CN110983572A - Preparation method of seersucker - Google Patents

Preparation method of seersucker Download PDF

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Publication number
CN110983572A
CN110983572A CN201911408495.0A CN201911408495A CN110983572A CN 110983572 A CN110983572 A CN 110983572A CN 201911408495 A CN201911408495 A CN 201911408495A CN 110983572 A CN110983572 A CN 110983572A
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melt
vertical line
pbt
seersucker
line
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夏青
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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
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • 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
    • D01D5/28—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
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/01—Natural vegetable fibres
    • D10B2201/02—Cotton

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

The invention relates to a preparation method of seersucker, which comprises the steps of weaving 28-32 s warp yarns and 50-60 s weft yarns to obtain gray fabric, and performing relaxation heat treatment to obtain seersucker; the warp yarns are made of cotton fibers, and the weft yarns are made of profiled fibers; the preparation process of the profiled fiber comprises the following steps: according to the FDY process, after the PBT melt and the PA6 melt are distributed, FDY filaments are obtained by extrusion from spinneret orifices on the same spinneret plate, and the profiled fiber is obtained; the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; partitioning refers to controlling the flow of PBT melt through vertical lines I and II, while controlling the flow of PA6 melt through the horizontal lines. The invention adopts a simple preparation method to prepare the fiber with the twisted structure which is beneficial to the water export, thereby preparing the seersucker with strong comfort when being worn.

Description

Preparation method of seersucker
Technical Field
The invention belongs to the technical field of fibers, and relates to a preparation method of seersucker.
Background
The seersucker is a fabric with special appearance style characteristics in cotton fabrics and is processed by adopting light and thin plain weave fine cloth. The cloth cover presents small bubbles with even and dense distribution and unevenness, is not close to the skin when being worn, has cool feeling and is suitable for various clothes of women in summer. The types of seersucker are mainly: all cotton, chemical fiber or chemical fiber blend. The clothes made of the seersucker has the advantages that ironing is not needed after washing, and the shortcomings that the seersucker gradually flattens after being washed repeatedly. After washing for a certain number of times, the bubbles disappear, the clothes can not be connected with the skin in a contact point mode any more, but the clothes are attached to the body in a large area, and after sweating in summer, sweat enables the clothes to be directly contacted with the skin to cause stronger adhesive feeling, so that the wearing experience of the clothes is influenced.
Therefore, it is very important to research a method for preparing the seersucker with strong comfort when wearing.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the seersucker with strong comfort when being worn.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of seersucker comprises the steps of weaving 28-32 s of warp yarns and 50-60 s of weft yarns to obtain gray fabric, and performing relaxation heat treatment to obtain seersucker;
the warp yarns are made of cotton fibers, and the weft yarns are made of profiled fibers;
the preparation process of the profiled fiber comprises the following steps:
according to the FDY process, after the PBT melt and the PA6 melt are distributed, FDY filaments are obtained by extrusion from spinneret orifices on the same spinneret plate, and the profiled fiber is obtained;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line;
the length ratio of the vertical line I to the vertical line II to the transverse line is 1: 2.5-3.5: 2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.5-2.0: 1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 2.5-3.5: 1;
the distribution refers to the control of the flow of PBT melt through the vertical lines I and II, while controlling the flow of PA6 melt through the horizontal lines.
