CN106319654A - Polyamide-6 stretch yarns capable of being dyed by cationic dyestuff and production process of polyamide-6 stretch yarns - Google Patents
Polyamide-6 stretch yarns capable of being dyed by cationic dyestuff and production process of polyamide-6 stretch yarns Download PDFInfo
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- CN106319654A CN106319654A CN201510402434.9A CN201510402434A CN106319654A CN 106319654 A CN106319654 A CN 106319654A CN 201510402434 A CN201510402434 A CN 201510402434A CN 106319654 A CN106319654 A CN 106319654A
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Abstract
The invention relates polyamide-6 stretch yarns capable of being dyed by cationic dyestuff and a production process of the polyamide-6 stretch yarns. The polyamide-6 stretch yarns are characterized in that the polyamide-6 stretch yarns capable of being dyed by the cationic dyestuff are prepared through the steps of preparing polyamide-6 pre-oriented yarns capable of being dyed by the cationic dyestuff from polyamide-6 slices through a high-speed spinning method, and treating the polyamide-6 pre-oriented yarns through the high-speed spinning method to obtain the polyamide-6 stretch yarns capable of being dyed by the cationic dyestuff; the linear density of the polyamide-6 pre-oriented yarns capable of being dyed by the cationic dyestuff is 40dtex to 94dtex; the linear density of the polyamide-6 stretch yarns capable of being dyed by the cationic dyestuff is 33dtex to 77dtex; the production process provided by the invention is simple and efficient and the quality of a product is high; market requirements can be effectively met and a market prospect is wide.
Description
Technical field:
The invention belongs to field of textiles, be specifically related to a kind of cationic dye capable of dyeing chinlon 6 elastic filament and production technology thereof.
Background technology:
At present, in the fierce market competition, the functional product Development and Production of differential high added value has become the developing direction of chinlon 6 industry, invention novel product of only constantly bringing forth new ideas, and creates novel fabric for weaving mill, could win in the market competition.Cationic dye capable of dyeing chinlon 6 elastic filament is one of functional product of high added value, can increase value-added content of product, promotes profit on sales.
Summary of the invention:
It is an object of the invention to provide a kind of cationic dye capable of dyeing chinlon 6 elastic filament and production technology thereof, production technology is simple, efficient, and product quality is high, can effectively meet the market demand, have wide market prospect.
For achieving the above object, the present invention adopts the following technical scheme that
Subject cationic dye capable of dyeing chinlon 6 elastic filament, it is characterized in that: described cationic dye capable of dyeing chinlon 6 elastic filament is cut into slices by chinlon 6 and prepared cationic dye capable of dyeing chinlon 6 preoriented yarn at high speed spinning processes, then preoriented yarn carries out high speed spinning processes again and prepares described cationic dye capable of dyeing chinlon 6 elastic filament, the line density 40-94dtex of gained cationic dye capable of dyeing chinlon 6 preoriented yarn, the line density 33-77dtex of gained cationic dye capable of dyeing chinlon 6 elastic filament.
Further, the particular product performance parameters of above-mentioned cationic dye capable of dyeing chinlon 6 preoriented yarn: line density 40-94dtex, fracture strength >=3.8g/dtex, elongation at break 60-70%, internet pricing 2-8/rice, boiling water shrinkage 6.5-9.5%, oil content 0.43-0.5%, the uniformity≤1.20%, dyeing >=4.5 grades.
Further, the particular product performance parameters of above-mentioned cationic dye capable of dyeing chinlon 6 elastic filament: line density 33-77dtex, fracture strength >=4.4g/dtex, elongation at break 20-35%, internet pricing 50-150/rice, crimpness >=15%, curling degree of stability >=30%, boiling water shrinkage 4.5-8.5%, oil content 1.0-3.0%, dyeing 4.5 grades, cross section is circular.
