CN115058813A - Production method of bi-component polyester fiber wool-like yarn - Google Patents
Production method of bi-component polyester fiber wool-like yarn Download PDFInfo
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- CN115058813A CN115058813A CN202210581740.3A CN202210581740A CN115058813A CN 115058813 A CN115058813 A CN 115058813A CN 202210581740 A CN202210581740 A CN 202210581740A CN 115058813 A CN115058813 A CN 115058813A
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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
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
- D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
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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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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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
- 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
- D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
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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
- D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
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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
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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
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns
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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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- 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
- D02J3/00—Modifying the surface
- D02J3/02—Modifying the surface by abrading, scraping, scuffing, cutting, or nicking
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- 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
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
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- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention relates to the technical field of textile production, in particular to a production method of bi-component polyester fiber wool-like yarns. The method comprises the steps of melting and extruding PTT slices and PET slices, then mixing a PTT melt and the PET melt, and ejecting the mixed melt from a spinneret plate to form a parallel bi-component nascent polyester fiber filament; then the double-component nascent polyester fiber is sequentially subjected to false twist texturing treatment and air texturing treatment, and finally the polyester fiber wool-like yarn with the excellent characteristics of both polyester fiber and wool is obtained. The bicomponent polyester fiber wool-like yarn produced by the invention has the advantages of good PTT fiber strength, good elasticity, soft hand feeling, easy dyeing and the like, and reduces the production cost to a certain extent along with the addition of the PET fiber.
Description
Technical Field
The invention relates to the technical field of textile production, in particular to a production method of bi-component polyester fiber wool-like yarns.
Background
With the continuous improvement of the scientific and technical level, the weaving level and the types of textiles are more and more, and the research on novel chemical fiber simulation fibers is more and more deep, wherein the wool-like fibers are one of the large types of simulation fibers.
The composite spinning is carried out by selecting the bi-component or multi-component synthetic fibers, so that the yarn has the advantages of multiple synthetic fibers, the defects caused by spinning of single fiber are overcome, and some natural fibers can be simulated or replaced by a certain processing method. Polyester fiber (PET) is commonly called as terylene, is the first large variety in the current synthetic fiber products, has better performance than wool in the aspects of strength, elasticity, wrinkle resistance, wear resistance and the like, and has lower production cost; the novel polyester fiber PTT fiber has the excellent characteristics of terylene, chinlon and acrylon, is rich in elasticity, soft in hand feeling and easy to dye; the high-shrinkage polyester fiber is a modified polyester fiber subjected to heat treatment, has the shrinkage rate of 70 percent, and has good dyeability and anti-pilling performance. The fibers are blended with other synthetic fibers and can be processed into wool-like yarns with soft hand feeling.
At present, Chinese patent with the patent application number of CN201910573878.7 discloses a production method of wool-like yarns, which comprises the steps of firstly mixing 65% of high-shrinkage terylene with 35% of viscose fiber drawing, and then sequentially carrying out roving processing and spinning processing to obtain the wool-like yarns. Although the yarn produced by the production method has good elasticity, is fluffy and full and has strong wool-shaped feeling, the processing technology is complex and the production cost is high. Chinese patent application No. CN201010174972.4 discloses a method for preparing a novel wool-like differential fiber, which comprises subjecting pre-oriented yarn prepared from PTT as a raw material to draw false twisting, and subjecting the pre-oriented yarn and fully-drawn high-boiling water shrinkable yarn prepared from modified high-shrinkage polyester as a raw material to network compounding by using a network device to obtain a composite wool-like yarn. Although the properties, particularly the elasticity, of the wool-like yarn produced by this production method are very close to those of wool fibers, the wool-like feeling is not strong.
Disclosure of Invention
The application aims at the defects in the prior art and provides a production method of the bi-component polyester fiber wool-like yarn, the bi-component polyester fiber filament is prepared in a melting and compounding mode, then the prepared bi-component polyester fiber filament is subjected to false twist deformation treatment and air deformation treatment at the same time, and the finally obtained polyester fiber wool-like yarn has the excellent characteristics of polyester fiber and wool, namely, the yarn is soft in hand feeling, has strong wool-shaped feeling and is easy to dye, and has good strength, elasticity and wear resistance.
