CN111020725A - Special-shaped quick-drying fiber and preparation method thereof - Google Patents

Special-shaped quick-drying fiber and preparation method thereof Download PDF

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CN111020725A
CN111020725A CN201911403204.9A CN201911403204A CN111020725A CN 111020725 A CN111020725 A CN 111020725A CN 201911403204 A CN201911403204 A CN 201911403204A CN 111020725 A CN111020725 A CN 111020725A
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segment
quick
vertical line
shaped
melt
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王荣誉
王显峰
李文刚
张伟
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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
    • 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 profiled quick-drying fiber and a preparation method thereof, according to the FDY process, after CDP melt and PTT melt are distributed, FDY filaments are prepared by extrusion from spinneret orifices on the same spinneret plate, and then the profiled quick-drying fiber is obtained by relaxation heat treatment; the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X comprises X1Segment and X2Segment, vertical line Y including Y1Segment and Y2A segment; the width of each section is the same as that of the transverse line Z; the lengths of the sections are the same, and the length of the vertical line X or the vertical line Y is X16.0-8.0 times of the section width, and the length of the transverse line Z is X15.0-6.0 times of the section width; distribution means controlling the flow of PTT melt through X2Segment and Y1Section and sameControlling CDP melt flow through X1Segment, Y2Segment and transverse lines Z; the finally prepared special-shaped quick-drying fiber has a twisted shape. The invention adopts a simple preparation method to prepare the fiber which is beneficial to water discharge.

Description

Special-shaped quick-drying fiber and preparation method thereof
Technical Field
The invention belongs to the technical field of fibers, and relates to a special-shaped quick-drying 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, it is desired to develop a profiled quick-drying fiber that facilitates moisture removal.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the special-shaped quick-drying fiber which is beneficial to water discharge.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt and PTT melt according to FDY process, extruding the CDP melt and PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side;
X1segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X16.0-8.0 times of the section width, and the length of the transverse line Z is X15.0-6.0 times of the section width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.2-1.5 times of the section width;
the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse line Z.
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 invention, the spinneret orifice is an H-shaped spinneret orifice, the H shape consists of a vertical line X, a vertical line Y and a horizontal line Z, and the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x2Segment and Y1The segments are respectively located on two opposite sides of the transverse line, X2The width of the segment being equal to Y1Width of the segment, X2The length of the segment being equal to Y1Length of the segment, X2Segment and Y1Length of segmentDegree greater than width of transverse line, X2Segment and Y1The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line are made of CDP materials;
at X2Segment or Y1At the contact position of the segment and the transverse line, two internal stresses in opposite directions exist simultaneously, the internal stress in one direction is originated from CDP, the internal stress in the other direction is originated from PTT, and the internal stresses in the two opposite directions are mutually counteracted to form the internal stress in a single direction;
due to X2Segment and Y1The length of the segments is greater than the width of the transverse lines and the internal stress of the PTT is greater than that of the CDP, so that at X2The position of contact of the segments with the transverse line, the final direction of the internal stress pointing towards X2Segment at Y1The position of contact of the segments with the transverse line, the final direction of the internal stress pointing in Y1Segment due to X2Segment and Y1The segments being on opposite sides of the transverse line, thus at X2Final direction of internal stress at the position of contact of the segment with the transverse line and in Y1The final directions of the internal stresses at the contact positions of the sections and the transverse lines are opposite, two internal stresses in opposite directions exist on the H-shaped cross section of the fiber at the same time, the fiber is twisted to form a self-twisted structure, the fiber has the self-twisted structure, on one hand, the surface of the fiber in unit length is actively increased, the fiber can be in contact with more moisture to lead out the moisture, on the other hand, the groove on the fiber is twisted, the moisture conduction of the fiber is mainly realized by means of the wicking action of a capillary tube generated by the groove, the moisture flows along the groove, the form of the groove determines whether the moisture transmission is smooth, and after the groove is twisted, a plurality of channels which are communicated with each other inside and outside can be formed on the fabric made of the fiber, so that the moisture is more conveniently led out, and the problems that the;
in addition, due to X2The width of the segment being equal to Y1Width of the segment, X2The length of the segment being equal to Y1Length of the segment, thus in X2Internal stress at the position of contact of the segments with the transverse line equal to Y1The internal stress of the contact position of the section and the transverse line is matched with the size parameter of the H shape, so that the single fiber is formedTwist angle of bit length
Figure BDA0002347970010000021
The thickness of the fiber reaches 18-180 DEG/10 mu m, and the performance of the fiber in all aspects is favorably considered.
