CN107988648B - Hot and wet comfortable polyester fiber DTY (draw textured yarn) for winter and preparation method thereof - Google Patents

Hot and wet comfortable polyester fiber DTY (draw textured yarn) for winter and preparation method thereof Download PDF

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CN107988648B
CN107988648B CN201711340311.2A CN201711340311A CN107988648B CN 107988648 B CN107988648 B CN 107988648B CN 201711340311 A CN201711340311 A CN 201711340311A CN 107988648 B CN107988648 B CN 107988648B
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cross
winter
spinneret
shaped
polyester fiber
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CN107988648A (en
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汤方明
王相明
熊克
沈建根
王力军
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Jiangsu Hengli Chemical Fiber Co Ltd
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Jiangsu Hengli Chemical Fiber Co Ltd
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • 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
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/02—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/11—Compounds containing epoxy groups or precursors thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
    • D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
    • D06M13/256—Sulfonated compounds esters thereof, e.g. sultones
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
    • D06M13/282—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing phosphorus
    • D06M13/292—Mono-, di- or triesters of phosphoric or phosphorous acids; Salts thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/53—Polyethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/32—Polyesters

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

The invention relates to a warm and humid comfortable polyester fiber DTY for winter and a preparation method thereof, wherein the preparation method comprises the following steps: the spinning melt is subjected to metering, composite spinneret plate extrusion, cooling, oiling and winding to prepare POY (polyester oriented yarn), the POY is subjected to yarn guide pipe, network, heating stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY (draw textured yarn) for winter, the material is polyester dispersed with a matte agent, and the thermal resistance of the prepared knitted fabric is more than or equal to 0.16m2DEG c/W, wet resistance less than or equal to 12 Pa.m2and/W, the composite spinneret plate is simultaneously provided with a cross-shaped spinneret orifice and a double-cross-shaped spinneret orifice, the length ratio of the cross-shaped spinneret orifice to the double-cross-shaped spinneret orifice is equal to the product of the equivalent diameter ratio and the coefficient K, the value range of the coefficient K is 0.97-1.03, the oiling oil agent contains crown ether, and the content of the crown ether is 67.30-85.58 wt%. The preparation method is simple, and the obtained fiber has excellent heat-humidity comfort performance.

Description

Hot and wet comfortable polyester fiber DTY (draw textured yarn) for winter and preparation method thereof
Technical Field
The invention belongs to the field of fiber preparation, and relates to a warm-wet comfortable polyester fiber DTY (draw textured yarn) for winter and a preparation method thereof.
Background
Along with the improvement of living standard of people, the requirements of people on fabrics are higher and higher, the clothes are required to be comfortable to wear when pursuing novel style and beautiful and elegant appearance of the clothes, the comfort is that the fabrics are in contact with people in the wearing environment, the physiological and psychological needs of people are met, the fabric comfort is the heat-humidity comfort which is the most important one, and the heat-humidity comfort is that the fabrics maintain the constant body temperature of a human body between heat and humidity transfer of people and environment, so that good conditions are provided for normal physiological functions of the human body, and the human body can keep a comfortable feeling. The heat and moisture comfort of the clothes is an important aspect of the comfort of the clothes, and refers to the heat and moisture energy exchange between the human body and the environment continuously in different climatic environments after the human body wears the clothes, and when the energy exchange reaches balance, the human body feels comfortable and satisfied clothes performance that the human body feels neither cold nor hot, nor stuffy nor wet. The clothes play an important role in regulating heat and moisture energy exchange, and the heat and moisture comfort performance of the clothes has wide application in various industries through the mutual complex effect of factors such as physics, physiology, psychology and the like along with the regulation of the clothes, so that a human body feels comfortable and satisfied in heat and moisture balance. Winter clothing mainly aims at cold protection, particularly outer layer clothing requires small heat conductivity coefficient, namely large heat resistance, large static air containing amount and small ventilation capacity, and for winter underwear, better moisture absorption and air permeability are required for maintaining good microclimate between skin and underwear for water vapor evaporation on the skin. However, the heat and moisture comfort properties of winter knits made from fibers of the prior art are still not satisfactory.
The cross section shape of the fiber influences the performance of the yarn and the fabric, profile fibers with different cross section shapes can be spun by utilizing different cross section shapes and sizes of the spinneret plate, the material and the shape characteristics of the fiber influence the performance of the fiber, the arrangement of the fiber and the fiber in the yarn influences the performance of the yarn, the arrangement of the yarn and the yarn in the fabric influences the performance of the fabric, and therefore the shape characteristics of the fiber are the essence influencing the performance of the yarn and the fabric. The profiled fiber is a chemical fiber with special section shape and function, which is spun by a spinneret orifice with a certain geometric shape. The profiled fibers developed at present are various in kind, and can be roughly classified into triangular, polygonal, flat, hollow, rhombic, etc. according to their cross-sectional shapes. The special-shaped fiber improves the hand feeling, the gloss and the mechanical property of the synthetic fiber to a certain extent, increases the contact area between the surface of the fiber and air and a human body, improves the moisture absorption and moisture release rate of the fiber, simultaneously improves the surface energy of the surface of the fiber, accelerates the evaporation rate of moisture in the moisture release process of the fabric, and takes away a large amount of heat, so that the special-shaped fiber is widely applied to cold and warm feeling fabrics to improve the moisture absorption and quick drying of the fabric. However, the sectional shape of the profiled fiber is single, the function of the profiled fiber is relatively single, the problem of poor heat and humidity comfort of the winter knitted fabric cannot be solved only by the profiled fiber section, and if the sectional shape of the profiled fiber can be diversified, the problem of poor heat and humidity comfort of the winter knitted fabric can be hopefully solved.
In recent years, the same-plate double-profiled fiber or the same-plate multi-double-profiled fiber is an important means for solving the problem of the deficiency of the existing profiled fiber, can integrate the advantages of two or more profiled fibers, and meets the requirements of people on high quality and function diversification of profiled fiber textiles. Although there are documents and patents on the same-board double profiled fiber or the same-board multiple double profiled fiber, the difficulty of the fiber in actual production is serious. Because the polyester melt is a non-Newtonian fluid and is a viscoelastic fluid, when the polyester melt flows in a viscous manner in the spinneret orifice, elastic deformation occurs to form a certain pressure, therefore, a certain pressure drop can be generated after the polyester melt flows out of the spinneret orifice, the shape, size, length and the relationship among the spinneret orifices can greatly influence the pressure drop of the spinneret orifice, the existing research generally only considers that the shapes of the spinneret orifices are the same or the cross-sectional areas are the same, but the influence among the shape, size and length does not relate to the influence among the spinneret orifices, so that the pressure drop is inconsistent when the polyester melt flows out of the spinneret orifices in different shapes of the same spinneret plate, the extrusion speed of fibers with different sections is different, and the smooth proceeding of fiber spinning processing is influenced.
Therefore, how to overcome the defect that the spinning of the same-plate double-profiled fiber or the same-plate multi-double-profiled fiber is difficult in the prior art, a fiber containing various cross-sectional shapes is prepared to obtain ideal heat and humidity comfort performance, and the use requirement of winter knitted fabrics is further met.
