CN111118712A - Imitated silk elastic knitted underwear fabric and preparation method thereof - Google Patents

Imitated silk elastic knitted underwear fabric and preparation method thereof Download PDF

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Publication number
CN111118712A
CN111118712A CN201911350193.2A CN201911350193A CN111118712A CN 111118712 A CN111118712 A CN 111118712A CN 201911350193 A CN201911350193 A CN 201911350193A CN 111118712 A CN111118712 A CN 111118712A
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silk
elastic
pet
fibers
underwear fabric
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CN111118712B (en
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王山水
范红卫
尹立新
汤方明
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Jiangsu Hengli Chemical Fiber Co Ltd
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Jiangsu Hengli Chemical Fiber Co Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • 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
    • D01D5/32—Side-by-side structure; 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D01F1/103—Agents inhibiting growth of microorganisms
    • 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
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
    • 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
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
    • D02G1/205—After-treatments for fixing crimp or curl
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • D04B1/18—Other fabrics or articles characterised primarily by the use of particular thread materials elastic threads
    • D04B1/20—Other fabrics or articles characterised primarily by the use of particular thread materials elastic threads crimped threads
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • D06M15/647—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain containing polyether sequences
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres
    • D06M2101/04—Vegetal fibres
    • D06M2101/06—Vegetal fibres cellulosic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/32—Polyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/50—Modified hand or grip properties; Softening compositions
    • 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
    • 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]
    • 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
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/062—Load-responsive characteristics stiff, shape retention
    • 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
    • D10B2401/00—Physical properties
    • D10B2401/13—Physical properties anti-allergenic or anti-bacterial
    • 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
    • D10B2401/00—Physical properties
    • D10B2401/20—Physical properties optical

Abstract

The invention relates to a silk-like elastic knitted underwear fabric and a preparation method thereof, wherein mercerized cotton fibers and silk-like PET fibers are used as face yarn raw materials, self-curling elastic fibers are used as intermediate yarn raw materials, antibacterial Wang-shaped PET fibers are used as ground yarn raw materials, and three-line plating knitting and soft finishing are carried out to prepare the silk-like elastic knitted underwear fabric; the preparation process of the self-crimping elastic fiber comprises the following steps: splitting the PET melt into two paths: one path is directly extruded (flows through a spinneret orifice m) after being distributed, the other path is extruded (flows through a spinneret orifice n) after being distributed together with the PTT melt in a parallel composite spinning mode, the number ratio of the spinneret orifices m to n is 1: 5-10, and the PTT melt is prepared according to a specific process after being extruded; the produced silk-like elastic knitted underwear fabric has a three-thread plaited structure, and the intermediate yarn is composed of self-curling elastic fibers. The silk-like elastic knitted underwear fabric has silk-like luster, and has antibacterial property, softness, moisture absorption and sweat releasing performance.

Description

Imitated silk elastic knitted underwear fabric and preparation method thereof
Technical Field
The invention belongs to the technical field of knitted fabrics, and relates to a silk-like elastic knitted underwear fabric and a preparation method thereof.
Background
Real silk is called 'queen' in textiles, and has the characteristics of beauty, lightness, softness and smoothness. The real silk has good moisture permeability, and even if the real silk sweats in summer, the real silk underwear can also play the roles of moisture absorption and ventilation. The real silk clothes are contacted with the skin, but do not cause discomfort, and on the contrary, the real silk clothes can also generate the massage effect on the skin through the activity of the human body and enhance the activity of epidermal cells. In the market, because the real silk fabric is expensive and is basically replaced by the imitated silk fabric, the development of the imitated silk fabric has practical significance.
In order to obtain the elastic property similar to that of silk fabrics, the silk-like elastic knitted underwear fabrics in the prior art usually contain spandex, so that the silk-like elastic knitted underwear fabrics have the advantages of soft and smooth hand feeling, good elasticity, comfortable wearing and body fitting, but the spandex also brings some serious problems to the fabrics: poor heat resistance, severe degradation after heat treatment, chlorine resistance, water washing resistance and poor dimensional stability after water washing.
Therefore, the development of the spandex-free imitated silk elastic knitted underwear fabric has very important significance.
Disclosure of Invention
The invention provides a silk-like elastic knitted underwear fabric and a preparation method thereof, and aims to solve the problems of poor heat resistance and poor water washing resistance of the silk-like elastic knitted underwear fabric in the prior art due to the fact that spandex is contained. The silk-like elastic knitted underwear fabric is knitted by adopting a three-thread plating process and is prepared by soft finishing, and the silk-like elastic knitted underwear fabric has elasticity equivalent to that of a real silk fabric due to the fact that self-curling elastic fibers are used as intermediate yarn raw materials; the silk-like elastic knitted underwear fabric does not contain spandex, so that the problems of poor heat resistance and poor water washing resistance caused by the fact that the silk-like elastic knitted underwear fabric in the prior art contains spandex are solved.
