CN114875501A - Production method of PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn - Google Patents
Production method of PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn 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
- D01D5/08—Melt spinning methods
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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
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
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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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a production method of a PA56/PA6 bio-based different-color stripe composite elastic nylon yarn, which comprises the steps of adding bio-based slices, compounding common nylon slices, optimizing the production process, producing the bio-based different-color composite yarn through high-speed spinning, controlling the network air pressure, and developing the bio-based different-color stripe composite elastic nylon yarn fiber capable of meeting the development requirements of high-end markets through a one-step stretching deformation technology on an elasticizer. The invention ensures the style of the special-shaped color strips of the product, the production of the product is more stable, the style of the strips is clearer, the performance is greatly improved, and the development of the product is suitable for the current energy-saving and environment-friendly international trend, so the invention has wide market prospect.
Description
Technical Field
The invention relates to the technical field of synthetic fiber production, in particular to a production method of PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn.
Background
The color silk fabric has a color pattern style of dyeing different colors, the length pattern of the stripes can be adjusted according to the aesthetic visual requirement, the visual aesthetic requirement of a user can be met, the hand feeling is soft and greasy, and the moisture absorption effect is obvious.
The nylon elastic yarn developed by the technical achievement nylon colorful filament released by the unit in 2017 is produced by adopting two PA6 slices (one of the raw materials is a PA6 deep-dyed slice) with different color absorption effects through a melt blending technology. The product has double-color effect and is widely applied.
However, the production of the product has a phenomenon of poor dyeing stripe effect in the long-term mass production process. Because dark dyeing nylon 6 section is through high-speed spinning, although later stage printing and dyeing is colored fast, the color is more bright-colored, and the dyestuff high-usage is used for the processing of degree of depth color surface fabric, and the glossiness is good. However, if the process is not properly controlled, spinnability and dyeing effect are greatly compromised. The production of the deep-dyed slices is unstable, so that the phenomenon that dyeing stripes are fuzzy and not clear enough exists in the production process of the products. Therefore, in order to ensure that the colorful silk product with excellent effect is produced, the requirement on the stability of the slices is higher.
Since most of the series of products are exported abroad, are used in the fields of sports clothes, underwear and the like, and have large demand and high demand, the development of an upgraded and replaced product becomes a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a production method of PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn, which ensures the style of special-shaped color stripes of a product, ensures the production of the product to be more stable, ensures the stripe style to be clearer, greatly improves the performance, and adapts to the current energy-saving and environment-friendly international trend, thereby having wide market prospect.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a production method of PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn comprises the following steps:
(1) preparation of POY yarn of PA56 and PA6 raw materials:
putting the dried PA56 raw material slices into a storage bin, melting the raw material slices by a screw extruder, accurately metering the raw material slices by a metering pump, then spinning by a spinning box and a spinning assembly, cooling by side blowing, oiling by an oil nozzle, eliminating static electricity and increasing tow bundling property, then sequentially passing through a networkable, a first godet roller and a second godet roller, and finally winding and forming to obtain POY1 prepared from PA 56;
putting the dried PA6 raw material slices into a storage bin, melting the raw material slices by a screw extruder, accurately metering the raw material slices by a metering pump, then spinning by a spinning box and a spinning assembly, cooling by side blowing, oiling by an oil nozzle, eliminating static electricity and increasing tow bundling property, then sequentially passing through a networkable, a first godet roller and a second godet roller, and finally winding and forming to obtain POY2 prepared from PA 6;
(2) one-step stretching deformation:
the balanced POY1 and POY2 pass through a yarn guide tube and a yarn cutter to a first roller, pass through a twist stopper and the yarn cutter to a hot box, are heated and shaped, eliminate stress, are cooled by a cooling plate, pass through a false twister to be twisted and deformed, and pass through a second roller; and then sequentially passing through a networker and an auxiliary roller, oiling by an oil roller to increase the saturation of the tows and eliminate static electricity, and finally winding and forming to obtain the PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn.
According to the invention, the bio-based chips are added, the common nylon chips are compounded, the production process is optimized, the bio-based heterochromatic composite yarns are produced through high-speed spinning, the network air pressure is controlled, and the bio-based heterochromatic stripe compound elastic nylon yarn fiber capable of meeting the development requirements of high-end markets is developed on an elasticizer through a one-step stretching deformation technology.