The technique that the present invention produces cationic dye capable of dyeing chinlon 6 elastic filament, it is characterised in that: the production craft step of cationic dye capable of dyeing chinlon 6 preoriented yarn is as follows:
1) screw extruder is sent in the section needed for stored in feed bin and offer being produced；
2) section is carried out heating, melt, measure and produce predetermined pressure extrude from the head of screw rod through feed zone, compression section, metering section by screw extruder；
3) melt extruded enters into melt metering pump, melt metering pump then accurate measurement, carries high polymer molten continuously, and produces predetermined pressure, to ensure that spinning melt overcomes the resistance of filament spinning component, sprays from spinneret, forms as-spun fibre in atmosphere；
4) melt that melt metering pump is sent here by filament spinning component, through filtering off the removal of impurity, after mix homogeneously, is sprayed into filament bar from spinneret micropore equably, then forms, through quickly cooling and the slow cooling of cross air blasting cooling system, the fiber that crystallization orthodromic is good；
5) fiber after molding is carried out oiling operation through oil feeding system, oils strand oil feeding system homogeneous constant, reduces the frictional force of strand and silk road, increases the coherent of silk, eliminates electrostatic, promotes spinning efficiency, it is ensured that the working (machining) efficiency of subsequent handling；
6) fiber after oiling imports two draw-off godets, by the friction speed of two draw-off godets, strand is stretched and thermal finalization, thus change the internal structure of silk, silk is made to reach prescription, thereafter pre-network device is entered into, pre-network device makes strand tow under relatively low gas pressure be wound around mutually, and oil content evenly, increases the coherent of silk；
7) fiber after pre-network device processes makes strand be coiled into package the most regularly eventually through winding operation, forms cationic dye capable of dyeing chinlon 6 preoriented yarn.
Further, above-mentioned cationic dye capable of dyeing chinlon 6 preoriented yarn prepares the preparation method of described cationic dye capable of dyeing chinlon 6 elastic filament and sequentially passes through following step:
1) cationic dye capable of dyeing chinlon 6 preoriented yarn is through the transmission of wire leading pipe; and by after the cutting away of yarn cutter; drawn by a roller, grip strand together with roller by apron, make strand be stretched; claimed good surface of roller is not damaged by suction gun, billhook etc.; apron is intact, without groove mark and seamless with surface of roller pressing, and apron is without twining silk; stiff silk etc. otherwise easily occurs
2) only twisting with the fingers by twist arrester after roller, is fixed on strand hot tank top, plays the effect preventing strand yarn twist unevenness,
3) through hot tank, strand is heated after only twisting with the fingers, and fiber cooling of coiled structure after false twisting is fixed by coldplate,
4) kneading through scroll tube after cooling, the effect of scroll tube is to produce mechanical distortion stress, in order to deformation processing, it is the core of elasticizer；
5) then the tension force of warp tension device detects the traction with the second roller: on detection line, spinline tension fluctuation is monitored, and prevents exception tension force silk generation of weaving；
6) then through the purging of network nozzle, so that strand compressed air purging is formed network-like node, strand coherent is increased；
7) then through traction and the spy silk of yarn probe of the 3rd roller, when silk breaks end, information can be fed back to yarn cutter by yarn probe in time; silk is cut off by yarn cutter; roller, no longer for no longer having strand process in the whole the Silk Road of silk, prevents that roller twines silk, apron wheel twines silk, to protect equipment；
8) then through oil tanker oiling treatment, mainly to elastic filament plus suitable oil preparation, to improve the convergence of fiber, increase the flatness of fiber, improve the antistatic behaviour of fiber, the woven requirement in road after adaptation；
9) finally wind, allow the uniform regular package of strand become cationic dye capable of dyeing chinlon 6 elastic filament.
Further, above-mentioned cationic dye capable of dyeing chinlon 6 preoriented yarn main technologic parameters controls as follows:
Biphenyl temperature: 250-288 DEG C, melt temperature: 253-275 DEG C, spins pressure: 110-120kgf/ cm2, G.P rotating speed: 12.3-25.4rpm, O.P rotating speed: 11.5-18.9rpm, side-blown wind speed: 0.35-0.6m/s, draw ratio DR:1.03-1.05, spin speed: 4300-4600m/min.
Further, above-mentioned cationic dye capable of dyeing chinlon 6 elastic filament main technologic parameters controls as follows:
Ingot group: 1-4-1 ~ 1-8-1, heater temperature: 170-210 DEG C, draw ratio DR:1.25-1.30, D/Y compares: 1.5-2.5, over feed rate(OFR) :-4.2, oil tanker rotating speed: 0.23-0.60rpm, T2/T1:0.5-1.5, θ: 19 °-28 °.
The remarkable advantage of the present invention is: production technology of the present invention is simple, efficient, and product quality is high, can effectively meet the market demand, have wide market prospect.
