CN108149336B - Preparation method of chinlon 6 heterochromatic fat and lean fibers - Google Patents

Preparation method of chinlon 6 heterochromatic fat and lean fibers Download PDF

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CN108149336B
CN108149336B CN201711391264.4A CN201711391264A CN108149336B CN 108149336 B CN108149336 B CN 108149336B CN 201711391264 A CN201711391264 A CN 201711391264A CN 108149336 B CN108149336 B CN 108149336B
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working cavity
fiber
melt
meshing working
reference volume
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CN108149336A (en
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张守运
朱文建
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YIWU HUADING NYLON CO LTD
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YIWU HUADING NYLON CO LTD
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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
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • 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
    • 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
    • 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
    • D01D7/00—Collecting the newly-spun products

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  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention discloses a preparation method of nylon 6 heterochromatic fat-thin fibers, which improves the volume change of a gear meshing working cavity of a spinning metering pump, and the quality of melt metered and extruded by the metering pump in unit time is different, so that the linear density of the fibers is different, and a thick-thin section structure of the fibers is formed. The invention can produce the polyamide 6 heterochromatic fat-thin fiber with thick-thin section structure of fiber strand silk, and the finished fabric can be dyed with deep and light heterochromatic stripes by a dye and has better air permeability.

Description

Preparation method of chinlon 6 heterochromatic fat and lean fibers
Technical Field
The invention relates to a preparation method of chinlon 6, in particular to a preparation method of chinlon 6 heterochromatic fat-lean fiber.
Background
Along with the improvement of living standard, the increase of leisure time, people have proposed higher requirement to the quality of dress surface fabric, and fashion, healthy, comfortable leisure's dress is more and more favored by consumer, and dress surface fabric forward high-grade, diversified, the functional orientation develops. As one of four large synthetic fibers, nylon-6 fiber is widely used in the fields of textile and clothing and other non-woven fabrics due to its excellent physical and chemical properties.
In recent years, with the rapid development of nylon production technology and equipment, the capacity of nylon fibers is rapidly improved, the industry enters a supply and demand adjustment stage with supply larger than demand, the homogenization competition of conventional products is intensified, the profit space is sharply reduced, most products are at the defect edge, high-performance and differential fibers are in short supply and demand, the dependence degree on import is high, and the industry urgently needs product technology upgrading and transformation.
Disclosure of Invention
The invention aims to provide a preparation method of the chinlon 6 heterochromatic fat-thin fiber, which can produce the chinlon 6 heterochromatic fat-thin fiber with a thick-thin section structure, and the finished fabric can be dyed with deep and light heterochromatic stripes by a dye and has better air permeability.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of chinlon 6 heterochromatic fat and lean fibers comprises the following steps:
(1) feeding material
Putting the fiber-grade nylon-6 slices into a bin filled with nitrogen;
(2) melt spinning
Inputting the nylon 6 slices protected by nitrogen in a storage bin into a screw extruder to be extruded and melted into a melt, conveying the melt to a melt pipeline, metering and pressurizing the melt through a spinning metering pump to enable the melt to enter a spinning assembly for filtering and mixing, and then extruding the melt through a spinning nozzle to form melt trickle; the spinning metering pump carries out uneven metering, and the volume change of the gear meshing working cavity is set as follows:
s1: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are more than 10 percent of the reference volume of the meshing working cavity;
s2: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are greater than 20% of the reference volume of the meshing working cavity;
s3: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 10% of the reference volume of the meshing working cavity;
s4: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 20 percent of the reference volume of the meshing working cavity;
S1-S4 are sequentially repeated;
the invention improves the volume change of the gear meshing working cavity of the spinning metering pump, and the quality of the melt metered and extruded by the metering pump in unit time is different, so that the linear density of the fiber is different, and a thick and thin section structure of the fiber is formed. In order to keep the thick and thin section structure of the fiber and obviously compare the dyeing difference of the thick and thin sections in the process of cooling and forming the fiber by the melt, the volume change rule of the gear meshing working cavity is set to be S1-S4 specific volume gradient arrangement.
