Moisture-absorbing sweat-permeable chenille yarn and production process thereof

Abstract

The invention discloses a moisture-absorbing sweat-permeable chenille yarn and a production process thereof. The moisture-absorbing sweat-permeable chenille yarn comprises a core yarn and a camlet, the camlet is viscose; the core wire comprises the following raw materials: modified PET and a flame retardant. Hydrophilic amide groups, ether groups and tertiary amine groups are introduced into modified PET, regularity of PET macromolecular chains is destroyed, the proportion of amorphous regions is increased, water molecules are easier to diffuse into fiber macromolecules, the moisture absorption capacity of the chenille yarn is improved, viscose for camlet has good air permeability, and the air permeability and sweat absorption effects of the chenille yarn are good. The synthesized flame retardant comprises a DOPO structure, an organic silicon structure, a hydantoin structure and an alcoholic hydroxyl group, the DOPO structure and the organic silicon structure achieve synergistic flame retardance in a condensation phase, the hydantoin structure has the antibacterial property, and the flame retardance and the antibacterial property of the chenille yarn are improved. In conclusion, the chenille yarn prepared by the method is excellent in moisture absorption and sweat permeability, flame retardance and antibacterial property.

Description

Technical Field

[0001] The invention relates to the technical field of textile manufacturing, in particular to a moisture-absorbing and sweat-permeable chenille yarn and a production process thereof. Background Art

[0002] Polyethylene terephthalate (PET) has a very regular macromolecular chain structure, and the fiber has high crystallinity and orientation. Its macromolecular chain is composed of ester groups, rigid benzene rings and flexible methylene segments. The polarity between the ester group and the benzene ring allows the two to form a conjugated structure. Therefore, the macromolecular chain of PET has a certain rigidity. PET fiber is widely used in home textiles, clothing, decoration and other fields due to its high strength, good elasticity, good wear resistance and low cost. Chenille yarn in the textile field is a new type of fancy yarn, which is composed of core yarn and feather yarn. The core yarn is generally PAN fiber, PET fiber, etc., and the feather yarn is generally viscose fiber, cotton fiber, etc. Due to the lack of hydrophilic groups in the macromolecular chain of PET fiber, the chenille yarn made from PET fiber has poor hygroscopicity, and the air permeability of PET fiber is poor, which is not conducive to the improvement of the air permeability and sweat absorption function of chenille yarn. In addition, since the chemical composition of PET does not have flame retardant characteristics and is easy to burn, there are great safety hazards during use and transportation. Furthermore, when chenille yarn is used for sofa covers, bed blankets, carpets and automotive interior fabrics, higher requirements are placed on its antibacterial properties, but PET has poor antibacterial properties.

[0003] In summary, a suitable modification method is needed to improve the comprehensive performance of PET fiber for chenille yarn in order to solve the problems encountered in actual use. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a moisture-absorbing and sweat-permeable chenille yarn and a production process thereof.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A moisture-absorbing and sweat-permeable chenille yarn, comprising a core yarn and a feather yarn; the feather yarn is viscose fiber; the core yarn comprises modified PET and a flame retardant as raw materials; The production process of the moisture-absorbing and sweat-permeable chenille yarn comprises the following steps: Step S1: placing the modified PET at 120° C. and vacuum drying for 12-14 hours to obtain a dried modified PET; melt-blending the dried modified PET and the flame retardant in a twin-screw blending extruder at a speed of 15 r / min and a temperature of 255-265° C. for 30-40 minutes to obtain a flame retardant masterbatch; the amount ratio of the modified PET to the flame retardant is 80 g:20 g; Step S2: Take the modified PET and the flame retardant masterbatch and dry them in a vacuum oven at 100°C for 3 hours, then transfer them to a vacuum drum oven and dry them at 120°C for 24 hours to obtain modified PET and flame retardant masterbatch with low moisture content; feed the modified PET with low moisture content through a feed hopper, and after melting, pass through the screw, die, metering pump and spinning assembly in sequence, and then prepare the core wire through side blowing, oiling, drawing and winding. The melting temperature is 240-260°C, the spinning temperature is 275-295°C, and the winding speed is 1200m / min; the dosage ratio of modified PET and flame retardant masterbatch is 20g:65-75g:5-15g; Step S3: clamp the feather yarn between the two core threads, and twist and weave to obtain the moisture-absorbing and sweat-permeable chenille yarn.