Accompanying drawing illustrates:
Fig. 1 is the process chart of preoriented yarn of the present invention；
Fig. 2 is the process chart of elastic filament of the present invention.
Detailed description of the invention:
One, subject cationic dye capable of dyeing chinlon 6 preoriented yarn production process explanation:
1, feed bin: store and the section needed for production is provided；
2, screw extruder: section being carried out heats, melts, measures and produce predetermined pressure extrude from the head of screw rod through feed zone, compression section, metering section；
3, melt metering pump: accurate measurement, carry high polymer molten continuously, and produce predetermined pressure, to ensure that spinning melt overcomes the resistance of filament spinning component, spray from spinneret, form as-spun fibre in atmosphere；
4, filament spinning component: the melt that dosing pump is sent here, through filtering off the removal of impurity, after mix homogeneously, under certain shearing force and reasonable pressure set, from spinneret wire vent hole, it is sprayed into filament bar uniformly, then forms appropriate crystalline fiber through the effect of cross air blasting cooling；
5, cross air blasting system: the strand of spinneret orifice ejection is quickly cooled down and slow cooling forms the fiber that crystallization orthodromic is good；
6, oil feeding system: homogeneous constant strand is oiled: 1, reduce the frictional force of strand and silk road；2, the coherent of silk is increased；3, eliminate electrostatic, promote spinning efficiency, guarantee later process working (machining) efficiency；
7, draw-off godet: stretched strand and thermal finalization by the friction speed of draw-off godet, thus change the internal structure of silk, makes silk reach relevant prescription；
8, pre-network device: make the oil content of strand evenly, increases the coherent of silk；
9, winding: make strand be wound into spinning cake the most regularly and control the package of fixed length and weight.
Two, cationic dye capable of dyeing chinlon 6 elastic filament specification:
1, wire leading pipe: the effect of wire leading pipe is the transmitting effect realizing strand；
2, yarn cutter: receive broken yarn signal, abnormal signal cuts off strand and prevents strand from twining roller.
3, roller: grip strand together with roller by apron, makes strand be stretched.Claimed good surface of roller not by suction gun, 4, billhook etc. damage, apron is intact, without groove mark and seamless with surface of roller pressing, and apron, without twining silk, deadlock silk etc. otherwise easily occurs；
5, twist arrester: strand is fixed on hot tank top, plays the effect preventing strand yarn twist unevenness.Require twist arrester flawless, only 6, twister axle without twining silk, twist arrester is not skewed.
7, hot tank: heat strand, temperature is consistent with technological requirement, otherwise influences whether the curling irregularity of silk, uneven dyeing rate and thermal finalization effect, stiff silk and dyeing degradation also easily occurs；
8, coldplate: the effect of coldplate is to fix fiber coiled structure after false twisting, if cooling down the best (or uneven), then the coiled structure that fiber is formed at false-twisted process is the most uneven, and then affects dyeing uniformity, causes the degradation that dyes.
9, scroll tube: the effect of scroll tube is to produce mechanical distortion stress, in order to deformation processing.It is the core of elasticizer；
10, on-line tension device: spinline tension fluctuation monitoring on detection line, prevents abnormal tension force silk generation of weaving；
11, network nozzle: strand compressed air purging is formed network-like node, increases strand coherent；
12, yarn probe: during silk broken end, information can be fed back to yarn cutter by yarn probe in time, and silk is cut off by yarn cutter, roller, no longer for no longer having strand process in the whole the Silk Road of silk, prevents that roller twines silk, apron is taken turns and twined silk, to protect equipment；
13, oil tanker oils: the effect of oil tanker mainly adds suitable oil preparation to elastic filament, and its effect is the convergence improving fiber, increases the flatness of fiber, improves the antistatic behaviour of fiber, the woven requirement in road after adaptation
14, winding: allow the uniform regular package of strand become spinning cake DTY.
