CN111118629B - Moisture-absorbing antibacterial knitted fabric and preparation method thereof - Google Patents

Moisture-absorbing antibacterial knitted fabric and preparation method thereof Download PDF

Info

Publication number
CN111118629B
CN111118629B CN201911350231.4A CN201911350231A CN111118629B CN 111118629 B CN111118629 B CN 111118629B CN 201911350231 A CN201911350231 A CN 201911350231A CN 111118629 B CN111118629 B CN 111118629B
Authority
CN
China
Prior art keywords
knitted fabric
moisture
hole
spinneret
antibacterial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911350231.4A
Other languages
Chinese (zh)
Other versions
CN111118629A (en
Inventor
范红卫
张元华
王山水
汤方明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Hengli Chemical Fiber Co Ltd
Original Assignee
Jiangsu Hengli Chemical Fiber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Hengli Chemical Fiber Co Ltd filed Critical Jiangsu Hengli Chemical Fiber Co Ltd
Priority to CN201911350231.4A priority Critical patent/CN111118629B/en
Publication of CN111118629A publication Critical patent/CN111118629A/en
Application granted granted Critical
Publication of CN111118629B publication Critical patent/CN111118629B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • D01D5/08—Melt spinning methods
    • D01D5/082—Melt spinning methods of mixed yarn
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • 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
    • 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
    • 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
    • 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
    • D10B2201/20—Cellulose-derived artificial fibres
    • D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
    • D10B2201/24—Viscose
    • 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
    • D10B2401/02—Moisture-responsive characteristics
    • D10B2401/022—Moisture-responsive characteristics hydrophylic
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Multicomponent Fibers (AREA)
  • Knitting Of Fabric (AREA)

Abstract

The invention relates to a moisture-absorbing antibacterial knitted fabric and a preparation method thereof, which takes cotton fibers as a veil raw material, mixed fibrils as an intermediate yarn raw material, and fine denier 'H' -shaped PET fibers as a ground yarn raw material to carry out three-thread plating knitting and antibacterial finishing to prepare the moisture-absorbing antibacterial knitted fabric; wherein, the combined filament yarn is extruded on the same spinneret plate, and the PTT melt is divided into two paths: one path is directly extruded (flows through an H-shaped spinneret orifice m) after being distributed, and the other path is extruded (flows through a circular spinneret orifice n) after being distributed together with the PBT melt in a parallel composite spinning mode, and is prepared according to the FDY process; the prepared moisture absorption antibacterial knitted fabric has good moisture absorption, quick drying and antibacterial rate indexes, and the monofilament curling directions of the mixed filaments in the finally prepared moisture absorption antibacterial knitted fabric are randomly distributed. The invention solves the problem that the two-component composite fiber is easy to form uneven strip shade when being applied to the moisture absorption antibacterial knitted fabric, and the prepared moisture absorption antibacterial knitted fabric has better moisture absorption antibacterial performance.

