CN117535834A - Spinning method and yarn of vortex spinning - Google Patents
Spinning method and yarn of vortex spinning Download PDFInfo
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- CN117535834A CN117535834A CN202410033042.9A CN202410033042A CN117535834A CN 117535834 A CN117535834 A CN 117535834A CN 202410033042 A CN202410033042 A CN 202410033042A CN 117535834 A CN117535834 A CN 117535834A
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000007382 vortex spinning Methods 0.000 title claims abstract description 47
- 238000009987 spinning Methods 0.000 title claims abstract description 44
- 239000000835 fiber Substances 0.000 claims abstract description 49
- 229920000728 polyester Polymers 0.000 claims abstract description 19
- 229920000297 Rayon Polymers 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 206010020112 Hirsutism Diseases 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 13
- 239000010985 leather Substances 0.000 abstract description 16
- 230000007613 environmental effect Effects 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 15
- 239000003921 oil Substances 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 10
- 239000008041 oiling agent Substances 0.000 description 7
- 229920000742 Cotton Polymers 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229940057995 liquid paraffin Drugs 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/28—Heating or cooling arrangements for yarns
-
- 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
-
- 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
- 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]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention relates to a spinning method of vortex spinning, which comprises the steps of sequentially carrying out a drafting process and vortex spinning on chemical fibers (polyester fibers, viscose fibers or polyester-viscose blend fibers) to form yarns, wherein the temperature of the drafting process is 25-28 ℃, and the ambient temperature of the vortex spinning is 31 ℃; the single yarn breaking strength, the yarn evenness variation coefficient, the hairiness index, the kilometer neps and the like of the spun yarn are obviously improved compared with the prior art. According to the invention, the temperature of the drafting process and the environmental temperature of vortex spinning are independently controlled, so that the problems of sticking the leather roller and yarn breakage and silk exposure are well solved under the condition of not changing the environmental humidity, the yarn quality is obviously improved, the workshop working efficiency is also improved, and the economic benefit is improved as a whole; the spun yarn has excellent indexes.
Description
Technical Field
The invention belongs to the technical field of vortex spinning, and relates to a spinning method and yarn for vortex spinning.
Background
In summer, in order to improve economic benefit, the production process of vortex spinning is more suitable for reaching the ambient temperature of 32 ℃, but in the drafting link of vortex spinning, the ambient temperature can influence volatilization of the chemical fiber surface oiling agent, and the chemical fiber oiling agent has good antistatic property due to the characteristics of lubrication and strong moisture absorption.
The main components of the chemical fiber oiling agent are lubricating oil, and the main components of the chemical fiber oiling agent are paraffin and liquid hydrocarbon, and the boiling points of the paraffin and the liquid hydrocarbon are lower and are about 200 ℃, so that the oiling agent is easy to volatilize when heated. And the higher the temperature, the greater the degree of volatilization of the oil. The high temperature above 30 ℃ can weaken intermolecular force in the oil agent, intensify molecular movement and reduce the surface tension of the oil agent, so that the oil agent molecules are easier to separate from the surface, and elements such as carbon, hydrogen, oxygen and the like contained in the oil agent molecules are easy to undergo decomposition reaction at high temperature, thereby volatilizing the oil agent. Therefore, the volatilization degree of the oil agent is low at 20-30 ℃, the antistatic property is good, the static phenomenon is not easy to generate, the possibility of winding the leather roller is small, and when the temperature is higher than 30 ℃, the oil agent is extremely volatile, the volatilization degree is enough to generate static electricity, so that the leather roller is wound.
In the prior art, the temperature of the drafting and the temperature of the vortex spinning are consistent, namely the temperature of a workshop, so that the quality of the finished yarn is poor when the temperature is low, and the phenomenon of sticking a leather roller exists when the temperature is high, thereby finally influencing the quality of the finished yarn.
