CN111118623B - Cotton-like polyester fiber and preparation method thereof - Google Patents
Cotton-like polyester fiber and preparation method thereof Download PDFInfo
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- CN111118623B CN111118623B CN201911386309.8A CN201911386309A CN111118623B CN 111118623 B CN111118623 B CN 111118623B CN 201911386309 A CN201911386309 A CN 201911386309A CN 111118623 B CN111118623 B CN 111118623B
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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
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/082—Melt spinning methods of mixed yarn
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
-
- 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
- D01D5/23—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool by asymmetrical cooling of filaments, threads, or the like, leaving the spinnerettes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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- 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
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
Abstract
The invention relates to a method for preparing cotton-like polyester fiber, which comprises the steps of spinning PET according to a POY process (the spinneret orifice on a spinneret plate is circular) and an FDY process (the spinneret orifice on the spinneret plate is trilobal and is cooled by circular blowing), stranding and doubling, and then carrying out network compounding, winding forming and relaxation heat treatment to obtain the cotton-like polyester fiber; three leaves of all the trilobal spinneret orifices are in a T shape; the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the crimp shrinkage rate is 20-25%, the crimp stability is 73-75%, the shrinkage elongation is 50-53%, and the crimp elastic recovery rate is 78-82%; the breaking strength is 2.3-2.5 cN/dtex, the elongation at break is 20-30%, and the boiling water shrinkage is 3.0-4.0%.
Description
Technical Field
The invention belongs to the technical field of polyester fibers, and relates to a cotton-like polyester fiber and a preparation method thereof.
Background
Since the advent of polyethylene terephthalate (PET fiber or polyester fiber) fiber, the fiber has a series of excellent properties such as high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat and light resistance, acid and alkali resistance, corrosion resistance and the like, and the fabric has the advantages of crease resistance, non-ironing property, good stiffness and the like, and is widely applied to the fields of clothing, home textiles and the like.
The cotton-like differential shrinkage composite yarn is a filament with different potential shrinkage performances, namely a composite yarn formed by processing a high shrinkage yarn POY and a low shrinkage yarn FDY through mixed fibers, and the PET differential shrinkage mixed fiber composite yarn is mainly characterized in that: high bulkiness and soft hand. The appearance of the PET cotton-like different shrinkage composite filament is similar to that of a common filament. Due to the difference of the shrinkage rates of the two components, after heat treatment, the high shrinkage part forms a core wire with clear outline to form a framework of the wire, and the low shrinkage part forms a fine wire loop to be wound around the core wire, so that the appearance of the wire is similar to that of a deformed wire. The composite yarn has soft luster, and because of the bulkiness of the PET cotton-like different shrinkage composite yarn and a plurality of yarn loops on the surface, the aurora defect of the chemical fiber yarn fabric is eliminated. And the excellent heat retention of the composite yarn is due to the fact that the air content in the PET differential shrinkage mixed fiber composite yarn fabric is increased due to the fact that the high bulkiness is achieved, and gaps among fibers are enlarged.
Therefore, on the basis of the prior art, the research on the polyester fiber with better cotton-like effect is of great significance.
Disclosure of Invention
The invention provides a cotton-like polyester fiber and a preparation method thereof, aiming at further improving the cotton-like effect of the polyester fiber from hand feeling and luster.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for preparing cotton-like polyester fiber comprises spinning PET according to POY process and FDY process, plying and doubling, network compounding, winding to form, and relaxation heat treatment to obtain cotton-like polyester fiber;
spinneret orifices on the spinneret plate corresponding to the POY process are circular; spinneret orifices on the spinneret plate corresponding to the FDY process are trilobal; the FDY process adopts circular blowing cooling;
the three leaves of all the trilobal spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1: 1.5-2, the three leaves are the same in width, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 2.5-3.5: 1;
all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center.
As a preferred technical scheme:
according to the preparation method of the cotton-like polyester fiber, the intrinsic viscosity of PET is 0.60-0.65 dL/g.
According to the preparation method of the cotton-like polyester fiber, the parameters of the FDY process are as follows: the spinning temperature is 280-285 ℃, the cooling temperature is 20-25 ℃, the cooling air speed is 1.8-2.3 m/s, the network pressure is 3.5-4.5 bar, the first roller speed is 2500-3000 m/min, the first roller temperature is 85-95 ℃, the second roller speed is 3600-3800 m/min, the second roller temperature is 150-170 ℃, the godet speed is 3600-3800 m/min, and the winding speed is 3530-3710 m/min; the parameters of the POY process are as follows: the cooling wind speed is 0.3-0.5 m/s.
