CN109252242B - Polyester staple fiber and preparation method thereof - Google Patents
Polyester staple fiber and preparation method thereof Download PDFInfo
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- CN109252242B CN109252242B CN201810904585.8A CN201810904585A CN109252242B CN 109252242 B CN109252242 B CN 109252242B CN 201810904585 A CN201810904585 A CN 201810904585A CN 109252242 B CN109252242 B CN 109252242B
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/681—Polyesters containing atoms other than carbon, hydrogen and oxygen containing elements not provided for by groups C08G63/682 - C08G63/698
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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
- 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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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Artificial Filaments (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
The invention relates to a polyester staple fiber and a preparation method thereof, wherein the preparation method of the polyester staple fiber comprises the following steps: (1) mixing terephthalic acid and ethylene glycol at 50-60 ℃; then heating to 150 ℃ and 160 ℃ for esterification reaction; (2) adding dimethyl propylene glycol, 52, 5-dimethyl-2, 5-hexynediol, 2-butene-1, 4-di-n-butyl ester, di (hexane-1, 6-diol) titanium, a composite functional additive, terephthalic acid and glycol ester into a product after esterification reaction, and then sequentially carrying out first polymerization reaction and second polymerization reaction to obtain a copolyester melt; (3) carrying out melt spinning on the copolyester melt; (4) extruding the melt through a spinneret plate and cooling; (5) and sequentially carrying out nozzle oiling and bundling, guide wire, heat setting and winding forming to obtain the polyester staple fiber. The polyester staple fiber obtained by the invention has the advantage of good heat retention property.
Description
Technical Field
The invention relates to a textile technology, in particular to polyester staple fiber and a preparation method thereof.
Background
The polyester staple fiber is obtained by spinning polyester (polyethylene terephthalate, PET for short, polymerized by PTA and MEG) into a tow and cutting the tow. PET is in the shape of rice grains or flakes, and has various colors (usually, polyester is the main component which contacts many beverage bottles, and the PET can be sliced into polyester staple fibers through two main procedures of pre-spinning and post-spinning, and the polyester staple fibers can be cut into the polyester staple fibers with different specifications in the post-spinning according to different requirements, generally 4D-22D, and can be divided into two-dimensional and three-dimensional types according to the curling condition). 75 percent of the polyester is used for chemical fiber, and the polyester staple fiber and the polyester filament yarn are manufactured according to the requirements of the textile industry.
In the prior art, the heat preservation performance of the polyester staple fibers cannot well meet the heat preservation requirement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides the polyester staple fiber with good heat retention property and the preparation method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
a preparation method of polyester staple fibers comprises the following steps:
(1) mixing 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 50-60 ℃; then heating to 150-160 ℃ for esterification reaction, wherein the reaction time is 10-15 min;
(2) adding 8-10 parts by weight of dimethyl propylene glycol, 5-10 parts by weight of 2, 5-dimethyl-2, 5-hexynediol, 5-15 parts by weight of 2-butene-1, 4-di-n-butyl ester, 5-10 parts by weight of titanium bis (hexane-1, 6-diol), 5-10 parts by weight of composite functional additive, 100 parts by weight of terephthalic acid and 50 parts by weight of glycol ester into the product after the esterification reaction, heating to 200-250 ℃, and reacting for 10-15min under the vacuum condition of 200-300Pa to perform a first polymerization reaction; then reacting for 5-10min at the temperature of 230-; the composite functional additive is a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface-modified aluminum-doped zinc oxide powder is 1 (2-4) to 1 (2-4) in sequence;
(3) carrying out melt spinning on the copolyester melt;
(4) extruding the melt through a profile spinneret and cooling;
(5) and sequentially carrying out nozzle oiling and bundling, guide wire, heat setting and winding forming to obtain the polyester staple fiber.
The polyester staple fiber is prepared by the preparation method of the polyester staple fiber.
The invention has the beneficial effects that:
(1) the composite functional additive is designed to be a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio is designed, so that the polyester staple fibers can obtain a good far infrared emission function, and further obtain good heat preservation performance, and the heat preservation performance can be further improved by matching with the design of the particle size of the powder;
(2) the added dimethyl propylene glycol, 2, 5-dimethyl-2, 5-hexynediol, 2-butene-1, 4-di-n-butyl ester and di (hexane-1, 6-diol) titanium can be used as a regulator for controlling the molecular structure of the polymer obtained after polymerization reaction, and the composite functional additive can be used in cooperation, so that the prepared polyester staple fiber has good heat preservation performance, breaking strength and moisture regain.
