CN111041575A - High-moisture-conductivity polyester fiber and preparation method thereof - Google Patents

High-moisture-conductivity polyester fiber and preparation method thereof Download PDF

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Publication number
CN111041575A
CN111041575A CN201911408632.0A CN201911408632A CN111041575A CN 111041575 A CN111041575 A CN 111041575A CN 201911408632 A CN201911408632 A CN 201911408632A CN 111041575 A CN111041575 A CN 111041575A
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polyester fiber
oblique line
high moisture
transverse
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王显峰
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Shenzhen Hongxiang New Material Development Co Ltd
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Shenzhen Hongxiang New Material Development Co Ltd
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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
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • 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
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D01D1/09—Control of pressure, temperature or feeding rate
    • 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
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • 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
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • 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
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent

Abstract

The invention relates to a high moisture conductivity polyester fiber and a preparation method thereof, according to the FDY process, after PET melt and PTT melt are distributed, FDY filaments are prepared by extrusion from spinneret orifices on the same spinneret plate, and relaxation heat treatment is carried out to obtain the high moisture conductivity polyester fiber; the spinneret orifice is
Figure DDA0002349368100000011
The shape of the spinneret orifice is formed,
Figure DDA0002349368100000012
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 50-60 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the length-width ratio of the oblique line I is 2.5-3.5: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II; the finally prepared high moisture conductivity polyester fiber has a distorted shape. The invention adopts a simple preparation method to prepare the polyester fiber which is beneficial to water discharge.

Description

High-moisture-conductivity polyester fiber and preparation method thereof
Technical Field
The invention belongs to the technical field of fibers, and relates to a high-moisture-permeability polyester fiber and a preparation method thereof.
Background
At present, the domestic chemical fiber mainly adopts polyester filament as a raw material, the cross section of the chemical fiber is round or similar to a round shape, and the chemical fiber is stuffy and wet when being worn, is not breathable and lacks comfort due to poor moisture absorption of the polyester, so that improvement is urgently needed. The current method is to design the profiled fiber with moisture permeability.
The profiled fiber is generally prepared by specially designed and manufactured profiled spinneret plates through a special spinning process, and the method is the most commonly used method for producing profiled fibers at home and abroad. The producer can produce the profiled fiber with any section shape by improving and optimizing the processing technology of the guide holes and the micropores of the spinneret plate and the spinning technology. Common shaped fibers have various shapes such as triangle, trilobal, multilobal, cross, hollow fiber and the like. However, the grooves of the regular profiled fibers are on the same side, which is not favorable for guiding out moisture, and the moisture-guiding efficiency of the profiled fibers needs to be further improved.
Therefore, a high moisture-conductive polyester fiber which facilitates moisture discharge is in need of research.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the high-moisture-permeability polyester fiber which is beneficial to moisture discharge.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of high-wet-conductivity polyester fiber comprises the steps of distributing PET melt and PTT melt according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high-wet-conductivity polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000011
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000012
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line;
the included angle between the oblique line I or the oblique line II and the transverse line is 50-60 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 2.5-3.5: 1;
the distribution refers to controlling the PET melt to flow through a transverse line and simultaneously controlling the PTT melt to flow through a slant line I and a slant line II.
