CN102517722B - Spun-dyed yarn produced by vortex spinning and process thereof - Google Patents
Spun-dyed yarn produced by vortex spinning and process thereof Download PDFInfo
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- 238000009987 spinning Methods 0.000 claims abstract description 71
- 239000000835 fiber Substances 0.000 claims abstract description 37
- 238000010792 warming Methods 0.000 claims description 38
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 21
- 229920000742 Cotton Polymers 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 239000000975 dye Substances 0.000 claims description 20
- 238000004043 dyeing Methods 0.000 claims description 18
- 238000007670 refining Methods 0.000 claims description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000012805 post-processing Methods 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 8
- 239000002738 chelating agent Substances 0.000 claims description 7
- 235000017550 sodium carbonate Nutrition 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 102000004020 Oxygenases Human genes 0.000 claims description 6
- 108090000417 Oxygenases Proteins 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 5
- 239000003599 detergent Substances 0.000 claims description 5
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- 238000007383 open-end spinning Methods 0.000 description 3
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- 239000004753 textile Substances 0.000 description 3
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Abstract
The invention discloses a spun-dyed yarn produced by vortex spinning and a process thereof, belonging to the technical field of spinning. According to the invention, short fibers with a certain proportion are colored by fibers to prepare colored fibers. The acquired colored fibers are mixed with the original white short fibers and the mixture is processed by the vortex spinning to acquire the spun-dyed yarn. The spun-dyed yarn prepared by the method disclosed by the invention has the advantages of stable quality, good quality, short process, fast delivery and low cost.
Description
Technical field:
This area relates to field of textiles, a kind of look spinning and technique thereof of producing with vortex spinning.
Explanation of nouns:
Dyed yarn: coloured yarn that openpore yarn is made by the method such as cheese dyeing, hank dyeing.
Look spinning: adopt a certain proportion of coloured cut staple, mix former white short fiber with RING SPINNING, walk coloured yarn of the technology spinnings such as ingot spins, open-end spinning.
Background technology:
In current yarn market, dyed yarn occupies compared with great share always, is widely used in knitting colour bar, woven grid striped cloth, the fields such as sweater.Along with the aspects such as the ability to react to market conditions (friendship phase) of market to dyed yarn, functional (multicomponent), cost, energy consumption require more and more highlyer, the dyed yarn of traditional poststaining that first spins can not adapt to the requirement in market gradually.Therefore, the appearance of look spinning, has made up this defect.Look spinning adopts first dyes the production technology of spinning after bulk fibre, its yarn can be realized multicomponent, part has solved because the problem of many chromatographys of yarn raw material components difficulty, because look spinning part short fiber is painted, dyeing cost and energy consumption are reduced, and make yarn present dim abundant visual effect, be suitable for that market is polynary, the development trend of function, trend.
At present, mainly adopt first and dye afterwards and spin for the technique of look Spinning process, first adopt loose stock dyeing technique to carry out painted, then adopt the spinning of the technique such as ring spinning or open-end spinning spinning quality.But above-mentioned technique exists following defect:
1, first adopt loose stock dyeing technique to carry out painted, then adopt ring spinning process look spinning, spinning process is more, and long flow path changes description very difficult, and cost is high.
2, adopt loose stock dyeing technique to carry out painted, then adopt open-end spinning to produce look spinning, dyed yarn product Boardy Feeling, the high grade yarn of production does not have cost advantage, can only be used for coarse yarn, and the market space is little.
At present, because the vortex spinning technology appearance time is quite limited, a large amount of production technologies supporting with it are all in the process of research and development and optimization.The manufacturer who has on a small quantity this kind equipment all throws in resource in the technique of the conventional openpore yarn of research and development, and for needing the manufacture of integrated chemical fiber, stock-dye, TEXTILE CHEMICALS, the exploration of the vortex spinning look spinning of the technology of multiple industries such as spinning, still in the starting stage, is mainly because face the oligomer in huge technical barrier, particularly production of chemical fibres, finish, antistatic problem; The loose fine static of dyeing, the homogeneity question of moisture content; The mutual entanglement problems of fiber after dyeing; Plurality of color fibre is with machine combing problem; The automatic creeling, automatic joint of spinning, the sensitivity problem of sensor to colored fibre etc. when repiece automatically, the problems referred to above all propose stern challenge to the normalization of producing.The present invention is based on the profound understanding to multiple industry Current situation of the manufacturing process, integrate modern textile science and technology, provide package solution to the production of vortex spinning look spinning.