Drawings
Fig. 1 is a schematic structural diagram of a profile spinneret according to an embodiment of the present invention.
Description of reference numerals:
1. a profiled spinneret plate; 11. spinning micropores; 12. a closed loop structure.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: the composite functional additive is designed to ensure that the prepared polyester staple fiber has the heat preservation performance.
A preparation method of polyester staple fibers comprises the following steps:
(1) mixing 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 50-60 ℃; then heating to 150-160 ℃ for esterification reaction, wherein the reaction time is 10-15 min;
(2) adding 8-10 parts by weight of dimethyl propylene glycol, 5-10 parts by weight of 2, 5-dimethyl-2, 5-hexynediol, 5-15 parts by weight of 2-butene-1, 4-di-n-butyl ester, 5-10 parts by weight of titanium bis (hexane-1, 6-diol), 5-10 parts by weight of composite functional additive, 100 parts by weight of terephthalic acid and 50 parts by weight of glycol ester into the product after the esterification reaction, heating to 200-250 ℃, and reacting for 10-15min under the vacuum condition of 200-300Pa to perform a first polymerization reaction; then reacting for 5-10min at the temperature of 230-; the composite functional additive is a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface-modified aluminum-doped zinc oxide powder is 1 (2-4) to 1 (2-4) in sequence;
(3) carrying out melt spinning on the copolyester melt;
(4) extruding the melt through a profile spinneret and cooling;
(5) and sequentially carrying out nozzle oiling and bundling, guide wire, heat setting and winding forming to obtain the polyester staple fiber.
The polyester staple fiber is prepared by the preparation method of the polyester staple fiber.
From the above description, the beneficial effects of the present invention are:
(1) the composite functional additive is designed to be a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio is designed, so that the polyester staple fibers can obtain a good far infrared emission function, and further obtain good heat preservation performance, and the heat preservation performance can be further improved by matching with the design of the particle size of the powder;
(2) the added dimethyl propylene glycol, 2, 5-dimethyl-2, 5-hexynediol, 2-butene-1, 4-di-n-butyl ester and di (hexane-1, 6-diol) titanium can be used as a regulator for controlling the molecular structure of the polymer obtained after polymerization reaction, and the composite functional additive can be used in cooperation, so that the prepared polyester staple fiber has good heat preservation performance, breaking strength and moisture regain.
Further, the step (3) is specifically as follows: and pressurizing and conveying the copolyester melt to a spinning manifold through a melt pipeline and a booster pump, and conveying the copolyester melt to a spinning assembly through a metering pump, wherein the spinning temperature is 278 +/-2 ℃.
Further, the step (4) is specifically as follows: extruding the melt through a spinneret plate to form melt trickle, and then solidifying the melt trickle into strand silk by adopting a side-blowing cooling process; the conditions of the side-blown cooling process are as follows: the speed of the cross air blow is 0.30m/s-0.50m/s, the temperature of the cross air blow is 18 +/-2 ℃, and the humidity of the cross air blow is 75 +/-5%.
Further, the step (5) is specifically as follows: the filament bundles after being oiled and collected by the nozzle are input into a lower godet with the speed of 3105 and 3610m/min, and then enter a thermal conducting wire roller with the speed of 3105 and 3610m/min and the temperature of 120 and 135 ℃ for heat setting; and winding and forming at the winding speed of 3100-3600m/mi to obtain the polyester staple fiber.
Further, the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface modified aluminum-doped zinc oxide powder is 1:2:1:3 in sequence.
Further, the profiled spinneret plate 1 is of an annular structure, at least three spinneret micropores 11 are arranged on the profiled spinneret plate 1, the spinneret micropores 11 are herringbone, two ends of the bottom of each three herringbone spinneret micropores are sequentially connected end to form a closed annular structure 12, and the distance between two ends of the bottom of the herringbone spinneret micropores is 0.35-0.85 mm.
According to the description, in the structural design of the profiled spinneret plate, two ends of the bottom of every three herringbone spinneret micropores are sequentially connected end to form a closed annular structure, the middle part of the closed annular structure is hollow, and after a melt is continuously and orderly extruded from the middle part of the closed annular structure, on one hand, the stability of a short fiber structure can be maintained, and a good foundation is provided for preparing and obtaining good fiber performance; on one hand, after the melt is extruded, a special three-dimensional structure can be obtained, and the herringbone spinneret micropores can enable the surface of the fiber to obtain distinctive groove structure characteristics, so that the fiber has good performance due to the groove structure.