According to the preparation method of the cotton-like polyester fiber, the mass ratio of the POY yarns prepared by the POY process to the FDY yarns prepared by the FDY process is 30: 70-50: 50.
According to the preparation method of the cotton-like polyester fiber, the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
The cotton-like polyester fiber prepared by the preparation method of the cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections.
The cotton-like polyester fiber has a crimp shrinkage of 20-25%, a crimp stability of 73-75%, a shrinkage elongation of 50-53%, and a crimp elastic recovery of 78-82%.
The cotton-like polyester fiber has the breaking strength of 2.3-2.5 cN/dtex, the elongation at break of 20-30%, the boiling water shrinkage of 3.0-4.0% and the single fiber fineness of 1.5-1.7 dtex.
The principle of the invention is as follows:
the cotton-like polyester fiber is prepared by spinning according to a POY process and an FDY process and then stranding and doubling, wherein the POY process adopts a spinneret plate with a circular spinneret orifice, the FDY process adopts a spinneret plate with trilobal spinneret orifices (three leaves are in a T shape), the trilobal spinneret orifices are distributed in concentric circles, the central line of the vertical leaf of each trilobal spinneret orifice passes through the circle center and points to the circle center, and meanwhile, circular blowing is adopted for cooling; wherein, the cooling blast air is over against the vertical blade in the trefoil, and firstly faces the wind; therefore, the cooling speed of the blade is higher, so that the cooling speed of the melt on the cross section is inconsistent after the fibers are sprayed out, and the cooling speed is mainly reflected in that: when the FDY process is used for spinning, the cooling air speed is high and is between 1.8 and 2.3m/s, the part close to the air blowing opening is cooled earlier and faster, and the part far away from the air blowing opening is cooled slower. When a vertical lobe in a trilobal spinneret orifice is facing the cooling wind, the melt of that lobe cools faster while the other lobes cool slower. The cooled slow melt is more easily drawn to thin and its stress is more concentrated under the tension of the draw. Meanwhile, the fibers of the POY process are plied with the POY process, and after relaxation heat treatment, the cotton-like polyester fibers are curled, and the curling has two forms: one is that the cross-sectional stress and thickness of the FDY filament are asymmetric, so that the FDY filament presents a three-dimensional self-curling shape, and the other is that the POY filament has higher shrinkage rate due to different heat shrinkage rates of the POY filament and the FDY filament, so that the FDY filament bulges to form a filament coil in a curling shape.
In summary, compared with the composite yarn formed by POY yarn and FDY yarn in the prior art, the surface yarn loop of the cotton-like polyester fiber is formed by yarn with a trilobal cross section and a three-dimensional self-curling shape, while the prior art is formed by conventional FDY yarn (non-self-curling shape), and the gloss and the hand feeling of the yarn are completely different, and the yarn is specifically represented by: the elastic modulus of a wire loop formed by the three-dimensional self-curling wire is smaller, the external force required for deformation is smaller, and the hand feeling is softer; the curling shape and the trilobal cross section of the self-curling fiber eliminate the original aurora defect of the polyester fiber from two aspects, so the cotton-like polyester fiber has better cotton-like effect.
Has the advantages that:
(1) the invention relates to a cotton-like polyester fiber and a preparation method thereof, which adopts an FDY process and a POY process, wherein a spinneret orifice is arranged in the FDY process to be trilobal (three leaves are in a T shape) for spinning, so that a silk ring on the surface of the prepared polyester cotton-like fiber is formed by the fiber in a three-dimensional self-curling shape;
(2) according to the cotton-like polyester fiber, the FDY yarns with the three-dimensional self-curling shape and the trilobal cross sections are used as the surface loops, so that the bulkiness, the hand feeling and the glossiness of the cotton-like polyester fiber are closer to those of cotton fibers compared with those of the prior art, and the cotton-like effect is better.
Drawings
FIG. 1 is a schematic view of the trilobal spinneret orifice of the present invention;
FIG. 2 is a schematic representation of the distribution of trilobal orifices of the present invention on a spinneret.
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.
The shape of the trilobal spinneret orifice and the distribution schematic diagram of the trilobal spinneret orifice on the spinneret plate are shown in figures 1 and 2, three leaves of all the trilobal spinneret orifices are T-shaped and comprise two transverse leaves and a vertical leaf, the included angle between the central line of the vertical leaf and the central line of the two transverse leaves is 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1: 1.5-2, the width of the three leaves is the same, and the length ratio of the vertical leaf to the width is 2.5-3.5: 1; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center.
