CN110965196A - Sports knitted fabric and preparation method thereof - Google Patents

Sports knitted fabric and preparation method thereof Download PDF

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Publication number
CN110965196A
CN110965196A CN201911350177.3A CN201911350177A CN110965196A CN 110965196 A CN110965196 A CN 110965196A CN 201911350177 A CN201911350177 A CN 201911350177A CN 110965196 A CN110965196 A CN 110965196A
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Prior art keywords
blade
knitted fabric
self
spinneret
hole
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CN110965196B (en
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王丽丽
王山水
范红卫
任怀林
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
    • D04B1/10—Patterned fabrics or articles
    • D04B1/102—Patterned fabrics or articles with stitch pattern
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/02—Heat treatment
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—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
    • 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
    • D04B1/10—Patterned fabrics or articles
    • D04B1/12—Patterned fabrics or articles characterised by thread material
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/06—Patterned fabrics or articles
    • D04B21/08—Patterned fabrics or articles characterised by thread material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H3/00—Inspecting textile materials
    • D06H3/08—Inspecting textile materials by photo-electric or television means
    • 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]

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Knitting Of Fabric (AREA)

Abstract

The invention relates to a sports knitted fabricThe method comprises the steps of taking cotton fibers as a face yarn raw material, taking self-crimping elastic fibers as an intermediate yarn raw material, taking fine denier cross-shaped PET fibers as a ground yarn raw material, carrying out three-thread plating weaving, and finishing to obtain the sports knitted fabric; the self-curling elastic fiber is prepared by dividing CDP melt into two paths according to the FDY process: one path is directly extruded after being distributed, and the other path is extruded after being distributed together with the PTT melt in a parallel composite spinning mode. The sports knitted fabric prepared by the invention does not have the problem of uneven stripe shade; the gram weight of the sports knitted fabric is 120-160 g/m2The washing size change rate of the warp direction and the weft direction is between-1.0% and 1.0%, the water absorption of the sports knitted fabric is more than or equal to 275%, the water dropping diffusion time is less than or equal to 2.2 seconds, the wicking height is more than or equal to 142mm, the evaporation rate is more than or equal to 0.33g/h, and the moisture permeability is more than or equal to 128000g/(m & lt/m & gt)2·d)。

Description

Sports knitted fabric and preparation method thereof
Technical Field
The invention belongs to the technical field of textile fabrics, and relates to a sports knitted fabric and a preparation method thereof.
Background
Consumers today place ever higher demands on the comfort and function of textiles. For clothes in spring and summer, it is desirable that they are light, breathable and comfortable; for autumn and winter clothing, it is required to have good warmth retention property. The sportswear only has good moisture absorption and sweat releasing functions, and the traditional fabric cannot meet the requirements of consumers. Therefore, the development of the sports fabric has practical significance. The sports moisture-absorbing and sweat-releasing fabric is mainly suitable for being used in environments with large amount of exercise, much sweat and hot weather, and generally conducts sweat on the surface of a human body outwards through close-fitting sportswear so as to keep the skin dry and comfortable.
In the family of the bicomponent composite fiber, the side-by-side bicomponent composite fiber is an important member, and the fiber is bent deviating from the axial direction of the fiber by utilizing the difference of the heat shrinkage performance of the two components, so that the fiber presents permanent three-dimensional spiral crimp, and the crimp similar to wool fiber is obtained. The fiber is crimped without deformation processing carried out when common thermoplastic fibers are crimped, so that the thermal damage of chemical fibers is avoided, the fiber is generally called self-crimped fiber and also called three-dimensional crimped fiber, the crimp has the characteristics of durability, stability, good elasticity and the like, and the fabric can be endowed with better elasticity, bulkiness and coverage. Parallel two-component composite fibers with different performances can be obtained by changing the characteristics of the component high polymer, the cross section shape, the component distribution, the component proportion, the spinning drafting and the heat setting process parameters, and the parallel two-component composite fibers have the advantages of designable performances and higher application value, so the parallel two-component composite fibers are favored and valued by the fiber manufacturing industry and can be used for preparing sports fabrics.
If the sportswear is mainly required to have comfort, the effective elongation must be selected, and the requirement for elongation is further increased in the case of close-fitting clothes such as sportswear, ski wear, and tights. In addition, the clothing pressure also has some influence on the human body. Comfortable garment pressure range; the sports fabric has better extensibility, larger extensibility and better recoverability, and a human body can feel more easily stretched in fabrics and clothes, so that the sports fabric is more comfortable and close-fitting. But when the parallel bicomponent composite fiber is pushed to be more widely applied to the knitting field, very troublesome problems appear: because the side-by-side bicomponent fiber forms a regular spiral crimp structure during heat shrinkage, the surface of the woven knitted fabric has random strip-shaped uneven shade, and the method is particularly obvious on plain knitted fabrics. This problem has led to the fact that side-by-side bicomponent fibers cannot be used in a wide variety of knitted products such as sports knitted fabrics.