The invention reasonably designs the shape and the size of the spinneret orifice, so that the fiber is twisted, and the seersucker with strong comfort when being worn is further prepared, 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 a cross-shaped spinneret orifice, the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line, the vertical line I and the vertical line II are respectively positioned at two opposite sides of the transverse line, the width of the vertical line I is greater than that of the vertical line II, the length of the vertical line I is less than that of the vertical line II, the lengths of the vertical line I and the vertical line II are greater than that of the transverse line, the vertical line I and the vertical line II are made of PBT, and the transverse line is made of PA 6;
at the contact position of the vertical line I or the vertical line II and the transverse line, two internal stresses in opposite directions exist simultaneously, the internal stress in one direction is from PA6, the internal stress in the other direction is from PBT, and the internal stresses in the two opposite directions mutually counteract to form the internal stress in a single direction;
because the lengths of the vertical line I and the vertical line II are greater than the width of the transverse line, and the internal stress of PBT is greater than PA6, the final direction of the internal stress points to the vertical line I at the position where the vertical line II is contacted with the transverse line, and the final direction of the internal stress points to the vertical line II at the position where the vertical line II is contacted with the transverse line, and because the vertical line I and the vertical line II are positioned at the opposite sides of the transverse line, the final direction of the internal stress at the position where the vertical line I is contacted with the transverse line is opposite to the final direction of the internal stress at the position where the vertical line II is contacted with the transverse line, two internal stresses with opposite directions exist on the cross section of the fiber at the same time, so that the fiber is twisted to form a twisted structure, the contact mode of the fiber with the skin can be changed along with the twisted structure, the original line contact is changed into point contact, and the contact area of the seersuck, the friction is less, and the snugness of fit is stronger, and the fibre has moisture absorption sweat-discharging performance also can promote behind the distortion structure simultaneously, and the seersucker made by it can be external with the sweat discharge more fast, and the snugness of fit is stronger, and the leading cause has two: the surface of the fiber is actively increased on the unit length after twisting, the fiber can be in contact with more water to lead out the water, and the groove on the fiber is twisted after twisting;
in addition, because the width of the vertical line I is greater than that of the vertical line II, and the length of the vertical line I is less than that of the vertical line II, the internal stress at the contact position of the vertical line I and the transverse line and the internal stress at the contact position of the vertical line II and the transverse line have certain difference, and then the cross-shaped size parameter is matched, so that the torsion angle per unit length of the fiber is ensured
Figure BDA0002349331480000021
Reach 59-172 degrees/10 mu m, and are beneficial to giving consideration to the performances of all aspects of the fiber.
As a preferable scheme:
according to the preparation method of the seersucker, the mass ratio of the PBT melt to the PA6 melt is 40: 60-45: 55.
In the preparation method of the seersucker, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt; the preparation process of the PBT-PA6 copolymer comprises the following steps: mixing PBT with a number average molecular weight of 2000-3000 and PA6 with a number average molecular weight of 2000-3000 according to a mass ratio of 1:1, and performing polycondensation reaction for 40-60 min under the conditions that the temperature is 275-280 ℃ and the vacuum degree is lower than 50 Pa.
In the preparation method of the seersucker, the parameters of the FDY process are as follows: the spinning temperature is 276-278 ℃, the cooling temperature is 20-25 ℃, the first-roller speed is 2000-2200 m/min, the first-roller temperature is 75-85 ℃, the second-roller speed is 2800-3000 m/min, the second-roller temperature is 130-140 ℃, and the winding speed is 2830-2920 m/min.
The preparation method of the seersucker 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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E;
the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the composite spinning assembly is positioned in the assembly spinning manifold.
According to the preparation method of the seersucker, the intrinsic viscosity of the PBT melt is 1.20-1.25 dL/g, the temperature of the PBT melt spinning manifold is 270-275 ℃, the intrinsic viscosity of the PA6 melt is 2.10-2.20 dL/g, the temperature of the PA6 melt spinning manifold is 280-283 ℃, and the temperature of the component spinning manifold is 276-278 ℃. The invention reasonably sets the temperature of the PA6 melt spinning manifold, the PBT melt spinning manifold and the component spinning manifold, and ensures that the apparent viscosities of the PA6 component and the PBT component extruded from the spinneret orifice are relatively close, thereby ensuring the smooth proceeding of spinning.
The preparation method of the seersucker has the temperature of the relaxation heat treatment of 90-120 ℃ and the time of 20-30 min.
According to the preparation method of the seersucker, before relaxation heat treatment, the breaking strength of the profiled fiber is more than or equal to 2.5cN/dtex, the elongation at break is 55.0 +/-2.5%, the fineness of the multifilament is 100-200 dtex, and the fineness of the monofilament is 0.7-0.9 dtex.
In the method for preparing the seersucker, the special-shaped fiber has a twisted shape and a twist angle per unit length after the relaxation heat treatment
Figure BDA0002349331480000031
59 to 172 DEG/10 μm of (
Figure BDA0002349331480000032
l is the length of the fiber section with a number of turns of 1 in μm).
In the preparation method of the seersucker, the weight of the seersucker is 100-130 g/m2The foam width is 1.30-1.50 cm, the foam density is 38-42/10 cm, and the fullness is 6.6-7.5 (the test method is the same as the literature, "summer megapeng, Mayiying, Xumei]Progress in textile technology, 2005(5):64-66. "); hygroscopicity (GB/T21655.12008): the water absorption rate is more than or equal to 280 percent, the drip diffusion time is less than or equal to 1.9 seconds, and the wicking height is more than or equal to 138 mm; quick drying (GB/T21655.12008): the evaporation rate is more than or equal to 0.35 g/h.