For bio-based heterochromatic composite silk fiber products, the key to having a heterochromatic effect is the characteristics of the yarn. Not only the stable spinnability of the product is ensured, but also the stable color effect of the finished product is ensured. The production of such products is therefore somewhat challenging.
There are currently two ways to produce different color filaments: firstly, common yarns are selected to be dyed with two colors in the subsequent process and then are woven by a special weaving process, but the mode has certain difficulty in dyeing and finishing, certain skills in weaving and high product cost. The product of the invention is more efficient and practical. The method is realized by carrying out composite spinning by using raw materials with different color absorbing properties during yarn production to directly produce composite yarns, and then simply dyeing and weaving by using the same dye to present different color stripe styles. Meanwhile, different from the production of the conventional different-color silk, the raw materials are produced by compounding two polyamide 6 slices with different color absorbing effects (one of the raw materials is a deep-dyed PA6 slice), however, the invention particularly uses the bio-based nylon slice to replace the deep-dyed polyamide slice, so that the color stripe style of the product is clearer, the product also has the excellent performances of green, environment-friendly, soft, easy dyeing, moisture absorption and quick drying, high strength, good wear resistance and the like of the bio-based fiber, and the bio-based nylon slice is widely applied to the fields of sportswear, yoga clothes, underwear and the like.
In the traditional production of the different-color silk, although one of the raw materials is a specially developed deep-dyed slice, the slice has high content of terminal amino groups, and the color absorbing effect is improved by utilizing the strong interaction between the terminal amino groups and acid dye molecules. However, if the process is improperly controlled, the spinnability (end breakage rate) and dyeing effect are greatly reduced, the dyeing stripe effect is not clear, the cloth cover patterns are fuzzy, and the like, and the stripe style has deviation.
The invention adopts the replacement of the bio-based slice, well solves the defects of unstable fiber dyeing and the like, leads the product to have better spinnability, improves the breaking strength of the fiber product from 3.32 to 4.02CN/dtex, not only saves energy consumption, but also greatly improves the economic benefit of the product.
Preferably, POY1 is prepared by: the temperature of each zone of the screw extruder is controlled as follows: between 270 ℃ and 280 ℃; the melting temperature of the melt is controlled between 270 ℃ and 279 ℃; the pressure of the component is controlled between 15 and 18 MPa.
Preferably, POY1 and POY2 when prepared: the wind speed of the cross wind is 0.38-0.55m/s, the wind temperature is 17.5-18.5 ℃, and the rheumatism: 90-95%; the blowing direction of the cross air blower is vertical to the spinneret orifice; the oiling rate is controlled to be 1.6-1.8%.
Preferably, POY1 is prepared by: the network pressure is controlled between 0.15 and 0.18 MPa; the speed of the first wire guide roller is 4800-4990 m/min; the speed of the second wire guide roller is 4900-5200 m/min; the stretching ratio is controlled between 1 and 1.2; the winding speed is controlled between 4800 and 5000 m/min.
Preferably, POY2 is prepared by: the temperature of each zone of the screw extruder is controlled as follows: 250-256 deg.c; the melting temperature of the melt is controlled between 250 ℃ and 253 ℃; the pressure of the component is controlled between 15 and 17 MPa.
Preferably, POY2 is prepared by: the network pressure is controlled between 0.15 and 0.17 MPa; the speed of the first guide wire roller is 4200-; the speed of the second wire guide roller is 4300-; the stretching ratio is controlled between 1 and 1.2; the winding speed is controlled between 4300-.
Preferably, the fineness of the POY1 is controlled to be 20-95D, and the number of pores is controlled to be 12-96 f; the fineness of the POY2 is controlled to be 20-95D, and the number of pores is controlled to be 12-96 f.
Preferably, in step (2), the draw ratio is controlled to be 1.2-1.25, the temperature of the hot box is controlled to be 165-170 ℃, the speed ratio D/Y of the false twister is controlled to be 1.55-1.7, the rotating speed of the oil roller is controlled to be 0.6-0.8rpm, and the spinning speed is controlled to be 430-460 m/min.
