CN116516515A - Preparation method of boron nitride modified polyphenylene sulfide fiber and product thereof - Google Patents
Preparation method of boron nitride modified polyphenylene sulfide fiber and product thereof Download PDFInfo
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- CN116516515A CN116516515A CN202310576781.8A CN202310576781A CN116516515A CN 116516515 A CN116516515 A CN 116516515A CN 202310576781 A CN202310576781 A CN 202310576781A CN 116516515 A CN116516515 A CN 116516515A
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- 239000000835 fiber Substances 0.000 title claims abstract description 68
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000004734 Polyphenylene sulfide Substances 0.000 title claims abstract description 51
- 229920000069 polyphenylene sulfide Polymers 0.000 title claims abstract description 51
- 229910052582 BN Inorganic materials 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 36
- 229920005989 resin Polymers 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000002788 crimping Methods 0.000 claims abstract description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000009998 heat setting Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000007493 shaping process Methods 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000002074 melt spinning Methods 0.000 claims abstract description 8
- 238000010583 slow cooling Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000007711 solidification Methods 0.000 claims abstract description 3
- 230000008023 solidification Effects 0.000 claims abstract description 3
- 238000001291 vacuum drying Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 9
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 23
- 238000001514 detection method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- -1 Polytetrafluoroethylene Polymers 0.000 description 2
- 239000013065 commercial product Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Chemical group 0.000 description 1
- 229920013632 Ryton Polymers 0.000 description 1
- 239000004736 Ryton® Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 125000004423 acyloxy group Chemical group 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920013744 specialty plastic Polymers 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- 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
- 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
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
- D02G1/205—After-treatments for fixing crimp or curl
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
- D02J1/228—Stretching in two or more steps, with or without intermediate steps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a preparation method of boron nitride modified polyphenylene sulfide fibers and products thereof, belonging to the technical field of special fiber manufacturing. The preparation method comprises the steps of firstly modifying boron nitride powder by using a silane coupling agent, then mixing modified boron nitride with polyphenylene sulfide resin to obtain modified resin, then carrying out melt spinning, and obtaining formed fibers through heat setting, slow cooling area and cooling air solidification; the method comprises the steps of oiling formed fibers, winding, carrying out two-stage drafting and shaping, feeding the fibers into a crimping machine through a steam preheating box, carrying out relaxation heat shaping on the fibers, and cooling to obtain finished products. The modified polyphenylene sulfide fiber is obtained by taking the fiber-grade polyphenylene sulfide resin and boron nitride as raw materials through a melting-stretching process, and has no harsh reaction conditions. Boron nitride has excellent chemical corrosion resistance and oxidation resistance. The unique advantages of the polyphenylene sulfide fiber are utilized, and the oxidation resistance of the polyphenylene sulfide fiber is enhanced.
Description
Technical Field
The invention belongs to the technical field of special fiber manufacturing, and particularly relates to a preparation method of boron nitride modified polyphenylene sulfide fiber and a product thereof.
Background
Polyphenylene sulfide fibers (Polyphenylene Sulfide Fibre, PPS fibers) are a novel specialty plastic fiber, known by the foreign trade name, lyton (Ryton). Is prepared from polyphenylene sulfide resin (PPS) by conventional melt spinning method, and then post-stretching, crimping and cutting at high temperature. The short fiber has high strength, excellent heat stability and flame retardance, an oxygen index value of 34-35, a strength retention rate of 60% at 200 ℃, and no change in elongation at break; chemical resistance is inferior to Polytetrafluoroethylene (PTFE) fibers; has better textile processing performance. The product is mainly used for filtering high-temperature flue gas and special heat medium, drying belt in paper industry, cable wrapping adhesive layer, fireproof fabric and the like, and the woven fabric can be used for manufacturing advanced fire-fighting clothing.
However, in the using process of the PPS fiber, the temperature is higher than 180 ℃ because of the PPS macromolecular structure, the fiber can be subjected to serious oxidation phenomenon, the strength loss of the dust removal bag can reach 30% -55%, the using condition of the dust removal bag can not be met, and the effect and the service life of the dust removal bag are greatly reduced.
The boron nitride has excellent chemical corrosion resistance and oxidation resistance, and can improve the oxidation resistance of PPS fibers. Therefore, the research on the boron nitride silicon doped PPS fiber improves the oxidation resistance of the PPS fiber so as to obtain the PPS fiber with more practical performance in the aspect of dust removal bags, and has very important research value.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a preparation method of boron nitride modified polyphenylene sulfide fibers and a product thereof.
