CN115627549A - Preparation method of high-strength low-boiling-water-shrinkage polyamide-6 filament - Google Patents
Preparation method of high-strength low-boiling-water-shrinkage polyamide-6 filament Download PDFInfo
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- 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
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—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
Abstract
The invention relates to the technical field of textile chemical fiber preparation, and discloses a preparation method of high-strength low-boiling-water-shrinkage polyamide-6 filament, which comprises the following steps: preparing modified nylon-6 master batch by sequentially carrying out quantitative feeding, melting plasticization, screw shearing, water-cooling granulation, vibration screening and vacuum drying on nylon-6 slices, nano montmorillonite powder and dispersant powder; adding the nylon-6 slices and the modified nylon-6 master batch into a screw extruder to prepare a molten material, sequentially processing the molten material by a static mixer and a spinning machine, and ejecting a melt trickle from a discharge end by the spinning machine; and cooling and solidifying the melt stream into tows through a side blowing air chamber, sequentially passing the tows through a first oil feeder, a yarn guide hook, a second oil feeder, a pre-interlacer, a first pair of drawing roller sets, a second pair of drawing roller sets, a third pair of drawing roller sets, a fourth pair of drawing roller sets, a fifth pair of drawing roller sets and a main interlacer, and then rolling the tows in a rolling machine, wherein the rolled tows are the nylon 6 filaments with high strength and low boiling water shrinkage.
Description
Technical Field
The invention relates to a preparation method of high-strength low-boiling-water-shrinkage chinlon 6 filament, belonging to the technical field of textile chemical fiber preparation.
Background
The multi-stage drafting has a remarkable effect on improving the strength of the nylon 6, but as the drafting multiple is increased, the larger the stretching tension is, the larger the generated stretching stress is, and the larger the boiling water shrinkage rate of the prepared nylon 6 is. Yarns with large boiling water shrinkage have the following problems during downstream application: (1) Shrinkage is serious in the dyeing process, and the phenomenon of color bloom is easily caused; (2) In the unwinding process of the cone yarn, the tension difference is large easily caused by shrinkage, the unwinding is difficult, yarn breakage is easily caused, and the weaving difficulty is increased; (3) The fabric woven by the yarn with large boiling water shrinkage has poor shape retention and hard hand feeling. Therefore, the production of nylon 6 filaments with both high strength and low boiling water shrinkage remains a challenge.
At present, the invention patent with the grant publication number of CN102251324B in China discloses a production process of high-strength low-boiling-shrinkage nylon 6 special-shaped space-variant yarns, wherein the boiling water shrinkage of the nylon 6 can be reduced to 3% through a hot-roll heat setting and texturing process, the strength reaches 7.11cN/dtex, but the produced nylon 6 has the conditions of more broken filaments and high end breakage rate, and is not suitable for actual production.
The invention patent application with the publication number of CN112410899A discloses a manufacturing process of polyamide 6 with a high-strength structure, which is capable of spinning the polyamide 6 high-strength fiber with high strength and good dimensional stability by setting the innovative design of four-path drafting and spinning process parameters of tows and matching with high-temperature setting. According to the heat setting mechanism, the shrinkage of the prepared boiling water is reduced along with the increase of the setting temperature. However, in the actual production process, it is found that under the stretching condition, with the increase of the stretching temperature, the chinlon 6 is easy to generate local lattice fine slip or melting of crystal regions, the degree of order is reduced, and the breaking strength of the chinlon 6 is reduced, so that the process in the patent application CN112410899a is also difficult to realize high strength and low boiling water shrinkage.
In view of the current situation, a method for preparing nylon 6 filament with high strength and low boiling water shrinkage is provided to solve the problem that the fiber strength of nylon 6 is reduced in a high-temperature sizing process under the condition of multi-stage drafting.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a preparation method of nylon 6 filament with high strength and low boiling water shrinkage.
The technical scheme of the invention is as follows:
first aspect, a preparation facilities of low boiling water shrinkage factor polyamide fibre 6 filament of high strength, including raw materials holding vessel, proportioning machine, screw extruder, static mixer and spinning machine, the discharge end of raw materials holding vessel and proportioning machine all connects on screw extruder's feed end, and screw extruder's discharge end passes through the mode of pipe connection and links together with static mixer's feed end, and static mixer's discharge end links together through the feed end that sets up the mode of pipe connection and spinning machine, outwards having drawn forth nascent fibre on the discharge end of spinning machine, the nascent fibre of drawing forth passes first oiling ware, guide wire hook, second oiling ware, penetrates to the tensile subassembly behind the pre-network ware in proper order, and the tensile subassembly is used for carrying out high-power drawing to the nascent fibre that penetrates.
Wherein, stretching assembly includes first pair of drawing roller set, second pair of drawing roller set, third pair of drawing roller set, fourth pair of drawing roller set, fifth pair of drawing roller set and main network ware, penetrates to the rolling machine in after the nascent fibre that wears out from the network ware passes first pair of drawing roller set, second pair of drawing roller set, third pair of drawing roller set, fourth pair of drawing roller set, fifth pair of drawing roller set and main network ware in proper order.