Fig. 1 and 2 are merely schematic and are not intended to limit the present invention.
Example 1
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.6dL/g) according to a POY process (spinneret orifices on a spinneret are circular) and an FDY process (spinneret orifices on the spinneret are trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:1.5:1.6, the width of the three leaves is the same, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 2.7: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 24, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.4 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 280 ℃, the cooling temperature is 20 ℃, the cooling wind speed is 2m/s, the network pressure is 3.5bar, the first roller speed is 3000m/min, the first roller temperature is 85 ℃, the second roller speed is 3640m/min, the second roller temperature is 156 ℃, the godet speed is 3640m/min, and the winding speed is 3570 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 40: 60;
(3) carrying out network compounding, winding forming and relaxation heat treatment at the temperature of 92 ℃ for 29min to obtain the cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 24%, the crimp stability of 73%, the shrinkage elongation of 52% and the crimp elastic recovery of 82%; the breaking strength of the cotton-like polyester fiber is 2.3cN/dtex, the elongation at break is 30%, the boiling water shrinkage is 3%, and the filament number is 1.5 dtex.
Example 2
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.65dL/g) according to a POY process (a spinneret orifice on a spinneret plate is circular) and an FDY process (a spinneret orifice on the spinneret plate is trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:1.5:1.5, the width of the three leaves is the same, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 3.5: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 36, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.5 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 285 ℃, the cooling temperature is 25 ℃, the cooling air speed is 2.3m/s, the network pressure is 4.5bar, the one-roller speed is 3000m/min, the one-roller temperature is 95 ℃, the two-roller speed is 3800m/min, the two-roller temperature is 170 ℃, the godet speed is 3800m/min and the winding speed is 3710 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 50: 50;
(3) carrying out network compounding, winding forming and relaxation heat treatment at 120 ℃ for 20min to obtain cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 25%, the crimp stability of 75%, the shrinkage elongation of 53% and the crimp elastic recovery of 82%; the breaking strength of the cotton-like polyester fiber is 2.3cN/dtex, the elongation at break is 29%, the boiling water shrinkage is 4%, and the filament number is 1.7 dtex.
Example 3
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.61dL/g) according to a POY process (spinneret orifices on a spinneret are circular) and an FDY process (spinneret orifices on the spinneret are trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:2:2, the three leaves have the same width, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 2.5: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 24, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.3 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 282 ℃, the cooling temperature is 21 ℃, the cooling wind speed is 2.3m/s, the network pressure is 4bar, the one-roller speed is 2820m/min, the one-roller temperature is 91 ℃, the two-roller speed is 3680m/min, the two-roller temperature is 159 ℃, the godet speed is 3680m/min, and the winding speed is 3610 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 30: 70;
(3) carrying out network compounding, winding forming and relaxation heat treatment at 104 ℃ for 28min to obtain cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 20%, the crimp stability of 74%, the shrinkage elongation of 51% and the crimp elastic recovery of 80%; the breaking strength of the cotton-like polyester fiber is 2.4cN/dtex, the elongation at break is 28%, the boiling water shrinkage is 3%, and the filament number is 1.7 dtex.
Example 4
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.62dL/g) according to a POY process (spinneret orifices on a spinneret are circular) and an FDY process (spinneret orifices on the spinneret are trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:1.5:2, the three leaves have the same width, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 3.1: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 30, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.4 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 282 ℃, the cooling temperature is 23 ℃, the cooling air speed is 2.1m/s, the network pressure is 3.8bar, the first-roller speed is 2710m/min, the first-roller temperature is 88 ℃, the two-roller speed is 3610m/min, the two-roller temperature is 167 ℃, the godet speed is 3610m/min, and the winding speed is 3540 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 40: 60;
(3) carrying out network compounding, winding and forming and relaxation heat treatment at the temperature of 110 ℃ for 28min to obtain cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 25%, the crimp stability of 74%, the shrinkage elongation of 52% and the crimp elastic recovery of 82%; the breaking strength of the cotton-like polyester fiber is 2.5cN/dtex, the elongation at break is 26%, the boiling water shrinkage is 3%, and the filament number is 1.7 dtex.
