CN114150396B - Snowflake hollow velvet fiber and preparation method thereof - Google Patents
Snowflake hollow velvet fiber and preparation method thereof Download PDFInfo
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- CN114150396B CN114150396B CN202111668916.0A CN202111668916A CN114150396B CN 114150396 B CN114150396 B CN 114150396B CN 202111668916 A CN202111668916 A CN 202111668916A CN 114150396 B CN114150396 B CN 114150396B
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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
-
- 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
-
- 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
- D01D5/08—Melt spinning methods
-
- 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
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- 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
- D01D5/08—Melt spinning methods
- D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
-
- 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
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention discloses a snowflake hollow velvet fiber and a preparation method thereof, wherein the invention adopts a melt direct spinning technology, uses refined terephthalic acid and ethylene glycol as main raw materials to carry out continuous mass production, has uniform melt quality, can ensure stable fiber quality, has lower cost advantage, adopts a circular blowing cylinder air cooling process, ensures uniform and sufficient cooling condition, has low uniformity of product evenness and good dyeing stability.
Description
Technical Field
The invention relates to a snowflake hollow velvet fiber and a preparation method thereof.
Background
The hollow of the hollow terylene refers to chemical fiber with a tubule-shaped cavity in the axial direction, and the through fiber is a chemical fiber with a tubular cavity in the axial direction. The characteristics are as follows: 1. lighter and warmer: the high hollow structure reduces the weight of the fiber by 20%, and can contain a large amount of static air, so that the thermal insulation performance of the fabric is improved by 65% compared with that of the common homogeneous fabric while the fabric is light; 2. plump and soft: the product becomes a fabric and brings a sense of comfort of being more plump and glutinous and smooth; 3. dry and moisture permeable: compared with daily thick and heavy warm fabric, the fabric is easier to wet, dry and comfortable. The product is widely used in various fields such as thermal underwear, underclothes, sportswear, casual clothing, shirts, outdoor exercises, blankets and the like.
Aiming at the current state of the industry, the pursuit of differentiation of chemical fiber products has become a development trend of the chemical fiber industry. The differentiation rate of chemical fiber products is an important index for representing the technical level of national chemical fiber production, at present, the chemical fiber industry in China mainly expands the productivity of conventional fibers, the problems of conventional and homogeneous products and the like are outstanding, obvious defects exist in the aspects of development and technical innovation of new products, a large gap exists between the differentiation rate of chemical fiber products in China and developed countries, and the chemical fiber products in China are used for enhancing the competitiveness of enterprises, improving the living space of the enterprises and developing novel and functional products to become the main attack direction and new profit growth points of a plurality of enterprises. Aiming at the situation, after extensive market research, the present market shows that the number of companies for producing triangular hollow special-shaped fibers is small, the number of products is small, and the product has good economic benefit once successfully developed.
Therefore, in order to further develop the product sales market of companies, improve the added value of products and increase the profit space, we propose a snowflake hollow velvet fiber and a preparation method thereof.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a snowflake hollow velvet fiber and a preparation method thereof, wherein the snowflake hollow velvet fiber is prepared by directly esterifying refined terephthalic acid (PTA) and Ethylene Glycol (EG) serving as raw materials and continuously polycondensing polyester melt. The product of the invention has the advantages of lower cost, good dyeing stability and good product quality.