According to the invention, the shape and size of the spinneret orifice are reasonably designed, so that the fiber is twisted, the structure of the fiber is favorable for water to be led out, and the mechanism is as follows:
in the spinning process of synthetic fibers, when the fibers are formed, the inside of the fibers can be oriented and crystallized, so that the fibers have internal stress, when external conditions are changed, such as heating or contact with water, the formed fibers can be deformed due to environmental changes, namely, the oriented parts or crystallized areas in the fibers can be changed relatively, the internal stress of the fibers is an additional interaction force for trying to restore the deformed fibers to the initial state, for different polymers, the orientation and the crystallization inside the fibers are different, and therefore, the internal stress generated by different polymers is different;
in the present invention, the spinneret orifice is
Figure BDA0002349368080000021
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000022
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the slash I and the slash II are positioned on two opposite sides of the transverse line, the widths of the slash I and the slash II are the same, the lengths of the slash I and the slash II are larger than the width of the transverse line, the slash I and the slash II are made of PTT, and the transverse line is made of PET;
at the contact position of the oblique line I or the oblique line II and the transverse line, two internal stresses in opposite directions exist simultaneously, the internal stress in one direction is originated from PET, the internal stress in the other direction is originated from PTT, and the internal stresses in the two opposite directions are mutually offset to form the internal stress in a single direction;
because the lengths of the oblique line I and the oblique line II are greater than the width of the transverse line, and the internal stress of the PTT is greater than that of the PET, the final direction of the internal stress points to the oblique line I at the position where the oblique line I is in contact with the transverse line, and the final direction of the internal stress points to the oblique line II at the position where the oblique line II is in contact with the transverse line, and because the oblique line I and the oblique line II are positioned on the two opposite sides of the transverse line, the final direction of the internal stress at the position where the oblique line I is in contact with the transverse line is opposite to the final direction of the internal stress at the position where the oblique line II is
Figure BDA0002349368080000023
The fiber has a self-twisting structure, so that the surface of the fiber on a unit length is actively and greatly increased, the fiber can be contacted with more water to lead the water out, and the groove on the fiber is twisted, the fiber moisture conduction mainly depends on the wicking action of a capillary tube generated by the groove, the water flows along the groove, the form of the groove determines whether the water transmission is smooth, and after the groove is twisted, a plurality of channels communicated with the inside and the outside can be formed on the fabric made of the fiber, so that the water is more conveniently led out, and the problems that the water is enriched in the inner layer of the fiber and is difficult to lead out are solved;
in addition, since the widths of the oblique line I and the oblique line II are the same and the lengths of the oblique line I and the oblique line II are the same, the internal stress at the position where the oblique line I contacts the transverse line is equal to the internal stress at the position where the oblique line II contacts the transverse line, and then the internal stress and the internal stress are matched
Figure BDA0002349368080000024
Dimensional parameters of the shape such that the twist angle per unit length of the fiber
Figure BDA0002349368080000025
Reaching 25-170 DEG/10 mu m, which is beneficial toThe performance of the fiber is balanced.
As a preferable scheme:
according to the preparation method of the high-wet-permeability polyester fiber, the mass ratio of the PET melt to the PTT melt is 50: 50.
According to the preparation method of the high moisture conductivity polyester fiber, the parameters of the FDY process are as follows: the spinning temperature is 275-278 ℃, the cooling temperature is 20-25 ℃, the speed of a first roller is 2000-2200 m/min, the temperature of a first roller is 75-85 ℃, the speed of a second roller is 3000-3200 m/min, the temperature of the second roller is 125-130 ℃, and the winding speed is 2930-3110 m/min.
The preparation method of the high-wet-permeability polyester fiber adopts the composite spinning assembly, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom;
the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through;
the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2;
the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular;
the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides;
a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3;
the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000031
The shape groove, E corresponds to the horizontal line, F corresponds to the oblique line I, G corresponds to the oblique line II, the through hole on M3 is positioned at the two ends of E, the through hole on O3 is positioned at one end of F far away from E, and the through hole on I3 is positioned at G far away from EOne end of E;
on the spinneret plate
Figure BDA0002349368080000032
Guide hole of spinneret orifice and
Figure BDA0002349368080000033
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the composite spinning assembly is positioned in the assembly spinning manifold.
According to the preparation method of the high-moisture-permeability polyester fiber, the intrinsic viscosity of the PET melt is 0.55-0.60 dL/g, the temperature of the PET melt spinning box body is 275-280 ℃, the intrinsic viscosity of the PTT melt is 1.10-1.20 dL/g, the temperature of the PTT melt spinning box body is 265-270 ℃, and the temperature of the assembly spinning box body is 275-278 ℃. The invention reasonably sets the temperature of the PET melt spinning box body, the PTT melt spinning box body and the component spinning box body, and ensures that the apparent viscosity of the PET component and the PTT component extruded from the spinneret orifices is relatively close, thereby ensuring the smooth proceeding of spinning.