Preferably, in the step (2), the titer of the PA56/PA6 bio-based heterostrip composite elastic nylon yarn is controlled to be 30-150D, and the number of holes is controlled to be 24-192 f.
Preferably, the PA56/PA6 bio-based heterochromatic striped composite elastic nylon yarn contains 45-55wt% of PA56 and 45-55wt% of PA 6.
The invention has the beneficial effects that: the special-shaped color stripe shape of the fiber ensures that the product has good comfort and visual effect besides good greasy hand feeling. Meanwhile, the product has the excellent performances of environmental protection, softness, easy dyeing, moisture absorption and quick drying, high strength, good wear resistance and the like by combining the biobased characteristics of the raw materials, and is widely applied to the fields of sportswear, yoga clothes, underwear and the like.
Drawings
FIG. 1 is a flow chart of POY raw material spinning of the present invention.
FIG. 2 is a flow chart of the one-step texturing preparation of PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn of the present invention;
in fig. 2, the reference numerals represent: 1-stock bin, 2-screw extruder, 3-spinning box, 4-component (spinneret), 5-side air blowing window, 6-shaft, 7-godet rod, 8-network device, 9-first godet roller, 10-second godet roller and 11-winding bobbin.
Figure 3 is a photograph of a swatch formed after dyeing of a product of the invention.
FIG. 4 is a photograph of a cloth sample formed after dyeing a product produced by using two PA6 slices with different color absorbing effects.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples.
In the present invention, the raw materials and equipment used are commercially available or commonly used in the art, unless otherwise specified. The methods in the following examples are conventional in the art unless otherwise specified.
Example 1:
firstly, preparing two POY raw materials by melt spinning (the specific flow is shown in figure 1):
1. POY 1: preparation of PA 56:
production raw materials: kaiser biological PA56 deep-dyed semi-light section
The operation procedure is as follows:
(1) putting the dried semi-dull PA56 slices into a storage bin, melting by a screw extruder, accurately metering and distributing by a metering pump, and then, allowing the semi-dull PA56 slices to enter a spinning box to be spun by a component spinneret plate; the temperature of each zone of the screw extruder is controlled as follows: between 270 ℃ and 280 ℃ (five zones: 270 ℃, 275 ℃, 278 ℃, 278 ℃, 280 ℃); the melting temperature of the melt is controlled at 275 ℃; the pressure of the assembly is controlled at 17 MPa.
(2) Cooling by cross air blow, and oiling and bundling by an oil nozzle; the wind speed of the cross air blow is 0.38m/s, the wind temperature is 17.5 ℃, and the wind speed is: 90 percent; the blowing direction of the cross air blowing is vertical to the spinneret orifice. The oiling rate is controlled at 1.6% to eliminate static electricity and increase strand integrity.
(3) The tows pass through a network device, a first godet GR1 and a second godet GR2, and finally are wound and formed.
The network pressure is controlled to be between 0.18 MPa; the speed of the first godet GR1 is 4800 m/min; the speed of the second godet GR2 was 4900 m/min; the stretching ratio is controlled to be 1; the winding speed was controlled at 5000 m/min.
(4) The POY fineness of PA56 was controlled to 25D and the number of cells was controlled to 12 f.
2. POY 2: preparation of PA 6:
production raw materials: polymerized cis-PA 6 semi-optical section
The operation procedure is as follows:
(1) putting the dried semi-dull PA6 slices into a storage bin, melting by a screw extruder, accurately metering and distributing by a metering pump, and then, allowing the semi-dull PA6 slices to enter a spinning box to be spun by a component spinneret plate; the temperature of each zone of the screw extruder is controlled as follows: 250-256 deg.C (five zones: 250 deg.C, 252 deg.C, 254 deg.C, 256 deg.C); controlling the melting temperature of the melt at 250 ℃; the pressure of the assembly is controlled at 15 MPa.
(2) Cooling by cross air blow, and oiling and bundling by an oil nozzle; the wind speed of the cross air blow is 0.38m/s, the wind temperature is 17.5 ℃, and the wind speed is: 90 percent; the blowing direction of the cross air blowing is vertical to the spinneret orifice. The oiling rate is controlled at 1.6% to eliminate static electricity and increase strand integrity.
(3) The tows pass through a network device, a first godet GR1 and a second godet GR2, and finally are wound and formed.