As a preferable scheme:
according to the preparation method of the special-shaped quick-drying fiber, the mass ratio of the CDP melt to the PTT melt is 45: 55-50: 50.
According to the preparation method of the special-shaped quick-drying fiber, the parameters of the FDY process are as follows: the spinning temperature is 270-275 ℃, the cooling temperature is 20-25 ℃, the one-roll speed is 2000-2200 m/min, the one-roll temperature is 70-80 ℃, the two-roll speed is 2800-3000 m/min, the two-roll temperature is 125-130 ℃, and the winding speed is 2730-2910 m/min.
The preparation method of the profiled quick-drying 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 CDP 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, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000031
the shape of the groove G is as follows,a group of E, F and G are connected to form an H-shaped groove, and E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G;
the guide hole of the H-shaped spinneret orifice on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped.
According to the preparation method of the special-shaped quick-drying fiber, the intrinsic viscosity of the CDP melt is 0.58-0.62 dL/g, the temperature of the CDP 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 270-275 ℃. The invention reasonably sets the temperature of the CDP melt spinning box body, the PTT melt spinning box body and the component spinning box body, and ensures that the apparent viscosity of the CDP component and the PTT component extruded from the spinneret orifice is relatively close, thereby ensuring the smooth proceeding of spinning.
According to the preparation method of the special-shaped quick-drying fiber, the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
The invention also provides the profiled quick-drying fiber prepared by the preparation method of the profiled quick-drying fiber, the cross section of the profiled quick-drying fiber is H-shaped, the H-shaped is composed of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the profiled quick drying fibers have a twisted morphology.
As a preferable scheme:
the profiled quick-drying fiber has the twist angle per unit length
Figure BDA0002347970010000032
18 to 180 DEG/10 μm of (
Figure BDA0002347970010000033
l is the length of the fiber section with a number of turns of 1 in μm).
The profiled quick-drying fiber has the breaking strength of more than or equal to 2.8cN/dtex, the elongation at break of 50.0 +/-5.0 percent and the multifilament fineness of 100-200 dtex; the gram weight of the fabric made of the special-shaped quick-drying fibers is 140-160 g/m2Moisture absorption (GB/T21655.12008): the water absorption rate is more than or equal to 273 percent, the drip diffusion time is less than or equal to 1.9 seconds, and the wicking height is more than or equal to 141 mm; quick drying (GB/T21655.12008): the evaporation rate is more than or equal to 0.38 g/h.
Has the advantages that:
(1) according to the preparation method of the special-shaped quick-drying fiber, the shape and the size of the spinneret orifice are reasonably designed, so that the fiber is twisted, and the water-guiding capacity of the CDP/PTT two-component composite fiber is improved;
(2) according to the preparation method of the special-shaped quick-drying fiber, the temperature of the PTT melt spinning box, the CDP melt spinning box and the component spinning box is reasonably set, so that the smooth spinning of the CDP/PTT two-component composite fiber is ensured;
(3) the preparation method of the special-shaped quick-drying fiber has the advantages of simple process, low cost and great application prospect;
(4) the special-shaped quick-drying 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 profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.58dL/g) and PTT melt (intrinsic viscosity is 1.1dL/g) in a mass ratio of 45:55 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifices on the spinneret plate are H-shaped spinneret orifices, the H shape is composed of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X16 times the width of the segment, the length of the transverse line Z being X15 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.2 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a composite spinning assembly, 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 CDP 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 a plurality of concentric circles which are not communicated with each otherThe outer ring groove O3, the middle ring groove M3 and the inner ring groove I3 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, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000041
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is 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 70 ℃, the second-roller speed is 2800m/min, the second-roller temperature is 125 ℃, and the winding speed is 2730 m/min;
the temperature of the CDP melt spinning manifold is 275 ℃, the temperature of the PTT melt spinning manifold is 265 ℃, and the temperature of the component spinning manifold is 270 ℃;
the temperature of the relaxation heat treatment is 90 deg.C, and the time is 30 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000051
18 °/10 μm; the breaking strength of the profiled quick-drying fiber is2.8cN/dtex, elongation at break of 50%, multifilament fineness of 100 dtex; the gram weight of the fabric made of the special-shaped quick-drying fiber is 140g/m2Moisture absorption: the water absorption rate is 273%, the drip diffusion time is 1.9 seconds, and the wicking height is 141 mm; quick drying: the evaporation rate was 0.38 g/h.