Disclosure of Invention
The invention aims to overcome the problem of poor heat-humidity comfort performance of knitted fabrics prepared from fibers in the prior art, and provides a winter heat-humidity comfortable polyester fiber DTY with good heat-humidity comfort performance and a preparation method thereof. According to the invention, crown ether is used in the oil agent, so that the heat resistance and lubricity of the oil agent are improved, and the quality and spinnability of the fiber are improved; the composite spinneret plate is provided with two spinneret orifices with special shapes, the lengths, the cross section areas and the cross section circumferences of the two spinneret orifices are in certain relation, smooth and stable spinning of profiled fibers on the same plate is ensured, a bundle of fibers extruded from the same spinneret plate simultaneously contain cross-shaped monofilaments and double cross-shaped monofilaments, the double cross-shaped monofilaments are provided with tubular grooves along the fiber axis direction, namely the sections of the fibers are provided with the grooves to provide a pipeline for water migration, the fabric can generate a wicking effect, the wicking is a large-scale moisture absorption phenomenon between the fibers on the basis of wetting the fabric, so that the fabric has wet comfort, the porosity of the fibers is reduced by mutually combining the double cross-shaped monofilaments and the cross-shaped monofilaments, on one hand, the wicking effect of the fibers is further increased, so that the fabric has good wet comfort, and on the other hand, the cohesion between the two monofilaments is good, the fabric has good thermal comfort, and the fiber has good thermal-wet comfort performance through the mutual matching of the two monofilaments; the mixture of amorphous titanium dioxide and amorphous silicon dioxide or the mixture of calcium carbonate and amorphous silicon dioxide is used as inorganic matte particles, and the inorganic particles are uniformly dispersed in PET to destroy the crystallization and orientation of the PET so as to enable the surface of the fiber to be in a matte state.
In order to achieve the purpose, the invention adopts the technical scheme that:
a bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains cross-shaped monofilaments and double cross-shaped monofilaments; the material of the warm and humid comfortable polyester fiber DTY for winter is polyester, and a matte agent is dispersed in the polyester;
the matting agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, or a mixture of calcium carbonate and amorphous silicon dioxide, and the matting agent is added into the polyester in the invention because: pure PET fiber, because the surface glossiness is very high, usually translucent, its glossiness is not only determined by surface reflection light, but also related to transmitted light, meanwhile the fiber glossiness is also influenced by factors such as fiber surface state, fiber cross section shape and fiber internal structure, for example, the fiber with good macromolecule orientation degree, internal structure is more uniform, fiber reflection light intensity, glossiness is bright, therefore, can adjust and control the fiber glossiness through adding inorganic particle extinction or through adjusting fiber cross section shape and surface structure. In order to make the gloss of PET fiber approach to that of cotton fiber, a delustering agent can be added in the polymerization process, the common polyester delustering agent is anatase type titanium dioxide, in order to reduce the influence of anatase type titanium dioxide crystals on the gloss of polyester, a mixture of amorphous titanium dioxide and amorphous silicon dioxide or a mixture of calcium carbonate and amorphous silicon dioxide is adopted as inorganic matte particles, the inorganic particles are uniformly dispersed in the PET, and the crystallization and orientation of the PET are damaged, so that the surface of the fiber is in a matte state;
the thermal resistance of the knitted fabric made of the warm and humid comfortable polyester fiber DTY yarn for winter is more than or equal to 0.16m2DEG c/W, the wet resistance of the knitted fabric is less than or equal to 12 Pa.m2/W。
As a preferred technical scheme:
the warm and humid comfortable polyester fiber DTY for winter is characterized in that the titer of the cross-shaped monofilament is 0.45-0.55 dtex, and the titer of the double cross-shaped monofilament is 0.60-0.70 dtex.
The warm and humid comfortable polyester fiber DTY for winter has the fineness of 75-100 dtex, the breaking strength of more than or equal to 3.8cN/dtex, the elongation at break of 33.0 +/-3.0 percent, the linear density deviation rate of less than or equal to 0.5 percent, the breaking strength CV value of less than or equal to 5.0 percent, the elongation at break CV value of less than or equal to 10.0 percent, the yarn evenness CV value of less than or equal to 2.00 percent, the boiling water shrinkage of 7.5 +/-0.5 percent and the oil content of 0.90 +/-0.20 percent.
The hot and wet comfortable polyester fiber DTY for winter has the advantages that the number of broken filaments is less than or equal to 2 per spinning cake, and the capillary parameter is more than or equal to 0.15.
The warm and humid comfortable polyester fiber DTY for winter is characterized in that the content of the matte agent in the polyester is 1-1.5 wt%, and the content of the amorphous silicon dioxide in the matte agent is 15-30 wt%.
The invention also provides a method for preparing the hot and wet comfortable polyester fiber DTY yarn for the winter, which comprises the steps of extruding, cooling, oiling and winding the spinning melt through a metering composite spinneret plate to prepare POY yarn, and preparing the hot and wet comfortable polyester fiber DTY yarn for the winter through a yarn guide pipe, a network, heating and stretching, false twisting, heat setting and winding forming of the POY yarn;
the spinning melt comprises the polyester and the matte agent;
the composite spinneret plate is provided with a cross-shaped spinneret orifice and double cross-shaped spinneret orifices at the same time, the length ratio of the micropores of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice is equal to the product of the ratio of the equivalent diameters of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, and the value range of the coefficient K is 0.97-1.03;
the oiling oil agent contains crown ether, and the content of the crown ether is 67.30-85.58 wt%. The crown ether is a heterocyclic organic compound and contains a plurality of ether groups, the wetting capacity of the crown ether surfactant is higher than that of a corresponding open-chain compound, the crown ether has better solubilization, the solubility of a salt compound in the organic compound is lower, but the addition of the crown ether can improve the solubility of the salt compound in organic matters. The common polyester or polyether compound in the oil agent has larger intermolecular action due to larger molecular weight and hydrogen bond action, and shows larger kinematic viscosity, and after the crown ether is added, the crown ether can be well compatible in the oil agent system of the polyester or polyether compound, enter between molecular chains of polyester or polyether compounds to shield acting force between the molecular chains, thereby reducing the viscosity of the oil solution system, meanwhile, the antistatic agent of the chemical fiber oil solution is mainly divided into anionic surfactant, cationic surfactant and amphoteric surfactant, most of the antistatic agent contains metal ions or exists in the form of salt, which causes poor compatibility of the antistatic agent and polyester or polyether compounds in the oil agent, and the addition of crown ether, due to the salt dissolution effect, the compatibility of the antistatic agent and polyester or polyether compounds is improved, the strength of an oil film of an oil agent is further improved, and the salt dissolution effect has great significance on the stability of spinning and the product holding capacity. Indexes of the oil agent are reflected by a comprehensive factor, so that a certain restriction is provided for the addition amount of crown ether, the advantage of the heat resistance and the oil film strength of the oil agent is not reflected by the excessively low addition amount, and other indexes are limited.