Therefore, the development of the sports knitted fabric of the side-by-side bicomponent fiber for avoiding the random strip shade unevenness has very important significance.
Disclosure of Invention
The invention provides a sports knitted fabric and a preparation method thereof, and aims to solve the problem that random strip shade unevenness occurs when double-component parallel fibers are applied to the sports knitted fabric in the prior art. The invention adopts the mode of making the CDP/PTT parallel composite monofilament and the CDP monofilament coexist in a bundle of fibers in the preparation process of the self-crimping elastic fiber, and because the contraction modes and the forms of the CDP/PTT parallel composite monofilament and the CDP monofilament are different, the problem that the pure CDP/PTT parallel composite fiber forms orderly left and right spiral forms, and the prepared sports knitted fabric has no 'uneven stripe shade' is solved.
In order to achieve the purpose, the invention adopts the following scheme:
the preparation method of the sports knitted fabric comprises the steps of respectively taking cotton fibers as a face yarn raw material, taking self-crimping elastic fibers as a middle yarn raw material and taking fine denier cross-shaped PET fibers as a ground yarn raw material, carrying out three-thread plating knitting and finishing to obtain the sports knitted 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;
dividing the CDP 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;
the number ratio of the spinneret orifices m for directly extruding flow to the spinneret orifices n for extruding flow after being distributed in the parallel composite spinning mode is 1: 5-7;
the spinneret orifices m are four-leaf spinneret orifices, and the spinneret orifices n are round spinneret orifices;
and (3) preparing FDY filaments according to an FDY process after extrusion, and performing relaxation heat treatment to obtain the self-curling elastic fiber.
Specifically, the invention respectively takes cotton fiber as a face yarn raw material, self-curling elastic fiber as a middle yarn raw material and fine denier cross-shaped PET fiber as a ground yarn raw material, sets the mass ratio of the face yarn, the middle yarn and the ground yarn, and also controls the single filament number of the fine denier cross-shaped PET fiber, and the finally prepared sports knitted fabric has better moisture absorption and sweat releasing performance; the invention adopts the mode of dividing CDP melt into two paths, one path is directly extruded after being distributed, the other path and the PTT melt are extruded after being distributed according to the parallel composite spinning mode, so that the coexistence of CDP/PTT parallel composite monofilaments and CDP monofilaments in a bundle of fibers is realized, and correspondingly, the quantity and the position relation of distribution holes and guide holes are reasonably set so as to ensure the smooth operation of the flow division; the invention ensures that the proper proportion of CDP monofilament part in the whole body by controlling the ratio of the number of the spinneret orifices m which directly extrude and flow through and the number of the spinneret orifices n which extrude and flow through after being distributed according to the parallel composite spinning mode, not only can effectively solve the problem of uneven strip shade shape, but also can keep the excellent performance of the CDP/PTT parallel composite fiber; the invention arranges the spinneret orifices m and the spinneret orifices n according to the concentric circles, and controls the spinneret orifices m to be positioned in the inner rings of the concentric circles as much as possible, thereby ensuring that CDP fibers can be fully doped into CDP/PTT parallel composite fibers and playing the role of breaking pure CDP/PTT parallel composite fibers to form regular left and right spiral shapes; the temperature of the spinning manifold I, the temperature of the spinning manifold II and the temperature of the spinning manifold III are reasonably set, so that the temperature of the spinning manifold I, the temperature of the spinning manifold II and the temperature of the spinning manifold III can be matched with the intrinsic viscosity (0.55-0.60 dL/g) of the CDP melt and the intrinsic viscosity (1.10-1.20 dL/g) of the PTT melt, the apparent viscosities of the CDP component and the PTT component extruded from a spinneret orifice are relatively close, and the smooth running of spinning is ensured; the spinneret orifices m in the invention are four-leaf spinneret orifices, the spinneret orifices n are round spinneret orifices, the FDY process is selected, and the parameters of the FDY process are reasonably set, so that the prepared fiber has better comprehensive performance.