Description

Moisture-absorbing antibacterial knitted fabric and preparation method thereof
Technical Field
The invention belongs to the technical field of polyester fibers, and relates to a moisture-absorbing antibacterial knitted fabric and a preparation method thereof.
Background
With the increasing requirements of consumers on textiles, more and more bicomponent composite fibers are applied to the moisture-absorbing antibacterial knitted fabrics. Crimp is an important indicator of fiber, affecting textile processing and final end product characteristics and application properties.
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.
However, in a bundle of bicomponent composite fibers, the crimp form of the fiber is composed of a left and a right helical yarn sections and a random crimp yarn section which are relatively aligned, and the length and arrangement of the yarn sections are random as a whole. Due to the difference of fiber inclination state and mechanical response behavior, when the composite fiber is used for weaving knitted fabric, the difference of yarn reflection effect and tension unevenness is caused, protrusions or depressions are randomly formed on the cloth surface, and uneven transverse stripes with randomly changed brightness and darkness, namely uneven randomness, are found in apparent view. The problem results in that the two-component composite fiber can not be applied to various moisture-absorbing antibacterial knitted fabrics, and the development and application of the two-component composite fiber on the moisture-absorbing antibacterial knitted fabrics are seriously restricted.
Therefore, it is very important to develop a method for avoiding the random strip shade unevenness formed by the bicomponent composite fiber on the moisture-absorbing antibacterial knitted fabric.
Disclosure of Invention
The invention provides a moisture-absorbing antibacterial knitted fabric and a preparation method thereof, and aims to solve the problem that random 'strip-negative-shaped unevenness' is easily formed on the moisture-absorbing antibacterial knitted fabric by a two-component composite fiber in the prior art. According to the invention, the moisture-absorbing antibacterial knitted fabric is prepared by adopting the mixed filament yarn consisting of the PTT monofilament with the H-shaped cross section and the PTT/PBT parallel composite monofilament with the circular cross section, and the problem of uneven stripe shade shape which does not exist in the prepared moisture-absorbing antibacterial knitted fabric is solved because the PTT fiber is mixed with the pure PTT/PBT parallel composite fiber to form neat left and right spiral shapes.
In order to achieve the purpose, the invention adopts the following scheme:
the preparation method of the moisture absorption antibacterial knitted fabric comprises the steps of respectively taking cotton fibers as a face yarn raw material, taking mixed filament yarns as an intermediate yarn raw material, taking fine denier 'H' -shaped PET fibers as a ground yarn raw material, and carrying out three-line plating knitting and antibacterial finishing to obtain the moisture absorption antibacterial knitted fabric;
the preparation process of the combined filament yarn comprises the following steps:
extruding the combined filament yarn on the same spinneret plate;
dividing the PTT melt into two paths: one path is directly extruded after being distributed; the other path is distributed together with the PBT 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: 5-8;
the spinneret orifices m are H-shaped spinneret orifices, and the spinneret orifices n are circular spinneret orifices;
after extrusion, the combined filament yarn is produced according to the FDY process.
The principle of the invention is as follows:
the mixed filament yarn formed by the PTT monofilaments and the PTT/PBT parallel composite monofilaments is equivalent to the mixed filament yarn formed by replacing part of the PTT/PBT parallel composite monofilaments with part of the PTT monofilaments, so that the neat left and right spiral forms of the PTT/PBT bicomponent fibers are broken; in the same mixed filament bundle, the number ratio of PTT monofilaments (corresponding to the spinneret orifices m) to PTT/PBT parallel composite monofilaments (corresponding to the spinneret orifices n) is 1: 5-8, the PTT monofilaments have the function of breaking the formation of a neat left and right spiral form, the PTT/PBT parallel composite monofilaments have the function of providing elasticity for the mixed filament bundles through self-curling, the performance of the mixed filament bundles cannot be well reflected due to too many PTT monofilaments, and if the number of the PTT monofilaments is too small, the effect of forming a neat left-and-right spiral shape cannot be achieved, the PTT monofilaments and the PTT/PBT parallel composite monofilaments are mixed according to a specific proportion, so that the elasticity of the mixed filament yarn is ensured, the neat left-and-right spiral shape formed by the PTT/PBT parallel composite monofilaments is broken, the curling shape of each PTT/PBT parallel composite monofilament is different from other fibers, and the phenomenon of uneven strip shade does not exist.
Furthermore, the wet-absorbing antibacterial knitted fabric is prepared by carrying out three-line plating knitting and antibacterial finishing on the combined filament yarn, the cotton fiber and the fine denier H-shaped PET fiber, and the combined filament yarn has a three-dimensional curling form and can be used as a middle yarn raw material to endow the wet-absorbing antibacterial knitted fabric with good fluffiness; moreover, the antibacterial finishing liquid contains the adhesive and the antibacterial agent, so that the antibacterial component can be fixed on the knitted fabric, and a long-term and efficient antibacterial effect is exerted.
Specifically, the preparation of the combined filament yarn is realized by dividing the PTT melt into two paths, wherein one path is directly extruded after being distributed, and the other path and the PBT melt are extruded after being distributed in a parallel composite spinning mode, and accordingly, the number and the position relation of the distribution holes and the guide holes are reasonably set so as to ensure the smooth operation of the division; the invention ensures that the PTT monofilament part with the H-shaped cross section occupies proper proportion of the whole 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, thereby not only effectively solving the problem of uneven strip shade, but also maintaining the excellent performance of the PTT/PBT parallel composite fiber; the invention distributes the spinneret orifices m and the spinneret orifices n according to the concentric circles and controls the spinneret orifices m to be positioned at the inner ring of the concentric circles as much as possible, thereby ensuring that PTT fibers can be fully doped into the PTT/PBT parallel composite fibers and playing the role of breaking the pure PTT/PBT parallel composite fibers to form a neat left and right spiral shape; according to the invention, the intrinsic viscosity of the PTT melt is selected to be 0.95-1.05 dL/g, the intrinsic viscosity of the PBT melt is 1.10-1.20 dL/g, and the temperature of the spinning manifold III, the temperature of the spinning manifold I and the temperature of the spinning manifold II are reasonably set, so that the apparent viscosities of the PTT component and the PBT component extruded from a spinneret orifice are relatively close, and the smooth proceeding of spinning is ensured; the invention selects the FDY process, so that the product has high curling shrinkage, curling stability, tightening elongation and curling elastic recovery rate, and good mechanical properties.