The technical scheme adopted by the invention is as follows:
a production method of bi-component polyester fiber wool-like yarns comprises the following steps:
(1) selecting a PTT slice and a PET slice as raw materials, respectively placing the PTT slice and the PET slice into a first slice hopper and a second slice hopper, feeding the PTT slice at the discharge end of the first slice hopper into a first screw extruder for melt extrusion, and feeding the PET slice at the discharge end of the second slice hopper into a second screw extruder for melt extrusion;
(2) feeding the extruded PTT melt into a first metering pump for metering, feeding the extruded PET melt into a second metering pump for metering, inputting the PTT melt and the PET melt into a composite spinning assembly according to a certain mass ratio, mixing the PTT melt and the PET melt by the composite spinning assembly, and ejecting the completely mixed melt from a spinneret plate to form a parallel bi-component nascent polyester fiber filament;
(3) cooling the bicomponent nascent polyester fiber filaments sprayed out of the spinneret plate by a cooling air blowing system, guiding the filaments by a yarn guide disc, and then feeding the filaments into a false twist texturing device for false twist texturing treatment to obtain fluffy and elastic bicomponent polyester fiber filaments;
(4) leading the double-component polyester fiber filament subjected to false twist texturing into a wetting device of an air texturing machine through a yarn guide disc, carrying out water spraying wetting on the double-component polyester fiber filament by the wetting device, increasing the texturing effect of the double-component polyester fiber filament, improving the uniformity and stability of the double-component polyester fiber filament, leading the wetted double-component polyester fiber filament into a nozzle of the air texturing machine, arranging an air baffle at the outlet of the nozzle, blowing compressed air into the nozzle by a compressed air system, carrying out jet processing on the fiber filament, blowing the fiber filament to be dispersed and forming fluffy loops and arcs so as to prepare the soft and fluffy air textured filament with a plurality of loops and arcs on the surface, leading the prepared air textured filament into a sanding brushing device for sanding brushing, and preparing the wool-feel enhanced double-component polyester fiber wool-like yarn;
(5) the two-component polyester fiber wool-like yarns subjected to the sanding and brushing treatment are guided into a heat setting device by a godet for heat setting treatment, the internal stress generated during yarn deformation is eliminated by the heat setting treatment, the wool-like feeling on the surface of the yarns is enhanced, the dimensional stability is improved, and the two-component polyester fiber wool-like yarns subjected to the heat setting treatment are wound by a winding drum.
Further, the intrinsic viscosity range of the PTT slices is 0.6-1.3 dL/g, and the intrinsic viscosity range of the PET slices is 0.5-0.7 dL/g.
Further, the mass ratio of the PTT slices to the PET slices is 30-70: 70-30.
Further, the PTT slices enter a first slice dryer through a first slice hopper for drying, the dried PTT slices enter a first screw extruder from the discharge end of the first slice dryer for melt extrusion, the PET slices enter a second slice dryer through a second slice hopper for drying, and the dried PET slices enter the second screw extruder from the discharge end of the second slice dryer for melt extrusion.
Further, PTT melt extruded from the first screw extruder is conveyed to a first filtering device through a melt pipeline for filtering, impurities in the PTT melt are removed through filtering, the filtered PTT melt is conveyed to a first metering pump for metering, PET melt extruded from the second screw extruder is conveyed to a second filtering device through a melt pipeline for filtering, the impurities in the PET melt are removed through filtering, and the filtered PET melt is conveyed to a second metering pump for metering.
And further, cooling the double-component nascent polyester fiber filaments, oiling the cooled double-component nascent polyester fiber filaments by an oil tanker, and guiding the oiled double-component nascent polyester fiber filaments into a false-twist texturing device through a yarn guide disc to carry out false-twist texturing treatment.
Further, the false twist texturing treatment comprises the following specific flow: the two ends of the bi-component primary polyester fiber filament entering the false twist texturing device are respectively held by a first yarn holder and a second yarn holder, a false twister arranged between the first yarn holder and the second yarn holder twists the bi-component primary polyester fiber filament at the two ends with the twist degree of 88 twist/10 cm and the twist direction opposite to each other, the rotating speed n of the false twister is 4000-10000 r/min, after the twisting is finished, the bi-component polyester fiber filament is subjected to heat setting treatment by an infrared heating pipe, the temperature range of the heat setting is 180-200 ℃, the time range of the heat setting is 18-22 s, the infrared heating pipe is controlled by a power switch, a power transformer and a temperature controller to work, after the heat setting treatment is finished, the bi-component polyester fiber filament is cooled by a cooling blowing system, the cooled bi-component polyester fiber filament is untwisted by the false twister, obtaining the fluffy and elastic bicomponent polyester fiber filament.
Further, the bicomponent polyester fiber filament after the false twist texturing treatment is led into a wetting device of an air texturing machine through a yarn guide disc, the wetting device sprays water on the bicomponent polyester fiber filament to wet, the texturing effect of the bicomponent polyester fiber filament is increased, the uniformity and the stability of the bicomponent polyester fiber filament are improved, then the wetted bicomponent polyester fiber filament is led into a nozzle of the air texturing machine, and a compressed air system blows compressed air into the nozzle to carry out air texturing on the filaments.