And a side air blowing chamber is arranged at one side of the primary fiber leading-out section between the spinning machine and the first oiling device.
In a second aspect, the invention provides a preparation method of nylon 6 filament with high strength and low boiling water shrinkage, which is characterized by comprising the following steps of using the preparation device of the nylon 6 filament with high strength and low boiling water shrinkage:
the preparation method comprises the following steps of sequentially carrying out quantitative feeding, melting plasticization, screw shearing, water-cooling granulation, vibration screening and vacuum drying on nylon 6 slices, nano montmorillonite powder and dispersant powder, and before the nylon 6 slices, the nano montmorillonite powder and the dispersant powder enter the screw shearing step through melting plasticization, adding a filter screen with 400-800 meshes at the head of a screw shearing host machine to control the integral melting temperature of the head to 1.3-1.5 MPa, thus preparing the modified nylon 6 master batch with the relative viscosity of 2.4-2.5 and the water content of less than or equal to 500 ppm;
respectively adding the chinlon 6 slices and the modified chinlon 6 master batches into a screw extruder from a raw material storage tank and a batching machine according to a certain proportion for high-temperature melting and mixing to form a molten material;
the screw extruder conveys the molten materials into a static mixer through a connecting pipeline for further mixing, the uniformly mixed molten materials are conveyed into a spinning machine through the connecting pipeline, and after the spinning machine performs spinning work on the molten materials, a melt trickle is sprayed out from a discharge end;
the melt trickle is cooled and solidified into tows through a side blowing chamber, the tows are nascent fibers, the nascent fibers enter a first oiling device for preliminary oiling, then a guide wire hook is introduced, the nascent fibers enter a second oiling device for further oiling, and then the nascent fibers enter a pre-networking device for uniform oil distribution;
and (3) the oiled nascent fibers sequentially enter a first pair of drawing roller sets, a second pair of drawing roller sets, a third pair of drawing roller sets, a fourth pair of drawing roller sets and a fifth pair of drawing roller sets to be subjected to multistage drawing and heat setting, and finally enter a winding machine through a main network device to be wound, and the filament bundles wound in the winding machine are nylon 6 filaments with high strength and low boiling water shrinkage.
Wherein 57-94 parts of chinlon 6 slices, 5-40 parts of nano montmorillonite and 1-3 parts of dispersing agent powder.
Wherein, the polyamide-6 chip is selected from polyamide-6 chips with relative viscosity of 2.45-2.55 and water content of less than or equal to 500ppm, the ratio of the polyamide-6 chips to the modified polyamide-6 master batch is 99-80, and the dispersing agent powder is polyurethane, low relative molecular mass copolyamide and single type hyperdispersant powder
330, etc.
The method is characterized in that the melting plasticization of the nylon 6 slices, the nano montmorillonite powder and the dispersing agent powder is carried out in a double-screw extruder, the double-screw extruder is divided into eleven sections of temperature zones and a machine head temperature zone, the first section of temperature zone is 210-245 ℃, the second section of temperature zone is 215-245 ℃, the third section of temperature zone is 220-245 ℃, the fourth, fifth and sixth sections of temperature zones are 215-240 ℃, the seventh section of temperature zone is 200-215 ℃, the eighth section of temperature zone is 200-215 ℃, the ninth section of temperature zone is 195-205 ℃, the tenth section of temperature zone is 190-205 ℃, the eleventh section of temperature zone is 180-190 ℃ and the machine head temperature zone is 250-260 ℃.
Wherein the high-temperature melting temperature of the screw extruder is 240-270 ℃.
The side blowing temperature of the side blowing chamber is 20-24 ℃, the wind speed is 0.35-0.5 m/s, the first oiling device and the second oiling device both use JT-014 type oiling agents, the concentration of the oiling agents is 25-40%, and the oiling amount is kept between 1.0-1.6%.
Wherein the temperature of the first pair of drawing roller sets is 50-60 ℃, the temperature of the second pair of drawing roller sets is 160-170 ℃, the draft multiple is 3.0-4.0, the temperature of the third pair of drawing roller sets is 170-200 ℃, the draft multiple is 1.2-1.3, the temperature of the fourth pair of drawing roller sets is 175-220 ℃, the draft multiple is 1.
The invention has the following beneficial effects:
1. the carboxyl functional group grafted on the surface of the nano montmorillonite and the polyamide 6 molecule are subjected to chemical reaction to form a covalent bond, so that the compatibility of the nano montmorillonite and the polyamide 6 molecule can be improved, and meanwhile, by utilizing the lamellar structure of the nano montmorillonite, when a polyamide 6 molecular chain is subjected to tensile stress, the stress can be effectively transmitted to the nano montmorillonite lamellar, and the nano montmorillonite lamellar plays a role in bearing stress and improves the fiber strength. And the nano-montmorillonite with a certain content has an out-of-phase nucleation effect, can effectively improve the crystallization rate of the chinlon 6 molecule under a high-temperature condition, can promote the chinlon 6 molecule to directly enter a rapid growth stage of a lamella, improves the crystallization integrity and the crystallinity of the chinlon 6 molecule, and effectively reduces the phenomenon of local crystal lattice fine slippage of the chinlon 6 molecule in a high-temperature shaping process, thereby improving the fiber fracture strength.