The principle of the invention is as follows:
the CDP monofilament and CDP/PTT parallel composite monofilament form the mixed filament yarn, the CDP/PTT parallel composite monofilament obtains three-dimensional crimp fiber after relaxation heat treatment, there is neat left and right spiral form, and the CDP monofilament does not produce crimp after relaxation heat treatment, the mixed filament yarn formed by CDP monofilament and CDP/PTT parallel composite monofilament of the invention is equivalent to replacing CDP/PTT parallel composite monofilament with partial CDP monofilament, thus break the neat left and right spiral form of pure CDP/PTT bicomponent fiber; in the same mixed filament bundle, the ratio of the number of CDP monofilaments (corresponding to the spinneret holes m) to the number of CDP/PTT parallel composite monofilaments (corresponding to the spinneret holes n) is 1: 5-7, the CDP monofilaments have the function of breaking the formation of a neat left and right spiral form, the CDP/PTT parallel composite monofilaments have the function of providing elasticity for the mixed filament through self-curling, too many CDP monofilaments cannot well reflect the performance of the composite filament, and too little CDP monofilament can not play a role in breaking and forming the neat left and right spiral form, the CDP monofilament and CDP/PTT parallel composite monofilament are mixed according to the specific proportion, which not only ensures the elasticity of the mixed filament, but also breaks the neat left and right spiral form formed by the CDP/PTT parallel composite monofilament, so that the curling form of each CDP/PTT parallel composite monofilament is different from other fibers, and the sport type knitting fabric prepared by the same has no phenomenon of uneven strip shade.
As a preferred technical scheme:
according to the preparation method of the sports knitted fabric, the mass ratio of the surface yarns to the intermediate yarns to the ground yarns is 1:1:1, the single-filament number of the fine-denier cross-shaped PET fibers is 0.5-0.7 dtex, and the self-crimping elastic fibers and the fine-denier cross-shaped PET fibers are filaments.
According to the preparation method of the sports knitted fabric, the mass ratio of the CDP 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 sports knitted fabric, four blades are sequentially a blade I, a blade II, a blade III and a blade IV in a four-blade spinneret hole along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 80-90 degrees, the included angle β between the central lines of the blade II and the blade III is 90-100 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 80-90 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers to the vertex angles, the widths of the four blades are the same, the tail ends of the four blades far from the center are rounded corners, the radius of the rounded corner at the tail end of each blade is 1/2 of the blade width of each blade, and the ratio of the blade length of each blade to the blade width of each blade is 2.
According to the preparation method of the sports knitted 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 CDP monofilaments are mixed into the CDP/PTT parallel composite monofilaments, and the effect of breaking and forming a regular left and right spiral form is achieved; otherwise, more CDP monofilaments are distributed at the outermost turns, so that the inner CDP/PTT parallel composite monofilaments still have regular left and right spiral shapes.
In the preparation method of the sports knitted fabric, the parameters of the FDY process are as follows: the cooling temperature is 20-25 ℃, the network pressure is 0.20-0.30 MPa, the speed of a first roller is 1800-2000 m/min, the temperature of the first roller is 80-90 ℃, the speed of a second roller is 2900-3200 m/min, the temperature of the second roller is 135-150 ℃, and the winding speed is 2830-3110 m/min; the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
According to the preparation method of the sports knitted fabric, the spinneret orifice m is composed of the guide hole E, the transition hole and the capillary micropore which are connected in sequence, the spinneret orifice n is composed of the guide hole D, the transition hole and the 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 CDP 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 sports knitted fabric, the intrinsic viscosity of the CDP melt is 0.55-0.60 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 270-275 ℃, and the temperature of the spinning manifold III is 276-278 ℃ (the temperature of the spinning manifold 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 (generally, the greater the apparent viscosity, the poorer the flow property); the apparent viscosity of CDP and PTT can be adjusted by temperature, the invention can be matched with the intrinsic viscosity of CDP melt and the intrinsic viscosity of PTT melt by reasonably setting the temperature of spinning manifold I, spinning manifold II and spinning manifold III, CDP adopts low temperature melting and high temperature spinning, PTT adopts high temperature melting and low temperature spinning, thus reducing the degradation of CDP, although the temperature difference of two components in the manifold is larger, the two components enter into the same composite component to generate heat exchange, the temperature of PTT component is reduced, the temperature of CDP component is raised, thus the apparent viscosity of two components extruded from the spinneret orifice is close to the same, thereby ensuring the smooth proceeding of spinning.