Has the advantages that:
(1) according to the preparation method of the profiled 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 PA6/PBT bicomponent composite fiber is improved;
(2) according to the preparation method of the profiled fiber, the temperatures of the PBT melt spinning manifold, the PA6 melt spinning manifold and the component spinning manifold are reasonably set, so that the smooth spinning of the PA6/PBT two-component composite fiber is ensured;
(3) the preparation method of the profiled fiber has the advantages of simple process, low cost and great application prospect;
(4) the profiled fiber prepared by the invention has excellent comprehensive performance;
(5) the bubble yarn prepared by the invention has strong comfort when being worn.
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 seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with a number average molecular weight of 2000 and PA6 with a number average molecular weight of 2000 according to a mass ratio of 1:1, and performing polycondensation reaction for 40min under the conditions that the temperature is 275 ℃ and the vacuum degree is 45.1 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.2dL/g) and a PA6 melt (with the intrinsic viscosity of 2.1dL/g) in a mass ratio of 40:60 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
as shown in fig. 8, the spinneret holes on the spinneret plate are ten-shaped spinneret holes, and the ten-shaped spinneret holes are composed of transverse lines and vertical lines I and II vertically connected with the transverse lines; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:2.5:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.5:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 2.5: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
the spinning adopts a composite spinning assembly, the composite spinning assembly is positioned in an assembly spinning manifold, and as shown in figures 1-7, 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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove 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 2800m/min, the second roller temperature is 130 ℃, and the winding speed is 2730 m/min;
the temperature of the PBT melt spinning manifold is 271 ℃, the temperature of the PA6 melt spinning manifold is 280 ℃, and the temperature of the component spinning manifold is 276 ℃;
the breaking strength of the prepared profiled fiber is 2.56cN/dtex, the elongation at break is 54.2%, and the filament number is 0.7 dtex;
(3) preparing the seersucker:
weaving 28s warp yarns and 50s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 90 ℃ and the time is 30 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000051
59 °/10 μm;
the gram weight of the prepared seersucker is 100g/m2The bubble width is 1.3cm, the bubble density is 38/10 cm, and the fullness is 6.6; moisture absorption: the water absorption was 308%, the drip diffusion time was 1.71 seconds, and the wicking height was 152 mm; quick drying: the evaporation rate was 0.39 g/h.
Example 2
A preparation method of seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with a number average molecular weight of 2000 and PA6 with a number average molecular weight of 2300 according to a mass ratio of 1:1, and performing polycondensation reaction for 55min under the conditions that the temperature is 279 ℃ and the vacuum degree is 46.9 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.2dL/g) and a PA6 melt (with the intrinsic viscosity of 2.1dL/g) in a mass ratio of 40:60 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:3.3:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.9:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 3.1: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 20 ℃, the speed of one roller is 2090m/min, the temperature of one roller is 85 ℃, the speed of two rollers is 2990m/min, the temperature of two rollers is 136 ℃, and the winding speed is 2920 m/min;
the temperature of the PBT melt spinning manifold is 270 ℃, the temperature of the PA6 melt spinning manifold is 280 ℃, and the temperature of the component spinning manifold is 276 ℃;
the breaking strength of the prepared profiled fiber is 2.75cN/dtex, the elongation at break is 52.5%, and the filament number is 0.79 dtex;
(3) preparing the seersucker:
weaving 31s warp yarns and 56s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 105 ℃, and the time is 25 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000061
105 °/10 μm;
the gram weight of the prepared seersucker is 111g/m2The bubble width is 1.5cm, the bubble density is 38/10 cm, and the fullness is 6.6; moisture absorption: water absorption of 305%, drip diffusion time of 1.72 seconds, wicking height of 150 mm; quick drying: the evaporation rate was 0.39 g/h.
Example 3
A preparation method of seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with a number average molecular weight of 3000 and PA6 with a number average molecular weight of 2400 according to a mass ratio of 1:1, and performing polycondensation reaction for 60min under the conditions that the temperature is 275 ℃ and the vacuum degree is 45.6 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.21dL/g) and a PA6 melt (with the intrinsic viscosity of 2.13dL/g) in a mass ratio of 45:55 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:3.2:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.9:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 3.4: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 23 ℃, the first roller speed is 2160m/min, the first roller temperature is 83 ℃, the second roller speed is 2890m/min, the second roller temperature is 137 ℃, and the winding speed is 2820 m/min;
the temperature of the PBT melt spinning box body is 273 ℃, the temperature of the PA6 melt spinning box body is 281 ℃, and the temperature of the component spinning box body is 277 ℃;
the breaking strength of the prepared profiled fiber is 2.51cN/dtex, the elongation at break is 56.6%, and the filament number is 0.75 dtex;
(3) preparing the seersucker:
weaving 31s warp yarns and 56s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 92 ℃, and the time is 29 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000071
127 °/10 μm;
the gram weight of the prepared seersucker is 112g/m2The bubble width is 1.4cm, the bubble density is 42/10 cm, and the fullness is 7.2; moisture absorption: the water absorption rate is 300%, the drip diffusion time is 1.72 seconds, and the wicking height is 150 mm; quick drying: the evaporation rate was 0.38 g/h.
