CN113668108A - Production method of cotton-like silk - Google Patents
Production method of cotton-like silk Download PDFInfo
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- CN113668108A CN113668108A CN202110984611.4A CN202110984611A CN113668108A CN 113668108 A CN113668108 A CN 113668108A CN 202110984611 A CN202110984611 A CN 202110984611A CN 113668108 A CN113668108 A CN 113668108A
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- 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
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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- 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
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Manufacturing & Machinery (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The application relates to the technical field of spinning, in particular to a production method of cotton-like yarns. The production method of the cotton-like silk comprises the following steps: 1) compounding the extinction POY yarn and the extinction FDY yarn, and then carrying out deformation treatment and false twisting treatment to obtain false twisted yarn; the extinction POY yarns are extinction polyester POY yarns, and the extinction FDY yarns are extinction polyester FDY yarns; the stretching ratio during deformation treatment is 1.3-1.5; 2) carrying out heat setting treatment on the false-twisted yarn prepared in the step 1) to obtain a set-treated yarn; 3) oiling and winding the sizing treatment yarn prepared in the step 2) to obtain the cotton-like yarn. According to the cotton-like yarn production method, the prepared POY yarns and FDY yarns are adopted, deformation treatment is directly carried out after compounding, the used POY yarns and FDY yarns are relatively stable, deformation is more uniform during compounding, and the generated composite yarns are more stable.
Description
Technical Field
The application relates to the technical field of spinning, in particular to a production method of cotton-like yarns.
Background
The composite fiber of the POY yarn and the FDY yarn has differential shrinkage, so that the fabric has the characteristics of drapability, velvet feeling and the like, and the prepared fabric is soft and elastic, is not easy to wrinkle, has full cloth cover, and can be used for preparing high-grade clothes. At present, when the composite fiber of POY (polyester pre-oriented yarn) and FDY (fully drawn yarn) is used for production, POY and FDY obtained by direct spinning are mostly adopted for compounding.
The Chinese patent with application publication number CN1888157A discloses a spinning method of polyester melt POY and FDY composite yarn, which comprises the following steps: a. spinning: respectively melting the POY and FDY polyester melts onto POY and FDY spinneret plates, and respectively and simultaneously drawing POY yarns and FDY yarns from the spinneret plates through POY and FDY yarn channels; wherein, the spinning positions on the POY filament spinneret plate correspond to the spinning positions on the FDY filament spinneret plate one by one. The initial temperature was 270-310 ℃. b. Doubling: b, respectively oiling the POY yarns and the FDY yarns pulled out in the step a by an oiling frame and an oiling agent equipartition device, then directly combining the POY yarns and the FDY yarns, doubling the POY yarns by two extending rollers and two networers, wherein the networers are arranged between the extending rollers and the extending rollers as well as between the extending rollers and a winder; the extension roller is connected with a separation roller. c. Silk hanging: and c, simultaneously hanging the composite yarn doubled in the step b by a yarn guide, and winding the composite yarn into a POY and FDY composite product by a winding machine.
In view of the above-mentioned related technologies, the inventors believe that both POY and FDY used in this spinning method are obtained by on-site spinning and directly drawn, the stability of the composite fiber is poor, and the boiling water shrinkage is high.
Disclosure of Invention
In order to reduce the boiling water shrinkage of the composite fiber, the application provides a production method of cotton-like yarns.
The production method of the cotton-like silk adopts the following technical scheme:
a production method of cotton-like silk comprises the following steps:
1) compounding the extinction POY yarn and the extinction FDY yarn, and then carrying out deformation treatment and false twisting treatment to obtain false twisted yarn; the extinction POY yarns are extinction polyester POY yarns, and the extinction FDY yarns are extinction polyester FDY yarns; the stretching ratio during deformation treatment is 1.3-1.5;
2) carrying out heat setting treatment on the false-twisted yarn prepared in the step 1) to obtain a set-treated yarn;
3) oiling and winding the sizing treatment yarn prepared in the step 2) to obtain the cotton-like yarn.
By adopting the technical scheme, the POY yarns and the FDY yarns are prepared POY yarns and FDY yarns, the raw material yarns have stable performance, and are more stable and uniform in deformation and lower in boiling water shrinkage rate during composite drawing. And directly performing deformation treatment (stretching and the like) after compounding, wherein the deformation treatment is synchronous stretching, the consistency of the stretching degrees of the POY yarns and the FDY yarns is easier to control, and then simultaneously performing false twisting, the deformation degrees of the two yarns at the same twisting direction position are close in the false twisting process, so that the POY yarns and the FDY yarns are conveniently and tightly intertwined together, the stability of the composite yarns is greatly improved, the difference of the shrinkage rates of the two yarns is smaller, and the boiling water shrinkage rate is also lower. The stretching ratio during the deformation stretching is set to be 1.3-1.5, the stretching ratio is lower, and the increase of the differential shrinkage of the POY/FDY composite yarn caused by high stretching ratio can be avoided.