In order to achieve the purpose, the invention adopts the following scheme:
a preparation method of a silk-like elastic knitted underwear fabric comprises the steps of carrying out three-line plaiting weaving and soft finishing on mercerized cotton fibers and silk-like PET fibers serving as surface yarn raw materials, self-curling elastic fibers serving as intermediate yarn raw materials and antibacterial Wang-shaped PET fibers serving as ground yarn raw materials to obtain the silk-like elastic knitted underwear fabric;
the preparation process of the self-crimping elastic fiber comprises the following steps:
extruding the self-curling elastic fiber on the same spinneret plate;
splitting the PET melt into two paths: one path is directly extruded after being distributed; the other path is distributed together with the PTT melt according to a parallel composite spinning mode and then extruded;
on the same spinneret plate, the number ratio of the spinneret orifices m of the direct extrusion flow to the spinneret orifices n of the extrusion flow after being distributed in the parallel composite spinning mode is 1: 5-10;
and preparing POY (pre-oriented yarn) yarns according to a POY (pre-oriented yarn) process after extrusion, preparing the POY yarns through a DT (draw) process (comprising the heating procedures of a hot roller and a hot plate box) to prepare DT yarns, and then performing relaxation heat treatment to obtain the self-crimping elastic fibers.
The principle of the invention is as follows:
the silk-like elastic knitted underwear fabric is prepared by knitting through a three-line plating process, the face yarn raw materials are mercerized cotton fibers and silk-like PET fibers, the mercerized cotton is woven by cotton yarns processed through special processes such as singeing and mercerizing, the mercerized cotton is bright in color and luster, has silk-like luster, good flexibility and good moisture absorption performance, and is not easy to pilling, the silk-like PET fibers are prepared by adopting the method in the patent application CN201811615717.1, namely, the triangular bright fine denier modified polyester POY fibers and the triangular bright fine denier modified polyester FDY fibers are combined and wound to be prepared, and the silk-like luster is silk-like, so that the silk-like elastic knitted underwear fabric can be endowed with silk-like luster, good softness and moisture absorption performance through the mercerized cotton fibers and the silk-like PET fibers; the ground yarn raw material is antibacterial Polyester (PET) fiber in a Chinese character 'wang' shape, so that the silk-like elastic knitted underwear fabric can have excellent moisture absorption and sweat releasing performance and antibacterial performance, and has additional performance which is not possessed by common silk fabrics; the middle yarn is made of self-curling elastic fibers, the self-curling fibers are PTT/PET parallel double-component composite fibers, the self-curling fibers have self-curling performance, the curling has the characteristics of lasting stability, good elasticity and the like, and the fabric can be endowed with better elasticity, fluffiness and coverage; the imitated silk elastic knitted underwear fabric does not contain spandex, so that the defects that the imitated silk elastic knitted underwear fabric in the prior art is seriously degraded after heat treatment and poor in size stability after washing due to the existence of the spandex are overcome.
The invention uses self-curling PTT/PET side-by-side double-component composite fiber as the raw material of the intermediate yarn to prepare the silk-like elastic knitted underwear fabric, so that the silk-like elastic knitted underwear fabric has good elasticity, softness and comfort without spandex, and mainly because the two components in the PTT/PET side-by-side double-component composite fiber are arranged in parallel and have different shrinkage performances, the fiber can form a fine and dense curling shape under the action of internal stress after heat treatment, thereby obtaining good elasticity and fluffiness, namely the so-called self-curling effect of the fiber. The presence of this self-curling effect makes possible the permanence of the composite fiber curl. In addition, the good compatibility and performance complementation of the PTT and PET are utilized to develop the two-component composite fiber, so that the excellent characteristics of the PTT and PET fibers are fully exerted, the hand feeling is softer than that of the polyester textured yarn, and the elastic recovery rate is better than that of the PTT and PET fibers.
The three-dimensional spiral curling of the PTT/PET fiber ensures that the PTT/PET fiber can be straightened under the stretching action of external force and can be well restored to the original curling shape when the external force action is removed. Research shows that in a bundle of PTT/PET filaments, the appearance crimp shape of the PTT/PET filaments simultaneously has relatively orderly left and right spiral yarn sections and random crimp yarn sections, and the length and the arrangement of the yarn sections are random as a whole. Due to the difference of fiber inclination state and mechanical response behavior, when a double-component PTT/PET fiber woven fabric (such as a silk-like elastic knitted underwear fabric) is used, the difference of yarn reflection effect and tension unevenness is caused, protrusions or depressions are randomly formed on the surface of the fabric, and uneven transverse stripes with randomly changed brightness and darkness, namely uneven striped shape, are found when the appearance is observed.
In the preparation process of the self-crimping elastic fiber, a mode of replacing a part of PTT/PET parallel composite fibers with PET fibers is adopted, and the shrinkage modes and forms of the PET fibers and the PTT/PET parallel composite fibers are different, so that the neat left and right spiral forms formed by the pure PTT/PET parallel composite fibers are broken, and the problem of uneven strip shade of the silk-like elastic knitted underwear fabric prepared from the PTT/PET parallel composite fibers is solved.
Specifically, the PET melt is divided into two paths, one path is directly extruded after being distributed, and the other path and the PTT melt are extruded after being distributed in a parallel composite spinning mode, so that the replacement is realized. The mixed filament yarn composed of the PET monofilament and the PTT/PET parallel composite monofilament is equivalent to the mixed filament yarn composed of the PET monofilament and the PTT/PET parallel composite monofilament that replaces the PTT/PET parallel composite monofilament with partial PET monofilament, thereby breaking the neat left and right spiral form of the pure PTT/PET double-component fiber; in the same mixed filament bundle, the number ratio of PET monofilaments (corresponding to the spinneret orifices m) to PTT/PET parallel composite monofilaments (corresponding to the spinneret orifices n) is 1: 5-10, the PET monofilaments have the function of breaking and forming a neat left and right spiral form, the PTT/PET parallel composite monofilaments have the function of providing elasticity for the mixed filament bundle through self-curling, the elasticity of the mixed filament bundle cannot be well reflected due to too many PET monofilaments, the effect of breaking and forming the neat left and right spiral form cannot be achieved due to too few PET monofilaments, the PET monofilaments and the PTT/PET parallel composite monofilaments are mixed according to a specific ratio, the elasticity of the mixed filament bundle is ensured, the neat left and right spiral form formed by the PTT/PET parallel composite monofilaments is broken, the curling form of each PTT/PET parallel composite monofilament is different from other fibers, and strip shade unevenness is eliminated.