As a preferred technical scheme:
according to the method, the length of each micropore of the crossed spinneret orifice or the double-crossed spinneret orifice is 0.32-0.80 mm, and the equivalent diameter of the crossed spinneret orifice or the double-crossed spinneret orifice is 0.16-0.20 mm;
all the spinneret orifices are arranged on the spinneret plate in concentric circles, the centers of the spinneret orifices or the centers of circumscribed circles are positioned on the concentric circles, the concentric circles are concentric circles with equal intervals, and the spinneret orifices on the same ring are arranged in equal intervals;
the same ring simultaneously contains crossed spinneret orifices and double crossed spinneret orifices, and the number ratio of the crossed spinneret orifices to the double crossed spinneret orifices or the number ratio of the double crossed spinneret orifices to the crossed spinneret orifices is 1-2: 1.
According to the method, the thermal weight loss of the oil agent after the oil agent is heated and treated at 200 ℃ for 2h is less than 15wt%, the crown ether has a higher volatile point and excellent heat-resistant stability, and the heat-resistant performance of the oil agent introduced with the crown ether is also remarkably improved;
the kinematic viscosity of the oil agent is 27.5-30.1 mm at the temperature of (50 +/-0.01) ° C2The kinematic viscosity of the oil agent prepared from water into 10wt% emulsion is 0.93-0.95 mm2The crown ether can reduce the viscosity of the oil agent mainly because the crown ether has lower viscosity and is a bead-shaped micromolecule, and after the crown ether is introduced into the oil agent system, the crown ether can be well compatible in the polyester compound or polyether compound oil agent system and simultaneously enters between molecular chains of the polyester compound or polyether compound to shield the acting force between the molecular chains, so that the viscosity of the oil agent system is reduced;
the oil film strength of the oil agent is 121-127N, the oil film strength of the oil agent in the prior art is low and is generally about 110N, the main reason is that most of antistatic agents of the chemical fiber oil agent contain metal ions or exist in the form of salt, the compatibility of the antistatic agents and polyester compounds or polyether compounds in the oil agent is poor, and the crown ether can improve the oil film strength is mainly that salt solution effect can be generated after the crown ether is added, so that the compatibility of the antistatic agents and the polyester compounds or polyether compounds is improved, and the oil film strength of the oil agent is further improved;
the surface tension of the oil agent is 23.2-26.8 cN/cm, and the specific resistance is 1.0 × 108～1.8×108Ω·cm；
After oiling, the static friction coefficient between the fibers is 0.250-0.263, and the dynamic friction coefficient is 0.262-0.273;
after oiling, the static friction coefficient between the fiber and the metal is 0.202-0.210, and the dynamic friction coefficient is 0.320-0.332.
The method as described above, wherein the crown ether is 2-hydroxymethyl-12-crown-4, 15-crown-5 or 2-hydroxymethyl-15-crown-5;
the oil agent also contains mineral oil, phosphate potassium salt, trimethylolpropane laurate and alkyl sodium sulfonate;
the mineral oil is one of 9# to 17# mineral oil;
the phosphate potassium salt is dodecyl phosphate potassium salt, isomeric tridecanol polyoxyethylene ether phosphate potassium salt or dodecatetradecanol phosphate potassium salt;
the sodium alkyl sulfonate is sodium dodecyl sulfonate, sodium pentadecyl sulfonate or sodium hexadecyl sulfonate;
when the oil agent is used, preparing an emulsion with the concentration of 10-20 wt% by using water;
the preparation method of the oil agent comprises the following steps: uniformly mixing crown ether, phosphate potassium salt, trimethylolpropane laurate and sodium alkyl sulfonate, adding the mixture into mineral oil, and uniformly stirring to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight:
Figure BDA0001508225180000061
the mixing is carried out at normal temperature, the stirring temperature is 40-55 ℃, and the stirring time is 1-3 h. In the method, the main spinning process parameters of the POY yarn are as follows:
spinning temperature: 280-290 ℃;
cooling temperature: 21-24 ℃;
winding speed: 2300 to 2500 m/min;
the main spinning process parameters of the hot and wet comfortable polyester fiber DTY for winter are as follows:
spinning speed: 550-680 m/min;
T1：210～245℃；
T2：210～245℃；
and (3) air compression: 0.09-0.12 MPa;
oil wheel rotating speed: 0.50 r/min.
The invention mechanism is as follows:
the invention firstly prepares polyester dispersed with a matte agent, then a polyester melt is metered, and is extruded and cooled by a composite spinneret plate which is provided with two spinneret orifices with special shapes, and the lengths, the cross section areas and the cross section girth sizes of the two spinneret orifices are in certain relation, then the polyester melt is oiled by an oiling agent containing crown ether, and finally the winter heat and humidity comfortable polyester fiber with heat and humidity comfort performance is prepared by stretching, heat setting and winding, wherein the influence of the composite spinneret plate on the performance of the finally prepared winter heat and humidity comfortable polyester fiber DTY is as follows:
the polyester melt is a non-Newtonian fluid, is a viscoelastic fluid, and generates elastic deformation while performing viscous flow in a spinneret orifice, and the existence of the elastic deformation is one of the key factors for unstable spinning. The length, the perimeter and the cross section perimeter of the spinneret orifices, the cross section area of the spinneret orifices and the like have great influence on the storage and the relaxation degree of the elastic energy in the melt.
The calculation formula of the pressure drop of the melt when the melt passes through the spinneret orifices of the spinneret is as follows:
Figure BDA0001508225180000071
wherein, Delta P is pressure drop of the melt, S is the inner wall area of the spinneret orifice, the value is equal to the product of the length of the micropore of the spinneret orifice and the perimeter of the cross section of the spinneret orifice, SCutting blockτ is the viscous fluid shear stress of the material, which is the cross-sectional area of the orifice.
For polyester melt passing through spinneret orifices A and B with different shapes on the same spinneret plate, the pressure drop of the melt in the process of passing through different spinneret orifices must be ensured to be the same or within a certain range, namely delta P, to ensure that the extrusion speeds of the melt from different spinneret orifices are consistent or have smaller differenceA＝KΔPBAnd the coefficient K is 0.97-1.03, so that the relationship between the length of each micropore of different spinneret orifices and the perimeter and the cross-sectional area of each spinneret orifice can be deduced, namely:
Figure BDA0001508225180000072
in the formula, D is the length of the micropores of the spinneret orifice, S is the area of the cross section of the spinneret orifice, L is the perimeter of the cross section of the spinneret orifice, and B is the equivalent diameter of the spinneret orifice.
The invention ensures smooth and stable spinning by utilizing the composite spinneret plate which is provided with two spinneret orifices with special shapes and has certain relation between the lengths of the micropores, the cross section areas and the perimeter of the cross section, solves the problems of uneven fiber, uneven strength, uneven dyeing and the like caused by uneven pressure drop during extrusion molding of different melts of the profiled fiber on the same plate in the spinning process, improves the stability of a product, realizes the simultaneous extrusion of the cross-shaped monofilament and the double cross-shaped monofilament from the same spinneret plate, ensures that the finally prepared fiber has the advantages of both the cross-shaped fiber and the double cross-shaped fiber, has ideal hot and wet comfort performance and can meet the use requirement of the knitted fabric in winter.
