CN111134379A - Preparation method of non-glue cotton for underwear - Google Patents

Preparation method of non-glue cotton for underwear Download PDF

Info

Publication number
CN111134379A
CN111134379A CN201911386341.6A CN201911386341A CN111134379A CN 111134379 A CN111134379 A CN 111134379A CN 201911386341 A CN201911386341 A CN 201911386341A CN 111134379 A CN111134379 A CN 111134379A
Authority
CN
China
Prior art keywords
underwear
modified pbt
cotton
trilobal
ptt
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.)
Granted
Application number
CN201911386341.6A
Other languages
Chinese (zh)
Other versions
CN111134379B (en
Inventor
沈建根
朱承乾
张元华
丁霞
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 CN201911386341.6A priority Critical patent/CN111134379B/en
Publication of CN111134379A publication Critical patent/CN111134379A/en
Application granted granted Critical
Publication of CN111134379B publication Critical patent/CN111134379B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41B—SHIRTS; UNDERWEAR; BABY LINEN; HANDKERCHIEFS
    • A41B17/00—Selection of special materials for underwear
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/19—Hydroxy compounds containing aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/19—Hydroxy compounds containing aromatic rings
    • C08G63/191—Hydroquinones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/66—Polyesters containing oxygen in the form of ether groups
    • C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/672—Dicarboxylic acids and dihydroxy compounds
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D01D5/23—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool by asymmetrical cooling of filaments, threads, or the like, leaving the spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/32—Side-by-side structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • 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
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2501/00—Wearing apparel
    • D10B2501/02—Underwear

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Multicomponent Fibers (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention relates to a preparation method of non-glue cotton for underwear, which takes polyester fiber for underwear and low-melting-point polyester fiber as raw materials; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping; the preparation process of the polyester fiber for the underwear comprises the following steps: in the process of preparing circular parallel composite fibers from modified PBT and PTT according to the FDY process, the spinneret orifices on the spinneret plate are changed from a circular shape into a trilobal shape with unequal trefoil lengths and unequal widths, circular blowing cooling is adopted, the arrangement of the trilobal spinneret orifices on the spinneret plate is controlled to meet the condition that all the trilobal spinneret orifices are distributed in concentric circles, the center line of the shortest leaf of each trilobal spinneret orifice passes through the center of a circle and points away from the center of the circle, FDY filaments are prepared, and the polyester fibers for underwear are obtained by carrying out relaxation heat treatment on the FDY filaments. The preparation method of the non-glue cotton for the underwear is simple and easy to implement, low in cost, environment-friendly and safe, and suitable for popularization and application.