Example 5
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.65dL/g) according to a POY process (a spinneret orifice on a spinneret plate is circular) and an FDY process (a spinneret orifice on the spinneret plate is trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:2:1.5, the three leaves have the same width, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 3.1: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 42, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.5 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 283 ℃, the cooling temperature is 24 ℃, the cooling air speed is 2.2m/s, the network pressure is 4.4bar, the first-roller speed is 2810m/min, the first-roller temperature is 95 ℃, the second-roller speed is 3750m/min, the two-roller temperature is 164 ℃, the godet speed is 3750m/min, and the winding speed is 3680 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 35: 65;
(3) carrying out network compounding, winding forming and relaxation heat treatment at 112 ℃ for 24min to obtain cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 23%, the crimp stability of 74%, the shrinkage elongation of 50% and the crimp elastic recovery of 81%; the breaking strength of the cotton-like polyester fiber is 2.5cN/dtex, the elongation at break is 22%, the boiling water shrinkage is 3%, and the filament number is 1.6 dtex.
Example 6
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.63dL/g) according to a POY process (spinneret orifices on a spinneret are circular) and an FDY process (spinneret orifices on the spinneret are trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:1.7:1.7, the width of the three leaves is the same, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 2.5: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 48, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.4 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 283 ℃, the cooling temperature is 23 ℃, the cooling wind speed is 2m/s, the network pressure is 3.9bar, the one-roller speed is 2670m/min, the one-roller temperature is 93 ℃, the two-roller speed is 3700m/min, the two-roller temperature is 164 ℃, the godet speed is 3700m/min, and the winding speed is 3630 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 40: 60;
(3) carrying out network compounding, winding forming and relaxation heat treatment at the temperature of 114 ℃ for 23min to obtain cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 23%, the crimp stability of 74%, the shrinkage elongation of 51% and the crimp elastic recovery of 81%; the breaking strength of the cotton-like polyester fiber is 2.5cN/dtex, the elongation at break is 21%, the boiling water shrinkage is 3%, and the filament number is 1.6 dtex.
Example 7
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.6dL/g) according to a POY process (spinneret orifices on a spinneret are circular) and an FDY process (spinneret orifices on the spinneret are trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:1.8:2, the three leaves have the same width, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 2.5: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 36, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.3 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 280 ℃, the cooling temperature is 20 ℃, the cooling air speed is 1.8m/s, the network pressure is 3.5bar, the one-roller speed is 2500m/min, the one-roller temperature is 85 ℃, the two-roller speed is 3600m/min, the two-roller temperature is 150 ℃, the godet speed is 3600m/min, and the winding speed is 3530 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 50: 50;
(3) carrying out network compounding, winding forming and relaxation heat treatment at 90 ℃ for 30min to obtain cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 20%, the crimp stability of 73%, the shrinkage elongation of 50% and the crimp elastic recovery of 78%; the breaking strength of the cotton-like polyester fiber is 2.5cN/dtex, the elongation at break is 20%, the boiling water shrinkage is 3%, and the filament number is 1.5 dtex.
Example 8
A preparation method of cotton-like polyester fiber comprises the following steps:
(1) spinning PET (with the intrinsic viscosity of 0.62dL/g) according to a POY process (spinneret orifices on a spinneret are circular) and an FDY process (spinneret orifices on the spinneret are trilobal) respectively; wherein, the three leaves of all the three-leaf spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are both 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1:1.5:1.8, the width of the three leaves is the same, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 2.9: 1; all the trilobal spinneret orifices are distributed in concentric circles (the number of the spinneret orifices is 42, and the trilobal spinneret orifices are distributed in a circle at equal intervals), and the central line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the POY process are as follows: the cooling wind speed is 0.3 m/s;
the FDY process adopts circular blowing cooling, and the parameters of the FDY process are as follows: the spinning temperature is 282 ℃, the cooling temperature is 22 ℃, the cooling wind speed is 2m/s, the network pressure is 4.5bar, the one-roller speed is 2580m/min, the one-roller temperature is 86 ℃, the two-roller speed is 3780m/min, the two-roller temperature is 151 ℃, the godet speed is 3780m/min, and the winding speed is 3710 m/min;
(2) the POY yarn prepared by the POY process and the FDY yarn prepared by the FDY process are stranded and doubled according to the mass ratio of 30: 70;
(3) carrying out network compounding, winding forming and relaxation heat treatment at 115 ℃ for 22min to obtain cotton-like polyester fiber;
the prepared cotton-like polyester fiber has a three-dimensional crimp shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cotton-like polyester fiber has the crimp shrinkage of 20%, the crimp stability of 75%, the shrinkage elongation of 50% and the crimp elastic recovery of 80%; the breaking strength of the cotton-like polyester fiber is 2.5cN/dtex, the elongation at break is 20%, the boiling water shrinkage is 4%, and the filament number is 1.5 dtex.
