CN108611692B - Preparation method of high-single-fiber nylon 6 fiber based on high-speed spinning - Google Patents
Preparation method of high-single-fiber nylon 6 fiber based on high-speed spinning Download PDFInfo
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- 229920002292 Nylon 6 Polymers 0.000 title claims abstract description 159
- 239000000835 fiber Substances 0.000 title claims abstract description 141
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- 238000009987 spinning Methods 0.000 title claims abstract description 34
- 238000002425 crystallisation Methods 0.000 claims abstract description 50
- 230000008025 crystallization Effects 0.000 claims abstract description 50
- 238000004804 winding Methods 0.000 claims abstract description 44
- 239000000155 melt Substances 0.000 claims abstract description 38
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 238000007664 blowing Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 27
- 239000008367 deionised water Substances 0.000 claims description 16
- 229910021641 deionized water Inorganic materials 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000005469 granulation Methods 0.000 claims description 14
- 230000003179 granulation Effects 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 14
- 239000011259 mixed solution Substances 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 14
- 238000000967 suction filtration Methods 0.000 claims description 14
- 238000001291 vacuum drying Methods 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 12
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical group O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 8
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical group CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 8
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 8
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- CSNHNGDROQRZKT-UHFFFAOYSA-M benzyl-dimethyl-tetradecylazanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 CSNHNGDROQRZKT-UHFFFAOYSA-M 0.000 claims description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 238000002074 melt spinning Methods 0.000 claims description 4
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000009210 therapy by ultrasound Methods 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 abstract description 25
- 239000000463 material Substances 0.000 abstract description 25
- 238000002844 melting Methods 0.000 abstract description 13
- 230000008018 melting Effects 0.000 abstract description 13
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000004677 Nylon Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 229920001778 nylon Polymers 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 39
- 229910052782 aluminium Inorganic materials 0.000 description 39
- 238000010907 mechanical stirring Methods 0.000 description 12
- 239000004570 mortar (masonry) Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000048 melt cooling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—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 polyamides
-
- 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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
-
- 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
- D01D13/00—Complete machines for producing artificial threads
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a preparation method of high single-fiber nylon 6 fiber based on high-speed spinning, which comprises the following steps: mixing the dried nylon 6 slices with a crystallization speed regulating agent, putting the mixture into a feeder, feeding the material into a double-screw extruder for melt extrusion, and granulating to obtain nylon 6 master batches; blending and melting the nylon 6 master batch and the nylon 6 chips, extruding a melt from a spinneret orifice, then feeding the melt into a spinning channel, cooling the melt in the spinning channel by a side blowing device, oiling and drafting, then winding and forming, and finally obtaining the nylon composite material after fiber separation. The invention controls the crystallization rate of nylon 6 by controlling the content of the added crystallization speed regulating agent and the uniform dispersion of the crystallization speed regulating agent in the nylon 6 matrix, thereby realizing the uniform solidification of the melt in the forming process of the nylon 6 fiber, and ensuring that the prepared high single-fiber nylon 6 fiber has uniform structure and high fiber quality.
Description
Technical Field
The invention belongs to the field of chemical fiber preparation, and particularly relates to a preparation method of high-single-fiber nylon 6 fibers based on high-speed spinning.
Background
The nylon 6 fiber is a textile raw material, comprises monofilaments, folded yarns, special yarns and the like, and is mainly used for manufacturing sports clothes, scarves and the like in daily life; in the medical field, it is mainly used for making bandages; nylon 6 fiber products are more used for producing decorative cloth. The nylon 6 fiber has excellent physical properties such as high strength, good wear resistance and high moisture regain, and is widely applied to the fields of clothing (such as knitted underwear, socks, sports wear, ski shirts, tights and the like), industry, automobiles, aerospace and the like. In recent years, nylon 6 fibers have been developed and updated, and among them, the development of coarse denier nylon 6 fibers has become an important trend. The super-coarse denier fiber has high strength, low elongation at break and rough fiber style, and can be widely applied to the fields of bags, laces, decorative cloth, tents, sofa fabrics, carpets, filter cloth, high-strength sewing threads and the like.
At present, a very important problem exists in the production process of coarse denier nylon 6 fibers, namely melt cooling nonuniformity. The cooling speed of the cross-air cooling strand silk is too high, the uniformity of cooling is greatly influenced, the problems that the crystallinity and the orientation degree are different between the inside and the outside of the monofilament, the windward side and the leeward side are easily caused, a sheath-core structure is formed, the section of the finished monofilament is irregular, the post-processing of the fiber is not facilitated, and the performance and the quality of the product are influenced.