Summary of the invention:
The object of the invention is by the improvement to Technology of Air Vortex Spinning, seek a kind of Tecnology of Air Vortex Spinning that adopts and produce look spinning, the look spinning of its production meets steady quality, product are of fine quality, flow process is short, and the friendship phase is fast, the requirement that cost is low, meet large-scale industrial production, improved the defect of traditional colour spinning.
The technical scheme that the present invention takes is as follows:
Adopt vortex spinning to produce a technique for look spinning, it is characterized in that comprising the following steps: a certain proportion of bulk fibre is made to colored fibre through stock-dye, prepare quality spinning through fore-spinning, Tecnology of Air Vortex Spinning after mixing former white fiber.
Further:
Described bulk fibre can be any one or a few of natural fabric or chemical short fiber.
Described chemical short fiber must not contain oligomer, and oil content is below 1%.
Described stock-dye technique is dyeing process of cotton fiber, comprise: at 30 DEG C of pre-treatments, add hydrogen peroxide, stabilizing agent, refining agent, caustic soda, hydrogen peroxide 2-10g/l, stabilizing agent 0.1-0.3 g/l, refining agent 1-3 g/l, caustic soda 1-5 g/l, is warming up to 110 DEG C with 3 DEG C/min of speed, is incubated 30 minutes.Refining: add at 45 DEG C except oxygenase, acetic acid, except oxygenase 0.1-0.5g/l, acetic acid 0.5-1.5 g/l, is warming up to 60 DEG C, is incubated 15 minutes.Dyeing: add glauber salt 5-80 g/l at 40 DEG C, dyestuff 0.2-8 %(owf), chelating agent 0.3-1 g/l, soda ash 2-10 g/l, is then warming up to 60 DEG C with 1 DEG C/min of speed, is incubated 60 minutes.Clean: at 40 DEG C, add detergent 2-5 g/l, acetic acid 0.5-1.5 g/l, is then warming up to 80 DEG C insulation operation 15 minutes.Fixation: add color-fixing agent 0.5-4 g/l at 30 DEG C, be warming up to 45 DEG C, insulation operation 15 minutes.Post processing: add softener 1-5 g/l at 30 DEG C, antistatic additive 1-3 g/l, is warming up to 45 DEG C, insulation operation 15 minutes.
Described stock-dye technique is viscose fiber staining technique, comprising: refining: at 35 DEG C, add refining agent, chelating agent, and refining agent 1-3g/l, chelating agent 0.5-1 g/l, is warming up to 50 DEG C, is incubated 5 minutes.Dyeing: add glauber salt 20-85 g/l at 45 DEG C, dyestuff 0.5-8 %(owf), soda ash 2-10 g/l, is then warming up to 60 DEG C with 1 DEG C/min of speed, adds at twice soda ash, and each 2-10 g/l, is incubated 60 minutes.Clean: at 45 DEG C, add detergent 2-10 g/l, acetic acid 0.5-1 g/l, is then warming up to 80 DEG C insulation operation 25 minutes.Fixation: add color-fixing agent 1-4 g/l at 30 DEG C, be warming up to 45 DEG C, insulation operation 20 minutes.Post processing: add softener 1-5 g/l at 30 DEG C, antistatic additive 1-4 g/l, is warming up to 45 DEG C, insulation operation 15 minutes.