The network pressure is controlled to be between 0.15 MPa; the speed of the first godet GR1 was 4200 m/min; the speed of the second godet GR2 is 4300 m/min; the stretching ratio is controlled to be 1; the winding speed is controlled to 4300 m/min.
(4) The fineness of the PA6 raw material is controlled to be 25D, and the number of holes is controlled to be 12 f.
Secondly, preparing the PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn by one-step texturing (the specific process is shown in figure 2);
the operation procedure is as follows:
(1) the method comprises the following steps of adopting a one-step stretching deformation process, respectively passing two POY raw materials (POY 1 and POY 2) which are well balanced (specifically, the POY raw materials are put in a constant-temperature and constant-humidity environment after being prepared and are put on a machine for about 8-12 h) through a yarn guide pipe, a yarn cutter to a first roller, a twist stopper and a gourd yarn guide to a hot box, heating for shaping and eliminating stress, cooling through a cooling plate, twisting and deforming through a false twister and passing through a second roller; then the silk bundle is oiled by an oil roller through a networker and an auxiliary roller in sequence to increase the saturation of the silk bundle and eliminate static electricity, and finally the silk bundle is wound and formed.
(2) The two POY are respectively 25D/12f PA56 and PA6 raw materials; the stretching ratio is controlled to be 1.2, and the strand silk can obtain orientation in the direction of acting force through stretching, so that the fibers are rearranged and generate elastic deformation and plastic deformation;
(3) the temperature of the hot box is controlled at 165 ℃, and the twisting stress is eliminated by utilizing thermal motion, so that the twisting deformation can not be recovered and heat setting is carried out; the speed ratio D/Y of the false twister is controlled to be 1.55, so that the false twist of filament yarns can be increased, the cohesive force of filament bundles can be improved, the residual torque can be reduced, the fluctuation of front and rear tension of a friction disc can be reduced, and the stable production operation is facilitated;
(4) the rotating speed of the oil roller is controlled at 0.6rpm, and the spinning speed is controlled at 430 m/min;
(5) the fineness of the PA56/PA6 bio-based heterochromatic striped composite elastic nylon yarn is controlled at 40D, the number of holes is controlled at 24f, the raw material PA56 accounts for 45wt%, and the PA6 accounts for 55 wt%.
Example 2:
firstly, preparing two POY raw materials by melt spinning (the specific flow is shown in figure 1):
1. POY 1: preparation of PA 56:
production raw materials: kaiser biological PA56 deep-dyed semi-light section
The operation procedure is as follows:
(1) putting the dried semi-dull PA6 slices into a storage bin, melting by a screw extruder, accurately metering and distributing by a metering pump, and then, allowing the semi-dull PA6 slices to enter a spinning box to be spun by a component spinneret plate; the temperature of each zone of the screw extruder is controlled as follows: between 270 ℃ and 280 ℃ (five zones: 270 ℃, 275 ℃, 278 ℃, 278 ℃, 280 ℃); controlling the melting temperature of the melt at 270 ℃; the pressure of the assembly is controlled at 18 MPa.
(2) Cooling by cross air blow, and oiling and bundling by an oil nozzle; the wind speed of the cross air blow is 0.55m/s, the wind temperature is 18.5 ℃, and the rheumatism: 95 percent; the blowing direction of the cross air blowing is vertical to the spinneret orifice. The oiling rate is controlled at 1.8% to eliminate static electricity and increase strand integrity.
(3) The tows pass through a network device, a first godet GR1 and a second godet GR2, and finally are wound and formed.
The network pressure is controlled to be 0.18 MPa; the speed of the first godet GR1 was 4990 m/min; the speed of the second godet GR2 was 5200 m/min; the stretching ratio is controlled to be 1.04; the winding speed was controlled at 5000 m/min.
(4) The fineness of the PA56 raw material is controlled at 95D, and the number of holes is controlled at 72 f.