According to the preparation method of the high-moisture-permeability polyester fiber, the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
The invention also provides the high moisture conductivity polyester fiber prepared by the preparation method of the high moisture conductivity polyester fiber, and the cross section of the high moisture conductivity polyester fiber is in a shape of
Figure BDA0002349368080000034
In the shape of a square,
Figure BDA0002349368080000035
the shape of the product is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line, wherein the transverse line is made of PET, and the slash I and the slash II are made of PTT; the high moisture conductivity polyester fiber has a twisted morphology.
As a preferable scheme:
the high moisture permeability polyester fiber, the twist angle per unit length of the high moisture permeability polyester fiber
Figure BDA0002349368080000036
25 to 170 DEG/10 μm of (
Figure BDA0002349368080000037
l is the length of the fiber section with a number of turns of 1 in μm).
According to the high-moisture-conductivity polyester fiber, the breaking strength of the high-moisture-conductivity polyester fiber is more than or equal to 3.0cN/dtex, the elongation at break is 45.0 +/-4.5%, and the fineness of the multifilament is 75-150 dtex; the gram weight of the fabric made of the high moisture-conducting polyester fiber is 140-160 g/m2Moisture absorption (GB/T21655.12008): the water absorption rate is more than or equal to 271 percent, the dripping water diffusion time is less than or equal to 1.8 seconds, and the wicking height is more than or equal to 143 mm; quick drying (GB/T21655.12008): the evaporation rate is more than or equal to 0.39 g/h.
Has the advantages that:
(1) according to the preparation method of the high-moisture-conductivity polyester fiber, the shape and the size of the spinneret orifice are reasonably designed, so that the fiber is twisted, and the moisture conductivity of the PET/PTT bicomponent composite fiber is improved;
(2) according to the preparation method of the high-moisture-conductivity polyester fiber, the temperature of the PTT melt spinning box body, the PET melt spinning box body and the component spinning box body is reasonably set, so that the smooth spinning of the PET/PTT two-component composite fiber is ensured;
(3) the preparation method of the high-moisture-permeability polyester fiber has the advantages of simple process, low cost and great application prospect;
(4) the high-moisture-permeability polyester fiber prepared by the invention has excellent comprehensive performance.
Drawings
FIG. 1 is an exploded schematic view of a composite spin pack assembly;
FIGS. 2-3 are schematic structural views of two side surfaces of a first distribution plate;
FIGS. 4 to 5 are schematic structural views of two side surfaces of the second distribution plate;
FIGS. 6 to 7 are schematic structural views of the surfaces of both sides of the third distribution plate;
fig. 8 is a schematic view of the structure of the spinneret plate.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.55dL/g) and PTT melt (intrinsic viscosity is 1.1dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifices on the spinneret plate are
Figure BDA0002349368080000041
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000042
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 50 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 2.5: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the spinning adopts a composite spinning assembly, the composite spinning assembly is positioned in an assembly spinning manifold, and as shown in figures 1-8, the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided withThe outer ring groove O3, the middle ring groove M3 and the inner ring groove I3 are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000043
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000051
Guide hole of spinneret orifice and
Figure BDA0002349368080000052
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 20 ℃, the first roller speed is 2000m/min, the first roller temperature is 75 ℃, the second roller speed is 3000m/min, the second roller temperature is 125 ℃, and the winding speed is 2930 m/min;
the temperature of the PET melt spinning box body is 275 ℃, the temperature of the PTT melt spinning box body is 265 ℃, and the temperature of the assembly spinning box body is 275 ℃;
the temperature of the relaxation heat treatment is 90 deg.C, and the time is 30 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a section
Figure BDA0002349368080000053
In the shape of a square,
Figure BDA0002349368080000054
the shape of the product is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line, wherein the transverse line is made of PET, and the slash I and the slash II are made of PTT; high moisture-conducting polyester fibre toolHas a twisted shape and a twist angle per unit length
Figure BDA0002349368080000058
25 °/10 μm; the breaking strength of the high moisture-conductive polyester fiber is 3cN/dtex, the elongation at break is 49.5%, and the fineness of the multifilament is 75 dtex; the gram weight of the fabric made of the high moisture conductivity polyester fiber is 140g/m2Moisture absorption: the water absorption rate is 271%, the drip diffusion time is 1.8 seconds, and the wicking height is 143 mm; quick drying: the evaporation rate was 0.39 g/h.