Has the advantages that:
(1) the warm-wet comfortable polyester fiber DTY for winter has the advantages of both the cross-shaped fiber and the double-cross-shaped fiber, has good warm-wet comfort and extremely high popularization value;
(2) according to the preparation method of the warm-wet comfortable polyester fiber DTY for winter, the oiling agent containing crown ether used in the oiling process has the characteristics of low viscosity, good heat resistance, high oil film strength, good smoothness and strong antistatic property, and the spinning stability and the fiber processability are improved;
(3) according to the preparation method of the hot and wet comfortable polyester fiber DTY for winter, the lengths, the cross section areas and the cross section circumferences of the micropores of two spinneret orifices on the same spinneret plate are set, and the sizes of the two spinneret orifices are connected to each other, so that the pressure drops of polyester melt in the process of passing through different spinneret orifices are basically the same, the extrusion speeds of the melt from the spinneret orifices are basically the same, and the smooth and stable spinning is ensured;
(4) according to the preparation method of the warm-wet comfortable polyester fiber DTY for winter, the mixture of amorphous titanium dioxide and amorphous silicon dioxide or the mixture of calcium carbonate and amorphous silicon dioxide is adopted as inorganic matte particles, the inorganic particles are uniformly dispersed in PET, and the crystallization and orientation of the PET are damaged, so that the surface of the fiber is in a matte state.
Drawings
Fig. 1 is a schematic view of the arrangement of the spinneret orifices of the composite spinneret plate in example 1 of the present invention.
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.
Example 1
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 2-hydroxymethyl-12-crown-4 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, adding the mixture into No. 9 mineral oil, and uniformly stirring the mixture for 1h at 40 ℃ to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 2 parts of No. 9 mineral oil; 10 parts of trimethylolpropane laurate; 90 portions of 2-hydroxymethyl-12-crown-4; 8 parts of dodecyl phosphate potassium salt; 3 parts of sodium dodecyl sulfate; the content of crown ether in the prepared oil agent is 79.6 wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 14.5 wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 29.6mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight2The oil agent has high oil film strength of 125N, surface tension of 24.8cN/cm and specific resistance of 1.3 × 108 omega cm, the static friction coefficient (mu s) between the fiber and the fiber (F/F) is 0.255 and the dynamic friction coefficient (mu d) is 0.266 after oiling, the static friction coefficient (mu s) between the fiber and the metal (F/M) is 0.203 and the dynamic friction coefficient (mu d) is 0.320 after oiling, and the prepared oil agent is prepared into emulsion with the concentration of 15wt% by using water when in use;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.25 wt%, the content of the amorphous silicon dioxide in the matte agent is 22.5 wt%, and the spinning technological parameters of the POY yarn are as follows: spinning temperature: 285 ℃; cooling temperature: 22 ℃; winding speed: 2400 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross-shaped spinneret orifice and a double-cross-shaped spinneret orifice, the length ratio of the cross-shaped spinneret orifice to the double-cross-shaped spinneret orifice is equal to the product of the equivalent diameter ratio of the cross-shaped spinneret orifice to the double-cross-shaped spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the coefficient K is 0.99, the length of the cross-shaped spinneret orifice is 0.55mm, the length of the double-cross-shaped spinneret orifice is 0.54mm, the equivalent diameter of the cross-shaped spinneret orifice is 0.18mm, all the spinneret orifices are arranged on a concentric circle on the spinneret plate, the centers of all the spinneret orifices are positioned on the concentric circle, the concentric circles are equidistant concentric circles, the spinneret orifices on the same ring are arranged at equal intervals, the arrangement schematic diagram of the spinneret orifices is shown in figure 1, A is the cross-shaped spinneret orifice, B is the double-shaped spinneret, the number ratio of the crossed spinneret orifices to the double crossed spinneret orifices on the same ring is 1: 1;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 620 m/min; t1 is 227 ℃; t2 is 225 ℃; the air pressure is 0.11 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains cross-shaped monofilament and double cross-shaped monofilament, wherein the titer of the cross-shaped monofilament is 0.5dtex, the titer of the double cross-shaped monofilament is 0.65dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 80dtex, the breaking strength is 4.12cN/dtex, the breaking elongation is 36%, the linear density deviation rate is 0.45%, the breaking strength CV value is 4.5%, the breaking elongation CV value is 9%, and the yarn is not dryA knitted fabric (areal density of 100 g/m) made of warm and humid comfortable polyester fiber DTY for winter, having a uniformity CV value of 1.8%, a boiling water shrinkage of 8.0%, an oil content of 1.1%, a DTY yarn number of 0 yarn/cake, and a capillary parameter of 0.1592) Thermal resistance of 0.169m2DEG c/W, the wet resistance of the knitted fabric is 11.0 Pa.m2/W。
Example 2
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 15-crown ether-5, isotridecanol polyoxyethylene ether phosphate potassium salt, trimethylolpropane laurate and sodium pentadecylsulfonate at normal temperature, adding the mixture into 10# mineral oil, and uniformly stirring the mixture at 43 ℃ for 1.5 hours to obtain an oil agent, wherein the addition amount of the components is as follows in parts by weight: 2 portions of No. 10 mineral oil; 15 parts of trimethylolpropane laurate; 70 portions of 15-crown ether-5; 10 parts of isomeric tridecanol polyoxyethylene ether phosphate potassium salt; 7 parts of sodium pentadecylsulfonate; the content of crown ether in the prepared oil agent is 67.30 wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 13 wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 28.1mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight2(s) 123N, which is a high oil film strength of the oil agent, 25.1cN/cm, which is a surface tension of the oil agent, and 1.5 × 10 which is a specific resistance8Omega cm; coefficient of static friction (. mu.) between fibres (F/F) after oilings) 0.257, coefficient of dynamic friction (. mu.)d) Is 0.265; after oiling, the coefficient of static friction (μ) between the fiber and the metal (F/M)s) 0.205, coefficient of dynamic friction (. mu.)d) Is 0.323; when the prepared oil agent is used, water is used for preparing emulsion with the concentration of 14 wt%;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of calcium carbonate and amorphous silicon dioxide, the content of the matte agent in the polyester is 1 wt%, the content of the amorphous silicon dioxide in the matte agent is 15wt%, and the POY yarn has the following spinning technological parameters: spinning temperature: 280 ℃; cooling temperature: 21 ℃; winding speed: 2300 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.03, the length of the micropores of the cross-shaped spinneret orifices is 0.32mm, the length of the micropores of the double cross-shaped spinneret orifices is 0.32mm, the equivalent diameter of the double cross-shaped spinneret orifices is 0.16mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all external circles are positioned on the concentric circles which are equidistant concentric circles, the spinneret orifices on the same circular ring are arranged in equal intervals, the same circular ring simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the cross-shaped spinneret orifices to the double cross-shaped spinneret orifices on the same circular ring is 2: 1;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 550 m/min; t1 is 210 ℃; t2 is 210 ℃; the compressed air is 0.09 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains a cross-shaped monofilament and a double cross-shaped monofilament, the titer of the cross-shaped monofilament is 0.45dtex, the titer of the double cross-shaped monofilament is 0.60dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 75dtex, the breaking strength is 3.80cN/dtex, the elongation at break is 30%, the deviation rate of linear density is 0.49%, the CV value of the breaking strength is 4.5%, the CV value of the elongation at break is 9.9%, the CV value of yarn evenness is 1.98%, the shrinkage rate of boiling water is 7.0%, the oil content is 0.7%, the number of broken filaments of the DTY is 2 per filament cake, the capillary parameter is 0.15, and a knitted fabric (the area density is 300 g/m) prepared by the hot and wet comfortable polyester fiber DTY for winter2) Thermal resistance of 0.16m2DEG c/W, the wet resistance of the knitted fabric is 12 Pa.m2/W。