The technical scheme of the invention is as follows:
a preparation method of snowflake hollow velvet fiber comprises the following steps:
s1: adding ethylene glycol and refined terephthalic acid into a slurry preparation tank, pumping the prepared slurry into a buffer tank, continuously metering and feeding the slurry into an esterification kettle, and esterifying the slurry under the pressure of 21kpa, the temperature of 267.5 ℃ and the self-circulation action of materials to form an oligomer; the obtained oligomer is pumped into a pre-polycondensation kettle, a catalyst, a delustring agent and diethylene glycol are added on an oligomer conveying pipeline by using a nozzle and a static mixer, and polycondensation reaction is carried out under vacuum of 20mmHg at 284 ℃ to generate prepolymer; then the prepolymer is sent into a final polycondensation kettle by using pressure difference and liquid level, reacts under the vacuum 2.1mmHg, 284.5 DEG temperature and squirrel cage stirring action of the final polycondensation kettle, and the viscosity is controlled to be 50 cv+/-1 by calculating a TOV viscometer so as to reach the polycondensation terminal point;
wherein:
the raw material glycol can be glycol recovered and refined in the esterification and polycondensation processes, and the mol ratio of the glycol to the refined terephthalic acid is 1.5-2: 1, preferably ethylene glycol and refined terephthalic acid, the density of the slurry obtained by the preparation is 1305KG/m 3 ；
The catalyst is ethylene glycol antimony which is a common polyester catalyst, and the addition amount is 280-330 PPM of the mass of the oligomer;
the matting agent is titanium dioxide, and the addition amount is 0.25 percent+/-0.03 percent of the mass of the oligomer;
the addition amount of the diethylene glycol is 1.37% +/-0.05% of the mass of the oligomer;
the pre-polycondensation and the final polycondensation adopt EG steam jet pump to vacuumize; the final polycondensation kettle adopts Du Bangsan kettle technology, the melt intrinsic viscosity obtained by final polycondensation is 0.618+/-0.03d1/g, the terminal carboxyl content is 45+/-0.05 Mol/t, and the diethylene glycol content is 1.37+/-0.05%;
s2: the melt from the final polycondensation kettle is pumped out by a melt pump, filtered by a melt filter, conveyed to a melt cooler by a melt booster pump, cooled to 277-280 ℃, conveyed to a spinning box by a multistage static mixer, cooled and molded by the spinning box, oiled, guided by a guide wire disc, coiled and molded, and detected;
wherein:
the pressure of a spinning component in the spinning box body reaches 180-200 bar, the shearing and homogenizing effects of the melt in the component are enhanced, and the flow property of the melt is improved; the spinning adopts a complete set of German Ba Ma Gexiang body equipment, a circular blowing cooling process is adopted, the spinning adopts a 104mm spinneret plate, and a triangular hollow single cake design is adopted;
when oiling, the oil frame is slightly inclined to form an angle of minus 3-5 degrees with the horizontal plane (as shown in figure 3), so that friction resistance is reduced; the oiling nozzle adopts a novel small-sized celluloid oil nozzle, so that the spinning tension uniformity is better; the height of the oil frame is 800mm, the wind pressure is 25Pa, the winding speed is 2800m/min, the full-roll weight is 11.5Kg, and the full-roll diameter is within 425 mm;
the winding forming adopts a Bama lattice ACW winding head to ensure the quality of the tail fibers;
s3: qualified products of product detection are finished, and the products are shipped after classified packaging;
the product detection adopts a domestic YG139C-J yarn dryer, a domestic single yarn strength tester, and the nuclear magnetic resonance detector-MQC is used for measuring the oil content of the fiber.
Compared with the prior art, the invention has the beneficial effects that:
1. the melt direct spinning technology is adopted, refined terephthalic acid and ethylene glycol are used as main raw materials for continuous mass production, the melt quality is uniform, the stable fiber quality can be ensured, and the method has the advantage of lower cost;
2. by executing the process route of low-temperature conveying and high-temperature spinning, the viscosity of the oil-free silk is reduced by not more than 0.015d1/g;
3. the spinning and winding process has improved equipment and technological conditions, and several new technologies are developed and applied.
Drawings
Fig. 1: a polyester filament process flow diagram.
Fig. 2: the triangular hollow finished product structure of the invention is schematically shown.
Fig. 3: schematic diagram of the inclination angle of the oil frame.
Detailed Description
The present invention is further described below by way of specific examples, but the scope of the present invention is not limited thereto.