2. According to the invention, the first pair of drawing roller sets, the second pair of drawing roller sets, the third pair of drawing roller sets, the fourth pair of drawing roller sets and the fifth pair of drawing roller sets are arranged, and the 5-pass roller sets are adopted for high-temperature shaping, so that the hot shaping device has the advantages of enhancing the hot shaping degree, improving the fiber size stability and reducing the boiling water shrinkage rate.
Drawings
FIG. 1 is a schematic structural diagram of a preparation device for high-strength low-boiling-water-shrinkage polyamide-6 filament yarns in the invention;
the reference numbers in the figures denote:
1. a raw material storage tank; 2. a dosing machine; 3. a screw extruder; 4. a static mixer; 5. a spinning machine; 6. nascent fiber; 7. a first oiling device; 8. a wire guide hook; 9. a second oiling device; 10. a pre-network device; 11. a first pair of draw roller sets; 12. a second pair of draw roller sets; 13. a third pair of draw roller sets; 14. a fourth pair of draw roller sets; 15. a fifth pair of draw roller sets; 16. a master network device; 17. a winding machine; 18. a side blowing chamber; .
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Example 1:
please refer to fig. 1, this embodiment provides a device for preparing nylon 6 filament with high strength and low boiling water shrinkage, which includes a raw material storage tank, a dispensing machine, a screw extruder, a static mixer and a spinning machine, wherein the raw material storage tank and the dispensing machine are provided with materials required for preparing the nylon 6 filament with high strength and low boiling water shrinkage, the screw extruder 3, the static mixer 4 and the spinning machine 5 are respectively used for an extrusion process, a mixing process and a spinning process, which are common machines in the prior art, and specifically, refer to the contents of the utility model with the granted publication number of chinese patent CN 210237858U.
Raw materials holding vessel, the batching, screw extruder, static mixer and spinning machine, when using, the discharge end of raw materials holding vessel and batching machine all connects in screw extruder's feed end, screw extruder's discharge end passes through the mode of pipe connection and links together with static mixer's feed end, static mixer's discharge end links together through the feed end that sets up pipe connection's mode and spinning machine, make in can getting into screw extruder from raw materials holding vessel and batching machine discharge end exhaust material, carry out high temperature melting in screw extruder and extrude the back and can get into static mixer and carry out further mixture, can get into spinning technology in the spinning machine after finishing mixing.
The spinning machine is characterized in that the discharging end of the spinning machine is externally led with a plurality of primary fibers obtained by a spinning process, the number of the led-out primary fibers can be determined according to the actual situation, the led-out primary fibers sequentially pass through a first oiling device, a yarn guide hook, a second oiling device and a pre-networking device and then penetrate into a stretching assembly, and the stretching assembly is used for performing high-power stretching on the penetrated primary fibers;
in this embodiment, the number of the first oiling device, the yarn guide hook and the second oiling device is determined according to the number of the actual primary fibers, and one primary fiber corresponds to one first oiling device, one yarn guide hook 8 and one second oiling device, the first oiling device and the second oiling device can oil the passing primary fibers, and the yarn guide hook is used for fixing the passing primary fibers; in the embodiment, the number of the pre-networking devices is 1, all the drawn primary fibers pass through the pre-networking devices, and the pre-networking devices can play roles in oil distribution and bundling on the passed primary fibers;
in this embodiment, the stretching assembly includes a first pair of stretching roller sets, a second pair of stretching roller sets, a third pair of stretching roller sets, a fourth pair of stretching roller sets, a fifth pair of stretching roller sets and a main network ware, wherein, two stretching rollers in the first pair of stretching roller sets are a hot roll and a cold roll respectively, and the diameter ratio of cold roll and hot roll is 1:1.5 to 3, the two drawing rolls of the second pair of drawing roll sets are also respectively a hot roll and a cold roll, and the diameter ratio of the cold roll to the hot roll is also 1: 1.5-3, wherein the two drawing rollers of the third pair of drawing roller sets, the fourth pair of drawing roller sets and the fifth pair of drawing roller sets are all hot rollers and have the same diameter; through the arrangement, the nylon 6 macromolecules can be configured with a higher draft ratio in the drafting process of the first pair of draw roll sets 11 and the second pair of draw roll sets 12 to carry out sufficient drafting, the fiber strength is improved as much as possible, and the other pairs of draw roll sets are configured with a low draft ratio to fully heat and shape the fibers; the nascent fibers which penetrate out of the pre-network device sequentially penetrate through the first pair of stretching roller sets, the second pair of stretching roller sets, the third pair of stretching roller sets, the fourth pair of stretching roller sets, the fifth pair of stretching roller sets and the main network device and then penetrate into the winding machine for winding; the first pair of stretching roller sets, the second pair of stretching roller sets 12, the third pair of stretching roller sets 13, the fourth pair of stretching roller sets 14 and the fifth pair of stretching roller sets 15 can carry out high-power stretching and heat setting on the passed nascent fibers 6, and the main network device 16 can further play a bundling role on the passed nascent fibers 6, so that the nascent fibers 6 which finally enter the winding machine 17 to be wound are the required high-strength chinlon 6.