Further, the particle size of the silicon dioxide, germanium dioxide, aluminum oxide and surface modified aluminum doped zinc oxide powder is 10-30 microns.
Referring to fig. 1, a first embodiment of the present invention is:
the preparation method of the polyester staple fiber comprises the following steps:
(1) mixing 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 55 ℃; then heating to 155 ℃ for esterification reaction, wherein the reaction time is 12 min;
(2) adding 9 parts by weight of dimethyl propylene glycol, 8 parts by weight of 2, 5-dimethyl-2, 5-hexynediol, 10 parts by weight of 2-butene-1, 4-di-n-butyl ester, 8 parts by weight of bis (hexane-1, 6-diol) titanium, 8 parts by weight of composite functional additive, 100 parts by weight of terephthalic acid and 50 parts by weight of glycol ester into a product after esterification reaction, heating to 230 ℃, reacting for 12min under the vacuum condition of 250Pa, and carrying out first polymerization reaction; reacting for 8min at 240 ℃ under 300Pa vacuum condition, and carrying out second polymerization reaction to obtain copolyester melt; the composite functional additive is a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface-modified aluminum-doped zinc oxide powder is 1:2:1:3 in sequence; the particle size of the silicon dioxide, germanium dioxide, aluminum oxide and surface modified aluminum-doped zinc oxide powder is 20 microns;
(3) pressurizing and conveying the copolyester melt to a spinning manifold through a melt pipeline and a booster pump, and conveying the copolyester melt to a spinning assembly through a metering pump, wherein the spinning temperature is 278 ℃;
(4) extruding the melt through a profile spinneret plate 1 to form melt trickle, and then solidifying the melt trickle into strand silk by adopting a side-blowing cooling process; the conditions of the side-blown cooling process are as follows: the speed of cross air blowing is 0.40m/s, the temperature of the cross air blowing is 18 ℃, and the humidity of the cross air blowing is 75 percent; the profiled spinneret plate 1 is of an annular structure, at least three spinneret micropores 11 are arranged on the profiled spinneret plate, the spinneret micropores 11 are herringbone, two ends of the bottom of each three herringbone spinneret micropores 11 are sequentially connected end to form a closed annular structure 12, and the distance between two ends of the bottom of each herringbone spinneret micropore 11 is 0.60 mm;
(5) the tows after being oiled and collected by the nozzle are input into a lower godet with the speed of 3500m/min and then enter a hot wire roller with the speed of 3500m/min and the temperature of 128 ℃ for heat setting; and (3) winding and forming at a winding speed of 3400m/mi to obtain the polyester staple fibers.
Referring to fig. 1, the second embodiment of the present invention is:
the preparation method of the polyester staple fiber comprises the following steps:
(1) mixing 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 50 ℃; then heating to 150 ℃ for esterification reaction, wherein the reaction time is 10 min;
(2) adding 8 parts by weight of dimethyl propylene glycol, 5 parts by weight of 2, 5-dimethyl-2, 5-hexynediol, 5 parts by weight of 2-butene-1, 4-di-n-butyl ester, 5 parts by weight of bis (hexane-1, 6-diol) titanium, 5 parts by weight of a composite functional additive, 100 parts by weight of terephthalic acid and 50 parts by weight of glycol ester into a product after esterification reaction, heating to 200 ℃, reacting for 10min under the vacuum condition of 200Pa, and carrying out first polymerization reaction; reacting for 5min at 230 ℃ under the vacuum condition of 250Pa, and carrying out second polymerization reaction to obtain a copolyester melt; the composite functional additive is a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface-modified aluminum-doped zinc oxide powder is 1:2:1:2 in sequence; the particle size of the silicon dioxide, germanium dioxide, aluminum oxide and surface modified aluminum-doped zinc oxide powder is 10 microns;
(3) pressurizing and conveying the copolyester melt to a spinning manifold through a melt pipeline and a booster pump, and conveying the copolyester melt to a spinning assembly through a metering pump, wherein the spinning temperature is 276 ℃;
(4) extruding the melt through a profile spinneret plate 1 to form melt trickle, and then solidifying the melt trickle into strand silk by adopting a side-blowing cooling process; the conditions of the side-blown cooling process are as follows: the speed of cross air blowing is 0.30m/s, the temperature of the cross air blowing is 16 ℃, and the humidity of the cross air blowing is 70 percent; the profiled spinneret plate 1 is of an annular structure, at least three spinneret micropores 11 are arranged on the profiled spinneret plate, the spinneret micropores 11 are herringbone, two ends of the bottom of each three herringbone spinneret micropores 11 are sequentially connected end to form a closed annular structure 12, and the distance between two ends of the bottom of each herringbone spinneret micropore 11 is 0.35 mm;
(5) the filament bundles after being oiled and gathered by the nozzle are input into a lower godet with the speed of 3105m/min and then enter a hot wire roller with the speed of 3105m/min and the temperature of 120 ℃ for heat setting; and winding and forming at a winding speed of 3100m/mi to obtain the polyester staple fibers.