Cationic dye capable of dyeing chinlon 6 preoriented yarn finished product physical property:
| Line density | Fracture strength | Elongation at break | Internet pricing | Boiling water shrinkage | Oil content | The uniformity | Dyeing |
| 40-94dtex | ≥3.8g/dtex | 60-70% | 2-8/rice | 6.5-9.5% | 0.43-0.5% | ≤1.20% | >=4.5 grades |
Cationic dye capable of dyeing chinlon 6 elastic filament finished product physical property:
| Line density | Fracture strength | Elongation at break | Internet pricing | Crimpness | Curling degree of stability | Boiling water shrinkage | Oil content | Cross section | Dyeing |
| 33-77dtex | ≥4.4g/dtex | 20-35% | 50-150/rice | ≥15% | ≥30% | 4.5-8.5% | 1.0-3.0% | Circular | 4.5 level |
Cationic dye capable of dyeing chinlon 6 preoriented yarn technological condition:
Biphenyl temperature: 250-288 DEG C
Melt temperature: 253-275 DEG C
Spin pressure: 110-120kgf/cm2
G.P rotating speed: 12.3-25.4rpm
O.P rotating speed: 11.5-18.9rpm
Side-blown wind speed: 0.35-0.6m/s
Draw ratio DR:1.03-1.05
Spin speed: 4300-4600m/min
Cationic dye capable of dyeing chinlon 6 elastic filament technological condition:
Ingot group: 1-4-1 ~ 1-8-1
Heater temperature: 170-210 DEG C
Draw ratio DR:1.25-1.30
D/Y compares: 1.5-2.5
Over feed rate(OFR) :-4.2
Oil tanker rotating speed: 0.23-0.60rpm
T2/T1: 0.5-1.5
θ: 19°-28°
The difficult problem that the present invention captures:
1, cationic dye capable of dyeing chinlon 6 preoriented yarn is under conditions of high-speed spinning, and all kinds of process conditions are arranged to work as, and spins condition, product quality normally, and AA leads and is up to 96%；
2, the quality cut into slices by optimizing materials, solve that ingot interdigit winding tension variation during production cationic dye capable of dyeing chinlon 6 preoriented yarn is big, the variation of finished product elongation at break the most abnormal, promote cationic dye capable of dyeing chinlon 6 elastic filament finished product correspondence dyestuff and use single characteristic；
3, develop new oil preparation by improvement spinning oil, and be applied to this specification, improve the flatness of strand in spinning production process, follow-up woven spinnability, reduce cationic dye capable of dyeing chinlon 6 preoriented yarn, elastic filament, woven lousiness/filoplume rate.
4, by adjusting the levelness of up-coiler, perpendicularity, optimize preoriented yarn spinning cake shaping, improve outward appearance；
5, specific silk is led and oil nozzle, reduces the Silk Road friction, optimizes cationic dye capable of dyeing chinlon 6 preoriented yarn product quality;
6, improved link and the higher exception of the uniformity of cationic dye capable of dyeing chinlon 6 preoriented yarn by cooling and oil feeding system, solve the exception of cationic dye capable of dyeing chinlon 6 elastic filament product dyeing streak；
7, by each parameter stability systems such as on-line tension monitoring system Reasonable adjustment D/Y ratio, draw ratio DR, heater temperatures so that cationic dye capable of dyeing chinlon 6 elastic filament produces completely volume efficiency and is up to 89%, and appearance yield is up to 99%；
8, by developing new network nozzle cooperatively with porcelain piece company, the shortcoming solving nexus irregular fastness deficiency.
9, by integrating and adjust adding elater road, make that the Silk Road is more smooth and easy, tension force is more stable, solve the tension variation brought because equipment state is bad.
10、
By the upgrading to original silk rack, improve product pipe filling dyeing uniformity.
11、
By cooperating with elastic filament paper tube manufacturer, improve paper tube comprcssive strength, in order to the package requirement being suitable for each fiber number cationic dye capable of dyeing chinlon 6 elastic filament.
12、
By the type selecting of all kinds of scroll tube discs and cleaning cycle management and control are obtained more excellent physical index.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent and modification, all should belong to the covering scope of the present invention.
Claims (7)
1. cationic dye capable of dyeing chinlon 6 elastic filament, it is characterized in that: described cationic dye capable of dyeing chinlon 6 elastic filament is cut into slices by chinlon 6 and prepared cationic dye capable of dyeing chinlon 6 preoriented yarn at high speed spinning processes, then preoriented yarn carries out high speed spinning processes again and prepares described cationic dye capable of dyeing chinlon 6 elastic filament, the line density 40-94dtex of gained cationic dye capable of dyeing chinlon 6 preoriented yarn, the line density 33-77dtex of gained cationic dye capable of dyeing chinlon 6 elastic filament.