As a preferred technical scheme:
according to the preparation method of the imitated silk elastic knitted underwear fabric, the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1; the mass ratio of the mercerized cotton fibers to the imitated silk PET fibers is 3-4: 2-4; the antibacterial Wang-shaped PET fiber is prepared by blending PET and a nano-silver antibacterial agent and then spinning by adopting a Wang-shaped spinneret plate, and the antibacterial Wang-shaped PET fiber consists of Wang-shaped PET fibers and nano-silver dispersed in the Wang-shaped PET fibers; the silk-like PET fibers, the self-curling elastic fibers and the antibacterial Wang-shaped PET fibers are filaments; the soft finishing adopts block modified organic silicon resin with the solid content of 30-40% and the stock solution viscosity of 25-35 ten thousand cps, and the block modified organic silicon resin is an organic silicon-polyether-amino ternary copolymer block straight-chain high molecular compound.
According to the preparation method of the silk-like elastic knitted underwear fabric, the mass ratio of the PET melt passing through the spinneret hole n to the PTT melt is 50:50, and the ratio of the equivalent diameter of the spinneret hole m to the equivalent diameter of the spinneret hole n is 1: 1.
According to the preparation method of the silk-like elastic knitted underwear fabric, the spinneret holes m are circular, oval, triangular, Y-shaped, cross-shaped, 8-shaped, rectangular or straight spinneret holes, and the spinneret holes n are circular, oval or 8-shaped spinneret holes.
According to the preparation method of the silk-like elastic knitted underwear fabric, all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the outermost circle are n, so that the PET monofilaments are mixed into the middle of the PTT/PET parallel composite monofilaments, and the effect of forming a neat left and right spiral shape is achieved; otherwise, more PET monofilaments are distributed at the outermost circle, so that the inner PTT/PET parallel composite monofilaments still have regular left and right spiral forms, the problem of uneven strip shade cannot be effectively solved, and the performance of the PTT/PET parallel composite fibers is also poor.
According to the preparation method of the silk-like elastic knitted underwear fabric, the parameters of the POY process are as follows: the cooling temperature is 23-25 ℃, and the winding speed is 2500-2800 m/min; the parameters of the DT stretching process are as follows: the temperature of the hot plate is 85-95 ℃, the temperature of the hot plate is 120-130 ℃, and the multiple is 1.6-2.0; the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
According to the preparation method of the silk-like elastic knitted underwear fabric, the spinneret hole m is composed of the guide hole E, the transition hole and the capillary micro hole which are connected in sequence, the spinneret hole n is composed of the guide hole D, the transition hole and the capillary micro hole which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; and the shunting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PTT melt to the distribution hole C through the spinning beam II.
According to the preparation method of the imitated silk elastic knitted underwear fabric, the intrinsic viscosity of a PET melt is 0.50-0.58 dL/g, the temperature of a spinning box I is 275-280 ℃, the intrinsic viscosity of a PTT melt is 1.10-1.20 dL/g, the temperature of a spinning box II is 260-265 ℃, and the temperature of a spinning box III is 273-276 ℃ (the temperature of the spinning box III is the spinning temperature). In order to ensure the smooth spinning, it is necessary to ensure the same flow state when the two components are extruded from the same spinneret orifice, i.e. the apparent viscosity of the melt is close (for the same polymer, the greater the apparent viscosity, the poorer the flow property); the apparent viscosities of PET and PTT can be adjusted through temperature, the invention can be matched with the intrinsic viscosities (0.50-0.58 dL/g) of PET melt and the intrinsic viscosities (1.10-1.20 dL/g) of PTT melt through reasonably setting the temperatures of a spinning box I, a spinning box II and a spinning box III, the PET adopts high-temperature melting and low-temperature spinning, and the PTT adopts low-temperature melting and high-temperature spinning, so that the degradation of the PTT can be reduced.
The invention also provides the silk-like elastic knitted underwear fabric prepared by the preparation method of the silk-like elastic knitted underwear fabric, which has a three-thread plated texture, wherein the intermediate yarn is composed of self-curling elastic fibers, and the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments; the random distribution of the crimp direction of the monofilaments in the self-crimping elastic fiber is a mathematical concept, i.e., the crimp form of each fiber is different from that of other fibers, so that the prepared fabric has no strip shade unevenness.
As a preferred technical scheme:
the silk-like elastic knitted underwear fabric has the advantages that the self-curling elastic fibers have the curling shrinkage rate of 66-70%, the curling stability of 92.3-94.5%, the contraction elongation of 110-115% and the curling elastic recovery rate of 80-85%; the composite fiber obtained by the POY-DT process (post-stretching process) has high crimp shrinkage, crimp stability, shrinkage elongation and crimp elastic recovery.