Description

Preparation method of non-glue cotton for underwear
Technical Field
The invention belongs to the technical field of textile fabrics, and relates to a preparation method of non-glue cotton for underwear.
Background
The material of the existing underwear fabric is usually polyurethane sponge, and the polyurethane sponge is polyurethane foam with the density lower than 18kg/m3In the following low-density PU, the foam finishing is carried out in an organic solvent, which is usually toxic or harmful. Therefore, the research on the environment-friendly and nontoxic underwear fabric has very important significance.
Disclosure of Invention
The invention provides a preparation method of non-glue cotton for underwear, and aims to solve the problems that sponge in underwear fabric needs to be subjected to foaming finishing in the prior art, and a large amount of organic solvent is used in the finishing process.
In order to achieve the purpose, the invention adopts the following scheme:
a method for preparing non-glue cotton for underwear comprises using polyester fiber and low-melting-point polyester fiber for underwear as raw materials; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the preparation process of the polyester fiber for underwear comprises the following steps:
in the process of preparing circular parallel composite fibers from modified PBT and PTT according to an FDY process, changing spinneret orifices on a spinneret plate from a circle to a trilobal shape, cooling by adopting circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions to prepare FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear;
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; according to the invention, PBT is modified, the elasticity and flexibility of the polyester fiber are improved by introducing the PTMG chain segment into the molecular chain, and meanwhile, the crystallinity of the polyester fiber is reduced by replacing part of terephthalic acid chain segment with the isophthalic acid chain segment, so that the elasticity and flexibility of the polyester fiber are further improved;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.5-2.0: 2.0-2.5, the lengths of two long leaves are different, the width ratio of the corresponding three leaves is 1:1.5:1, the length-width ratio of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the contact surfaces of the modified PBT and the PTT when flowing in the guide holes of the trilobal spinneret holes are parallel to each other (since the apparent viscosities of the modified PBT and the PTT are close to each other in the guide holes of the trilobal spinneret holes, the contact surfaces of the modified PBT and the PTT are approximately flat).
The principle of the invention is as follows:
the raw materials of the non-glue cotton for the underwear are polyester fiber for the underwear and low-melting-point polyester fiber, the preparation process does not need to carry out foaming finishing by organic solvent, the non-glue cotton is environment-friendly and non-toxic, and has no peculiar smell, wherein, the polyester fiber for the underwear is prepared according to FDY process, modified PBT melt and PTT melt are extruded from trilobal spinneret orifices with unequal length and unequal width on the same spinneret plate, in the parallel composite spinning of the invention, the contact surfaces of the modified PBT melt and the PTT melt when flowing in the guide holes of the trilobal spinneret orifices are parallel to each other (the apparent viscosities of the modified PBT melt and the PTT melt are close, the contact surfaces of the modified PBT melt and the PTT melt are approximate to planes), and a boundary line is formed between the two different melts, because the arrangement of the trilobal spinneret orifices on the spinneret plate meets the condition that all the trilobal spinneret orifices are distributed in concentric circles, the central line of the shortest leaf of, and points to the condition of deviating from the circle center ", so that monofilaments extruded from different spinneret holes on the same spinneret plate are different, and the difference is as follows: in the spinning process, the spinning pressure and the melt mass ratio are constant, the mass ratio of the melt in each spinneret hole is the same, but because the included angle between the center line of the longest leaf in the trilobal and the intersection line of different melts in the guide hole is different, the contact surface area of different melts in different monofilaments is different (namely, the trilobal is divided into two parts which are parallel by an imaginary line, one part corresponds to the modified PBT, the other part corresponds to the PTT, and the contact surface of the two parts is different in size on the cross section) so that after the fiber is subjected to heat treatment, the fiber has a three-dimensional curling shape due to the difference of the heat shrinkage rates of the modified PBT and the PTT.
The polyester fiber for the underwear is the trefoil FDY drawn yarn with three-dimensional crimp shape and the cross section of the three-leaf FDY drawn yarn with unequal length and unequal width, and the rigidity of the trefoil with the same area is larger than that of a round fiber, so that the flexural modulus is improved under the condition of unchanged titer, the bending directions of the fibers are different, and the fibers are not easy to fall down on the basis of ensuring the flexibility; because the fibers have a three-dimensional curling shape, the space between the adjacent fibers is expanded; the trilobal profile and the curled shape make the underwear made therefrom soft but also have excellent elasticity and bulk properties without the presence of collodion.
As a preferred technical scheme:
according to the preparation method of the non-glue cotton for the underwear, the mass ratio of the modified PBT to the PTT is 50: 50.
According to the preparation method of the non-glue cotton for the underwear, in the process of preparing the modified PBT, the addition amount of the isophthalic acid is 2-3 wt% of the addition amount of the terephthalic acid, and the addition amount of the PTMG is 8-12 wt% of the addition amount of the terephthalic acid.
According to the preparation method of the non-glue cotton for the underwear, the intrinsic viscosity of the modified PBT is 1.10-1.20 dL/g, and the temperature of a spinning box corresponding to the modified PBT is 270-273 ℃; the intrinsic viscosity of the PTT is 0.95-1.05 dL/g, and the temperature of a spinning box corresponding to the PTT is 275-280 ℃. In order to ensure that the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of each trilobal spinneret orifice, the two components need to be ensured to have the same flowing state when extruded from the same spinneret orifice as much as possible, namely the apparent viscosity of a melt is close to that of the melt; the apparent viscosities of the modified PBT and the PTT can be adjusted through temperature, the invention can be matched with the intrinsic viscosity (1.10-1.20 dL/g) of a modified PBT melt and the intrinsic viscosity (0.95-1.05 dL/g) of a PTT melt by reasonably setting the spinning box temperature and the spinning temperature corresponding to the modified PBT and the PTT, the modified PBT is melted at high temperature and spun at low temperature, and the PTT is melted at low temperature and spun at high temperature, so that the degradation of the PTT can be reduced.