Described stock-dye technique is polyster fibre dyeing technique, comprise: dyeing: add degreaser 1-3 g/l at 45 DEG C, dyestuff 0.5-8 %(owf), levelling agent 1-2.5 g/l, then be warming up to 110 DEG C with 1-3 DEG C/min of speed, be warming up to 130 DEG C with 1 DEG C/min of speed again, be incubated 50 minutes.Clean: powder 2 g/l that take a policy at 45 DEG C, caustic soda 2 g/l, are then warming up to 90 DEG C, insulation operation 15 minutes.Fixation: add color-fixing agent 1-4 g/l at 30 DEG C, be warming up to 45 DEG C, insulation operation 20 minutes.Post processing: add softener 1-5 g/l at 30 DEG C, antistatic additive 1-4 g/l, is warming up to 45 DEG C, insulation operation 20 minutes.
Described fore-spinning comprises premix, blowing, comb and parallel cotton fibers prior to spinning, drafting, wherein:
Premix: look spins raw material before formal production, need mix colours and be pre-mixed according to the requirement of client's product and color.This mixing comprises the mixing of one or more raw materials and one or more coloured light short fibers.
Blowing: adopt twice mixed cotton, flexible shredding, reduces Beater Speed, disk Beater Speed 740R/MIN, hired roughneck stretches out rib 1-1.5MM, and opener Beater Speed 450R/MIN is totally-enclosed under dirt rod.
Comb and parallel cotton fibers prior to spinning: control licker-in speed, cylinder speed, doffer speed.The speed ratio of cylinder and licker-in is not less than 2.0, and the carded sliver weight of output is no more than 20 grams/5M.
Drafting: because the feature of vortex spinning has determined having relatively high expectations to straightening of fibers degree and the uniformity, the present invention adopts three road mixing in doubling step, adopt head and stretch in advance, two and stretch by force, three and take into account the dry process route of last drafting, can keep so the dry semi-finished product of bar of strip to have basicly good.Head and and and 6 of radicals, 1.7 times of rear road drawing-offs; Two and and and 8 of radicals, rear road drawing-off 1.35, three also and 6 of radicals, rear road drawing-off 1.35.
Described spinning process adopts the VORTEX861 vortex flow spinner of Murata Machine Co., Ltd.Tecnology of Air Vortex Spinning parameter, (spinning as example taking 32S TR65/35 look) specific as follows:
Spinning speed 370m/min;
Total draft multiple 218
Dominant draft multiple 30
Feeding is than 0.96
Curling ratio 1.01
BR inception rate 100%
Tension roller peripheral speed/transporting velocity is than 1.03
The angle of traversing 14deg.
Operation principle of the present invention and beneficial effect are as follows:
The present invention improves by following, finally realize and produced the spinning of high-quality look with Tecnology of Air Vortex Spinning: in 1, loose stock dyeing technique, adopt without oligomer, without static, without finish or low finish fibrous raw material, when while reasonable disposition loose stock dyeing technique 2, bulk fibre mixture, carry out antistatic control, the raw material of mixture need be guaranteed without static, low finish.3, in fore-spinning, set up mixed cotton operation one time, control opener speed simultaneously; Adopt three road mixing in doubling step, and control humiture and drafting speed.4, reasonable disposition Tecnology of Air Vortex Spinning parameter, sets up dyed yarn sensor.The panchromatic spinning quality of vortex spinning of producing is stable, and product are of fine quality, and flow process is short, and the friendship phase is fast, and cost advantage is obvious, has space, large market (yarn advantage and economic implications referring to table 1-table 2, and shown in Fig. 1-Fig. 4).
Table 1, traditional dyed yarn and spinning of vortex spinning look are compared.
Table 2, traditional look spinning and spinning of vortex spinning look are compared
Brief description of the drawings:
Fig. 1 is the filoplume state comparison diagram of the look spinning yarn prepared of traditional dyeing yarn and the present invention;
The filoplume state comparison diagram of Fig. 2 look spinning yarn that to be traditional colour spinning prepare with the present invention;
Fig. 3 is traditional colour spinning and the anti-fluffing and anti-pilling comparison diagram of the look spinning yarn of preparing with the present invention;
Fig. 4 is traditional colour spinning and the moisture pick-up properties comparison diagram of the look spinning yarn of preparing with the present invention.