The self-curling elastic fiber has breaking strength not less than 3.0cN/dtex, elongation at break of 45.0 +/-4.5%, and total titer of 75 to E150 dtex; under the same conditions, the breaking strength of the composite fiber obtained by the POY-DT process is higher than that of the fiber obtained by the FDY process, and the breaking elongation is lower than that of the FDY fiber, because: the drawing process of FDY is that drawing directly on the spinning line, only hot-roll heating in the drawing process, and POY-DT fiber is drawn and obtained after POY (pre-oriented yarn), in the drawing process, through hot-roll and hot plate/hot box heating, therefore the crystallinity and orientation degree of the composite fiber obtained by POY-DT process are higher, thus breaking strength is high and breaking elongation is low; the gram weight of the imitated silk elastic knitted underwear fabric is 160-200 g/m2The washing size change rate of the warp direction and the weft direction is between-1.0% and 1.0%, the antibacterial rate of staphylococcus aureus is more than or equal to 85.3%, the antibacterial rate of escherichia coli is more than or equal to 82.5%, the antibacterial rate of candida albicans is more than or equal to 78.6%, the antibacterial rate data is obtained by testing according to the FZ/T730232006(AAA) standard, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric is measured to be 0.22-0.26 according to the KES FB4 standard, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric is measured to be more than or equal to 230% according to GB/T21655.12008, the dripping diffusion time is less than or equal to 2.5 seconds, the water absorption wicking height is more than or equal to 125mm, the evaporation rate is more than or equal to 0.26g/h, and the moisture permeability2·d)。
And (3) testing the uneven condition of the shade of the prepared silk-like elastic knitted underwear fabric, wherein the testing process comprises the following steps: firstly, acquiring a fabric image of the knitted underwear and converting the fabric image into a gray image, then carrying out first processing and second processing on the gray image and then calculating a parameter D, and representing the uneven degree of the shade of the strips by using the parameter D, wherein the gray image comprises a shade area, a high gray value area of a non-shade area and a low gray value area of the non-shade area; the first processing is to change the pixel points of the high gray value area of the non-strip shadow area in the gray image into pure white points; the second processing is to change the pixel points of the low gray value area of the non-shadow area in the gray image into pure white points; the calculation formula of the parameter D is as follows: d ═ Σ B/a, where Σ B represents the number of pixels having a gray scale value of 0 in the grayscale image, and a represents the total number of pixels in the grayscale image.
If the D value is more than or equal to 3%, the strip shade unevenness can be judged to appear, and if the D value is more than or equal to 10%, the strip shade unevenness can be judged to appear seriously. The result of the test of the silk-like elastic knitted underwear fabric of the invention is as follows: the D value of the imitated silk elastic knitted underwear fabric is less than or equal to 1.0 percent; the problem of uneven stripe shade of the silk-like elastic knitted underwear fabric prepared by the invention is solved.
Has the advantages that:
(1) the preparation method of the imitated silk elastic knitted underwear fabric adopts a three-line plating process for weaving and is prepared by soft finishing, and the raw material does not contain spandex, so that the defects that the imitated silk elastic knitted underwear fabric in the prior art is seriously degraded after heat treatment and poor in size stability after washing due to the existence of spandex are overcome;
(2) the silk-like elastic knitted underwear fabric has silk-like luster, better softness, moisture absorption and sweat discharge performance and excellent antibacterial performance, and the application field of the fabric is expanded;
(2) according to the silk-like elastic knitted underwear fabric, the intermediate yarn raw material adopts the self-curling elastic fibers, the self-curling elastic fibers consist of PET fibers and PTT/PET parallel composite fibers, and due to the fact that the shrinkage modes and the forms of the PET fibers and the PTT/PET parallel composite fibers are different, the situation that pure PTT/PET parallel composite fibers form neat left and right spiral forms is broken, and therefore the problem that strips of the PTT/PET parallel composite fibers are uneven in the silk-like elastic knitted underwear fabric is solved.
Drawings
FIG. 1 is a schematic view of the melt distribution of the present invention;
wherein A, B and C are independent dispensing holes, and D and E are independent guide holes.
