CN110923835A - Preparation process of moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn - Google Patents
Preparation process of moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn Download PDFInfo
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- CN110923835A CN110923835A CN201911339998.7A CN201911339998A CN110923835A CN 110923835 A CN110923835 A CN 110923835A CN 201911339998 A CN201911339998 A CN 201911339998A CN 110923835 A CN110923835 A CN 110923835A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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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
- D02G1/004—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by heating fibres, filaments, yarns or threads so as to create a temperature gradient across their diameter, thereby imparting them latent asymmetrical shrinkage properties
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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
- D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
- D02G1/127—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes including drawing or stretching on the same machine
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- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention discloses a preparation process of moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn, which comprises the following steps: (1) preparing special-shaped POY (pre-oriented yarn) precursor: pre-crystallizing, homogenizing and drying the polyester chips to obtain PET dry chips, melting the PET dry chips at high temperature, extruding a melt, performing melt spinning, solidifying and cooling to obtain filaments to obtain special-shaped POY protofilaments; (2) preparing special-shaped DTY (draw textured yarn): carrying out hot stretching on the POY protofilament prepared in the step (1), and then carrying out false twist deformation to obtain a special-shaped DTY; (3) preparing the polyester low-elasticity composite yarn: and (3) compounding the special-shaped POY protofilaments and the special-shaped DTY yarns through a composite yarn guide to form composite yarns, shaping the composite yarns, oiling and winding to obtain the moisture-absorbing and sweat-releasing polyester low-elasticity composite yarns. The polyester low-elasticity composite yarn not only has good moisture absorption and sweat releasing effects, but also has high fiber section profile degree and high strength, and can endow fabrics with rich dyeing effect, good elasticity, good appearance and hand feeling.
Description
Technical Field
The invention belongs to the technical field of composite fiber preparation, and particularly relates to a preparation process of moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn.
Background
Polyester fiber is one of three major fibers in synthetic fiber, and is widely applied to garment materials and other non-garment fields due to excellent physical and chemical properties. However, the application of polyester fibers to fields requiring high moisture absorption or water absorption is limited due to the hydrophobic property of the polyester fibers. The hydrophobic polyester fiber is endowed with hygroscopicity, and a precursor modification method of copolymerization or blending with hydrophilic components in the polymerization and spinning stages can be adopted, and a method of producing profile-shaped yarns by adopting a profile-shaped spinneret plate can also be adopted. The existing polyester fiber with the special-shaped section has low section special-shaped degree, unsatisfactory moisture absorption effect and unsatisfied product quality.
In addition, the varieties of the existing polyester low stretch yarn products are single, the style of the fabric woven by the polyester low stretch yarn products as raw materials is single, the grade cannot meet the requirements, and the woven fabric cannot meet the high requirements in the aspects of hand feeling, appearance, texture, luster and elasticity.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a preparation process of the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn, the terylene low-elasticity composite yarn prepared by the process has better moisture-absorbing and sweat-releasing effects, high degree of profile of the cross section of the fiber and high strength of the fiber, and can endow fabrics with richer dyeing effect, better elasticity, better appearance and hand feeling.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a preparation process of moisture absorption and sweat releasing terylene low-elasticity composite yarn comprises the following steps:
(1) preparing special-shaped POY (pre-oriented yarn) precursor: enabling polyester chips to pass through a wet chip bin, entering a pre-crystallization stage, entering a homogenization drying stage after pre-crystallization, drying to obtain PET dry chips, enabling the PET dry chips to enter a screw extruder, carrying out high-temperature melting, extruding a melt, filtering melt impurities, enabling the melt to enter a spinning assembly, carrying out melt spinning, solidifying and cooling the melt fine flow sprayed out by the spinning assembly into filaments through air flow blown out by a side air blowing cooling device, and obtaining special-shaped POY precursor filaments; the spinneret orifice on the spinneret plate in the spinning assembly is formed by combining three or more than three V-shaped small orifices, the outer ends of the V-shaped small orifices are closed, and the outer ends of included angles of the V-shaped small orifices are in a swelling shape;
(2) preparing special-shaped DTY (draw textured yarn): feeding the POY protofilament prepared in the step (1) into a first hot box of an elasticizer, heating, stretching, cooling, and then entering a false twister for false twisting deformation to obtain special-shaped DTY;
(3) preparing the polyester low-elasticity composite yarn: and (3) compounding the special-shaped POY precursor yarn prepared in the step (1) and the special-shaped DTY yarn prepared in the step (2) through a composite yarn guide to form a composite yarn, feeding the composite yarn into a second hot box for shaping, oiling and winding to obtain the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn.
Further, in the step (1), the temperature of the pre-crystallization is 170-.