Further, the specific flow of the wool-type enhancing treatment is as follows: the air textured yarn is ground in leading-in first friction roller and the second friction roller in proper order through the godet and is handled, and first friction roller and second friction roller turn to opposite, then leads to the brush hair roller through the godet and carry out the brush hair processing again, at the mill hair brush hair in-process, uses air-blower and air exhauster will drop fine hair suction fine hair filter bag.
Further, when the heat setting treatment is carried out on the double-component polyester fiber wool-like yarns subjected to the sanding and brushing treatment, the double-component polyester fiber wool-like yarns are subjected to heat setting through an infrared heating pipe, the heat setting temperature range is 180-200 ℃, and the setting time range is 18-22 s.
The invention has the following beneficial effects:
the produced bi-component polyester fiber wool-like yarn is prepared by melting and compounding the novel polyester fiber PTT fiber and PET fiber which have excellent characteristics of terylene, chinlon, acrylic fiber and the like, compared with the traditional twisting and compounding, the melting and compounding process has no volatilization of solvent, is more environment-friendly, and can prepare fiber filaments with smooth and uniform surfaces and high performance; the false twist texturing treatment and the air texturing treatment are simultaneously carried out on the prepared bicomponent polyester fiber filament to obtain the wool-like yarn, the fluffy and elastic bicomponent polyester fiber filament can be obtained through the false twist texturing treatment, and the air texturing treatment can be used for preparing the soft and fluffy air textured yarn with a plurality of yarn loops and yarn arcs on the surface, so that the wool-like yarn not only has the performance characteristics of wool fiber, but also has stronger wool shape feeling; the method guides the bicomponent polyester fiber filaments subjected to the false twist texturing treatment into the wetting device for water spraying and wetting, increases the texturing effect of the bicomponent polyester fiber filaments, improves the uniformity and stability of the bicomponent polyester fiber filaments, and enables the effect of subsequent air texturing treatment to be better; the air textured yarn is led into a sanding brushing device for sanding brushing treatment, so that the bicomponent polyester fiber wool-like yarn with enhanced wool feeling can be prepared; the bi-component polyester fiber wool-like yarn is subjected to heat setting treatment after the sanding and brushing treatment, and the heat setting treatment eliminates internal stress generated when the yarn is deformed, enhances the wool-like feeling of the surface of the yarn and improves the dimensional stability; the bicomponent polyester fiber wool-like yarn produced by the invention has the advantages of good PTT fiber strength, good elasticity, soft hand feeling, easy dyeing and the like, and reduces the production cost to a certain extent along with the addition of the PET fiber.
Drawings
FIG. 1 is a flow chart of the production process of the present invention.
FIG. 2 is a view showing an internal structure of a false twist texturing apparatus of the present invention.
Fig. 3 is an internal structure view of the sanding bristle device of the present invention.
Wherein: 1. a first slicing hopper; 2. a second slicing hopper; 3. a first slice dryer; 4. a second slice dryer; 5. a first screw extruder; 6. a second screw extruder; 7. a first filtration device; 8. a second filtering device; 9. a first metering pump; 10. a second metering pump; 11. compounding a spinning assembly; 12. a cooling blower system; 13. an oil tanker; 14. a godet; 15. a false twist texturing device; 151. a power switch; 152. a power transformer; 153. a power transformer; 154. an infrared heating pipe; 155. a first yarn holder; 156. a false twister; 157. a second yarn holder; 158. a cooling blower system; 16. a humidifying device; 17. a nozzle; 18. a compressed air system; 19. a gas baffle; 20. a sanding brushing device; 201. a blower; 202. a first rubbing roller; 203. a second rubbing roller; 204. a brushing roller; 205. an exhaust fan; 206. a fluff filter bag; 21. a heat setting device; 22. and (4) winding the bobbin.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
The first embodiment is as follows: a production method of bi-component polyester fiber wool-like yarns selects PTT slices with the intrinsic viscosity of 0.9dL/g and PET slices with the intrinsic viscosity of 0.5dL/g as raw materials.
According to the process flow shown in fig. 1, a PTT chip with the intrinsic viscosity of 0.9dL/g and a PET chip with the intrinsic viscosity of 0.5dL/g are respectively placed in a first chip hopper 1 and a second chip hopper 2, the PTT chip enters a first chip dryer 3 through the first chip hopper 1 for drying, and the PET chip enters a second chip dryer 4 through the second chip hopper 2 for drying. The purpose of drying is to remove moisture from the PTT and PET chips and to increase the crystallinity and softening point of the chips. If the section is not dried, the section is influenced by high temperature, moisture and oxygen in the melting process, so that the polymer is subjected to chemical reactions such as degradation, reunion and gelation, the molecular weight is reduced, the color of the fiber is yellowed, the strength is reduced, bubble filaments are generated, and the subsequent spinning is difficult.