For example: document 1 (influence of air temperature and humidity on jet vortex spinning spinnability [ J ]. Shanghai textile technology, 2015,43 (04): 65-68.doi: 10.16549/j.cnki.issn.1001-2044.2015.04.023.) the spinning test was performed with a polyester (1.55 dtex x 38 mm) fiber raw material in a jet vortex spinning sample machine, with the compressed air and spinning ambient temperature controlled to be 20 ℃, wherein the spinning process parameters were: draft ratio 53.75 times, spinning speed 170m/min, front jaw-to-nozzle inlet distance 14 mm, guide needle-to-cone distance 1mm, spinning air pressure 0.4-0.6 MPa; the quality of the finally prepared polyester yarn is poor, the breaking strength of the polyester yarn is 17.43cN/tex, the strength cv is 11.15%, the yarn evenness variation coefficient is 22.39%, and the resultant yarn quality comprehensive score is 0.05.
Document 2 (influence of temperature and humidity and moisture regain on spinnability of jet vortex spun viscose and polyester [ C ]. Sixteenth national institute of novel spinning academy of sciences: 2012:107-111.) describes that a spinning experiment is performed using a jet vortex spinning sample machine at a spinning ambient temperature of 32 ℃, wherein parameters are set such that a spinning speed is 170m/min and a jet pressure is 0.55MPa; the yarn quality finally prepared is poor, the breaking strength of the viscose yarn of 20.64tex is 9.92cN/tex, the yarn evenness variation coefficient is 20.95%, and the kilo-meter nep (+ 200%) is 50/km; the breaking strength of the 15.98tex polyester yarn is 20.13cN/tex, the yarn evenness variation coefficient is 20.98 percent, and the kilo-meter nep (+ 200%) is 59/km.
Therefore, research on a spinning method and yarn for vortex spinning which effectively improves yarn quality is a technical problem which is not realized and is always desired to be solved by a person skilled in the art.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a spinning method and yarn for vortex spinning.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a spinning method of vortex spinning sequentially carries out a drawing process and vortex spinning on chemical fibers to form yarns, wherein the temperature of the drawing process is 25-28 ℃, the temperature is higher than 28 ℃, obvious phenomenon of sticking a leather roller exists, the temperature is lower than 25 ℃, the fibers are easy to harden and are not favorable for cohesion of the fibers, the leather roller also can harden and skid, so that broken ends are increased, and the environment temperature of vortex spinning is 31 ℃;
in the drawing process, the temperature is adjusted by installing a cooling device;
the cooling device is an external industrial air conditioner, the guide pipes of the industrial air conditioner are arranged at two sides of the roller, cool air with the temperature of 25-28 ℃ is blown into the guide pipes, and the cool air flows along the yarn output direction so as to ensure that the temperature of the drafting process is kept at 25-28 ℃.
The oil agent used for drafting is industrial white oil, also called liquid paraffin or paraffin oil, is a mixture of deeply refined mineral oil and normal isoparaffin with the main component of C16-C13, has poor heat resistance and is easy to volatilize at high temperature, and the phenomenon that the oil agent volatilizes along with the increase of the volatilization degree easily causes the phenomenon that the oil agent sticks to a leather roller. In the prior art, only the combination and the drafting function are realized in the drafting link of the vortex spinning, the temperature adjusting function is not realized, and the temperature of the vortex spinning is controlled by the temperature of a workshop. When the workshop temperature is higher than 30 ℃, the energy consumption is reduced, but the phenomenon of sticking the leather roller exists in the drawing process, so that the quality of the finished yarn is poor; when the workshop temperature is reduced, the phenomenon of sticking the leather roller is relieved, the spinning quality is improved, but the energy consumption is overlarge, and the overall economic benefit is reduced. The invention creatively provides a method for improving yarn quality by independently controlling the temperature of a drafting process and the ambient temperature of vortex spinning, wherein the temperature of the drafting process is set to be 25-28 ℃, the ambient temperature of the vortex spinning is set to be 31 ℃, the problem of sticking a leather roller is well solved under the condition of not changing ambient humidity, and the problems of yarn breakage and yarn exposure are solved, so that the yarn quality is obviously improved, the working efficiency of a workshop is also improved, the energy cost is saved, and the economic benefit is improved as a whole.
As a preferable technical scheme:
according to the spinning method of vortex spinning, the chemical fibers are polyester fibers, viscose fibers or polyester-viscose blend fibers.