As a preferred technical scheme:
according to the preparation method of the moisture-absorbing antibacterial knitted fabric, the mass ratio of the surface yarns to the intermediate yarns to the ground yarns is 1:1:1, the filament number of the fine denier H-shaped PET fibers is 0.7-0.9 dtex, the mixed filament yarns and the fine denier H-shaped PET fibers are filaments, working solution adopted in antibacterial finishing is composed of antibacterial finishing agent and water in the mass ratio of 2-5: 95-100, the antibacterial finishing agent is composed of nonionic nano silver ion suspension and weak anion acrylate adhesive in the mass ratio of 3-5: 42-50, and the antibacterial finishing temperature is 90-120 ℃.
According to the preparation method of the moisture-absorbing antibacterial knitted fabric, the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 moisture-absorbing antibacterial knitted fabric, the H shape of the H-shaped spinneret hole is composed of two vertical edges, one transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.2-1.5 times of that of each vertical edge, the center distance between the two ends on the same vertical edge is 6.0-8.0 times of that of each vertical edge, and the minimum center distance between the two ends on different vertical edges is 5.0-6.0 times of that of each vertical edge.
According to the preparation method of the moisture-absorbing antibacterial 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 circle at the outermost circle are n, so that the PTT monofilaments are mixed into the middle of the PTT/PBT parallel composite monofilaments, and the effect of breaking and forming a neat left and right spiral form is achieved; otherwise, more PTT monofilaments are distributed at the outermost circle, so that the inner PTT/PBT side-by-side composite monofilaments still have regular left and right spiral shapes.
In the preparation method of the moisture-absorbing antibacterial knitted fabric, the parameters of the FDY process are as follows: the spinning temperature is 270-274 ℃, the cooling temperature is 20-25 ℃, the network pressure is 0.20-0.30 MPa, the speed of a first roller is 2100-2300 m/min, the temperature of the first roller is 80-90 ℃, the speed of a second roller is 3000-3200 m/min, the temperature of the second roller is 135-150 ℃, and the winding speed is 2930-3110 m/min.
According to the preparation method of the moisture-absorbing antibacterial 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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT melt to the distribution hole C through the spinning beam II.
According to the preparation method of the moisture-absorbing antibacterial knitted fabric, the intrinsic viscosity of a PTT melt is 0.95-1.05 dL/g, the temperature of a spinning box I is 275-277, the intrinsic viscosity of the PBT melt is 1.10-1.20 dL/g, the temperature of a spinning box II is 267-271 ℃, and the temperature of a spinning box III is 270-274 ℃ (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 the PBT and the PTT can be adjusted through temperature, the invention can be matched with the intrinsic viscosity of the PET melt and the intrinsic viscosity of the PTT melt by reasonably setting the temperature of a spinning box III, the temperature of a PTT melt spinning box I and the temperature of a PBT melt spinning box II, the PTT adopts high-temperature melting and low-temperature spinning, and the PBT adopts low-temperature melting and high-temperature spinning, so that the degradation of the PBT can be reduced.
The invention also provides the moisture absorption antibacterial knitted fabric prepared by the preparation method of the moisture absorption antibacterial knitted fabric, which has a three-line plaiting structure, the intermediate yarn is composed of mixed filaments, and the mixed filaments are mainly composed of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with circular cross sections; the filament curling directions of the combined filaments in the finally prepared moisture-absorbing antibacterial knitted fabric are randomly distributed, and the random distribution is a mathematical concept, namely the curling form of each fiber is different from that of other fibers, so that the prepared fabric has no uneven strip shade.
As a preferred technical scheme:
according to the moisture-absorbing and antibacterial knitted fabric, the crimp shrinkage rate of the combined filament yarn in the finally prepared moisture-absorbing and antibacterial knitted fabric is 55-58%, the crimp stability is 90-92%, the contraction elongation is 96-98%, the crimp elastic recovery rate is 96-98%, the breaking strength is larger than or equal to 2.5cN/dtex, the breaking elongation is 50.0 +/-5.0%, and the total titer is 100-200 dtex;
the gram weight of the moisture-absorbing antibacterial knitted fabric is 160-200 g/m2The hygroscopicity index is: the water absorption rate is more than or equal to 260 percent, the drip diffusion time is less than or equal to 2.4 seconds, and the wicking height is more than or equal to 132 mm; the quick drying index is as follows: the evaporation rate is more than or equal to 0.30g/h, and the moisture permeability is more than or equal to 120000g/m2D; the antibacterial rate indexes are as follows: staphylococcus aureus is greater than or equal to 90.0%, Escherichia coli is greater than or equal to 86.8%, and Candida albicans is greater than or equal to 83.8%.
The uneven condition of the strip shade shape of the prepared moisture absorption antibacterial knitted fabric is tested, and the test process is as follows: firstly, acquiring a knitted fabric image, converting the knitted fabric image into a gray image, then performing first processing and second processing on the gray image, and calculating a parameter D, and representing the uneven degree of the strip shadow shape by using the parameter D, wherein the gray image comprises a strip shadow area, a high gray value area of a non-strip shadow area and a low gray value area of the non-strip shadow 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.
The strip shade unevenness can be judged if the D value is more than or equal to 3 percent, and the serious strip shade unevenness can be judged if the D value is more than or equal to 10 percent. The test result of the moisture absorption antibacterial knitted fabric is as follows: d value is less than or equal to 1.0 percent; this indicates that the moisture-absorbing antibacterial knitted fabric of the present application does not have the problem of "uneven stripe pattern".
Has the advantages that:
(1) according to the preparation method of the moisture-absorbing antibacterial knitted fabric, a three-line plating process is adopted, the intermediate yarn contains the mixed filament yarn, the mixed filament yarn is composed of PTT fibers and PTT/PBT parallel composite fibers, the monofilament curling directions of the mixed filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric are randomly distributed, and the adopted mixed filament yarn cannot form the regular arrangement of spiral curling, so that the prepared moisture-absorbing antibacterial knitted fabric does not have the problem of uneven strip shade shape;
(2) the moisture absorption and sweat releasing performance and the antibacterial performance of the moisture absorption and antibacterial knitted fabric prepared by the preparation method of the moisture absorption and antibacterial knitted fabric are better, and the application range is wider.
Drawings
FIG. 1 is a schematic view of the structure of a spinneret orifice m;
