CN114540976A - Production method of high-toughness high-strength polyphenylene sulfide monofilament - Google Patents
Production method of high-toughness high-strength polyphenylene sulfide monofilament Download PDFInfo
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- 229920000069 polyphenylene sulfide Polymers 0.000 title claims abstract description 108
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000010583 slow cooling Methods 0.000 claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
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- 238000002156 mixing Methods 0.000 claims abstract description 12
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- 238000009987 spinning Methods 0.000 claims description 25
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 9
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- 239000000463 material Substances 0.000 description 3
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- 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 description 1
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- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
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- 239000012467 final product Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
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- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000002464 physical blending Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003208 poly(ethylene sulfide) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
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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
- D01F6/94—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 other polycondensation products
-
- 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
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
- D01F11/08—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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)
- Artificial Filaments (AREA)
Abstract
The invention discloses a production method of a high-toughness high-strength polyphenylene sulfide monofilament, which comprises the steps of adding an additive, a main antioxidant, an auxiliary antioxidant and PPS slices into a double-screw extruder together for melt blending and extrusion, cooling with water, and finally granulating to obtain PPS modified slices; the PPS modified slice and the PPS slice are added into a single-screw extruder together for melt extrusion, a slow cooling device carries out slow cooling, then a liquid nitrogen refrigerator is adopted for cooling to obtain primary yarns, oiling is carried out, then the primary yarns are stretched after two passes, and the primary yarns are loosened and shaped, and finally the primary yarns are wound and collected to obtain the high-strength high-toughness PPS monofilaments. The product of the invention has excellent performance, the strength is 3.5-5.5cN/dtex, the elongation is 25-45%, and the knotting percentage is 55-90%.
Description
Technical Field
The invention relates to a production method of a high-toughness high-strength polyphenylene sulfide monofilament.
Background
Polyphenylene Sulfide (PPS) has good high temperature resistance, acid and alkali corrosion resistance, and flame retardant properties, but also has some obvious defects, which affect the spinnability and mechanical properties thereof, such as: 1. high melting point of raw material (T)m285 ℃ C.) and melt spinningThe fluidity is reduced due to the fact that the thermal oxidation crosslinking reaction is easy to occur with oxygen in the air in the process; PPS also because of its higher glass transition temperature (T)g85 ℃), when a conventional water cooling mode is adopted, the temperature of cooling water is set to be high (more than or equal to 85 ℃), normal stretching can be realized, but when the temperature of water is set to be too high, water is vaporized on the surface of a melt yarn due to overhigh temperature, so that more micropores are generated on the surface of the yarn, the mechanical property of the yarn is influenced, and the downstream weaving stability is further influenced; 3. the conventional cooling method is adopted to cool the melt strand, and simultaneously, another problem is that the primary strand is easy to crystallize, so that the grain size of crystals inside the strand is large, the crystallinity is large, and the subsequent further stretching is very unfavorable, and then the special molecular structure (one benzene ring is connected with one sulfur atom, as shown in figure 1) of the PPS is combined, so that the spun strand is large in brittleness, small in elongation and poor in toughness, and the smooth proceeding of downstream weaving is also influenced. Therefore, by combining the defects, the polyphenylene sulfide monofilament with high strength and high toughness needs to be modified and optimized in a spinning process.
Chinese patent CN1281798C, entitled "method for melt spinning, drawing and heat setting linear high molecular weight polyphenylene sulfide fiber", includes the steps of high temperature spinning, delayed heating and cooling, solidification and forming, heating at a slow speed, multi-stage drawing and multi-stage, multi-temperature zone heating relaxation/tension heat setting, wherein the temperature of the high temperature spinning is 380 ℃ plus 300 ℃, a delayed heating and cooling device is arranged at a position 0.1-10 cm away from the lower part of a spinneret plate, the heating temperature of the delayed heating and cooling device is 340 ℃ plus 120 ℃, and the spinning speed is 1200 m/min plus 800. The produced fiber has the characteristics of high breaking strength, low breaking elongation, high thermal stability and the like. However, polyphenylene sulfide is easy to generate oxidation crosslinking reaction in air due to a special molecular structure, and polyphenylene sulfide melt in a screw is unstable in fluidity, so that melt filaments from a spinneret hole are not uniform, and the final product performance is greatly influenced.