2. POY 2: preparation of PA 6:
production raw materials: polymerized cis-PA 6 semi-optical section
The operation procedure is as follows:
(1) putting the dried semi-dull PA6 slices into a storage bin, melting by a screw extruder, accurately metering and distributing by a metering pump, and then, allowing the semi-dull PA6 slices to enter a spinning box to be spun by a component spinneret plate; the temperature of each zone of the screw extruder is controlled as follows: 250-256 deg.c (five zones: 250 deg.c, 252 deg.c, 254 deg.c, 256 deg.c); controlling the melting temperature of the melt at 253 ℃; the pressure of the assembly is controlled at 17 MPa.
(2) Cooling by cross air blow, and oiling and bundling by an oil nozzle; the wind speed of the cross air blow is 0.55m/s, the wind temperature is 18.5 ℃, and the rheumatism: 95 percent; the blowing direction of the cross air blowing is vertical to the spinneret orifice. The oiling rate is controlled at 1.8% to eliminate static electricity and increase strand integrity.
(3) The tows pass through a network device, a first godet GR1 and a second godet GR2, and finally are wound and formed.
The network pressure is controlled to be 0.17 MPa; the speed of the first godet GR1 is 4300 m/min; the speed of the second godet roller GR2 is 4400 m/min; the stretching ratio is controlled to be 1.02; the winding speed was controlled at 4400 m/min.
(4) The fineness of the PA6 raw material is controlled at 95D, and the number of holes is controlled at 72 f.
Secondly, preparing the PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn by one-step texturing (the specific process is shown in figure 2);
the operation procedure is as follows:
(1) the method comprises the following steps of (1) adopting a one-step stretching deformation process, enabling two balanced POY raw materials to respectively pass through a yarn guide pipe, a yarn cutter to a first roller, a twist stopper and a gourd yarn guide to a hot box, heating for shaping and eliminating stress, cooling through a cooling plate, twisting and deforming through a false twister, and enabling the two balanced POY raw materials to pass through a second roller; then the silk bundle is oiled by an oil roller through a networker and an auxiliary roller in sequence to increase the saturation of the silk bundle and eliminate static electricity, and finally the silk bundle is wound and formed.
(2) The two POY are respectively 95D/72f PA56 and PA6 raw materials; the stretching ratio is controlled to be 1.25, the strand silk can obtain orientation in the direction of acting force through stretching, fibers are rearranged, and elastic deformation and plastic deformation occur;
(3) the temperature of the hot box is controlled at 170 ℃, and the twisting stress is eliminated by utilizing thermal motion, so that the twisting deformation can not be recovered and heat setting is carried out; the speed ratio D/Y of the false twister is controlled to be 1.7, so that the false twist of filament yarns can be increased, the cohesive force of filament bundles can be improved, the residual torque can be reduced, the fluctuation of the front and rear tension of the friction disc can be reduced, and the stable production operation can be facilitated;
(4) the rotating speed of the oil roller is controlled at 0.8rpm, and the spinning speed is controlled at 460 m/min;
(5) the titer of the PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn is controlled to be 150D, and the number of holes is controlled to be 144 f; 55wt% of raw material PA56 and 45wt% of raw material PA 6. .
Example 3:
firstly, preparing two POY raw materials by melt spinning (the specific flow is shown in figure 1):
1. POY 1: preparation of PA 56:
production raw materials: kaiser biological PA56 deep-dyed semi-light section
The operation procedure is as follows:
(1) putting the dried semi-dull PA56 slices into a storage bin, melting by a screw extruder, accurately metering and distributing by a metering pump, and then, allowing the semi-dull PA56 slices to enter a spinning box to be spun by a component spinneret plate; the temperature of each zone of the screw extruder is controlled as follows: between 270 ℃ and 280 ℃ (five zones: 270 ℃, 275 ℃, 278 ℃, 278 ℃, 280 ℃); the melting temperature of the melt was controlled at 279 ℃; the pressure of the assembly is controlled at 17 MPa.
(2) Cooling by cross air blow, and oiling and bundling by an oil nozzle; the wind speed of the cross air blow is 0.45m/s, the wind temperature is 18 ℃, and the wind speed is: 92 percent; the blowing direction of the cross air blowing is vertical to the spinneret orifice. The oiling rate is controlled at 1.7% to eliminate static electricity and increase strand integrity.
(3) The tows pass through a network device, a first godet GR1 and a second godet GR2, and finally are wound and formed.