Preferably, the temperature during the deformation treatment is 140-180 ℃.
Through adopting above-mentioned technical scheme, can reduce two kinds of silks and appear the probability of gluing, doubling under the higher temperature. Because POY warp when tensile by the folding chain of macromolecule to straightening chain transition in the tensile process, higher temperature is favorable to fibrous tensile deformation, but high temperature can lead to the fibre to be close to the melting point of material, and then leads to appearing between two kinds of silks and cohere and doubling, and the nexus on the compound silk is inhomogeneous when leading to the false twist, and this application has adopted lower temperature, has reduced the appearance of cohering and doubling by a wide margin, and the draw ratio that this application was injectd is lower in addition, also more adapts to with lower stretching temperature.
Preferably, the temperature during the heat setting treatment is 130-150 DEG C
By adopting the technical scheme, the temperature during heat setting treatment is lower, and the temperature during heat setting treatment can be set to be slightly lower than the temperature during deformation and stretching, so that the stability of the composite fiber can be improved. Can play the effect of eliminating curling internal stress, reducing the heat shrinkage rate to fibrous drawing and false twist during heat setting processing, however, because the deformation stretching temperature of this application is lower, the adhesion phenomenon between two kinds of silks is few, and follow-up too high heat setting temperature can lead to two kinds of silks that compound together after the false twist break away from easily or the pine circle, and the heat setting temperature of this application can guarantee fully to eliminate curling internal stress, reduce the shrinkage rate, still is difficult for appearing the pine circle phenomenon simultaneously.
Preferably, the draw ratio in the heat-setting treatment is 1.1 to 1.3.
Through adopting above-mentioned technical scheme, because the temperature of the heat setting of this application is lower, the draw ratio when setting up the heat setting and handling is less can reduce tensile deformation and produce adverse effect to fibrous structure and mechanical properties.
Preferably, the extinction POY yarn is prepared by a method comprising the following steps:
s1, melting and blending polyester chips, a stabilizer and titanium dioxide, extruding and granulating to obtain extinction master batches; the mass ratio of the polyester chip to the stabilizer to the titanium dioxide is 1000:1-2: 12-25;
s2, melting and extruding the extinction master batch, spraying yarns, cooling, oiling and winding to obtain the extinction master batch; the winding speed is 3600-.
By adopting the technical scheme, the stabilizer is added into the raw materials during the preparation of the extinction POY, and the polyester is extruded and then granulated to prepare the master batch, so that the stability of the polyester before spinning can be improved, and the extinction master batch can be conveniently stored. When the spinning is carried out, the very high winding speed is adopted, so that when the filaments are subjected to orientation crystallization at a position close to a spinning hole, the crystallization speed is higher, and the orientation degree is larger. Preferably, the mass ratio of the polyester chip to the stabilizer to the titanium dioxide is 1000:1-2: 15-25.
Preferably, when the polyester chip, the stabilizer and the titanium dioxide are melt blended in step S1, 1, 3-butanediol is further added, and the mass ratio of the 1, 3-butanediol to the polyester chip is 3-5: 1000.
By adopting the technical scheme, during melt blending, the added small amount of 1, 3-butanediol can promote better compatibility of titanium dioxide and polyester materials, reduce micro gaps generated by quality inspection of titanium dioxide and polyester in the fiber, and ensure the mechanical property of the fiber during high-speed spinning.
Preferably, when the polyester chip, the stabilizing agent and the titanium dioxide are melt blended in the step S1, SEBS particles and aluminum stearate are also added, and the mass ratio of the SEBS particles, the aluminum stearate and the polyester chip is 110-120:12-15: 1000.
By adopting the technical scheme, when melt blending is carried out, the elasticity of the POY yarns can be increased to a certain extent by adding the SEBS particles, the filament breakage phenomenon of the single yarns is not easy to occur in the high-speed spinning process, and more importantly, the POY yarns and the FDY yarns are combined more tightly in the subsequent false twisting process, so that the POY yarns and the FDY yarns are suitable for spinning with higher twist. The aluminum stearate is added to improve the bonding between the SEBS and the polyester, contains metal ions and linear organic groups, and can be well bonded with various groups on the SEBS and the polyester, so that the compatibility and bonding capability of the SEBS and other components are improved.