Claims (7)
1. A preparation method of cotton-like polyester fiber is characterized by comprising the following steps: spinning PET according to a POY process and an FDY process respectively, then plying and doubling, and then carrying out network compounding, winding forming and relaxation heat treatment to obtain cotton-like polyester fibers;
spinneret orifices on the spinneret plate corresponding to the POY process are circular; spinneret orifices on the spinneret plate corresponding to the FDY process are trilobal; the FDY process adopts circular blowing cooling; cooling wind speed is 1.8-2.3 m/s;
the three leaves of all the trilobal spinneret orifices are T-shaped and consist of two transverse leaves and a vertical leaf, the included angles between the central lines of the vertical leaf and the two transverse leaves are 90 degrees, the length ratio of the vertical leaf to the two transverse leaves is 1: 1.5-2, the three leaves are the same in width, and the ratio of the length of the vertical leaf to the width of the vertical leaf is 2.5-3.5: 1;
all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the vertical blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the cotton-like polyester fiber has a three-dimensional curling shape and consists of a plurality of PET FDY monofilaments with trilobal cross sections and a plurality of PET POY monofilaments with circular cross sections; the cross-sectional stress and thickness of the FDY monofilament are asymmetric and exhibit a three-dimensional self-curled morphology.
2. The method for preparing cotton-like polyester fiber according to claim 1, wherein the intrinsic viscosity of PET is 0.60-0.65 dL/g.
3. The preparation method of the cotton-like polyester fiber according to claim 2, wherein the parameters of the FDY process are as follows: the spinning temperature is 280-285 ℃, the cooling temperature is 20-25 ℃, the network pressure is 3.5-4.5 bar, the one-roller speed is 2500-3000 m/min, the one-roller temperature is 85-95 ℃, the two-roller speed is 3600-3800 m/min, the two-roller temperature is 150-170 ℃, the godet speed is 3600-3800 m/min, and the winding speed is 3530-3710 m/min; the parameters of the POY process are as follows: the cooling wind speed is 0.3-0.5 m/s.
4. The preparation method of the cotton-like polyester fiber according to claim 1, wherein the mass ratio of the POY yarn prepared by the POY process to the FDY yarn prepared by the FDY process is 30: 70-50: 50.
5. The preparation method of the cotton-like polyester fiber according to claim 1, wherein the temperature of the relaxation heat treatment is 90-120 ℃ for 20-30 min.
6. The method for preparing the cotton-like polyester fiber according to claim 1, wherein the cotton-like polyester fiber has a crimp shrinkage of 20-25%, a crimp stability of 73-75%, a shrinkage elongation of 50-53%, and a crimp elastic recovery of 78-82%.
7. The method for preparing the cotton-like polyester fiber according to claim 1, wherein the cotton-like polyester fiber has a breaking strength of 2.3 to 2.5cN/dtex, an elongation at break of 20 to 30%, a boiling water shrinkage of 3.0 to 4.0%, and a single fiber fineness of 1.5 to 1.7 dtex.
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| CN201911386309.8A CN111118623B (en) | 2019-12-29 | 2019-12-29 | Cotton-like polyester fiber and preparation method thereof |
| JP2022539758A JP7250220B2 (en) | 2019-12-29 | 2020-06-12 | Pseudo-cotton polyester fiber and method for producing the same |
| KR1020217039347A KR102503290B1 (en) | 2019-12-29 | 2020-06-12 | Cotton polyester fiber and manufacturing method thereof |
| PCT/CN2020/095713 WO2021135083A1 (en) | 2019-12-29 | 2020-06-12 | Cotton-like polyester fiber and preparation method therefor |
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| CN114108111B (en) * | 2020-08-27 | 2022-11-25 | 中国石油化工股份有限公司 | Cotton-like polyester staple fiber and preparation method thereof |
| CN114687035A (en) * | 2020-12-25 | 2022-07-01 | 上海重纤技术有限公司 | Cotton-like polyester fiber and preparation method thereof |
| CN114232161A (en) * | 2021-12-24 | 2022-03-25 | 江苏恒力化纤股份有限公司 | Preparation method of POY/FDY polyester composite yarn |
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| JP7250220B2 (en) | 2023-03-31 |
| WO2021135083A1 (en) | 2021-07-08 |
| CN111118623A (en) | 2020-05-08 |
| JP2022552443A (en) | 2022-12-15 |
| KR20220021479A (en) | 2022-02-22 |
| KR102503290B1 (en) | 2023-02-23 |
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