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 crimp shrinkage and crimp stability of the invention are obtained by testing the tow in GB6506-2001 synthetic fiber textured yarn crimp performance test method;
the method for testing the shrinkage elongation (reflecting the elasticity and the crimp degree of the deformed filament, the fiber is firstly loaded under light load and then loaded under heavy load, and the ratio of the length difference value under the two loads to the crimp length) and the crimp elastic recovery rate is as follows:
firstly, cutting two fiber samples with the length of about 50cm, putting the two fiber samples into hot water with the temperature of 100 ℃ for treatment for 30min, taking out the two fiber samples, naturally drying the two fiber samples, then cutting the sample with the length of about 30cm, fixing one end of the sample, loading a load of 0.0018cN/dtex on the other end of the sample, continuing for 30s, marking the sample at the position of 20cm, and obtaining the initial length l of the sample1(ii) a Then, the load of 0.09cN/dtex is loaded for 30s, and the position of the mark point is measured, namely the length l when the sample is loaded with heavy load2(ii) a Finally, removing the heavy load, retracting the sample for 2min without load, then adding the load of 0.0018cN/dtex, continuing for 30s, and measuring the position of the mark point on the scale, namely the recovery length l3(ii) a The percent elongation at Compression (CE) and the elastic recovery from crimp (SR) are calculated as follows:
CE＝(l2-l1)/l1；
SR＝(l2-l3)/(l2-l1)。
example 1
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.57dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.17dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the circular spinneret orifices m which directly extrude and flow through to the circular spinneret orifices n which extrude and flow through after being distributed in the parallel composite spinning mode is 1:6, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
as shown in fig. 1, the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning manifold I is 276 ℃, the temperature of the spinning manifold II is 260 ℃, and the temperature of the spinning manifold III is 275 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 24 ℃, and the winding speed is 2580 m/min; the parameters of the DT stretching process are as follows: the temperature of a hot plate is 85 ℃, the temperature of a hot plate is 120 ℃, and the multiple is 1.6; the temperature of the relaxation heat treatment is 109 ℃, and the time is 26 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 3:2, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp contraction rate of 69%, a crimp stability of 94%, a shrinkage elongation of 111%, and a crimp elastic recovery of 83%; the breaking strength of the self-curling elastic fiber is 3.2cN/dtex, the elongation at break is 46.5 percent, and the total titer is 130 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with the solid content of 30 percent and the stock solution viscosity of 25 ten thousand cps, and the block modified organic silicon resin is organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 160g/m2The washing dimension change rate of the warp direction is-1%, the washing dimension change rate of the weft direction is-1%, the antibacterial rate to staphylococcus aureus is 85.3%, the antibacterial rate to escherichia coli is 82.5%, the antibacterial rate to candida albicans is 78.6%, the kinetic friction coefficient of the silk-like elastic knitted underwear fabric is 0.22 measured according to the KES FB4 standard, the water absorption rate of the silk-like elastic knitted underwear fabric is 230%, the drip diffusion time is 2.5 seconds, the wicking height is 128mm, the evaporation rate is 0.26g/h, and the moisture transmission capacity is 115000g/(m mm) g/h2·d)。
Example 2
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.58dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.15dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the oval spinneret orifices m which directly extrude and flow through to the oval spinneret orifices n which extrude and flow through after being distributed in the parallel composite spinning mode is 1:10, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning manifold I is 280 ℃, the temperature of the spinning manifold II is 265 ℃ and the temperature of the spinning manifold III is 273 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 25 ℃, and the winding speed is 2550 m/min; the parameters of the DT stretching process are as follows: the hot plate temperature is 85 ℃, the hot plate temperature is 124 ℃, and the multiple is 1.8; the temperature of the relaxation heat treatment is 115 ℃, and the time is 22 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 4:2, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp shrinkage of 66%, a crimp stability of 93%, a shrinkage elongation of 112%, and a crimp elastic recovery of 84%; the breaking strength of the self-curling elastic fiber is 3.1cN/dtex, the elongation at break is 48.3 percent, and the total titer is 115 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with the solid content of 32 percent and the stock solution viscosity of 25.6 ten thousand cps, and the block modified organic silicon resin is organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 170g/m2The washing dimension change rate of the warp direction is-0.8 percent, the washing dimension change rate of the weft direction is-0.6 percent, the antibacterial rate to staphylococcus aureus is 85.5 percent, the antibacterial rate to escherichia coli is 83.4 percent, the antibacterial rate to candida albicans is 78.8 percent, the kinetic friction coefficient of the silk-like elastic knitted underwear fabric is 0.23 measured according to the KES FB4 standard, the water absorption rate of the silk-like elastic knitted underwear fabric is 248 percent, the drip diffusion time is 2.4 seconds, the wicking height is 133mm, the evaporation rate is 0.3g/h, the moisture permeability is 118000 g/(m) g/h2·d)。
Example 3
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.55dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.2dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the triangular spinneret orifices m which directly extrude and flow through to the 8-shaped spinneret orifices n which extrude and flow through after being distributed in the parallel composite spinning mode is 1:5, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning manifold I is 278 ℃, the temperature of the spinning manifold II is 264 ℃, and the temperature of the spinning manifold III is 275 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 24 ℃, and the winding speed is 2640 m/min; the parameters of the DT stretching process are as follows: the hot plate temperature is 88 ℃, the hot plate temperature is 126 ℃, and the multiple is 1.8; the temperature of the relaxation heat treatment is 120 ℃, and the time is 20 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 3:4, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp contraction rate of 69%, a crimp stability of 93.8%, a shrinkage elongation of 113%, and a crimp elastic recovery of 84%; the breaking strength of the self-curling elastic fiber is 3.3cN/dtex, the elongation at break is 49.2 percent, and the total titer is 125 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with the solid content of 35 percent and the stock solution viscosity of 28 ten thousand cps, and the block modified organic silicon resin is an organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 166g/m2Dimensional change of washing in warp directionThe rate is-0.2%, the washing size change rate of the weft direction is 0.2%, the antibacterial rate to staphylococcus aureus is 96.5%, the antibacterial rate to escherichia coli is 91%, the antibacterial rate to candida albicans is 89.2%, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric measured according to the KES FB4 standard is 0.26, the water absorption rate of the silk-like elastic knitted underwear fabric is 257%, the drip diffusion time is 2.4 seconds, the wicking height is 138mm, the evaporation rate is 0.31g/h, and the moisture permeability is 127200g/(m g/h)2·d)。