Chinese patent No. CN101024906A, "a polyphenylene sulfide fiber spinning method for improving melt fluidity", specifically, adding a fatty amide lubricant before polyphenylene sulfide spinning, wherein the weight of the added fatty amide lubricant is 0.1% -10% of the weight of a dry polyphenylene sulfide spinning slice, and then spinning according to a conventional polyphenylene sulfide melt spinning process. The melt spinning of the polyphenylene sulfide resin is carried out by the method, the polyphenylene sulfide fiber with less spinning broken ends, uniform fineness, high strength, good toughness and lower surface friction coefficient is obtained, meanwhile, the spinning temperature can be reduced to different degrees, the energy consumption is reduced, and the occurrence of high-temperature crosslinking reaction of the polyphenylene sulfide is avoided. Although the flowing stability of the polyphenylene sulfide melt is improved, the polyphenylene sulfide has high melting point and high spinning temperature, and after high-temperature melt filaments from the spinneret holes enter the cooling water tank, liquid around the melt filaments is easy to vaporize, so that the surface of the filaments is rough, the uniformity of the wire diameter of finished filaments is greatly influenced, and the stability of the performance of the finished filaments is also greatly influenced.
The Chinese patent with patent publication number CN102776601B, polyphenylene sulfide fiber spinning process, comprises the following steps: firstly, material pretreatment: mixing graphite powder with a silane coupling agent to obtain modified graphite; mixing the modified graphite and the polyphenylene sulfide resin at a high speed to obtain a mixed material; pre-crystallizing and drying the mixed material in a vacuum drying oven to obtain dry powder with water content less than 50 ppm; melting spinning: feeding the dry powder into a double-screw extruder for melt spinning to obtain a melt; slow cooling and cooling: forming filaments from the melt by a spinneret plate, then carrying out heat setting, then passing through a slow cooling area, and then carrying out solidification forming in a cooling area; fourthly, stretching and shaping: and (3) oiling and guiding the solidified and formed fibers, and then drafting and shaping the fibers in 3 paths to obtain short fibers with the linear density of 11 dtex. The invention has low cost, is easy for industrialized production, and the obtained fiber material has good performance. The method has the defects that the polyphenylene sulfide is modified by adopting a physical blending method, although the method has short process flow and simple equipment, the polyphenylene sulfide is difficult to blend uniformly, the modification additive is uniformly dispersed in a polymer matrix under the normal condition to really achieve the aim of improving the performance of the polymer, but the modification additive is difficult to disperse uniformly and disperse non-uniformly, impurities are formed in the additive with larger particles in the polymer matrix, and the aim of improving the performance of the polymer fiber cannot be achieved. But rather becomes a stress concentration point, and the performance of the produced fiber is reduced without being improved
The disadvantages of the prior art are as follows:
1. in the pure PPS melt spinning process, oxidation crosslinking or degradation reaction is easy to occur, so that the flowability of a PPS melt is unstable, the stability of the whole PPS spinning process is influenced, and meanwhile, the unevenness of the yarn diameter and the unevenness of the mechanical property (the unevenness of the strength and the toughness of the yarn) of a finished product are caused; the additives such as polyolefin wax, polyamide, polyester, metal stearate and the like used at present have poor compatibility with PPS, have no remarkable effect on improving the strength and toughness of monofilaments, and influence the performances of high temperature resistance, corrosion resistance, flame retardance and the like of PPS.
2. The melt directly enters a cooling water tank after flowing out of a spinneret orifice, the surface of the strand is crystallized firstly due to the lower temperature of the surface of the strand, and the surface of the strand cannot be crystallized immediately due to the higher temperature of an inner layer, so that the strand generates a skin-core structure.
3. After the melt flows out of the spinneret orifice, the melt directly enters a cooling water tank, and because the temperature gradient of the inner layer and the periphery of the strand silk is large, water on the surface of the strand silk is vaporized, so that more micropores are formed on the surface of the strand silk, the mechanical property of the finished product silk is greatly influenced, and the subsequent smooth weaving of the PPS fabric is further influenced.
4. After the melt flows out of the spinneret orifice, the melt directly enters a cooling water tank without slow cooling, the primary strand silk is crystallized faster, the size of crystallized particles is larger, the subsequent further stretching is not facilitated, and the mechanical property of finished yarns is further influenced.
Therefore, the PPS polymer needs to be modified and the spinning process needs to be optimized to produce the high-strength and high-toughness polyphenylene sulfide monofilament.
Disclosure of Invention
The invention aims to provide a production method of high-tenacity high-strength polyphenylene sulfide monofilament with high tenacity and high-strength performance.
