CN114032626A - Flame-retardant polyester FDY (fully drawn yarn) and preparation method thereof - Google Patents
Flame-retardant polyester FDY (fully drawn yarn) and preparation method thereof Download PDFInfo
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- CN114032626A CN114032626A CN202111534175.7A CN202111534175A CN114032626A CN 114032626 A CN114032626 A CN 114032626A CN 202111534175 A CN202111534175 A CN 202111534175A CN 114032626 A CN114032626 A CN 114032626A
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- 239000003063 flame retardant Substances 0.000 title claims abstract 19
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract 17
- 229920000728 polyester Polymers 0.000 title claims abstract 14
- 238000002360 preparation method Methods 0.000 title claims abstract 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract 9
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims abstract 6
- 239000000022 bacteriostatic agent Substances 0.000 claims abstract 4
- 239000002270 dispersing agent Substances 0.000 claims abstract 4
- 239000002131 composite material Substances 0.000 claims abstract 2
- 239000002994 raw material Substances 0.000 claims abstract 2
- 238000006243 chemical reaction Methods 0.000 claims 3
- 238000006068 polycondensation reaction Methods 0.000 claims 3
- 229920000642 polymer Polymers 0.000 claims 3
- 239000004114 Ammonium polyphosphate Substances 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 2
- 229920002101 Chitin Polymers 0.000 claims 2
- 229920002292 Nylon 6 Polymers 0.000 claims 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 2
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims 2
- 229920001276 ammonium polyphosphate Polymers 0.000 claims 2
- 229910052799 carbon Inorganic materials 0.000 claims 2
- 239000004005 microsphere Substances 0.000 claims 2
- 238000003756 stirring Methods 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical group [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims 1
- 229920004934 Dacron® Polymers 0.000 abstract 2
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000005253 cladding Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
Classifications
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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
-
- 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
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The application relates to a flame-retardant polyester FDY (fully drawn yarn) and a preparation method thereof, relating to the technical field of polyester production; the composite material comprises the following raw materials in parts by weight: 370 parts of terephthalic acid, 430 parts of ethylene glycol 360, 4-20 parts of a dispersing agent, 150 parts of a flame retardant 130 and 2-4 parts of a bacteriostatic agent; this application has and reaches under certain condition when the temperature, and the fire retardant on dacron FDY silk top layer can form the carbon-layer cladding on the surface of dacron FDY silk to isolated external high temperature and oxygen, and then reach fire-retardant effect.
Description
Technical Field
The application relates to the technical field of polyester production, in particular to a flame-retardant polyester FDY (fully drawn yarn) and a preparation method thereof.
Background
The drawing effect called FDY is introduced in the spinning process, which is beneficial to improving the orientation degree and the crystallinity of the winding yarn, and the fabric made of the terylene FDY is smooth and soft and is widely applied to the clothing and home textile industries.
Chinese patent document CN108660785A discloses a far infrared polyester yarn, which comprises a far infrared material layer and a polyester yarn body, wherein the polyester yarn body is woven by warp and weft; when in use, the warm-keeping function is better.
In view of the above-mentioned related technologies, the inventor believes that the polyester yarn is flammable fiber, and is easily burned at an excessively high temperature, and thus needs to be improved.
Disclosure of Invention
In order to improve the flame retardance of the polyester yarns, the application provides the flame-retardant polyester FDY yarns and the preparation method thereof.
On the one hand, the flame-retardant polyester FDY adopts the following technical scheme:
the flame-retardant polyester FDY yarn comprises the following raw materials in parts by weight: 370 parts of terephthalic acid, 430 parts of ethylene glycol 360, 4-20 parts of a dispersing agent, 150 parts of a flame retardant 130 and 2-4 parts of a bacteriostatic agent.
By adopting the technical scheme, the polyester FDY yarns generated by the polycondensation reaction of the terephthalic acid and the ethylene glycol serving as raw materials are easy to burn under the condition that the temperature reaches a certain temperature, and the flame retardant is added into the raw materials, so that the flame retardant on the surface layer of the polyester FDY yarns at a high temperature can form a carbon layer to be coated on the surface of the polyester FDY yarns, thereby isolating the external high temperature and oxygen and further achieving the flame retardant effect; the bacteriostatic agent is dispersed in the polyester yarn, so that the prepared polyester FDY yarn contains bacteriostatic components, and the bacteriostatic performance of the polyester FDY yarn is improved.