The patent application with the application number of CN104818538A discloses a production method of ultra-coarse denier nylon 6 flat yarns and the nylon 6 ultra-coarse denier flat yarns, and the problem of uneven cooling of coarse denier fibers is solved by adopting an inner ring air blowing device, changing the cooling length of an air window and bundling oil feeding points in the patent.
Application number CN 201110239259.8's patent application discloses a cooling method of blowing for spinning coarse denier fibre and device thereof, divide cooling process into 3 ~ 7 sections in the patent and go on, the side-blown temperature of each section reduces 3 ~ 10 ℃ in proper order, the gentle cooling to the silk bundle has been realized, make and be in high elastic state molecular chain and have abundant time to arrange, the emergence of the inconsistent phenomenon of coarse denier fibre inlayer and outer layer crystallization and orientation has been avoided, the problem of easily producing skin core structure has been overcome, the back machining efficiency and product quality have been improved. The invention patents can solve the problem of cooling the coarse denier fiber to a certain extent, but the production process is complex and the variety adaptability is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of high-single-fiber nylon 6 fibers based on high-speed spinning, and the method can accelerate the internal cooling crystallization speed of strand silk by adding a crystallization speed regulating agent based on surface organic treatment of inorganic powder, realize the internal and external crystallization uniformity of the strand silk, be beneficial to improving the quality of the high-single-fiber nylon 6 fibers, and solve the problem of uniform cooling of the high-single-fiber nylon 6 fibers on the premise of high-speed spinning.
The invention relates to a preparation method of high single-fiber nylon 6 fiber based on high-speed spinning, which comprises the following specific steps:
(1) mixing the dried nylon 6 slices with a crystallization speed regulator, putting the mixture into a feeder, feeding the mixture into a double-screw extruder for melt extrusion and granulation to obtain nylon 6 master batches, wherein the mass ratio of the crystallization speed regulator to the nylon 6 slices in the nylon 6 master batches is (20: 180) - (20: 80);
(2) blending the nylon 6 master batches and the nylon 6 slices in the step (1) for melt spinning, extruding a melt from a spinneret orifice, then feeding the melt into a spinning channel, cooling the melt in the spinning channel by a side blowing device, and guiding tows to an upper oil wheel by a yarn guide rod for uniform tiling; and then the tows sequentially reach a cold roller group, a hot roller group and a tension roller after passing through a guide wire hook, the filaments stretched by the tension roller are formed by winding to obtain nylon 6 master filaments, and the high-single-fiber nylon 6 fibers are obtained after fiber separation, wherein the nylon 6 master filaments account for 10-30% of the total mass of the nylon 6 master filaments and the nylon 6 slices.
The crystallization speed regulator in the step (1) is inorganic powder with the surface subjected to organic treatment. And (3) carrying out surface treatment on the inorganic powder to enhance the compatibility of the crystallization speed regulator and the nylon 6 matrix.
The inorganic powder is montmorillonite, kaolin or talcum powder.
The surface is specifically subjected to organic treatment: dispersing inorganic powder in a mixed solution of ethanol and deionized water in a volume ratio of 60:40 at room temperature, performing ultrasonic treatment and stirring for 1-3h, then adding a treating agent, raising the reaction temperature to 60-80 ℃, performing ultrasonic treatment for 2-4h, performing suction filtration, washing, vacuum drying, grinding, and screening by using a 300-mesh sieve, wherein the mass ratio of the inorganic powder to the deionized water is (1: 100) - (2: 100), and the mass ratio of the treating agent to the inorganic powder is (1: 100) - (1: 10).
The treating agent is polyvinylpyrrolidone, long-chain organic quaternary ammonium salt or silane coupling agent.
The long-chain organic quaternary ammonium salt is tetradecyl dimethyl benzyl ammonium bromide; the silane coupling agent is vinyl triethoxysilane.
The technological parameters of the double-screw extruder in the step (1) are as follows: the temperature of the first zone is 245-250 ℃, the temperature of the second zone is 250-255 ℃, the temperature of the third zone is 250-255 ℃, the temperature of the fourth zone is 255-260 ℃, and the temperature of the machine head is 250-260 ℃.
The melt spinning process parameters in the step (2) are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 250-260 ℃, 255-270 ℃, 260-270 ℃, the temperature of a box body is 265-270 ℃, the side blowing air speed is 0.18-0.27 m/s, the air temperature is 20-25 ℃, the draft multiple of a cold roller set is 1.5-2.0, the setting temperature of a hot roller set is 140-180 ℃, the winding speed of winding forming is 3500-5000 m/min, the tension between the cold roller set and the hot roller set is 25-60 cN, and the tension between a tension roller and a winding forming part is 20-25 cN.