Example 4
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.5dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.14dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the directly extruded flowing Y-shaped spinneret orifices m to the extruded flowing circular spinneret orifices n distributed in the parallel composite spinning mode is 1:6, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning manifold I is 277 ℃, the temperature of the spinning manifold II is 265 ℃, and the temperature of the spinning manifold III is 276 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 24 ℃, and the winding speed is 2670 m/min; the parameters of the DT stretching process are as follows: the temperature of a hot plate is 88 ℃, the temperature of a hot plate is 123 ℃, and the multiple is 2; the temperature of the relaxation heat treatment is 115 ℃, and the time is 24 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 4:4, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp shrinkage of 67%, a crimp stability of 93.7%, a shrinkage elongation of 110%, and a crimp elastic recovery of 80%; the breaking strength of the self-curling elastic fiber is 3cN/dtex, the elongation at break is 40.5 percent, and the total titer is 105 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with the solid content of 36 percent and the stock solution viscosity of 29 ten thousand cps, and the block modified organic silicon resin is an organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 185g/m2The washing size change rate of the warp direction is 0.1 percent, the washing size change rate of the weft direction is-0.5 percent, the antibacterial rate to staphylococcus aureus is 87.7 percent, the antibacterial rate to escherichia coli is 85.7 percent, the antibacterial rate to candida albicans is 80.8 percent, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric is 0.24 measured according to the KES FB4 standard, and the absorption coefficient of the silk-like elastic knitted underwear fabric isThe water rate is 260%, the drip diffusion time is 2.3 seconds, the wicking height is 132mm, the evaporation rate is 0.33g/h, and the moisture permeability is 128000 g/(m)2·d)。
Example 5
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.55dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.16dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the cross spinneret orifices m which directly extrude and flow through to the oval spinneret orifices n which extrude and flow through after being distributed in the parallel composite spinning mode is 1:5, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning beam I is 279 ℃, the temperature of the spinning beam II is 262 ℃, and the temperature of the spinning beam III is 274 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 23 ℃, and the winding speed is 2700 m/min; the parameters of the DT stretching process are as follows: the hot plate temperature is 87 ℃, the hot plate temperature is 128 ℃, and the multiple is 1.7; the temperature of the relaxation heat treatment is 105 ℃, and the time is 27 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 3:2, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp shrinkage of 67%, a crimp stability of 94.2%, a shrinkage elongation of 113%, and a crimp elastic recovery of 85%; the breaking strength of the self-curling elastic fiber is 3.2cN/dtex, the elongation at break is 47.5 percent, and the total titer is 75 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with the solid content of 38 percent and the stock solution viscosity of 30 ten thousand cps, and the block modified organic silicon resin is organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 190g/m2The washing dimension change rate of the warp direction is 0.5 percent, the washing dimension change rate of the weft direction is 0.3 percent, the antibacterial rate to staphylococcus aureus is 89.4 percent, the antibacterial rate to escherichia coli is 86.2 percent, the antibacterial rate to candida albicans is 81.3 percent, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric is 0.23 measured according to the KES FB4 standard, the water absorption rate of the silk-like elastic knitted underwear fabric is 268 percent, the dripping diffusion time is 2.4 seconds, the wicking height is 125mm, the evaporation rate is 0.36g/h, the moisture transmission capacity is 120000g/(m < m >/m > g/(m < m > g/h2·d)。
Example 6
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.56dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.1dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the linear spinneret orifices m which directly extrude and flow through to the circular spinneret orifices n which extrude and flow through after being distributed in the parallel composite spinning mode is 1:6, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning manifold I is 276 ℃, the temperature of the spinning manifold II is 260 ℃, and the temperature of the spinning manifold III is 275 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 23 ℃, and the winding speed is 2760 m/min; the parameters of the DT stretching process are as follows: the temperature of a hot plate is 90 ℃, the temperature of a hot plate is 130 ℃, and the multiple is 1.8; the temperature of the relaxation heat treatment is 95 ℃, and the time is 28 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 3:2, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp contraction rate of 66%, a crimp stability of 92.3%, a shrinkage elongation of 111%, and a crimp elastic recovery of 82%; the breaking strength of the self-curling elastic fiber is 3.17cN/dtex, the elongation at break is 47.8 percent, and the total titer is 105 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with the solid content of 38 percent and the stock solution viscosity of 32 ten thousand cps, and the block modified organic silicon resin is organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 193g/m2The washing size change rate of the warp direction is 0.2 percent, the washing size change rate of the weft direction is 0.5 percent, the antibacterial rate to staphylococcus aureus is 88.8 percent, the antibacterial rate to escherichia coli is 86.9 percent, the antibacterial rate to candida albicans is 82.5 percent, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric is 0.22 measured according to the KES FB4 standard, the water absorption rate of the silk-like elastic knitted underwear fabric is 272 percent, the drip diffusion time is 2.5 seconds, the wicking height is 130mm, the evaporation rate is 0.32g/h, and the moisture transmission capacity is 119000g/(m & lt/m & gt)2·d)。
Example 7