Example 2
A preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.62dL/g) and PTT melt (intrinsic viscosity is 1.18dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X1The length of the transverse line Z is X and 8 times of the width of the section16 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.4 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a 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 CDP 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 a third distribution plate which are distributed in a concentric circle, are not communicated with each other and are in a circular ring shapeInner race groove I3; 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, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000061
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 21 ℃, the one-roll speed is 2034m/min, the one-roll temperature is 70 ℃, the two-roll speed is 2802m/min, the two-roll temperature is 126 ℃, and the winding speed is 2740 m/min;
the temperature of the CDP melt spinning manifold is 275 ℃, the temperature of the PTT melt spinning manifold is 265 ℃, and the temperature of the component spinning manifold is 270 ℃;
the temperature of the relaxation heat treatment is 99 deg.C, and the time is 27 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000062
53 °/10 μm; the breaking strength of the special-shaped quick-drying fiber is 2.8cN/dtex, the elongation at break is 48.8 percent, and the fineness of the multifilament is 48188 dtex; the gram weight of the fabric made of the special-shaped quick-drying fiber is 147g/m2Moisture absorption: water absorption of 273%, drip diffusion time of 1.9 seconds, wicking height of 146 mm; quick drying: the evaporation rate was 0.39 g/h.
Example 3
A preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.59dL/g) and PTT melt (intrinsic viscosity is 1.2dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X1The length of the transverse line Z is X and 8 times of the width of the section15 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.4 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a 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 CDP 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; o2 coincides exactly with the orthographic projection of O3,m2 completely coincides with the orthographic projection of M3, and I2 completely coincides with the orthographic projection of I3; 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, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000071
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the first-roller speed is 2060m/min, the first-roller temperature is 71 ℃, the second-roller speed is 2814m/min, the second-roller temperature is 126 ℃, and the winding speed is 2781 m/min;
the temperature of the CDP melt spinning manifold is 275 ℃, the temperature of the PTT melt spinning manifold is 266 ℃, and the temperature of the assembly spinning manifold is 270 ℃;
the temperature of the relaxation heat treatment was 103 ℃ and the time was 27 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000072
84 DEG/10 mu m; the breaking strength of the special-shaped quick-drying fiber is 2.8cN/dtex, the elongation at break is 48.6%, and the fineness of the multifilament is 154 dtex; fabric made of special-shaped quick-drying fibersHas a gram weight of 147g/m2Moisture absorption: the water absorption was 278%, the drip diffusion time was 1.7 seconds, and the wicking height was 148 mm; quick drying: the evaporation rate was 0.39 g/h.
Example 4
A preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.62dL/g) and PTT melt (intrinsic viscosity is 1.19dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X16 times the width of the segment, the length of the transverse line Z being X16 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.3 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a 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 CDP 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 coincideThe shadows are completely overlapped; 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, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000081
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the first roller speed is 2118m/min, the first roller temperature is 74 ℃, the second roller speed is 2819m/min, the second roller temperature is 126 ℃, and the winding speed is 2787 m/min;
the temperature of the CDP melt spinning manifold is 275 ℃, the temperature of the PTT melt spinning manifold is 267 ℃, and the temperature of the component spinning manifold is 270 ℃;
the temperature of the relaxation heat treatment was 109 ℃ and the time was 26 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000082
91 °/10 μm; the breaking strength of the special-shaped quick-drying fiber is 2.8cN/dtex, the elongation at break is 48.3 percent, and the fineness of the multifilament is 145 dtex; the gram weight of the fabric made of the special-shaped quick-drying fiber is 141g/m2Moisture absorption: water absorptionThe rate was 280%, the drip diffusion time was 1.6 seconds, and the wicking height was 151 mm; quick drying: the evaporation rate was 0.4 g/h.
Example 5
A preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.58dL/g) and PTT melt (intrinsic viscosity is 1.11dL/g) in a mass ratio of 50:50 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X1The length of the transverse line Z is X and 8 times of the width of the section15 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.3 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a 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 CDP 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 communicating with O2 and I2, B1 communicating with M2(ii) a 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, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000091
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the one-roller speed is 2133m/min, the one-roller temperature is 74 ℃, the two-roller speed is 2871m/min, the two-roller temperature is 126 ℃, and the winding speed is 2849 m/min;
the temperature of the CDP melt spinning manifold is 275 ℃, the temperature of the PTT melt spinning manifold is 268 ℃, and the temperature of the component spinning manifold is 273 ℃;
the temperature of the relaxation heat treatment was 115 ℃ for 25 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000092
95 °/10 μm; the breaking strength of the special-shaped quick-drying fiber is 2.9cN/dtex, the elongation at break is 47.3 percent, and the fineness of the multifilament is 119 dtex; the gram weight of the fabric made of the special-shaped quick-drying fiber is 140g/m2Moisture absorption: water absorption of 285%, drip diffusion time of 1.4 seconds, wickingThe height is 151 mm; quick drying: the evaporation rate was 0.4 g/h.
