CN108611692A - A kind of preparation method of the high single fiber nylon 6 fiber based on high-speed spinning - Google Patents

Abstract

The invention relates to a preparation method of high-single-fiber nylon 6 fiber based on high-speed spinning, comprising: mixing dried nylon 6 slices with a crystallization speed regulator, putting them into a feeder, and feeding the materials into a twin-screw extruder for melting Extrude and granulate to obtain nylon 6 masterbatch; blend nylon 6 masterbatch and nylon 6 slices for melt spinning, the melt is extruded from the spinneret hole and enters the spinning tunnel, and passes through the side blowing device in the spinning tunnel Cooling, oiling, drawing, winding and forming, after fiber separation. The present invention regulates the crystallization rate of nylon 6 by controlling the content of the added crystallization rate regulating agent and its uniform dispersion in the nylon 6 matrix, so as to realize the uniform solidification of the melt during the molding process of nylon 6 fibers, so that the prepared high-single fiber The nylon 6 fiber structure is uniform and the fiber quality is high.

Description

A kind of preparation method of high single fiber nylon 6 fiber based on high-speed spinning

technical field

The invention belongs to the field of chemical fiber preparation, in particular to a preparation method of high-single-fiber nylon 6 fiber based on high-speed spinning.

Background technique

Nylon 6 fiber is a kind of textile raw material, which has various types such as monofilament, strand and special yarn. In daily life, it is mainly used to make sportswear, scarves, etc.; in medical treatment, it is mainly used to make bandages; Nylon 6 fiber products are more used to produce decorative fabrics. Nylon 6 fiber has excellent physical properties, such as its high strength, good wear resistance, and high moisture regain, and is widely used in clothing (such as knitted underwear, hosiery, sportswear, ski jackets, tights, etc.), industry, automobiles, Aerospace and other fields. In recent years, nylon 6 fiber has also been continuously developed and updated, among which the development of coarse denier nylon 6 fiber has become an important trend. Due to its high strength, low elongation at break and rough fiber style, ultra-coarse denier fibers can be widely used in bags, lace, decorative fabrics, tents, sofa fabrics, carpets, filter cloths, high-strength sewing threads and other fields.

At present, there is a very important problem in the production process of coarse denier nylon 6 fiber, which is the inhomogeneity of melt cooling. Because the cooling speed is too fast, the uniformity of cooling will be greatly affected by side blowing, which will easily cause problems of different crystallinity and orientation between the inside and outside of the monofilament, the windward side and the leeward side, forming a skin-core structure. And the bad condition of the irregular cross-section of the finished monofilament is not conducive to the post-processing of the fiber, and affects the performance and quality of the product.

The patent application with the application number CN104818538A discloses a production method of ultra-coarse denier nylon 6 flat yarn and nylon 6 ultra-coarse denier flat yarn. In the patent, the inner ring blowing device is used, the cooling length of the windshield is changed, and the cluster oiling point is used to achieve Solve the problem of uneven cooling of coarse denier fibers.

The patent application with application number CN201110239259.8 discloses a blowing cooling method and device for spinning coarse denier fibers. In the patent, the cooling process is divided into 3 to 7 sections, and the side blowing temperature of each section is sequentially reduced by 3 to 10°C , to realize the mild cooling of the tow, so that the molecular chains in the high elastic state have sufficient time to arrange, avoid the crystallization of the inner and outer layers of the coarse denier fiber and the phenomenon of inconsistent orientation, overcome the problem of easy skin-core structure, and improve post-processing efficiency and product quality. These invention patents can solve the cooling problem of coarse denier fibers to a certain extent, but the production process is relatively complicated and the variety adaptability is poor.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for preparing high-single-fiber nylon 6 fibers based on high-speed spinning, which can speed up the internal cooling of filaments by adding a crystallization speed regulator based on inorganic powder surface organic treatment The crystallization speed realizes the uniformity of crystallization inside and outside the filament, which is conducive to improving the quality of high-single-fiber nylon 6 fiber, and solves the problem of uniform cooling of high-single-fiber nylon 6 fiber under the premise of high-speed spinning.