The preparation method of the non-glue cotton for the underwear comprises the following parameters of the FDY process: the spinning temperature is 274-276 ℃, the cooling temperature is 20-25 ℃, the first roller speed is 1800-2000 m/min, the first roller temperature is 75-85 ℃, the two roller speed is 3400-3500 m/min, the two roller temperature is 125-130 ℃, and the winding speed is 3350-3430 m/min.
According to the preparation method of the non-glue cotton for the underwear, the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
According to the preparation method of the non-glue cotton for the underwear, the polyester fiber for the underwear has a three-dimensional crimp shape and consists of a plurality of modified PBT/PTT parallel composite monofilaments with the cross sections in the trefoil shape, an imaginary line intersecting the trefoil shape is made, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT.
According to the preparation method of the non-glue cotton for the underwear, the breaking strength of the polyester fiber for the underwear is more than or equal to 2.5cN/dtex, the elongation at break is 50.0 +/-4.0%, and the total fineness is 75-100 dtex.
According to the preparation method of the non-glue cotton for the underwear, the polyester fiber for the underwear has the crimp shrinkage rate of 30-35%, the crimp stability of 85-90%, the shrinkage elongation of 82-86% and the crimp elastic recovery of 83-88%.
An undergarment as described aboveThe gram weight of the non-glue cotton for the underwear is 0.01-0.03 g/m3And a 75% compression set of less than 4.0% (test standard GB10802-89 flexible polyurethane foam).
Has the advantages that:
(1) according to the preparation method of the non-glue cotton for the underwear, the polyester fiber for the underwear in the raw materials is the parallel composite fiber prepared from the modified PBT and the PTT, and the elasticity and the softness of the polyester fiber are greatly improved by modifying the PBT;
(2) the preparation method of the non-glue cotton for the underwear, disclosed by the invention, does not need organic foaming finishing of PU sponge, and is more environment-friendly and safer.
Drawings
FIG. 1 is a schematic view of the trilobal spinneret orifice of the present invention;
FIG. 2 is a schematic representation of the distribution of trilobal orifices of the present invention on a spinneret.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The crimp shrinkage and crimp stability of the invention are obtained by testing the tow in GB6506-2001 synthetic fiber textured yarn crimp performance test method;
the method for testing the shrinkage elongation (reflecting the elasticity and the crimp degree of the deformed filament, the fiber is firstly loaded under light load and then loaded under heavy load, and the ratio of the length difference value under the two loads to the crimp length) and the crimp elastic recovery rate is as follows:
firstly, cutting two fiber samples with the length of about 50cm, placing 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, cutting out 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, and marking the sample at the position of 20cmI.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)。
the trilobal spinneret orifice and the distribution thereof on the spinneret plate are shown in the attached figures 1-2, the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.5-2.0: 2.0-2.5, the lengths of two long leaves are different, the width ratio of the corresponding three leaves is 1:1.5:1, the length-width ratio of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center. The drawings are only schematic and should not be construed as limiting the invention.
Example 1
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 2 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 8 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.1dL/g and PTT with the intrinsic viscosity of 0.95dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 270 ℃, and the temperature of the spinning beam corresponding to the PTT is 275 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.5:2.0, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 274 ℃, the cooling temperature is 20 ℃, the first-roller speed is 1800m/min, the first-roller temperature is 75 ℃, the second-roller speed is 3400m/min, the second-roller temperature is 125 ℃, and the winding speed is 3350 m/min;
the temperature of the relaxation heat treatment is 90 ℃ and the time is 30 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.5cN/dtex, an elongation at break of 54%, a total fineness of 75dtex, a crimp shrinkage of 30%, a crimp stability of 85%, a shrinkage elongation of 82%, and a crimp elastic recovery of 83%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.01g/m3The 75% compression set was 3.8%.
Example 2
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 2 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 11 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.17dL/g and PTT with the intrinsic viscosity of 1.03dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 270 ℃, and the temperature of the spinning beam corresponding to the PTT is 276 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.5:2.2, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.9:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 274 ℃, the cooling temperature is 20 ℃, the first roller speed is 1847m/min, the first roller temperature is 76 ℃, the second roller speed is 3406m/min, the second roller temperature is 126 ℃, and the winding speed is 3369 m/min;
the temperature of the relaxation heat treatment is 91 ℃, and the time is 30 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.5cN/dtex, an elongation at break of 54%, a total fineness of 96dtex, a crimp shrinkage of 30%, a crimp stability of 85%, a shrinkage elongation of 82%, and a crimp elastic recovery of 84%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.01g/m3The 75% compression set was 3.8%.
Example 3
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 3 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 12 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.12dL/g and PTT with the intrinsic viscosity of 1.04dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 272 ℃, and the temperature of the spinning beam corresponding to the PTT is 276 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.5:2.5, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.8:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 274 ℃, the cooling temperature is 21 ℃, the first-roller speed is 1851m/min, the first-roller temperature is 80 ℃, the second-roller speed is 3416m/min, the second-roller temperature is 127 ℃, and the winding speed is 3375 m/min;
the temperature of the relaxation heat treatment is 101 ℃, and the time is 29 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.6cN/dtex, an elongation at break of 51%, a total fineness of 78dtex, a crimp shrinkage of 32%, a crimp stability of 86%, a shrinkage elongation of 83%, and a crimp elastic recovery of 85%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.01g/m3The 75% compression set was 3.8%.