fig. 2 is a schematic structural view of a spinneret plate according to 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 GB/T6506-,
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*100；
SR＝(l2-l3)/(l2-l1)*100；
the hygroscopicity index is tested by adopting the standard GB/T21655.12008, the quick-drying index is tested by adopting GB/T21655.12008, and the antibacterial rate index is tested by adopting FZ/T730232006 (AAA).
Example 1
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 0.96dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with PBT melt (the intrinsic viscosity is 1.1dL/g) in a parallel composite spinning mode; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flow to the spinneret orifices n (round spinneret orifices) for extrusion flow after being distributed in the parallel composite spinning mode is 1: 6; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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;
as shown in fig. 1, the H shape of the H-shaped spinneret orifice is composed of two vertical sides, a transverse side and four circular ends, the two vertical sides and the transverse side have the same width, the diameter of each end is 1.2 times of the width of the vertical side, the center distance between the two ends on the same vertical side is 6 times of the width of the vertical side, and the minimum center distance between the two ends on different vertical sides is 5.1 times of the width of the vertical side;
as shown in fig. 2, 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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT 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 268 ℃, and the temperature of the spinning manifold III is 271 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 20 ℃, the network pressure is 0.2MPa, the one-roll speed is 2100m/min, the one-roll temperature is 81 ℃, the two-roll speed is 3000m/min, the two-roll temperature is 136 ℃, and the winding speed is 2950 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.7dtex, and performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 2:95, and carrying out heat setting (at the temperature of 126 ℃ for 90s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 3: 42.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimp shrinkage rate of 55.8 percent, the crimp stability of 90 percent, the contraction elongation of 96.8 percent, the crimp elastic recovery rate of 96 percent, the breaking strength of 2.55cN/dtex, the breaking elongation of 52 percent and the total titer of 100 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 165g/m2The washing size change rates in the warp and weft directions were 1.0% and 1.5%, the D value was 0.65%, and the hygroscopicity indices were: the water absorption rate is 285%, the dripping diffusion time is 2.1 seconds, and the wicking height is 143 mm; the quick drying index is as follows: evaporation rate 0.3g/h, moisture permeability 131000g/m2D; the antibacterial rate indexes are as follows: 91% of staphylococcus aureus, 87.5% of escherichia coli and 85.5% of candida albicans.
Comparative example 1
The preparation method of the moisture absorption antibacterial knitted fabric is basically the same as that in the embodiment 1, and the difference is that in the preparation process of the combined filament yarn, PTT melt is not divided into two paths, but is distributed and extruded together with PBT melt in a parallel composite spinning mode; thus, no PTT monofilaments are present in the resulting combined filament yarn; the D value of the moisture absorption antibacterial knitted fabric is 14.5%.
Comparing example 1 with comparative example 1, it can be seen that the D value of the non-shrink and non-iron wool-like fabric prepared in example 1 is significantly lower than that of comparative example 1, which indicates that the uneven stripes in the moisture-absorbing antibacterial knitted fabric woven by using the mixed filament yarns in example 1 are reduced, because part of the PTT monofilaments are used to replace part of PTT/PBT side-by-side composite fibers in example 1, thereby breaking the neat left and right spiral form of the pure PTT/PBT side-by-side composite fibers; the curling form of each combined filament yarn is different from that of other fibers, and the condition of uneven strip shade shape on the cloth surface can not occur after the moisture absorption antibacterial knitted cloth is prepared; on the other hand, the moisture-absorbing and antibacterial knitted fabric manufactured by the combined filament yarn of comparative example 1 has a regular left and right spiral form of the fiber, and the regular spiral form has uneven stripe shade on the surface of the fabric.
Example 2
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 1dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with PBT melt (the intrinsic viscosity is 1.15dL/g) according to a parallel composite spinning mode; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flow to the spinneret orifices n (round spinneret orifices) for extrusion flow after being distributed in the parallel composite spinning mode is 1: 7; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 H shape of the H-shaped spinneret orifice consists of two vertical edges, a transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.33 times of the width of the vertical edge, the center distance of the two ends on the same vertical edge is 6.8 times of the width of the vertical edge, and the minimum center distance of the two ends on different vertical edges is 5.7 times of the width of the vertical edge;
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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT melt to the distribution hole C through the spinning beam II; the temperature of the spinning manifold I is 276 ℃, the temperature of the spinning manifold II is 269 ℃, and the temperature of the spinning manifold III is 272 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 22 ℃, the network pressure is 0.23MPa, the one-roll speed is 2140m/min, the one-roll temperature is 84 ℃, the two-roll speed is 3110m/min, the two-roll temperature is 139 ℃, and the winding speed is 3000 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.8dtex, and performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 3:98, and carrying out heat setting (at the temperature of 130 ℃ for 75s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 4: 43.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimp shrinkage rate of 56.9 percent, the crimp stability of 91 percent, the shrinkage elongation of 97.1 percent, the crimp elastic recovery rate of 96.3 percent, the breaking strength of 2.8cN/dtex, the breaking elongation of 45 percent and the total titer of 140 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 175g/m2The hygroscopicity index is: water absorption of 274%, drip diffusion time of 2.27 seconds, wicking height of 138 mm; the quick drying index is as follows: evaporation rate 0.31g/h, moisture permeability 126500g/m2D; the antibacterial rate indexes are as follows: 92.3 percent of staphylococcus aureus, 87.4 percent of escherichia coli and 85.6 percent of candida albicans.
Example 3
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 1.03dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with PBT melt (the intrinsic viscosity is 1.16dL/g) according to a parallel composite spinning mode; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flow to the spinneret orifices n (round spinneret orifices) for extrusion flow after being distributed in the parallel composite spinning mode is 1: 6; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 H shape of the H-shaped spinneret orifice consists of two vertical edges, a transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.45 times of the width of the vertical edge, the center distance of the two ends on the same vertical edge is 7.8 times of the width of the vertical edge, and the minimum center distance of the two ends on different vertical edges is 5.6 times of the width of the vertical edge;