The invention also provides the sports knitted fabric prepared by the preparation method of the sports knitted fabric, which has a three-thread plaiting texture, the middle yarn is composed of self-curling elastic fibers, and the self-curling elastic fibers are composed of CDP monofilaments with a four-leaf shape in cross section and CDP/PTT parallel composite monofilaments with a circular cross section; 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 sports knitted fabric has the advantages that the self-curling elastic fibers have the curling shrinkage rate of 51-55%, the curling stability of 86-88%, the contraction elongation of 93-96% and the curling elastic recovery rate of 94-97%;
the breaking strength of the self-curling elastic fiber is more than or equal to 2.6cN/dtex, the elongation at break is 50.0 +/-5.0 percent, and the total titer is 100-200 dtex; the gram weight of the sports knitted fabric is 120-160 g/m2The washing size change rate of the warp direction and the weft direction is between-1.0% and 1.0%, the water absorption rate of the sports knitted fabric is more than or equal to 275% according to GB/T21655.12008, the water drop diffusion time is less than or equal to 2.2 seconds, the wicking height is more than or equal to 142mm, the evaporation rate is more than or equal to 0.33g/h, and the moisture permeability is more than or equal to 128000 g/(m) m2·d)。
The obtained sports knitted fabric is subjected to the uneven condition test of the strip shade shape, and the test process is as follows: firstly, acquiring the knitted fabric image and converting the knitted fabric image into a gray image, then carrying out primary processing and secondary processing on the gray image, and calculating a parameter D, and representing the uneven degree of the shade bar shape by using the parameter D, wherein the gray image comprises a shade bar area, a high gray value area of a non-shade bar area and a low gray value area of the non-shade bar 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 sports knitted fabric provided by the invention is as follows: the D value of the sports knitted fabric is less than or equal to 1.0 percent; this indicates that the sportswear knitted fabric of the present invention does not have the problem of "uneven stripe shape".
Has the advantages that:
(1) the invention relates to a preparation method of a sports knitted fabric, which adopts a three-thread plating process, wherein the intermediate yarn raw material is self-curling elastic fiber, the self-curling elastic fiber is subjected to heat treatment to change the spiral curling state of single fiber in multifilament, so that the curling form of each fiber is different from that of other fibers, and the prepared sports knitted fabric has no problem of uneven strip shade;
(2) the sports knitted fabric prepared by the preparation method of the sports knitted fabric is good in moisture absorption and sweat releasing performance and wider in application range.
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, two fiber samples with the length of about 50cm are cut, put into hot water with the temperature of 100 ℃ for treatment for 30min, taken out and naturally dried, and then the sample with the length of about 30cm is cut, one end of the sample is fixed, and the other end of the sample is loaded with 0.0018 cN-The load of dtex, lasting 30s, is marked at 20cm, i.e.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
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 0.6dL/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 (the intrinsic viscosity is 1.1dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 7; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 80 degrees, the included angle β between the central lines of the blade II and the blade III is 90 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 80 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers to vertex angles of the four blades, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of the four blades is 1/2 of the width of each blade, and the ratio of;
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 CDP 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; the temperature of the spinning manifold I is 277 ℃, the temperature of the spinning manifold II is 274 ℃, and the temperature of the spinning manifold III is 278 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the network pressure is 0.2MPa, the one-roller speed is 2000m/min, the one-roller temperature is 80 ℃, the two-roller speed is 3160m/min, the two-roller temperature is 135 ℃, and the winding speed is 3060 m/min; the temperature of the relaxation heat treatment is 104 ℃, and the time is 30 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.5dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber had a crimp contraction rate of 54%, a crimp stability of 86%, a shrinkage elongation of 94.5%, and a crimp elastic recovery of 94.4%; the breaking strength of the self-curling elastic fiber is 3cN/dtex, the elongation at break is 49.4 percent, and the total titer is 150 dtex; of sportswear fabricsThe gram weight is 120g/m2The washing dimension change rate of the warp direction is-1%, the washing dimension change rate of the weft direction is-1%, the water absorption rate of the sports knitted fabric is 275%, the water drop diffusion time is 2.2 seconds, the wicking height is 142mm, the evaporation rate is 0.33g/h, and the moisture permeability is 128000g/(m & lt/m & gt)2·d)。
Comparative example 1
The process of the preparation method of the sports knitted fabric is basically the same as that of the embodiment 1, and the difference is that in the spinning process, CDP melt is not divided into two paths, but is distributed and extruded together with PTT melt in a parallel composite spinning mode; therefore, no straight CDP monofilament exists in the prepared CDP/PTT double-component elastic yarn.
The CDP/PTT double-component elastic yarn prepared in comparative example 1 and example 1 was tested for uneven stripe female shape of two plain knit fabrics by using plain knit fabrics woven by a circular knitting machine with seamless formation, and the results obtained by the test were: the D value of the plain woven fabric made of the CDP/PTT bicomponent elastic yarn in example 1 was 0.95%; the D value of the plain woven fabric made of the CDP/PTT bicomponent elastic yarn in comparative example 1 was 18.5%; this shows that the uneven condition of the strip shade in the plain weave knitted fabric woven by the CDP/PTT double-component elastic yarn in the embodiment 1 is reduced, because the CDP/PTT parallel composite monofilament is replaced by partial CDP monofilament in the embodiment 1, thereby breaking the neat left and right spiral shape of the pure CDP/PTT double-component composite fiber; the curling form of each CDP/PTT parallel composite monofilament is different from other fibers, and the condition of uneven strip shade shape on the cloth surface can not occur after the CDP/PTT parallel composite monofilament is made into plain weave knitted fabric; the plain woven fabric prepared by the CDP/PTT double-component elastic yarn of the comparative example 1 has regular left and right spiral forms, and the regular spiral form has uneven strip shade on the cloth surface.