Optionally, the dispersant is zinc stearate.
By adopting the technical scheme, the zinc stearate can promote the flame retardant to be uniformly dispersed, so that the polyester yarn with uniform and stable quality is obtained.
Optionally, the flame retardant comprises ammonium polyphosphate and carbon microspheres.
By adopting the technical scheme, after the temperature rises to a certain degree, the ammonium polyphosphate can not only release non-combustible gas, but also form a scorched substance on the surface of the polyester FDY yarn, so that the flame retardant effect is exerted, and the flame retardant effect is further exerted on the polyester FDY yarn; when the temperature rises to a certain degree, the carbon microspheres can be combusted, a carbon layer is formed on the surface of the polyester FDY, and oxygen and heat on the surface of the polyester FDY are difficult to enter the interior of the polyester FDY, so that the flame retardant effect is exerted, and the flame retardant effect is further exerted on the polyester FDY; the ammonium polyphosphate and the carbon microspheres are mutually cooperated, and the flame retardant property of the polyester FDY yarn is improved.
Optionally, the flame retardant further comprises polycaprolactam.
By adopting the technical scheme, after the temperature rises to a certain degree, the ammonium polyphosphate can burn, so that a char is formed on the surface of the polyester FDY, and the polycaprolactam helps to further carbonize the char, so that the flame retardant property of the polyester FDY is further improved.
Optionally, the mass ratio of the ammonium polyphosphate to the carbon microspheres to the polycaprolactam is (2-4) to (1-2).
By adopting the technical scheme, the mass ratio of the ammonium polyphosphate to the carbon microspheres to the polycaprolactam is controlled within the range, and the flame retardance of the prepared polyester FDY yarn is greatly improved.
Optionally, the bacteriostatic agent comprises chitin and nano-silver.
By adopting the technical scheme, the chitin has a natural antibacterial effect, and the antibacterial performance of the polyester FDY yarns is improved; silver ions in the nano silver have a bacteriostatic action and are beneficial to improving the bacteriostatic property of the polyester FDY yarns; the chitin enhances the combination effect of the polyester FDY yarns and the nano silver through the adsorption effect of the chitin, and is beneficial to reducing the loss of the bacteriostatic agent in the preparation and use processes, so that the bacteriostatic agent prepared by the synergistic cooperation of the chitin and the nano silver has high-efficiency bacteriostatic performance on the polyester FDY yarns.
Optionally, the mass ratio of the chitin to the nano-silver is 1 (0.4-0.6).
By adopting the technical scheme, the mass ratio of the chitin to the nano silver is controlled within the range, and the antibacterial activity of the prepared polyester FDY yarn is greatly improved.
On the other hand, the application provides a preparation method of the flame-retardant polyester FDY yarn, which comprises the following steps:
s1, stirring terephthalic acid and ethylene glycol at a certain temperature and pressure to perform prepolymerization reaction for 1-1.5h, then heating and boosting pressure to continue stirring to perform polycondensation reaction for 1.5-2h to obtain a polymer;
and S2, melting, blending and extruding the polymer, the dispersing agent, the flame retardant and the bacteriostatic agent, and cooling, oiling, stretching, sizing and winding the extruded polymer to obtain the polyester FDY yarn.
By adopting the technical scheme, the polymer is uniformly mixed with the dispersing agent, the flame retardant and the bacteriostatic agent, so that the polyester FDY yarn with uniform quality is prepared.
Optionally, the temperature of the prepolymerization reaction in the step S1 is 270-275 ℃, and the temperature of the polycondensation reaction is 280-285 ℃.
Optionally, the pressure of the prepolymerization reaction in the step S1 is 0.7-0.8MPa, and the pressure of the polycondensation reaction is 1.1-1.2 MPa.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the polyester FDY yarns generated by the polycondensation reaction of the terephthalic acid and the ethylene glycol serving as raw materials are easy to burn under the condition that the temperature reaches a certain value, and the flame retardant is added into the raw materials, so that the flame retardant on the surface layer of the polyester FDY yarns at a high temperature can form a carbon layer coated on the surface of the polyester FDY yarns, thereby isolating external high temperature and oxygen and further achieving the flame retardant effect.
