CN110747526A - Nylon BCF low-crimp fiber and preparation method thereof - Google Patents
Nylon BCF low-crimp fiber and preparation method thereof Download PDFInfo
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- CN110747526A CN110747526A CN201910791513.1A CN201910791513A CN110747526A CN 110747526 A CN110747526 A CN 110747526A CN 201910791513 A CN201910791513 A CN 201910791513A CN 110747526 A CN110747526 A CN 110747526A
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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
- 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
- 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
- D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
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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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- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention discloses a preparation method of nylon BCF low-crimp fiber, which comprises the steps of slicing, melting, extruding, spinning, cooling, oiling, drafting, deforming, cooling, dotting and winding; wherein the temperature of the first drawing roller is 50-68 ℃ and the temperature of the second drawing roller is 170-200 ℃ in the drawing process; and controlling the air pressure of the network device to be (4-6) KG in the process of hitting the network points, and controlling the deformation air pressure to be (4.5-5.5) KG in the deformation process. The preparation method ensures the stability of pressure in the deformation process, ensures the continuous and stable production process, can produce qualified yarns with high strength, high elasticity, low crimp and low network points, can meet the high-end requirement of the market, and realizes the localization of similar products.
Description
Technical Field
The invention belongs to the technical field of spinning, and particularly relates to a nylon BCF low-crimp fiber and a preparation method thereof.
Background
Bulk Continuous Filament (BCF) is a textured Filament obtained by processing a stretched tow by a hot air texturing device. BCF is widely applied to numerous fields of weaving carpets, automobile cushions, decorative fabrics and the like due to three-dimensional crimpability, good hand feeling and high fluffiness. Therefore, the preparation of the bulked yarn has been a technique which has been intensively studied in the field of spinning.
At present, the existing method for preparing the expanded body yarn generally comprises the steps of spinning, drafting, deforming, dotting, network winding and the like, and the expanded body yarn with wide application is prepared by the method. However, when the expansive body silk fiber prepared by the prior art is used, the cold air temperature is unstable during spinning cooling, the deformation temperature is high during deformation, and the drafting effect is poor, so that the strength of the silk bundle is low, the crimpness is high, and the problems of large tension change of the silk bundle, low breaking strength of the yarn, large elongation and the like are presented; the deformation pressure and the network pressure in the production process are unstable, the drafting effect is poor, the crimpness is high, and the market demand cannot be met.
Disclosure of Invention
The invention aims at the technical problems that: the nylon BCF fiber produced in the prior art has high crimpability, the general crimpability is higher than 5.5%, the nylon BCF fiber with high crimpability has large tension change of the tow, low breaking strength of the yarn and large elongation, and can not meet the market requirement and the specific use requirement of customers.
Aiming at the problems, the preparation method of the nylon BCF low-crimp fiber obtained by the research endows BCF nylon 66 and nylon 6 yarns with fineness of 900dtex-2100dtex with special performances of high strength, high resilience, low crimpness, low network points and the like, and can meet the requirements of manufacturing inner core roller brushes of dust collectors for precise electronic instruments, intelligent machine sweeper, high-grade automobile glass sealing wool tops and the like, so that the nylon BCF low-crimp fiber can be better applied to the high-grade technical field.
The invention is realized by the following technical scheme
A preparation method of nylon BCF low-crimp fiber comprises the steps of slicing, melting and extruding, spinning, cooling, oiling, drafting, deforming, cooling, dotting, and winding to obtain the nylon BCF low-crimp fiber;
wherein the drafting temperature is controlled to be 170-200 ℃ in the drafting process, and the drafting multiple is 2.6-3.1; the drafting process conditions are as follows: the speed of the first drawing roller is 620-800 m/min, and the temperature is 50-68 ℃; the second drawing roller speed is 1920-2200 m/min, and the temperature is 170-200 ℃.
According to the preparation method of the nylon BCF low-crimp fiber, cooling is carried out after spinning through cross air blow, the air temperature of the cross air blow is 18-20 ℃, and the air pressure is 420-450 Pa.