Example 4
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 3 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 8 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.19dL/g and PTT with the intrinsic viscosity of 0.97dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 272 ℃, and the temperature of the spinning beam corresponding to the PTT is 277 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.8:2.0, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.8:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 275 ℃, the cooling temperature is 22 ℃, the first roller speed is 1871m/min, the first roller temperature is 81 ℃, the second roller speed is 3425m/min, the second roller temperature is 128 ℃, and the winding speed is 3396 m/min;
the temperature of the relaxation heat treatment is 104 ℃, and the time is 27 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.7cN/dtex, an elongation at break of 48%, a total fineness of 91dtex, a crimp shrinkage of 32%, a crimp stability of 88%, a shrinkage elongation of 83%, and a crimp elastic recovery of 87%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.01g/m3The 75% compression set was 3.4%.
Example 5
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 2 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 12 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.15dL/g and PTT with the intrinsic viscosity of 1.02dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 272 ℃, and the temperature of the spinning beam corresponding to the PTT is 278 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:2.0:2.1, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.7:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 275 ℃, the cooling temperature is 22 ℃, the first-roller speed is 1957m/min, the first-roller temperature is 83 ℃, the second-roller speed is 3460m/min, the second-roller temperature is 129 ℃, and the winding speed is 3400 m/min;
the temperature of the relaxation heat treatment is 104 ℃, and the time is 27 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.7cN/dtex, an elongation at break of 48%, a total fineness of 79dtex, a crimp shrinkage of 32%, a crimp stability of 88%, a shrinkage elongation of 83%, and a crimp elastic recovery of 88%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.03g/m3The 75% compression set was 3.3%.
Example 6
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 2 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 12 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.13dL/g and PTT with the intrinsic viscosity of 1.02dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 273 ℃, and the temperature of the spinning beam corresponding to the PTT is 279 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:2.0:2.5, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.9:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 275 ℃, the cooling temperature is 23 ℃, the one-roll speed is 1991m/min, the one-roll temperature is 83 ℃, the two-roll speed is 3480m/min, the two-roll temperature is 130 ℃, and the winding speed is 3402 m/min;
the temperature of the relaxation heat treatment is 104 ℃, and the time is 23 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.8cN/dtex, an elongation at break of 46%, a total fineness of 86dtex, a crimp shrinkage of 34%, a crimp stability of 88%, a shrinkage elongation of 85%, and a crimp elastic recovery of 88%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.03g/m3The 75% compression set was 2.6%.
Example 7
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 2 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 11 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.11dL/g and PTT with the intrinsic viscosity of 0.97dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 273 ℃, and the temperature of the spinning beam corresponding to the PTT is 279 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.5:2.0, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 3.0:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 276 ℃, the cooling temperature is 25 ℃, the first roller speed is 1998m/min, the first roller temperature is 84 ℃, the second roller speed is 3481m/min, the second roller temperature is 130 ℃, and the winding speed is 3405 m/min;
the temperature of the relaxation heat treatment is 117 ℃, and the time is 23 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.8cN/dtex, an elongation at break of 46%, a total fineness of 89dtex, a crimp shrinkage of 35%, a crimp stability of 89%, a shrinkage elongation of 85%, and a crimp elastic recovery of 88%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.02g/m3The 75% compression set was 2.5%.
Example 8
A preparation method of non-glue cotton for underwear comprises the following steps:
(1) preparing modified PBT:
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment; in the process of preparing the modified PBT, the adding amount of the isophthalic acid is 3 wt% of the adding amount of the terephthalic acid, and the adding amount of the PTMG is 12 wt% of the adding amount of the terephthalic acid;
(2) preparation of polyester fiber for underwear:
in the process of preparing circular parallel composite fibers from modified PBT with the intrinsic viscosity of 1.2dL/g and PTT with the intrinsic viscosity of 1.05dL/g according to an FDY process, changing spinneret orifices on a spinneret plate from circular to trilobal, cooling by circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions, preparing FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear; wherein the mass ratio of the modified PBT to the PTT is 50: 50; the temperature of the spinning beam corresponding to the modified PBT is 273 ℃, and the temperature of the spinning beam corresponding to the PTT is 280 ℃; the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of the trilobal spinneret orifices;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.5:2.5, the width ratio of the corresponding three leaves is 1:1.5:1, the length ratio of the shortest leaf to the width ratio is 3.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the parameters of the FDY process are as follows: the spinning temperature is 276 ℃, the cooling temperature is 25 ℃, the first-roller speed is 2000m/min, the first-roller temperature is 85 ℃, the second-roller speed is 3500m/min, the second-roller temperature is 130 ℃, and the winding speed is 3430 m/min;
the temperature of the relaxation heat treatment is 120 ℃, and the time is 20 min;
the prepared polyester fiber for the underwear has a three-dimensional curling shape, consists of a plurality of modified PBT/PTT parallel composite monofilaments with trilobal cross sections, and is taken as an imaginary line intersected with the trilobal, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT; the polyester fiber for underwear has a breaking strength of 2.8cN/dtex, an elongation at break of 46%, a total fineness of 100dtex, a crimp shrinkage of 35%, a crimp stability of 90%, a shrinkage elongation of 86%, and a crimp elastic recovery of 88%;
(3) preparing non-glue cotton for underwear:
the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the obtained non-collodion cotton for underwear has a gram weight of 0.03g/m3The 75% compression set was 2.5%.