Cationic dye capable of dyeing chinlon 6 elastic filament the most according to claim 1, it is characterised in that: the particular product performance parameters of the modified preoriented yarn of chinlon 6: line density 40-94dtex, fracture strength >=3.8g/dtex, elongation at break 60-70%, internet pricing 2-8/rice, boiling water shrinkage 6.5-9.5%, oil content 0.43-0.5%, the uniformity≤1.20%, dyeing >=4.5 grades.
Cationic dye capable of dyeing chinlon 6 elastic filament the most according to claim 1, it is characterized in that: the particular product performance parameters of described cationic dye capable of dyeing chinlon 6 elastic filament: line density 33-77dtex, fracture strength >=4.4g/dtex, elongation at break 20-35%, internet pricing 50-150/rice, crimpness >=15%, curling degree of stability >=30%, boiling water shrinkage 4.5-8.5%, oil content 1.0-3.0%, dyeing 4.5 grades, cross section is circular.
4. the technique producing cationic dye capable of dyeing chinlon 6 elastic filament as claimed in claim 1, it is characterised in that: the production craft step of cationic dye capable of dyeing chinlon 6 preoriented yarn is as follows:
1) screw extruder is sent in the section needed for stored in feed bin and offer being produced；
2) section is carried out heating, melt, measure and produce predetermined pressure extrude from the head of screw rod through feed zone, compression section, metering section by screw extruder；
3) melt extruded enters into melt metering pump, melt metering pump then accurate measurement, carries high polymer molten continuously, and produces predetermined pressure, to ensure that spinning melt overcomes the resistance of filament spinning component, sprays from spinneret, forms as-spun fibre in atmosphere；
4) melt that melt metering pump is sent here by filament spinning component, through filtering off the removal of impurity, after mix homogeneously, is sprayed into filament bar from spinneret micropore equably, then forms, through quickly cooling and the slow cooling of cross air blasting cooling system, the fiber that crystallization orthodromic is good；
5) fiber after molding is carried out oiling operation through oil feeding system, oils strand oil feeding system homogeneous constant, reduces the frictional force of strand and silk road, increases the coherent of silk, eliminates electrostatic, promotes spinning efficiency, it is ensured that the working (machining) efficiency of subsequent handling；
6) fiber after oiling imports two draw-off godets, by the friction speed of two draw-off godets, strand is stretched and thermal finalization, thus change the internal structure of silk, silk is made to reach prescription, thereafter pre-network device is entered into, pre-network device makes strand tow under relatively low gas pressure be wound around mutually, and oil content evenly, increases the coherent of silk；
7) fiber after pre-network device processes makes strand be coiled into package the most regularly eventually through winding operation, forms cationic dye capable of dyeing chinlon 6 preoriented yarn.
The technique producing cationic dye capable of dyeing chinlon 6 elastic filament the most according to claim 4, it is characterised in that: described cationic dye capable of dyeing chinlon 6 preoriented yarn prepares the preparation method of described cationic dye capable of dyeing chinlon 6 elastic filament and sequentially passes through following step:
1) cationic dye capable of dyeing chinlon 6 preoriented yarn is through the transmission of wire leading pipe; and by after the cutting away of yarn cutter; drawn by a roller, grip strand together with roller by apron, make strand be stretched; claimed good surface of roller is not damaged by suction gun, billhook etc.; apron is intact, without groove mark and seamless with surface of roller pressing, and apron is without twining silk; stiff silk etc. otherwise easily occurs
2) only twisting with the fingers by twist arrester after roller, is fixed on strand hot tank top, plays the effect preventing strand yarn twist unevenness,
3) through hot tank, strand is heated after only twisting with the fingers, and fiber cooling of coiled structure after false twisting is fixed by coldplate,
4) kneading through scroll tube after cooling, the effect of scroll tube is to produce mechanical distortion stress, in order to deformation processing, it is the core of elasticizer；
5) then the tension force of warp tension device detects the traction with the second roller: on detection line, spinline tension fluctuation is monitored, and prevents exception tension force silk generation of weaving；
6) then through the purging of network nozzle, so that strand compressed air purging is formed network-like node, strand coherent is increased；
7) then through traction and the spy silk of yarn probe of the 3rd roller, when silk breaks end, information can be fed back to yarn cutter by yarn probe in time; silk is cut off by yarn cutter; roller, no longer for no longer having strand process in the whole the Silk Road of silk, prevents that roller twines silk, apron wheel twines silk, to protect equipment；
8) then through oil tanker oiling treatment, mainly to elastic filament plus suitable oil preparation, to improve the convergence of fiber, increase the flatness of fiber, improve the antistatic behaviour of fiber, the woven requirement in road after adaptation；
9) finally wind, allow the uniform regular package of strand become cationic dye capable of dyeing chinlon 6 elastic filament.