Example 3
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 2-hydroxymethyl-15-crown-5 with potassium dodecatetradecanol phosphate, trimethylolpropane laurate and sodium pentadecylsulfonate at normal temperature, adding the mixture into No. 11 mineral oil, and uniformly stirring the mixture at 48 ℃ for 3 hours to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 8 parts of No. 11 mineral oil; 10 parts of trimethylolpropane laurate; 85 parts of 2-hydroxymethyl-15-crown-5; 11 parts of potassium dodecatetradecanol phosphate; 5 parts of sodium pentadecylsulfonate; the content of crown ether in the prepared oil agent is 70.83 wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 11 wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 30.1mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.94mm after preparation with water as an emulsion having a concentration of 10% by weight2The oil has high oil film strength of 125N, surface tension of 23.2cN/cm, and specific resistance of 1.8 × 108Omega cm; coefficient of static friction (. mu.) between fibres (F/F) after oilings) 0.250, coefficient of dynamic friction (. mu.)d) Is 0.272; after oiling, the coefficient of static friction (μ) between the fiber and the metal (F/M)s) 0.209, coefficient of dynamic friction (. mu.)d) 0.329, and the prepared oil agent is prepared into emulsion with the concentration of 10wt% by using water when in use;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of calcium carbonate and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.5wt%, the content of the amorphous silicon dioxide in the matte agent is 30wt%, and the POY yarn has the following spinning technological parameters: spinning temperature: 290 ℃; cooling temperature: 24 ℃; winding speed: 2500 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of each spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 0.97, the length of each micropore of the cross-shaped spinneret orifices is 0.80mm, the length of each micropore of the double cross-shaped spinneret orifices is 0.80mm, the equivalent diameter of each double cross-shaped spinneret orifice is 0.20mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all the spinneret orifices are positioned on the concentric circles which are concentric circles with equal intervals, the spinneret orifices on the same ring are arranged in equal intervals, the same ring simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the double cross-shaped spinneret orifices to the cross-shaped spinneret orifices on the same ring is 1: 1;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 680 m/min; t1 is 245 ℃; t2 is 245 ℃; the air pressure is 0.12 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains a cross-shaped monofilament and a double cross-shaped monofilament, the titer of the cross-shaped monofilament is 0.55dtex, the titer of the double cross-shaped monofilament is 0.70dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 100dtex, the breaking strength is 3.81cN/dtex, the elongation at break is 30%, the deviation rate of linear density is 0.5%, the CV value of the breaking strength is 5.0%, the CV value of the elongation at break is 10.0%, the CV value of yarn evenness is 2.00%, the shrinkage rate of boiling water is 7.0%, the oil content is 0.70%, the number of broken filaments of the DTY is 2 per filament cake, the capillary parameter is 0.15, and a knitted fabric (the area density is 200 g/m) prepared by the hot and wet comfortable polyester fiber DTY for winter2) Thermal resistance of 0.161m2DEG c/W, the wet resistance of the knitted fabric is 11.9 Pa.m2/W。
Example 4
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: mixing 2-hydroxymethyl-12-crown-4 with potassium dodecyl phosphate, trimethylolpropane laurate and sodium hexadecylsulfonate at normal temperatureAdding the mixture into 12# mineral oil, and uniformly stirring for 2.5h at 40 ℃ to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 5 parts of No. 12 mineral oil; 95 parts of 2-hydroxymethyl-12-crown-4; 9 parts of dodecyl phosphate potassium salt; the hexadecyl sodium sulfonate is 2 parts. The content of crown ether in the prepared oil agent is 85.58wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 9 wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 29.5mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight2(s) the oil film strength of the oil agent is high and is 121N, the surface tension of the oil agent is 24.3cN/cm, and the specific resistance is 1.0 × 108Omega cm; coefficient of static friction (. mu.) between fibres (F/F) after oilings) 0.260, coefficient of dynamic friction (. mu.)d) Is 0.263; after oiling, the coefficient of static friction (μ) between the fiber and the metal (F/M)s) 0.202, coefficient of dynamic friction (. mu.)d) 0.330, and the prepared oil agent is prepared into an emulsion with the concentration of 19 wt% by using water when in use;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.1 wt%, the content of the amorphous silicon dioxide in the matte agent is 18 wt%, and the spinning technological parameters of the POY yarn are as follows: spinning temperature: 282 ℃; cooling temperature: 21 ℃; winding speed: 2450 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 0.98, the length of the micropores of the cross-shaped spinneret orifices is 0.34mm, the length of the micropores of the double cross-shaped spinneret orifices is 0.35mm, the equivalent diameter of the double cross-shaped spinneret orifices is 0.18mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all the spinneret orifices are positioned on the concentric circles which are concentric circles with equal intervals, the spinneret orifices on the same ring are arranged in equal intervals, the same ring simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the double cross-shaped spinneret orifices to the cross-shaped spinneret orifices on the same ring is 1.2: 1;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 580-m/min; t1 is 215 ℃; t2 is 216 ℃; the air pressure is 0.10 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains cross-shaped monofilament and double cross-shaped monofilament, wherein the titer of the cross-shaped monofilament is 0.47dtex, the titer of the double cross-shaped monofilament is 0.62dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 80dtex, the breaking strength is 3.82cN/dtex, the elongation at break is 32%, the deviation rate of linear density is 0.46%, the CV value of the breaking strength is 4.6%, the CV value of the elongation at break is 9.8%, the CV value of yarn evenness is 1.90%, the shrinkage rate of boiling water is 7.2%, the oil content is 0.80%, the number of broken filaments of the DTY is 1 per filament cake, the capillary parameter is 0.152, and the knitted fabric prepared from the hot and wet comfortable polyester fiber DTY for winter (the surface density is 240 g/m)2) Thermal resistance of 0.162m2DEG c/W, the wet resistance of the knitted fabric is 11.8 Pa.m2/W。
Example 5