(3) Cooling and forming
Cooling the melt trickle by cooling air through an air blowing window to solidify the melt trickle into nascent fiber;
(4) oiling-winding or oiling-stretch-heat-setting-winding
Oiling-winding: oiling the nascent fiber to form a uniform oil film on the surface of the fiber, and winding the oiled fiber to form polyamide-6 heterochromatic fat-thin fibers POY and HOY;
oiling, stretching and heat setting, and winding: oiling the nascent fiber to form a uniform oil film on the surface of the fiber, preheating the oiled fiber, stretching, heat setting and winding to form the polyamide 6 heterochromatic fat-thin fiber FDY.
In the process of spinning the nylon-6 fiber, the change of the supply amount of a spinning melt is realized by modifying and designing a spinning metering pump, the condition of forming cooling air by modifying and cooling the spinning is improved, the fiber strand silk is promoted to be rapidly cooled, and the structure of the strand silk of a finished fiber product keeps uneven fiber sections in thickness after the post-production process is processed through the targeted improvement of parameters such as spinning speed, a spinning nozzle stretching ratio, stretching heat setting and the like, otherwise, the structure of the uneven fiber sections in thickness is not obvious and the design effect cannot be achieved only by changing the spinning metering pump and not performing targeted adjustment on other conditions.
The finished fiber fabric has the advantages that deep and shallow stripes with different lengths are dyed by one dye, the appearance is attractive, the fabric has good air permeability and wearing comfort due to the fact that the fiber has a thick and thin section structure, the fabric is widely applied to the fields of children clothes, underwear, sofa cloth, decorative cloth and the like, and the finished fiber fabric has good market prospect and economic and social benefits.
Preferably, in step (2), the spinning speed is 3000-3500m/min, and the spinneret draw ratio is 205-260. The control of the stretch ratio of the spinneret to 205-260 is beneficial to keeping the structure of the fiber thickness section unchanged.
Preferably, in the step (3), the relative humidity of the cooling air is 95% or more, the temperature is 16 to 17 ℃, and the wind speed is 0.6 to 0.7 m/s.
Preferably, the height of the blowing area of the blowing window is set to 1.55-1.6 m. The existing blowing air window comprises a blowing area at the lower part and a calm area at the upper part, and in order to keep the difference of the melt quality measured and extruded in the cooling fiber forming process, and the fiber quality still keeps the difference after the cooling fiber forming, the invention changes the structure of the cooling blowing air window, increases the height of the blowing area, and reduces the height of the calm area or cancels the calm area. The height of the existing blowing area is 1.5m, the height of the airless area is 10cm, and the height of the blowing area is set to be 1.55-1.6m, so that the airless area can be partially or completely replaced.
Preferably, in step (4), the preheating temperature is 120. + -. 2 ℃.
Preferably, in the step (4), the temperature for stretching and heat-setting is 150-175 ℃, and the stretching ratio is 1.05-1.12.
Preferably, the winding speed for forming the chinlon 6 heterochromatic fat-thin fiber POY is 4000-; the winding speed for forming the nylon 6 heterochromatic fat-thin fiber FDY is 4200 and 4800 m/min.
Preferably, the oiling is carried out by a nozzle, the mass concentration of the oiling agent is 8-15%, and the oiling rate is 0.6-2%.
The invention has the beneficial effects that: according to the fiber thickness section structure, the finished fabric can be dyed with deep and light different color stripes by one dye, has good air permeability, has different dyeing and color and environmental protection significance for reducing environmental pollution, has good moisture-permeable and air-permeable wearing comfort and attractive appearance of the stripes, can greatly improve the application space and wearing comfort of the chinlon 6, and has remarkable economic and social benefits.
Drawings
FIG. 1 is a view of the structure of a metering gear of a spinning metering pump.
Fig. 2 is a schematic view of a conventional blowing louver.
FIG. 3 is a graph of the effect of dyeing on a finished fabric made from fibers produced in accordance with the present invention.