The single-fiber fineness of the high-single-fiber nylon 6 fibers in the step (2) is 20-100 deniers.
Classical crystallization nucleation theory suggests that a homogeneous system of one or more components tends to transform into one or more new more stable phases when one of the phases in the system is metastable due to changes in external conditions (e.g., temperature, pressure, etc.). As long as the driving force for the phase change is sufficiently large, the transition will start with a very large fluctuation in small areas. This small region is the nucleus of the new phase. The appearance of such a nucleus of very small size causes a decrease in the free energy of the system, which is not sufficient to compensate for the increase in the free energy of the surface, so that the nucleus will disappear after a short existence. New nuclei will constantly appear and disappear due to the effect of thermal fluctuations. Occasionally, due to a series of favorable thermal fluctuations, the size of a nucleus, which is larger than a certain critical value, is called a nucleus or nucleus of a new phase, and finally grows into a crystal, can be increased to exist stably and can continue to grow. Nucleation not only initiates the crystallization process, but also determines the crystal structure.
In the process of nylon 6 crystallization, a crystallization speed regulator is added, the crystallization speed regulator is used as a center, and nylon 6 molecular chain segments are adsorbed and orderly arranged to form a crystal nucleus. By controlling the content of the added crystallization speed regulating agent and the dispersibility of the crystallization speed regulating agent in the nylon 6 matrix, the crystallization speed of the nylon 6 can be controlled, the controllable solidification of the nylon 6 can be realized, and then the uniform solidification of the melt of the high single-fiber nylon 6 fiber in the spinning process can be realized.
Advantageous effects
(1) The invention has high spinning speed and high production efficiency;
(2) the invention has strong variety adaptability, can be produced in large scale in the conventional nylon 6 fiber production device, and has simple and convenient operation;
(3) the invention controls the crystallization rate of nylon 6 by controlling the content of the added crystallization speed regulating agent and the uniform dispersion of the crystallization speed regulating agent in the nylon 6 matrix, thereby realizing the uniform solidification of the melt in the forming process of the nylon 6 fiber, and ensuring that the prepared high single-fiber nylon 6 fiber has uniform structure and high fiber quality.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
(1) Preparation of crystallization rate regulator: dispersing 3g of talcum powder in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of polyvinylpyrrolidone, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 10:90, extruding a melt from a spinneret orifice, then feeding the melt into a spinning channel, cooling the melt in the spinning channel by a side blowing device, and guiding tows to an upper oil wheel by a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 1.6 of the draft multiple of a cold roll group, 140 ℃ of the setting temperature of a hot roll group and 4000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single-fiber fineness of the prepared nylon 6 fiber is 30 deniers, the breaking strength is 4.82cN/dtex, and the elongation at break is 62%.
Example 2
(1) Preparation of crystallization rate regulator: dispersing 3g of talcum powder in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of tetradecyl dimethyl benzyl ammonium bromide, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 15:85, extruding a melt from a spinneret orifice, then feeding the melt into a spinning channel, cooling the melt in the spinning channel by a side blowing device, and guiding tows to an upper oil wheel by a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 1.8 of the drafting multiple of a cold roll group, 160 ℃ of the shaping temperature of a hot roll group and 4500m/min of winding speed. The tension of the cold roll group and the hot roll group is 30cN, the tension between the tension roll and the winding forming part is 20cN, the single fiber fineness of the prepared nylon 6 fiber is 40 denier, the breaking strength is 5.25cN/dtex, and the breaking elongation is 53%.
Example 3
(1) Preparation of crystallization rate regulator: dispersing 3g of talcum powder in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of vinyl triethoxysilane, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 20:80, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil tanker through a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 1.8 of the draft multiple of a cold roll group, 160 ℃ of the setting temperature of a hot roll group and 5000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 50 deniers, the breaking strength is 5.66cN/dtex, and the elongation at break is 40%.
Example 4
(1) Preparation of crystallization rate regulator: dispersing 3g of kaolin in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating and stirring for 1h, adding 0.3g of polyvinylpyrrolidone, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 10:90, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil wheel by a yarn guide rod for uniform tiling; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 1.6 of the draft multiple of a cold roll group, 140 ℃ of the setting temperature of a hot roll group and 4000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single-fiber fineness of the prepared nylon 6 fiber is 30 deniers, the breaking strength is 4.86cN/dtex, and the elongation at break is 59%.