Claims (10)

1. A preparation method of non-glue cotton for underwear is characterized by comprising the following steps: the raw materials are polyester fiber for underwear and low-melting-point polyester fiber; the process flow is as follows: opening, mixing cotton → quantitatively feeding cotton → carding → lapping → drying and shaping;
the preparation process of the polyester fiber for underwear comprises the following steps:
in the process of preparing circular parallel composite fibers from modified PBT and PTT according to an FDY process, changing spinneret orifices on a spinneret plate from a circle to a trilobal shape, cooling by adopting circular blowing, controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions to prepare FDY filaments, and performing relaxation heat treatment on the FDY filaments to obtain polyester fibers for underwear;
the molecular chain of the modified PBT consists of a terephthalic acid chain segment, a 1, 4-butanediol chain segment, an isophthalic acid chain segment and a PTMG chain segment;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.5-2.0: 2.0-2.5, the lengths of two long leaves are different, the width ratio of the corresponding three leaves is 1:1.5:1, the length-width ratio of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
the certain conditions are as follows: all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the contact surfaces of the modified PBT and the PTT are parallel to each other when flowing in the guide holes of each trilobal spinneret orifice.
2. The method for preparing the collodion-free cotton for the underwear according to claim 1, wherein the mass ratio of the modified PBT to the PTT is 50: 50.
3. The method for preparing non-glue cotton for underwear according to claim 2, wherein in the process of preparing the modified PBT, the addition amount of the isophthalic acid is 2-3 wt% of the addition amount of the terephthalic acid, and the addition amount of the PTMG is 8-12 wt% of the addition amount of the terephthalic acid.
4. The preparation method of the collodion-free cotton for the underwear according to claim 3, wherein the intrinsic viscosity of the modified PBT is 1.10-1.20 dL/g, and the temperature of a spinning manifold corresponding to the modified PBT is 220-223 ℃; the intrinsic viscosity of the PTT is 0.95-1.05 dL/g, and the temperature of a spinning box corresponding to the PTT is 225-280 ℃.
5. The method for preparing the non-glue cotton for the underwear according to claim 4, wherein the parameters of the FDY process are as follows: the spinning temperature is 224-22 ℃ to 20 ℃, the cooling temperature is 20-25 ℃, the first roller speed is 1800-2000 m/min, the first roller temperature is 25-85 ℃, the second roller speed is 3400-3500 m/min, the second roller temperature is 125-130 ℃, and the winding speed is 3350-3430 m/min.
6. The method for preparing non-glue cotton for underwear according to claim 5, wherein the temperature of the relaxation heat treatment is 90-120 ℃ and the time is 20-30 min.
7. The method for preparing the collodion-free cotton for the underwear according to the claim, wherein the polyester fiber for the underwear has a three-dimensional crimp shape, and is composed of a plurality of modified PBT/PTT side-by-side composite monofilaments with the cross sections in the trefoil shape, and an imaginary line intersecting the trefoil shape is made, the trefoil shape is divided into two parts by the imaginary line, one part corresponds to the modified PBT, and the other part corresponds to the PTT.
8. The method for preparing the non-glue cotton for the underwear according to claim 2, wherein the breaking strength of the polyester fiber for the underwear is more than or equal to 2.5cN/dtex, the elongation at break is 50.0 +/-4.0%, and the total fineness is 25-100 dtex.
9. The method of claim 2, wherein the polyester fiber for underwear has a crimp contraction percentage of 30 to 35%, a crimp stability of 85 to 90%, a shrinkage elongation of 82 to 8%, and a crimp elastic recovery of 83 to 88%.
10. The method for preparing the non-glue cotton for the underwear according to claim 1, wherein the gram weight of the non-glue cotton for the underwear is 0.01-0.03 g/m3And 25% compression set less than 4.0%.
CN201911386341.6A 2019-12-29 2019-12-29 Preparation method of non-glue cotton for underwear Active CN111134379B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911386341.6A CN111134379B (en) 2019-12-29 2019-12-29 Preparation method of non-glue cotton for underwear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911386341.6A CN111134379B (en) 2019-12-29 2019-12-29 Preparation method of non-glue cotton for underwear