According to the preparation method of the nylon BCF low-crimp fiber, the attachment amount of the oiling agent is 0.8-1.3%.
The preparation method of the nylon BCF low-crimp fiber comprises the step of cooling the drafted fiber to 20-25 ℃.
According to the preparation method of the nylon BCF low-crimp fiber, in the process of beating the network points, the air pressure of a network device is controlled to be (4-6) KG.
According to the preparation method of the nylon BCF low-crimp fiber, the speed of a winding machine in the winding process is 1500-1898 m/min.
The preparation method of the nylon BCF low-crimp fiber is characterized in that the temperature of a texturing machine is 130-170 ℃ and the pressure of texturing air is (4.5-5.5) KG in the texturing process.
The nylon BCF low-crimp fiber prepared by the preparation method.
The titer of the nylon BCF low-crimp fiber is 900dtex to 2100dtex, and the crimp degree is 1.98 to 5.0 percent. The reduction of the crimpness reaches 64 percent.
Compared with the prior art, the invention has the following positive beneficial effects
According to the invention, the temperature and the air pressure are kept in a stable state and do not fluctuate up and down by controlling the temperature and the air pressure in the cooling process, the low orientation and the low crystallization of the nascent fiber are ensured after stabilization, the later-stage stretching is facilitated, the linear density of the fiber is uniform, and the profile degree is kept better.
In the preparation process of the BCF low-crimp fiber, the control of the drafting temperature is very important and is generally controlled above the glass transition temperature, if the filament bundle jumps on a drafting roller during higher drafting, the filament breakage is caused, the yarn evenness is high, and the color difference exists; if the amount is too low, the drawing tends to be uneven and undrawn yarn may appear, and the color difference may occur in the dyeing of the fiber. Finally, the prepared BCF low-crimp fiber does not meet the requirements, the fiber is uniformly drawn by controlling the drawing temperature, the consistency and uniformity of the fiber are ensured, and good strength, elongation and crimp indexes can be obtained;
in addition, in the process, the control stability of the deformation pressure is the key for ensuring the fiber bulking deformation effect, the degree of crimpness is suddenly high and suddenly low when the air pressure is unstable, and the fiber breakage rate is high due to the poor deformation effect. When the air pressure is high, the curling degree of the fiber is high, and when the air pressure is reduced, the curling degree of the fiber is synchronously reduced.
The preparation method ensures the stability of pressure in the deformation process, ensures the continuous and stable production process, can produce qualified yarns with high strength, high elasticity, low crimp and low network points, can meet the high-end requirement of the market, and realizes the localization of similar products.
Drawings
FIG. 1 is a schematic side view of the apparatus for processing the spun yarn of the present invention (draw texturing machine);
the symbols in the drawings indicate that: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 and 13 respectively represent a compressed air station, a two-roller, a texturing machine, a cooling drum, a roller, a winding machine, a networker air supply pipe, a texturing machine air supply pipe, a winding machine air supply pipe, a networker air supply pressure regulating valve, a texturing machine air supply pressure regulating valve and a compressed air supply distribution box;
FIG. 2 is a schematic view of a pressure regulating valve;
FIG. 3 is a schematic view showing the connection between the pressure regulating valve and the air supply pipe and the connection between the pressure regulating valve and the anti-drop thread.
Detailed Description
The present invention will be described in detail with reference to the following embodiments for easy understanding of the technical solutions of the present invention, but the present invention is not limited to the scope of the present invention.