The dried PTT slices enter a first screw extruder 5 from the discharge end of a first slice dryer 3 for melt extrusion, the extruded PTT melt is conveyed to a first filtering device 7 through a melt pipeline for filtering, impurities in the PTT melt are removed by filtering, and the filtered PTT melt is conveyed to a first metering pump 9 for metering. And the dried PET slices enter a second screw extruder 6 from the discharge end of a second slice dryer 4 for melt extrusion, the extruded PET melt is conveyed to a second filtering device 8 through a melt pipeline for filtering, impurities in the PET melt are removed through filtering, and the filtered PTT melt is conveyed to a second metering pump 10 for metering. The filtering device can remove impurities and particles which are not melted in the melt, improves the spinning performance of the melt, ensures the quality of yarns, and can cause the consequences that a spinneret plate is blocked and fiber filaments are easy to break if the melt is not filtered.
The PTT melt and the PET melt are input into a composite spinning component 11 according to the mass ratio of the PTT to the PET being 30:70, the PTT melt and the PET melt are mixed by the composite spinning component 11, and the completely mixed melt is sprayed out from a spinneret plate to form a side-by-side bi-component nascent polyester fiber filament. Wherein the melt spinning temperature of the PTT slices is 245 ℃, and the melt spinning temperature of the PET slices is 275 ℃.
Compared with the traditional twisting compounding, the melting compounding has no volatilization of solvent, is more environment-friendly, and can prepare the fiber filament with smooth and uniform surface and high performance.
The double-component nascent polyester fiber filaments sprayed from the spinneret plate are cooled by a cooling and blowing system 12 and oiled by an oil tanker 13, the cooling process is a forming and shaping process, the fibers enter a glass state and are solidified, the solidified fibers are dry and loose and are easy to generate static electricity, so the fibers need to be oiled, the oiling treatment not only can enable the fibers to have better cohesion, smoothness, elasticity and antistatic property, but also can improve the spinning performance of the fibers, and the dyeing uniformity and post-processing performance of the fibers are ensured. The oiled bicomponent nascent polyester fiber filament is guided by a yarn guide disc 14 to enter a false twist texturing device 15 for false twist texturing treatment, and the fluffy and elastic bicomponent polyester fiber filament is obtained.
As shown in FIG. 2, the false twist texturing process comprises the following specific steps: the two ends of the bicomponent primary polyester fiber filament entering the false twist texturing device 15 are respectively held by a first yarn holder 155 and a second yarn holder 157, a false twister 156 arranged between the first yarn holder 155 and the second yarn holder 157 carries out twisting treatment with the twist degree of 88 twist/10 cm and the twist direction opposite to that of the bicomponent primary polyester fiber filament at the two ends, and the rotating speed n of the twisting treatment carried out by the false twister 156 is 4000 r/min. After the twisting process is finished, the bi-component polyester fiber filaments are subjected to heat setting treatment through an infrared heating pipe 154, wherein the heat setting temperature is 180 ℃, and the setting time is 18 s. The infrared heating pipe 154 is controlled by the power switch 151, the power transformer 152 and the temperature controller 153. After the heat-setting process is completed, the bicomponent polyester fiber filaments are cooled by a cooling blower system 158. The cooled bicomponent polyester fiber filaments are untwisted by the false twister 156 to obtain fluffy and elastic bicomponent polyester fiber filaments.
The double-component polyester fiber filament after the false twist texturing treatment is guided into a wetting device 16 of an air texturing machine through a yarn guide disc, the wetting device 16 sprays water on the double-component polyester fiber filament for wetting, the texturing effect of the double-component polyester fiber filament is improved, and the uniformity and the stability of the double-component polyester fiber filament are improved. The wet bicomponent polyester fiber filament enters a nozzle 17 of an air texturing machine, an air baffle plate 19 is arranged at the outlet position of the nozzle 17, a compressed air system 18 blows compressed air into the nozzle 17, and the fiber filament is subjected to spray treatment to be blown apart and form fluffy loops and arcs, so that the soft and fluffy air textured filament with a plurality of loops and arcs on the surface is prepared. The obtained air textured yarn is introduced into a sanding brushing device 20 for sanding brushing treatment to obtain the bicomponent polyester fiber wool-like yarn with enhanced wool feeling.
As shown in fig. 3, the specific flow of the enhanced wool type treatment is as follows: the air textured yarn is guided into a first friction roller 202 and a second friction roller 203 in sequence through a godet for sanding treatment, the first friction roller 202 and the second friction roller 203 are reversely rotated, and then the air textured yarn is guided into a brushing roller 204 through the godet for brushing treatment. In the sanding process, falling down pile is sucked into a pile filter bag 206 using a blower 201 and a suction fan 205.