Preferably, the mass fraction of moisture in the polyester chip in step S1 is not more than 0.01%.
By adopting the technical scheme, the moisture content of the polyester chip is controlled to be very low, the phenomenon that the polyester chip carries water vapor by monofilaments during the high-speed spinning can be reduced to the greatest extent, and the occurrence probability of broken filaments and broken ends is reduced.
Preferably, the temperature of the melt extrusion in step S2 is 275-290 ℃.
By adopting the technical scheme, the temperature during melt extrusion is higher, so that the melt obtained after melting has higher fluidity, the subsequent spinning speed is higher, and the phenomenon of uneven fiber in the high-speed spinning process is reduced.
Preferably, the melt extrusion in step S2 is performed by using a screw extruder, and the five-stage temperatures of the screw extruder are 276-.
By adopting the technical scheme, the temperature of the front two sections of the screw extruder is set to be slightly lower, so that the polyester chips are not melted too early, the problem of nonuniform materials caused by ring combination due to the fact that the polyester chips and a melt are mixed together is reduced, and the temperature of the rear three sections is set to be higher, so that the material is favorably propelled, and the uniformity of the materials is favorably improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the cotton-like yarn production method, the prepared POY yarns and FDY yarns are adopted, deformation treatment is directly carried out after compounding, the used POY yarns and FDY yarns are relatively stable, deformation is more uniform during compounding, and the generated composite yarns are more stable.
2. According to the cotton-like yarn production method, the POY yarns and the FDY yarns are subjected to deformation stretching to be synchronous stretching, the deformation consistency of the POY yarns and the FDY yarns is easier to control, the stability of the composite fibers can be finally improved, and the boiling water shrinkage rate is reduced.
Detailed Description
The present application will be described in further detail with reference to examples.
In the production method of the cotton-like yarn, preferably, the extinction POY yarn is a semi-extinction yarn, and the extinction FDY yarn is a full-extinction yarn. More preferably, the extinction POY yarn has a specification of 55dtex, and the extinction FDY yarn has a specification of 111 dtex.
In the production method of the cotton-like yarn, the extinction POY yarn and the extinction FDY yarn are combined and then enter an auxiliary roller, and then are subjected to deformation treatment after being compounded by a network device, wherein the deformation treatment is to pass through a first roller, then pass through a deformation hot box and then pass through a second roller; and processing the composite yarn after passing through the second roller by a false twister to obtain false twisted yarn. And (4) performing heat setting treatment on the false-twisted yarns through a setting hot box. The heat-set shaped yarn passes through a third roller. The composite yarn passing through the third roller is processed through a yarn detecting port, then oiled through an oil tanker, and wound through a DTY winding device.
The speed of the first roller is 295-350 m/min. The speed of the second roller is 390-450 m/min.
In the preparation of the POY delustered yarn, the polyester chip is polyethylene terephthalate (PET). Preferably, the polyester chip has a carboxyl end group content of 17mol/t and an ash content of 0.05%.
The polyester chips are dried before melt blending to ensure that the moisture mass fraction is not more than 0.01 percent. The drying is carried out at 135 ℃ for 4 h. Further, the polyester chips are subjected to impurity removal before melt blending, then are heated and crystallized at the temperature of 160-170 ℃ for 10-15min, and then are dried.
When the POY extinction yarn is prepared, cooling after spinning comprises circular blowing cooling and side blowing cooling, wherein the temperature of circular blowing is 30-35 ℃, the temperature of side blowing is 18-25 ℃, and the air speed of side blowing is 0.5-1 m/s.
When the POY extinction yarn is prepared, the stabilizer is 2-hydroxy-4-n-octoxy benzophenone. And adding diacylglycerol acyl-phosphate serine and titanium isopropyl tristearate when the polyester chips are melted and blended, wherein the mass ratio of the diacylglycerol acyl-phosphate serine to the titanium isopropyl tristearate to the polyester chips is 8-9:2-3: 1000. Furthermore, SEBS elastomer is added during melt blending, and the mass ratio of the SEBS elastomer to the polyester chip is 110-120: 1000.
When the POY extinction yarn is prepared, the five sections of the screw extruder are respectively a conveying section, a melting section, a mixing section, an exhaust section and a homogenizing section.