The invention provides a preparation method of nylon BCF low-crimp fiber, which comprises the following steps:
(1) spinning: the dried nylon slices are melted and extruded by a screw extruder, the melt reaches a spinning box and is metered by a metering pump, the melt is mixed, heated and filtered in a spinning assembly, and the melt is ejected by a spinneret plate to form tows;
(2) cooling: carrying out side air blowing cooling on the tows obtained in the step (1) in a cold air chamber; in the process, the temperature of cold air is controlled to be 18-20 ℃, the air pressure is controlled to be 420-450 Pa, and the air speed is controlled to be (0.5-0.55) m/s; in the process, the temperature and the pressure of the cold air are accurately controlled through an automatic control program, the temperature and the pressure of the cold air are prevented from fluctuating up and down, so that the yarn is prevented from being greatly influenced, the good and stable yarn effect can be better ensured, the low orientation and the low crystallization of the nascent fiber are ensured, the later-stage drawing is facilitated, the linear density of the fiber is uniform, and the profile tolerance is kept better;
drawing the cooled and cooled tows into a device shown in figure 1 for subsequent treatment, wherein the method specifically comprises the following steps:
(3) oiling: oiling the cooled and cooled tows through an oiling agent nozzle in the device, and ensuring that the attachment amount of an oiling agent is 0.8-1.3%;
(4) drafting: drafting the oiled tows at 170-200 ℃ with a draft multiple of 2.6-3.1; the drafting process conditions are as follows: the speed of the first drawing roller is 620-800 m/min, and the temperature is 50-68 ℃; the speed of the second drawing roller is 1920-2200 m/min, and the temperature is 170-200 ℃;
the control of the drafting process can better control the crimpness of the obtained tows, ensure the consistency and uniformity of the fibers and obtain good indexes of strength, elongation and crimp;
(5) heating and deforming: heating and deforming the drafted filament bundle in a deforming machine, wherein the heating temperature of the deforming machine is controlled to be 130-170 ℃, and the pressure of deforming air is (4.5-5.5) KG; the process accurately controls the pressure of the deformation machine, so that the finally obtained BCF fiber has lower crimpness, the control stability of the deformation pressure is the key for ensuring the fiber bulking deformation effect, the crimpness is suddenly high and suddenly low when the air pressure is unstable, and the fiber breakage rate is higher due to the poor deformation effect.
(6) Cooling and shaping: cooling and shaping the deformed filament bundle in a cooling drum to 20-25 ℃;
(7) and (3) network point printing: the cooled tows enter a networker to form a network point through the three rollers; in the process, the number of network points can be reduced by controlling the source pressure of the network device, and the later-stage use is not influenced, so that the requirement of a high-end market is met;
in the prior art, air pressure control is the adjustment of a single instrument of an air-compression station, when network air pressure is adjusted downwards, the air pressure values of all spinning positions are reduced and can change along with the fluctuation of compressed air pressure, the adjustment of individual spindle positions cannot be realized, network points of various types required by each client have different requirements, unqualified products are inevitably produced, and the test production cost is increased to waste raw materials; in addition, after the compressed air is distributed by the compressed air source distribution box, more network points are ejected by 6KG air pressure, and the use requirements of customers cannot be met. According to the invention, through the control of the air source pressure regulating valve, the flexible adjustment of the air pressure of the single ingot position network is realized, and the adjustment is carried out until 24 network points are formed by 4KG, so that the requirement of customers is completely met, the test cost is greatly reduced, and the economic benefit is obvious.
(8) Winding: and finally hanging the tows after the net point is formed into a bobbin by a winding machine, and winding the bobbin into a bobbin at the speed of 1500-1898 m/min. And (5) obtaining the nylon BCF low-crimp fiber after winding.
The invention also provides a device for preparing the nylon BCF low-crimp fiber, which is used for processing the spun tows to prepare the nylon BCF low-crimp fiber as shown in figure 1.
In the device, a gas supply pressure regulating valve of the texturing machine is arranged on a gas supply pipeline of the texturing machine, and the valve can accurately control the pressure of the texturing machine, so that the pressure borne by the filament bundle is better controlled when the filament bundle is heated and deformed;
in the device, be equipped with network ware air supply air-vent valve on network ware air supply line, the pressure that the silk bundle received when this valve can better control the net point for the silk bundle also is not influenced under the less condition of net point, can satisfy the demand in high-end market.