In order to achieve the above object, the present invention provides the following solutions:
the invention aims at providing a preparation method of boron nitride modified polyphenylene sulfide fibers, which comprises the following steps:
(1) Mixing boron nitride powder and a silane coupling agent in a high-speed mixer for 20-30 min at 15000-30000 r/min to obtain modified boron nitride; mixing the modified boron nitride and the polyphenylene sulfide resin in a high-speed centrifuge at 20000-30000 r/min for 20-30 min, and drying to obtain modified resin;
(2) Carrying out melt spinning on the modified resin at 300-330 ℃, then carrying out heat setting at 160-210 ℃, then passing through a slow cooling zone at 150-190 ℃, and then carrying out solidification by cooling air at 40-60 ℃ to obtain a formed fiber;
(3) And (3) oiling the formed fiber, winding, performing two-stage drafting and shaping, regulating and controlling the fiber through an amplitude modulation frame, entering a crimping machine through a steam preheating box, uniformly spreading the fiber which is discharged from the crimping machine on a link plate of a relaxation heat shaping machine under the action of a conveying yarn swinging machine, wherein the relaxation heat shaping temperature is 120-160 ℃, and cooling through forced air to obtain a finished product.
Further, the dosage of the silane coupling agent in the step (1) is 0.7-2.1% of the mass of the boron nitride powder, the boron nitride powder is a commercial product, and the mesh number is 10000-12000 mesh; the dosage of the modified boron nitride is 1-3% of the mass of the polyphenylene sulfide resin.
Further, the polyphenylene sulfide resin is a linear resin, and the melt index is 100-300 g/10min;
the silane coupling agent is a commercial product, and the molecular formula is RSiX 3 Wherein R represents amino, vinyl, epoxy, methylpropaneacyloxy, etc., and X represents a hydrolyzable group such as halogen, alkoxy, acyloxy, etc.
Further, the drying in the step (1) is vacuum drying, and the conditions of the vacuum drying are as follows: the temperature is 70-160 ℃, the vacuum degree is minus 0.06-minus 0.1MPa, and the time is 12-14 h.
Further, in the step (2), the modified resin is fed into a spinneret plate by a metering pump at a flow rate of 213.3-600 g/min, the aperture of the spinneret plate is 0.2-0.5 mm, the number of holes of the spinneret plate is 1600 holes, and the spinning speed is 600-1000 m/min.
Further, the winding speed in the step (3) is 600-1000 m/min.
Further, the two-stage drafting and sizing conditions in the step (3) are as follows: the first draft is 1.5-2, the draft speed is 150-200 m/min, the oil bath temperature is 80-120 ℃, the second draft is 1-1.5, the draft speed is 100-150 m/min, the superheated steam temperature is 120-200 ℃, and the fiber with the linear density of 2.2-2.22 dtex is obtained.
The second purpose of the invention is to provide the boron nitride modified polyphenylene sulfide fiber prepared by the preparation method.
There are no optional steps and alternative means in the above steps.
The invention has the beneficial effects that:
the modified polyphenylene sulfide fiber is obtained by taking the fiber-grade polyphenylene sulfide resin and boron nitride as raw materials through a melting-stretching process, and has no harsh reaction conditions. Boron nitride has excellent chemical corrosion resistance and oxidation resistance. The unique advantages of the polyphenylene sulfide fiber are utilized, and the oxidation resistance of the polyphenylene sulfide fiber is enhanced.
Detailed Description
The present invention will be described in further detail with reference to examples for better understanding of the technical scheme of the present invention to those skilled in the art.
Example 1
(1) Mixing boron nitride powder with a silane coupling agent at 15000r/min for 20min to obtain modified boron nitride; mixing the modified boron nitride with polyphenylene sulfide resin for 20min at 20000r/min, and vacuum drying to obtain modified resin, wherein the vacuum drying conditions are as follows: the temperature is 70 ℃, the vacuum degree is-0.06 MPa, and the time is 12 hours;
the dosage of the silane coupling agent is 0.7% of the mass of the boron nitride powder, and the mesh number of the boron nitride powder is 10000 mesh; the dosage of the modified boron nitride is 1% of the mass of the polyphenylene sulfide resin, the polyphenylene sulfide resin is linear resin, and the melt index is 100g/10min;
(2) Feeding the modified resin into a spinneret plate by a metering pump at a flow rate of 213.3g/min, wherein the melting temperature is 300 ℃, the aperture of the spinneret plate is 0.2mm, the number of the spinneret plate holes is 1600 holes, the spinning speed is 600m/min, carrying out melt spinning, then carrying out heat setting at 160 ℃, then passing through a slow cooling zone at 150 ℃, and then carrying out curing at 40 ℃ by cooling air to obtain a molded fiber;
(3) Oiling the formed fiber, winding at the speed of 750m/min, and performing two-stage drafting and shaping: the primary draft multiple is 1.5, the draft speed is 150m/min, the oil bath temperature is 80 ℃, the secondary draft multiple is 1, the draft speed is 100m/min, the superheated steam temperature is 120 ℃, and the fiber with the linear density of 2.22dtex is obtained.