Preparation example 1 of matte POY yarn
The preparation method of the extinction POY comprises the following steps:
s1, removing impurities from polyester chips, heating and crystallizing at 160 ℃ for 15min, and then drying until the moisture content is not more than 0.1%;
s2, melting and blending the dried polyester chips, 2-hydroxy-4-n-octoxy benzophenone and titanium dioxide according to the mass ratio of 1000:1.2:15, extruding and granulating to obtain extinction master batches;
s3, adding the extinction master batch prepared in the step S2 into a screw extruder, and carrying out melt blending and extrusion, wherein the temperatures of five regions of the screw extruder are 277 ℃, 280 ℃, 282 ℃, 283 ℃ and 286 ℃; pumping into a spinning assembly through a metering pump, filtering, spinning through a spinning hole with the diameter of 0.15mm, cooling through circular blowing and side blowing, wherein the temperature of circular blowing is 35 ℃, the temperature of side blowing is 25 ℃, and the wind speed of side blowing is 0.5 m/s;
and S4, oiling the cooled filament through an oil mist nozzle, and then winding the filament through a guide wheel and a winding head at the winding speed of 4500m/min to obtain the extinction POY filament.
Preparation example 2 of matte POY yarn
The preparation method of the extinction POY comprises the following steps:
s1, removing impurities from polyester chips, heating and crystallizing at 160 ℃ for 15min, and then drying until the moisture content is not more than 0.1%;
s2, melting and blending the dried polyester chips, 2-hydroxy-4-n-octoxy benzophenone and titanium dioxide according to the mass ratio of 1000:1.2:15, extruding and granulating to obtain extinction master batches;
s3, adding the extinction master batch prepared in the step S2 into a screw extruder, and carrying out melt blending and extrusion, wherein the temperatures of five regions of the screw extruder are 278 ℃, 281 ℃, 282 ℃, 284 ℃ and 285 ℃ respectively; then pumping into a spinning assembly through a metering pump, filtering, spinning through a spinning hole with the diameter of 0.15mm, cooling through circular blowing and side blowing, wherein the temperature of the circular blowing is 30 ℃, the temperature of the side blowing is 20 ℃, and the wind speed of the side blowing is 0.5 m/s;
and S4, oiling the cooled yarn through an oil mist nozzle, and then winding the yarn through a guide wheel and a winding head at the winding speed of 3600m/min to obtain the extinction POY yarn.
Preparation example 3 of matte POY yarn
The preparation method of the extinction POY comprises the following steps:
s1, removing impurities from polyester chips, heating and crystallizing at 160 ℃ for 15min, and then drying until the moisture content is not more than 0.1%;
s2, melting and blending the dried polyester chips, 2-hydroxy-4-n-octoxy benzophenone and titanium dioxide according to the mass ratio of 1000:1.2:15, extruding and granulating to obtain extinction master batches;
s3, adding the extinction master batch prepared in the step S2 into a screw extruder, and carrying out melt blending and extrusion, wherein the temperatures of five zones of the screw extruder are 277 ℃, 280 ℃, 282 ℃, 284 ℃ and 287 ℃ respectively; pumping into a spinning pack by a metering pump, filtering, spinning by a spinneret orifice with the diameter of 0.15mm, cooling by circular blowing and side blowing, wherein the temperature of circular blowing is 32 ℃, the temperature of side blowing is 18 ℃, and the wind speed of side blowing is 1 m/s;
and S4, oiling the cooled filaments through an oil mist nozzle, and then winding the filaments through a guide wheel and a winding head at the winding speed of 4200m/min to obtain the extinction POY filaments.
Preparation example 4 of matte POY yarn
In the preparation method of the extinction POY yarn in the preparation example, in the step S1, polyester chips are subjected to impurity removal, heated and crystallized at 170 ℃ for 10min, and then dried until the moisture content is not more than 0.1%; the others were the same as in preparation example 3 of the matte POY yarn.
Preparation example 5 of matte POY yarn
In the method for producing a matte POY yarn according to the present production example, the mass ratio of the polyester chips dried in step S2, 2-hydroxy-4-n-octoxy benzophenone, and titanium dioxide was 1000:2: 25. The others were the same as in preparation example 3 of the matte POY yarn.
Preparation example 6 of matte POY yarn
In the method for producing a matte POY yarn according to the present production example, the mass ratio of the polyester chips dried in step S2, 2-hydroxy-4-n-octoxy benzophenone, and titanium dioxide was 1000:1.8: 22. The others were the same as in preparation example 3 of the matte POY yarn.
