claim 1, wherein the polyester filament yarn is a low-melting-point polyester FDY of 50-100D/24-36F, and the nylon filament yarn is a low-melting-point nylon-6 multifilament of 35-60D/48-96F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111244964.7A CN114150410A (en) | 2021-10-26 | 2021-10-26 | Full dull spandex covering yarn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111244964.7A CN114150410A (en) | 2021-10-26 | 2021-10-26 | Full dull spandex covering yarn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114150410A true CN114150410A (en) | 2022-03-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111244964.7A Pending CN114150410A (en) | 2021-10-26 | 2021-10-26 | Full dull spandex covering yarn |
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| Country | Link |
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| CN (1) | CN114150410A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163727A (en) * | 1982-03-16 | 1983-09-28 | Kanebo Ltd | Production of polyurethane conjugate elastic yarn |
| US20030005997A1 (en) * | 1996-12-31 | 2003-01-09 | Bruner Jeffrey W. | Composite elastomeric yarns |
| JP2003073945A (en) * | 2001-09-03 | 2003-03-12 | Scalar High Touch Kk | Covered yarn |
| WO2010113862A1 (en) * | 2009-03-31 | 2010-10-07 | グンゼ株式会社 | Core-sheath conjugate fiber and process for producing same |
| US20160122907A1 (en) * | 2013-05-29 | 2016-05-05 | Invista North America S.A.R.I. | Fusible bicomponent spandex |
| US20160160406A1 (en) * | 2014-05-29 | 2016-06-09 | Arun Agarwal | Production of high cotton number or low denier core spun yarn for weaving of reactive fabric and enhanced bedding |
| CN106222795A (en) * | 2008-10-17 | 2016-12-14 | 英威达技术有限公司 | Bicomponent spandex |
| CN108193340A (en) * | 2017-12-25 | 2018-06-22 | 连云港银飞纤维科技有限公司 | A kind of preparation method and applications for producing novel imitation leather elastic fabric wrap yarn |
| CN110552096A (en) * | 2019-09-06 | 2019-12-10 | 浙江大地蓝化纤有限公司 | One-step production process of high-strength high-shrinkage combined filament yarn |
| CN110760963A (en) * | 2019-09-25 | 2020-02-07 | 武汉纺织大学 | Method for changing fabric structure |
| WO2021096008A1 (en) * | 2019-11-14 | 2021-05-20 | 효성티앤씨 주식회사 | Composite elastic yarn, stretchable fabric, and method for manufacturing composite elastic yarn |
-
2021
- 2021-10-26 CN CN202111244964.7A patent/CN114150410A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163727A (en) * | 1982-03-16 | 1983-09-28 | Kanebo Ltd | Production of polyurethane conjugate elastic yarn |
| US20030005997A1 (en) * | 1996-12-31 | 2003-01-09 | Bruner Jeffrey W. | Composite elastomeric yarns |
| JP2003073945A (en) * | 2001-09-03 | 2003-03-12 | Scalar High Touch Kk | Covered yarn |
| CN106222795A (en) * | 2008-10-17 | 2016-12-14 | 英威达技术有限公司 | Bicomponent spandex |
| WO2010113862A1 (en) * | 2009-03-31 | 2010-10-07 | グンゼ株式会社 | Core-sheath conjugate fiber and process for producing same |
| US20160122907A1 (en) * | 2013-05-29 | 2016-05-05 | Invista North America S.A.R.I. | Fusible bicomponent spandex |
| US20160160406A1 (en) * | 2014-05-29 | 2016-06-09 | Arun Agarwal | Production of high cotton number or low denier core spun yarn for weaving of reactive fabric and enhanced bedding |
| CN108193340A (en) * | 2017-12-25 | 2018-06-22 | 连云港银飞纤维科技有限公司 | A kind of preparation method and applications for producing novel imitation leather elastic fabric wrap yarn |
| CN110552096A (en) * | 2019-09-06 | 2019-12-10 | 浙江大地蓝化纤有限公司 | One-step production process of high-strength high-shrinkage combined filament yarn |
| CN110760963A (en) * | 2019-09-25 | 2020-02-07 | 武汉纺织大学 | Method for changing fabric structure |
| WO2021096008A1 (en) * | 2019-11-14 | 2021-05-20 | 효성티앤씨 주식회사 | Composite elastic yarn, stretchable fabric, and method for manufacturing composite elastic yarn |
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