And then the fibers are regulated and controlled by an amplitude modulation frame and enter a crimping machine through a steam preheating box, the crimping temperature is 120 ℃, the fibers which are discharged from the crimping machine are evenly paved on a link plate of a relaxation heat setting machine under the action of a conveying yarn swinging machine, the relaxation heat setting temperature is 120 ℃, and the finished product is obtained after forced air cooling.
After passing through a wire guide frame and a traction tension machine, the product is fed into a cutter from the tangential direction of a horizontally placed cutter head under uniform tension, the cutting length is 51mm, the product is distributed into a packer, and the product is compressed into bags, wherein the weight of each bag is 250kg.
And (3) product inspection: the boron nitride modified polyphenylene sulfide fiber was sent to a third party detection agency (Shandong Ming's new materials Co., ltd.) for comparative detection of the antioxidant capacity of the product fiber, and the results are shown in Table 1.
TABLE 1
Example 2
(1) Mixing boron nitride powder with a silane coupling agent at 20000r/min for 25min to obtain modified boron nitride; mixing the modified boron nitride with polyphenylene sulfide resin at 25000r/min for 25min, and vacuum drying to obtain modified resin, wherein the vacuum drying conditions are as follows: the temperature is 115 ℃, the vacuum degree is-0.08 MPa, and the time is 13h;
the dosage of the silane coupling agent is 1% of the mass of the boron nitride powder, and the mesh number of the boron nitride powder is 15000 mesh; the dosage of the modified boron nitride is 1.5% of the mass of the polyphenylene sulfide resin, the polyphenylene sulfide resin is linear resin, and the melt index is 200g/10min;
(2) Feeding the modified resin into a spinneret plate by a metering pump at a flow rate of 550g/min, wherein the melting temperature is 320 ℃, the aperture of the spinneret plate is 0.4mm, the number of the spinneret plate holes is 1600 holes, carrying out melt spinning under the condition that the spinning speed is 800m/min, carrying out heat setting at 180 ℃, then passing through a slow cooling zone at 170 ℃, and then carrying out curing at 50 ℃ by cooling air to obtain a molded fiber;
(3) Oiling the formed fiber, winding at 825m/min, and performing two-stage drafting and shaping: the primary draft multiple is 1.75, the draft speed is 175m/min, the oil bath temperature is 100 ℃, the secondary draft multiple is 1.25, the draft speed is 125m/min, the superheated steam temperature is 150 ℃, and the fiber with the linear density of 2.2dtex is obtained.
And then the fibers are regulated and controlled by an amplitude modulation frame and enter a crimping machine through a steam preheating box, the crimping temperature is 200 ℃, the fibers which are discharged from the crimping machine are evenly paved on a link plate of a relaxation heat setting machine under the action of a conveying yarn swinging machine, the relaxation heat setting temperature is 140 ℃, and the finished product is obtained after forced air cooling.
After passing through a wire guide frame and a traction tension machine, the product is fed into a cutter from the tangential direction of a horizontally placed cutter head under uniform tension, the cutting length is 51mm, the product is distributed into a packer, and the product is compressed into bags, wherein the weight of each bag is 250kg.
And (3) product inspection: the boron nitride modified polyphenylene sulfide fiber was sent to a third party detection agency (Shandong Ming's New Material Co., ltd.) for comparative detection of the antioxidant capacity of the product fiber, and the results are shown in Table 2.
TABLE 2
Example 3
(1) Mixing boron nitride powder with a silane coupling agent for 30min at 30000r/min to obtain modified boron nitride; mixing the modified boron nitride with polyphenylene sulfide resin for 30min at 30000r/min, and vacuum drying to obtain modified resin, wherein the vacuum drying conditions are as follows: the temperature is 160 ℃, the vacuum degree is-0.1 MPa, and the time is 14 hours;
the dosage of the silane coupling agent is 2.1 percent of the mass of the boron nitride powder, and the mesh number of the boron nitride powder is 12000 meshes; the dosage of the modified boron nitride is 3% of the mass of the polyphenylene sulfide resin, the polyphenylene sulfide resin is linear resin, and the melt index is 300g/10min;
(2) Feeding the modified resin into a spinneret plate by a metering pump at a flow rate of 600g/min, wherein the melting temperature is 330 ℃, the aperture of the spinneret plate is 0.5mm, the number of the spinneret plate holes is 1600 holes, carrying out melt spinning under the condition that the spinning speed is 1000m/min, then carrying out heat setting at 210 ℃, then passing through a slow cooling zone at 190 ℃, and then carrying out curing at 60 ℃ by cooling air to obtain a molded fiber;
(3) Oiling the formed fiber, winding at the winding speed of 900m/min, and performing two-stage drafting and shaping: the primary draft multiple is 2, the draft speed is 200m/min, the oil bath temperature is 120 ℃, the secondary draft multiple is 1.5, the draft speed is 150m/min, the superheated steam temperature is 200 ℃, and the fiber with the linear density of 2.2dtex is obtained.