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 15-crown ether-5, isotridecanol polyoxyethylene ether phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, adding the mixture into 13# mineral oil, and uniformly stirring the mixture for 2 hours at 52 ℃ to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 10 parts of No. 13 mineral oil; 5 parts of trimethylolpropane laurate; 70 portions of 15-crown ether-5; 8 parts of isomeric tridecanol polyoxyethylene ether phosphate potassium salt; 6 parts of sodium dodecyl sulfate. The content of crown ether in the prepared oil agent is 70.70 wt%, and the oil agent has high temperature resistanceThe performance is excellent, and the thermal weight loss is 13.5 wt% after the heating treatment is carried out for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 28.6mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.95mm after preparation with water as an emulsion having a concentration of 10% by weight2The oil has high oil film strength of 126N, surface tension of 24.9cN/cm, and specific resistance of 1.2 × 108Omega cm; coefficient of static friction (. mu.) between fibres (F/F) after oilings) 0.251, coefficient of dynamic friction (. mu.)d) Is 0.262; after oiling, the coefficient of static friction (μ) between the fiber and the metal (F/M)s) 0.202, coefficient of dynamic friction (. mu.)d) 0.332, and the prepared oil agent is prepared into an emulsion with the concentration of 11 wt% by using water when in use;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.2 wt%, the content of the amorphous silicon dioxide in the matte agent is 20wt%, and the spinning technological parameters of the POY yarn are as follows: spinning temperature: 286 ℃; cooling temperature: 22 ℃; winding speed: 2480 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 0.99, the length of the micropores of the cross-shaped spinneret orifice is 0.42mm, the length of the micropores of the double-cross-shaped spinneret orifice is 0.43mm, the equivalent diameter of the double-cross-shaped spinneret orifice is 0.19mm, all the spinneret orifices are arranged on the spinneret plate in concentric circles, the centers of all the external circles are positioned on the concentric circles which are equidistant concentric circles, the spinneret orifices on the same circular ring are arranged in equal intervals, the same circular ring simultaneously contains the cross-shaped spinneret orifices and the double-cross-shaped spinneret orifices, and the number ratio of the double-cross-shaped spinneret orifices to the cross-shaped spinneret orifices on the same circular ring is 1;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 600 m/min; t1 is 220 ℃; t2 is 225 ℃; the air pressure is 0.11 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains a cross-shaped monofilament and a double cross-shaped monofilament, the titer of the cross-shaped monofilament is 0.48dtex, the titer of the double cross-shaped monofilament is 0.63dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 85dtex, the breaking strength is 3.84cN/dtex, the elongation at break is 33%, the deviation rate of linear density is 0.47%, the CV value of the breaking strength is 4.8%, the CV value of the elongation at break is 9.6%, the CV value of yarn evenness is 1.85%, the shrinkage rate of boiling water is 7.4%, the oil content is 0.90%, the number of broken filaments of the DTY is 1 per filament cake, the capillary parameter is 0.153, and a knitted fabric prepared from the hot and wet comfortable polyester fiber DTY for winter (the areal density is 140 g/m)2) Thermal resistance of 0.164m2DEG c/W, the wet resistance of the knitted fabric is 11.5 Pa.m2/W。
Example 6
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 2-hydroxymethyl-15-crown-5 with potassium dodecatetradecanol phosphate, trimethylolpropane laurate and sodium pentadecylsulfonate at normal temperature, adding the mixture into No. 14 mineral oil, and uniformly stirring the mixture at 55 ℃ for 1h to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 3 parts of No. 14 mineral oil; 10 parts of trimethylolpropane laurate; 75 parts of 2-hydroxymethyl-15-crown-5; 14 parts of potassium dodecatetradecanol phosphate; and 7 parts of sodium pentadecylsulfonate. The content of crown ether in the prepared oil agent is 68.80 wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 12 wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 27.5mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.95mm after preparation with water as an emulsion having a concentration of 10% by weight2The oil has high oil film strength of 126N, surface tension of 25.4cN/cm and specific resistance of 1.6×108Omega cm; coefficient of static friction (. mu.) between fibres (F/F) after oilings) 0.255, coefficient of dynamic friction (. mu.)d) Is 0.267; after oiling, the coefficient of static friction (μ) between the fiber and the metal (F/M)s) 0.203, coefficient of dynamic friction (. mu.)d) 0.330, and the prepared oil agent is prepared into an emulsion with the concentration of 20wt% by using water when in use;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.3 wt%, the content of the amorphous silicon dioxide in the matte agent is 22 wt%, and the spinning technological parameters of the POY yarn are as follows: spinning temperature: 286 ℃; cooling temperature: 23 ℃; winding speed: 2320 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.01, the length of the micropores of the cross-shaped spinneret orifice is 0.56mm, the length of the micropores of the double cross-shaped spinneret orifice is 0.56mm, the equivalent diameter of the cross-shaped spinneret orifice is 0.20mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all external circles are positioned on the concentric circles which are concentric circles with equal intervals, the spinneret orifices on the same circular circle are arranged in equal intervals, the same circular circle simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the double cross-shaped spinneret orifices to the cross-shaped spinneret orifices on the same circular circle is 2;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 620 m/min; t1 is 230 ℃; t2 is 232 ℃; the air pressure is 0.12 MPa; the rotation speed of the oil tanker is 0.50 r/min.
Finally prepared is extruded by the same spinneret plateThe warm and humid comfortable polyester fiber DTY for bundle winter simultaneously contains a cross-shaped monofilament and a double cross-shaped monofilament, the titer of the cross-shaped monofilament is 0.51dtex, the titer of the double cross-shaped monofilament is 0.65dtex, the titer of the warm and humid comfortable polyester fiber DTY for winter is 86dtex, the breaking strength is 3.9cN/dtex, the elongation at break is 34%, the deviation rate of linear density is 0.48%, the CV value of the breaking strength is 4.7%, the CV value of the elongation at break is 9.6%, the CV value of yarn evenness is 1.86%, the shrinkage rate of boiling water is 7.6%, the oil content is 1.03%, the number of the wool yarns of the DTY is 1/cake, the capillary parameter is 0.156, and a knitted fabric (the surface density is 180 g/m) made of the warm and humid comfortable polyester fiber DTY for winter is provided2) Thermal resistance of 0.166m2DEG c/W, the wet resistance of the knitted fabric is 11.6 Pa.m2/W。
Example 7
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 15-crown ether-5 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium hexadecylsulfonate at normal temperature, adding the mixture into 15# mineral oil, and uniformly stirring the mixture for 2 hours at 41 ℃ to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 8 parts of No. 15 mineral oil; 20 parts of trimethylolpropane laurate; 100 portions of 15-crown ether-5; 15 parts of dodecyl phosphate potassium salt; the hexadecyl sodium sulfonate is 2 parts. The content of crown ether in the prepared oil agent is 68.97 wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 8.5 wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 28.4mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.94mm after preparation with water as an emulsion having a concentration of 10% by weight2(s) the oil film strength of the oil agent is high and is 122N, the surface tension of the oil agent is 26.8cN/cm, and the specific resistance is 1.8 × 108Omega cm; coefficient of static friction (. mu.) between fibres (F/F) after oilings) 0.263, coefficient of dynamic friction (. mu.)d) Is 0.268; after oiling, the coefficient of static friction (μ) between the fiber and the metal (F/M)s) 0.210, coefficient of dynamic friction (. mu.)d) 0.320, the prepared oil agent is prepared into emulsion with the concentration of 13 wt% by using water；