The two-component polyester fiber wool-like yarn subjected to the sanding and brushing treatment is guided into a heat setting device 21 by a godet for heat setting treatment, and the heat setting treatment eliminates internal stress generated when the yarn is deformed, thereby enhancing the wool shape feeling of the yarn surface and improving the dimensional stability. The bicomponent polyester fiber wool-like yarn after the heat setting treatment is wound by a winding drum 22. During heat setting treatment, the bi-component polyester fiber wool-like yarns are heated and set through an infrared heating pipe, wherein the heat setting temperature is 180 ℃, and the setting time is 18 s.
The second embodiment: a production method of bi-component polyester fiber wool-like yarns selects PTT slices with the intrinsic viscosity of 1.1dL/g and PET slices with the intrinsic viscosity of 0.6dL/g as raw materials.
According to the process flow shown in fig. 1, a PTT chip with an intrinsic viscosity of 1.1dL/g and a PET chip with an intrinsic viscosity of 0.6dL/g are respectively placed in a first chip hopper 1 and a second chip hopper 2, the PTT chip enters a first chip dryer 3 through the first chip hopper 1 for drying, and the PET chip enters a second chip dryer 4 through the second chip hopper 2 for drying. The purpose of drying is to remove moisture and to increase the crystallinity and softening point of the chips. If the section is not dried, the section is influenced by high temperature, moisture and oxygen in the melting process, so that the polymer is subjected to chemical reactions such as degradation, reunion and gelation, the molecular weight is reduced, the color of the fiber is yellowed, the strength is reduced, bubble filaments are generated, and the subsequent spinning is difficult.
The dried PTT slices enter a first screw extruder 5 from the discharge end of a first slice dryer 3 for melt extrusion, the extruded PTT melt is conveyed to a first filtering device 7 through a melt pipeline for filtering, impurities in the PTT melt are removed by filtering, and the filtered PTT melt is conveyed to a first metering pump 9 for metering. The dried PET slices enter a second screw extruder 6 from the discharge end of a second slice dryer 4 for melt extrusion, the extruded PET melt is conveyed to a second filtering device 8 through a melt pipeline for filtering, impurities in the PET melt are removed through filtering, and the filtered PET melt is conveyed to a second metering pump 10 for metering.
The PTT melt and the PET melt are input into a composite spinning component 11 according to the mass ratio of the PTT to the PET of 50:50, the PTT melt and the PET melt are mixed by the composite spinning component 11, and the mixed melt is sprayed out from a spinneret plate to form a side-by-side bi-component nascent polyester fiber filament. Wherein the melt spinning temperature of the PTT slices is 250 ℃, and the melt spinning temperature of the PET slices is 280 ℃.
The double-component nascent polyester fiber filaments sprayed from the spinneret plate are cooled by a cooling and blowing system 12 and oiled by an oil tanker 13, the cooling process is a forming and shaping process, the fibers enter a glass state and are solidified, the solidified fibers are dry and loose and are easy to generate static electricity, so the fibers need to be oiled, the oiling treatment not only can enable the fibers to have better cohesion, smoothness, elasticity and antistatic property, but also can improve the spinning performance of the fibers, and the dyeing uniformity and post-processing performance of the fibers are ensured. The filaments of the oiled bicomponent as-spun polyester are guided by a godet 14 into a false twist texturing device 15 for false twist texturing.
As shown in FIG. 2, the false twist texturing process comprises the following specific steps: the two ends of the double-component primary polyester fiber filament entering the false twist texturing device 15 are respectively held by a first yarn holder 155 and a second yarn holder 157, a false twister 156 arranged between the first yarn holder 155 and the second yarn holder 157 carries out twisting treatment on the double-component primary polyester fiber filament at the two ends, wherein the twist degree is 88 twist/10 cm, the twist direction is opposite, and the rotating speed n of the false twister 156 for twisting treatment is 7000 r/min. After the twisting process, the bi-component polyester fiber filaments are subjected to heat setting treatment through an infrared heating pipe 154, wherein the heat setting temperature is 180 ℃, and the setting time is 20 s. The infrared heating pipe 154 is controlled by the power switch 151, the power transformer 152 and the temperature controller 153. After the heat-setting process is completed, the bicomponent polyester fiber filaments are cooled by a cooling blower system 158. The cooled bicomponent polyester fiber filaments are untwisted by the false twister 156 to obtain fluffy and elastic bicomponent polyester fiber filaments.
The double-component polyester fiber filament after the false twist texturing treatment is guided into a wetting device 16 of an air texturing machine through a yarn guide disc, the wetting device 16 sprays water on the double-component polyester fiber filament for wetting, the texturing effect of the double-component polyester fiber filament is improved, and the uniformity and the stability of the double-component polyester fiber filament are improved. The wet bicomponent polyester fiber filament enters a nozzle 17 of an air texturing machine, an air baffle plate 19 is arranged at the outlet position of the nozzle 17, a compressed air system 18 blows compressed air into the nozzle 17, and the fiber filament is subjected to spray treatment to be blown apart and form fluffy loops and arcs, so that the soft and fluffy air textured filament with a plurality of loops and arcs on the surface is prepared. The obtained air textured yarn is led into a sanding brushing device 20 for sanding brushing treatment to obtain the bicomponent polyester fiber wool-like yarn with enhanced wool feeling.