Example 6
A preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.6dL/g) and PTT melt (intrinsic viscosity is 1.19dL/g) in a mass ratio of 45:55 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X1The length of the transverse line Z is X and is 7 times of the width of the section15 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.3 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a 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 CDP 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; the bottoms of the O2, M2, I2, O3, M3 and I3 are respectively provided withA plurality of through holes; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000101
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the first roller speed is 2149m/min, the first roller temperature is 75 ℃, the second roller speed is 2877m/min, the second roller temperature is 127 ℃, and the winding speed is 2872 m/min;
the temperature of the CDP melt spinning manifold is 277 ℃, the temperature of the PTT melt spinning manifold is 269 ℃, and the temperature of the component spinning manifold is 273 ℃;
the temperature of the relaxation heat treatment was 117 deg.C and the time was 24 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000102
153 °/10 μm; the breaking strength of the special-shaped quick-drying fiber is 3.1cN/dtex, the elongation at break is 47.2 percent, and the fineness of the multifilament is 154 dtex; the gram weight of the fabric made of the special-shaped quick-drying fiber is 159g/m2Moisture absorption: the water absorption rate was 285%, the drip diffusion time was 0.9 seconds, and the wicking height was 158 mm; quick drying: the evaporation rate was 0.42g/h。
Example 7
A preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.58dL/g) and PTT melt (intrinsic viscosity is 1.2dL/g) in a mass ratio of 45:55 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X1The length of the transverse line Z is X and is 7 times of the width of the section15 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.4 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a 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 CDP 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 third distribution plate is attached to the spinneret plateThe surface of the lower plate is a lower plate surface, and a plurality of groups of linear grooves E, linear grooves F and
Figure BDA0002347970010000111
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the one-roll speed is 2193m/min, the one-roll temperature is 78 ℃, the two-roll speed is 2887m/min, the two-roll temperature is 130 ℃, and the winding speed is 2881 m/min;
the temperature of the CDP melt spinning manifold is 280 ℃, the temperature of the PTT melt spinning manifold is 270 ℃, and the temperature of the component spinning manifold is 275 ℃;
the temperature of the relaxation heat treatment was 118 ℃ and the time was 20 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000112
163 °/10 μm; the breaking strength of the special-shaped quick-drying fiber is 3.1cN/dtex, the elongation at break is 47 percent, and the fineness of the multifilament is 160 dtex; the gram weight of the fabric made of the special-shaped quick-drying fiber is 147g/m2Moisture absorption: the water absorption rate was 292%, the drip diffusion time was 0.8 seconds, and the wicking height was 160 mm; quick drying: the evaporation rate was 0.42 g/h.
Example 8
A preparation method of profiled quick-drying fiber comprises the steps of distributing CDP melt (intrinsic viscosity is 0.62dL/g) and PTT melt (intrinsic viscosity is 1.2dL/g) in a mass ratio of 45:55 according to an FDY process, extruding the CDP melt and the PTT melt from spinneret orifices on the same spinneret plate to prepare FDY filaments, and performing relaxation heat treatment to obtain profiled quick-drying fiber;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side; x1Segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X1The length of the transverse line Z is X and 8 times of the width of the section16 times the segment width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.5 times the segment width; the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse lines Z;
the spinning adopts a 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 CDP 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, and a plurality of groups of straight plates are arranged on the lower plate surfaceLinear grooves E, linear grooves F and
Figure BDA0002347970010000121
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G; the guide hole of the H-shaped spinneret hole on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is 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 80 ℃, the two-roll speed is 3000m/min, the two-roll temperature is 130 ℃, and the winding speed is 2910 m/min;
the temperature of the CDP melt spinning manifold is 280 ℃, the temperature of the PTT melt spinning manifold is 270 ℃, and the temperature of the component spinning manifold is 275 ℃;
the temperature of the relaxation heat treatment is 120 deg.C, and the time is 20 min.
The cross section of the finally prepared special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the special-shaped quick-drying fiber has a twisted shape and a twist angle per unit length
Figure BDA0002347970010000122
180 DEG/10 mu m; the breaking strength of the special-shaped quick-drying fiber is 3.1cN/dtex, the elongation at break is 45 percent, and the fineness of the multifilament is 200 dtex; the gram weight of the fabric made of the profiled quick-drying fiber is 160g/m2Moisture absorption: water absorption of 298%, drip diffusion time of 0.7 seconds, wicking height of 162 mm; quick drying: the evaporation rate was 0.43 g/h.