Example 2
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.57dL/g) and PTT melt (intrinsic viscosity is 1.18dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000055
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000056
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 57 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 2.8: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove, with O2 and I2 are not communicated; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000057
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000061
Guide hole of spinneret orifice and
Figure BDA0002349368080000062
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 21 ℃, the one-roll speed is 2031m/min, the one-roll temperature is 77 ℃, the two-roll speed is 3034m/min, the two-roll temperature is 127 ℃, and the winding speed is 2941 m/min;
the temperature of the PET melt spinning box body is 276 ℃, the temperature of the PTT melt spinning box body is 265 ℃, and the temperature of the assembly spinning box body is 275 ℃;
the temperature of the relaxation heat treatment is 95 deg.C, and the time is 30 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a sectionIn the shape of a square,
Figure BDA0002349368080000064
the shape of the bag is composed of transverse lines, and oblique lines I and II connected with the transverse lines, wherein the transverse lines are made of PET, and the oblique lines I and II correspond to each otherThe material of the material is PTT; the high moisture-permeability polyester fiber has a twisted shape and a twist angle per unit length
Figure BDA0002349368080000067
35 °/10 μm; the breaking strength of the high moisture-conductive polyester fiber is 3cN/dtex, the elongation at break is 48.2%, and the fineness of the multifilament is 75 dtex; the gram weight of the fabric made of the high moisture conductivity polyester fiber is 140g/m2Moisture absorption: water absorption 272%, drip diffusion time 1.4 seconds, wicking height 144 mm; quick drying: the evaporation rate was 0.39 g/h.
Example 3
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.57dL/g) and PTT melt (intrinsic viscosity is 1.14dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000065
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000066
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 57 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 3.2: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves IIAre communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000071
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000072
Guide hole of spinneret orifice and
Figure BDA0002349368080000073
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 23 ℃, the first-roller speed is 2055m/min, the first-roller temperature is 80 ℃, the two-roller speed is 3065m/min, the two-roller temperature is 129 ℃, and the winding speed is 2963 m/min;
the temperature of the PET melt spinning box body is 276 ℃, the temperature of the PTT melt spinning box body is 265 ℃, and the temperature of the component spinning box body is 276 ℃;
the temperature of the relaxation heat treatment was 96 ℃ and the time was 27 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a section
Figure BDA0002349368080000074
In the shape of a square,
Figure BDA0002349368080000075
the shape is composed of transverse lines, and oblique lines I and II connected with the transverse linesThe material is PET, and the material corresponding to the oblique line I and the oblique line II is PTT; the high moisture-permeability polyester fiber has a twisted shape and a twist angle per unit length
Figure BDA0002349368080000078
57 DEG/10 mu m; the breaking strength of the high moisture-conductive polyester fiber is 3cN/dtex, the elongation at break is 48.2%, and the fineness of the multifilament is 84 dtex; the gram weight of the fabric made of the high moisture conductivity polyester fiber is 149g/m2Moisture absorption: the water absorption rate is 273%, the drip diffusion time is 1.1 seconds, and the wicking height is 145 mm; quick drying: the evaporation rate was 0.39 g/h.