2. The ammonium polyphosphate and the carbon microspheres are mutually cooperated to improve the flame retardant property of the polyester FDY, and the polycaprolactam helps to further carbonize a char generated after the ammonium polyphosphate is combusted, so that the flame retardant property of the polyester FDY is further improved.
3. The chitin enhances the combination effect of the polyester FDY yarns and the nano silver through the adsorption effect of the chitin, and is beneficial to reducing the loss of the bacteriostatic agent in the preparation and use processes, so that the bacteriostatic agent prepared by the synergistic cooperation of the chitin and the nano silver has high-efficiency bacteriostatic performance on the polyester FDY yarns.
Detailed Description
The embodiment of the application discloses fire-retardant dacron FDY silk.
Example 1
The polyester FDY yarn comprises the following raw materials in parts by weight: 300g of terephthalic acid, 360g of ethylene glycol, 4g of a dispersing agent, 130g of a flame retardant and 2g of a bacteriostatic agent, wherein the dispersing agent is zinc stearate, the flame retardant is prepared by mixing ammonium polyphosphate, carbon microspheres and polycaprolactam in a mass ratio of 4:1:1, and the bacteriostatic agent is prepared by mixing chitin and nano-silver in a mass ratio of 1: 0.4.
The preparation method of the polyester FDY comprises the following steps:
s1, stirring terephthalic acid and ethylene glycol at the temperature of 270 ℃ and the pressure of 0.7Mpa for a prepolymerization reaction for 1h, then raising the temperature to 280 ℃ and the pressure to 1.1Mpa, and continuing stirring for a polycondensation reaction for 1.5h to obtain a polymer;
and S2, melting, blending and extruding the polymer, the dispersing agent, the flame retardant and the bacteriostatic agent, and cooling, oiling, stretching, sizing and winding the extruded polymer to obtain the polyester FDY yarn.
Example 2
The polyester FDY yarn comprises the following raw materials in parts by weight: 370g of terephthalic acid, 430g of ethylene glycol, 20g of a dispersing agent, 150g of a flame retardant and 4g of a bacteriostatic agent, wherein the dispersing agent is zinc stearate, the flame retardant is prepared by mixing ammonium polyphosphate, carbon microspheres and polycaprolactam in a mass ratio of 2:1:2, and the bacteriostatic agent is prepared by mixing chitin and nano-silver in a mass ratio of 1: 0.6.
The preparation method of the polyester FDY comprises the following steps:
s1, stirring terephthalic acid and ethylene glycol at 275 ℃ and 0.8MPa for a prepolymerization reaction for 1h, then raising the temperature to 285 ℃ and raising the pressure to 1.2MPa, and continuing stirring for a polycondensation reaction for 2h to obtain a polymer;
and S2, melting, blending and extruding the polymer, the dispersing agent, the flame retardant and the bacteriostatic agent, and cooling, oiling, stretching, sizing and winding the extruded polymer to obtain the polyester FDY yarn.
Example 3
The polyester FDY yarn comprises the following raw materials in parts by weight: 335g of terephthalic acid, 395g of ethylene glycol, 12g of a dispersing agent, 140g of a flame retardant and 3g of a bacteriostatic agent, wherein the dispersing agent is zinc stearate, the flame retardant is prepared by mixing ammonium polyphosphate, carbon microspheres and polycaprolactam according to the mass ratio of 3:1:1.5, and the bacteriostatic agent is prepared by mixing chitin and nano-silver according to the mass ratio of 1: 0.5.
The preparation method of the polyester FDY comprises the following steps:
s1, stirring terephthalic acid and ethylene glycol at 273 ℃ and 0.75Mpa for a prepolymerization reaction for 1.25h, then raising the temperature to 283 ℃ and the pressure to 1.15Mpa, and continuing stirring for a polycondensation reaction for 1.75h to obtain a polymer;
and S2, melting, blending and extruding the polymer, the dispersing agent, the flame retardant and the bacteriostatic agent, and cooling, oiling, stretching, sizing and winding the extruded polymer to obtain the polyester FDY yarn.
Example 4
Example 4 differs from example 3 in that the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is 1:1: 1.5.
Example 5
Example 5 differs from example 3 in that the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is 5:1: 1.5.
Example 6
Example 6 differs from example 3 in that the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is 3:1: 0.5.
Example 7
Example 7 differs from example 3 in that the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is 3:1: 2.5.
Example 8
The difference between the embodiment 8 and the embodiment 3 is that the mass ratio of the chitin to the nano silver is 1: 0.3.