Example 1:
a snowflake hollow velvet fiber and a preparation method thereof, wherein the snowflake hollow velvet fiber comprises refined terephthalic acid and ethylene glycol according to a mole ratio of 1.76: EG and PTA of 1 are proportioned.
The method comprises the following steps:
s1: ethylene glycol and refined terephthalic acid are added into a slurry configuration tank (slurry density is controlled to 1305 KG/m) 3 ) The prepared slurry is pumped into a buffer tank and continuously metered into an esterification kettle. At a certain pressure of 21kpa,Esterifying at 267.5 deg.c for 2 hr to form oligomer, and pumping into pre-polycondensation kettle. Adding 0.48 kg/ton of catalyst ethylene glycol antimony, 2.39 kg/ton of matting agent titanium white powder and 7.23 kg/ton of diglycol into an oligomer conveying pipeline by using a nozzle and a static mixer, carrying out polycondensation reaction on the esterified substance for 1.5 hours under a certain vacuum of 20mmHg and a temperature of 284 ℃, and conveying the generated prepolymer into a final polycondensation kettle by using a pressure difference and a liquid level. The prepolymer was reacted under high vacuum 2.1mmhg, high temperature 284.5℃and final polymerization kettle squirrel cage stirring for 0.5 hour, and the viscosity was controlled to 50cv by calculation of TOV viscometer to reach the polycondensation end point.
The pre-polycondensation and final polycondensation were evacuated using EG vapor jet pumps.
The final polymerization kettle adopts Du Bangsan kettle technology, the melt intrinsic viscosity is 0.618+/-0.03d1/g, the carboxyl end group content is 45+/-0.05 Mol/t, and the diethylene glycol content is 1.37+/-0.05%;
s2: the melt from the final polymerization kettle is sent out through two melt pumps 1271-P01A/B (each melt pump is provided with a TOV viscometer for online measurement of the viscosity of the polyester melt), impurities with the diameter of more than 20 mu m are filtered through a melt filter, are conveyed into a melt cooler through a melt booster pump to be cooled to 277-280 ℃, are then conveyed to a spinning box through a multistage static mixer, are oiled after being cooled and molded through spinning formed by the spinning box, are subjected to wire guiding by a wire guiding disc, are then coiled and molded, and are subjected to product detection;
the spinning adopts a complete set of German Ba Ma Gexiang body equipment and a circular blowing cooling process, the spinning adopts a 104mm spinneret plate, a triangular hollow single cake design, the height of an oil frame is 800mm, the wind pressure is 25Pa, the winding speed is 2800m/min, the full-roll weight is 11.5Kg, and the full-roll diameter is within 425 mm;
the micro-inclination angle of the oiling frame forms a negative 4-degree angle with the horizontal plane, so that friction resistance is reduced, a novel small-sized celluloid oil nozzle is adopted as the oiling nozzle, so that the uniformity of spinning tension is better, and the winding forming adopts a Bama lattice ACW winding head, so that the quality of tail fibers is ensured;
the pressure of the spinning component reaches 180-200 bar, when the component is assembled, 5 layers of filter screens are adopted, two layers of 400-mesh edge-covering screens are contained, concrete sand is prepared into two layers of 60-80-mesh 80 g and three layers of 40-60-mesh 120 g, so that the shearing and homogenizing effects of melt in the component are enhanced, and the flow property of the melt is improved;
s3: the qualified products of the product detection are packaged in a grading way, and finally delivered;
the product detection adopts a domestic YG139C-J yarn dryer, a domestic single yarn strength tester, and the nuclear magnetic resonance detector-MQC is used for measuring the oil content of the fiber.