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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT 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 269 ℃, and the temperature of the spinning manifold III is 273 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 23 ℃, the network pressure is 0.26MPa, the speed of one roller is 2230m/min, the temperature of one roller is 88 ℃, the speed of two rollers is 3190m/min, the temperature of two rollers is 142 ℃, and the winding speed is 3100 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.85dtex, and performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 4:99, and carrying out heat setting (the temperature is 135 ℃ and the time is 70s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 5: 44.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimp shrinkage rate of 56.7%, the crimp stability of 91.6%, the contraction elongation of 96.9%, the crimp elastic recovery rate of 96.6%, the breaking strength of 2.75cN/dtex, the breaking elongation of 46% and the total fineness of 170 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 180g/m2The hygroscopicity index is: water absorption of 268%, drip diffusion time of 2.35 seconds, wicking height of 134 mm; the quick drying index is as follows: evaporation rate 0.32g/h, moisture permeability 123000g/m2D; the antibacterial rate indexes are as follows: 94% of staphylococcus aureus, 89% of escherichia coli and 87% of candida albicans.
Example 4
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 1.02dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with PBT melt (the intrinsic viscosity is 1.18dL/g) according to a parallel composite spinning mode; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flowing to the spinneret orifices n (round spinneret orifices) for extrusion flowing after being distributed in the parallel composite spinning mode is 1: 8; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 H shape of the H-shaped spinneret orifice consists of two vertical edges, a transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.46 times of the width of the vertical edge, the center distance of the two ends on the same vertical edge is 6.6 times of the width of the vertical edge, and the minimum center distance of the two ends on different vertical edges is 5.3 times of the width of the vertical edge;
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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT melt to the distribution hole C through the spinning beam II; the temperature of the spinning manifold I is 276 ℃, the temperature of the spinning manifold II is 269 ℃, and the temperature of the spinning manifold III is 274 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 25 ℃, the network pressure is 0.28MPa, the first-roller speed is 2250m/min, the first-roller temperature is 87 ℃, the second-roller speed is 3180m/min, the second-roller temperature is 146 ℃, and the winding speed is 3090 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.9dtex, and performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 5:99, and carrying out heat setting (the temperature is 137 ℃ and the time is 67s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 4: 48.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimp shrinkage rate of 55.1 percent, the crimp stability of 91.5 percent, the contraction elongation of 97.3 percent, the crimp elastic recovery rate of 96 percent, the breaking strength of 2.65cN/dtex, the breaking elongation of 47 percent and the total titer of 190 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 188g/m2The hygroscopicity index is: water absorption rate of 265% and water drop diffusionTime 2.4 seconds, wicking height 133 mm; the quick drying index is as follows: evaporation rate 0.32g/h, moisture permeability 122000g/m2D; the antibacterial rate indexes are as follows: 96.5 percent of staphylococcus aureus, 91.5 percent of escherichia coli and 89 percent of candida albicans.
Example 5
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 0.98dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with PBT melt (the intrinsic viscosity is 1.13dL/g) according to a parallel composite spinning mode; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flow to the spinneret orifices n (round spinneret orifices) for extrusion flow after being distributed in the parallel composite spinning mode is 1: 6; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 H shape of the H-shaped spinneret orifice consists of two vertical edges, a transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.23 times of the width of the vertical edge, the center distance of the two ends on the same vertical edge is 6.5 times of the width of the vertical edge, and the minimum center distance of the two ends on different vertical edges is 5.4 times of the width of the vertical edge;
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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT melt to the distribution hole C through the spinning beam II; the temperature of the spinning manifold I is 276 ℃, the temperature of the spinning manifold II is 268 ℃, and the temperature of the spinning manifold III is 272 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 23 ℃, the network pressure is 0.22MPa, the one-roll speed is 2180m/min, the one-roll temperature is 80 ℃, the two-roll speed is 3090m/min, the two-roll temperature is 142 ℃, and the winding speed is 2980 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.78dtex, and performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 3:97, and carrying out heat setting (the temperature is 126 ℃ and the time is 88s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 4: 43.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimping shrinkage rate of 55%, the crimping stability of 90.5%, the contraction elongation of 96.7%, the crimp elastic recovery rate of 98%, the breaking strength of 2.58cN/dtex, the breaking elongation of 48% and the total titer of 110 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 168g/m2The hygroscopicity index is: the water absorption rate is 276%, the drip diffusion time is 2.23 seconds, and the wicking height is 139 mm; the quick drying index is as follows: evaporation rate 0.31g/h, moisture permeability 128000g/m2D; the antibacterial rate indexes are as follows: staphylococcus aureus 90%, colibacillus 86.8% and candida albicans 83.8%.
Example 6
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 0.95dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with PBT melt (the intrinsic viscosity is 1.11dL/g) in a parallel composite spinning mode; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flowing to the spinneret orifices n (round spinneret orifices) for extrusion flowing after being distributed in the parallel composite spinning mode is 1: 5; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 H shape of the H-shaped spinneret orifice consists of two vertical edges, a transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.24 times of the width of the vertical edge, the center distance of the two ends on the same vertical edge is 6.4 times of the width of the vertical edge, and the minimum center distance of the two ends on different vertical edges is 5 times of the width of the vertical edge;