Example 4
A preparation method of seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with number average molecular weight of 3000 and PA6 with number average molecular weight of 2300 according to mass ratio of 1:1, and performing polycondensation reaction for 56min at temperature of 276 ℃ and vacuum degree of 46.9 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.24dL/g) and a PA6 melt (with the intrinsic viscosity of 2.1dL/g) in a mass ratio of 40:60 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:2.8:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.7:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 2.7: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 22 ℃, the one-roll speed is 2120m/min, the one-roll temperature is 80 ℃, the two-roll speed is 2990m/min, the two-roll temperature is 138 ℃, and the winding speed is 2920 m/min;
the temperature of the PBT melt spinning manifold is 275 ℃, the temperature of the PA6 melt spinning manifold is 280 ℃, and the temperature of the component spinning manifold is 276 ℃;
the breaking strength of the prepared profiled fiber is 2.7cN/dtex, the elongation at break is 53.4%, and the filament number is 0.74 dtex;
(3) preparing the seersucker:
weaving 32s warp yarns and 60s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 102 ℃, and the time is 25 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000091
147 deg./10 μm;
the gram weight of the prepared seersucker is 112g/m2The bubble width is 1.3cm, the bubble density is 39/10 cm, and the fullness is 7.5; moisture absorption: the water absorption rate was 297%, the drip diffusion time was 1.8 seconds, and the wicking height was 145 mm; quick drying: the evaporation rate was 0.36 g/h.
Example 5
A preparation method of seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with a number average molecular weight of 3000 and PA6 with a number average molecular weight of 3000 according to a mass ratio of 1:1, and performing polycondensation reaction for 45min under the conditions that the temperature is 276 ℃ and the vacuum degree is 46.5 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.22dL/g) and a PA6 melt (with the intrinsic viscosity of 2.2dL/g) in a mass ratio of 45:55 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:2.9:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.5:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 3.3: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 22 ℃, the one-roll speed is 2200m/min, the one-roll temperature is 82 ℃, the two-roll speed is 2950m/min, the two-roll temperature is 135 ℃, and the winding speed is 2880 m/min;
the temperature of the PBT melt spinning manifold is 275 ℃, the temperature of the PA6 melt spinning manifold is 283 ℃, and the temperature of the component spinning manifold is 276 ℃;
the breaking strength of the prepared profiled fiber is 2.54cN/dtex, the elongation at break is 54.4%, and the filament number is 0.77 dtex;
(3) preparing the seersucker:
weaving 32s warp yarns and 59s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 100 ℃, and the time is 26 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000101
96 degree/10 μm;
the gram weight of the prepared seersucker is 117g/m2The bubble width is 1.3cm, the bubble density is 38/10 cm, and the fullness is 7.4; moisture absorption: the water absorption rate is 292%, the drip diffusion time is 1.8 seconds, and the wicking height is 143 mm; quick drying: the evaporation rate was 0.36 g/h.
Example 6
A preparation method of seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with number average molecular weight of 2800 and PA6 with number average molecular weight of 2700 according to a mass ratio of 1:1, and performing polycondensation reaction for 52min under the conditions that the temperature is 279 ℃ and the vacuum degree is 46.4 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.21dL/g) and a PA6 melt (with the intrinsic viscosity of 2.17dL/g) in a mass ratio of 40:60 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:2.6:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.8:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 3.2: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 21 ℃, the one-roller speed is 2170m/min, the one-roller temperature is 80 ℃, the two-roller speed is 2890m/min, the two-roller temperature is 130 ℃, and the winding speed is 2820 m/min;
the temperature of the PBT melt spinning box body is 272 ℃, the temperature of the PA6 melt spinning box body is 282 ℃, and the temperature of the component spinning box body is 276 ℃;
the breaking strength of the prepared profiled fiber is 2.5cN/dtex, the elongation at break is 57.5%, and the filament number is 0.81 dtex;
(3) preparing the seersucker:
weaving 29s warp yarns and 51s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 119 ℃, and the time is 21 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000111
169 degree/10 μm;
the gram weight of the prepared seersucker is 117g/m2The bubble width is 1.3cm, the bubble density is 41 bubbles/10 cm, and the fullness is 7; moisture absorption: the water absorption was 286%, the drip diffusion time was 1.81 seconds, and the wicking height was 141 mm; quick drying: the evaporation rate was 0.36 g/h.