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.57dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.15dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the rectangular spinneret orifices m which directly extrude and flow through to the circular spinneret orifices n which extrude and flow through after being distributed in the parallel composite spinning mode is 1:9, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning manifold I is 278 ℃, the temperature of the spinning manifold II is 265 ℃, and the temperature of the spinning manifold III is 275 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 24 ℃, and the winding speed is 2800 m/min; the parameters of the DT stretching process are as follows: the temperature of a hot plate is 95 ℃, the temperature of a hot plate is 130 ℃, and the multiple is 2; the temperature of the relaxation heat treatment is 90 ℃ and the time is 30 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 3:2, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp shrinkage of 69%, a crimp stability of 92.9%, a shrinkage elongation of 110%, and a crimp elastic recovery of 81%; the breaking strength of the self-curling elastic fiber is 3.22cN/dtex, the elongation at break is 48 percent, and the total titer is 116 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with the solid content of 40 percent and the stock solution viscosity of 33 ten thousand cps, and the block modified organic silicon resin is an organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 200g/m2The washing size change rate of the warp direction is 0.2 percent, the washing size change rate of the weft direction is 0.2 percent, the antibacterial rate to staphylococcus aureus is 88.9 percent, the antibacterial rate to escherichia coli is 86.5 percent, the antibacterial rate to candida albicans is 83.9 percent, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric is 0.22 measured according to the KES FB4 standard, the water absorption rate of the silk-like elastic knitted underwear fabric is 246 percent, the dripping water diffusion time is 2.4 seconds, the wicking height is 132mm, the evaporation rate is 0.3g/h, and the moisture transmission capacity is 117000 g/(m) g2·d)。
Example 8
A silk-like elastic knitted underwear fabric is prepared by the following steps:
(1) preparation of self-crimping elastic fiber:
(1.1) extruding self-curling elastic fibers on the same spinneret plate; the PET melt with an intrinsic viscosity of 0.55dL/g was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt with the intrinsic viscosity of 1.13dL/g in a parallel composite spinning mode;
on the same spinneret plate, the number ratio of the 8-shaped spinneret orifices m which directly extrude and flow through to the circular spinneret orifices n which extrude and flow through after being distributed in the parallel composite spinning mode is 1:7, the equivalent diameter ratio of the spinneret orifices m to the spinneret orifices n is 1:1, and the mass ratio of the PET melt passing through the spinneret orifices n to the PTT melt is 50: 50; all the spinneret orifices are distributed in concentric circles, the spinneret orifices on the same circle are m or n, and the spinneret orifices on the circle at the outermost circle are n;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; the flow splitting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning box I, and convey the PTT melt to the distribution hole C through the spinning box II; the temperature of the spinning manifold I is 275 ℃, the temperature of the spinning manifold II is 263 ℃, and the temperature of the spinning manifold III is 276 ℃;
(1.2) preparing POY (polyester pre-oriented yarn) yarns according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT yarns through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the POY process are as follows: the cooling temperature is 23 ℃, and the winding speed is 2700 m/min; the parameters of the DT stretching process are as follows: the temperature of a hot plate is 93 ℃, the temperature of a hot plate is 127 ℃, and the multiple is 1.7; the temperature of the relaxation heat treatment is 110 ℃, and the time is 26 min;
(2) adopting three-thread plaiting weaving and soft finishing to prepare the imitated silk elastic knitted underwear fabric;
the face yarn is made of mercerized cotton fibers and imitated silk PET fibers in a mass ratio of 3:2, and the imitated silk PET fibers are filaments;
the intermediate yarn is made of self-curling elastic fibers which are filaments, the self-curling elastic fibers are composed of PET monofilaments and PTT/PET parallel composite monofilaments, and the monofilaments in the self-curling elastic fibers are randomly distributed in the curling direction; the self-crimping elastic fiber has a crimp shrinkage of 70%, a crimp stability of 94.5%, a shrinkage elongation of 115%, and a crimp elastic recovery of 85%; the breaking strength of the self-curling elastic fiber is 3.31cN/dtex, the elongation at break is 49.5 percent, and the total titer is 150 dtex;
the ground yarn raw material is antibacterial Polyester (PET) fibers shaped like Chinese character 'wang', the antibacterial PET fibers shaped like Chinese character 'wang' are composed of PET fibers shaped like Chinese character 'wang' and nano silver dispersed in the PET fibers and are filaments;
the mass ratio of the surface yarns, the middle yarns and the ground yarns is 1:1: 1;
the soft finishing adopts block modified organic silicon resin with solid content of 40 percent and stock solution viscosity of 35 ten thousand cps, and the block modified organic silicon resin is organic silicon-polyether-amino ternary copolymer block linear chain macromolecular compound;
the produced silk-like elastic knitted underwear fabric has three-thread plaiting texture; the gram weight of the imitated silk elastic knitted underwear fabric is 178g/m2The washing size change rate of the warp direction is 1 percent, the washing size change rate of the weft direction is 1 percent, the antibacterial rate to staphylococcus aureus is 90 percent, the antibacterial rate to escherichia coli is 87.2 percent, the antibacterial rate to candida albicans is 84.1 percent, the dynamic friction coefficient of the silk-like elastic knitted underwear fabric is 0.25 measured according to the KES FB4 standard, the water absorption rate of the silk-like elastic knitted underwear fabric is 270 percent, the dripping diffusion time is 2.4 seconds, the wicking height is 127mm, the evaporation rate is 0.36g/h, and the moisture permeability is 118000 g/(m/(m) g/h2·d)。

Claims (10)

1. A preparation method of a silk-like elastic knitted underwear fabric is characterized by comprising the following steps: carrying out three-line plaiting weaving and soft finishing by taking mercerized cotton fibers and imitated silk PET fibers as surface yarn raw materials, taking self-curling elastic fibers as intermediate yarn raw materials and taking antibacterial Wang-shaped PET fibers as ground yarn raw materials to obtain imitated silk elastic knitted underwear fabric;
the preparation process of the self-crimping elastic fiber comprises the following steps:
extruding the self-curling elastic fiber on the same spinneret plate;
splitting the PET melt into two paths: one path is directly extruded after being distributed; the other path is distributed together with the PTT melt according to a parallel composite spinning mode and then extruded;
on the same spinneret plate, the number ratio of the spinneret orifices m of the direct extrusion flow to the spinneret orifices n of the extrusion flow after being distributed in the parallel composite spinning mode is 1: 5-10;
and preparing POY (polyester pre-oriented yarn) filaments according to a POY (polyester pre-oriented yarn) process after extrusion, preparing DT filaments through a DT (polyester) stretching process, and performing relaxation heat treatment to obtain the self-crimping elastic fiber.