Detailed description of the invention:
A kind of technique that adopts vortex spinning to produce look spinning provided by the invention, its technological process is as follows: raw material is selected---loose stock dyeing---front spinning---air vortex spinning---finished product.
1, raw material is selected: commercially available cotton fiber, terylene, acrylic fibers, viscose fibrid all can adopt.For convenience of follow-up spinning process and the more excellent properties of product of acquisition.
Preferably adopt the raw material of thin dawn or super fine denier, wherein: chemical fibre raw material is as terylene, and acrylic fibers, viscose fibrid fineness are below 1.33DTEX, and length is 38MM; Cotton fiber length is more than medium staple cotton, and common medium staple cotton can be selected big-length, low fineness, fiber that monofilament strength is high.Fiber preferably adopts the raw material without finish and low finish (finish ratio≤1%), without finish the best.
2, loose stock dyeing:
Various bulk fibres are carried out respectively to loose stock dyeing, wherein: chemical fibre fibrid needs the processing of deoiling before dyeing, to ensure the dye-uptake of stock-dye, uniformity.Cotton fiber need be processed cotton wax, after having dyeed, carries out in proportion mixture, and when mixture, raw material need be guaranteed without static, and mixed ratio requires to select according to product requirement and color.
The present invention keeps the control of static in production process and produces dry the stablizing of bar, for follow-up spinning process provides good condition.Optimize existing loose stock dyeing technique, various stock-dye technique is as follows:
2.1.------dyeing---is cleaned---fixation---post processing to cotton fiber dyeing: pre-treatment in refining.
Pre-treatment process formula: at 30 DEG C, add hydrogen peroxide, stabilizing agent, refining agent, caustic soda, hydrogen peroxide 2-10g/l, stabilizing agent 0.1-0.3 g/l, refining agent 1-3 g/l, caustic soda 1-5 g/l, is warming up to 110 DEG C with 3 DEG C/min of speed, is incubated 30 minutes.
Refining: add at 45 DEG C except oxygenase, acetic acid, except oxygenase 0.1-0.5g/l, acetic acid 0.5-1.5 g/l, is warming up to 60 DEG C, is incubated 15 minutes.
Dyeing: add glauber salt 5-80 g/l at 40 DEG C, dyestuff 0.2-8 %(owf), chelating agent 0.3-1 g/l, soda ash 2-10 g/l, is then warming up to 60 DEG C with 1 DEG C/min of speed, is incubated 60 minutes.
Clean: at 40 DEG C, add detergent 2-5 g/l, acetic acid 0.5-1.5 g/l, is then warming up to 80 DEG C insulation operation 15 minutes.
Fixation: add color-fixing agent 0.5-4 g/l at 30 DEG C, be warming up to 45 DEG C, insulation operation 15 minutes.
Post processing: add softener 1-5 g/l at 30 DEG C, antistatic additive 1-3 g/l, is warming up to 45 DEG C, insulation operation 15 minutes.
2.2.---dyeing---is cleaned---fixation---post processing to viscose fiber staining: refining.
Refining: at 35 DEG C, add refining agent, chelating agent, refining agent 1-3g/l, chelating agent 0.5-1 g/l, is warming up to 50 DEG C, is incubated 5 minutes.
Dyeing: add glauber salt 20-85 g/l at 45 DEG C, dyestuff 0.5-8 %(owf), soda ash 2-10 g/l, is then warming up to 60 DEG C with 1 DEG C/min of speed, adds at twice soda ash, and each 2-10 g/l, is incubated 60 minutes.
Clean: at 45 DEG C, add detergent 2-10 g/l, acetic acid 0.5-1 g/l, is then warming up to 80 DEG C insulation operation 25 minutes.
Fixation: add color-fixing agent 1-4 g/l at 30 DEG C, be warming up to 45 DEG C, insulation operation 20 minutes.