Meanwhile, a side air blowing chamber is arranged at one side of the primary fiber leading-out section and is arranged at one side of the primary fiber leading-out section between the spinning machine and the first oiling device, a blowing port of the side air blowing chamber faces the primary fibers, and cold air can penetrate out of the side air blowing chamber to cool the primary fibers.
Example 2:
the embodiment provides a preparation method of a high-strength low-boiling-water-shrinkage chinlon 6 filament, which comprises the following steps of using the preparation device of the high-strength low-boiling-water-shrinkage chinlon 6 filament provided in the embodiment 1:
step S1: carrying out quantitative feeding, melting plasticization, screw shearing, water-cooling granulation, vibration screening and vacuum drying on 57-94 parts of nylon 6 slices, 5-40 parts of nano montmorillonite powder and 1-3 parts of dispersant powder in sequence, and adding a 400-800-mesh filter screen at the head of a screw shearing host machine to control the integral melting temperature of the head to 1.3-1.5 MPa before the nylon 6 slices, the nano montmorillonite powder and the dispersant powder enter the screw shearing machine for melting plasticization, so as to prepare modified nylon 6 master batch with the relative viscosity of 2.4-2.5 and the water content of less than or equal to 500 ppm; the quantitative feeding adopts a mode of linkage feeding of a main feeding position and a side feeding position, nylon 6 chips are added at the main feeding position, nano montmorillonite powder and dispersant powder are added at the side feeding position, the rotating speed of a main machine for screw shearing is preferably 540-580 r/min, the rotating speed of a main machine for a granulator for water-cooling granulation is preferably 850-1000 r/min, and the diameter of a sieve mesh for vibration screening is preferably 2-8 mm;
step S2: respectively adding the nylon-6 slices and the modified nylon-6 master batches into a screw extruder from a raw material storage tank and a batching machine according to a certain proportion for high-temperature melting and mixing to form a molten material;
and step S3: the screw extruder conveys the molten materials into the static mixer through a connecting pipeline for further mixing, the uniformly mixed molten materials are conveyed into a spinning machine through the connecting pipeline, and after the spinning machine performs spinning work on the molten materials, a melt trickle is sprayed out from a discharge end;
and step S4: cooling and solidifying the melt trickle through a side blowing air chamber to form tows, wherein the tows are nascent fibers, the nascent fibers enter a first oiling device for preliminary oiling, then are introduced into a wire guide hook, then enter a second oiling device for further oiling, and then enter a pre-networking device for uniform oil distribution;
step S5: the oiled nascent fiber sequentially enters a first pair of drawing roller sets, a second pair of drawing roller sets, a third pair of drawing roller sets, a fourth pair of drawing roller sets and a fifth pair of drawing roller sets to be subjected to multistage drawing and heat setting, and finally enters a winding machine through a main network device to be wound, and the filament bundle wound in the winding machine is nylon 6 filament with high strength and low boiling water shrinkage.
In the embodiment, the nylon 6 slices have the relative viscosity of 2.45-2.55 and the water content of less than or equal to 500ppm, and the nylon 6 slices with the relative viscosity of 2.5 +/-0.1 and the water content of 450-500 ppm can be preferably selected.
In this embodiment, the chinlon 6 chip is selected from one of bright, half-bright and full-dull, and the bright chinlon 6 chip can be preferably selected.
In this embodiment, the nano-montmorillonite is a carboxyl-containing modified nano-montmorillonite with a particle size of 600-800 nm.
In this example, the dispersant powder was selected from polyurethane, low relative molecular mass copolyamide, single type hyperdispersant powder
330, etc.
In this embodiment, the melting and plasticizing of the nylon 6 chips, the nano montmorillonite powder and the dispersant powder in the step S1 is performed in a common twin-screw extruder in the prior art, the twin-screw extruder is a twin-screw extruder with eleven temperature zones and a head temperature zone in the prior art, the first temperature zone of the twin-screw extruder is 210-245 ℃, the second temperature zone is 215-245 ℃, the third temperature zone is 220-245 ℃, the fourth, fifth and sixth temperature zones are 215-240 ℃, the seventh temperature zone is 200-215 ℃, the eighth temperature zone is 200-215 ℃, the ninth temperature zone is 195-205 ℃, the tenth temperature zone is 190-205 ℃, the eleventh temperature zone is 180-190 ℃ and the head temperature zone is 250-260 ℃.