Preparation example 7 of matte POY yarn
The difference between the preparation method of the delustered POY yarn of the preparation example and the preparation example 6 of the delustered POY yarn is that in step S2, dried polyester chips, 2-hydroxy-4-n-octoxy benzophenone, 1, 3-butanediol and titanium dioxide are melted and blended according to the mass ratio of 1000:1.8:3:22, extruded and granulated to prepare a delustered master batch. The others were the same as in preparation example 6 of the matte POY yarn.
Preparation example 8 of matte POY yarn
The difference between the preparation method of the delustered POY yarn of the preparation example and the preparation example 7 of the delustered POY yarn is that in step S2, dried polyester chips, 2-hydroxy-4-n-octoxy benzophenone, 1, 3-butanediol, SEBS particles, aluminum stearate and titanium dioxide are melted and blended according to the mass ratio of 1000:1.8:5:120:12:22, extruded and granulated to prepare a delustered master batch. The others were the same as in preparation example 7 of the matte POY yarn.
Preparation example 9 of matte POY yarn
The difference between the preparation method of the delustered POY filament and the preparation example 8 of the delustered POY filament is that in step S2, dried polyester chips, 2-hydroxy-4-n-octoxy benzophenone, 1, 3-butanediol, SEBS particles, aluminum stearate, diacylglycerol acyl serine phosphate, isopropyl tristearate and titanium dioxide are melted and blended according to the mass ratio of 1000:1.8:5:110:15:8:3:22, extruded and granulated to prepare a delustered master batch. The others were the same as in preparation example 8 of the matte POY yarn.
Example 1
The production method of the cotton-like yarn comprises the following steps:
1) leading the extinction POY yarns on the extinction POY raw yarn frame and the extinction FDY yarns on the extinction FDY raw yarn frame out of the corresponding raw yarn frame, combining the extinction POY yarns and the extinction FDY yarns, and then entering an auxiliary roller; the extinction POY yarn is the extinction POY yarn prepared in the preparation example 1 of the extinction POY yarn and has the specification of 55 dtex;
the extinction FDY yarn is full-extinction terylene FDY yarn with the specification of 111 dtex;
2) compounding the extinction POY yarns and the extinction FDY yarns passing through the auxiliary roller by a network device, and then passing through a first roller with the speed of 300 m/min; then passing through a deformation hot box (an upper hot box) to obtain a deformation processing wire; the temperature of the deformation hot box is 180 ℃, and the stretching ratio is 1.37; cooling the textured yarn by a cooling plate, and then passing through a false twister to obtain false twisted yarn; passing the false twist yarn through a second roller at a speed of 410 m/min;
3) then, the fiber is processed by a shaping hot box (lower hot box) to obtain a shaping processing wire; the temperature of the setting hot box is 140 ℃, and the stretching ratio is 1.2;
4) and the shaping treatment yarn passes through a third roller, then passes through a yarn detecting port, then is oiled by an oil tanker, and then is wound by a winding device to obtain the cotton-like yarn.
Example 2
The production method of the cotton-like yarn comprises the following steps:
1) leading the extinction POY filaments on the extinction POY raw filament frame and the extinction FDY filaments on the extinction FDY raw filament frame out of the corresponding raw filament frame, combining the extinction POY filaments and the extinction FDY filaments through a filament cutter, and then entering an auxiliary roller; the extinction POY yarn is the extinction POY yarn prepared in the preparation example 1 of the extinction POY yarn and has the specification of 55 dtex;
the extinction FDY yarn is full-extinction terylene FDY yarn with the specification of 111 dtex;
2) compounding the extinction POY yarns and the extinction FDY yarns passing through the auxiliary roller by a network device, and then passing through a first roller with the speed of 345 m/min; then passing through a deformation hot box (an upper hot box) to obtain a deformation processing wire; the temperature of the deformation hot box is 180 ℃, and the stretching ratio is 1.3; cooling the textured yarn by a cooling plate, and then passing through a false twister to obtain false twisted yarn; passing the false twist yarn through a second roller, wherein the speed of the second roller is 450 m/min;
3) then, the fiber is processed by a shaping hot box (lower hot box) to obtain a shaping processing wire; the temperature of the setting hot box is 140 ℃, and the stretching ratio is 1.1;
4) and the shaping treatment yarn passes through a third roller, then passes through a yarn detecting port, then is oiled by an oil tanker, and then is wound by a winding device to obtain the cotton-like yarn.