A kind of preparation method of high-single fiber nylon 6 fiber based on high-speed spinning of the present invention, concrete steps are:

(1) Mix the dried nylon 6 slices with the crystallization speed regulator, put them into the feeder, and the material enters the twin-screw extruder for melt extrusion and granulation to obtain the nylon 6 masterbatch, wherein the nylon 6 masterbatch is The mass ratio of crystallization speed regulator to nylon 6 chips is (20:180)-(20:80);

(2) Nylon 6 masterbatch and nylon 6 chips are blended and melt spun in step (1), the melt enters the spinning tunnel after being extruded from the spinneret hole, and is cooled by a side blowing device in the spinning tunnel, The guide wire guides the tow to the oil tanker for even laying; then the tow passes through the guide hook and then reaches the cold roller group, the hot roller group and the tension roller in turn, and the filament stretched by the tension roller is wound and formed to obtain nylon 6 The mother silk is divided into high single-fiber nylon 6 fibers, wherein the nylon 6 masterbatch accounts for 10-30% of the total mass of the nylon 6 masterbatch and nylon 6 chips.

The crystallization rate regulator in the step (1) is an inorganic powder whose surface has undergone organic treatment. Surface treatment is carried out on the inorganic powder to enhance the compatibility between the crystallization rate regulator and the nylon 6 matrix.

The inorganic powder is montmorillonite, kaolin or talc.

The organic treatment of the surface is as follows: disperse the inorganic powder in the mixed solution of ethanol and deionized water with a volume ratio of 60:40 at room temperature, ultrasonically stir for 1-3 hours, then add the treatment agent, and the reaction temperature rises to 60-80°C, stirred and ultrasonically treated for 2-4 hours, filtered, washed, vacuum-dried, crushed and ground, and screened with a 300-mesh sieve, wherein the mass ratio of inorganic powder to deionized water is (1:100)- (2:100), the mass ratio of treatment agent to inorganic powder is (1:100)-(1:10).

The treatment 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 triethoxy silane.

The process parameters of the twin-screw extruder in the step (1) are: the temperature in the first zone is 245-250°C, the temperature in the second zone is 250-255°C, the temperature in the third zone is 250-255°C, and the temperature in the fourth zone is 255-255°C. 260°C, the head temperature is 250-260°C.

The process parameters of melt spinning in the step (2) are: the twin-screw extruder has 5 heating zones (five sections of barrel), and each heating zone has upper and lower two aluminum tiles to wrap, by adjusting The temperature is controlled by the energization time of the heater in each section of the aluminum tile. The temperature of each zone is 250-260°C, 255-270°C, 255-270°C, 260-270°C, 260-270°C, and the temperature of the box is 265-270°C. ℃, the wind speed of side blowing is 0.18-0.27m/s, the wind temperature is 20-25 ℃, the draft ratio of the cold roll group is between 1.5-2.0, the setting temperature of the hot roll group is 140-180 ℃, and the winding forming winding The speed is 3500-5000m/min, the tension between the cold roller group and the hot roller group is 25-60cN, and the tension between the tension roller and the winding forming part is 20-25cN.

The single fiber fineness of the high single fiber nylon 6 fiber in the step (2) is 20-100 denier.

The classical crystallization nucleation theory holds that for a homogeneous system composed of one or more components, when a change in external conditions (such as temperature, pressure, etc.) makes a certain phase in the system in a metastable state, a tendency toward The tendency to transform into one or more stable new phases. As long as the driving force for the phase transition is large enough, the transition will start with very large fluctuations in a small area. This small area is the nucleus of the new phase. The decrease in system free energy caused by the emergence of such a small-sized embryonic nucleus is not enough to compensate for the increase in surface free energy, so the embryonic nucleus will disappear after a short period of existence. Due to thermal fluctuations, new germ nuclei will constantly appear and disappear. Occasionally, due to a series of favorable thermal fluctuations, the size of a certain nucleus can be increased to stabilize and continue to grow. The nucleus with a size larger than a certain critical value is called the core or crystal nucleus of the new phase, and Finally, it grows to become a crystal. Nucleation not only initiates the crystallization process but also determines the crystal structure.

During the crystallization process of nylon 6, by adding a crystallization speed regulator, centering on the crystallization speed regulator, the molecular segments of nylon 6 are adsorbed and arranged in an orderly manner to form crystal nuclei. By controlling the content of the added crystallization rate regulator and its dispersibility in the nylon 6 matrix, the crystallization rate of nylon 6 can be controlled, and the controllable solidification of nylon 6 can be realized, and then the high single fiber nylon 6 fiber can be realized in the spinning process. Uniform solidification of the melt.