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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT 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 267 ℃, and the temperature of the spinning manifold III is 270 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 21 ℃, the network pressure is 0.21MPa, the one-roll speed is 2150m/min, the one-roll temperature is 83 ℃, the two-roll speed is 3030m/min, the two-roll temperature is 135 ℃, and the winding speed is 2930 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.75dtex, and performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 2:96, and carrying out heat setting (the temperature is 128 ℃ and the time is 90s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 3: 43.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimping shrinkage rate of 55.9 percent, the crimping stability of 90.3 percent, the contraction elongation of 98 percent, the crimp elastic recovery rate of 96.3 percent, the breaking strength of 2.5cN/dtex, the breaking elongation of 55 percent and the total titer of 120 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 160g/m2The hygroscopicity index is: the water absorption rate is 280%, the drip diffusion time is 2.15 seconds, and the wicking height is 140 mm; the quick drying index is as follows: evaporation rate 0.3g/h, moisture permeability 129000g/m2D; the antibacterial rate indexes are as follows: 92.5 percent of staphylococcus aureus, 88 percent of escherichia coli and 86 percent of candida albicans.
Example 7
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 1.05dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed together with PBT melt (the intrinsic viscosity is 1.2dL/g) according to a parallel composite spinning mode and then extruded; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flowing to the spinneret orifices n (round spinneret orifices) for extrusion flowing after being distributed in the parallel composite spinning mode is 1: 8; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 H shape of the H-shaped spinneret orifice consists of two vertical edges, a transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.5 times of the width of the vertical edge, the center distance of the two ends on the same vertical edge is 8 times of the width of the vertical edge, and the minimum center distance of the two ends on different vertical edges is 6 times of the width of the vertical edge;
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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT melt to the distribution hole C through the spinning beam II; the temperature of the spinning manifold I is 276 ℃, the temperature of the spinning manifold II is 268 ℃, and the temperature of the spinning manifold III is 273 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 23 ℃, the network pressure is 0.3MPa, the one-roll speed is 2300m/min, the one-roll temperature is 90 ℃, the two-roll speed is 3200m/min, the two-roll temperature is 150 ℃, and the winding speed is 3110 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.9dtex, and performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 5:100, and carrying out heat setting (at the temperature of 140 ℃ for 60s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 5: 50.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimp shrinkage rate of 58%, the crimp stability of 92%, the contraction elongation of 96%, the crimp elastic recovery rate of 96.5%, the breaking strength of 2.55cN/dtex, the breaking elongation of 49% and the total titer of 200 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 200g/m2The hygroscopicity index is: the water absorption rate is 260%, the drip diffusion time is 2.39 seconds, and the wicking height is 132 mm; the quick drying index is as follows: evaporation rate 0.32g/h, moisture permeability 12000g/m2D; the antibacterial rate indexes are as follows: 97% of staphylococcus aureus, 91.8% of escherichia coli and 89.3% of candida albicans.
Example 8
The preparation method of the moisture-absorbing antibacterial knitted fabric comprises the following steps:
(1) preparation of combined filament yarn:
extruding the combined filament yarn on the same spinneret plate;
the PTT melt (intrinsic viscosity 1.01dL/g) was split into two paths: one path is directly extruded after being distributed; the other path is distributed and extruded together with PBT melt (the intrinsic viscosity is 1.17dL/g) according to a parallel composite spinning mode; the number ratio of the spinneret orifices m (H-shaped spinneret orifices) for direct extrusion flow to the spinneret orifices n (round spinneret orifices) for extrusion flow after being distributed in the parallel composite spinning mode is 1: 7; the mass ratio of the PTT melt passing through the spinneret hole n to the PBT 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 H shape of the H-shaped spinneret orifice consists of two vertical edges, a transverse edge and four circular ends, the width of the two vertical edges is the same as that of the transverse edge, the diameter of each end is 1.35 times of the width of the vertical edge, the center distance of the two ends on the same vertical edge is 7.4 times of the width of the vertical edge, and the minimum center distance of the two ends on different vertical edges is 5.4 times of the width of the vertical edge;
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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT 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 270 ℃, and the temperature of the spinning manifold III is 274 ℃;
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;
preparing mixed filament yarns according to an FDY process after extrusion; the FDY process comprises the following parameters: the cooling temperature is 24 ℃, the network pressure is 0.24MPa, the one-roll speed is 2200m/min, the one-roll temperature is 86 ℃, the two-roll speed is 3120m/min, the two-roll temperature is 140 ℃, and the winding speed is 3050 m/min;
the prepared combined filament yarn consists of PTT monofilaments with H-shaped cross sections and PTT/PBT parallel composite monofilaments with round cross sections;
(2) respectively preparing face yarns from cotton fibers, preparing intermediate yarns from the combined filaments (filaments) prepared in the step (1), preparing ground yarns from fine denier H-shaped PET fibers (filaments) with the filament number of 0.82dtex, and then performing three-thread plating weaving; wherein the mass ratio of the veil to the intermediate yarn to the ground yarn is 1:1: 1; then, carrying out antibacterial finishing by adopting working solution consisting of an antibacterial finishing agent and water in a mass ratio of 4:98, and carrying out heat setting (at the temperature of 133 ℃ for 77s) to obtain the moisture-absorbing antibacterial knitted fabric; wherein the antibacterial finishing agent consists of nonionic nano silver ion suspension and weak anionic acrylate adhesive in a mass ratio of 5: 43.
The combined filament yarn in the finally prepared moisture-absorbing antibacterial knitted fabric has the crimp shrinkage rate of 56.3%, the crimp stability of 91.3%, the contraction elongation of 96.7%, the crimp elastic recovery rate of 96.5%, the breaking strength of 2.62cN/dtex, the breaking elongation of 47% and the total fineness of 160 dtex.
The gram weight of the prepared moisture absorption antibacterial knitted fabric is 177g/m2The hygroscopicity index is: the water absorption rate is 270%, the drip diffusion time is 2.3 seconds, and the wicking height is 136 mm; the quick drying index is as follows: evaporation rate 0.31g/h, moisture permeability 125000g/m2D; the antibacterial rate indexes are as follows: 93.5% of staphylococcus aureus, 88.8% of escherichia coli and white pigmentAnd 86.5 percent of candida albicans.