And then the fibers are regulated and controlled by an amplitude modulation frame and enter a crimping machine through a steam preheating box, the crimping temperature is 240 ℃, the fibers which are discharged from the crimping machine are evenly paved on a link plate of a relaxation heat setting machine under the action of a conveying yarn swinging machine, the relaxation heat setting temperature is 160 ℃, and the finished product is obtained after forced air cooling.
After passing through a wire guide frame and a traction tension machine, the product is fed into a cutter from the tangential direction of a horizontally placed cutter head under uniform tension, the cutting length is 51mm, the product is distributed into a packer, and the product is compressed into bags, wherein the weight of each bag is 250kg.
And (3) product inspection: the boron nitride modified polyphenylene sulfide fiber was sent to a third party detection agency (Shandong Ming's New Material Co., ltd.) for comparative detection of the antioxidant capacity of the product fiber, and the results are shown in Table 3.
TABLE 3 Table 3
As can be seen from tables 1 to 3, the modified polyphenylene sulfide fiber is obtained by using the fiber-grade polyphenylene sulfide resin and boron nitride as raw materials through a melting-stretching process, and under the action of different oxidants, the retention rate of the modified polyphenylene sulfide fiber is obviously improved compared with that of the unmodified polyphenylene sulfide fiber, so that the oxidation resistance of the polyphenylene sulfide fiber can be enhanced by the modification method.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (7)
1. The preparation method of the boron nitride modified polyphenylene sulfide fiber is characterized by comprising the following steps of:
(1) Mixing boron nitride powder with a silane coupling agent for 20-30 min at 15000-30000 r/min to obtain modified boron nitride; mixing the modified boron nitride with polyphenylene sulfide resin for 20-30 min at 20000-30000 r/min, and drying to obtain modified resin;
(2) Carrying out melt spinning on the modified resin at 300-330 ℃, then carrying out heat setting at 160-210 ℃, then passing through a slow cooling zone at 150-190 ℃, and then carrying out solidification by cooling air at 40-60 ℃ to obtain a formed fiber;
(3) And (3) oiling the formed fiber, winding, carrying out two-stage drafting and shaping, then feeding the fiber into a crimping machine through a steam preheating box, carrying out relaxation heat shaping on the fiber at 120-240 ℃, and cooling to obtain a finished product.
2. The preparation method according to claim 1, wherein the silane coupling agent in the step (1) is used in an amount of 0.7-2.1% by mass of boron nitride powder, and the mesh number of the boron nitride powder is 10000-12000 mesh; the dosage of the modified boron nitride is 1-3% of the mass of the polyphenylene sulfide resin.
3. The method of claim 1, wherein the drying in step (1) is vacuum drying under the following conditions: the temperature is 70-160 ℃, the vacuum degree is minus 0.06-minus 0.1MPa, and the time is 12-14 h.
4. The method according to claim 1, wherein the melt spinning in the step (2) is carried out by feeding the modified resin into a spinneret plate at a flow rate of 213.3-600 g/min by a metering pump, wherein the diameter of the spinneret plate is 0.2-0.5 mm, the number of the spinneret plate holes is 1600 holes, and the spinning speed is 600-1000 m/min.
5. The method according to claim 1, wherein the winding speed in the step (3) is 600 to 1000m/min.
6. The method of claim 1, wherein the two-stage drawing and sizing conditions of step (3) are: the first draft is 1.5-2, the draft speed is 150-200 m/min, the oil bath temperature is 80-120 ℃, the second draft is 1-1.5, the draft speed is 100-150 m/min, the superheated steam temperature is 120-200 ℃, and the fiber with the linear density of 2.2-2.22 dtex is obtained.
7. A boron nitride modified polyphenylene sulfide fiber produced by the production process according to any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310576781.8A CN116516515A (en) | 2023-05-22 | 2023-05-22 | Preparation method of boron nitride modified polyphenylene sulfide fiber and product thereof |
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| CN202310576781.8A CN116516515A (en) | 2023-05-22 | 2023-05-22 | Preparation method of boron nitride modified polyphenylene sulfide fiber and product thereof |
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