Beneficial effect

(1) The spinning speed of the present invention is high, and the production efficiency is high;

(2) The variety of the present invention has strong adaptability, can be produced on a large scale in a conventional nylon 6 fiber production device, and is easy to operate;

(3) The present invention regulates the crystallization rate of nylon 6 by controlling the content of the added crystallization rate regulator and its uniform dispersion in the nylon 6 matrix, thereby realizing the uniform solidification of the melt in the nylon 6 fiber molding process, so that the prepared High monofilament nylon 6 has uniform fiber structure and high fiber quality.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of talc powder in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g poly For vinylpyrrolidone, the reaction temperature was raised to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and screened with a 300-mesh sieve.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 chips are melted and blended through a twin-screw extruder at a mass ratio of 10:90, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, where it is cooled by a side blowing device in the spinning tunnel, and the tow is led to the upper oil tanker through the guide wire rod to be evenly spread; then the tow passes through the guide wire hook and then arrives at the cooling roller group, Heat roller group and tension roller, the filament stretched by the tension roller is wound and formed to obtain nylon 6 mother filament, and high single-fiber nylon 6 fiber is obtained after fiber separation. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 1.6, the setting temperature of the hot roller group is 140°C, and the winding speed is 4000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 30 denier, the breaking strength is 4.82cN/dtex, and the breaking elongation is 62%.

Example 2

(1) Preparation of crystallization speed regulator: at room temperature, in a 500ml beaker, disperse 3g of talc powder in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g of deionized water Tetraalkyl dimethyl benzyl ammonium bromide, the reaction temperature rises to 60 °C, ultrasonic treatment for 4 hours under the condition of high-speed mechanical stirring, then suction filtration, washing, vacuum drying at 80 °C, grinding with a mortar after crushing, and 300 mesh sieve for screening.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 chips are melted and blended through a twin-screw extruder at a mass ratio of 15:85, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, where it is cooled by a side blowing device in the spinning tunnel, and the tow is led to the upper oil tanker through the guide wire rod to be evenly spread; then the tow passes through the guide wire hook and then arrives at the cooling roller group, Heat roller group and tension roller, the filament stretched by the tension roller is wound and formed to obtain nylon 6 mother filament, and high single-fiber nylon 6 fiber is obtained after fiber separation. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 1.8, the setting temperature of the hot roller group is 160°C, and the winding speed is 4500m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the produced nylon 6 fiber is 40 denier, and the breaking strength is 5.25cN/dtex. The elongation was 53%.

Example 3

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of talc powder in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g of ethylene Triethoxysilane, the reaction temperature increased to 60 ° C, under the condition of high-speed mechanical stirring, ultrasonic treatment for 4 hours, then suction filtration, washing, vacuum drying at 80 ° C, crushed and ground with a mortar, and sieved with a 300-mesh sieve .

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 slices are melted and blended through a twin-screw extruder at a mass ratio of 20:80, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 1.8, the setting temperature of the hot roller group is 160°C, and the winding speed is 5000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 50 denier, the breaking strength is 5.66 cN/dtex, and the breaking elongation is 40%.

Example 4

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of kaolin in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g of polyethylene For pyrrolidone, the reaction temperature was increased to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and screened with a 300-mesh sieve.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 chips are melted and blended through a twin-screw extruder at a mass ratio of 10:90, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 1.6, the setting temperature of the hot roller group is 140°C, and the winding speed is 4000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 30 denier, the breaking strength is 4.86 cN/dtex, and the breaking elongation is 59%.

Example 5

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g kaolin in 300ml ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g fourteen Alkyl dimethyl benzyl ammonium bromide, the reaction temperature rises to 60°C, ultrasonic treatment for 4h under the condition of high-speed mechanical stirring, then suction filtration, washing, vacuum drying at 80°C, crushing and grinding with a mortar, and use 300 sieve for screening.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 chips are melted and blended through a twin-screw extruder at a mass ratio of 15:85, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 1.8, the setting temperature of the hot roller group is 160°C, and the winding speed is 4500m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 40 denier, the breaking strength is 5.22cN/dtex, and the breaking elongation is 50%.

Example 6

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of kaolin in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g of vinyl Triethoxysilane, the reaction temperature was increased to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and screened with a 300-mesh sieve.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 slices are melted and blended through a twin-screw extruder at a mass ratio of 20:80, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 2.0, the setting temperature of the hot roller group is 180°C, and the winding speed is 5000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 50 denier, the breaking strength is 5.71cN/dtex, and the breaking elongation is 42%.