As shown in fig. 3, the specific flow of the enhanced wool type treatment is as follows: the air textured yarn is guided into a first friction roller 202 and a second friction roller 203 in sequence through a godet for sanding treatment, the first friction roller 202 and the second friction roller 203 are reversely rotated, and then the air textured yarn is guided into a brushing roller 204 through the godet for brushing treatment. In the sanding process, falling down lint is sucked into the lint filter bag 206 using the blower 201 and the suction fan 205.
The two-component polyester fiber wool-like yarn subjected to the sanding and brushing treatment is guided into a heat setting device 21 by a godet for heat setting treatment, and the heat setting treatment eliminates internal stress generated when the yarn is deformed, thereby enhancing the wool shape feeling of the yarn surface and improving the dimensional stability. The bi-component polyester fiber wool-like yarn after the heat setting treatment is wound by the winding drum 22, and finally the bi-component polyester fiber wool-like yarn coil material with the performance characteristics of wool fiber and stronger wool-type feeling is obtained. During heat setting treatment, the bi-component polyester fiber wool-like yarns are heated and set through an infrared heating pipe, wherein the heat setting temperature is 190 ℃ and the setting time is 20 s.
Example three: a production method of bi-component polyester fiber wool-like yarns selects PTT slices with the intrinsic viscosity of 1.3dL/g and PET slices with the intrinsic viscosity of 0.7dL/g as raw materials.
According to the process flow shown in FIG. 1, PTT chips having an intrinsic viscosity of 1.3dL/g and PET chips having an intrinsic viscosity of 0.7dL/g were placed in a first chip hopper 1 and a second chip hopper 2, respectively.
The PTT slices at the discharge end of the first slice hopper 1 enter a first screw extruder 5 for melt extrusion, and the extruded PTT melt is sent to a first metering pump 9 for metering. PET slices at the discharge end of the second slice hopper 2 enter a second screw extruder 6 for melt extrusion, and the extruded PET melt is fed into a second metering pump 10 for metering.
The PTT melt and the PET melt are input into a composite spinning component 11 according to the mass ratio of PTT to PET being 70:30, the PTT melt and the PET melt are mixed by the composite spinning component 11, and the mixed melt is sprayed out from a spinneret plate to form the parallel bi-component as-spun polyester fiber filament. Wherein the melt spinning temperature of the PTT slices is 260 ℃, and the melt spinning temperature of the PET slices is 290 ℃.
The bicomponent nascent polyester fiber filaments ejected from the spinneret are cooled by a cooling air blowing system 12 and oiled by an oil tanker 13, and the oiled bicomponent nascent polyester fiber filaments are guided by a yarn guide 14 to enter a false twist texturing device 15 for false twist texturing treatment.
As shown in FIG. 2, the specific flow of the false twist texturing: the two ends of the double-component primary polyester fiber filament entering the false twist texturing device 15 are respectively held by a first yarn holder 155 and a second yarn holder 157, a false twister 156 arranged between the first yarn holder 155 and the second yarn holder 157 carries out twisting treatment on the double-component primary polyester fiber filament at the two ends, wherein the twist degree is 88 twist/10 cm, the twist direction is opposite, and the rotating speed n of the false twister 156 for twisting treatment is 10000 r/min. After the twisting process, the bi-component polyester fiber filaments are subjected to heat setting treatment by an infrared heating pipe 154, wherein the heat setting temperature is 200 ℃ and the setting time is 22 s. The infrared heating tube 154 is controlled by the power switch 151, the power transformer 152 and the temperature controller 153. After the heat-setting process is completed, the bicomponent polyester fiber filaments are cooled by a cooling blower system 158. The cooled bicomponent polyester fiber filaments are untwisted by the false twister 156 to obtain fluffy and elastic bicomponent polyester fiber filaments.
The double-component polyester fiber filament after false twist texturing is led into a nozzle 17 of an air texturing machine through a yarn guide disc, an air baffle plate 19 is arranged at the outlet position of the nozzle 17, a compressed air system 18 blows compressed air into the nozzle 17, and the fiber filament is sprayed to be blown away and form fluffy filament rings and filament arcs, so that the soft and fluffy air textured filament with a plurality of filament rings and filament arcs on the surface is prepared. The obtained air textured yarn is led into a sanding brushing device 20 for sanding brushing treatment to obtain the bicomponent polyester fiber wool-like yarn with enhanced wool feeling.