Post processing: add softener 1-5 g/l at 30 DEG C, antistatic additive 1-4 g/l, is warming up to 45 DEG C, insulation operation 15 minutes.
2.3. polyster fibre dyeing: dyeing---cleaning---post processing.
Dyeing: add degreaser 1-3 g/l at 45 DEG C, dyestuff 0.5-8 %(owf), levelling agent 1-2.5 g/l, is then warming up to 110 DEG C with 1-3 DEG C/min of speed, then is warming up to 130 DEG C with 1 DEG C/min of speed, is incubated 50 minutes.
Clean: powder 2 g/l that take a policy at 45 DEG C, caustic soda 2 g/l, are then warming up to 90 DEG C, insulation operation 15 minutes.
Fixation: add color-fixing agent 1-4 g/l at 30 DEG C, be warming up to 45 DEG C, insulation operation 20 minutes.
Post processing: add softener 1-5 g/l at 30 DEG C, antistatic additive 1-4 g/l, is warming up to 45 DEG C, insulation operation 20 minutes.
In the present invention, the auxiliary agents such as stock-dye levelling agent used, softener, degreaser, antistatic additive are conventional auxiliary agent used in stock-dye.
3, front spinning: comprise the operations such as premix, blowing, comb and parallel cotton fibers prior to spinning, drafting.Produce panchromatic spinning, because performance after loose stock dyeing has a greater change, pliability reduces, and fiber tangles mutually, and frictional force increases, and the control in spinning process has compared with Important Relations with fibre property, so process route should adapt with the characteristic of fiber.
Premix: look spins raw material before formal production, need mix colours and be pre-mixed according to the requirement of client's product and color.This mixing comprises the mixing of one or more raw materials and one or more coloured light short fibers.
Blowing: adopt twice mixed cotton, flexible shredding, reduces Beater Speed, disk Beater Speed 740R/MIN, hired roughneck stretches out rib 1-1.5MM, and opener Beater Speed 450R/MIN is totally-enclosed under dirt rod.
Comb and parallel cotton fibers prior to spinning: control licker-in speed, cylinder speed, doffer speed.The speed ratio of cylinder and licker-in is not less than 2.0, and the carded sliver weight of output is no more than 20 grams/5M.Specifically as shown in table 4:
Table 4, carding process parameter.
Drafting: because the feature of vortex spinning has determined having relatively high expectations to straightening of fibers degree and the uniformity, the present invention adopts three road mixing in doubling step, adopt head and stretch in advance, two and stretch by force, three and take into account the dry process route of last drafting, can keep so the dry semi-finished product of bar of strip to have basicly good.Head and and and 6 of radicals, 1.7 times of rear road drawing-offs; Two and and and 8 of radicals, rear road drawing-off 1.35, three also and 6 of radicals, rear road drawing-off 1.35.
4, spinning: the present invention adopts the VORTEX861 vortex flow spinner of Murata Machine Co., Ltd.Because air vortex spinning is the critical process of look Spinning process, the maximum difficulty of look Spinning process is this.Therefore, Tecnology of Air Vortex Spinning dispose high requirement, (spinning as example taking 32S TR65/35 look) specific as follows:
Spinning speed 370m/min;
Total draft multiple 218
Dominant draft multiple 30
Feeding is than 0.96
Curling ratio 1.01
BR inception rate 100%
Tension roller peripheral speed/transporting velocity is than 1.03
The angle of traversing 14deg.
The present invention, by reasonable disposition Tecnology of Air Vortex Spinning parameter, comprises counter extensioin technique reasonable disposition.Meanwhile, owing to producing the requirement of look spinning, in vortex flow spinner, the sensor of the little machine of joint and carriage type doffer is purchased from Murata Co., Ltd..Turbine spinning process of the present invention is produced the object of look spinning, and the look of producing spinning, spins as example taking 32S TR65/35 look, and its performance is as follows:
Single thread fracture strength (cN/tex) 13.2
Strip dry uniformity variant coefficient (CV)/% 13.5
5/km of details (50%)
35/km of slubbing (+50%)
Cotton joint (+200%) 20/km.