According to the spinning method of vortex spinning, the polyester content in the polyester-viscose blend fiber is more than 50 wt%.
The invention also provides a yarn spun by the vortex spinning method, when the chemical fiber is polyester fiber and the linear density of the yarn is 15-22 tex, the single yarn breaking strength is 24-30 cN/tex, the yarn evenness variation coefficient is 11.6-15.7%, and the hairiness index H value is 4.5-5.4;
when the chemical fiber is viscose fiber and the linear density of the yarn is 15-22 tex, the single yarn breaking strength is 11-15 cN/tex, the yarn evenness variation coefficient is 11.9-14.5%, and the kilometer neps (+200%) are 25-52/km;
when the chemical fiber is polyester-viscose blend fiber with the polyester content of 67wt% and the linear density of the yarn is 15-22 tex, the single yarn breaking strength is 19-21.1 cN/tex, the yarn evenness variation coefficient is 12-15.5%, and the kilometer nep (+ 200%) is 15-26/km.
The beneficial effects are that:
(1) According to the spinning method for vortex spinning, provided by the invention, under the condition that the ambient humidity is not changed, the problems of sticking the leather roller are well solved, the problems of yarn breakage and yarn exposure are alleviated, so that the yarn quality is obviously improved, the workshop working efficiency is also improved, and the economic benefit is improved as a whole;
(2) Compared with the prior art, the yarn spun by the method has obviously improved breaking strength, evenness and the like.
Drawings
FIG. 1 is a schematic diagram of an improved vortex spinning machine;
FIG. 2 is a schematic diagram of an improved apparatus for an vortex spinning machine, wherein the arrow direction is the cool air flow direction;
wherein, 1-cotton sliver, 2-drafting device, 3-nozzle, 4-yarn cleaning device, 5-cone yarn, 6-air conditioner and 7-leather roller.
Detailed Description
The invention is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
In the embodiment of the invention, the related indexes such as linear density, breaking strength, yarn evenness variation coefficient, hairiness index H value, kilometer nep (+ 200%) and the like are measured according to the national textile industry standard of the people's republic of China (FZ/T12039-2013).
According to the national textile industry Standard of the people's republic (FZ/T12039-2013), the first class yarn is characterized as follows:
| yarn raw material | Terylene | Adhesive glue | Polyester and viscose blend (polyester content more than 50%) |
| Linear density/tex | 19.1~22.0 | 19.1~22.0 | 19.1~22.0 |
| Single yarn breaking strength/(cN/tex) | 24.0 | 10.5 | 20.0 |
| Coefficient of variation of uniformity of the yarn/% | 15.0 | 14.5 | 15.0 |
| Hairiness index H value | 5.4 | - | |
| Kilometer neps (+200%)/km | - | 45 | 20 |
Example 1
A spinning method of vortex spinning comprises the following specific processes:
drawing the polyester fiber in sequence, and spinning by vortex to form yarn;
as shown in fig. 1-2, the temperature is adjusted by installing a cooling device in the drawing process, the cooling device is an external industrial air conditioner 6, the guide pipes of the industrial air conditioner 6 are arranged at two sides of the roller, the guide pipes are blown with cool air with the temperature of 27 ℃, and the cool air flows along the yarn output direction; the ambient temperature of vortex spinning is 31 ℃;
the spinning method of vortex spinning comprises the following specific processes: the cotton sliver 1 is directly fed into the drafting device 2, the drafted cotton sliver is output from the jaw of the front roller by utilizing the speed difference between the leather rollers 7, the drafted cotton sliver is immediately sucked by negative pressure generated by vortex in the nozzle 3 of the spinning device to form core fibers, when the tail ends of the fibers are separated from the front roller, the fibers are expanded under the action of the vortex, cover the surface of the hollow spindle and rotate along the fixed hollow inner wall, and the tail ends of the fibers are wound on the yarn core along with the forward movement of the cotton sliver to ensure that the yarns obtain twist to form yarns; the yarn is subjected to yarn defect removal through a yarn cleaning device 4, and finally the yarn is wound and molded to form a bobbin yarn 5;
the spinning process parameters are as follows:
spinning speed: 500m/min;
spinning air pressure: 0.55MPa;
total draft t.d.r:243;
main draft m.d.r:30;
back draft b.d.r:3, a step of;
roller gauge: 41mm×45 mm;
feed ratio: 0.97;
crimping ratio: 1.02;
distance of spindle to front roller: 20mm.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 27.4cN/tex, a yarn evenness variation coefficient of 11.8% and a hairiness index H value of 4.59.