In this embodiment, the high-temperature melting temperature of the screw extruder is 240 to 270 ℃, so that the melting temperature of the nylon-6 chips and the modified nylon-6 masterbatch in step S2 is 240 to 270 ℃.
In this embodiment, the ratio of the polyamide-6 chips to the modified polyamide-6 masterbatch is 99-80, and may be preferably 99-90, and more preferably 97-95.
In this embodiment, when the spinning machine ejects the melt stream from the ejection end, the number of the ejected melt stream streams can be determined by arranging a spinneret plate which is common in the prior art on the ejection end of the spinning machine, the shape of the selected nozzle hole on the spinneret plate can be one of a circle, a triangle, a flat and a cross, the number of the holes is 12 to 96f, and the spinneret plate with the shape of the nozzle hole being a circle and the number of the holes being 12 to 48f can be preferably selected.
In the embodiment, the side blowing temperature of the side blowing chamber is 20-24 ℃, and the wind speed is 0.35-0.5 m/s;
in the embodiment, JT-014 type oiling agents are used for the first oiling device and the second oiling device, the concentration of the oiling agents is 25-40%, and the oiling amount of the tows is kept between 1.0-1.6%.
In the embodiment, the temperature of a first pair of drawing roller sets is 50-60 ℃, the temperature of a second pair of drawing roller sets is 160-170 ℃, the draft multiple is 3.0-4.0, the temperature of a third pair of drawing roller sets is 170-200 ℃, the draft multiple is 1.2-1.3, the temperature of a fourth pair of drawing roller sets is 175-220 ℃, the draft multiple is 1.. 1-1.2, the temperature of a fifth pair of drawing roller sets is 170-200 ℃, and the four-stage draft multiple is 0.9-1.0; so that the nascent fiber that gets into among the drawing assembly can carry out the primary stretching between first pair of drawing roller set and second pair of drawing roller set, then carry out the secondary stretching and carry out primary heat setting between second pair of drawing roller set and third pair of drawing roller set, carry out tertiary stretching and carry out secondary heat setting between third pair of drawing roller set and fourth pair of drawing roller set, carry out the level four stretching and carry out tertiary heat setting between fourth pair of drawing roller set and fifth pair of drawing roller set, make final nascent fiber can carry out quartic stretching and tertiary heat setting, the nascent fiber that obtains at last can form high strength low boiling water shrinkage factor polyamide 6 filament when main network ware bundling effect gets into in the rolling machine.
In this embodiment, the as-spun fiber entering the drawing assembly may have 4.5 to 6.5 windings around the heat rolls in the first pair of drawing roll groups, the second pair of drawing roll groups, the third drawing roll group, the fourth drawing roll group, and the fifth drawing roll group.
Example 3:
sequentially carrying out quantitative feeding, melting plasticization, screw shearing, water-cooling granulation, vibration screening and vacuum drying on 80 parts of nylon 6 slices, 18 parts of nano montmorillonite powder and 2 parts of dispersant powder, and adding a 600-mesh filter screen at the head of a screw shearing host machine to control the integral melt-pressing temperature of the head to 1.4MPa before the nylon 6 slices, the nano montmorillonite powder and the dispersant powder enter the screw shearing machine through melting plasticization, so as to prepare modified nylon 6 master batches with the relative viscosity of 2.14 and the water content of 490 ppm;
in the embodiment, quantitative feeding adopts a mode of linkage feeding of a main feeding position and a side feeding position, nylon 6 slices are added at the main feeding position, nano montmorillonite powder and dispersant powder are added at the side feeding position, the rotating speed of a main machine for screw shearing is 560r/min, the rotating speed of a main machine for a granulator for water-cooling granulation is preferably 900r/min, and the diameter of a sieve mesh for vibration screening is preferably 5mm;
in this embodiment, the melting and plasticizing of the nylon-6 chips, the nano-montmorillonite powder and the dispersant powder are performed in a common twin-screw extruder in the prior art, and the twin-screw extruder is divided into eleven sections of temperature zones and a machine head temperature zone, wherein the first section of temperature zone is 215 ℃, the second section of temperature zone is 225 ℃, the third section of temperature zone is 240 ℃, the fourth, fifth and sixth sections of temperature zones are 235 ℃, the seventh section of temperature zone is 210 ℃, the eighth section of temperature zone is 205 ℃, the ninth section of temperature zone is 200 ℃, the tenth section of temperature zone is 195 ℃, the eleventh section of temperature zone is 190 ℃ and the machine head temperature zone is 255 ℃.
In this embodiment, the chinlon 6 slices are selected as bright chinlon 6 slices.
In this example, the nano-montmorillonite is a carboxyl-containing modified nano-montmorillonite having a particle size of 650 nm.
In this example, the dispersant powder was selected from a single type of hyperdispersant powder
330。
Example 4:
respectively adding 95% of nylon 6 chips and 5% of modified nylon 6 master batch into a screw extruder from a raw material storage tank and a batching machine for high-temperature melting and mixing, wherein the used modified nylon 6 master batch is the modified nylon 6 master batch prepared in the embodiment 3, the screw extruder is selected from a screw extruder with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is shown in table 1.