Referring to fig. 1, a third embodiment of the present invention is:
the preparation method of the polyester staple fiber comprises the following steps:
(1) mixing 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 60 ℃; then heating to 160 ℃ for esterification reaction, wherein the reaction time is 10-15 min;
(2) adding 10 parts by weight of dimethyl propylene glycol, 10 parts by weight of 2, 5-dimethyl-2, 5-hexynediol, 15 parts by weight of 2-butene-1, 4-di-n-butyl ester, 10 parts by weight of bis (hexane-1, 6-diol) titanium, 10 parts by weight of a composite functional additive, 100 parts by weight of terephthalic acid and 50 parts by weight of glycol ester into a product after esterification reaction, heating to 250 ℃, reacting for 15min under the vacuum condition of 300Pa, and carrying out first polymerization reaction; then reacting for 10min at 260 ℃ under 350Pa vacuum condition, and carrying out second polymerization reaction to obtain copolyester melt; the composite functional additive is a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface-modified aluminum-doped zinc oxide powder is 1:4:1:4 in sequence; the particle size of the silicon dioxide, germanium dioxide, aluminum oxide and surface modified aluminum-doped zinc oxide powder is 30 microns;
(3) pressurizing and conveying the copolyester melt to a spinning manifold through a melt pipeline and a booster pump, and conveying the copolyester melt to a spinning assembly through a metering pump, wherein the spinning temperature is 280 ℃;
(4) extruding the melt through a profile spinneret plate 1 to form melt trickle, and then solidifying the melt trickle into strand silk by adopting a side-blowing cooling process; the conditions of the side-blown cooling process are as follows: the speed of cross air blowing is 0.50m/s, the temperature of the cross air blowing is 20 ℃, and the humidity of the cross air blowing is 80 percent; the profiled spinneret plate 1 is of an annular structure, at least three spinneret micropores 11 are arranged on the profiled spinneret plate, the spinneret micropores 11 are herringbone, two ends of the bottom of each three herringbone spinneret micropores 11 are sequentially connected end to form a closed annular structure 12, and the distance between two ends of the bottom of each herringbone spinneret micropore 11 is 0.85 mm;
(5) the filament bundle after being oiled and collected by the nozzle is input into a lower godet with the speed of 3610m/min and then enters a hot guide wire roller with the speed of 3610m/min and the temperature of 135 ℃ for heat setting; and (3) winding and forming at a winding speed of 3600m/mi to obtain the polyester staple fibers.
Performance testing
1. According to GB/T6503-2008, the breaking strength and moisture regain of the polyester staple fibers obtained in the first to third examples are respectively tested, and the test results are shown in Table 1;
TABLE 1
| Test group | Breaking strength (cN/dtex) | Moisture regain (%) |
| Example one | 4.3 | 2.3 |
| Example two | 4.5 | 2.1 |
| EXAMPLE III | 4.2 | 2.6 |
As can be seen from table 1, the breaking strength and moisture regain of the polyester staple fibers obtained in examples one to three meet the standard requirements.
2. The polyester staple fibers obtained in the first to third embodiments are respectively spun into fabrics, and then far infrared performance tests are respectively carried out, and the test results are shown in table 2.
TABLE 2
| Test group | Normal emissivity | Standard requirement for normal emissivity | Conclusion |
| Example one | 0.97 | ≥0.80 | Qualified |
| Example two | 0.96 | ≥0.80 | Qualified |
| EXAMPLE III | 0.95 | ≥0.80 | Qualified |
According to table 2, the normal emissivity of the fabrics spun by the polyester staple fibers obtained in the first to third embodiments is greater than the standard requirement, and the fabrics have the function of keeping warm.