The technical solution of the invention is as follows:
a production method of high-toughness high-strength polyphenylene sulfide monofilament is characterized by comprising the following steps: comprises the following steps: adding an additive HyPPS or PA66 or PET or polyolefin wax, a main antioxidant AO1179, an auxiliary antioxidant 168 and the PPS slices into a double-screw extruder together for melt blending and extrusion, wherein the temperature of the double screws is set to be 285-; the PPS modified slice and the PPS slice are added into a single screw extruder together for melt extrusion, the specification of a spinneret plate is 0.8mm 16 holes, the spinning temperature is 285-.
The additive HyPPS or PA66 or PET or polyolefin wax is added in an amount of 1-10% of the mass of the PPS slice.
The addition amount of the main antioxidant is 0.1-3% of the mass of the PPS slice, and the addition amount of the auxiliary antioxidant 168 is 0.1-3% of the mass of the PPS slice.
When stretching, the total stretching ratio is 4-6 times, the percentage of the first-stage stretching is 75-85%, the first-stage stretching temperature is 85-95 ℃, and the second-stage stretching temperature is 150-.
Adding high molecular polymer or low molecular polymer or inorganic nano-particles, PPS and an antioxidant, adding into a double-screw extruder together for melt blending, extruding and re-granulating to obtain PPS modified particles. The high molecular polymer comprises one or more of PA6, PA66, PET, PES, POK, PEEK and the like or elastomer, the low molecular polymer comprises hyperbranched PPS (HyPPS), hyperbranched PET, polyolefin wax and the like, and the inorganic nano-particles comprise nano SiO2Nano CaCO, nano-grade CaCO3And nano ZnO crystal whisker, etc., finally finding that the compatibility of HyPPS and PPS is best, greatly improving the fluidity of PPS in the melt spinning process,in order to prevent oxidation of the PPS melt in the spinning process, some antioxidants are required to be added, the antioxidants comprise two main antioxidants and auxiliary antioxidants, the main antioxidants comprise one or two of AO1179 or AO110, the auxiliary antioxidants are 168, and the main antioxidants and the auxiliary antioxidants are combined to prevent oxidation crosslinking reaction of the polymer melt in a screw barrel.
Hyperbranched polyphenylene sulfide (HyPPS) and PPS are adopted for melt blending, so that the flow stability of PPS melt is improved, the uniformity of filaments extruded from spinneret orifices is ensured, and the uniformity of finished monofilaments is finally ensured; the slow cooling process is adopted: the heat-preservation pipe sleeve is additionally arranged below the spinneret plate, so that the strand silk is in a windless area, the influence of the environment on the primary strand silk is reduced, the spinning speed is adjusted, the slow cooling height (the distance from the surface of the spinneret plate to the liquid level of a cooling water tank) is adjusted, the purpose of delaying the cooling of the primary strand silk is achieved, the uniformity of cooling of the inner layer and the outer layer of the primary strand silk is ensured, the uniformity of the orientation of the inner layer and the outer layer of the primary strand silk is ensured, and after the slow cooling, the quenching is carried out, so that the produced primary strand silk has fewer surface defects, low pre-orientation degree, fewer stress concentration points and small internal stress, can bear the high-rate drawing, and finally the PPS monofilament with higher strength and toughness is obtained; the slow cooling-shock cooling treated primary filament is adopted, and then a subsequent multi-stage drawing process is carried out, so that few or no cavities are generated in the monofilament body, and the strength and the toughness of the PPS monofilament are greatly improved. The crystallized particle size inside the filaments after slow cooling treatment is small, so that the filaments can be conveniently drawn in the next process, and the filaments after rapid cooling can not be crystallized and can be kept in the original state, thereby being more beneficial to the drawing process in the next process.
The invention has the advantages that:
1. the hyperbranched HyPPS is adopted to modify the melt flowability of the PPS, the compatibility of the additive and the PPS is better than general compatibility, and the melt flow stability is improved;
2. the slow cooling device is adopted, generally, when melt spinning is carried out, the cooling height of an air layer is prolonged to carry out slow cooling on the slivers, but the slivers are greatly influenced by the environment (temperature, humidity, wind speed and the like), and the slow cooling device is adopted in the method, so that the problems are avoided;
3. by adopting a slow cooling-quenching process, the internal part of the nascent strand silk is less crystallized or not crystallized before stretching, the size of the crystallized particles is minimum, the process is very beneficial to the subsequent stretching, and further the PPS monofilament product with high strength and high toughness can be obtained;
4. by adopting a slow cooling-quick cooling process, the melt is cooled at a low temperature, water attached to the surface of the melt wire cannot be vaporized, and the surface of the wire has no micropores and is smooth.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a process flow diagram of the present invention.
FIG. 2 is a schematic view of a screw spinning apparatus used in the present invention.