(2) The POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of calcium carbonate and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.4 wt%, the content of the amorphous silicon dioxide in the matte agent is 23 wt%, and the POY yarn has the following spinning technological parameters: spinning temperature: 288 ℃; cooling temperature: 24 ℃; winding speed: 2350 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.02, the length of the micropores of the cross-shaped spinneret orifices is 0.71mm, the length of the micropores of the double cross-shaped spinneret orifices is 0.70mm, the equivalent diameter of the cross-shaped spinneret orifices is 0.17mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all the spinneret orifices are positioned on the concentric circles which are concentric circles with equal intervals, the spinneret orifices on the same circular ring are arranged in equal intervals, the same circular ring simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the cross-shaped spinneret orifices to the double cross-shaped spinneret orifices on the same circular ring is;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 630 m/min; t1 is 230 ℃; t2 is 235 ℃; the compressed air is 0.09 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains cross-shaped monofilament and double cross-shaped monofilament, wherein the titer of the cross-shaped monofilament is 0.54dtex, the titer of the double cross-shaped monofilament is 0.66dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 90dtex, the breaking strength is 3.95cN/dtex, the elongation at break is 35%, the deviation rate of linear density is 0.45%, the CV value of the breaking strength is 4.6%, and the CV value of the elongation at break is 3.95cN/dtex9.3%, a yarn evenness CV value of 1.84%, a boiling water shrinkage of 7.7%, an oil content of 1.05%, a number of filaments of DTY of 1 per cake, a capillary parameter of 0.157, a knitted fabric (areal density of 190 g/m) made of a warm and humid comfortable polyester fiber DTY for winter2) Thermal resistance of 0.167m2DEG c/W, the wet resistance of the knitted fabric is 11.3 Pa.m2/W。
Example 8
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 2-hydroxymethyl-12-crown-4 with potassium dodecatetradecanol phosphate, trimethylolpropane laurate and sodium pentadecylsulfonate at normal temperature, adding the mixture into No. 16 mineral oil, and uniformly stirring the mixture at 45 ℃ for 3 hours to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 9 parts of No. 16 mineral oil; 80 portions of 2-hydroxymethyl-12-crown-4; 12 parts of potassium dodecatetradecanol phosphate; 5 parts of sodium pentadecylsulfonate. The content of crown ether in the prepared oil agent is 83.33 wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 14 wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 30.0mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight2The oil has high oil film strength of 127N, surface tension of 23.5cN/cm, and specific resistance of 1.5 × 108Omega cm; after oiling, the static friction coefficient (mus) between the fibers (F/F) was 0.262 and the dynamic friction coefficient (μ d) was 0.273; after oiling, the static friction coefficient (mu s) between the fiber and the metal (F/M) is 0.208, the dynamic friction coefficient (mu d) is 0.328, and the prepared oil agent is prepared into emulsion with the concentration of 18 wt% by using water when in use;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.5wt%, the content of the amorphous silicon dioxide in the matte agent is 26 wt%, and the spinning technological parameters of the POY yarn are as follows: spinning temperature: 290 ℃; cooling temperature: 24 ℃; winding speed: 2370 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of each spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.03, the length of each micropore of the cross-shaped spinneret orifices is 0.74mm, the length of each micropore of the double cross-shaped spinneret orifices is 0.74mm, the equivalent diameter of each cross-shaped spinneret orifice is 0.16mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all the spinneret orifices are positioned on the concentric circles which are concentric circles with equal intervals, the spinneret orifices on the same circular ring are arranged in equal intervals, the same circular ring simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the cross-shaped spinneret orifices to the double cross-shaped spinneret orifices on the same circular ring is;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 670 m/min; t1 is 240 ℃; t2 is 240 ℃; the air pressure is 0.11 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains a cross-shaped monofilament and a double cross-shaped monofilament, the titer of the cross-shaped monofilament is 0.54dtex, the titer of the double cross-shaped monofilament is 0.68dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 86dtex, the breaking strength is 4.0cN/dtex, the elongation at break is 35.5%, the linear density deviation rate is 0.455%, the breaking strength CV value is 4.5%, the elongation at break CV value is 9.2%, the yarn evenness irregularity CV value is 1.81%, the boiling water shrinkage rate is 7.8%, the oil content is 1.08%, the number of the broken filaments of the DTY is 0/cake, the capillary parameter is 0.159, and a knitted fabric prepared from the hot and wet comfortable polyester fiber DTY for winter (the area density is 220 g/m)2) Thermal resistance of 0.168m2DEG c/W, the wet resistance of the knitted fabric is 11.1 Pa.m2/W。
Example 9
A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter comprises the following steps:
(1) preparation of oiling oil agent: uniformly mixing 2-hydroxymethyl-15-crown-5 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, and uniformly stirring at 55 ℃ for 3 hours to obtain an oil agent, wherein the adding amount of each component is as follows in parts by weight: 15 parts of trimethylolpropane laurate; 90 portions of 2-hydroxymethyl-15-crown-5; 8 parts of dodecyl phosphate potassium salt; 7 parts of sodium dodecyl sulfate. The content of crown ether in the prepared oil agent is 81.81 wt%, the high temperature resistance of the oil agent is excellent, and the thermal weight loss is 10wt% after the oil agent is heated for 2 hours at 200 ℃; the viscosity of the oil agent is low, and the kinematic viscosity is 29.7mm at the temperature of (50 +/-0.01) ° C2(s) a kinematic viscosity of 0.94mm after preparation with water as an emulsion having a concentration of 10% by weight2The oil has high oil film strength of 126N, surface tension of 24.8cN/cm, and specific resistance of 1.8 × 108Omega cm; coefficient of static friction (. mu.) between fibres (F/F) after oilings) 0.250, coefficient of dynamic friction (. mu.)d) Is 0.264; after oiling, the coefficient of static friction (μ) between the fiber and the metal (F/M)s) 0.210, coefficient of dynamic friction (. mu.)d) 0.321, when the prepared oil agent is used, water is used for preparing emulsion with the concentration of 10 wt%;
(2) the POY yarn is prepared by metering, extruding by a composite spinneret plate, cooling, oiling and winding a spinning melt, wherein the spinning melt comprises polyester and a matte agent, the matte agent is dispersed in the polyester and is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.4 wt%, the content of the amorphous silicon dioxide in the matte agent is 28 wt%, and the spinning technological parameters of the POY yarn are as follows: spinning temperature: 290 ℃; cooling temperature: 24 ℃; winding speed: 2400 m/min;
wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.02, the length of the micropores of the cross-shaped spinneret orifices is 0.76mm, the length of the micropores of the double cross-shaped spinneret orifices is 0.76mm, the equivalent diameter of the cross-shaped spinneret orifices is 0.18mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all external circles are positioned on the concentric circles which are concentric circles with equal intervals, the spinneret orifices on the same circular ring are arranged in equal intervals, the same circular ring simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the cross-shaped spinneret orifices to the double cross-shaped spinneret orifices on the same circular ring is 1;
(3) the POY is processed by a yarn guide tube, a network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter, wherein the spinning technological parameters of the DTY are as follows: the spinning speed is 550 m/min; t1 is 245 ℃; t2 is 230 ℃; the air pressure is 0.11 MPa; the rotation speed of the oil tanker is 0.50 r/min.