Example 7

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of montmorillonite in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g For polyvinylpyrrolidone, the reaction temperature was raised to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and screened with a 300-mesh sieve.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 chips are melted and blended through a twin-screw extruder at a mass ratio of 10:90, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 1.6, the setting temperature of the hot roller group is 140°C, and the winding speed is 4000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 30 denier, the breaking strength is 4.89 cN/dtex, and the breaking elongation is 58%.

Example 8

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of montmorillonite in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g Tetradecyl dimethyl benzyl ammonium bromide, the reaction temperature rises to 60 °C, ultrasonic treatment for 4 hours under the condition of high-speed mechanical stirring, then suction filtration, washing, vacuum drying at 80 °C, grinding with a mortar after crushing, and sifted through a 300-mesh sieve.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 chips are melted and blended through a twin-screw extruder at a mass ratio of 15:85, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 1.8, the setting temperature of the hot roller group is 160°C, and the winding speed is 4500m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 40 denier, the breaking strength is 5.27cN/dtex, and the breaking elongation is 49%.

Example 9

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of montmorillonite in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g Vinyltriethoxysilane, the reaction temperature is raised to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and sieved with a 300-mesh sieve filter.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:100, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 slices are melted and blended through a twin-screw extruder at a mass ratio of 20:80, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 2.0, the setting temperature of the hot roller group is 180°C, and the winding speed is 5000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 50 denier, the breaking strength is 5.77cN/dtex, and the breaking elongation is 38%.

Example 10

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of montmorillonite in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g Vinyltriethoxysilane, the reaction temperature is raised to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and sieved with a 300-mesh sieve filter.

(2) Preparation of Nylon 6 Masterbatch: Mix the dried Nylon 6 slices with the crystallization rate regulator at a mass ratio of 20:180, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 slices are melted and blended through a twin-screw extruder at a mass ratio of 20:80, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 2.0, the setting temperature of the hot roller group is 180°C, and the winding speed is 5000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 50 denier, the breaking strength is 5.33 cN/dtex, and the breaking elongation is 42%.

Example 11

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of montmorillonite in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g Vinyltriethoxysilane, the reaction temperature is raised to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and sieved with a 300-mesh sieve filter.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization rate regulator at a mass ratio of 30:170, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 slices are melted and blended through a twin-screw extruder at a mass ratio of 20:80, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 2.0, the setting temperature of the hot roller group is 180°C, and the winding speed is 5000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 50 denier, the breaking strength is 5.65 cN/dtex, and the breaking elongation is 40%.

Example 12

(1) Preparation of crystallization rate regulator: at room temperature, in a 500ml beaker, disperse 3g of montmorillonite in 300ml of ethanol/deionized water mixture (60/40 volume ratio), ultrasonically stir for 1h, add 0.3g Vinyltriethoxysilane, the reaction temperature is raised to 60°C, ultrasonically treated for 4 hours under the condition of high-speed mechanical stirring, then suction filtered, washed, vacuum-dried at 80°C, crushed and ground with a mortar, and sieved with a 300-mesh sieve filter.

(2) Preparation of nylon 6 masterbatch: mix the dried nylon 6 slices with the crystallization speed regulator at a mass ratio of 20:80, put the uniformly mixed material into the feeder, and the material enters the twin-screw extruder for further processing. Melt extrusion, granulation. The temperature of the first zone of the twin-screw extruder is 245°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 255°C, and the temperature of the head is 255°C.

(3) Preparation of high-single-fiber nylon 6 fibers: the above-mentioned dried nylon 6 masterbatch and dried nylon 6 slices are melted and blended through a twin-screw extruder at a mass ratio of 20:80, and the melt is melted from the spinneret After the hole is extruded, it enters the spinning tunnel, and the tow is led to the upper oil tanker by the guide wire rod for even flattening; then the tow passes through the guide wire hook and then reaches the cold roller group, hot roller group and tension roller in sequence, and is stretched by the tension roller The final filaments are wound and formed to obtain nylon 6 mother filaments, and high single-fiber nylon 6 fibers are obtained after fiber splitting. The main process parameters are: the twin-screw extruder has a total of 5 heating zones (five-section barrel), and each heating zone is covered by two upper and lower aluminum tiles. By adjusting the power-on time of the heater in each section of the aluminum tile To control the temperature, the temperature in each zone is 252°C, 265°C, 267°C, 268°C, 268°C, the box temperature is 265°C, the side blowing wind speed is 0.2m/s, the wind temperature is 20°C, and the drafting ratio of the chilled roll group is is 2.0, the setting temperature of the hot roller group is 180°C, and the winding speed is 5000m/min. The tension between the cold roller group and the hot roller group is 30cN, and the tension between the tension roller and the winding forming part is 20cN. The single fiber fineness of the prepared nylon 6 fiber is 50 denier, the breaking strength is 5.87cN/dtex, and the breaking elongation is 36%.