[0006] The modified PET is prepared by the following steps: Step A1: 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then p-cyanobenzoyl chloride is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is completed, the temperature is raised to 40°C, the reaction is carried out at a constant temperature for 8-10 hours, and the reaction is distilled under reduced pressure to obtain a reaction product 1; Further, the usage ratio of 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide is 0.1 mol: 0.01-0.015 mol: 100-110 mL; the usage ratio of p-cyanobenzoyl chloride and dimethyl sulfoxide is 0.1 mol: 30-40 mL; During the reaction of step A1, the amino group of 3-aminomethyl-tetrahydrofuran reacts with p-cyanobenzoyl chloride to generate reaction product 1; Step A2: Add the reaction product 1 to tetrahydrofuran, start stirring, add Raney nickel and Pd / C, introduce hydrogen, and stir the mixture under normal pressure for 48 hours to obtain the reaction product 2; Further, the amount ratio of the reaction product 1, tetrahydrofuran, Raney nickel and Pd / C is 0.1 mol: 80-90 mL: 0.01 mol: 0.01-0.015 mol; During the reaction of step A2, the cyano group of the reaction product 1 is reduced to an amino group to obtain the reaction product 2; Step A3: Add N-hydroxymethyl acrylamide and anhydrous ethanol into a flask, slowly add the reaction product 2 at 25°C under nitrogen protection, then heat to 105°C, reflux and stir to react for 48 hours, and vacuum dry at 50°C to obtain the reaction product 3; Further, the amount ratio of N-hydroxymethyl acrylamide, anhydrous ethanol and reaction product 2 is 0.27 mol: 200-220 mL: 0.1-0.14 mol; During the reaction of step A3, the amino group of the reaction product 2 undergoes a Michael addition reaction with the carbon-carbon double bond of N-hydroxymethyl acrylamide to generate a reaction product 3 containing two symmetrical alcoholic hydroxyl groups; Step A4: Add terephthalic acid, ethylene glycol, and reaction product 3 to a reactor, then add antimony trioxide and trimethyl phosphite, evacuate and replace with nitrogen twice, start stirring in a nitrogen atmosphere, control the temperature in the reactor to 230-250° C., and the pressure in the reactor to 300-360 kPa, stir and react for 5.5-6.5 hours, and adjust the pressure in the reactor to normal pressure; then slowly heat up to 270° C., evacuate for 50 minutes, control the temperature in the reactor to 270-275° C., and the vacuum degree in the reactor to 50-60 MPa, and continue the polycondensation reaction for 2.5-3 hours to obtain modified PET; Further, the usage ratio of terephthalic acid, ethylene glycol, reaction product 3, antimony trioxide and trimethyl phosphite is 1 mol: 1.14: 0.06: 0.005-0.0.008 mol: 0.0015-0.0024 mol; In the reaction process of step A4, terephthalic acid, ethylene glycol and reaction product 3 are first subjected to an esterification reaction at 230-250° C., and then subjected to a polycondensation reaction at 270-275° C. to obtain modified PET.

[0007] The flame retardant is prepared by the following steps: Step B1: Add 1-allylhydantoin, glacial acetic acid and phosphoric acid into a flask, start stirring, add hydrogen peroxide within 30-40 minutes, stir and react at 50°C for 4-5 hours, wash with deionized water until neutral, and distill under reduced pressure to obtain reaction product a; Further, the usage ratio of 1-allylhydantoin, glacial acetic acid, phosphoric acid and hydrogen peroxide is 1 g: 0.15 g: 0.01 g: 0.8 g; During the reaction of step B1, the carbon-carbon double bond in 1-allylhydantoin is oxidized to an epoxy group to obtain a reaction product a; Step B2: Add the reaction product a and DOPO to a flask, start stirring and heat to 80-90°C, add triphenylphosphine after 20-30 minutes, continue to heat to 140-150°C, stir and react at constant temperature for 3-4 hours, cool to room temperature, add ethyl acetate to the flask, let stand for 48 hours, filter, and obtain the reaction product b; Further, the usage ratio of the reaction product a, DOPO, triphenylphosphine and ethyl acetate is 0.1 mol: 0.1-0.15 mol: 0.005-0.008 mol: 80-90 mL; During the reaction of step B2, the epoxy group of the reaction product a undergoes a ring-opening reaction with DOPO to generate a reaction product b; Step B3: Add the epoxy-terminated silicone oil and the reaction product b into methanol, start reflux stirring, then add trimethylamine, reflux stirring and react at 100-120° C. for 3-4 hours to obtain a flame retardant; Further, the usage ratio of the epoxy-terminated silicone oil, the reaction product b, methanol and trimethylamine is 0.1 mol: 0.2 mol: 150-170 mL: 0.01-0.015 mol; During the reaction of step B3, under the catalytic action of trimethylamine, the epoxy group of the epoxy-terminated silicone oil reacts with the hydroxyl group of the reaction product b to generate a flame retardant.