The optimization process of the process flow of the invention is as follows:
the assembly pressure of normal spinning is about 130-150 bar, the assembly pressure is controlled at about 150bar during test spinning, but multiple tests are unsuccessful, the assembly pressure is up to 180-200 bar later, the shearing and homogenizing effects of melt in the assembly are enhanced, the flow property of the melt is improved, the spinning condition is obviously improved, meanwhile, the spinning adopts the circular blowing technology, the air-receiving uniformity of the triangular section is better, the conventional 150D/96F spinning varieties are low oil frames and high-wind pressure processes, the evenness of the hollow special-shaped varieties is generally increased after the hollow special-shaped varieties are up, the average CV value is over 1.5, the spinning cakes are all reduced, and multiple tests are carried out:
1. the oil frame is not moved, and the wind pressure is tested from high to low;
2. the wind pressure is fixed, and the oil frame is tested from high to low;
finally, the oil frame is up-regulated, the air pressure is down-regulated, the evenness is reduced, the CV value is about 1.2, and the technological requirements can be met, as shown in Table 1.
Table 1 oil rack wind pressure test recording table
1. The micro-dip angle of the oiling oil frame forms a negative 3-5 DEG angle with the horizontal plane, the influence of friction resistance and rebound of cooling wind is reduced, the uniformity of spinning tension is better, 3560 oil nozzles are used before the circular blowing varieties 96F-288F, the evenness CV is below 1.0, the elongation CV is below 2.8, and the production condition is better; however, after the variety is put on, the evenness is large, the elongation CV is about 3.0, the oil-containing CV is also large, the production condition is poor, for this reason, a series of oil nozzle tests are carried out, the evenness CV is required to be controlled below 1.0, the elongation CV is required to be controlled below 2.5, and the oil-containing CV is required to be controlled below 9%;
2. when the intermediate-range celluloid oil nozzle test is used, the target value cannot be reached, the oil content is in the range of 0.37-0.42%, and the oil content CV is large;
3. the novel small-sized celluloid oil nozzle is adopted, the index is obviously improved after the oil is lifted, the oil content is in the range of 0.39% -0.41%, the oil content CV is small, the elongation CV can be controlled below 2.5, the evenness CV can be controlled below 1.0, the goal is achieved, and the novel oil nozzle is designed to be longer, so that tows are not easy to jump out of the oil nozzle, and the generation of few oil yarns is reduced;
winding key technology
The conventional 150D/96F variety is 15 kg in diameter, the winding diameter can be controlled below 428, and the packaging is simple, but the variety is of a triangular special-shaped section, when 15 kg is made with conventional tension, the full-winding falling wire winding diameter is more than 430, so that the packaging is greatly influenced, and the manual wire moving causes more hair touching, the tension of the variety is reduced by 1-2 g, the full-winding is 11.5kg, and the full-winding diameter is below 425.
TABLE 2 spinning and winding Process parameters and technical indicators
| Parameter name | 270dtex/96F POY hollow special-shaped |
| Case temperature/°c | 285±2 |
| Temperature of circular blowing air/DEGC | 22+ -1 (circular blowing) |
| Circular blowing pressure/m/s | 25PA |
| Distance/mm between oil nozzle and plate surface | 800-1100 |
| Winding speed/m/min | 2800 |
| Linear density center value/dtex | 270 |
| Breaking strength/cN/dtex/cv% | ≧2.50/≦1.8 |
| Elongation at break/%, CV% | 130±4/≦2.5 |
| Evenness CV/% | ≦1.0 |
TABLE 3 test record table for hollow special-shaped tension and coil diameter of the invention
And (5) grading and packaging qualified products subjected to product detection, and finally leaving the factory.