Claims (8)

1. The preparation method of the moisture-absorbing antibacterial knitted fabric is characterized by comprising the following steps: respectively taking cotton fibers as a face yarn raw material, taking mixed fibril as an intermediate yarn raw material and taking fine denier 'H' -shaped PET fibers as a ground yarn raw material, and carrying out three-line plating knitting and antibacterial finishing to prepare the moisture-absorbing antibacterial knitted fabric; the monofilament curling directions of the combined filament yarns in the moisture-absorbing antibacterial knitted fabric are randomly distributed;
the preparation process of the combined filament yarn comprises the following steps:
extruding the combined filament yarn on the same spinneret plate;
dividing the PTT melt into two paths: one path is directly extruded after being distributed; the other path is distributed together with the PBT 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: 5-8; the mass ratio of the PTT melt passing through the spinneret orifice n to the PBT melt is 50: 50;
the spinneret orifices m are H-shaped spinneret orifices, and the spinneret orifices n are circular spinneret orifices; 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 ratio of the equivalent diameter of the spinneret orifice m to the equivalent diameter of the spinneret orifice n is 1: 1;
after extrusion, the combined filament yarn is produced according to the FDY process.
2. The preparation method of the moisture-absorbing antibacterial 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 filament number of the fine denier H-shaped PET fiber is 0.7-0.9 dtex, the mixed filament yarn and the fine denier H-shaped PET fiber are filaments, a working solution adopted in antibacterial finishing is composed of an antibacterial finishing agent and water in a mass ratio of 2-5: 95-100, the antibacterial finishing agent is composed of a nonionic nano silver ion suspension and a weak anionic acrylate adhesive in a mass ratio of 3-5: 42-50, and the antibacterial finishing temperature is 90-120 ℃.
3. The method for preparing moisture-absorbing antibacterial knitted fabric according to claim 1, characterized in that the "H" shape of the "H" shaped spinneret hole is composed of two vertical edges, one transverse edge and four circular ends, the width of the two vertical edges and the width of the one transverse edge are the same, the diameter of each end is 1.2-1.5 times of the width of the vertical edge, the center distance between the two ends on the same vertical edge is 6.0-8.0 times of the width of the vertical edge, and the minimum center distance between the two ends on different vertical edges is 5.0-6.0 times of the width of the vertical edge.
4. The method for preparing moisture-absorbing antibacterial 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 one roller is 2100-2300 m/min, the temperature of one roller is 80-90 ℃, the speed of two rollers is 3000-3200 m/min, the temperature of two rollers is 135-150 ℃, and the winding speed is 2930-3110 m/min.
5. The method for preparing moisture-absorbing antibacterial knitted fabric according to claim 1, wherein the spinneret hole m is composed of a guide hole E, a transition hole and a capillary hole which are connected in sequence, the spinneret hole n is composed of 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 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 PTT melt to the distribution hole A and the distribution hole B through the spinning beam I, and simultaneously convey the PBT melt to the distribution hole C through the spinning beam II.
6. The method for preparing the moisture-absorbing antibacterial knitted fabric according to claim 5, wherein the intrinsic viscosity of the PTT melt is 0.95-1.05 dL/g, the temperature of a spinning beam I is 275-277 ℃, the intrinsic viscosity of the PBT melt is 1.10-1.20 dL/g, the temperature of a spinning beam II is 267-271 ℃, and the temperature of a spinning beam III is 270-274 ℃.
7. The method for preparing the moisture-absorbing antibacterial knitted fabric according to any one of claims 1 to 6, characterized in that the moisture-absorbing antibacterial knitted fabric has a three-thread plaited structure, the intermediate yarn is composed of mixed filaments, and the mixed filaments are composed of PTT monofilaments with H-shaped cross sections and PTT/PBT side-by-side composite monofilaments with circular cross sections.
8. The method for preparing the moisture-absorbing antibacterial knitted fabric according to claim 7, wherein the combined filament yarn in the prepared moisture-absorbing antibacterial knitted fabric has a crimp shrinkage rate of 55-58%, a crimp stability of 90-92%, a shrinkage elongation of 96-98%, a crimp elastic recovery rate of 96-98%, a breaking strength of not less than 2.5cN/dtex, an elongation at break of 50.0 +/-5.0%, and a total titer of 100-200 dtex;
the gram weight of the moisture-absorbing antibacterial knitted fabric is 160-200 g/m2The hygroscopicity index is: the water absorption rate is more than or equal to 260 percent, the drip diffusion time is less than or equal to 2.4 seconds, and the wicking height is more than or equal to 132 mm; the quick drying index is as follows: the evaporation rate is more than or equal to 0.30g/h, and the moisture permeability is more than or equal to 120000g/m2D; the antibacterial rate indexes are as follows: staphylococcus aureus is greater than or equal to 90.0%, Escherichia coli is greater than or equal to 86.8%, and Candida albicans is greater than or equal to 83.8%.
CN201911350231.4A 2019-12-24 2019-12-24 Moisture-absorbing antibacterial knitted fabric and preparation method thereof Active CN111118629B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911350231.4A CN111118629B (en) 2019-12-24 2019-12-24 Moisture-absorbing antibacterial knitted fabric and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911350231.4A CN111118629B (en) 2019-12-24 2019-12-24 Moisture-absorbing antibacterial knitted fabric and preparation method thereof