The network pressure is controlled to be 0.17 MPa; the speed of the first godet GR1 was 4900 m/min; the speed of the second godet roller GR2 is 5000 m/min; the stretching ratio is controlled to be 1.02; the winding speed is controlled between 4900 m/min.
(4) The fineness of the PA56 raw material was controlled at 47D, and the number of holes was controlled at 24 f.
2. POY 2: preparation of PA 6:
production raw materials: polymerized cis-PA 6 semi-optical section
The operation procedure is as follows:
(1) putting the dried semi-dull PA6 slices into a storage bin, melting by a screw extruder, accurately metering and distributing by a metering pump, and then, allowing the semi-dull PA6 slices to enter a spinning box to be spun by a component spinneret plate; the temperature of each zone of the screw extruder is controlled as follows: 250-256 deg.C (five zones: 250 deg.C, 252 deg.C, 254 deg.C, 256 deg.C, 254 deg.C); the melting temperature of the melt is controlled at 252 ℃; the pressure of the assembly is controlled at 16 MPa.
(2) Cooling by cross air blow, and oiling and bundling by an oil nozzle; the wind speed of the cross air blow is 0.45m/s, the wind temperature is 18 ℃, and the wind speed is: 92 percent; the blowing direction of the cross air blowing is vertical to the spinneret orifice. The oiling rate is controlled at 1.7% to eliminate static electricity and increase strand integrity.
(3) The tows pass through a network device, a first godet GR1 and a second godet GR2, and finally are wound and formed.
The network pressure is controlled to be 0.16 MPa; the speed of the first godet roller GR1 is 4250 m/min; the speed of the second godet GR2 was 4350 m/min; the stretching ratio is controlled to be 1.02; the winding speed is controlled between 4350 m/min.
(4) The fineness of the PA6 raw material was controlled at 47D, and the number of pores was controlled at 36 f.
Secondly, preparing the PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn by one-step texturing (the specific process is shown in figure 2);
the operation procedure is as follows:
(1) the method comprises the following steps of (1) adopting a one-step stretching deformation process, enabling two balanced POY raw materials to respectively pass through a yarn guide pipe, a yarn cutter to a first roller, a twist stopper and a gourd yarn guide to a hot box, heating for shaping and eliminating stress, cooling through a cooling plate, twisting and deforming through a false twister, and enabling the two balanced POY raw materials to pass through a second roller; then the silk bundle is oiled by an oil roller through a networker and an auxiliary roller in sequence to increase the saturation of the silk bundle and eliminate static electricity, and finally the silk bundle is wound and formed.
(2) PA56 and PA6 feedstocks for the two POYs; the stretching ratio is controlled to be 1.22, the strand silk can obtain orientation in the direction of acting force through stretching, fibers are rearranged, and elastic deformation and plastic deformation occur;
(3) controlling the temperature of the hot box at 168 ℃, and eliminating the twisting stress by utilizing thermal motion to ensure that the twisting deformation can not be recovered and heat setting is carried out; the speed ratio D/Y of the false twister is controlled to be 1.6, so that the false twist of filament yarns can be increased, the cohesive force of filament bundles can be improved, the residual torque can be reduced, the fluctuation of the front and rear tension of the friction disc can be reduced, and the stable production operation can be facilitated;
(4) the rotating speed of the oil roller is controlled at 0.7rpm, and the spinning speed is controlled at 450 m/min;
(5) the fineness of the PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn is controlled at 80D, and the number of holes is controlled at 60 f; the raw material PA56 accounts for 50wt%, and PA6 accounts for 50 wt%.
The PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn prepared by the embodiment of the invention has the following comprehensive properties after being tested:
breaking strength is more than or equal to 3.71CN/dtex, and breaking elongation (%): m1 + -5, M1 is the central value of the elongation at break, and is within the range of 25-50%; shrinkage in boiling water/%: m2 +/-1.5, wherein M2 is the central value of boiling water shrinkage and is within the range of 5.5-10%; crimp shrinkage: not less than 40%, curl stability: not less than 40 percent. The silk thread bundling performance is good, the dyeing stripes are clear, and the product also has the excellent performances of environmental protection, softness and easy dyeing of bio-based products.