Example 4
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.56dL/g) and PTT melt (intrinsic viscosity is 1.14dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000076
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000077
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 58 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 2.6: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove which are distributed in a concentric circle mannerGroove I2; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000081
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000082
Guide hole of spinneret orifice and
Figure BDA0002349368080000083
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the speed of one roller is 2086m/min, the temperature of one roller is 82 ℃, the speed of two rollers is 3094m/min, the temperature of two rollers is 129 ℃, and the winding speed is 2991 m/min;
the temperature of the PET melt spinning box body is 277 ℃, the temperature of the PTT melt spinning box body is 268 ℃, and the temperature of the component spinning box body is 276 ℃;
the temperature of the relaxation heat treatment is 99 deg.C, and the time is 23 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a section
Figure BDA0002349368080000084
In the shape of a square,
Figure BDA0002349368080000085
form is composed of transverse lines and oblique lines connected with the transverse linesThe line I and the oblique line II are formed, the transverse line is made of PET, and the oblique line I and the oblique line II are made of PTT; the high moisture-permeability polyester fiber has a twisted shape and a twist angle per unit length
Figure BDA0002349368080000088
85 DEG/10 mu m; the breaking strength of the high moisture-conductive polyester fiber is 3cN/dtex, the elongation at break is 47.7%, and the fineness of the multifilament is 122 dtex; the gram weight of the fabric made of the high moisture-conducting polyester fiber is 147g/m2Moisture absorption: the water absorption was 286%, the drip diffusion time was 1 second, and the wicking height was 148 mm; quick drying: the evaporation rate was 0.41 g/h.
Example 5
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.6dL/g) and PTT melt (intrinsic viscosity is 1.13dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000086
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000087
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 53 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 3.1: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through; the second distribution plate is provided with outer rings which are distributed in concentric circlesThe groove O2, the middle ring groove M2 and the inner ring groove I2; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000091
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000092
Guide hole of spinneret orifice and
Figure BDA0002349368080000093
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the speed of one roller is 2099m/min, the temperature of one roller is 84 ℃, the speed of two rollers is 3095m/min, the temperature of two rollers is 130 ℃, and the winding speed is 3054 m/min;
the temperature of the PET melt spinning box body is 277 ℃, the temperature of the PTT melt spinning box body is 268 ℃, and the temperature of the component spinning box body is 277 ℃;
the temperature of the relaxation heat treatment was 101 ℃ and the time was 22 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a section
Figure BDA0002349368080000094
In the shape of a square,
Figure BDA0002349368080000095
the shape of the product is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line, wherein the transverse line is made of PET, and the slash I and the slash II are made of PTT; the high moisture-permeability polyester fiber has a twisted shape and a twist angle per unit length
Figure BDA0002349368080000098
104 DEG/10 mu m; the breaking strength of the high moisture-conductive polyester fiber is 3.2cN/dtex, the elongation at break is 44%, and the fineness of the multifilament is 97 dtex; the gram weight of the fabric made of the high moisture conductivity polyester fiber is 141g/m2Moisture absorption: the water absorption rate was 287%, the drip diffusion time was 1 second, and the wicking height was 155 mm; quick drying: the evaporation rate was 0.41 g/h.
Example 6
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.6dL/g) and PTT melt (intrinsic viscosity is 1.17dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000096
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000097
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 57 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 3.5: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through; second branchThe matching plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000101
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000102
Guide hole of spinneret orifice and
Figure BDA0002349368080000103
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the first roller speed is 2122m/min, the first roller temperature is 85 ℃, the second roller speed is 3145m/min, the second roller temperature is 130 ℃, and the winding speed is 3055 m/min;
the temperature of the PET melt spinning box body is 278 ℃, the temperature of the PTT melt spinning box body is 268 ℃, and the temperature of the component spinning box body is 278 ℃;
the temperature of the relaxation heat treatment was 118 ℃ and the time was 20 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a section
Figure BDA0002349368080000104
In the shape of a square,
Figure BDA0002349368080000105
the shape of the product is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line, wherein the transverse line is made of PET, and the slash I and the slash II are made of PTT; the high moisture-permeability polyester fiber has a twisted shape and a twist angle per unit length
Figure BDA0002349368080000108
114 DEG/10 mu m; the breaking strength of the high moisture-conductive polyester fiber is 3.2cN/dtex, the elongation at break is 41.5%, and the fineness of the multifilament is 114 dtex; the gram weight of the fabric made of the high moisture-conducting polyester fiber is 155g/m2Moisture absorption: the water absorption rate was 287%, the drip diffusion time was 1 second, and the wicking height was 155 mm; quick drying: the evaporation rate was 0.42 g/h.