Example 9
Example 9 is different from example 3 in that the mass ratio of chitin to nano silver is 1: 0.7.
Comparative example 1
The difference between the comparative example 1 and the example 3 is that the mass ratio of the ammonium polyphosphate to the carbon microspheres to the polycaprolactam is 3:1:0.
Comparative example 2
The difference between the comparative example 2 and the example 3 is that the mass ratio of the ammonium polyphosphate to the carbon microspheres to the polycaprolactam is 0:1: 1.5.
Comparative example 3
The difference between the comparative example 3 and the example 3 is that the mass ratio of the ammonium polyphosphate to the carbon microspheres to the polycaprolactam is 3:0: 1.5.
Comparative example 4
Comparative example 4 differs from example 3 in that the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is 0:1: 1.5.
Comparative example 5
Comparative example 5 is different from example 3 in that only chitin is contained in the bacteriostatic agent.
Comparative example 6
Comparative example 6 is different from example 3 in that the bacteriostatic agent contains only nano silver.
Performance test
The polyester FDY yarns prepared in examples 1 to 9 and comparative examples 1 to 5 were sampled, and the samples were subjected to the following performance test tests.
1. Polyester yarn flame retardant property detection test
According to the national standard GB/T5455-2014, the ZY6014I-VB type textile vertical burning tester is used for igniting each tissue sample under the condition of the same environment and the same ignition time, the flame time, the smoldering time and the damage length of each tissue sample are detected and calculated, the shorter the flame time, the shorter the smoldering time and the damage length are, the better the flame retardant effect of the polyester FDY is, and the detection results are recorded in the table 1.
2. Polyester yarn antibacterial performance detection test
The aging resistance test was carried out by continuously irradiating the sample with a Japanese WEL-SUN-DC sunshine type weatherometer.
According to 50 times of washing in national standard FZ/T73023-2006 (oscillation method) appendix C, samples which are not aged and are aged are detected under the conditions of the same environment and the same time, the bacteriostasis rates of the samples on staphylococcus aureus and escherichia coli are detected, the higher the bacteriostasis rates on staphylococcus aureus and escherichia coli are, the better the bacteriostasis effect of the polyester FDY is, and the detection results are recorded in table 2.
TABLE 1
TABLE 2
Analysis of test data
As can be seen from tables 1 and 2, the continuous burning time of the polyester FDY yarns prepared in examples 1 to 9 is 2.9 to 3.7 seconds, the smoldering time is 1.9 to 2.8 seconds, the destroying length is 89 to 104mm, the bacteriostatic rate of the polyester FDY yarns on staphylococcus aureus in the initial state is 95.9 to 99.8 percent, and the bacteriostatic rate of escherichia coli is 95.3 to 99.7 percent, so that the polyester FDY yarns prepared in the application have better flame retardant effect and bacteriostatic effect.
As can be seen from tables 1 and 2, after 168 hours of the aging resistance test, the inhibition rates of the polyester FDY yarns prepared in examples 1 to 9 on staphylococcus aureus are 92.7% to 97.8%, and the inhibition rate of escherichia coli is 92.3% to 97.5%, so that the polyester FDY yarns prepared by the method have a lasting inhibition effect and can play a long-term effective inhibition role.
As can be seen from Table 1, the difference between examples 3 and 5 lies in the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam, when the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is adjusted to 1:1:1.5 in example 4, the flame continuation time of the prepared polyester FDY yarn is prolonged from 3.1s to 3.5s, the ignition time is prolonged from 2.1s to 2.7s, the destruction length is increased from 92mm to 99mm, and the flame retardant effect is obviously reduced; when the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is adjusted to 5:1:1.5 in example 5, the afterflame time of the prepared polyester FDY is prolonged from 3.1s to 3.6s, the ignition time is prolonged from 2.1s to 2.8s, the destruction length is increased from 92mm to 103mm, and the flame retardant effect is obviously reduced; the result shows that when the ammonium polyphosphate is too much or too little, the synergistic effect is influenced, and the flame retardant effect of the polyester FDY is reduced.