Further, the installation of the air source pressure regulating valve of the texturing machine on the air supply pipeline of the texturing machine is as follows: the air source pressure regulating valve 12 of the deformation machine is arranged 50cm below the outlet of the compressed air source distribution box 13, two joints of the pressure regulating valve are respectively inserted into deformation pressure air paths, and the joints at two sides of the pressure regulating valve are anti-drop screw threads, as shown in fig. 3. And is fixed tightly by a throat hoop.
When the pressure is adjusted, the knob is pulled up and then rotated to the required pressure value, and the rotating knob is pressed down to be positioned.
Further, the installation of the air source pressure regulating valve of the network device on the air supply pipeline of the network device is as follows: the air source pressure regulating valve 11 of the network device is arranged at the position 60cm below the outlet of the compressed air source distribution box 13, two joints of the pressure regulating valve are respectively inserted into the deformation pressure air path, and the joints at two sides of the pressure regulating valve are anti-drop screw threads, as shown in figure 3. And is fixed tightly by a throat hoop.
When the pressure is adjusted, the knob is pulled up and then rotated to the required pressure value, and the rotating knob is pressed down to be positioned.
The pressure regulating valve described above is a pressure regulating valve that a person skilled in the art can operate. As shown in fig. 2.
The invention also provides the nylon BCF low-crimp fiber prepared by the preparation method and the device, wherein the fineness of the fiber is 900dtex to 2100dtex, the strength is 2.72 to 3.56CN/dtex, the elongation is 41.91 to 53.97 percent, and the crimp degree is 1.98 to 5.00 percent. The crimpness is obviously reduced, and the strength is obviously improved; the number of network points per meter can be reduced without any effect on the resulting fiber.
The present invention is described in more detail below with reference to specific examples, but the present invention is not limited to the following examples.
Example 1
A preparation method of nylon BCF low-crimp fiber comprises the following steps:
(1) spinning:
the dried nylon slices are melted and extruded by a screw extruder, the melt reaches a spinning box and is metered by a metering pump, the melt is mixed, heated and filtered in a spinning assembly, and the melt is ejected by a spinneret plate to form tows;
(2) cooling:
carrying out side air blowing cooling on the tows obtained in the step (1) in a cold air chamber; in the process, the temperature of cold air is controlled to be 20 ℃, the air pressure is 450Pa, and the air speed is 0.5 m/s; in the process, the temperature and the pressure of the cold air are accurately controlled through an automatic control program, the temperature and the pressure of the cold air are prevented from fluctuating up and down, so that the yarn is prevented from being greatly influenced, the good and stable yarn effect can be better ensured, the low orientation and the low crystallization of the nascent fiber are ensured, the later-stage drawing is facilitated, the linear density of the fiber is uniform, and the profile tolerance is kept better;
drawing the cooled and cooled tows into a device shown in figure 1 for subsequent treatment, wherein the method specifically comprises the following steps:
(3) oiling:
oiling the cooled and cooled tows through an oiling agent nozzle in the device, and ensuring that the attachment amount of an oiling agent is 0.8%;
(4) drafting:
drafting the oiled tows by a drafting multiple of 3.1; the drafting process conditions are as follows: the speed of the first drafting roller is 620 m/min, and the temperature is 50 ℃; the speed of the second drawing roller is 1920 m/min, and the temperature is 170 ℃;
(5) heating and deforming:
the drafted tows are placed in a texturing machine for heating and texturing, the heating temperature of the texturing machine is controlled to be 170 ℃, and the pressure of texturing air is 5.5 KG; the process accurately controls the pressure of the deforming machine, so that the finally obtained BCF fiber has lower crimpness;