Example 5
(1) Preparation of crystallization rate regulator: dispersing 3g of kaolin in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating the mixture for 1h, adding 0.3g of tetradecyl dimethyl benzyl ammonium bromide, raising the reaction temperature to 60 ℃, ultrasonically treating the mixture for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding the mixture by using a mortar, and screening the ground mixture by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 15:85, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil wheel by a yarn guide rod for uniform tiling; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 1.8 of the drafting multiple of a cold roll group, 160 ℃ of the shaping temperature of a hot roll group and 4500m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 40 deniers, the breaking strength is 5.22cN/dtex, and the elongation at break is 50%.
Example 6
(1) Preparation of crystallization rate regulator: dispersing 3g of kaolin in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating and stirring for 1h, adding 0.3g of vinyl triethoxysilane, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 20:80, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil tanker through a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 2.0 of draft multiple of a cold roll group, 180 ℃ of setting temperature of a hot roll group and 5000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 50 deniers, the breaking strength is 5.71cN/dtex, and the elongation at break is 42%.
Example 7
(1) Preparation of crystallization rate regulator: dispersing 3g of montmorillonite in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of polyvinylpyrrolidone, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 10:90, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil wheel by a yarn guide rod for uniform tiling; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 1.6 of the draft multiple of a cold roll group, 140 ℃ of the setting temperature of a hot roll group and 4000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single-fiber fineness of the prepared nylon 6 fiber is 30 deniers, the breaking strength is 4.89cN/dtex, and the elongation at break is 58%.
Example 8
(1) Preparation of crystallization rate regulator: dispersing 3g of montmorillonite in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of tetradecyl dimethyl benzyl ammonium bromide, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 15:85, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil wheel by a yarn guide rod for uniform tiling; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 1.8 of the drafting multiple of a cold roll group, 160 ℃ of the shaping temperature of a hot roll group and 4500m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 40 deniers, the breaking strength is 5.27cN/dtex, and the elongation at break is 49%.
Example 9
(1) Preparation of crystallization rate regulator: dispersing 3g of montmorillonite in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of vinyltriethoxysilane, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to a mass ratio of 20:100, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 20:80, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil tanker through a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 2.0 of draft multiple of a cold roll group, 180 ℃ of setting temperature of a hot roll group and 5000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 50 deniers, the breaking strength is 5.77cN/dtex, and the elongation at break is 38%.
Example 10
(1) Preparation of crystallization rate regulator: dispersing 3g of montmorillonite in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of vinyltriethoxysilane, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator according to the mass ratio of 20:180, putting the uniformly mixed materials into a feeder, and putting the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 20:80, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil tanker through a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 2.0 of draft multiple of a cold roll group, 180 ℃ of setting temperature of a hot roll group and 5000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 50 deniers, the breaking strength is 5.33cN/dtex, and the elongation at break is 42%.
Example 11
(1) Preparation of crystallization rate regulator: dispersing 3g of montmorillonite in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of vinyltriethoxysilane, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator in a mass ratio of 30:170, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 20:80, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil tanker through a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 2.0 of draft multiple of a cold roll group, 180 ℃ of setting temperature of a hot roll group and 5000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 50 deniers, the breaking strength is 5.65cN/dtex, and the elongation at break is 40%.
Example 12
(1) Preparation of crystallization rate regulator: dispersing 3g of montmorillonite in 300ml of ethanol/deionized water mixed solution (60/40 volume ratio) in a 500ml beaker at room temperature, ultrasonically treating for 1h, adding 0.3g of vinyltriethoxysilane, raising the reaction temperature to 60 ℃, ultrasonically treating for 4h under the condition of high-speed mechanical stirring, then carrying out suction filtration and washing, carrying out vacuum drying at 80 ℃, grinding by using a mortar, and screening by using a 300-mesh sieve.
(2) Preparing nylon 6 master batch: mixing the dried nylon 6 slices with a crystallization speed regulator in a mass ratio of 20:80, putting the uniformly mixed materials into a feeder, and feeding the materials into a double-screw extruder for melt extrusion and granulation. The first zone temperature of the double-screw extruder is 245 ℃, the second zone temperature is 250 ℃, the third zone temperature is 250 ℃, the fourth zone temperature is 255 ℃, and the head temperature is 255 ℃.