In the figure: 1-die head, 2-component, 3-spinneret plate, 4-melt strand, 5-slow cooling device, 6-cooling water tank and 7-freezing equipment.
The test method is as follows:
breaking strength test of monofilament: according to the standard of GB/T14344-2008 "test method for tensile property of chemical fiber filament", a strength test experiment is carried out under the conditions that the environmental temperature is 20 +/-2 ℃ and the relative humidity is (65 +/-2%), a desktop computer type strength tensile tester is used for testing, the average value is taken after five times of testing, the clamping distance is (500 +/-1.0) mm, and the tensile speed is 50 cm/min.
Linear density testing of monofilaments: the test is carried out according to the standard of GB/T14343-2008 chemical fiber filament yarn density test method
The knotting strength test method of the monofilament comprises the following steps: if a filament is loaded in a bent state it will break more easily than when straightened, because the breaking occurs through a high elongation of the surface layer of the fibre. This reflects the magnitude of the brittleness of the filaments. Physical properties such as fiber brittleness can be estimated as the percentage of the breaking strength of the filament measured in a knotted state to the linear strength of the fiber. The test environment conditions are that the temperature is 20 +/-2 ℃, the strength test experiment is carried out under the relative humidity of (65 +/-2)%, a desktop computer type strength tensile tester is adopted for testing, the five times of test are averaged, the clamping distance is (500 +/-1.0) mm, the clamped fibers are knotted at the middle part of an upper clamp and a lower clamp, the tensile speed is 50cm/min, and the measured data is the knotting strength.
Detailed Description
Example 1:
adding an additive HyPPS (the addition amount is 5 percent of the mass of the PPS slices), a main antioxidant AO1179 (the addition amount is 0.5 percent), an auxiliary antioxidant 168 (the addition amount is 0.5 percent) and the PPS slices into a double-screw extruder together for melt blending and extrusion, setting the temperature of the double screws to be 285 ℃ and 315 ℃, the rotating speed of a host machine to be 50Hz, cooling with water, setting the temperature of the water cooling to be 25 ℃, and finally granulating to obtain the PPS modified slices. The PPS modified slice and the PPS slice are added into a single screw extruder together for melt extrusion, the specification of a spinneret plate is 0.8mm x 16 holes, the spinning temperature is 285-.
Example 2:
adding additive polyethylene WAX PE-WAX (the addition amount is 6% of the mass of the PPS slices), main antioxidant AO1179 (the addition amount is 0.5% of the mass of the PPS slices), auxiliary antioxidant 168 (the addition amount is 0.5% of the mass of the PPS slices) and the PPS slices into a double-screw extruder together for melt blending and extrusion, wherein the temperature of the double screws is set to be 285-315 ℃, the rotating speed of a main machine is 50Hz, the water cooling temperature is 25 ℃, and finally, granulating to obtain the PPS modified slices. The PPS modified slice and the PPS slice are added into a single screw extruder together for melt extrusion, the spinning temperature is 285-325 ℃, a slow cooling device carries out slow cooling, the slow cooling height is 6cm, a refrigerating fluid is cooled, a liquid nitrogen refrigerator is adopted for cooling, the temperature of the refrigerating fluid is less than or equal to 0 ℃, primary yarns are obtained, oiling is carried out, then two-step post-drawing is carried out, the total drawing ratio is 5 times, the percentage of the primary drawing is 82%, the primary drawing temperature is 90 ℃, the secondary drawing temperature is 190 ℃, the relaxation setting is carried out, the setting temperature is 210 ℃, finally, the yarns are wound and collected, the high-strength and high-toughness PPS monofilaments are obtained, and the diameter is 0.25 mm.
Example 3:
adding additives of polyhexamethylene adipamide PA66 (the addition amount is 7% of the mass of the PPS slices), a main antioxidant AO1179 (the addition amount is 0.5% of the mass of the PPS slices), an auxiliary antioxidant 168 (the addition amount is 0.5% of the mass of the PPS slices) and the PPS slices into a double-screw extruder, melting, blending and extruding, wherein the temperature of the double screws is set to 285-315 ℃, the rotating speed of a main machine is 50Hz, cooling with water, the cooling temperature with water is 25 ℃, and finally granulating to obtain the PPS modified slices. The PPS modified slice and the PPS slice are added into a single screw extruder together for melt extrusion, the spinning temperature is 285-325 ℃, a slow cooling device carries out slow cooling, the slow cooling height is 9cm, a refrigerating fluid is used for cooling, a liquid nitrogen refrigerator is used for cooling, the temperature of the refrigerating fluid is less than or equal to 0 ℃, primary yarns are obtained, oiling is carried out, then the primary yarns are stretched after two times, the total stretching ratio is 6 times, the percentage of the primary yarns in the first-stage stretching is 78%, the first-stage stretching temperature is 90 ℃, the second-stage stretching temperature is 170 ℃, the primary yarns are relaxed and set, the setting temperature is 190 ℃, and finally the primary yarns are wound and collected to obtain the high-strength high-toughness PPS monofilaments, wherein the diameter is 0.25 mm.