As shown in fig. 3, the specific flow of the enhanced wool type treatment is as follows: the air textured yarn is guided into a first friction roller 202 and a second friction roller 203 in sequence through a godet for sanding treatment, the first friction roller 202 and the second friction roller 203 are reversely rotated, and then the air textured yarn is guided into a brushing roller 204 through the godet for brushing treatment. In the sanding process, falling down lint is sucked into the lint filter bag 206 using the blower 201 and the suction fan 205.
The two-component polyester fiber wool-like yarn subjected to the sanding and brushing treatment is guided into a heat setting device 21 by a godet for heat setting treatment, and the internal stress generated when the yarn is deformed is eliminated by the heat setting treatment, so that the wool-like feeling on the surface of the yarn is enhanced, and the dimensional stability is improved. The bi-component polyester fiber wool-like yarn after the heat setting treatment is wound by the winding drum 22, and finally the bi-component polyester fiber wool-like yarn coil material with the performance characteristics of wool fiber and stronger wool-type feeling is obtained. During heat setting treatment, the bi-component polyester fiber wool-like yarns are heated and set through an infrared heating pipe, wherein the heat setting temperature is 200 ℃, and the setting time is 22 s.
The double-component polyester fiber wool-like yarn produced by the invention is a parallel double-component nascent polyester fiber filament which is formed by carrying out composite spinning on a PTT slice and a PET slice with good compatibility, then the filament is cooled, oiled and then false twisted and deformed by a false twister to obtain the double-component polyester fiber filament, the prepared filament bundle is fed into a nozzle of an air texturing machine to ensure that the filament is changed into soft and fluffy air textured yarn with a plurality of loops, arcs and the like on the surface, and then the air textured yarn is subjected to sanding and brushing treatment and then is subjected to heat setting to obtain the double-component polyester fiber wool-like yarn similar to short fiber yarn.
The bi-component polyester fiber wool-like yarn produced by the invention is compounded by novel polyester fiber PTT fiber and PET fiber which have excellent characteristics of terylene, chinlon, acrylon and the like, and the bi-component polyester fiber wool-like yarn reduces the production cost to a certain extent along with the addition of the PET fiber on the basis of having the functions of good strength, good elasticity, soft hand feeling, easy dyeing and the like. The wool-like yarn obtained by simultaneously carrying out false twist texturing treatment and air texturing treatment on the prepared bicomponent polyester fiber filament has the performance characteristics of wool fiber and has stronger wool shape feeling.
The above description is intended to be illustrative, and not restrictive, the scope of the invention being indicated by the claims, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A production method of bi-component polyester fiber wool-like yarns is characterized by comprising the following steps: the method comprises the following steps:
(1) selecting PTT slices and PET slices as raw materials, respectively placing the PTT slices and the PET slices into a first slice hopper (1) and a second slice hopper (2), wherein the PTT slices at the discharge end of the first slice hopper (1) enter a first screw extruder (5) for melt extrusion, and the PET slices at the discharge end of the second slice hopper (2) enter a second screw extruder (6) for melt extrusion;
(2) feeding the extruded PTT melt into a first metering pump (9) for metering, feeding the extruded PET melt into a second metering pump (10) for metering, inputting the PTT melt and the PET melt into a composite spinning component (11) according to a certain mass ratio, mixing the PTT melt and the PET melt by the composite spinning component (11), and ejecting the completely mixed melt from a spinneret plate to form a parallel bi-component nascent polyester fiber filament;
(3) the bicomponent nascent polyester fiber filaments sprayed out of the spinneret plate are cooled by a cooling air blowing system (12) and then guided by a yarn guide disc (14) to enter a false twist texturing device (15) for false twist texturing treatment, so that fluffy and elastic bicomponent polyester fiber filaments are obtained;
(4) the double-component polyester fiber filament after the false twist texturing treatment is led into a wetting device (16) of an air texturing machine through a yarn guide disc, the wetting device (16) sprays water to the double-component polyester fiber filament to wet the double-component polyester fiber filament, the texturing effect of the double-component polyester fiber filament is increased, the uniformity and the stability of the double-component polyester fiber filament are improved, the wetted double-component polyester fiber filament enters a nozzle (17) of the air texturing machine, an air baffle plate (19) is arranged at the outlet position of the nozzle (17), a compressed air system (18) blows compressed air into the nozzle (17) to spray the fiber filament, the fiber filament is blown away and forms fluffy yarn rings and yarn arcs, so that the soft and fluffy air textured filament with a plurality of yarn rings and yarn arcs on the surface is manufactured, the manufactured air textured filament is led into a sanding brushing device (20) to be sanded and brushed, preparing the wool-like feeling enhanced bi-component polyester fiber wool-like yarn;
(5) the two-component polyester fiber wool-like yarns subjected to the sanding and brushing treatment are guided into a heat setting device (21) by a godet for heat setting treatment, the internal stress generated during yarn deformation is eliminated by the heat setting treatment, the wool-like feeling on the surface of the yarns is enhanced, the dimensional stability is improved, and the two-component polyester fiber wool-like yarns subjected to the heat setting treatment are wound by a winding drum (22).