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.
As shown in figure 1, the uneven metering of the spinning metering pump is realized by changing the metering gear structure of the metering pump, the external meshing edge structure of A, B gears is kept unchanged, the normal meshing operation state of the 1 point of the gear A and the 2 point of the gear B as well as the 2 point of the gear A and the 1 point of the gear B is unchanged, the normal metering function is ensured, the design of bottom contour lines 4 of the two gears is changed, the contour lines 4 with different curvatures can ensure that the volumes of single meshing working cavities 3 of the metering pump are different, so that the melt quality metered and extruded by the metering pump in unit time is different, the linear density of fibers is different, and the thick and thin section structure of the fibers is formed.
As shown in fig. 2, the conventional blowing louver includes a lower blowing zone 5 and an upper calm zone 6.
The method for calculating the reference volume of the meshing working cavity comprises the following steps: and the revolution displacement value of the spinning metering pump is divided by the number of teeth of a single metering gear, and if the revolution displacement value of the metering pump is 600 CC/revolution and the number of the teeth of the single metering gear is 20, the reference volume of the meshing working cavity is =600 CC/20 =30 CC.
Example 1:
a preparation method of chinlon 6 heterochromatic fat and lean fibers comprises the following steps:
(1) feeding material
Putting the fiber-grade chinlon 6 slices (the relative viscosity is 2.4-2.6, and the water content is less than or equal to 50 ppm) into a bin filled with nitrogen.
(2) Melt spinning
Inputting the nylon 6 slices protected by nitrogen in a storage bin into a screw extruder to be extruded and melted into a melt, conveying the melt to a melt pipeline, metering and pressurizing the melt through a spinning metering pump to enable the melt to enter a spinning assembly for filtering and mixing, and then extruding the melt through a spinning nozzle to form melt trickle; the spinning metering pump carries out uneven metering, and the volume change of the gear meshing working cavity is set as follows:
s1: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are more than 10 percent of the reference volume of the meshing working cavity;
s2: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are greater than 20% of the reference volume of the meshing working cavity;
s3: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 10% of the reference volume of the meshing working cavity;
s4: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 20 percent of the reference volume of the meshing working cavity;
S1-S4 are sequentially repeated;
a spinneret of 70D/48F size was used, the spinning speed was 3500m/min and the spinneret draw ratio was 205.
(3) Cooling and forming
Cooling the melt trickle by cooling air through an air blowing window to solidify the melt trickle into nascent fiber; the relative humidity of the cooling air is more than 95%, the temperature is 16 ℃, and the wind speed is 0.6 m/s. The structure of the blowing air window is changed, the height of the blowing area is increased, the blowing area partially replaces a windless area, transformation is achieved under the condition that the overall height of the existing blowing air window is not changed, and the height of the blowing area is set to be 1.55m in the embodiment.
(4) Oiling-stretching heat setting-winding
Oiling the nascent fiber to form a uniform oil film on the surface of the fiber, preheating the oiled fiber (the preheating temperature is 120 +/-2 ℃), stretching and heat-setting, wherein the stretching and heat-setting temperature is 150 ℃, the stretching multiple is 1.05, and after winding, forming the polyamide-6 heterochromatic fat-lean fiber FDY, wherein the winding speed for forming the polyamide-6 heterochromatic fat-lean fiber FDY is 4200 m/min. The oiling is carried out by a nozzle, the mass concentration of the oiling agent (sold in the market) is 8%, and the oiling rate is 0.6%.
Example 2:
a preparation method of chinlon 6 heterochromatic fat and lean fibers comprises the following steps:
(1) feeding material
Putting the fiber-grade chinlon 6 slices (the relative viscosity is 2.4-2.6, and the water content is less than or equal to 50 ppm) into a bin filled with nitrogen.