Further, in the step (1), the screw temperature of the screw extruder is 260-285 ℃, the spinning temperature in the melt spinning process is 285-290 ℃, the side blowing temperature of the side blowing cooling device is 23-25 ℃, the side blowing speed is 0.4-0.6m/s, and the side blowing humidity is 70-80%.
Further, the spinneret orifice on the spinneret plate in the step (1) is a triangular hollow structure formed by combining three V-shaped small holes, or a square hollow structure formed by combining four V-shaped small holes, or a pentagonal hollow structure formed by combining five V-shaped small holes.
Further, in the step (2), the temperature of the first hot box is 185-.
Further, the speed ratio of the false twister is 1.2-1.4.
The invention has the beneficial effects that:
(1) the invention designs the spinneret orifice of the spinneret plate specially, wherein, the spinneret orifice is formed by combining three or more than three V-shaped small orifices, the outer ends of the V-shaped small orifices are closed, the outer ends of included angles of the V-shaped small orifices are in a swelling shape, so the sectional area of the end parts of the V-shaped small orifices is different from the sectional area of included angles of the swelling shape, thereby the spitting speed of the melt is different, the buckling is generated, the bonding clearance of the melt during bonding is large, the deformation is not easy to generate, the profile degree of a fiber interface is ensured, the fiber is endowed with more remarkable soft luster, finally the fiber with a special section with higher profile degree can be obtained, and the moisture absorption and sweat releasing functions are realized.
(2) The method comprises the steps of preparing DTY (draw textured yarn) by stretching and false twisting of POY (polyester pre-oriented yarn), compounding the DTY and the POY through a composite yarn guide, and then performing heat setting, oiling and winding to obtain the low-elasticity composite polyester yarn; the polyester low-elasticity composite yarn obtained by compounding the POY yarn and the DTY yarn has excellent comprehensive characteristics, the density crystallinity of the composite yarn is between the POY and the DTY, and the boiling water shrinkage is between the POY and the DTY, so that the composite yarn has new characteristics; moreover, because the POY and the DTY have different dyeing rates, the fabric woven by the composite yarn can present snowflake-shaped dyeing effect after being dyed, namely, a novel dyeing effect is obtained; moreover, the fabric woven by the composite yarn is fluffy, has full hand feeling, good texture and luster, good moisture absorption and sweat releasing effects and better elasticity.
(3) The invention reasonably designs each process parameter, improves the section profile degree of the fiber, and improves the internal quality and the tensile property of the composite yarn.
Drawings
FIG. 1 is a schematic view of the structure of the spinneret orifices used in the preparation process of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Example 1
A preparation process of moisture absorption and sweat releasing terylene low-elasticity composite yarn comprises the following steps:
(1) preparing special-shaped POY (pre-oriented yarn) precursor: enabling polyester chips to pass through a wet chip bin, entering a pre-crystallization stage, enabling the pre-crystallization temperature to be 170 ℃ and the pre-crystallization time to be 14min, carrying out homogenization drying after pre-crystallization, enabling the homogenization drying temperature to be 182 ℃ and the drying time to be 5h to obtain PET dry chips, enabling the PET dry chips to enter a screw extruder, dividing the screw extruder into 6 zones, enabling the screw temperature to be 260-285 ℃, carrying out high-temperature melting, extruding a melt, filtering melt impurities, enabling the melt to enter a spinning assembly, carrying out melt spinning, enabling the melt fine flow sprayed out by the spinning assembly to be solidified and cooled into filaments through airflow blown out by a side blowing cooling device, wherein the side blowing temperature is 23 ℃, the side blowing speed is 0.4m/s, and the side blowing humidity is 75% to obtain special-shaped POY precursor; as shown in fig. 1(a), the spinneret orifice on the spinneret plate in the spinning assembly is a triangular hollow structure formed by combining three V-shaped small holes, the outer ends of the V-shaped small holes are closed, and the outer ends of included angles of the V-shaped small holes are expanded; the cross section of the formed special-shaped POY protofilament is of a triangular hollow structure;
(2) preparing special-shaped DTY (draw textured yarn): feeding the POY protofilament prepared in the step (1) into a first hot box of an elasticizer, wherein the temperature of the first hot box is 185 ℃, carrying out thermal stretching, cooling and entering a false twister, the speed ratio of the false twister is 1.2, and carrying out false twisting deformation on the POY protofilament by using the false twister to obtain special-shaped DTY;
(3) preparing the polyester low-elasticity composite yarn: and (3) compounding the special-shaped POY precursor yarn prepared in the step (1) and the special-shaped DTY yarn prepared in the step (2) through a composite yarn guide to form a composite yarn, feeding the composite yarn into a second hot box for shaping, wherein the temperature of the second hot box is 130 ℃, and then oiling and winding to obtain the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn.