2. The method of claim 1, wherein the method comprises the steps of: the intrinsic viscosity range of the PTT slices is 0.6-1.3 dL/g, and the intrinsic viscosity range of the PET slices is 0.5-0.7 dL/g.
3. The method of claim 2, wherein the step of producing a bicomponent polyester fiber wool-like yarn comprises: the mass ratio of the PTT slices to the PET slices is 30-70: 70-30.
4. The method of claim 3, wherein the step of producing a bicomponent polyester fiber wool-like yarn comprises: the PTT slices enter a first slice dryer (3) through a first slice hopper (1) for drying, the dried PTT slices enter a first screw extruder (5) from the discharge end of the first slice dryer (3) for melt extrusion, the PET slices enter a second slice dryer (4) through a second slice hopper (2) for drying, and the dried PET slices enter a second screw extruder (6) from the discharge end of the second slice dryer (4) for melt extrusion.
5. The method of claim 4, wherein the step of producing a bicomponent polyester fiber wool-like yarn comprises: the PTT melt extruded from the first screw extruder (5) is conveyed into a first filtering device (7) through a melt pipeline to be filtered, impurities in the PTT melt are removed through filtering, the filtered PTT melt is conveyed into a first metering pump (9) to be metered, the PET melt extruded from the second screw extruder (6) is conveyed into a second filtering device (8) through a melt pipeline to be filtered, the impurities in the PET melt are removed through filtering, and the filtered PET melt is conveyed into a second metering pump (10) to be metered.
6. The method of claim 5, wherein the step of producing a bicomponent polyester fiber wool-like yarn comprises: the double-component primary polyester fiber filaments are cooled and then oiled by an oil tanker (13), and the oiled double-component primary polyester fiber filaments are guided by a yarn guide disc (14) to enter a false twist texturing device (15) for false twist texturing treatment.
7. The method of claim 6, wherein the step of producing a bicomponent polyester fiber wool-like yarn comprises: the false twist texturing treatment process comprises the following specific steps: the two ends of the double-component primary polyester fiber filament entering the false twist texturing device (15) are respectively held by a first yarn holder (155) and a second yarn holder (157), a false twister (156) arranged between the first yarn holder (155) and the second yarn holder (157) twists the double-component primary polyester fiber filament at the two ends with the twist degree of 88 twist/10 cm and the twist direction opposite to each other, the rotating speed n of the false twister (156) is 4000-10000 r/min, after the twisting treatment is finished, the double-component primary polyester fiber filament is subjected to heat setting treatment by an infrared heating pipe (154), the temperature range of the heat setting is 180-200 ℃, the time range of the heat setting is 18-22 s, the infrared heating pipe (154) is controlled by a power switch (151), a power transformer (152) and a temperature controller (153) to work, after the heat setting treatment is finished, the double-component primary polyester fiber filament is cooled by a cooling air blowing system (158), the cooled bicomponent polyester fiber filaments are untwisted by a false twister (156) to obtain fluffy and elastic bicomponent polyester fiber filaments.
8. The method of claim 7, wherein the step of producing a bicomponent polyester fiber wool-like yarn comprises: the double-component polyester fiber filament subjected to false twist texturing is guided into a wetting device (16) of an air texturing machine through a godet, the wetting device (16) sprays water on the double-component polyester fiber filament to wet the double-component polyester fiber filament, the texturing effect of the double-component polyester fiber filament is increased, the uniformity and the stability of the double-component polyester fiber filament are improved, then the wet double-component polyester fiber filament is guided into a nozzle (17) of the air texturing machine, and a compressed air system (18) blows compressed air into the nozzle (17) to carry out air texturing on the wet double-component polyester fiber filament.
9. The method for producing a bicomponent polyester fiber wool-like yarn according to claim 8, wherein: the specific process of the reinforced wool type treatment comprises the following steps: the air textured yarn is sequentially guided into a first friction roller (202) and a second friction roller (203) through a godet for sanding treatment, the rotation directions of the first friction roller (202) and the second friction roller (203) are opposite, then the air textured yarn is guided into a brushing roller (204) through the godet for brushing treatment, and in the sanding brushing process, falling down fluff is sucked into a fluff filter bag (206) through an air blower (201) and an exhaust fan (205).
10. The method of claim 9, wherein the step of producing a bicomponent polyester fiber wool-like yarn comprises: when the heat setting treatment is carried out on the two-component polyester fiber wool-like yarns subjected to the sanding and brushing treatment, the two-component polyester fiber wool-like yarns are subjected to heat setting through an infrared heating pipe, the heat setting temperature range is 180-200 ℃, and the setting time range is 18-22 s.
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