Example 2
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 0.57dL/g) was split into two: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt (the intrinsic viscosity is 1.16dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 6; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 80 degrees, the included angle β between the central lines of the blade II and the blade III is 92 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 90 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers to vertex angles of the four blades, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of the four blades is 1/2 of the width of each blade, and the ratio of;
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 CDP 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; the temperature of the spinning manifold I is 280 ℃, the temperature of the spinning manifold II is 271 ℃, and the temperature of the spinning manifold III is 276 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 20 ℃, the network pressure is 0.25MPa, the one-roller speed is 1950m/min, the one-roller temperature is 90 ℃, the two-roller speed is 3120m/min, the two-roller temperature is 140 ℃, and the winding speed is 3030 m/min; the temperature of the relaxation heat treatment is 103 ℃, and the time is 28 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.5dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber has a crimp shrinkage of 55%, a crimp stability of 87%, a shrinkage elongation of 96%, and a crimp elastic recovery of 95%; the breaking strength of the self-curling elastic fiber is 3.15cN/dtex, the elongation at break is 46 percent, and the total titer is 115 dtex; the gram weight of the sports knitted fabric is 150g/m2The washing dimension change rate of the warp direction is-0.8%, the washing dimension change rate of the weft direction is-0.6%, the water absorption rate of the sports knitted fabric is 288%, the dripping water diffusion time is 2 seconds, the wicking height is 143mm, the evaporation rate is 0.34g/h, and the moisture permeability is 128500 g/(m/(m) m2·d)。
Example 3
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 0.58dL/g) was split into two: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt (the intrinsic viscosity is 1.18dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 7; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 80 degrees, the included angle β between the central lines of the blade II and the blade III is 95 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 80 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers of the four blades to vertex angles, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of each blade is 1/2 of the width of each blade, and the ratio of the;
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 CDP 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; the temperature of the spinning manifold I is 278 ℃, the temperature of the spinning manifold II is 275 ℃, and the temperature of the spinning manifold III is 277 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 21 ℃, the network pressure is 0.23MPa, the one-roll speed is 2000m/min, the one-roll temperature is 86 ℃, the two-roll speed is 2900m/min, the two-roll temperature is 137 ℃, and the winding speed is 2830 m/min; the temperature of the relaxation heat treatment is 120 ℃, and the time is 29 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.55dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber had a crimp contraction rate of 51%, a crimp stability of 86.5%, a shrinkage elongation of 93%, and a crimp elastic recovery of 94.1%; the breaking strength of the self-curling elastic fiber is 2.8cN/dtex, the elongation at break is 53.2 percent, and the total titer is 125 dtex; the gram weight of the sports knitted fabric is 146g/m2The washing dimension change rate of the warp direction is-0.2%, the washing dimension change rate of the weft direction is-0.5%, the water absorption rate of the sports knitted fabric is 297%, the dripping water diffusion time is 1.8 seconds, the wicking height is 148mm, the evaporation rate is 0.36g/h, and the moisture permeability is 128800 g/(m) m2·d)。
Example 4
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 0.55dL/g) was split into two: one path is directly extruded after being distributed; the other path is distributed and extruded together with the PTT melt (the intrinsic viscosity is 1.15dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 5; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 80 degrees, the included angle β between the central lines of the blade II and the blade III is 90 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 90 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers of the four blades to vertex angles, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of each blade is 1/2 of the width of each blade, and the ratio of the;
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 CDP 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; the temperature of the spinning manifold I is 280 ℃, the temperature of the spinning manifold II is 270 ℃, and the temperature of the spinning manifold III is 278 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 23 ℃, the network pressure is 0.24MPa, the first-roller speed is 1850m/min, the first-roller temperature is 88 ℃, the second-roller speed is 3200m/min, the second-roller temperature is 138 ℃, and the winding speed is 3110 m/min; the temperature of the relaxation heat treatment is 90 ℃ and the time is 24 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.58dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber had a crimp contraction rate of 53%, a crimp stability of 86.3%, a shrinkage elongation of 93.7%, and a crimp elastic recovery of 94.5%; the breaking strength of the self-curling elastic fiber is 3.1cN/dtex, the elongation at break is 46.5 percent, and the total titer is 195 dtex; the gram weight of the sports knitted fabric is 135g/m2The washing dimension change rate of the warp direction is 0.1 percent, the washing dimension change rate of the weft direction is 0.2 percent, the water absorption rate of the sports knitted fabric is 300 percent, the water drop diffusion time is 1.8 seconds, the wicking height is 149mm, the evaporation rate is 0.38g/h, and the moisture permeability is 128000 g/(m/(m) m2·d)。