The finally prepared bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains a cross-shaped monofilament and a double cross-shaped monofilament, the titer of the cross-shaped monofilament is 0.51dtex, the titer of the double cross-shaped monofilament is 0.65dtex, the titer of the hot and wet comfortable polyester fiber DTY for winter is 90dtex, the breaking strength is 4.05cN/dtex, the elongation at break is 36%, the deviation rate of linear density is 0.45%, the CV value of the breaking strength is 4.6%, the CV value of the elongation at break is 9.0%, the CV value of yarn evenness is 1.81%, the shrinkage rate of boiling water is 7.9%, the oil content is 1.1%, the number of broken filaments of the DTY is 0/cake, the capillary parameter is 0.159, and a knitted fabric (the area density is 260 g/m) prepared by the hot and wet comfortable polyester fiber DTY for winter2) Thermal resistance of 0.168m2DEG c/W, the wet resistance of the knitted fabric is 11 Pa.m2/W。

Claims (9)

1. A preparation method of a warm and humid comfortable polyester fiber DTY yarn for winter is characterized by comprising the following steps: the spinning melt is subjected to metering, composite spinneret plate extrusion, cooling, oiling and winding to prepare POY (polyester pre-oriented yarn), and the POY is subjected to yarn guide pipe, network, heating and stretching, false twisting, heat setting and winding forming to prepare the hot and wet comfortable polyester fiber DTY for winter;
the spinning melt comprises polyester and a matte agent;
a matte agent is dispersed in the polyester;
the matting agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, or a mixture of calcium carbonate and amorphous silicon dioxide;
the composite spinneret plate is provided with a cross-shaped spinneret orifice and double cross-shaped spinneret orifices at the same time, the length ratio of the micropores of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice is equal to the product of the ratio of the equivalent diameters of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, and the value range of the coefficient K is 0.97-1.03;
the oiling oil agent contains crown ether, and the content of the crown ether is 67.30-85.58 wt%;
the crown ether is 2-hydroxymethyl-12-crown-4, 15-crown ether-5 or 2-hydroxymethyl-15-crown-5;
when the oil agent is used, preparing an emulsion with the concentration of 10-20 wt% by using water;
the thermal weight loss of the oil agent after heating treatment for 2 hours at 200 ℃ is less than 15 wt%;
the kinematic viscosity of the oil agent is 27.5-30.1 mm at the temperature of (50 +/-0.01) ° C2The kinematic viscosity of the oil agent prepared from water into 10wt% emulsion is 0.93-0.95 mm2/s；
The oil film strength of the oil agent is 121-127N;
the surface tension of the oil agent is 23.2-26.8 cN/cm, and the specific resistance is 1.0 × 108~1.8×108Ω·cm；
After oiling, the static friction coefficient between the fibers is 0.250-0.263, and the dynamic friction coefficient is 0.262-0.273;
after oiling, the static friction coefficient between the fiber and the metal is 0.202-0.210, and the dynamic friction coefficient is 0.320-0.332.
2. The method for preparing hot and humid comfortable polyester fiber DTY for winter as claimed in claim 1, wherein the length of the micro-hole of the cross-shaped spinneret hole or the double cross-shaped spinneret hole is 0.32 to 0.80mm, and the equivalent diameter of the cross-shaped spinneret hole or the double cross-shaped spinneret hole is 0.16 to 0.20 mm;
all the spinneret orifices are arranged on the spinneret plate in concentric circles, the centers of the spinneret orifices or the centers of circumscribed circles are positioned on the concentric circles, the concentric circles are concentric circles with equal intervals, and the spinneret orifices on the same ring are arranged in equal intervals;
the same ring simultaneously contains crossed spinneret orifices and double crossed spinneret orifices, and the number ratio of the crossed spinneret orifices to the double crossed spinneret orifices or the number ratio of the double crossed spinneret orifices to the crossed spinneret orifices is 1-2: 1.
3. The preparation method of the warm and humid comfortable polyester fiber DTY yarn for winter as claimed in claim 1, wherein the oil agent comprises the following components in parts by weight:
0-10 parts of mineral oil;
0-20 parts of trimethylolpropane laurate;
70-100 parts of crown ether;
8-15 parts of phosphate potassium salt;
2-7 parts of sodium alkylsulfonate;
the preparation method of the oil agent comprises the following steps: uniformly mixing all the components and then uniformly stirring to obtain an oil agent;
the mixing is carried out at normal temperature, the stirring temperature is 40-55 ℃, and the stirring time is 1-3 h.
4. The preparation method of the warm and humid comfortable polyester fiber DTY yarn for winter as claimed in any one of claims 1 to 3, wherein the POY yarn has the following main spinning process parameters:
spinning temperature: 280-290 ℃;
cooling temperature: 21-24 ℃;
winding speed: 2300 to 2500 m/min;
the main spinning process parameters of the hot and wet comfortable polyester fiber DTY for winter are as follows:
spinning speed: 550-680 m/min;
T1：210~245℃；
T2：210~245℃；
and (3) air compression: 0.09-0.12 MPa;
oil wheel rotating speed: 0.50 r/min.
5. The method for preparing the warm and humid comfortable polyester fiber DTY for winter as claimed in claim 1, wherein the method comprises the following steps: a bundle of hot and wet comfortable polyester fiber DTY for winter extruded by the same spinneret plate simultaneously contains a cross-shaped monofilament and a double cross-shaped monofilament; the thermal resistance of the knitted fabric made of the warm and humid comfortable polyester fiber DTY yarn for winter is more than or equal to 0.16m2DEG c/W, the wet resistance of the knitted fabric is less than or equal to 12 Pa.m2/W。
6. The method for preparing hot and humid comfortable polyester fiber DTY yarn for winter as claimed in claim 5, wherein titer of the cross-shaped monofilament is 0.45-0.55 dtex, and titer of the double cross-shaped monofilament is 0.60-0.70 dtex.
7. The method for preparing the hot and humid comfortable polyester fiber DTY yarn for winter according to claim 5 or 6, wherein the fineness of the hot and humid comfortable polyester fiber DTY yarn for winter is 75-100 dtex, the breaking strength is more than or equal to 3.8cN/dtex, the elongation at break is 33.0 +/-3.0%, the deviation rate of linear density is less than or equal to 0.5%, the CV value of the breaking strength is less than or equal to 5.0%, the CV value of the elongation at break is less than or equal to 10.0%, the CV value of the yarn evenness is less than or equal to 2.00%, the shrinkage rate of boiling water is 7.5 +/-0.5%, and the oil content is 0.90 +/-0.20%.
8. The preparation method of the warm and humid comfortable polyester fiber DTY for winter as claimed in claim 7, wherein the number of the filaments of the warm and humid comfortable polyester fiber DTY for winter is less than or equal to 2 filaments/cake, and the capillary parameter is greater than or equal to 0.15.
9. The method for preparing hot and humid comfortable polyester fiber DTY yarn for winter as claimed in claim 5 or 6, wherein the content of said matte agent in polyester is 1-1.5 wt%, and the content of amorphous silica in said matte agent is 15-30 wt%.
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