Comparative example 1
A spinning method of vortex spinning is basically the same as that of example 1, except that a temperature reducing device is not installed in the drawing process, and the ambient temperature is 31 ℃.
The yarn has a linear density of 19.7tex, a single yarn breaking strength of 25.7cN/tex, a yarn evenness variation coefficient of 13.3% and a hairiness index H value of 5.45.
Comparing comparative example 1 with example 1, it was found that the yarn of example 1 had an increased breaking strength, a more uniform evenness and a relatively reduced hairiness, because the ambient temperature of comparative example 1 was too high, the polyester oiling agent was volatilized, the static electricity was increased, the yarn was easily wound around the leather roller, the yarn fineness was uneven, the breaking strength was reduced, and the hairiness was increased.
Comparative example 2
A spinning method of vortex spinning is basically the same as that of example 1, except that a temperature reducing device is not installed in the drawing process, and the ambient temperature is 28 ℃.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 26.5cN/tex and a yarn evenness variation coefficient of 12.6%.
Comparing comparative example 2 with example 1, it was found that the yarn breakage strength of example 1 was increased and the yarn evenness variation coefficient was decreased, because the cool air in the cooling device in the drawing step of example 1 extended the yarn direction, which was favorable for straightening the fibers and for conveying the fibers to the subsequent step, and the yarn evenness and the breakage strength were both improved.
Example 2
A spinning method of vortex spinning comprises the following specific processes:
sequentially carrying out a drawing process and vortex spinning on the viscose fiber to form yarn;
in the drafting process, the temperature is regulated by installing a cooling device, the cooling device is an external industrial air conditioner, guide pipes of the industrial air conditioner are arranged at two sides of a roller, cool air with the temperature of 27 ℃ is blown into the guide pipes, and the cool air flows along the yarn output direction; the ambient temperature of vortex spinning is 31 ℃;
the spinning process parameters are as follows:
spinning speed: 500m/min;
spinning air pressure: 0.5MPa;
total draft t.d.r:240, a step of;
main draft m.d.r:23;
back draft b.d.r:3.5;
roller gauge: 41mm×45 mm;
feed ratio: 0.97;
crimping ratio: 1.02;
distance of spindle to front roller: 20mm.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 14.8cN/tex, a yarn evenness variation coefficient of 12.7%, and a kilo-meter nep (+200%) of 26/km.
Comparative example 3
A spinning method of vortex spinning is basically the same as that of example 2, except that a temperature reducing device is not installed in the drawing process, and the ambient temperature is 31 ℃.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 13.0cN/tex, a yarn evenness variation coefficient of 14.4% and a kilo-meter nep (+200%) of 46/km.
Comparing comparative example 3 with example 2, it was found that the breaking strength of the single yarn in example 2 was increased, yarn evenness was increased, and neps were also significantly reduced, because the ambient temperature of comparative example 3 was too high, the adhesive oil was volatilized, static electricity was increased, the yarn was easily wound around the leather roller, the yarn fineness was uneven, and the breaking strength was reduced.
Comparative example 4
A spinning method of vortex spinning is basically the same as that of example 2, except that a temperature reducing device is not installed in the drawing process, and the ambient temperature is 28 ℃.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 12.8cN/tex, a yarn evenness variation coefficient of 13.1%, and a kilo-meter nep (+200%) of 30/km.
Comparing comparative example 4 with example 2, it was found that the yarn breaking strength of example 2 was increased, the uniformity coefficient of variation of yarn evenness was decreased, and the neps were also decreased to some extent, because the cool air in the cooling device in the drawing step of example 2 extended the yarn feeding direction, which was favorable for straightening the fibers, and led to a decrease in neps; and is favorable for conveying the fiber to the subsequent process, so that the evenness and the breaking strength of the yarn are improved.