Adopt triangle-shaped spinneret, this spinneret's advantage shows to: a. fully utilizing the outer ring area, and increasing the hole spacing; b. the central non-porous region minimizes turbulence effects; c. the concentric circle arrangement mode ensures that the fiber has better heat preservation performance.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A preparation method of snowflake hollow velvet fiber is characterized by comprising the following steps:
s1: adding ethylene glycol and refined terephthalic acid into a slurry preparation tank, pumping the prepared slurry into a buffer tank, continuously metering and feeding the slurry into an esterification kettle, and esterifying the slurry under the pressure of 21kpa, the temperature of 267.5 ℃ and the self-circulation action of materials to form an oligomer; the obtained oligomer is pumped into a pre-polycondensation kettle, a catalyst, a delustring agent and diethylene glycol are added on an oligomer conveying pipeline by using a nozzle and a static mixer, and polycondensation reaction is carried out under vacuum 20mmHg at 284 ℃ to generate prepolymer; then the prepolymer is sent into a final polycondensation kettle by using pressure difference and liquid level, reacts under the vacuum 2.1mmHg, 284.5 ℃ and squirrel cage stirring action of the final polycondensation kettle, and the viscosity is controlled to be 50 cv+/-1 by calculating a TOV viscometer so as to reach the polycondensation end point;
the mol ratio of the ethylene glycol to the refined terephthalic acid is 1.5-2: 1, a step of;
the catalyst is ethylene glycol antimony;
the delustrant is titanium dioxide;
s2: the melt from the final polycondensation kettle is pumped out by a melt pump, filtered by a melt filter, conveyed to a melt cooler by a melt booster pump, cooled to 277-280 ℃, conveyed to a spinning box by a multistage static mixer, cooled and molded by the spinning box, oiled, guided by a guide wire disc, coiled and molded, and detected;
during spinning, a 104mm spinneret plate is adopted for spinning, and a triangular hollow single cake is designed;
s3: and (5) finishing qualified products of product detection, grading and packaging, and leaving a factory.
2. The method for preparing snowflake hollow fiber according to claim 1, wherein the density of the slurry obtained by preparing ethylene glycol and refined terephthalic acid in s1 is 1305KG/m 3 。
3. The method for preparing snowflake hollow velvet fiber according to claim 1, wherein the catalyst addition amount in s1 is 280-330 PPM of the mass of the oligomer.
4. The method for preparing snowflake hollow fiber according to claim 1, wherein the addition amount of the matting agent in s1 is 0.25% ± 0.03% of the mass of the oligomer.
5. The method for preparing snowflake hollow fiber according to claim 1, wherein the diethylene glycol content in s1 is 1.37% ± 0.05% of the oligomer mass.
6. The process for preparing snowflake hollow fiber according to claim 1, wherein the pressure of the spinning assembly in the spinning beam in s2 is up to 180-200 bar.
7. The method for preparing snowflake hollow velvet fiber according to claim 1, wherein the oil frame is slightly inclined to form an angle of minus 3-5 degrees with the horizontal plane when oiling in s 2.
8. The method for preparing snowflake hollow velvet fiber according to claim 1, wherein the air pressure is 25Pa during the spinning cooling forming in s2, and the height of an oil frame is 800mm during oiling.
9. The snowflake hollow fiber produced by the production method according to any one of claims 1 to 8.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603070A (en) * | 2013-10-21 | 2014-02-26 | 桐乡市中辰化纤有限公司 | Preparation method of high-comfort triangular hollow microporous fiber |
| WO2019047588A1 (en) * | 2017-09-07 | 2019-03-14 | 江苏恒科新材料有限公司 | Preparation method for cationic dyeable polyester fiber |
| CN112663153A (en) * | 2020-12-22 | 2021-04-16 | 江苏德力化纤有限公司 | Porous moisture-permeable, warm-keeping and antistatic polyester fiber and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603070A (en) * | 2013-10-21 | 2014-02-26 | 桐乡市中辰化纤有限公司 | Preparation method of high-comfort triangular hollow microporous fiber |
| WO2019047588A1 (en) * | 2017-09-07 | 2019-03-14 | 江苏恒科新材料有限公司 | Preparation method for cationic dyeable polyester fiber |
| CN112663153A (en) * | 2020-12-22 | 2021-04-16 | 江苏德力化纤有限公司 | Porous moisture-permeable, warm-keeping and antistatic polyester fiber and preparation method thereof |
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