Example 7
A preparation method of seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with number average molecular weight of 2300 and PA6 with number average molecular weight of 2900 at a mass ratio of 1:1, and performing polycondensation reaction for 60min at the temperature of 280 ℃ and the vacuum degree of 49.8 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.2dL/g) and a PA6 melt (with the intrinsic viscosity of 2.18dL/g) in a mass ratio of 40:60 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:3:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.5:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 2.9: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 22 ℃, the one-roll speed is 2150m/min, the one-roll temperature is 79 ℃, the two-roll speed is 2980m/min, the two-roll temperature is 135 ℃, and the winding speed is 2910 m/min;
the temperature of the PBT melt spinning box body is 272 ℃, the temperature of the PA6 melt spinning box body is 282 ℃, and the temperature of the component spinning box body is 276 ℃;
the breaking strength of the prepared profiled fiber is 2.67cN/dtex, the elongation at break is 53.5%, and the filament number is 0.88 dtex;
(3) preparing the seersucker:
weaving 30s warp yarns and 54s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 106 ℃, and the time is 24 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000121
61 DEG/10 mu m;
the gram weight of the prepared seersucker is 127g/m2The bubble width is 1.5cm, the bubble density is 40/10 cm, and the fullness is 7.2; moisture absorption: the water absorption rate was 285%, the drip diffusion time was 1.82 seconds, and the wicking height was 140 mm; quick drying: the evaporation rate was 0.35 g/h.
Example 8
A preparation method of seersucker comprises the following steps:
(1) preparation of PBT-PA6 copolymer:
mixing PBT with a number average molecular weight of 3000 and PA6 with a number average molecular weight of 3000 according to a mass ratio of 1:1, and performing polycondensation reaction for 60min under the conditions that the temperature is 280 ℃ and the vacuum degree is 49.8 Pa;
(2) preparing the foreign fiber:
according to the FDY process, after a PBT melt (with the intrinsic viscosity of 1.25dL/g) and a PA6 melt (with the intrinsic viscosity of 2.2dL/g) in a mass ratio of 40:60 are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate to obtain profiled fibers; wherein, the PA6 melt and the PBT melt respectively contain 5 wt% of PBT-PA6 copolymer melt;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line; the length ratio of the vertical line I, the vertical line II and the transverse line is 1:3.5:2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 2:1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 3.5: 1;
the distribution means that the PBT melt is controlled to flow through a vertical line I and a vertical line II, and the PA6 melt is controlled to flow through a horizontal line;
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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E; the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the first roller speed is 2200m/min, the first roller temperature is 85 ℃, the second roller speed is 3000m/min, the second roller temperature is 140 ℃, and the winding speed is 2920 m/min;
the temperature of the PBT melt spinning box body is 275 ℃, the temperature of the PA6 melt spinning box body is 283 ℃, and the temperature of the component spinning box body is 278 ℃;
the breaking strength of the prepared profiled fiber is 2.63cN/dtex, the elongation at break is 53.6%, and the filament number is 0.9 dtex;
(3) preparing the seersucker:
weaving 32s warp yarns and 60s weft yarns to obtain grey cloth, and performing relaxation heat treatment to obtain seersucker yarns;
wherein, the warp yarn is composed of cotton fiber, and the weft yarn is composed of profiled fiber; the temperature of the relaxation heat treatment is 120 ℃, and the time is 20 min;
after relaxation heat treatment, the profiled fiber has twisted shape and twist angle per unit length
Figure BDA0002349331480000131
172 DEG/10 mu m;
the gram weight of the prepared seersucker is 130g/m2The bubble width is 1.5cm, the bubble density is 42/10 cm, and the fullness is 7.5; moisture absorption: the water absorption rate was 280%, the drip diffusion time was 1.9 seconds, and the wicking height was 138 mm; quick drying: the evaporation rate was 0.35g/h。

Claims (10)

1. A preparation method of seersucker is characterized in that: weaving 28-32 s of warp yarns and 50-60 s of weft yarns to obtain gray fabric, and performing relaxation heat treatment to obtain seersucker yarns;
the warp yarns are made of cotton fibers, and the weft yarns are made of profiled fibers;
the preparation process of the profiled fiber comprises the following steps:
according to the FDY process, after the PBT melt and the PA6 melt are distributed, FDY filaments are obtained by extrusion from spinneret orifices on the same spinneret plate, and the profiled fiber is obtained;
the spinneret orifice is a cross-shaped spinneret orifice, and the cross shape consists of a transverse line, a vertical line I and a vertical line II which are vertically connected with the transverse line;
the length ratio of the vertical line I to the vertical line II to the transverse line is 1: 2.5-3.5: 2, and the intersection point of the vertical line I or the vertical line II and the transverse line is the midpoint of the transverse line; the width ratio of the vertical line I to the vertical line II is 1.5-2.0: 1, and the widths of the vertical line II and the horizontal line are the same; the ratio of the length to the width of the vertical line I is 2.5-3.5: 1;
the distribution refers to the control of the flow of PBT melt through the vertical lines I and II, while controlling the flow of PA6 melt through the horizontal lines.