Example 3
A spinning method of vortex spinning comprises the following specific processes:
sequentially carrying out a drawing process and vortex spinning on polyester-viscose blend fiber with 67% of polyester content to form yarn;
in the drafting process, the temperature is regulated by installing a cooling device, the cooling device is an external industrial air conditioner, guide pipes of the industrial air conditioner are arranged at two sides of a roller, cool air with the temperature of 27 ℃ is blown into the guide pipes, and the cool air flows along the yarn output direction; the ambient temperature of vortex spinning is 31 ℃;
the spinning process parameters are as follows:
spinning speed: 500m/min;
spinning air pressure: 0.52MPa;
total draft t.d.r:243;
main draft m.d.r:30;
back draft b.d.r:3, a step of;
roller gauge: 41mm×45 mm;
feed ratio: 0.97;
crimping ratio: 1.02;
distance of spindle to front roller: 20mm.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 21.1cN/tex, a yarn evenness variation coefficient of 12.2% and a kilo-meter nep (+200%) of 17/km.
Comparative example 5
A spinning method of vortex spinning is basically the same as that of example 3, except that a temperature reducing device is not installed in the drawing process, and the ambient temperature is 30 ℃.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 19cN/tex, a yarn evenness variation coefficient of 15.3% and a kilo-meter nep (+200%) of 22/km.
Comparing comparative example 5 with example 3, it was found that the breaking strength of the single yarn in comparative example 5 was reduced, the yarn evenness was reduced, and the nep was increased because the chemical fiber oiling agent was volatilized and the static electricity was increased due to the excessively high ambient temperature, and the yarn was easily wound around the leather roller, resulting in uneven yarn fineness and reduced breaking strength.
Comparative example 6
A spinning method of vortex spinning is basically the same as that of example 3, except that a temperature reducing device is not installed in the drawing process, and the ambient temperature is 28 ℃.
The yarn obtained had a linear density of 19.7tex, a single yarn breaking strength of 20.0cN/tex, a yarn evenness variation coefficient of 12.7%, and a kilo-meter nep (+200%) of 19/km.
Comparing comparative example 6 with example 3, it was found that the yarn strength and uniformity of example 3 were improved to a small extent, and neps were also reduced because the cool air in the cooling device in the drawing process extended the yarn direction, which was favorable to straightening the fibers and conveying the fibers to the subsequent process, so that neps were reduced, and the evenness and breaking strength were improved.
Claims (4)
1. A spinning method of vortex spinning, to the chemical fiber in turn carries on the drafting process, the vortex spins and forms the yarn, its characteristic lies in: the temperature of the drafting process is 25-28 ℃, and the ambient temperature of vortex spinning is 31 ℃;
in the drawing process, the temperature is adjusted by installing a cooling device;
the cooling device is an external industrial air conditioner, the guide pipes of the industrial air conditioner are arranged at two sides of the roller, cool air with the temperature of 25-28 ℃ is blown into the guide pipes, and the cool air flows along the yarn output direction.
2. The spinning method according to claim 1, wherein the chemical fiber is polyester fiber, viscose fiber or polyester-viscose blend fiber.
3. The spinning method according to claim 2, wherein the polyester content in the polyester-viscose blend fiber is more than 50 wt%.
4. A yarn spun by the vortex spinning method of any one of claims 1 to 3, characterized in that: when the chemical fiber is polyester fiber and the linear density of the yarn is 15-22 tex, the single yarn breaking strength is 24-30 cN/tex, the yarn evenness variation coefficient is 11.6-15.7%, and the hairiness index H value is 4.5-5.4;
when the chemical fiber is viscose fiber and the linear density of the yarn is 15-22 tex, the single yarn breaking strength is 11-15 cN/tex, the yarn evenness variation coefficient is 11.9-14.5%, and the kilometer neps (+200%) are 25-52/km;
when the chemical fiber is polyester-viscose blend fiber with the polyester content of 67wt% and the linear density of the yarn is 15-22 tex, the single yarn breaking strength is 19-21.1 cN/tex, the yarn evenness variation coefficient is 12-15.5%, and the kilometer nep (+ 200%) is 15-26/km.
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