Example 2
A preparation process of moisture absorption and sweat releasing terylene low-elasticity composite yarn comprises the following steps:
(1) preparing special-shaped POY (pre-oriented yarn) precursor: enabling polyester chips to pass through a wet chip bin, entering a pre-crystallization stage, enabling the pre-crystallization temperature to be 173 ℃, enabling the pre-crystallization time to be 12min, carrying out homogenization drying after pre-crystallization, enabling the homogenization drying temperature to be 180 ℃ and the drying time to be 6h, obtaining PET dry chips, enabling the PET dry chips to enter a screw extruder, dividing the screw extruder into 6 zones, enabling the screw temperature to be 260-285 ℃, carrying out high-temperature melting, extruding a melt, filtering melt impurities, enabling the melt to enter a spinning assembly, carrying out melt spinning, enabling the melt spun by the spinning assembly to flow through airflow blown out by a side blowing cooling device, solidifying and cooling the melt fine flow into filaments, wherein the side blowing temperature is 24 ℃, the side blowing speed is 0.5m/s, and the side blowing humidity is 75%, and obtaining special-shaped POY precursor filaments; as shown in fig. 1(b), the spinneret orifice on the spinneret plate in the spinning assembly is a square hollow structure formed by combining four V-shaped small holes, the outer ends of the V-shaped small holes are closed, and the outer ends of included angles of the V-shaped small holes are expanded; the cross section of the formed special-shaped POY protofilament is of a square hollow structure;
(2) preparing special-shaped DTY (draw textured yarn): feeding the POY protofilament prepared in the step (1) into a first hot box of an elasticizer, wherein the temperature of the first hot box is 190 ℃, heating, stretching, cooling, and then feeding into a false twister, the speed ratio of the false twister is 1.3, and performing false twisting deformation on the POY protofilament by using the false twister to obtain special-shaped DTY;
(3) preparing the polyester low-elasticity composite yarn: and (3) compounding the special-shaped POY precursor yarn prepared in the step (1) and the special-shaped DTY yarn prepared in the step (2) through a composite yarn guide to form a composite yarn, feeding the composite yarn into a second hot box for shaping, wherein the temperature of the second hot box is 140 ℃, and then oiling and winding to obtain the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn.
Example 3
A preparation process of moisture absorption and sweat releasing terylene low-elasticity composite yarn comprises the following steps:
(1) preparing special-shaped POY (pre-oriented yarn) precursor: enabling polyester chips to pass through a wet chip bin, entering a pre-crystallization stage, enabling the pre-crystallization temperature to be 175 ℃, enabling the pre-crystallization time to be 14min, carrying out homogenization drying after pre-crystallization, enabling the homogenization drying temperature to be 185 ℃ and the drying time to be 4h, obtaining PET dry chips, enabling the PET dry chips to enter a screw extruder, dividing the screw extruder into 6 zones, enabling the screw temperature to be 260-plus-285 ℃, carrying out high-temperature melting, extruding a melt, filtering melt impurities, enabling the melt to enter a spinning assembly, carrying out melt spinning, enabling the melt spun by the spinning assembly to flow through an air flow blown out by a side blowing cooling device, solidifying and cooling the melt fine flow into filaments, wherein the side blowing temperature is 25 ℃, the side blowing speed is 0.6m/s, and the side blowing humidity is 75%, and obtaining special-shaped POY precursor filaments; as shown in fig. 1(c), the spinneret orifice on the spinneret plate in the spinning assembly is a pentagonal hollow structure formed by combining five V-shaped small holes, the outer ends of the V-shaped small holes are closed, and the outer ends of included angles of the V-shaped small holes are in a swelling shape; the cross section of the formed special-shaped POY protofilament is of a pentagonal hollow structure;
(2) preparing special-shaped DTY (draw textured yarn): feeding the POY protofilament prepared in the step (1) into a first hot box of an elasticizer, wherein the temperature of the first hot box is 200 ℃, carrying out thermal stretching, cooling and entering a false twister, the speed ratio of the false twister is 1.4, and carrying out false twisting deformation on the POY protofilament by using the false twister to obtain special-shaped DTY;
(3) preparing the polyester low-elasticity composite yarn: and (3) compounding the special-shaped POY precursor yarn prepared in the step (1) and the special-shaped DTY yarn prepared in the step (2) through a composite yarn guide to form a composite yarn, feeding the composite yarn into a second hot box for shaping, wherein the temperature of the second hot box is 150 ℃, and then oiling and winding to obtain the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn.