[0008] Beneficial effects of the invention: The invention discloses a moisture-absorbing and sweat-permeable chenille yarn, comprising a core yarn and a feather yarn, wherein the feather yarn is viscose fiber, and the core yarn is made of modified PET and a flame retardant. First, a structurally symmetrical diol is synthesized by reaction, and the diol is used to partially replace ethylene glycol, participate in the esterification reaction and polycondensation reaction with terephthalic acid, and obtain modified PET, and amide groups, ether groups and tertiary amine groups are introduced into the PET structure; the amide groups, ether groups and tertiary amine groups are hydrophilic, and the introduction of the synthesized diol destroys the regularity of the PET macromolecular chain, resulting in a decrease in the crystallinity of the modified PET, an increase in the proportion of the amorphous region, and water molecules are more easily diffused into the fiber macromolecules, thereby improving the moisture absorption capacity of the core yarn. The viscose fiber for the feather yarn has good air permeability. Therefore, the moisture absorption capacity of the chenille yarn made of the core yarn and the feather yarn is enhanced, and the sweat of the skin can be quickly absorbed to restore the body temperature to normal, so as to achieve the effects of air permeability and sweat absorption, thereby making the chenille yarn have good moisture absorption and sweat permeability.

[0009] The synthesized flame retardant includes DOPO structure, silicone structure, hydantoin structure and alcohol hydroxyl group; the hydantoin structure has a broad-spectrum antibacterial activity, has an inhibitory effect on bacteria and fungi, and has efficient and stable antibacterial performance, thereby improving the antibacterial property of chenille yarn; when the matrix burns, the DOPO structure dehydrates and degrades the polymer surface to form a carbon layer, and the phosphorus-containing derivatives produced at the same time cover the polymer surface, isolate the combustible gas, block the heat transfer, form a physical shield, and play a condensed phase flame retardant role; during the combustion process, the silicone structure continuously migrates to the combustion surface to form a ceramic carbon layer, making the condensed phase carbon layer more compact, and forming a synergistic effect with the DOPO structure in the condensed phase flame retardant process; the nitrogen element in the hydantoin structure forms a non-combustible gas during combustion, dilutes the combustible gas, and prevents the combustion from continuing in the gas phase; during the melt blending process of the modified PET and the flame retardant, the flame retardant containing polar groups such as alcohol hydroxyl groups has better compatibility with the modified PET containing polar amide groups, which is conducive to the uniform dispersion of the flame retardant in the modified PET. DETAILED DESCRIPTION

[0010] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0011] A modified PET, the preparation of which comprises the following steps: Step A1: 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then p-cyanobenzoyl chloride is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is completed, the temperature is raised to 40°C, and the reaction is carried out at a constant temperature for 8 hours. The reaction product 1 is obtained by distillation under reduced pressure. The amount ratio of 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide is 0.1 mol: 0.01 mol: 100 mL; the amount ratio of p-cyanobenzoyl chloride and dimethyl sulfoxide is 0.1 mol: 30 mL. Step A2: adding the reaction product 1 to tetrahydrofuran, starting stirring, adding Raney nickel and Pd / C, introducing hydrogen, stirring and reacting at normal pressure for 48 hours, to obtain the reaction product 2; the amount ratio of the reaction product 1, tetrahydrofuran, Raney nickel and Pd / C is 0.1 mol: 80 mL: 0.01 mol: 0.01 mol; Step A3: N-hydroxymethyl acrylamide and anhydrous ethanol were added to a flask, and reaction product 2 was slowly added at 25°C under nitrogen protection, and then the temperature was raised to 105°C, refluxed and stirred for reaction for 48 hours, and vacuum dried at 50°C to obtain reaction product 3; the amount ratio of N-hydroxymethyl acrylamide, anhydrous ethanol and reaction product 2 was 0.27 mol: 200 mL: 0.1 mol; Step A4: Add terephthalic acid, ethylene glycol, and reaction product 3 to a reactor, then add antimony trioxide and trimethyl phosphite, evacuate and replace with nitrogen twice, start stirring in a nitrogen atmosphere, control the temperature in the reactor to 230° C. and the pressure in the reactor to 300 kPa, stir and react for 5.5 hours, and adjust the pressure in the reactor to normal pressure; then slowly heat up to 270° C., evacuate for 50 minutes, control the temperature in the reactor to 270° C. and the vacuum degree in the reactor to 50 MPa, continue the polycondensation reaction for 2.5 hours to obtain modified PET; the amount ratio of terephthalic acid, ethylene glycol, reaction product 3, antimony trioxide and trimethyl phosphite is 1 mol: 1.14: 0.06: 0.005 mol: 0.0015 mol. Example 2