(2) Melt spinning
Inputting the nylon 6 slices protected by nitrogen in a storage bin into a screw extruder to be extruded and melted into a melt, conveying the melt to a melt pipeline, metering and pressurizing the melt through a spinning metering pump to enable the melt to enter a spinning assembly for filtering and mixing, and then extruding the melt through a spinning nozzle to form melt trickle; the spinning metering pump carries out uneven metering, and the volume change of the gear meshing working cavity is set as follows:
s1: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are more than 10 percent of the reference volume of the meshing working cavity;
s2: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are greater than 20% of the reference volume of the meshing working cavity;
s3: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 10% of the reference volume of the meshing working cavity;
s4: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 20 percent of the reference volume of the meshing working cavity;
S1-S4 are sequentially repeated;
A40D/36F spinneret was used for production, the spinning speed was 3000m/min and the spinneret draw ratio was 260.
(3) Cooling and forming
Cooling the melt trickle by cooling air through an air blowing window to solidify the melt trickle into nascent fiber; the relative humidity of the cooling air is more than 95%, the temperature is 17 ℃, and the wind speed is 0.7 m/s. The structure of the blowing air window is changed, the height of the blowing area is increased, the blowing area is enabled to completely replace a windless area, transformation is achieved under the condition that the overall height of the existing blowing air window is not changed, and the height of the blowing area is set to be 1.6m in the embodiment.
(4) Oiling-stretching heat setting-winding
Oiling the nascent fiber to form a uniform oil film on the surface of the fiber, preheating the oiled fiber (the preheating temperature is 120 +/-2 ℃), stretching and heat-setting, wherein the stretching and heat-setting temperature is 175 ℃, the stretching multiple is 1.12, and after winding, forming the polyamide 6 heterochromatic fat-lean fiber FDY, wherein the winding speed for forming the polyamide 6 heterochromatic fat-lean fiber FDY is 4800 m/min. The oiling is carried out by a nozzle, the mass concentration of the oiling agent is 15%, and the oiling rate is 2%.
Example 3:
a preparation method of chinlon 6 heterochromatic fat and lean fibers comprises the following steps:
(1) feeding material
Putting the fiber-grade chinlon 6 slices (the relative viscosity is 2.4-2.6, and the water content is less than or equal to 50 ppm) into a bin filled with nitrogen.
(2) Melt spinning
Inputting the nylon 6 slices protected by nitrogen in a storage bin into a screw extruder to be extruded and melted into a melt, conveying the melt to a melt pipeline, metering and pressurizing the melt through a spinning metering pump to enable the melt to enter a spinning assembly for filtering and mixing, and then extruding the melt through a spinning nozzle to form melt trickle; the spinning metering pump carries out uneven metering, and the volume change of the gear meshing working cavity is set as follows:
s1: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are more than 10 percent of the reference volume of the meshing working cavity;
s2: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are greater than 20% of the reference volume of the meshing working cavity;
s3: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 10% of the reference volume of the meshing working cavity;
s4: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 20 percent of the reference volume of the meshing working cavity;
S1-S4 are sequentially repeated;
A40D/36F spinneret for production was used, the spinning speed was 3200m/min, and the spinneret draw ratio was 232.
(3) Cooling and forming
Cooling the melt trickle by cooling air through an air blowing window to solidify the melt trickle into nascent fiber; the relative humidity of the cooling air is more than 95%, the temperature is 16-17 ℃, and the wind speed is 0.6-0.7 m/s. The structure of the blowing air window is changed, the height of the blowing area is increased, the blowing area partially or completely replaces a windless area, transformation is achieved under the condition that the overall height of the existing blowing air window is not changed, and the height of the blowing area is set to be 1.55-1.6m in the embodiment.
(4) Oiling-winding
Oiling the nascent fiber to form a uniform oil film on the surface of the fiber, and winding the oiled fiber to form polyamide-6 heterochromatic fat-thin fibers POY and HOY; the winding speed for forming the nylon 6 heterochromatic fat-thin fiber POY is 4000-one 4300m/min, and the winding speed for forming the nylon 6 heterochromatic fat-thin fiber HOY is 4300-one 4500 m/min. The oiling is carried out by a nozzle, the mass concentration of the oiling agent is 8-15%, and the oiling rate is 0.6-2%.