As can be seen from Table 1, the difference between the examples 3, 6 and 7 lies in the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam, when the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is adjusted to 3:1:0.5 in the example 6, the flame continuation time of the prepared polyester FDY yarn is prolonged from 3.1s to 3.4s, the ignition time is prolonged from 2.1s to 2.6s, the destruction length is increased from 92mm to 102mm, and the flame retardant effect is obviously reduced; when the mass ratio of ammonium polyphosphate, carbon microspheres and polycaprolactam is adjusted to 3:1:2.5 in example 7, the afterflame time of the prepared polyester FDY is prolonged from 3.1s to 3.7s, the ignition time is prolonged from 2.1s to 2.5s, the destruction length is increased from 92mm to 104mm, and the flame retardant effect is obviously reduced; the result shows that when the polycaprolactam is too much or too little, the synergistic effect is influenced, and the flame retardant effect of the polyester FDY yarn is reduced.
As can be seen from table 1, the difference between comparative example 1 and example 3 is that, in the case that no polycaprolactam is added to the flame retardant, the continuous burning time of the polyester FDY yarn prepared in comparative example 1 is prolonged from 3.1s to 4.1s, the ignition time is prolonged from 2.1s to 3.1s, the destruction length is increased from 92mm to 108mm, and the flame retardant effect is significantly reduced, because polycaprolactam is absent from the flame retardant, the char generated on the surface of the polyester yarn by heating ammonium polyphosphate cannot be further carbonized, and finally the flame retardant effect of the polyester FDY yarn prepared in comparative example 1 is reduced.
As can be seen from table 1, comparative example 2 is different from example 3 only in that, in the case that ammonium polyphosphate is not added to the flame retardant, the afterflame time of the polyester FDY yarn prepared in comparative example 2 is prolonged from 3.1s to 4.6s, the ignition time is prolonged from 2.1s to 3.7s, the destruction length is increased from 92mm to 114mm, and the flame retardant effect is significantly reduced because ammonium polyphosphate is absent in the flame retardant, on one hand, no combustible gas is generated, on the other hand, no way is available for forming a char on the surface of the polyester yarn, and thus no synergistic effect with polycaprolactam can be generated, and finally, the flame retardant effect of the polyester FDY yarn prepared in comparative example 2 is reduced.
As can be seen from Table 1, the difference between the comparative example 3 and the example 3 is that the flame-sustaining time of the polyester FDY yarn prepared in the comparative example 3 is prolonged from 3.1s to 4.4s, the ignition time is prolonged from 2.1s to 3.3s, the destruction length is increased from 92mm to 110mm, the flame-retardant effect is obviously reduced, because the flame retardant lacks the carbon microspheres, the synergistic effect is lost, and finally the flame-retardant effect of the polyester FDY yarn prepared in the comparative example 3 is reduced.
As can be seen from table 2, the difference between examples 3 and 8 lies in the mass ratio of the chitin to the nano-silver, when the mass ratio of the chitin to the nano-silver is adjusted to 1:0.3 in example 8, the bacteriostatic rate of the prepared polyester FDY filament on staphylococcus aureus in the initial state is reduced from 99.4% to 96.7%, the bacteriostatic rate on escherichia coli is reduced from 99.2% to 95.3%, the bacteriostatic rate on staphylococcus aureus is reduced from 97.4% to 94.5% after an aging resistance test for 168 hours, and the bacteriostatic rate on escherichia coli is reduced from 97.1% to 94.1%, which is because the nano-silver content in the bacteriostatic agent is too small, the bacteriostatic effect of the polyester FDY filament is reduced.
As can be seen from table 2, the difference between the embodiment 3 and the embodiment 9 is the mass ratio of the chitin to the nano-silver, when the embodiment 9 adjusts the mass ratio of the chitin to the nano-silver to 1:0.7, the bacteriostatic rate of the prepared polyester FDY filament to staphylococcus aureus in the initial state is reduced from 99.4% to 95.9%, the bacteriostatic rate to escherichia coli is reduced from 99.2% to 95.8%, the bacteriostatic rate to staphylococcus aureus is reduced from 97.4% to 92.7% after an aging resistance test for 168 hours, and the bacteriostatic rate to escherichia coli is reduced from 97.1% to 92.3%, which is because when the nano-silver content in the bacteriostatic agent is too much, the bacteriostatic effect of the polyester FDY filament is enhanced, but the content of the chitin in the bacteriostatic agent is reduced, so that the adsorption effect of the chitin to the nano-silver is reduced, and the loss rate of the nano-silver is increased, thereby reducing the effect of the FDY filament.