Publications (2)

Publication Number Publication Date
CN111134379A true CN111134379A (en) 2020-05-12
CN111134379B CN111134379B (en) 2021-08-13

Family

ID=70521329

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911386341.6A Active CN111134379B (en) 2019-12-29 2019-12-29 Preparation method of non-glue cotton for underwear

Country Status (1)

Country Link
CN (1) CN111134379B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111910288A (en) * 2020-07-13 2020-11-10 浙江恒澜科技有限公司 High-strength composite elastic fiber and preparation method thereof
CN114734697A (en) * 2022-03-19 2022-07-12 晋江市港益纤维制品有限公司 Manufacturing process of base fabric in gauze

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54112211A (en) * 1978-02-21 1979-09-03 Toyobo Co Ltd Manufacture of polyamide filament yarn of trilobal cross- section
CA1071364A (en) * 1975-07-18 1980-02-12 Badische Canada Limited Trilobal synthetic textile filament
CN101302659A (en) * 2008-05-09 2008-11-12 桐乡市健民过滤材料有限公司 Bi-component polyester coarse fibre, filter material and preparation thereof
CN201506868U (en) * 2009-09-18 2010-06-16 辛婷芬 Composite special-shaped hole type spinneret plate
CN201648598U (en) * 2010-04-12 2010-11-24 吴书家 Spinning plate
CN102330234A (en) * 2011-05-25 2012-01-25 高莉萍 Polyester special yarn
CN102425037A (en) * 2011-09-29 2012-04-25 黄显飚 Environmental-friendly fiber cotton and preparation process thereof
CN103590139A (en) * 2013-10-16 2014-02-19 扬州广泰化纤有限公司 Powerful three-dimensional crimp memory fibers and production method thereof
CN106381547A (en) * 2016-08-31 2017-02-08 江苏恒力化纤股份有限公司 Porous soft polyester fiber FDY yarn and preparing method thereof
CN106400179A (en) * 2016-08-31 2017-02-15 浙江盛元化纤有限公司 Preparation method of lodging-resistant multi-difference polyester low-elastic filament