Publications (2)

Publication Number Publication Date
CN111118629A CN111118629A (en) 2020-05-08
CN111118629B true CN111118629B (en) 2021-08-13

Family

ID=70501991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911350231.4A Active CN111118629B (en) 2019-12-24 2019-12-24 Moisture-absorbing antibacterial knitted fabric and preparation method thereof

Country Status (1)

Country Link
CN (1) CN111118629B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111519323A (en) * 2020-05-16 2020-08-11 吴宁西 Long-acting antibacterial and virus-resistant purple yarn single-guide knitted fabric and preparation method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02221414A (en) * 1989-02-23 1990-09-04 Mitsubishi Rayon Co Ltd Conjugated fiber yarn
CN101451306A (en) * 2008-12-26 2009-06-10 盛虹集团有限公司 Antibacterial, moisture-absorbing and sweat-releasing finishing combination method for nylon printed knitted fabric
CN103382616B (en) * 2013-06-26 2016-12-28 宁波大千纺织品有限公司 A kind of knitting fabric of polyester-cotton blend absorbing fast-drying and preparation method thereof
CN106192177B (en) * 2016-08-31 2018-11-02 武汉爱帝高级服饰有限公司 One-way wet-guide moisture absorption heating is knitted fabric and preparation method thereof
CN110295400B (en) * 2019-07-02 2022-06-24 同创生活科技(深圳)有限公司 Dehumidifying and breathable sports knitted fabric and preparation method thereof

Also Published As

Publication number Publication date
CN111118629A (en) 2020-05-08

Similar Documents

Publication Publication Date Title
CN107675340A (en) A kind of cool knitting shell fabric
CN111118628B (en) PBT/PET double-component elastic yarn and preparation method thereof
CN110983465B (en) Method for preparing self-curling elastic combined filament yarn for knitting
CN111118617B (en) Full-dull elastic yarn and preparation method thereof
CN111118629B (en) Moisture-absorbing antibacterial knitted fabric and preparation method thereof
CN111041578B (en) PET (polyethylene terephthalate) double-component elastic yarn with different viscosities and preparation method thereof
JP7316444B2 (en) Core-sheath type composite false-twisted yarn and method for producing the same
KR101543113B1 (en) Polyester complex-fiber with highly elasticity, method for manufacturing thereof and polyester conjugated yarn using thereof
CN110965196B (en) Sports knitted fabric and preparation method thereof
CN110983466B (en) PTT/PET double-component elastic yarn and preparation method thereof
CN111118663B (en) PBT/PTT double-component elastic yarn and preparation method thereof
CN101395307B (en) Conjugate fiber-containing yarn
JP2016194182A (en) Pile fabric, manufacturing method thereof, and textile products
CN111058108B (en) Self-curling elastic combined filament yarn for knitting and preparation method thereof
CN111118665B (en) Polyester-nylon composite yarn and preparation method thereof
KR102482996B1 (en) Single process CDP/PET bicomponent composite yarn and its manufacturing method
CN111101236B (en) Self-curling elastic combined filament yarn for knitted denim and preparation method thereof
CN111101264B (en) Shrink-proof non-ironing wool-like fabric and preparation method thereof
CN111118712B (en) Imitated silk elastic knitted underwear fabric and preparation method thereof
JPH0651925B2 (en) Fiber with special cross-sectional shape
CN111118627B (en) Heat-humidity comfortable knitted fabric and preparation method thereof
CN111101237A (en) High-low viscosity PET parallel composite self-crimping fiber and preparation method thereof
KR102100565B1 (en) Core-sheath type composite false-twist yarn and manufacturing method thereof
CN111041573B (en) Seat fabric and preparation method thereof
CN111041577B (en) PET/modified PET double-component elastic yarn and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant