CN115074858A - Antibacterial low-melting-point polyester staple fiber and preparation method thereof - Google Patents
Antibacterial low-melting-point polyester staple fiber and preparation method thereof Download PDFInfo
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- CN115074858A CN115074858A CN202210932533.8A CN202210932533A CN115074858A CN 115074858 A CN115074858 A CN 115074858A CN 202210932533 A CN202210932533 A CN 202210932533A CN 115074858 A CN115074858 A CN 115074858A
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- 229920000728 polyester Polymers 0.000 title claims abstract description 77
- 239000000835 fiber Substances 0.000 title claims abstract description 56
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 70
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims abstract description 32
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 22
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 12
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 11
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 11
- 239000001361 adipic acid Substances 0.000 claims abstract description 11
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920000570 polyether Polymers 0.000 claims abstract description 11
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000002148 esters Chemical class 0.000 claims abstract description 6
- 238000011065 in-situ storage Methods 0.000 claims abstract description 6
- 229920000642 polymer Polymers 0.000 claims description 21
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 16
- 238000009987 spinning Methods 0.000 claims description 11
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 10
- 150000002009 diols Chemical class 0.000 claims description 10
- 238000006068 polycondensation reaction Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 8
- 239000004970 Chain extender Substances 0.000 claims description 5
- 229910052787 antimony Inorganic materials 0.000 claims description 5
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 5
- WSXIMVDZMNWNRF-UHFFFAOYSA-N antimony;ethane-1,2-diol Chemical compound [Sb].OCCO WSXIMVDZMNWNRF-UHFFFAOYSA-N 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000009998 heat setting Methods 0.000 claims description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 230000000845 anti-microbial effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000004069 differentiation Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003242 anti bacterial agent Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- D01F1/103—Agents inhibiting growth of microorganisms
Abstract
The invention relates to an antibacterial low-melting-point polyester staple fiber which comprises the following components in parts by weight: 34-43% of thermoplastic polyurethane; 56.26-66.52% of low-melting-point hydrophilic polyester; 0.4-1.1% of nano titanium dioxide; 0.02-0.03% of graphene oxide; the melting point of the low-melting-point hydrophilic ester is 120-145 ℃; the soft segment of the thermoplastic polyurethane consists of polyester dihydric alcohol prepared by in-situ polymerization of graphene oxide; the low-melting-point hydrophilic polyester comprises 10-15% by mass of polyether glycol, 10-15% by mass of adipic acid, 50-60% by mass of terephthalic acid and 10-30% by mass of ethylene glycol; the nano titanium dioxide is uniformly dispersed in the low-melting-point hydrophilic polyester. The invention also relates to a preparation method of the polyester staple fiber. The antibacterial low-melting-point polyester staple fiber and the preparation method thereof have the advantages of high efficiency, high technical content, environmental friendliness, differentiation, mass production and the like.
Description
Technical Field
The invention relates to the technical field of polyester staple fiber processing, in particular to an antibacterial low-melting-point polyester staple fiber and a preparation method thereof.
Background
With the improvement of living standard, people are more and more conscious of health and hygiene, and research and development of various antibacterial fibers and textiles are more and more emphasized. The PET fiber is one of the main raw materials of the antibacterial fabric. There are two main methods for producing antibacterial fibers. One method is a functionalization technology for adding functional powder into raw materials: namely, the powder with the antibacterial function is mixed with the polymer raw material, so that the fiber with various functions is obtained after spinning. The other method is to carry out post-treatment on the fiber to obtain the fiber with special functions, but because the molecular structure of PET does not have a reactive side group, the PET is difficult to carry out antibacterial finishing by adopting a surface grafting reaction technology, the antibacterial agent is prepared into antibacterial master batches and then mixed with PET slices, and the main method for preparing the antibacterial PET fiber is blending spinning.
The composite spinning method is characterized by that it utilizes the fibre containing antibacterial component and other fibre or fibre containing no antibacterial component to make them into the invented antibacterial fibre with skin-core type, parallel type, mosaic type, hollow multi-core type and other structure by means of composite spinning component, and adopts the production process of using the mixture of antibacterial agent and PET slice as skin layer, using general PET slice as core layer and using composite spinning process to obtain the invented composite antibacterial polyester fibre, and its antibacterial fibre uses antibacterial mother granules as skin layer, and its raw material is core layer, and its antibacterial agent is only distributed in the skin layer of the fibre, so that compared with the blended spinning method the dosage of antibacterial agent is less, so that it can reduce the influence of introduction of antibacterial agent on the physical and mechanical properties of the finished fibre, but the spinneret plate has high processing difficulty and high production cost.
Disclosure of Invention
The invention aims to provide an antibacterial low-melting-point polyester staple fiber.
In order to achieve the above purpose, the first purpose of the present invention is to provide an antibacterial low-melting point polyester staple fiber, which comprises the following components in parts by weight:
34-43% of thermoplastic polyurethane;
56.26-66.52% of low-melting-point hydrophilic polyester;
0.4-1.1% of nano titanium dioxide;
0.02-0.03% of graphene oxide;
the melting point of the low-melting-point hydrophilic ester is 120-145 ℃;
the soft segment of the thermoplastic polyurethane consists of polyester dihydric alcohol prepared by in-situ polymerization of graphene oxide;
the low-melting-point hydrophilic polyester comprises 10-15% by mass of polyether glycol, 10-15% by mass of adipic acid, 50-60% by mass of terephthalic acid and 10-30% by mass of ethylene glycol;
the nano titanium dioxide is uniformly dispersed in the low-melting-point hydrophilic polyester.
The second purpose of the invention is to provide a preparation method of antibacterial low-melting point polyester staple fiber, which comprises the following steps,
s1, mixing raw materials of ethylene glycol, terephthalic acid, graphene oxide and an antimony catalyst at 60-75 ℃ for 150-200 min to prepare slurry, reacting the slurry at 270-280 ℃ for 300-320 min, and removing water generated by polycondensation to obtain a prepolymer;
s2, reacting the prepolymer at 280-285 ℃ for 50-60 min, wherein the pressure is 1-2 kpa absolute; then reacting for 10-30 min at 280-285 ℃ under the absolute pressure of 80-120 pa to obtain polyester diol; carrying out melt polymerization on 70-80 wt%, 10-15 wt%, 3-5 wt% and 0.3-0.5 wt% of polyester diol, 4' -diphenylmethane diisocyanate, butanediol and ethanolamine at 130-160 ℃ to obtain a thermoplastic polyurethane fiber-forming polymer;
s3, mixing 10-15%, 50-60% and 10-30% of ethylene glycol, terephthalic acid, polyether glycol, adipic acid and nano titanium dioxide by mass percentage, wherein the sum of the percentages is 100%, at 50-70 ℃ for 120-180 min to prepare slurry, wherein the molar ratio of carboxyl to hydroxyl is 1.05: 1-1.10: 1, and the dosage of ethylene glycol antimony serving as a catalyst is 200-350 ppm;
s4, reacting the slurry for 280-320 min at 260-265 ℃, and removing water generated by a polycondensation reaction to obtain a polycondensate; reacting the polycondensate at 270-280 ℃ for 100-110 min, wherein the pressure is 1-2 kpa absolute; then reacting for 180-200 min at 280-285 ℃ under the absolute pressure of 100-120 pa to obtain the low-melting-point hydrophilic polyester fiber-forming polymer;
s5, respectively feeding the prepared thermoplastic polyurethane fiber-forming polymer and the prepared low-melting-point hydrophilic polyester fiber-forming polymer into a screw, melting by a screw extruder, statically mixing, filtering, feeding into a box metering pump for metering, extruding by a C-shaped hollow spinneret plate, and quenching by asymmetric ring blowing strong wind to obtain nascent fiber;
and S6, drawing the nascent fiber, heat setting, washing, drying and winding to obtain the antibacterial low-melting-point polyester staple fiber.
Specifically, the chain extender of the thermoplastic polyurethane is butanediol, and the end-capping agent is ethanolamine.
Preferably, the graphene oxide is uniformly dispersed in the thermoplastic polyurethane.
Preferably, in the step S5, the spinning temperature is 280-290 ℃.
Preferably, in step S6, the draft ratio after the draft is 5 to 6 times.
Compared with the prior art, the antibacterial low-melting-point polyester staple fiber and the preparation method thereof have the advantages that:
(1) various performance indexes of the produced product are stable and controllable, and meet the technical requirements of national antibacterial standards;
(2) the preparation method of the antibacterial low-melting-point polyester staple fiber has the advantages of high efficiency, high technical content, environmental friendliness, differentiation, mass production and the like.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
An antibacterial low-melting-point polyester staple fiber comprises the following components in parts by weight:
32% of thermoplastic polyurethane;
66.52% of low-melting point hydrophilic polyester;
0.4-1.1% of nano titanium dioxide;
0.02-0.03% of graphene oxide;
the melting point of the low-melting-point hydrophilic ester is 120-145 ℃;
the soft segment of the thermoplastic polyurethane consists of polyester dihydric alcohol prepared by in-situ polymerization of graphene oxide;
the low-melting-point hydrophilic polyester comprises 10-15% by mass of polyether glycol, 10-15% by mass of adipic acid, 50-60% by mass of terephthalic acid and 10-30% by mass of ethylene glycol;
the nano titanium dioxide is uniformly dispersed in the low-melting-point hydrophilic polyester.
A preparation method of antibacterial low-melting-point polyester staple fiber, which comprises the following steps,
s1, mixing raw materials of ethylene glycol, terephthalic acid, graphene oxide and an antimony catalyst at 60 ℃ for 200min to prepare slurry, reacting the slurry at 270 ℃ for 320min, and removing water generated by polycondensation reaction to obtain a prepolymer;
s2, reacting the prepolymer at 280 ℃ for 60min, wherein the pressure is 1-2 kpa absolute; then reacting for 10-30 min at 280-285 ℃ under the absolute pressure of 80-120 pa to obtain polyester diol; carrying out melt polymerization on 70-80 wt%, 10-15 wt%, 3-5 wt% and 0.3-0.5 wt% of polyester diol, 4' -diphenylmethane diisocyanate, butanediol and ethanolamine at 130-160 ℃ to obtain a thermoplastic polyurethane fiber-forming polymer;
s3, mixing 10-15%, 50-60% and 10-30% of ethylene glycol, terephthalic acid, polyether glycol, adipic acid and nano titanium dioxide by mass percentage, wherein the sum of the percentages is 100%, at 50-70 ℃ for 120-180 min to prepare slurry, wherein the molar ratio of carboxyl to hydroxyl is 1.05: 1-1.10: 1, and the dosage of ethylene glycol antimony is 200-350 ppm;
s4, reacting the slurry at 260 ℃ for 320min, and removing water generated by polycondensation reaction to obtain a polycondensate; reacting the polycondensate for 110min at 280 ℃, wherein the pressure is 1-2 kpa absolute; then reacting for 180min at 285 ℃, wherein the absolute pressure is 100-120 pa, and obtaining the low-melting-point hydrophilic polyester fiber-forming polymer;
s5, respectively feeding the prepared thermoplastic polyurethane fiber-forming polymer and the prepared low-melting-point hydrophilic polyester fiber-forming polymer into a screw, melting by a screw extruder, statically mixing, filtering, feeding into a box metering pump for metering, extruding by a C-shaped hollow spinneret plate, and quenching by asymmetric ring blowing strong wind to obtain nascent fiber;
and S6, drawing, heat setting, washing, drying and winding the nascent fiber to obtain the antibacterial low-melting-point polyester staple fiber.
The chain extender of the thermoplastic polyurethane is butanediol, and the end-capping agent is ethanolamine.
Wherein the graphene oxide is uniformly dispersed in the thermoplastic polyurethane.
In step S5, the spinning temperature is 280 ℃.
In step S6, the draft ratio after the draft is 5 times.
Example 2
An antibacterial low-melting-point polyester staple fiber comprises the following components in parts by weight:
32-43% of thermoplastic polyurethane;
56.26-66.52% of low-melting-point hydrophilic polyester;
0.4-1.1% of nano titanium dioxide;
0.02-0.03% of graphene oxide;
the melting point of the low-melting-point hydrophilic ester is 120-145 ℃;
the soft segment of the thermoplastic polyurethane consists of polyester dihydric alcohol prepared by in-situ polymerization of graphene oxide;
the low-melting-point hydrophilic polyester comprises 10-15% by mass of polyether glycol, 10-15% by mass of adipic acid, 50-60% by mass of terephthalic acid and 10-30% by mass of ethylene glycol;
the nano titanium dioxide is uniformly dispersed in the low-melting-point hydrophilic polyester.
A preparation method of antibacterial low-melting-point polyester staple fiber comprises the following steps,
s1, mixing raw materials of ethylene glycol, terephthalic acid, graphene oxide and an antimony catalyst at 70 ℃ for 180min to prepare slurry, reacting the slurry at 275 ℃ for 310min, and removing water generated by polycondensation reaction to obtain a prepolymer;
s2, reacting the prepolymer at 282 ℃ for 55min, wherein the pressure is 1-2 kpa absolute; then reacting for 20min at 283 ℃ under the absolute pressure of 80-120 pa to obtain polyester diol; carrying out melt polymerization on 70-80 wt%, 10-15 wt%, 3-5 wt% and 0.3-0.5 wt% of polyester diol, 4' -diphenylmethane diisocyanate, butanediol and ethanolamine at 130-160 ℃ to obtain a thermoplastic polyurethane fiber-forming polymer;
s3, mixing 10-15%, 50-60% and 10-30% of ethylene glycol, terephthalic acid, polyether glycol, adipic acid and nano titanium dioxide by mass percentage, wherein the sum of the percentages is 100%, at 50-70 ℃ for 120-180 min to prepare slurry, wherein the molar ratio of carboxyl to hydroxyl is 1.05: 1-1.10: 1, and the dosage of ethylene glycol antimony serving as a catalyst is 200-350 ppm;
s4, reacting the slurry at 262 ℃ for 300min, and removing water generated by polycondensation reaction to obtain a polycondensate; reacting the polycondensate at 275 ℃ for 105min, wherein the absolute pressure is 1-2 kpa; then reacting for 190min at 282 ℃ under the absolute pressure of 100-120 pa to obtain the low-melting-point hydrophilic polyester fiber-forming polymer;
s5, respectively feeding the prepared thermoplastic polyurethane fiber-forming polymer and the prepared low-melting-point hydrophilic polyester fiber-forming polymer into a screw, melting by a screw extruder, statically mixing, filtering, feeding into a box metering pump for metering, extruding by a C-shaped hollow spinneret plate, and quenching by asymmetric ring blowing strong wind to obtain nascent fiber;
and S6, drawing the nascent fiber, heat setting, washing, drying and winding to obtain the antibacterial low-melting-point polyester staple fiber.
The chain extender of the thermoplastic polyurethane is butanediol, and the end-capping agent is ethanolamine.
Wherein the graphene oxide is uniformly dispersed in the thermoplastic polyurethane.
In step S5, the spinning temperature was 285 ℃.
In step S6, the draft ratio after the draft is 6 times.
Example 3
An antibacterial low-melting-point polyester staple fiber comprises the following components in parts by weight:
32-43% of thermoplastic polyurethane;
56.26-66.52% of low-melting-point hydrophilic polyester;
0.4-1.1% of nano titanium dioxide;
0.02-0.03% of graphene oxide;
the melting point of the low-melting-point hydrophilic ester is 120-145 ℃;
the soft segment of the thermoplastic polyurethane consists of polyester dihydric alcohol prepared by in-situ polymerization of graphene oxide;
the low-melting-point hydrophilic polyester comprises 10-15% by mass of polyether glycol, 10-15% by mass of adipic acid, 50-60% by mass of terephthalic acid and 10-30% by mass of ethylene glycol;
the nano titanium dioxide is uniformly dispersed in the low-melting-point hydrophilic polyester.
A preparation method of antibacterial low-melting-point polyester staple fiber comprises the following steps,
s1, mixing the raw materials of ethylene glycol, terephthalic acid, graphene oxide and an antimony catalyst at 75 ℃ for 150min to prepare slurry, reacting the slurry at 280 ℃ for 300min, and removing water generated by polycondensation reaction to obtain a prepolymer;
s2, reacting the prepolymer at 285 ℃ for 50min, wherein the pressure is 1-2 kpa absolute; then reacting for 10min at 285 ℃, wherein the absolute pressure is 80-120 pa, and obtaining polyester diol; carrying out melt polymerization on 70-80 wt%, 10-15 wt%, 3-5 wt% and 0.3-0.5 wt% of polyester diol, 4' -diphenylmethane diisocyanate, butanediol and ethanolamine at 130-160 ℃ to obtain a thermoplastic polyurethane fiber-forming polymer;
s3, mixing 10-15%, 50-60% and 10-30% of ethylene glycol, terephthalic acid, polyether glycol, adipic acid and nano titanium dioxide by mass percentage, wherein the sum of the percentages is 100%, at 70 ℃ for 120min to prepare slurry, wherein the molar ratio of carboxyl to hydroxyl is 1.05: 1-1.10: 1, and the dosage of ethylene glycol antimony is 200-350 ppm;
s4, reacting the slurry for 280min at 265 ℃, and removing water generated by polycondensation reaction to obtain a polycondensate; reacting the polycondensate at 280 ℃ for 100min, wherein the absolute pressure is 1-2 kpa; then reacting for 180min at 285 ℃, wherein the absolute pressure is 100-120 pa, and obtaining the low-melting-point hydrophilic polyester fiber-forming polymer;
s5, respectively feeding the prepared thermoplastic polyurethane fiber-forming polymer and the prepared low-melting-point hydrophilic polyester fiber-forming polymer into a screw, melting by a screw extruder, statically mixing, filtering, feeding into a box metering pump for metering, extruding by a C-shaped hollow spinneret plate, and quenching by asymmetric circular blowing strong wind to obtain nascent fiber;
and S6, drawing, heat setting, washing, drying and winding the nascent fiber to obtain the antibacterial low-melting-point polyester staple fiber.
The chain extender of the thermoplastic polyurethane is butanediol, and the end-capping agent is ethanolamine.
Wherein the graphene oxide is uniformly dispersed in the thermoplastic polyurethane.
In step S5, the spinning temperature was 290 ℃.
In step S6, the draft ratio after the draft is 6 times.
The following test results, which are shown in table 1, were obtained by subjecting the polyester fabrics spun from the polyester fibers prepared in examples 1 to 3 and comparative example 1 to moisture absorption and heat insulation tests according to the JISL1907-2010 method and the stationary plate method, respectively.
TABLE 1
The test data show that the antibacterial low-melting-point polyester staple fiber prepared by the invention has very good moisture absorption, heat insulation and antibacterial properties.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. The antibacterial low-melting-point polyester staple fiber is characterized by comprising the following components in parts by weight:
34-43% of thermoplastic polyurethane;
56.26-66.52% of low-melting-point hydrophilic polyester;
0.4-1.1% of nano titanium dioxide;
0.02-0.03% of graphene oxide;
the melting point of the low-melting-point hydrophilic ester is 120-145 ℃;
the soft segment of the thermoplastic polyurethane consists of polyester dihydric alcohol prepared by in-situ polymerization of graphene oxide;
the low-melting-point hydrophilic polyester comprises 10-15% by mass of polyether glycol, 10-15% by mass of adipic acid, 50-60% by mass of terephthalic acid and 10-30% by mass of ethylene glycol;
the nano titanium dioxide is uniformly dispersed in the low-melting-point hydrophilic polyester.
2. The method for preparing antibacterial low-melting-point polyester staple fiber according to claim 1, comprising the following steps,
s1, mixing raw materials of ethylene glycol, terephthalic acid, graphene oxide and an antimony catalyst at 60-75 ℃ for 150-200 min to prepare slurry, reacting the slurry at 270-280 ℃ for 300-320 min, and removing water generated by polycondensation to obtain a prepolymer;
s2, reacting the prepolymer at 280-285 ℃ for 50-60 min, wherein the pressure is 1-2 kpa absolute; then reacting for 10-30 min at 280-285 ℃ under the absolute pressure of 80-120 pa to obtain polyester diol; carrying out melt polymerization on 70-80 wt%, 10-15 wt%, 3-5 wt% and 0.3-0.5 wt% of polyester diol, 4' -diphenylmethane diisocyanate, butanediol and ethanolamine at 130-160 ℃ to obtain a thermoplastic polyurethane fiber-forming polymer;
s3, mixing 10-15%, 50-60% and 10-30% of ethylene glycol, terephthalic acid, polyether glycol, adipic acid and nano titanium dioxide by mass percentage, wherein the sum of the percentages is 100%, at 50-70 ℃ for 120-180 min to prepare slurry, wherein the molar ratio of carboxyl to hydroxyl is 1.05: 1-1.10: 1, and the dosage of ethylene glycol antimony serving as a catalyst is 200-350 ppm;
s4, reacting the slurry for 280-320 min at 260-265 ℃, and removing water generated by a polycondensation reaction to obtain a polycondensate; reacting the polycondensate at 270-280 ℃ for 100-110 min, wherein the absolute pressure is 1-2 kpa; then reacting for 180-200 min at 280-285 ℃ under the absolute pressure of 100-120 pa to obtain the low-melting-point hydrophilic polyester fiber-forming polymer;
s5, respectively feeding the prepared thermoplastic polyurethane fiber-forming polymer and the prepared low-melting-point hydrophilic polyester fiber-forming polymer into a screw, melting by a screw extruder, statically mixing, filtering, feeding into a box metering pump for metering, extruding by a C-shaped hollow spinneret plate, and quenching by asymmetric ring blowing strong wind to obtain nascent fiber;
and S6, drawing, heat setting, washing, drying and winding the nascent fiber to obtain the antibacterial low-melting-point polyester staple fiber.
3. The antimicrobial low melting point polyester staple fiber of claim 2, wherein the chain extender of the thermoplastic polyurethane is butanediol and the end capping agent is ethanolamine.
4. The antibacterial low-melting-point polyester staple fiber according to claim 2, wherein the graphene oxide is uniformly dispersed in the thermoplastic polyurethane.
5. The antibacterial low-melting-point polyester staple fiber according to claim 3, wherein in step S5, the spinning temperature is 280-290 ℃.
6. The antibacterial low-melting-point polyester staple fiber according to claim 4, wherein in step S6, the draft ratio after the draft is 5 to 6 times.
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| CN202210932533.8A CN115074858A (en) | 2022-08-04 | 2022-08-04 | Antibacterial low-melting-point polyester staple fiber and preparation method thereof |
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| CN202210932533.8A CN115074858A (en) | 2022-08-04 | 2022-08-04 | Antibacterial low-melting-point polyester staple fiber and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014146591A1 (en) * | 2013-03-21 | 2014-09-25 | 宁波大发化纤有限公司 | Skin-core type recycled polyester staple fiber and preparation method thereof |
| CN113322543A (en) * | 2021-06-22 | 2021-08-31 | 浙江正凯化纤有限公司 | Ice-cool composite polyester fiber and preparation method thereof |
-
2022
- 2022-08-04 CN CN202210932533.8A patent/CN115074858A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014146591A1 (en) * | 2013-03-21 | 2014-09-25 | 宁波大发化纤有限公司 | Skin-core type recycled polyester staple fiber and preparation method thereof |
| CN113322543A (en) * | 2021-06-22 | 2021-08-31 | 浙江正凯化纤有限公司 | Ice-cool composite polyester fiber and preparation method thereof |
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Application publication date: 20220920 |