Example 4:
adding additives of polyethylene terephthalate (PET) (the addition amount is 8% of the mass of the PPS slices), a main antioxidant AO1179 (the addition amount is 0.5% of the mass of the PPS slices), an auxiliary antioxidant 168 (the addition amount is 0.5% of the mass of the PPS slices) and the PPS slices into a double-screw extruder together for melting, blending and extruding, wherein the temperature of the double screws is set to be 285-315 ℃, the rotating speed of a main machine is 50Hz, the water cooling temperature is 25 ℃, and finally, granulating to obtain the PPS modified slices. The PPS modified slice and the PPS slice are added into a single screw extruder together for melt extrusion, the spinning temperature is 285-.
Example 5:
adding an additive HyPPS (the addition amount is 9% of the mass of the PPS slices), a main antioxidant AO1179 (the addition amount is 0.5% of the mass of the PPS slices), an auxiliary antioxidant 168 (the addition amount is 0.5% of the mass of the PPS slices) and the PPS slices into a double-screw extruder together for melt blending and extrusion, setting the temperature of the double screws to be 285-315 ℃, setting the rotating speed of a main machine to be 50Hz, cooling with water, setting the water cooling temperature to be 25 ℃, and finally granulating to obtain the PPS modified slices. Adding the PPS modified slice and the PPS slice into a single screw extruder for melt extrusion, wherein the specification of a spinneret plate is 0.8mm x 16 holes, the spinning temperature is 285-plus 325 ℃, after melt strands are discharged from the spinneret plate, slow cooling is carried out by a slow cooling device, the slow cooling height is 10cm, then the melt strands enter a cooling water tank, the cooling temperature is 85 ℃, primary yarns are obtained, oiling is carried out, then the primary yarns are stretched after two passes, the total stretching ratio is 5 times, the ratio of the first-stage stretching is 76%, the first-stage stretching temperature is 93 ℃, the second-stage stretching temperature is 155 ℃, the sizing is loosened, the sizing temperature is 199 ℃, and finally winding and collecting the yarns to obtain the high-strength high-toughness PPS monofilaments with the diameter of 0.25 mm.
Thus, the excellent technical effects of the present invention can be seen.
Claims (4)
1. A production method of high-toughness high-strength polyphenylene sulfide monofilament is characterized by comprising the following steps: comprises the following steps: adding additives HyPPS or PA66 or PET or polyolefin wax and a main antioxidant AO1179, an auxiliary antioxidant 168 and PPS slices into a double-screw extruder together for melt blending and extrusion, cooling with water at the temperature of 25-55 ℃, and finally granulating to obtain PPS modified slices; adding the PPS modified slice and the PPS slice into a single-screw extruder together for melt extrusion, spinning, slowly cooling by a slow cooling device with the slow cooling height of 5-10cm, cooling by a liquid nitrogen refrigerator with the temperature of the refrigerator being less than or equal to 0 ℃ to obtain primary yarns, oiling, stretching twice, loosening and setting with the total stretching ratio of 4-6 times and the setting temperature of 185-225 ℃, and finally winding and collecting the yarns to obtain the high-strength high-toughness PPS monofilaments.
2. The method for producing high tenacity high strength polyphenylene sulfide monofilament as claimed in claim 1, wherein: the addition amount of HyPPS or PA66 or PET or polyolefin wax is 1-10% of the PPS slice mass.
3. The method for producing high tenacity high strength polyphenylene sulfide monofilament as claimed in claim 1, wherein: the addition amount of the main antioxidant is 0.1-3% of the mass of the PPS slice, and the addition amount of the auxiliary antioxidant 168 is 0.1-3% of the mass of the PPS slice.
4. The method for producing high tenacity high strength polyphenylene sulfide monofilament as claimed in claim 1, wherein: when stretching, the total stretching ratio is 3.5-6.5 times, the percentage of the first-stage stretching is 75-85%, the first-stage stretching temperature is 85-95 ℃, and the second-stage stretching temperature is 150-.
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| CN117107378A (en) * | 2023-10-12 | 2023-11-24 | 山东明化新材料有限公司 | Equipment and spinning method for spinning modified polyphenylene sulfide composite fiber |
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