2. The preparation method of the seersucker as claimed in claim 1, wherein the mass ratio of the PBT melt to the PA6 melt is 40: 60-45: 55.
3. The method of claim 2, wherein the melt of PA6 and the melt of PBT each contain 5 wt% of the melt of PBT-PA6 copolymer; the preparation process of the PBT-PA6 copolymer comprises the following steps: mixing PBT with a number average molecular weight of 2000-3000 and PA6 with a number average molecular weight of 2000-3000 according to a mass ratio of 1:1, and performing polycondensation reaction for 40-60 min under the conditions that the temperature is 225-280 ℃ and the vacuum degree is lower than 50 Pa.
4. The method as claimed in claim 3, wherein the FDY process parameters are as follows: the cooling temperature is 20-25 ℃, the first roller speed is 2000-2200 m/min, the first roller temperature is 25-85 ℃, the second roller speed is 2800-3000 m/min, the second roller temperature is 130-140 ℃, and the winding speed is 2830-2920 m/min.
5. The method for preparing seersucker according to claim 4, wherein a composite spinning assembly is adopted, which 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 flow channel A1 for the PBT melt to flow through and a flow channel B1 for the PA6 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, each group of E, F, G is connected into a cross-shaped groove, E corresponds to a transverse line, F corresponds to a vertical line I, G corresponds to a vertical line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end of F, which is far away from E, and through holes in I3 are positioned at one end of G, which is far away from E;
the guide hole of the cross-shaped spinneret orifice on the spinneret plate is communicated with the cross-shaped groove, and the orthographic projections of the guide hole and the cross-shaped groove are completely overlapped;
the composite spinning assembly is positioned in the assembly spinning manifold.
6. The preparation method of the seersucker as claimed in claim 5, wherein the intrinsic viscosity of the PBT melt is 1.20-1.25 dL/g, the temperature of the PBT melt spinning manifold is 220-225 ℃, the intrinsic viscosity of the PA6 melt is 2.10-2.20 dL/g, the temperature of the PA6 melt spinning manifold is 280-283 ℃, and the temperature of the component spinning manifold is 226-228 ℃.
7. The method for preparing seersucker according to claim 6, wherein the temperature of the relaxation heat treatment is 90-120 ℃ for 20-30 min.
8. The method for preparing seersucker according to claim 2, wherein before the relaxation heat treatment, the breaking strength of the profiled fiber is not less than 2.5cN/dtex, the elongation at break is 55.0 ± 2.5%, the fineness of the multifilament is 100-200 dtex, and the fineness of the monofilament is 0.2-0.9 dtex.
9. The method of claim 2, wherein the shaped fiber has a twisted form with a twist angle phi of 59-122 °/10 μm per unit length after the relaxation heat treatment.
10. The method as claimed in claim 1, wherein the seersucker has a weight of 100-130 g/m2The bubble width is 1.30-1.50 cm, the bubble density is 38-42/10 cm, and the fullness is 6.6-2.5; moisture absorption: the water absorption rate is more than or equal to 280 percent, the drip diffusion time is less than or equal to 1.9 seconds, and the wicking height is more than or equal to 138 mm; quick drying: the evaporation rate is more than or equal to 0.35 g/h.
CN201911408495.0A 2019-12-31 2019-12-31 Preparation method of seersucker Withdrawn CN110983572A (en)

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