Claims (9)

1. A preparation method of special-shaped quick-drying fiber is characterized by comprising the following steps: according to the FDY process, after the CDP melt and the PTT melt are distributed, FDY filaments are obtained by extruding from spinneret orifices on the same spinneret plate, and then the FDY filaments are subjected to relaxation heat treatment to obtain profiled quick-drying fibers;
the spinneret orifice is H-shaped, the H shape is composed of a vertical line X, a vertical line Y and a horizontal line Z, the vertical line X is divided into X by the horizontal line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2The sections are on the same side;
X1segment, X2Segment, Y1Segment, Y2The width of the segment is the same as that of the transverse line Z; x1Segment, X2Segment, Y1Segment and Y2The length of the segments being equal, the length of the vertical line X or Y being X16.0-8.0 times of the section width, and the length of the transverse line Z is X15.0-6.0 times of the section width; the ends of the vertical line X and the vertical line Y are fillets, and the diameter of each fillet is X11.2-1.5 times of the section width;
the distribution refers to controlling the flow of the PTT melt through X2Segment and Y1Stage, simultaneous control of CDP melt flow through X1Segment, Y2Segment and transverse line Z.
2. The preparation method of the special-shaped quick-drying fiber according to claim 1, wherein the mass ratio of the CDP melt to the PTT melt is 45: 55-50: 50.
3. The method for preparing the profiled quick-drying fiber as claimed in claim 2, wherein the parameters of the FDY process are as follows: the cooling temperature is 20-25 ℃, the speed of one roller is 2000-2200 m/min, the temperature of one roller is 70-70 ℃, the speed of two rollers is 2700-3000 m/min, the temperature of two rollers is 125-130 ℃, and the winding speed is 2730-2910 m/min.
4. The method for preparing the profiled quick-drying fiber as claimed in 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 CDP 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, and a plurality of groups of linear grooves E, linear grooves F and
Figure FDA0002347969000000011
the shape groove G, a group of E, F and G are connected into an H-shaped groove, E corresponds to X2Segment, F corresponds to Y1Segment, G corresponds to X1Segment, Y2The through hole on the segment and the transverse line Z, M3 is positioned on G, the through hole on O3 is positioned at one end of E far away from G, and the through hole on I3 is positioned at one end of F far away from G;
the guide hole of the H-shaped spinneret orifice on the spinneret plate is communicated with the H-shaped groove, and the orthographic projection of the guide hole is completely overlapped.
5. The method for preparing the special-shaped quick-drying fiber according to claim 4, wherein the intrinsic viscosity of the CDP melt is 0.57-0.62 dL/g, the temperature of the CDP melt spinning beam is 275-270 ℃, the intrinsic viscosity of the PTT melt is 1.10-1.20 dL/g, the temperature of the PTT melt spinning beam is 265-270 ℃, and the temperature of the component spinning beam is 270-275 ℃.
6. The method for preparing the profiled quick-drying fiber as claimed in claim 5, wherein the temperature of the relaxation heat treatment is 90-120 ℃ and the time is 20-30 min.
7. The profiled quick-drying fiber prepared by the preparation method of the profiled quick-drying fiber according to any one of claims 1 to 6 is characterized in that: the cross section of the special-shaped quick-drying fiber is H-shaped, the H-shaped fiber consists of a vertical line X, a vertical line Y and a transverse line Z, and the vertical line X is divided into X by the transverse line Z1Segment and X2Segment, vertical line Y divided into Y by transverse line Z1Segment and Y2Segment, X1Segment and Y1Segment on the same side, X2Segment and Y2Segment on the same side, X2Segment and Y2The corresponding material of the segment is PTT, X1Segment, Y2The section and the transverse line Z are made of CDP materials; the profiled quick drying fibers have a twisted morphology.
8. The profiled quick drying fiber according to claim 7, wherein the twist angle per unit length phi of the profiled quick drying fiber is 17 to 170 °/10 μm.
9. The profiled quick-drying fiber as claimed in claim 7, characterized in that the profiled quick-drying fiber has a breaking strength of not less than 2.7cN/dtex, an elongation at break of 50.0 ± 5.0%, and a multifilament fineness of 100-200 dtex; the gram weight of the fabric made of the special-shaped quick-drying fibers is 140-160 g/m2Moisture absorption: the water absorption rate is more than or equal to 273 percent, the drip diffusion time is less than or equal to 1.9 seconds, and the wicking height is more than or equal to 141 mm; quick drying: the evaporation rate is more than or equal to 0.37 g/h.
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