The technique producing cationic dye capable of dyeing chinlon 6 elastic filament the most according to claim 4, it is characterised in that: cationic dye capable of dyeing chinlon 6 preoriented yarn main technologic parameters controls as follows:
Biphenyl temperature: 250-288 DEG C, melt temperature: 253-275 DEG C, spins pressure: 110-120kgf/ cm2
, G.P rotating speed: 12.3-25.4rpm, O.P rotating speed: 11.5-18.9rpm, side-blown wind speed: 0.35-0.6m/s, draw ratio DR:1.03-1.05, spin speed: 4300-4600m/min.
The technique producing cationic dye capable of dyeing chinlon 6 elastic filament the most according to claim 5, it is characterised in that: cationic dye capable of dyeing chinlon 6 elastic filament main technologic parameters controls as follows:
Ingot group: 1-4-1 ~ 1-8-1, heater temperature: 170-210 DEG C, draw ratio DR:1.25-1.30, D/Y compares: 1.5-2.5, over feed rate(OFR) :-4.2, oil tanker rotating speed: 0.23-0.60rpm, T2/T1:0.5-1.5, θ: 19 °-28 °.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977959A (en) * | 2018-08-03 | 2018-12-11 | 东丽酒伊织染（南通）有限公司 | A kind of preparation method of the heterochromatic cotton sense elastic force false twist composite yarn line of superelevation bullet and its production technology of heterochromatic cotton sense elastic fabric |
| CN109610065A (en) * | 2019-01-08 | 2019-04-12 | 长乐力恒锦纶科技有限公司 | A kind of production technology of the elastic filament of 6 delustring regenerated fiber porous fine denier of polyamide fibre |
| CN112725911A (en) * | 2020-12-22 | 2021-04-30 | 南通新帝克单丝科技股份有限公司 | High-dpf polyamide industrial yarn for electronic components and production method thereof |
| CN115467065A (en) * | 2022-10-11 | 2022-12-13 | 福建景丰科技有限公司 | Composite bicolor polyamide yarn and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493016A (en) * | 2011-12-21 | 2012-06-13 | 苏州大学 | Porous superfine polyamide 6 fully-drawn yarn, preparation method thereof, and equipment thereof |
| CN104099678A (en) * | 2014-07-24 | 2014-10-15 | 福建凯邦锦纶科技有限公司 | Novel fine-denier special-shaped-section fiber nylon production technology |
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- 2015-07-10 CN CN201510402434.9A patent/CN106319654B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493016A (en) * | 2011-12-21 | 2012-06-13 | 苏州大学 | Porous superfine polyamide 6 fully-drawn yarn, preparation method thereof, and equipment thereof |
| CN104099678A (en) * | 2014-07-24 | 2014-10-15 | 福建凯邦锦纶科技有限公司 | Novel fine-denier special-shaped-section fiber nylon production technology |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977959A (en) * | 2018-08-03 | 2018-12-11 | 东丽酒伊织染（南通）有限公司 | A kind of preparation method of the heterochromatic cotton sense elastic force false twist composite yarn line of superelevation bullet and its production technology of heterochromatic cotton sense elastic fabric |
| CN109610065A (en) * | 2019-01-08 | 2019-04-12 | 长乐力恒锦纶科技有限公司 | A kind of production technology of the elastic filament of 6 delustring regenerated fiber porous fine denier of polyamide fibre |
| CN112725911A (en) * | 2020-12-22 | 2021-04-30 | 南通新帝克单丝科技股份有限公司 | High-dpf polyamide industrial yarn for electronic components and production method thereof |
| CN115467065A (en) * | 2022-10-11 | 2022-12-13 | 福建景丰科技有限公司 | Composite bicolor polyamide yarn and preparation method thereof |
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| CN106319654B (en) | 2018-09-21 |
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