Example 5
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 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 (the intrinsic viscosity is 1.17dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 7; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 86 degrees, the included angle β between the central lines of the blade II and the blade III is 100 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 88 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers to vertex angles of the four blades, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of each blade is 1/2 of the width of each blade, and the ratio of the;
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 CDP 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; the temperature of the spinning beam I is 280 ℃, the temperature of the spinning beam II is 272 ℃, and the temperature of the spinning beam III is 277 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the network pressure is 0.28MPa, the first roller speed is 1965m/min, the first roller temperature is 87 ℃, the second roller speed is 3180m/min, the second roller temperature is 136 ℃, and the winding speed is 3060 m/min; the temperature of the relaxation heat treatment is 105 ℃, and the time is 25 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.6dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber has a crimp shrinkage of 52%, a crimp stability of 86.2%, a shrinkage elongation of 95%, and a crimp elastic recovery of 94.8%; the breaking strength of the self-curling elastic fiber is 3.4cN/dtex, the elongation at break is 45 percent, and the total titer is 130 dtex; the gram weight of the sports knitted fabric is 150g/m2The washing size change rate in the warp direction was 0.5%, the washing size change rate in the weft direction was 0.3%,the water absorption rate of the sports knitted fabric is 308 percent, the drip diffusion time is 1.7 seconds, the wicking height is 155mm, the evaporation rate is 0.43g/h, and the moisture permeability is 130100 g/(m)2·d)。
Example 6
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 0.59dL/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 (the intrinsic viscosity is 1.16dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 5; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 88 degrees, the included angle β between the central lines of the blade II and the blade III is 90 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 90 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers of the four blades to vertex angles, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of each blade is 1/2 of the width of each blade, and the ratio of the;
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 CDP 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; the temperature of the spinning manifold I is 275 ℃, the temperature of the spinning manifold II is 271 ℃, and the temperature of the spinning manifold III is 276 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the network pressure is 0.3MPa, the one-roll speed is 1900m/min, the one-roll temperature is 85 ℃, the two-roll speed is 3160m/min, the two-roll temperature is 148 ℃, and the winding speed is 3090 m/min; the temperature of the relaxation heat treatment is 104 ℃, and the time is 20 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.6dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber has a crimp shrinkage of 51%, a crimp stability of 86%, a shrinkage elongation of 95.7%, and a crimp elastic recovery of 94%; the breaking strength of the self-curling elastic fiber is 3.3cN/dtex, the elongation at break is 47 percent, and the total titer is 105 dtex; the gram weight of the sports knitted fabric is 133g/m2The washing dimension change rate of the warp direction is 0.2 percent, the washing dimension change rate of the weft direction is 0.5 percent, the water absorption rate of the sports knitted fabric is 312 percent, the water drop diffusion time is 1.5 seconds, the wicking height is 160mm, the evaporation rate is 0.42g/h, and the moisture permeability is 129900 g/(m/(m) m2·d)。
Example 7
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 0.59dL/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 (the intrinsic viscosity is 1.2dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 6; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 85 degrees, the included angle β between the central lines of the blade II and the blade III is 98 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 80 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers of the four blades to vertex angles, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of each blade is 1/2 of the width of each blade, and the ratio of the;
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 CDP 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; the temperature of the spinning manifold I is 275 ℃, the temperature of the spinning manifold II is 271 ℃, and the temperature of the spinning manifold III is 278 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the network pressure is 0.22MPa, the one-roller speed is 2000m/min, the one-roller temperature is 85 ℃, the two-roller speed is 3150m/min, the two-roller temperature is 136 ℃, and the winding speed is 3080 m/min; the temperature of the relaxation heat treatment is 114 ℃, and the time is 23 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.7dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber has a crimp shrinkage of 53%, a crimp stability of 86%, a shrinkage elongation of 94%, and a crimp elastic recovery of 97%; the breaking strength of the self-curling elastic fiber is 2.6cN/dtex, the elongation at break is 55 percent, and the total titer is 116 dtex; the gram weight of the sports knitted fabric is 160g/m2The washing dimension change rate of the warp direction is 0.2%, the washing dimension change rate of the weft direction is 0.2%, the water absorption rate of the sports knitted fabric is 280%, the water drop diffusion time is 2.1 seconds, the wicking height is 145mm, the evaporation rate is 0.34g/h, and the moisture permeability is 128800 g/(m/(m) m2·d)。