In conclusion, the polyester staple fiber provided by the invention has the advantage of good heat preservation 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 equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (7)
1. A preparation method of polyester staple fibers for spinning is characterized by comprising the following steps:
(1) mixing 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 50-60 ℃; then heating to 150-160 ℃ for esterification reaction, wherein the reaction time is 10-15 min;
(2) adding 8-10 parts by weight of dimethyl propylene glycol, 5-10 parts by weight of 2, 5-dimethyl-2, 5-hexynediol, 5-15 parts by weight of 2-butene-1, 4-di-n-butyl ester, 5-10 parts by weight of titanium bis (hexane-1, 6-diol), 5-10 parts by weight of composite functional additive, 100 parts by weight of terephthalic acid and 50 parts by weight of glycol ester into the product after the esterification reaction, heating to 200-250 ℃, and reacting for 10-15min under the vacuum condition of 200-300Pa to perform a first polymerization reaction; then reacting for 5-10min at the temperature of 230-; the composite functional additive is a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, and the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface-modified aluminum-doped zinc oxide powder is 1 (2-4) to 1 (2-4) in sequence;
(3) carrying out melt spinning on the copolyester melt;
(4) extruding the melt through a profile spinneret and cooling; the special-shaped spinneret plate is of an annular structure, at least three spinneret micropores are arranged on the special-shaped spinneret plate, the spinneret micropores are herringbone, two ends of the bottom of each three herringbone spinneret micropores are sequentially connected end to form a closed annular structure, and the distance between two ends of the bottom of each herringbone spinneret micropore is 0.35-0.85 mm;
(5) sequentially carrying out nozzle oiling and bundling, yarn guiding, heat setting and winding forming to obtain the polyester staple fibers;
the normal emissivity of the prepared polyester staple fiber is 0.95 or 0.96 or 0.97.
2. The method for preparing polyester staple fibers for spinning according to claim 1, wherein the step (3) is specifically as follows: and pressurizing and conveying the copolyester melt to a spinning manifold through a melt pipeline and a booster pump, and conveying the copolyester melt to a spinning assembly through a metering pump, wherein the spinning temperature is 278 +/-2 ℃.
3. The method for preparing the polyester staple fibers for spinning according to claim 1, wherein the step (4) is specifically as follows: extruding the melt through a spinneret plate to form melt trickle, and then solidifying the melt trickle into strand silk by adopting a side-blowing cooling process; the conditions of the side-blown cooling process are as follows: the speed of the cross air blow is 0.30m/s-0.50m/s, the temperature of the cross air blow is 18 +/-2 ℃, and the humidity of the cross air blow is 75 +/-5%.
4. The method for preparing polyester staple fibers according to claim 1, wherein the step (5) is specifically as follows: the filament bundles after being oiled and collected by the nozzle are input into a lower godet with the speed of 3105 and 3610m/min, and then enter a thermal conducting wire roller with the speed of 3105 and 3610m/min and the temperature of 120 and 135 ℃ for heat setting; and winding and forming at the winding speed of 3100-3600m/mi to obtain the polyester staple fiber.
5. The preparation method of the polyester staple fiber according to claim 1, wherein the mass ratio of the silicon dioxide, the germanium dioxide, the aluminum oxide and the surface-modified aluminum-doped zinc oxide powder is 1:2:1:3 in sequence.
6. The method for preparing polyester staple fibers according to claim 1, wherein the particle size of the silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder is 10 to 30 μm.
7. A polyester staple fiber, characterized by being prepared by the method for preparing the polyester staple fiber according to any one of claims 1 to 5.
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| CN111041572A (en) * | 2019-12-03 | 2020-04-21 | 北京航空航天大学 | Novel structural fiber for ultra-fast directional liquid transportation and preparation method thereof |
| CN111100433B (en) * | 2019-12-26 | 2022-01-21 | 闽江学院 | Preparation method of oxygen barrier type PET bottle and product thereof |
| CN113638110A (en) * | 2021-09-16 | 2021-11-12 | 福州市晟浩纺织科技有限公司 | Manufacturing method of quick-drying polyester fabric |
| CN115928246A (en) * | 2022-11-17 | 2023-04-07 | 福建经纬新纤科技实业有限公司 | Preparation method of polyester staple fibers |
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| CN107723834A (en) * | 2017-11-27 | 2018-02-23 | 福建经纬新纤科技实业有限公司 | A kind of industry terylene short fiber and preparation method thereof |
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| CN104153034A (en) * | 2014-08-13 | 2014-11-19 | 浙江华峰氨纶股份有限公司 | Polyurethane elastic fiber with thermal insulation performance and preparation method thereof |
| CN105040413A (en) * | 2015-06-23 | 2015-11-11 | 安徽皖翎羽绒制品有限公司 | High-water-tolerant down feather composite warmth retention material and preparation method thereof |
| CN107723834A (en) * | 2017-11-27 | 2018-02-23 | 福建经纬新纤科技实业有限公司 | A kind of industry terylene short fiber and preparation method thereof |
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