The performance of the moisture-absorbing and sweat-releasing polyester low-elasticity composite yarn prepared in the examples 1 to 3 is detected, and the performance detection result is shown in table 1.
TABLE 1 Performance test results of moisture-absorbing and sweat-releasing polyester low-elasticity composite yarn
As can be seen from Table 1, the moisture absorption and sweat releasing terylene low elastic composite yarn prepared by the invention has higher vertical wicking height and liquid carrying rate, which shows that the composite yarn has better moisture absorption and sweat releasing effect; the composite yarn has high breaking strength and elongation at break, excellent mechanical performance, good boiling water shrinkage and crimp shrinkage, and excellent comprehensive performance.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A preparation process of moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn is characterized by comprising the following steps:
(1) preparing special-shaped POY (pre-oriented yarn) precursor: enabling polyester chips to pass through a wet chip bin, entering a pre-crystallization stage, entering a homogenization drying stage after pre-crystallization, drying to obtain PET dry chips, enabling the PET dry chips to enter a screw extruder, carrying out high-temperature melting, extruding a melt, filtering melt impurities, enabling the melt to enter a spinning assembly, carrying out melt spinning, solidifying and cooling the melt fine flow sprayed out by the spinning assembly into filaments through air flow blown out by a side air blowing cooling device, and obtaining special-shaped POY precursor filaments; the spinneret orifice on the spinneret plate in the spinning assembly is formed by combining three or more than three V-shaped small orifices, the outer ends of the V-shaped small orifices are closed, and the outer ends of included angles of the V-shaped small orifices are in a swelling shape;
(2) preparing special-shaped DTY (draw textured yarn): feeding the POY protofilament prepared in the step (1) into a first hot box of an elasticizer, heating, stretching, cooling, and then entering a false twister for false twisting deformation to obtain special-shaped DTY;
(3) preparing the polyester low-elasticity composite yarn: and (3) compounding the special-shaped POY precursor yarn prepared in the step (1) and the special-shaped DTY yarn prepared in the step (2) through a composite yarn guide to form a composite yarn, feeding the composite yarn into a second hot box for shaping, oiling and winding to obtain the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn.
2. The preparation process of the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn according to claim 1 is characterized in that: in the step (1), the temperature of the pre-crystallization is 170-175 ℃, the time of the pre-crystallization is 12-16min, the temperature of the homogenization drying is 180-185 ℃, and the time of the homogenization drying is 4-6 h.
3. The preparation process of the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn according to claim 1 is characterized in that: in the step (1), the screw temperature of the screw extruder is 260-285 ℃, the spinning temperature in the melt spinning process is 285-290 ℃, the side blowing temperature of the side blowing cooling device is 23-25 ℃, the side blowing speed is 0.4-0.6m/s, and the side blowing humidity is 70-80%.
4. The preparation process of the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn according to claim 1 is characterized in that: the spinneret orifice on the spinneret plate is a triangular hollow structure formed by combining three V-shaped small holes, or a square hollow structure formed by combining four V-shaped small holes, or a pentagonal hollow structure formed by combining five V-shaped small holes.
5. The preparation process of the moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn according to claim 1 is characterized in that: in the step (2), the temperature of the first hot box is 185-200 ℃, and in the step (3), the temperature of the second hot box is 130-150 ℃.
6. The process for preparing moisture-absorbing and sweat-releasing terylene low-elasticity composite yarn according to claim 1, wherein the speed ratio of the false twister is 1.2-1.4.
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Cited By (5)
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| CN112680843A (en) * | 2020-11-30 | 2021-04-20 | 太仓杰希塑化有限公司 | Production process of composite moisture-absorbing quick-drying polyester low-stretch yarn |
| CN113106596A (en) * | 2021-04-15 | 2021-07-13 | 苏州大学 | Moisture-absorbing quick-drying warm composite yarn and preparation method thereof |
| CN113174646A (en) * | 2021-04-25 | 2021-07-27 | 杭州永兴化纤有限公司 | Process for super cotton-like polyester |
| CN113174647A (en) * | 2021-04-25 | 2021-07-27 | 杭州永兴化纤有限公司 | Process for producing colored polyester cotton-like special yarn |
| CN114262947A (en) * | 2021-12-28 | 2022-04-01 | 杭州永兴化纤有限公司 | Preparation process of colored polyester wool-like elastic fiber |
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| CN113174647A (en) * | 2021-04-25 | 2021-07-27 | 杭州永兴化纤有限公司 | Process for producing colored polyester cotton-like special yarn |
| CN114262947A (en) * | 2021-12-28 | 2022-04-01 | 杭州永兴化纤有限公司 | Preparation process of colored polyester wool-like elastic fiber |
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