Claims (2)
1. a technique of producing look spinning with vortex spinning, is characterized in that, comprises the following steps: a certain proportion of bulk fibre is made to colored fibre through stock-dye, mix former white short fiber and prepare quality spinning through fore-spinning, Tecnology of Air Vortex Spinning;
Described stock-dye technique is dyeing process of cotton fiber, comprise: pre-treatment: at 30 DEG C, add hydrogen peroxide, stabilizing agent, refining agent, caustic soda, hydrogen peroxide 2-10g/l, stabilizing agent 0.1-0.3 g/l, refining agent 1-3 g/l, caustic soda 1-5 g/l, is warming up to 110 DEG C with 3 DEG C/min of speed, is incubated 30 minutes; Refining: add at 45 DEG C except oxygenase, acetic acid, except oxygenase 0.1-0.5g/l, acetic acid 0.5-1.5 g/l, is warming up to 60 DEG C, is incubated 15 minutes; Dyeing: add glauber salt 5-80 g/l at 40 DEG C, dyestuff 0.2-8 %(owf), chelating agent 0.3-1 g/l, soda ash 2-10 g/l, is then warming up to 60 DEG C with 1 DEG C/min of speed, is incubated 60 minutes; Clean: at 40 DEG C, add detergent 2-5 g/l, acetic acid 0.5-1.5 g/l, is then warming up to 80 DEG C insulation operation 15 minutes; Fixation: add color-fixing agent 0.5-4 g/l at 30 DEG C, be warming up to 45 DEG C, insulation operation 15 minutes; Post processing: add softener 1-5 g/l at 30 DEG C, antistatic additive 1-3 g/l, is warming up to 45 DEG C, insulation operation 15 minutes.
2. a kind of technique of producing look spinning with vortex spinning according to claim 1, is characterized in that: described fore-spinning comprises premix, blowing, comb and parallel cotton fibers prior to spinning, drafting, wherein:
Premix: look spins raw material before formal production, need mix colours and be pre-mixed according to the requirement of client's product and color;
Blowing: adopt twice mixed cotton, flexible shredding, reduces Beater Speed, disk Beater Speed 740R/MIN, hired roughneck stretches out rib 1-1.5MM, and opener Beater Speed 450R/MIN is totally-enclosed under dirt rod;
Comb and parallel cotton fibers prior to spinning: control licker-in speed, cylinder speed, doffer speed, the speed ratio of cylinder and licker-in is not less than 2.0, and the carded sliver weight of output is no more than 20 grams/5M;
Drafting: adopt three road mixing in doubling step, head and and and 6 of radicals, 1.7 times of rear road drawing-offs; Two and and and 8 of radicals, rear road drawing-off 1.35, three also and 6 of radicals, rear road drawing-off 1.35.
3. a kind of technique of producing look spinning with vortex spinning according to claim 1, is characterized in that: described spinning process adopts the VORTEX861 vortex flow spinner of Murata Machine Co., Ltd; Tecnology of Air Vortex Spinning parameter:
Spinning speed 370m/min;
Total draft multiple 218
Dominant draft multiple 30
Feeding is than 0.96
Curling ratio 1.01
BR inception rate 100%
Tension roller peripheral speed/transporting velocity is than 1.03
The angle of traversing 14deg.
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| CN102995176B (en) * | 2012-11-15 | 2015-04-01 | 绍兴国周纺织新材料有限公司 | Air vortex spinning method of multi-component full-colored spun yarns |
| CN103541083B (en) * | 2013-10-28 | 2016-03-09 | 绍兴国周纺织新材料有限公司 | The processing technology of vortex spinning five colours yarn |
| CN103541082B (en) * | 2013-10-28 | 2016-05-04 | 绍兴国周针织科技有限公司 | The preparation method of the coloured hollow yarn of vortex spinning |
| CN105755657A (en) * | 2014-12-15 | 2016-07-13 | 东丽纤维研究所（中国）有限公司 | Knitting elastic fabric and production method and purposes |
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