The yarn dyed by the product of the invention and the formed cloth-like stripe are clear (figure 3), while the cloth-like stripe formed by the existing product is fuzzy.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (10)
1. A production method of PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn is characterized by comprising the following steps:
(1) preparation of POY yarn of PA56 and PA6 raw materials:
putting the dried PA56 raw material slices into a storage bin, melting the raw material slices by a screw extruder, accurately metering the raw material slices by a metering pump, then spinning by a spinning box and a spinning assembly, cooling by side blowing, oiling by an oil nozzle, eliminating static electricity and increasing tow bundling property, then sequentially passing through a networkable, a first godet roller and a second godet roller, and finally winding and forming to obtain POY1 prepared from PA 56;
putting the dried PA6 raw material slices into a storage bin, melting the raw material slices by a screw extruder, accurately metering the raw material slices by a metering pump, then spinning by a spinning box and a spinning assembly, cooling by side blowing, oiling by an oil nozzle, eliminating static electricity and increasing tow bundling property, then sequentially passing through a networkable, a first godet roller and a second godet roller, and finally winding and forming to obtain POY2 prepared from PA 6;
(2) one-step stretching deformation:
the balanced POY1 and POY2 pass through a yarn guide tube and a yarn cutter to a first roller, pass through a twist stopper and the yarn cutter to a hot box, are heated and shaped, eliminate stress, are cooled by a cooling plate, pass through a false twister to be twisted and deformed, and pass through a second roller; and then sequentially passing through a networker and an auxiliary roller, oiling by an oil roller to increase the saturation of the tows and eliminate static electricity, and finally winding and forming to obtain the PA56/PA6 bio-based heterochromatic stripe composite elastic nylon yarn.
2. The production method according to claim 1, wherein the POY1 is prepared by: the temperature of each zone of the screw extruder is controlled as follows: between 270 ℃ and 280 ℃; the melting temperature of the melt is controlled between 270 ℃ and 279 ℃; the pressure of the component is controlled between 15 and 18 MPa.
3. The production process according to claim 1, wherein the POY1 and POY2 are prepared by: the wind speed of the cross wind is 0.38-0.55m/s, the wind temperature is 17.5-18.5 ℃, and the rheumatism: 90-95%; the blowing direction of the cross air blower is vertical to the spinneret orifice; the oiling rate is controlled to be 1.6-1.8%.
4. The production method according to claim 1, wherein the POY1 is prepared by: the network pressure is controlled between 0.15 and 0.18 MPa; the speed of the first wire guide roller is 4800-4990 m/min; the speed of the second wire guide roller is 4900-5200 m/min; the stretching ratio is controlled between 1 and 1.2; the winding speed is controlled between 4800 and 5000 m/min.
5. The production method according to claim 1, wherein the POY2 is prepared by: the temperature of each zone of the screw extruder is controlled as follows: 250-256 deg.c; the melting temperature of the melt is controlled between 250 ℃ and 253 ℃; the pressure of the component is controlled between 15 and 17 MPa.
6. The production method according to claim 1, wherein the POY2 is prepared by: the network pressure is controlled between 0.15 and 0.17 MPa; the speed of the first guide wire roller is 4200-; the speed of the second wire guide roller is 4300-; the stretching ratio is controlled between 1 and 1.2; the winding speed is controlled between 4300-.
7. The production method according to claim 1, wherein the fineness of POY1 is controlled to 20-95D, and the number of holes is controlled to 12-96 f; the fineness of the POY2 is controlled to be 20-95D, and the number of pores is controlled to be 12-96 f.
8. The production method as claimed in claim 1, wherein in the step (2), the draw ratio is controlled to 1.2-1.25, the temperature of the hot box is controlled to 165-170 ℃, the speed ratio D/Y of the false twister is controlled to 1.55-1.7, the rotation speed of the oil roller is controlled to 0.6-0.8rpm, and the spinning speed is controlled to 430-460 m/min.
9. The production method according to claim 1, characterized in that in the step (2), the titer of the PA56/PA6 bio-based heterostripe compound elastic nylon yarn is controlled to be 30-150D, and the number of holes is controlled to be 24-192 f.
10. The production method of the composite stretch nylon yarn according to the claim 1, wherein the PA56/PA6 bio-based heterochromatic striped composite stretch nylon yarn comprises 45-55wt% of PA56 and 45-55wt% of PA 6.
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