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1071364A (en) * 1975-07-18 1980-02-12 Badische Canada Limited Trilobal synthetic textile filament
JPS54112211A (en) * 1978-02-21 1979-09-03 Toyobo Co Ltd Manufacture of polyamide filament yarn of trilobal cross- section
CN101302659A (en) * 2008-05-09 2008-11-12 桐乡市健民过滤材料有限公司 Bi-component polyester coarse fibre, filter material and preparation thereof
CN201506868U (en) * 2009-09-18 2010-06-16 辛婷芬 Composite special-shaped hole type spinneret plate
CN201648598U (en) * 2010-04-12 2010-11-24 吴书家 Spinning plate
CN102330234A (en) * 2011-05-25 2012-01-25 高莉萍 Polyester special yarn
CN102425037A (en) * 2011-09-29 2012-04-25 黄显飚 Environmental-friendly fiber cotton and preparation process thereof
CN103590139A (en) * 2013-10-16 2014-02-19 扬州广泰化纤有限公司 Powerful three-dimensional crimp memory fibers and production method thereof
CN106381547A (en) * 2016-08-31 2017-02-08 江苏恒力化纤股份有限公司 Porous soft polyester fiber FDY yarn and preparing method thereof
CN106400179A (en) * 2016-08-31 2017-02-15 浙江盛元化纤有限公司 Preparation method of lodging-resistant multi-difference polyester low-elastic filament

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111910288A (en) * 2020-07-13 2020-11-10 浙江恒澜科技有限公司 High-strength composite elastic fiber and preparation method thereof
CN114734697A (en) * 2022-03-19 2022-07-12 晋江市港益纤维制品有限公司 Manufacturing process of base fabric in gauze
CN114734697B (en) * 2022-03-19 2023-12-08 晋江市港益纤维制品有限公司 Manufacturing process of gauze middle base fabric

Also Published As

Publication number Publication date
CN111134379B (en) 2021-08-13

Similar Documents

Publication Publication Date Title
CN111134379B (en) Preparation method of non-glue cotton for underwear
CN106192067A (en) Bicomponent composite fiber, composite yarn and fabric having high crimp property
CN102586939A (en) Profiled fire-retardant bright terylene FDY (Fully Drawn Yarn) filament and production process thereof
CN101824664B (en) Method for preparing high-strength polyester industrial yarns
CN105544000A (en) High-temperature-oxidation-resistant composite nano PPS / Ti-SiOx short fiber and preparation method thereof
CN109234820A (en) A kind of preparation method of polylactic acid short-fiber
CN111118617B (en) Full-dull elastic yarn and preparation method thereof
KR100486812B1 (en) Lyocell multi-filament for tire cord and process for preparing the same
CN103590140A (en) Linen-imitative multiple and multi-differential composite short fiber and manufacturing method thereof
CN102660787B (en) Method for preparing poly(ethylene naphthalate) (PEN) filaments
CN111101210B (en) Natural crimped fiber and preparation method thereof
CN110983467B (en) Composite crimped fiber for knitting and preparation method thereof
CN100376733C (en) Strong conveyor belt and polyester fibre silk fabric core used thereof
CN111118700B (en) Preparation method of comfortable bandage
CN111041580B (en) PET/PBT (polyethylene terephthalate/polybutylene terephthalate) same-plate mixed filament yarn and preparation method thereof
CN111118631B (en) Preparation method of pillow inner filler
CN111041651B (en) Preparation method of bandage cloth
CN110965188B (en) Preparation method of silk-like fabric
CN110983575B (en) Preparation method of oxford fabric
KR101552697B1 (en) Method for manufacturing poly(ethyleneterephthalate) drawn fiber, poly(ethyleneterephthalate) drawn fiber and tire-cord
CN110983527A (en) Nylon 6 composite fiber and preparation method thereof
CN111118685A (en) Preparation method of core-spun yarn
CN111101270A (en) Preparation method of antibacterial sports knitted fabric
CN111058109B (en) Preparation method of swimsuit fabric
JP2011106060A (en) Polyarylene sulfide fiber

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