FIG. 3 is a diagram showing the dyeing effect of the finished fabric made of the fiber produced by the present invention, the fabric made of the fiber of the present invention can be dyed with a dye to obtain the deep and light stripes, and the color difference of the deep and light of the dyed fabric can reach 1-2 grade (gray card standard).
The fiber has the characteristics of good air permeability and good wearing comfort due to the thick and thin section structure, and the fiber test result is as follows: wicking height greater than 709cm, air permeability: the temperature is 20 ℃, the relative humidity is 65 percent, and the test area is 20cm2And the pressure difference is less than 50PA, so that the air permeability of the invention is improved by 20-30% compared with the prior art.
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 (3)

1. A preparation method of chinlon 6 heterochromatic fat and lean fibers is characterized by comprising the following steps:
(1) feeding material
Putting the fiber-grade nylon-6 slices into a bin filled with nitrogen;
(2) melt spinning
Inputting the nylon 6 slices protected by nitrogen in a storage bin into a screw extruder to be extruded and melted into a melt, conveying the melt to a melt pipeline, metering and pressurizing the melt through a spinning metering pump to enable the melt to enter a spinning assembly for filtering and mixing, and then extruding the melt through a spinning nozzle to form melt trickle; the spinning metering pump carries out uneven metering, and the volume change of the gear meshing working cavity is set as follows:
s1: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are more than 10 percent of the reference volume of the meshing working cavity;
s2: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are greater than 20% of the reference volume of the meshing working cavity;
s3: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 10% of the reference volume of the meshing working cavity;
s4: the volume of the meshing working cavity, the reference volume of the meshing working cavity and the reference volume of the meshing working cavity are less than 20 percent of the reference volume of the meshing working cavity;
S1-S4 are sequentially repeated;
(3) cooling and forming
Cooling the melt trickle by cooling air through an air blowing window to solidify the melt trickle into nascent fiber;
(4) oiling-winding or oiling-stretch-heat-setting-winding
Oiling-winding: oiling the nascent fiber to form a uniform oil film on the surface of the fiber, and winding the oiled fiber to form polyamide-6 heterochromatic fat-thin fibers POY and HOY;
oiling, stretching and heat setting, and winding: oiling the nascent fiber to form a uniform oil film on the surface of the fiber, preheating the oiled fiber, stretching, heat-setting and winding to form the polyamide 6 heterochromatic fat-thin fiber FDY;
in the step (2), the spinning speed is 3000-3500m/min, and the stretch ratio of a spinneret is 205-260; in the step (3), the relative humidity of the cooling air is more than 95%, the temperature is 16-17 ℃, and the wind speed is 0.6-0.7 m/s; the height of the blowing area of the blowing window is set to be 1.55-1.6 m;
in the step (4), the preheating temperature is 120 +/-2 ℃;
in the step (4), the temperature of the stretching and heat setting is 150-175 ℃, and the stretching ratio is 1.05-1.12.
2. The method as claimed in claim 1, wherein the POY is formed at 4000-4300m/min, and the HOY is formed at 4300-4500 m/min; the winding speed for forming the nylon 6 heterochromatic fat-thin fiber FDY is 4200 and 4800 m/min.
3. The preparation method according to claim 1, wherein the oiling is carried out by a nozzle, the mass concentration of the oiling agent is 8-15%, and the oiling rate is 0.6-2%.
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CN102704096A (en) * 2011-10-30 2012-10-03 张守运 Multicolor terylene fat and thin fiber filament produced in variable speed by metering pump and preparation method thereof
CN102995158A (en) * 2012-11-06 2013-03-27 义乌华鼎锦纶股份有限公司 Photobiotin chinlon 6 fiber and preparation method thereof
CN106435781A (en) * 2016-08-31 2017-02-22 义乌华鼎锦纶股份有限公司 Moisture-absorption breathable linen chinlon type fiber and preparing method thereof

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