(3) Preparation of high single-fiber nylon 6 fiber: melting and blending the dried nylon 6 master batch and the dried nylon 6 slices by a double-screw extruder according to the mass ratio of 20:80, extruding a melt from a spinneret orifice, feeding the melt into a spinning channel, and guiding tows to an upper oil tanker through a yarn guide rod to be uniformly spread; and then the filament bundle passes through a filament guide hook and sequentially reaches a cold roll group, a hot roll group and a tension roll, the filament stretched by the tension roll is formed by winding to obtain a nylon 6 master filament, and the high-single-fiber nylon 6 fiber is obtained after fiber separation. The main technological parameters are as follows: the double-screw extruder is provided with 5 heating zones (five barrels), each heating zone is wrapped by an upper aluminum tile and a lower aluminum tile, the temperature is controlled by adjusting the electrifying time of a heater in each section of aluminum tile, the temperature of each zone is 252 ℃, 265 ℃, 267 ℃, 268 ℃, 268 ℃, 265 ℃ of a box body, 0.2m/s of side blowing air speed, 20 ℃ of air temperature, 2.0 of draft multiple of a cold roll group, 180 ℃ of setting temperature of a hot roll group and 5000m/min of winding speed. The tension of the cold roll group and the hot roll group was 30cN, and the tension between the tension roll and the winding member was 20 cN. The single fiber fineness of the prepared nylon 6 fiber is 50 deniers, the breaking strength is 5.87cN/dtex, and the elongation at break is 36%.
Claims (4)
1. A preparation method of high single-fiber nylon 6 fiber based on high-speed spinning comprises the following specific steps:
(1) mixing the dried nylon 6 slices with a crystallization speed regulator, putting the mixture into a feeder, feeding the mixture into a double-screw extruder for melt extrusion and granulation to obtain nylon 6 master batches, wherein the mass ratio of the crystallization speed regulator to the nylon 6 slices in the nylon 6 master batches is (20: 180) - (20: 80), the crystallization speed regulator is inorganic powder with the surface subjected to organic treatment, the inorganic powder is montmorillonite, kaolin or talcum powder, and the surface is specifically subjected to organic treatment: dispersing inorganic powder in a mixed solution of ethanol and deionized water in a volume ratio of 60:40 at room temperature, performing ultrasonic treatment and stirring for 1-3 hours, then adding a treating agent, raising the reaction temperature to 60-80 ℃, performing ultrasonic treatment for 2-4 hours, performing suction filtration, washing, vacuum drying, grinding, and screening by using a 300-mesh sieve, wherein the mass ratio of the inorganic powder to the deionized water is (1: 100) - (2: 100); the mass ratio of the treating agent to the inorganic powder is (1: 100) - (1: 10), and the treating agent is polyvinylpyrrolidone, long-chain organic quaternary ammonium salt or silane coupling agent;
(2) blending the nylon 6 master batches and the nylon 6 slices in the step (1) for melt spinning, extruding a melt from a spinneret orifice, then feeding the melt into a spinning channel, cooling the melt in the spinning channel by a side blowing device, and guiding tows to an upper oil wheel by a yarn guide rod for uniform tiling; and then the tows sequentially reach a cold roller group, a hot roller group and a tension roller after passing through a guide wire hook, the filaments stretched by the tension roller are formed by winding to obtain nylon 6 master filaments, and the high-single-fiber nylon 6 fibers are obtained after fiber separation, wherein the nylon 6 master filaments account for 10-30% of the total mass of the nylon 6 master filaments and the nylon 6 slices.
2. The method for preparing high monofilament nylon 6 fiber based on high speed spinning according to claim 1, characterized in that the long chain organic quaternary ammonium salt in step (1) is tetradecyl dimethyl benzyl ammonium bromide; the silane coupling agent is vinyl triethoxysilane.
3. The preparation method of high single-fiber nylon 6 fiber based on high-speed spinning according to claim 1, characterized in that the process parameters of the twin-screw extruder in step (1) are as follows: the temperature of the first zone is 245-250 ℃, the temperature of the second zone is 250-255 ℃, the temperature of the third zone is 250-255 ℃, the temperature of the fourth zone is 255-260 ℃, and the temperature of the machine head is 250-260 ℃.
4. The preparation method of high single-fiber nylon 6 fiber based on high-speed spinning according to claim 1, characterized in that the melt spinning process parameters in step (2) are as follows: the double-screw extruder is provided with 5 heating zones, the temperature of each zone is 250-260 ℃, 255-270 ℃, 260-270 ℃, the temperature of a box body is 265-270 ℃, the side blowing air speed is 0.18-0.27 m/s, the air temperature is 20-25 ℃, the draft multiple of a cold roller set is 1.5-2.0, the setting temperature of a hot roller set is 140-180 ℃, the winding speed is 3500-5000 m/min, the tension between the cold roller set and the hot roller set is 25-60 cN, and the tension between a tension roller and a winding forming part is 20-25 cN.
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| CN110387597B (en) * | 2019-06-19 | 2021-10-26 | 东华大学 | High-strength nylon 6 filament based on one-step drafting process and preparation method thereof |
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