Example 7
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.57dL/g) and PTT melt (intrinsic viscosity is 1.1dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000106
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000107
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 51 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 2.9: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a PTT melt flowing throughA runner A1 and a runner B1 for PET melt to flow through; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000111
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000112
Guide hole of spinneret orifice and
Figure BDA0002349368080000113
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: cooling at 25 deg.C, a first roller speed of 2167m/min, a first roller temperature of 85 deg.C, a second roller speed of 3199m/min, a second roller temperature of 130 deg.C, and a winding speed of 3058 m/min;
the temperature of the PET melt spinning box body is 279 ℃, the temperature of the PTT melt spinning box body is 270 ℃, and the temperature of the component spinning box body is 278 ℃;
the temperature of the relaxation heat treatment is 120 deg.C, and the time is 20 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a section
Figure BDA0002349368080000114
In the shape of a square,
Figure BDA0002349368080000115
the shape of the product is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line, wherein the transverse line is made of PET, and the slash I and the slash II are made of PTT; the high moisture-permeability polyester fiber has a twisted shape and a twist angle per unit length
Figure BDA0002349368080000118
152 DEG/10 mu m; the breaking strength of the high moisture-conductive polyester fiber is 3.2cN/dtex, the elongation at break is 41 percent, and the fineness of the multifilament is 90 dtex; the gram weight of the fabric made of the high moisture conductivity polyester fiber is 143g/m2Moisture absorption: water absorption was 287%, drip diffusion time was 1 second, wicking height was 157 mm; quick drying: the evaporation rate was 0.43 g/h.
Example 8
A preparation method of high moisture-conducting polyester fiber comprises the steps of distributing PET melt (intrinsic viscosity is 0.6dL/g) and PTT melt (intrinsic viscosity is 1.2dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the PET melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain the high moisture-conducting polyester fiber;
the spinneret orifice is
Figure BDA0002349368080000116
The shape of the spinneret orifice is formed,
Figure BDA0002349368080000117
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I or the oblique line II and the transverse line is 60 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 3.5: 1; the distribution means that the PET melt is controlled to flow through a transverse line, and the PTT melt is controlled to flow through a slant line I and a slant line II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; first of allThe distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure BDA0002349368080000121
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Figure BDA0002349368080000122
Guide hole of spinneret orifice and
Figure BDA0002349368080000123
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the one-roll speed is 2200m/min, the one-roll temperature is 85 ℃, the two-roll speed is 3200m/min, the two-roll temperature is 130 ℃, and the winding speed is 3110 m/min;
the temperature of the PET melt spinning box body is 280 ℃, the temperature of the PTT melt spinning box body is 270 ℃, and the temperature of the component spinning box body is 278 ℃;
the temperature of the relaxation heat treatment is 120 deg.C, and the time is 20 min.
The cross section of the prepared high moisture conductivity polyester fiber is in the shape of a section
Figure BDA0002349368080000124
In the shape of a square,
Figure BDA0002349368080000125
the shape of the product is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line, wherein the transverse line is made of PET, and the slash I and the slash II are made of PTT; the high moisture-permeability polyester fiber has a twisted shape and a twist angle per unit length
Figure BDA0002349368080000126
170 °/10 μm; the breaking strength of the high moisture-conductive polyester fiber is 3.3cN/dtex, the elongation at break is 40.5%, and the fineness of the multifilament is 150 dtex; the gram weight of the fabric made of the high moisture-conducting polyester fiber is 160g/m2Moisture absorption: water absorption of 302%, drip diffusion time of 0.6 seconds, wicking height of 159 mm; quick drying: the evaporation rate was 0.43 g/h.