Example 8
The preparation method of the sports knitted fabric comprises the following steps:
(1) preparing self-crimping elastic fibers:
(1.1) extruding self-curling elastic fibers on the same spinneret plate, specifically:
the CDP melt (intrinsic viscosity 0.6dL/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 (the intrinsic viscosity is 1.2dL/g) in a parallel composite spinning mode;
the number ratio of the spinneret orifices m (quadrulobe spinneret orifices) for directly extruding and flowing through to the spinneret orifices n (round spinneret orifices) for extruding and flowing through after being distributed in the parallel composite spinning mode is 1: 6; the mass ratio of the CDP 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;
the four blades in the four-blade spinneret orifice are sequentially a blade I, a blade II, a blade III and a blade IV along the clockwise or anticlockwise direction, the included angle α between the central lines of the blade I and the blade II is 90 degrees, the included angle β between the central lines of the blade II and the blade III is 90 degrees, the included angle gamma between the central lines of the blade III and the blade IV is 90 degrees, the lengths of the four blades are the same, the lengths of the four blades are the distances from the centers of the four blades to vertex angles, the widths of the four blades are the same, the tail ends of the four blades, which are far away from the centers, are rounded corners, the radius of the rounded corners at the tail ends of each blade is 1/2 of the width of each blade, and the ratio of the;
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 CDP 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; the temperature of the spinning manifold I is 280 ℃, the temperature of the spinning manifold II is 273 ℃, and the temperature of the spinning manifold III is 278 ℃;
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;
(1.2) preparing FDY filaments after extrusion according to an FDY process, and then performing relaxation heat treatment to obtain self-curling elastic fibers;
the parameters of the FDY process are as follows: the cooling temperature is 20 ℃, the network pressure is 0.27MPa, the first roller speed is 1880m/min, the first roller temperature is 86 ℃, the second roller speed is 3200m/min, the second roller temperature is 150 ℃, and the winding speed is 3110 m/min; the temperature of the relaxation heat treatment is 101 ℃, and the time is 29 min;
(2) respectively taking cotton fibers as a face yarn raw material, self-curling elastic fibers (filaments) as an intermediate yarn raw material and fine-denier cross-shaped PET fibers (filaments) with the filament number of 0.7dtex as a ground yarn raw material, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1: 1; carrying out three-thread plating weaving and finishing to obtain a sports knitted fabric;
the produced sports knitted fabric is characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the single filaments in the self-curling elastic fiber are randomly distributed in the curling direction;
the self-crimping elastic fiber has a crimp shrinkage of 52%, a crimp stability of 88%, a shrinkage elongation of 95%, and a crimp elastic recovery of 97%; 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 200 dtex; the gram weight of the sports knitted fabric is 148g/m2The washing dimension change rate of the warp direction is 1 percent, the washing dimension change rate of the weft direction is 1 percent, the water absorption rate of the sports knitted fabric is 290 percent, the dripping diffusion time is 1.8 seconds, the wicking height is 147mm, the evaporation rate is 0.4g/h, and the moisture permeability is 128300 g/(m/h)2·d)。

Claims (10)

1. The preparation method of the sports knitted fabric is characterized by comprising the following steps: respectively taking cotton fibers as a face yarn raw material, taking self-curling elastic fibers as a middle yarn raw material and taking fine denier cross-shaped PET fibers as a ground yarn raw material, carrying out three-thread plating weaving and finishing to obtain a sports knitted 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;
dividing the CDP 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;
the number ratio of the spinneret orifices m for directly extruding flow to the spinneret orifices n for extruding flow after being distributed in the parallel composite spinning mode is 1: 5-7;
the spinneret orifices m are four-leaf spinneret orifices, and the spinneret orifices n are round spinneret orifices;
and (3) preparing FDY filaments according to an FDY process after extrusion, and performing relaxation heat treatment to obtain the self-curling elastic fiber.
2. The method for preparing the sports knitted fabric according to claim 1, wherein the mass ratio of the face yarn to the intermediate yarn to the ground yarn is 1:1:1, the single-filament fineness of the fine-denier cross-shaped PET fiber is 0.5-0.7 dtex, and the self-crimping elastic fiber and the fine-denier cross-shaped PET fiber are filaments.
3. The method of claim 1, wherein the mass ratio of CDP melt to PTT melt passing through the spinneret n is 50:50, and the ratio of the equivalent diameter of spinneret m to spinneret n is 1: 1.