2. The preparation method of the imitated silk elastic knitted underwear fabric, according to claim 1, is characterized in that the mass ratio of the surface yarn, the middle yarn and the ground yarn is 1:1: 1; the mass ratio of the mercerized cotton fibers to the imitated silk PET fibers is 3-4: 2-4; the antibacterial Wang-shaped PET fiber consists of Wang-shaped PET fiber and nano silver dispersed in the Wang-shaped PET fiber; the silk-like PET fibers, the self-curling elastic fibers and the antibacterial Wang-shaped PET fibers are filaments; the soft finishing adopts block modified organic silicon resin with the solid content of 30-40% and the stock solution viscosity of 25-35 ten thousand cps, and the block modified organic silicon resin is an organic silicon-polyether-amino ternary copolymer block straight-chain high molecular compound.
3. The method for preparing the imitated silk elastic knitted underwear fabric, according to claim 1, wherein the mass ratio of the PET melt passing through the spinneret hole n to the PTT melt is 50:50, and the ratio of the equivalent diameter of the spinneret hole m to the equivalent diameter of the spinneret hole n is 1: 1.
4. The method for preparing the silk-like elastic knitted underwear fabric according to claim 1, wherein the spinneret holes m are circular, oval, triangular, Y-shaped, cross-shaped, "8" -shaped, rectangular or in-line spinneret holes, and the spinneret holes n are circular, oval or "8" -shaped spinneret holes.
5. The method for preparing silk-like elastic knitted underwear fabric according to claim 1, wherein all the spinneret holes are distributed in concentric circles, the spinneret holes on the same circle are all m or all n, and the spinneret holes on the outermost circle are all n.
6. The preparation method of the silk-like elastic knitted underwear fabric according to claim 1, wherein the parameters of the POY process are as follows: the cooling temperature is 23-25 ℃, and the winding speed is 2500-2800 m/min; the parameters of the DT stretching process are as follows: the temperature of the hot plate is 85-95 ℃, the temperature of the hot plate is 120-130 ℃, and the multiple is 1.6-2.0; the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
7. The method for preparing the silk-like elastic knitted underwear fabric according to claim 6, wherein the spinneret hole m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret hole n is composed of a guide hole D, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is simultaneously connected with the distribution hole B and the distribution hole C; the distribution hole A, the distribution hole B and the distribution hole C are positioned on a distribution plate in the spinning beam III; and the shunting is to convey the PET melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PTT melt to the distribution hole C through the spinning beam II.
8. The preparation method of the imitated silk elastic knitted underwear fabric, according to claim 7, is characterized in that the intrinsic viscosity of the PET melt is 0.50-0.58 dL/g, the temperature of the spinning manifold I is 275-280 ℃, the intrinsic viscosity of the PTT melt is 1.10-1.20 dL/g, the temperature of the spinning manifold II is 260-265 ℃, and the temperature of the spinning manifold III is 273-276 ℃.
9. The silk-like elastic knitted underwear fabric prepared by the method for preparing the silk-like elastic knitted underwear fabric according to any one of claims 1 to 8 is characterized in that: the polyester yarn has a three-thread plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of PET monofilaments and PTT/PET parallel composite monofilaments; the direction of the single filament crimp in the self-crimping elastic fiber is randomly distributed.
10. The silk-like elastic knitted underwear fabric according to claim 9, wherein the self-curling elastic fibers have a curling shrinkage rate of 66-70%, a curling stability of 92.3-94.5%, a shrinkage elongation of 110-115%, and a curling elastic recovery of 80-85%; the breaking strength of the self-curling elastic fiber is more than or equal to 3.0cN/dtex, the elongation at break is 45.0 +/-4.5%, and the total titer is 75-150 dtex; the gram weight of the imitated silk elastic knitted underwear fabric is 160-200 g/m2In the warp direction andthe washing size change rate of the weft direction is between-1.0% and 1.0%, the antibacterial rate to staphylococcus aureus is more than or equal to 85.3%, the antibacterial rate to escherichia coli is more than or equal to 82.5%, the antibacterial rate to candida albicans is more than or equal to 78.6%, the kinetic friction coefficient of the silk-like elastic knitted underwear fabric measured according to the KES FB4 standard is 0.22 to 0.26, the water absorption rate of the silk-like elastic knitted underwear fabric is more than or equal to 230%, the drip diffusion time is less than or equal to 2.5 seconds, the wicking height is more than or equal to 125mm, the evaporation rate is more than or equal to 0.26g/h, and the moisture permeability is more than or equal to 115000g/(2·d)。
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