(6) cooling and shaping:
the filament bundle deformed in the step (5) is placed on a cooling drum for cooling and shaping, and is cooled to 25 ℃;
(7) and (3) network point printing:
the cooled tows in the step (6) enter a net device through three rollers to form a net point, and the net air pressure is 6 KG;
(8) winding:
and (4) finally hanging the tows subjected to the net point punching in the step (7) into a winding machine to be wound into a bobbin, wherein the speed of the winding machine is 1500 m/min. And (5) obtaining the nylon BCF low-crimp fiber after winding. The individual properties of the obtained nylon BCF low-crimp fiber are shown in the following table 1;
TABLE 1 Properties of Nylon BCF Low crimp fibers as shown in example 1
| Item | Fineness of fiber | High strength | Elongation of | Crimping | Network point |
| Unit of | DTEX | CN/DTEX | ％ | ％ | An |
| Numerical value | 900 | 2.72 | 53.97 | 5.0 | 40 |
Example 2
A preparation method of nylon BCF low-crimp fiber comprises the following steps:
(1) spinning:
the dried nylon slices are melted and extruded by a screw extruder, the melt reaches a spinning box and is metered by a metering pump, the melt is mixed, heated and filtered in a spinning assembly, and the melt is ejected by a spinneret plate to form tows;
(2) cooling:
carrying out side air blowing cooling on the tows obtained in the step (1) in a cold air chamber; in the process, the temperature of cold air is controlled to be 18 ℃, the air pressure is controlled to be 420Pa, and the air speed is controlled to be 0.55 m/s;
drawing the cooled and cooled tows into a device shown in figure 1 for subsequent treatment, wherein the method specifically comprises the following steps:
(3) oiling:
oiling the cooled and cooled tows through an oiling agent nozzle in the device, and ensuring that the attachment amount of an oiling agent is 1.0%;
(4) drafting:
drafting the oiled tows by a drafting multiple of 2.75; the drafting process conditions are as follows: the speed of the first drawing roller is 800 m/min, and the temperature is 60 ℃; the speed of the second drawing roller is 2200 m/min, and the temperature is 200 ℃;
(5) heating and deforming:
the drafted tows are placed in a texturing machine for heating and texturing, the heating temperature of the texturing machine is controlled to be 130 ℃, and the pressure of the texturing air is 4.5 KG;
(6) cooling and shaping:
the filament bundle deformed in the step (5) is placed on a cooling drum for cooling and shaping, and is cooled to 20 ℃;
(7) and (3) network point printing:
the cooled tows in the step (6) enter a net device through three rollers to form a net point, and the net pressure is 4 KG;
(8) winding:
and (4) finally hanging the tows subjected to the net point punching in the step (7) into a winder to be wound into a bobbin, wherein the speed of the winder is 1898 m/min. And (5) obtaining the nylon BCF low-crimp fiber after winding. The individual properties of the obtained nylon BCF low crimp fiber are shown in table 2 below;
table 2 properties of nylon BCF low crimp fibers as shown in example 2
| Item | Fineness of fiber | High strength | Elongation of | Crimping | Network point |
| Unit of | DTEX | CN/DTEX | ％ | ％ | An |
| Numerical value | 902 | 3.56 | 41.91 | 1.98 | 24 |
Example 3
A preparation method of nylon BCF low-crimp fiber comprises the following steps:
(1) spinning:
the dried nylon slices are melted and extruded by a screw extruder, the melt reaches a spinning box and is metered by a metering pump, the melt is mixed, heated and filtered in a spinning assembly, and the melt is ejected by a spinneret plate to form tows;
(2) cooling:
carrying out side air blowing cooling on the tows obtained in the step (1) in a cold air chamber; in the process, the temperature of cold air is controlled to be 19 ℃, the air pressure is 435Pa, and the air speed is 0.5 m/s;
drawing the cooled and cooled tows into a device shown in figure 1 for subsequent treatment, wherein the method specifically comprises the following steps:
(3) oiling:
oiling the cooled and cooled tows through an oiling agent nozzle in the device, and ensuring that the attachment amount of an oiling agent is 1.3%;
(4) drafting:
drafting the oiled tows by a drafting multiple of 2.6; the drafting process conditions are as follows: the speed of the first drawing roller is 748 m/min, and the temperature is 68 ℃; the speed of the second drafting roller is 1945 m/min, and the temperature is 180 ℃;
(5) heating and deforming:
the drafted tows are placed in a texturing machine for heating and texturing, the heating temperature of the texturing machine is controlled to be 155 ℃, and the pressure of texturing air is controlled to be 5.1 KG;
(6) cooling and shaping:
the filament bundle deformed in the step (5) is placed on a cooling drum for cooling and shaping, and is cooled to 23 ℃;
(7) and (3) network point printing:
the cooled tows in the step (6) enter a net device through three rollers to form a net point, and the net pressure is 4.4 KG;
(8) winding:
and (4) finally hanging the tows subjected to the net point punching in the step (7) into a winding machine to be wound into a bobbin, wherein the speed of the winding machine is 1730 m/min. And (5) obtaining the nylon BCF low-crimp fiber after winding. The individual properties of the obtained nylon BCF low crimp fiber are shown in table 3 below;
TABLE 3 Properties of Nylon BCF Low crimp fibers as shown in example 3
| Item | Fineness of fiber | High strength | Elongation of | Crimping | NetworkDot |
| Unit of | DTEX | CN/DTEX | ％ | ％ | An |
| Numerical value | 895 | 3.14 | 43.5 | 2.52 | 31 |
Therefore, the invention ensures continuous and stable production by improving and stabilizing the cold air temperature and the cold air pressure, adjusting the drafting temperature, the temperature of the texturing machine and the pressure of the texturing machine, adjusting the drafting multiple of the drafting roller and adjusting the network pressure, produces the qualified nylon yarn with high strength, high elasticity, low curl and low network point, and meets the requirements of high-end customers.
Claims (9)
1. A preparation method of nylon BCF low-crimp fiber is characterized in that the nylon BCF low-crimp fiber is obtained by carrying out melt extrusion, spinning, cooling, oiling, drafting, deforming, cooling, netting point beating and winding on a slice;
wherein the drafting temperature is controlled to be 170-200 ℃ in the drafting process, and the drafting multiple is 2.6-3.1; the drafting process conditions are as follows: the speed of the first drawing roller is 620-800 m/min, and the temperature is 50-68 ℃; the second drawing roller speed is 1920-2200 m/min, and the temperature is 170-200 ℃.
2. The preparation method of the nylon BCF low-crimp fiber according to claim 1, wherein the cooling is performed by cross air blowing after spinning, the air temperature of the cross air blowing is 18-20 ℃, and the air pressure is 420-450 Pa.
3. The method for preparing nylon BCF low-crimp fiber according to claim 1, wherein the oiling oil agent is attached in an amount of 0.8-1.3%.
4. The method for preparing nylon BCF low crimp fiber according to claim 1, wherein the cooling is to cool the drafted fiber to 20-25 ℃.
5. The method for preparing nylon BCF low-crimp fiber according to claim 1, wherein in the process of network dotting, the air pressure of a network controller is controlled to be (4-6) KG.
6. The method for preparing nylon BCF low-crimp fiber according to claim 1, wherein the speed of a winder during winding is 1500-1898 m/min.
7. The method for preparing nylon BCF low-crimp fiber according to any one of claims 1 to 6, wherein the temperature of a texturing machine in the texturing process is 130 to 170 ℃, and the pressure of the texturing air is (4.5 to 5.5) KG.
8. Nylon BCF low-crimp fiber prepared by the preparation method of claims 1-7.
9. The nylon BCF low crimp fiber according to claim 8, wherein the fiber has a fineness of 900dtex to 2100dtex and a crimp degree of 1.98 to 5.00%.
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| CN112746363A (en) * | 2020-12-28 | 2021-05-04 | 江苏恒力化纤股份有限公司 | Method for improving POY (pre-oriented yarn) tail passing rate |
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| CN109853072A (en) * | 2018-11-22 | 2019-06-07 | 常州灵达特种纤维有限公司 | A kind of preparation method of modification by copolymerization anti-pollution terylene bulk filament |
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