4. The preparation method of the sports knitted fabric according to claim 1, characterized in that four blades in a four-blade spinneret hole are sequentially a blade I, a blade II, a blade III and a blade IV along a clockwise direction or a counterclockwise direction, an included angle α between the central lines of the blade I and the blade II is 80-90 degrees, an included angle β between the central lines of the blade II and the blade III is 90-100 degrees, an included angle gamma between the central lines of the blade III and the blade IV is 80-90 degrees, the lengths of the four blades are the same, the lengths of the four blades are distances from the center to a vertex angle, the widths of the four blades are the same, the tail ends of the four blades far from the center are rounded corners, the radius of the rounded corner at the tail end of each blade is 1/2 of the blade width of the four blades, and the ratio of the blade length to the blade width of each blade is 2.5.
5. The method of claim 1, wherein all the orifices are arranged in concentric circles, the orifices in the same circle are all m or all n, and the orifices in the outermost circle are all n.
6. The method for preparing a sports knitted fabric according to claim 1, wherein the parameters of the FDY process are as follows: the cooling temperature is 20-25 ℃, the network pressure is 0.20-0.30 MPa, the speed of a first roller is 1800-2000 m/min, the temperature of the first roller is 80-90 ℃, the speed of a second roller is 2900-3200 m/min, the temperature of the second roller is 135-150 ℃, and the winding speed is 2830-3110 m/min; the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
7. The method of claim 6, wherein the spinneret hole m is formed by a guide hole E, a transition hole and a capillary hole which are connected in sequence, the spinneret hole n is formed by a guide hole D, a transition hole and a capillary hole which are connected in sequence, the guide hole E is connected with the distribution hole A, and the guide hole D is connected with the distribution hole B and the distribution hole C simultaneously; 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 CDP 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 method for preparing the sports knitted fabric according to claim 7, wherein the intrinsic viscosity of the CDP melt is 0.55-0.60 dL/g, the temperature of the spinning beam I is 275-280 ℃, the intrinsic viscosity of the PTT melt is 1.10-1.20 dL/g, the temperature of the spinning beam II is 270-275 ℃, and the temperature of the spinning beam III is 276-278 ℃.
9. The sportswear knitted fabric produced by the method for producing sportswear knitted fabric according to any one of claims 1 to 8, characterized in that: the yarn has a three-line plaiting structure, the intermediate yarn consists of self-curling elastic fibers, and the self-curling elastic fibers consist of CDP monofilaments with a four-leaf-shaped cross section and CDP/PTT parallel composite monofilaments with a circular cross section; the direction of the single filament crimp in the self-crimping elastic fiber is randomly distributed.
10. The sportswear knitted fabric according to claim 9, wherein the self-curling elastic fiber has a crimp contraction rate of 51 to 55%, a crimp stability of 86 to 88%, a shrinkage elongation of 93 to 96%, and a crimp elastic recovery of 94 to 97%; the breaking strength of the self-curling elastic fiber is more than or equal to 2.6cN/dtex, the elongation at break is 50.0 +/-5.0 percent, and the total titer is 100-200 dtex; the gram weight of the sports knitted fabric is 120-160 g/m2The washing size change rate in both the warp and weft directionsBetween-1.0 percent and 1.0 percent, the water absorption of the sports knitted fabric is more than or equal to 275 percent, the dripping water diffusion time is less than or equal to 2.2 seconds, the wicking height is more than or equal to 142mm, the evaporation rate is more than or equal to 0.33g/h, and the moisture permeability is more than or equal to 128000 g/(m)2·d)。
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US4157419A (en) * 1977-09-16 1979-06-05 E. I. Du Pont De Nemours And Company Polyester feed yarn for draw-texturing
JPH02221414A (en) * 1989-02-23 1990-09-04 Mitsubishi Rayon Co Ltd Conjugated fiber yarn
CN102162165A (en) * 2011-03-29 2011-08-24 上海嘉麟杰纺织品股份有限公司 Knitted fabric with multiple functions of keeping warm, absorbing moisture, releasing sweat and resisting bacteria and weaving method
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GB1130996A (en) * 1966-03-19 1968-10-16 Kanegafuchi Boseki Kabushki Ka A method of manufacturing stretchable knitted goods
US4157419A (en) * 1977-09-16 1979-06-05 E. I. Du Pont De Nemours And Company Polyester feed yarn for draw-texturing
JPH02221414A (en) * 1989-02-23 1990-09-04 Mitsubishi Rayon Co Ltd Conjugated fiber yarn
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112064177A (en) * 2020-08-28 2020-12-11 佛山市智布互联纺织有限公司 Elastic double-sanitary-wear fabric and processing technology thereof

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