Example 3
In the production method of the cotton-like yarn of this example, the temperature of the shaping hot box in step 2) was 145 ℃, the temperature of the shaping hot box in step 3) was 130 ℃, and the rest was the same as in example 2.
Example 4
In the production method of the cotton-like yarn of this example, the temperature of the shaping hot box in step 2) was 165 ℃, the temperature of the shaping hot box in step 3) was 150 ℃, and the rest was the same as in example 2.
Examples 5 to 12
The cotton-like yarns of examples 5 to 12 were produced in the same manner as in example 2 except that the matte POY yarns were the matte POY yarns obtained in production examples 2 to 9, respectively, and the others were the same as in example 2.
Comparative example
The production method of the cotton-like yarn of the comparative example is different from that of example 1 in that 75D/72F POY polyester filament yarn provided by Zhejiang Shenglong textile technology Co., Ltd is used as delustering POY, and the rest is the same as that of example 1.
Performance test
The cotton-like yarns obtained in examples 1 to 12 and comparative example were tested for boiling water shrinkage according to the method in GB/T6505-.
TABLE 1 Properties of the cotton-like threads obtained in examples 1 to 12 and comparative example
According to the example 1 and the comparative example, and by combining the contents in the table, the boiling water shrinkage of the composite fiber (cotton-like yarn) produced by the cotton-like yarn production method is obviously improved, the stability of the cotton-like yarn is higher, and in addition, the prepared cotton-like yarn has high breaking strength and excellent comprehensive performance.
As can be seen from examples 1 and 6 in combination with the above table, the matte POY yarn of the present application also has improved stability of the finally obtained cotton-like yarn due to the optimized melt extrusion temperature during the production process, and can further improve the breaking strength of the cotton-like yarn.
According to the embodiment 10 and the embodiment 11 and the content in the table, the boiling water shrinkage of the cotton-like yarn is further reduced after the preparation raw material formula of the extinction POY yarn is optimized, and the prepared cotton-like yarn is higher in stability.
Claims (10)
1. The production method of the cotton-like silk is characterized by comprising the following steps:
1) compounding the extinction POY yarn and the extinction FDY yarn, and then carrying out deformation treatment and false twisting treatment to obtain false twisted yarn; the extinction POY yarns are extinction polyester POY yarns, and the extinction FDY yarns are extinction polyester FDY yarns; the stretching ratio during deformation treatment is 1.3-1.5;
2) carrying out heat setting treatment on the false-twisted yarn prepared in the step 1) to obtain a set-treated yarn;
3) oiling and winding the sizing treatment yarn prepared in the step 2) to obtain the cotton-like yarn.
2. The method as claimed in claim 1, wherein the deformation treatment is carried out at a temperature of 140-180 ℃.
3. The method as claimed in claim 2, wherein the heat setting treatment is carried out at a temperature of 130-150 ℃.
4. The process for producing imitation cotton yarn of claim 3, wherein the draw ratio in the heat-setting treatment is 1.1 to 1.3.
5. The process for producing cotton-like yarns according to any one of claims 1 to 4, wherein the matted POY yarns are produced by a process comprising the steps of:
s1, melting and blending polyester chips, a stabilizer and titanium dioxide, extruding and granulating to obtain extinction master batches; the mass ratio of the polyester chip to the stabilizer to the titanium dioxide is 1000:1-2: 12-25;
s2, melting and extruding the extinction master batch, spraying yarns, cooling, oiling and winding to obtain the extinction master batch; the winding speed is 3600-.
6. The method for producing cotton-like yarn according to claim 5, wherein 1, 3-butanediol is further added when the polyester chips, the stabilizer and the titanium dioxide are melt-blended in step S1, and the mass ratio of the 1, 3-butanediol to the polyester chips is 3-5: 1000.
7. The process of claim 6, wherein SEBS particles and aluminum stearate are added during the melt blending of the polyester chips, the stabilizer and the titanium dioxide in step S1, and the mass ratio of the SEBS particles, the aluminum stearate and the polyester chips is 110-120:12-15: 1000.
8. The process for producing imitation cotton silk according to claim 5, wherein the moisture mass fraction in the polyester chip in step S1 is not more than 0.01%.
9. The method as claimed in claim 5, wherein the temperature of the melt extrusion in step S2 is 275-290 ℃.
10. The method as claimed in claim 9, wherein the step S2 is performed by using a screw extruder, and the five-stage temperatures of the screw extruder are 276-.
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| CN114908452A (en) * | 2022-04-29 | 2022-08-16 | 浙江佳宝聚酯有限公司 | Preparation method of cotton-like fiber |
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