TABLE 1 winding process of high-strength low-boiling-water-shrinkage nylon 6 filament (40D/12F) for the present embodiment
| Device | Temperature (. Degree. C.) | Speed (m/min) | Number of turns of wire hanging |
| First pair of draw rolls | 50 | 1000 | 5.5 |
| Second pair of drawing roller sets | 162 | 3150 | 5.5 |
| Third pair of drawing roller sets | 172 | 3870 | 5.5 |
| Fourth pair of drawing roller sets | 177 | 4380 | 5.5 |
| Fifth pair of drawing roller sets | 172 | 4330 | 5.5 |
| Winding machine | / | 4200 | / |
Example 5:
100% of nylon-6 slices are added into a screw extruder from a raw material storage tank for high-temperature melting and mixing, the screw extruder is selected from screw extruders with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃ respectively;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt stream into tows through a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a guide wire hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that an oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is also shown in table 1.
Example 6:
respectively adding 95% of nylon-6 slices and 5% of modified nylon-6 master batch into a screw extruder from a raw material storage tank and a batching machine for high-temperature melting and mixing, wherein the used modified nylon-6 master batch is the modified nylon-6 master batch prepared in example 3, the screw extruder is selected from screw extruders with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing is carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, first heat setting is carried out, third-stage drawing is carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, second-stage drawing is carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, third-stage heat setting is carried out, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate nylon 6 filament.
The properties of the nylon-6 filament with high strength and low boiling water shrinkage obtained in this example are shown in table 5.
The winding process in this example is shown in table 2.
TABLE 2 winding process of high-strength low-boiling-water-shrinkage nylon 6 filament (40D/12F) for this embodiment
Example 7:
adding 100% of nylon-6 slices from a raw material storage tank into a screw extruder for high-temperature melting and mixing, wherein the screw extruder is selected from screw extruders with five-zone temperatures commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃ respectively;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine performs spinning work on the molten material and then sprays out melt trickle from a discharge end;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is also shown in table 2.
Example 8:
respectively adding 95% of nylon-6 slices and 5% of modified nylon-6 master batch into a screw extruder from a raw material storage tank and a batching machine for high-temperature melting and mixing, wherein the used modified nylon-6 master batch is the modified nylon-6 master batch prepared in example 3, the screw extruder is selected from screw extruders with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is shown in table 3.
TABLE 3 winding process of high-strength low-boiling-water-shrinkage nylon 6 filament (40D/12F) for this embodiment
| Device | Temperature (. Degree.C.) | Speed (m/min) | Number of turns of wire |
| First pair of draw rolls | 50 | 1000 | 5.5 |
| Second pair of drawing roller sets | 175 | 3150 | 5.5 |
| Third pair of drawing roller sets | 195 | 3870 | 5.5 |
| Fourth pair of drawing roller sets | 210 | 4380 | 5.5 |
| Fifth pair of drawing roller sets | 205 | 4330 | 5.5 |
| Winding machine | / | 4200 | / |
Example 9:
adding 100% of nylon-6 slices from a raw material storage tank into a screw extruder for high-temperature melting and mixing, wherein the screw extruder is selected from screw extruders with five-zone temperatures commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃ respectively;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is also shown in table 3.
Example 10:
respectively adding 95% of nylon-6 slices and 5% of modified nylon-6 master batch into a screw extruder from a raw material storage tank and a batching machine for high-temperature melting and mixing, wherein the used modified nylon-6 master batch is the modified nylon-6 master batch prepared in example 3, the screw extruder is selected from screw extruders with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is shown in table 4.
TABLE 4 winding process of high-strength low-boiling-water-shrinkage nylon 6 filament (40D/12F) for this embodiment
| Device | Temperature (. Degree.C.) | Speed (m/min) | Number of turns of wire |
| First hot roller pair | 50 | 1000 | 5.5 |
| Second pair of hot rollers | 175 | 3150 | 5.5 |
| Third pair of hot rollers | 195 | 3870 | 5.5 |
| Fourth pair of hot rollers | 210 | 4380 | 5.5 |
| Fifth pair of hot rollers | 215 | 4330 | 5.5 |
| Winding device | / | 4200 | / |
Example 11:
100% of chinlon 6 slices are added into a screw extruder from a raw material storage tank for high-temperature melting and mixing, the screw extruder is a screw extruder with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and the fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃ respectively;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt stream into tows through a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a guide wire hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that an oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing is carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, first heat setting is carried out, third-stage drawing is carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, second-stage drawing is carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, third-stage heat setting is carried out, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate nylon 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is also shown in table 4.
Example 12:
97.5 percent of nylon-6 slices and 2.5 percent of modified nylon-6 master batch are respectively added into a screw extruder from a raw material storage tank and a batching machine for high-temperature melting and mixing, the used modified nylon-6 master batch is the modified nylon-6 master batch prepared in the embodiment 3, the screw extruder is selected from screw extruders with five zones of temperature commonly seen in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are respectively 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is also shown in table 4.