As can be seen from table 2, the difference between comparative example 4 and example 3 is that only under the condition that no nano silver is added to the bacteriostatic agent, the bacteriostatic rate of staphylococcus aureus in the initial state of the polyester FDY filament prepared in comparative example 4 is reduced from 99.4% to 60.4%, the bacteriostatic rate of escherichia coli is reduced from 99.2% to 63.2%, the bacteriostatic rate of staphylococcus aureus after 168 hours of the aging resistance test is reduced from 97.4% to 60.1%, the bacteriostatic rate of escherichia coli is reduced from 97.1% to 62.9%, and the bacteriostatic effect is significantly reduced, which may be that the bacteriostatic effect of the polyester FDY filament prepared in comparative example 4 is reduced because the bacteriostatic agent inhibits staphylococcus aureus and escherichia coli only through the bacteriostatic effect of chitin per se.
As can be seen from table 2, the difference between the comparative example 5 and the example 3 is only that under the condition that no chitin is added in the bacteriostatic agent, the bacteriostatic rate of the terylene FDY yarn prepared in the comparative example 5 on staphylococcus aureus is increased from 99.4% to 99.9% in the initial state, the bacteriostatic rate on escherichia coli is increased from 99.2% to 99.8%, and the bacteriostatic effect is enhanced; the antibacterial effect of the terylene FDY yarn prepared in the comparative example 5 in the initial state is enhanced due to the increased nano-silver content and the enhanced antibacterial effect; after the ageing resistance test is carried out for 168 hours, the bacteriostasis rate of the FDY yarn on staphylococcus aureus is reduced from 97.4% to 88.2%, the bacteriostasis rate of escherichia coli is reduced from 97.1% to 88.7%, and the bacteriostasis effect is obviously reduced, because chitin is lacked in the bacteriostat to adsorb nano silver, the nano silver dissipation speed is increased, and the bacteriostasis effect of the FDY yarn prepared in the comparative example 5 is reduced after the ageing resistance test is carried out for 168 hours.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The flame-retardant polyester FDY yarn is characterized in that: the composite material comprises the following raw materials in parts by mass: 370 parts of terephthalic acid, 430 parts of ethylene glycol 360, 4-20 parts of a dispersing agent, 150 parts of a flame retardant 130 and 2-4 parts of a bacteriostatic agent.
2. The flame-retardant polyester FDY yarn as claimed in claim 1, wherein: the dispersant is zinc stearate.
3. The flame-retardant polyester FDY yarn as claimed in claim 1, wherein: the flame retardant comprises ammonium polyphosphate and carbon microspheres.
4. The flame-retardant polyester FDY yarn as claimed in claim 3, wherein: the flame retardant also includes polycaprolactam.
5. The flame-retardant polyester FDY yarn as claimed in claim 4, wherein: the mass ratio of the ammonium polyphosphate to the carbon microspheres to the polycaprolactam is (2-4) to (1-2).
6. The flame-retardant polyester FDY yarn as claimed in claim 1, wherein: the bacteriostatic agent comprises chitin and nano-silver.
7. The flame-retardant polyester FDY yarn as claimed in claim 6, wherein: the mass ratio of the chitin to the nano-silver is 1 (0.4-0.6).
8. The preparation method of the flame-retardant polyester FDY yarn as claimed in claim 1, which is characterized in that: the method comprises the following steps:
s1, stirring terephthalic acid and ethylene glycol at a certain temperature and pressure to perform prepolymerization reaction for 1-1.5h, then heating and boosting pressure to continue stirring to perform polycondensation reaction for 1.5-2h to obtain a polymer;
and S2, melting, blending and extruding the polymer, the dispersing agent, the flame retardant and the bacteriostatic agent, and cooling, oiling, stretching, sizing and winding the extruded polymer to obtain the polyester FDY yarn.
9. The preparation method of the flame-retardant polyester FDY yarn as claimed in claim 8, wherein the preparation method comprises the following steps: the temperature of the prepolymerization reaction in the step S1 is 270-275 ℃, and the temperature of the polycondensation reaction is 280-285 ℃.
10. The preparation method of the flame-retardant polyester FDY yarn as claimed in claim 8, wherein the preparation method comprises the following steps: the pressure of the prepolymerization reaction in the step S1 is 0.7-0.8MPa, and the pressure of the polycondensation reaction is 1.1-1.2 MPa.
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Application publication date: 20220211 |