Claims (9)

1. A preparation method of high moisture conductivity polyester fiber is characterized in that: according to the FDY process, after PET melt and PTT melt are distributed, FDY filaments are obtained by extrusion from spinneret orifices on the same spinneret plate, and relaxation heat treatment is carried out to obtain high-moisture-conductivity polyester fibers;
the spinneret orifice is
Figure FDA0002349368070000011
The shape of the spinneret orifice is formed,
Figure FDA0002349368070000012
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line;
the included angle between the oblique line I or the oblique line II and the transverse line is 50-60 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the widths of the oblique line I and the oblique line II are the same as the widths of the transverse lines; the ratio of the length to the width of the oblique line I is 2.5-3.5: 1;
the distribution refers to controlling the PET melt to flow through a transverse line and simultaneously controlling the PTT melt to flow through a slant line I and a slant line II.
2. The method for preparing the polyester fiber with high moisture permeability as claimed in claim 1, wherein the mass ratio of the PET melt to the PTT melt is 50: 50.
3. The method for preparing the polyester fiber with high moisture permeability according to claim 1, wherein the parameters of the FDY process are as follows: the cooling temperature was 20225 ℃, the one-roll speed was 200022200m/min, the one-roll temperature was 75275 ℃, the two-roll speed was 300023200m/min, the two-roll temperature was 1252130 ℃, and the winding speed was 293023110 m/min.
4. The method for preparing the polyester fiber with high moisture permeability according to claim 3, wherein a composite spinning assembly is adopted, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are closely attached from top to bottom;
the first distribution plate is provided with a runner A1 for the PTT melt to flow through and a runner B1 for the PET melt to flow through;
the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2;
the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular;
the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides;
a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3;
the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
Figure FDA0002349368070000013
The shape groove, E corresponds to the horizontal line, F corresponds to the oblique line I, G corresponds to the oblique line II, the through hole on M3 is positioned at the two ends of E, the through hole on O3 is positioned at one end of F far away from E, the through hole on I3 is positioned at one end of G far away from E；
On the spinneret plate
Figure FDA0002349368070000014
Guide hole of spinneret orifice and
Figure FDA0002349368070000015
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the composite spinning assembly is positioned in the assembly spinning manifold.
5. The method of claim 4, wherein the intrinsic viscosity of the PET melt is 0.5520.60dL/g, the temperature of the PET melt spinning beam is 2752270 ℃, the intrinsic viscosity of the PTT melt is 1.1021.20dL/g, the temperature of the PTT melt spinning beam is 2652270 ℃, and the temperature of the assembly spinning beam is 2752277 ℃.
6. The method for preparing polyester fiber with high moisture permeability as claimed in claim 5, wherein the temperature of the relaxation heat treatment is 902120 ℃ and the time is 20230 min.
7. The high moisture conductive polyester fiber produced by the process of any one of claim 126, wherein: the cross section of the high moisture conductivity polyester fiber is in the shape of
Figure FDA0002349368070000021
In the shape of a square,
Figure FDA0002349368070000022
the shape of the product is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line, wherein the transverse line is made of PET, and the slash I and the slash II are made of PTT; the high moisture conductivity polyester fiber has a twisted morphology.
8. The high moisture conductive polyester fiber according to claim 7, wherein the twist angle per unit length of the high moisture conductive polyester fiber is 252170 °/10 μm.
9. The high moisture conductive polyester fiber according to claim 7, wherein the high moisture conductive polyester fiber has a breaking strength of not less than 3.0cN/dtex, an elongation at break of 45.0 ± 4.5%, and a multifilament fineness of 752150 dtex; the gram weight of the fabric made of the high moisture-conductive polyester fiber is 1402160g/m2Moisture absorption: the water absorption rate is more than or equal to 271 percent, the dripping water diffusion time is less than or equal to 1.7 seconds, and the wicking height is more than or equal to 143 mm; quick drying: the evaporation rate is more than or equal to 0.39 g/h.
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