Claims (9)

1. a kind of preparation method based on the high single fiber nylon 6 fiber of high-speed spinning, concrete steps are: (1) Mix the dried nylon 6 slices with the crystallization speed regulator, put them into the feeder, and the material enters the twin-screw extruder for melt extrusion and granulation to obtain the nylon 6 masterbatch, wherein the nylon 6 masterbatch is The mass ratio of crystallization speed regulator to nylon 6 chips is (20:180)-(20:80); (2) Nylon 6 masterbatch and nylon 6 chips are blended and melt spun in step (1), the melt enters the spinning tunnel after being extruded from the spinneret hole, and is cooled by a side blowing device in the spinning tunnel, The guide wire guides the tow to the oil tanker for even laying; then the tow passes through the guide hook and then reaches the cold roller group, the hot roller group and the tension roller in turn, and the filament stretched by the tension roller is wound and formed to obtain nylon 6 The mother silk is divided into high single-fiber nylon 6 fibers, wherein the nylon 6 masterbatch accounts for 10-30% of the total mass of the nylon 6 masterbatch and nylon 6 chips. 2. according to the preparation method of a kind of high-single-filament nylon 6 fiber based on high-speed spinning according to claim 1, it is characterized in that, in the described step (1), the crystallization speed regulator is the inorganic powder through organic treatment on the surface . 3. according to the preparation method of a kind of high-single fiber nylon 6 fiber based on high speed spinning according to claim 2, it is characterized in that, described inorganic powder is montmorillonite, kaolin or talcum powder. 4. according to the preparation method of a kind of high-single-filament nylon 6 fiber based on high-speed spinning according to claim 2, it is characterized in that, the described surface is specifically as follows: inorganic powder is dispersed in volume ratio at room temperature In a 60:40 mixture of ethanol and deionized water, ultrasonically and stir for 1-3h, then add a treatment agent, the reaction temperature rises to 60-80°C, stir and ultrasonically treat for 2-4h, suction filter, wash, and vacuum dry , crushed and ground, and sieved with a 300-mesh sieve. 5. according to the preparation method of a kind of high-single fiber nylon 6 fiber based on high-speed spinning according to claim 4, it is characterized in that, the mass ratio of described inorganic powder and deionized water is (1:100)-(2 :100); the mass ratio of treatment agent to inorganic powder is (1:100)-(1:10). 6. according to the preparation method of a kind of high single fiber nylon 6 fiber based on high-speed spinning according to claim 4, it is characterized in that, described treatment agent is polyvinylpyrrolidone, long-chain organic quaternary ammonium salt or silane coupling agent. 7. according to the preparation method of a kind of high single fiber nylon 6 fiber based on high-speed spinning according to claim 6, it is characterized in that, described long-chain organic quaternary ammonium salt is tetradecyl dimethyl benzyl ammonium bromide ; The silane coupling agent is vinyltriethoxysilane. 8. according to the preparation method of a kind of high-single fiber nylon 6 fiber based on high-speed spinning according to claim 1, it is characterized in that, the process parameter of twin-screw extruder in the described step (1) is: a district temperature 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℃. 9. according to the preparation method of a kind of high-single fiber nylon 6 fiber based on high-speed spinning according to claim 1, it is characterized in that, the process parameter of melt spinning in the described step (2) is: twin-screw extruder shares 5 heating zones, the temperature of each zone is 250-260°C, 255-270°C, 255-270°C, 260-270°C, 260-270°C, the temperature of the box is 265-270°C, and the side blowing wind speed is 0.18-0.27 m/s, air temperature is 20-25°C, draft ratio of chilled rolls is 1.5-2.0, setting temperature of hot rolls is 140-180°C, winding speed is 3500-5000m/min, cold rolls and hot rolls The tension between the groups is 25-60cN, and the tension between the tension roller and the winding forming part is 20-25cN.