Example 13:
respectively adding 90% of nylon-6 slices and 10% of modified nylon-6 master batch into a screw extruder from a raw material storage tank and a batching machine for high-temperature melting and mixing, wherein the used modified nylon-6 master batch is the modified nylon-6 master batch prepared in example 3, the screw extruder is selected from screw extruders with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt stream into tows through a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a guide wire hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that an oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is also shown in table 4.
Example 14:
respectively adding 85% of nylon-6 slices and 15% of modified nylon-6 master batch into a screw extruder from a raw material storage tank and a batching machine for high-temperature melting and mixing, wherein the used modified nylon-6 master batch is the modified nylon-6 master batch prepared in example 3, the screw extruder is selected from screw extruders with five zones of temperature commonly used in the prior art, and the melting temperatures of a first zone, a second zone, a third zone, a fourth zone and a fifth zone of the screw extruder are 245 ℃, 250 ℃, 255 ℃, 259 ℃ and 260 ℃;
the screw extruder conveys the molten material to the static mixer through a melt distribution pipeline, and then conveys the molten material to the spinning machine through the melt distribution pipeline, and the spinning machine sprays melt trickle from the discharge end after spinning the molten material;
cooling and solidifying the melt trickle by a side blowing air chamber with the temperature of 22.5 ℃, the air speed of 0.5m/s and the relative humidity of 85 percent to form tows, feeding the tows into a first oiling device with the oil distribution concentration of 30 percent for preliminary oiling, then introducing a wire guide hook, feeding into a second oiling device with the oil distribution concentration of 30 percent for further oiling, and feeding into a pre-interlacer to ensure that the oiling agent is more uniformly adhered to the tows;
the oiling filament bundle enters a first pair of drawing roller sets after being fed through a godet roller, then secondary drawing and primary heat setting are carried out between a second pair of drawing roller sets and a third pair of drawing roller sets, tertiary drawing and secondary heat setting are carried out between the third pair of drawing roller sets and a fourth pair of drawing roller sets, quaternary drawing and tertiary heat setting are carried out between the fourth pair of drawing roller sets and a fifth pair of drawing roller sets, and the filament bundle after multistage drawing and heat setting enters a winding machine through a main network device to form high-strength low-boiling-water-shrinkage-rate polyamide 6 filament.
The properties of the high-strength low-boiling-water-shrinkage nylon-6 filament obtained in this example are shown in table 5.
The winding process in this example is shown in table 5.
TABLE 5 Properties of the products of the examples and comparative examples
As shown in Table 5, with the increase of the heat setting temperature, the breaking strength of the nylon-6 filament added with the nano montmorillonite is obviously improved compared with that of the nylon-6 filament not added with the nano montmorillonite, which indicates that the nano montmorillonite can effectively improve the breaking strength of the nylon-6 molecular fiber under the high-temperature condition; under the conditions of the same drafting multiple and the same heat setting temperature, the content of the nano montmorillonite is increased, the breaking strength of the nylon 6 filament is firstly improved and then reduced, which shows that the crystallization rate of the nylon 6 is improved and the fiber strength is improved by adding a small amount of the nano montmorillonite. However, when the content of the nano montmorillonite is more than 2%, the crystallization rate is delayed and the crystallinity is reduced due to agglomeration and the limitation of the high-content nano montmorillonite on the movement capacity of the nylon 6 molecular chain, so that the strength is reduced.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a preparation facilities of low boiling water shrinkage factor polyamide fibre 6 filament of high strength, includes raw materials holding vessel, proportioning machine, screw extruder, static mixer and spinning machine, and the discharge end of raw materials holding vessel and proportioning machine all connects on screw extruder's feed end, and screw extruder's discharge end links together through the mode of pipe connection and static mixer's feed end, and static mixer's discharge end links together its characterized in that through the mode that sets up pipe connection and spinning machine's feed end: and the discharge end of the spinning machine is externally led out with nascent fibers, the led-out nascent fibers sequentially pass through a first oil feeder, a yarn guide hook, a second oil feeder and a pre-network device and then penetrate into a stretching assembly, and the stretching assembly is used for performing high-power stretching on the penetrated nascent fibers.
2. The device for preparing the nylon 6 filament with high strength and low boiling water shrinkage as claimed in claim 1, wherein: the stretching assembly comprises a first pair of stretching roller sets, a second pair of stretching roller sets, a third pair of stretching roller sets, a fourth pair of stretching roller sets, a fifth pair of stretching roller sets and a main network device, and nascent fibers penetrating out of the network device in advance penetrate into the winder after sequentially passing through the first pair of stretching roller sets, the second pair of stretching roller sets, the third pair of stretching roller sets, the fourth pair of stretching roller sets, the fifth pair of stretching roller sets and the main network device.
3. The device for preparing the chinlon 6 filament with high strength and low boiling water shrinkage as claimed in claim 1, is characterized in that: and a side air blowing chamber is arranged at one side of the primary fiber leading-out section and is arranged at one side of the primary fiber leading-out section between the spinning machine and the first oiling device.
4. A preparation method of high-strength low boiling water shrinkage chinlon 6 filament is characterized by comprising the following steps of using the preparation device of the high-strength low boiling water shrinkage chinlon 6 filament as claimed in any one of claims 1 to 3:
the preparation method comprises the following steps of sequentially carrying out quantitative feeding, melting plasticization, screw shearing, water-cooling granulation, vibration screening and vacuum drying on nylon 6 slices, nano montmorillonite powder and dispersant powder, and before the nylon 6 slices, the nano montmorillonite powder and the dispersant powder enter the screw shearing step through melting plasticization, adding a filter screen with 400-800 meshes at the head of a screw shearing host machine to control the integral melting temperature of the head to 1.3-1.5 MPa, thus preparing the modified nylon 6 master batch with the relative viscosity of 2.4-2.5 and the water content of less than or equal to 500 ppm;
respectively adding the chinlon 6 slices and the modified chinlon 6 master batches into a screw extruder from a raw material storage tank and a batching machine according to a certain proportion for high-temperature melting and mixing to form a molten material;
the screw extruder conveys the molten materials into a static mixer through a connecting pipeline for further mixing, the uniformly mixed molten materials are conveyed into a spinning machine through the connecting pipeline, and after the spinning machine performs spinning work on the molten materials, a melt trickle is sprayed out from a discharge end;
the melt trickle is cooled and solidified into tows through a side blowing chamber, the tows are nascent fibers, the nascent fibers enter a first oiling device for preliminary oiling, then a guide wire hook is introduced, the nascent fibers enter a second oiling device for further oiling, and then the nascent fibers enter a pre-networking device for uniform oil distribution;
and (3) the oiled nascent fibers sequentially enter a first pair of drawing roller sets, a second pair of drawing roller sets, a third pair of drawing roller sets, a fourth pair of drawing roller sets and a fifth pair of drawing roller sets to be subjected to multistage drawing and heat setting, and finally enter a winding machine through a main network device to be wound, and the filament bundles wound in the winding machine are nylon 6 filaments with high strength and low boiling water shrinkage.
5. The preparation method of nylon 6 filament with low boiling water shrinkage as claimed in claim 4, wherein 57-94 parts of nylon 6 chips, 5-40 parts of nano montmorillonite and 1-3 parts of dispersing agent powder are selected.
6. The preparation method of the nylon 6 filament with the low boiling water shrinkage rate as claimed in claim 4, wherein the preparation method comprises the following steps: the polyamide-6 chip is prepared from polyamide-6 chips with relative viscosity of 2.45-2.55 and water content of less than or equal to 500ppm, the ratio of the polyamide-6 chips to the modified polyamide-6 master batch is 99-80, and the dispersing agent powder is polyurethane, low relative molecular mass copolyamide and single type hyperdispersant powder
330, etc.
7. The preparation method of the low boiling water shrinkage polyamide 6 filament yarn as claimed in claim 4, wherein the preparation method comprises the following steps: the melting plasticization of the nylon-6 chips, the nano montmorillonite powder and the dispersing agent powder is carried out in a double-screw extruder, the double-screw extruder is divided into eleven sections of temperature zones and a machine head temperature zone, the first section of temperature zone is 210-245 ℃, the second section of temperature zone is 215-245 ℃, the third section of temperature zone is 220-245 ℃, the fourth, fifth and sixth sections of temperature zones are 215-240 ℃, the seventh section of temperature zone is 200-215 ℃, the eighth section of temperature zone is 200-215 ℃, the ninth section of temperature zone is 195-205 ℃, the tenth section of temperature zone is 190-205 ℃, the eleventh section of temperature zone is 180-190 ℃ and the machine head temperature zone is 250-260 ℃.
8. The preparation method of the high-strength low-boiling-water-shrinkage chinlon 6 filament yarn as claimed in claim 4, wherein the high-temperature melting temperature of the screw extruder is 240-270 ℃.
9. The method for preparing nylon 6 filament with high strength and low boiling water shrinkage as claimed in claim 4, wherein the side blowing temperature of the side blowing chamber is 20-24 ℃, the wind speed is 0.35-0.5 m/s, the first oiling device and the second oiling device both use JT-014 type oiling agent, the concentration of the oiling agent is 25-40%, and the oiling amount is kept between 1.0-1.6%.
10. The method for preparing high-strength low-boiling water shrinkage chinlon 6 filament according to claim 4, wherein the temperature of the first pair of drawing roller sets is 50-60 ℃, the temperature of the second pair of drawing roller sets is 160-170 ℃, the draft ratio is 3.0-4.0, the temperature of the third pair of drawing roller sets is 170-200 ℃, the draft ratio is 1.2-1.3, the temperature of the fourth pair of drawing roller sets is 175-220 ℃, the draft ratio is 1.
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