[0012] A modified PET, the preparation of which comprises the following steps: Step A1: 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then p-cyanobenzoyl chloride is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is completed, the temperature is raised to 40°C, and the reaction is carried out at a constant temperature for 9 hours. The reaction product 1 is obtained by distillation under reduced pressure. The amount ratio of 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide is 0.1 mol: 0.012 mol: 105 mL; the amount ratio of p-cyanobenzoyl chloride and dimethyl sulfoxide is 0.1 mol: 35 mL. Step A2: adding the reaction product 1 to tetrahydrofuran, starting stirring, adding Raney nickel and Pd / C, introducing hydrogen, stirring and reacting for 48 hours at normal pressure to obtain the reaction product 2; the amount ratio of the reaction product 1, tetrahydrofuran, Raney nickel and Pd / C is 0.1 mol: 85 mL: 0.01 mol: 0.012 mol; Step A3: N-hydroxymethyl acrylamide and anhydrous ethanol were added to a flask, and reaction product 2 was slowly added at 25°C under nitrogen protection, and then the temperature was raised to 105°C, refluxed and stirred for reaction for 48 hours, and vacuum dried at 50°C to obtain reaction product 3; the amount ratio of N-hydroxymethyl acrylamide, anhydrous ethanol and reaction product 2 was 0.27 mol: 210 mL: 0.12 mol; Step A4: Add terephthalic acid, ethylene glycol, and reaction product 3 to a reactor, then add antimony trioxide and trimethyl phosphite, evacuate and replace with nitrogen twice, start stirring in a nitrogen atmosphere, control the temperature in the reactor to 240°C and the pressure in the reactor to 330Pa, stir and react for 6.0 hours, and adjust the pressure in the reactor to normal pressure; then slowly heat up to 270°C, evacuate for 50 minutes, control the temperature in the reactor to 270°C, the vacuum degree in the reactor to 50MPa, continue the polycondensation reaction for 2.7 hours to obtain modified PET; the amount ratio of terephthalic acid, ethylene glycol, reaction product 3, antimony trioxide and trimethyl phosphite is 1 mol:1.14:0.06:0.006 mol:0.0019 mol. Example 3

[0013] A modified PET, the preparation of which comprises the following steps: Step A1: 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then p-cyanobenzoyl chloride is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is completed, the temperature is raised to 40°C, and the reaction is carried out at a constant temperature for 10 hours. The reaction product 1 is obtained by distillation under reduced pressure. The amount ratio of 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide is 0.1 mol: 0.015 mol: 110 mL; the amount ratio of p-cyanobenzoyl chloride and dimethyl sulfoxide is 0.1 mol: 40 mL. Step A2: adding the reaction product 1 to tetrahydrofuran, starting stirring, adding Raney nickel and Pd / C, introducing hydrogen, stirring and reacting for 48 hours at normal pressure to obtain the reaction product 2; the amount ratio of the reaction product 1, tetrahydrofuran, Raney nickel and Pd / C is 0.1 mol: 90 mL: 0.01 mol: 0.015 mol; Step A3: N-hydroxymethyl acrylamide and anhydrous ethanol were added to a flask, and reaction product 2 was slowly added at 25°C under nitrogen protection, and then the temperature was raised to 105°C, refluxed and stirred for reaction for 48 hours, and vacuum dried at 50°C to obtain reaction product 3; the amount ratio of N-hydroxymethyl acrylamide, anhydrous ethanol and reaction product 2 was 0.27 mol: 220 mL: 0.14 mol; Step A4: Add terephthalic acid, ethylene glycol, and reaction product 3 to a reactor, then add antimony trioxide and trimethyl phosphite, evacuate and replace with nitrogen twice, start stirring in a nitrogen atmosphere, control the temperature in the reactor to 250°C and the pressure in the reactor to 360 kPa, stir and react for 6.5 hours, and adjust the pressure in the reactor to normal pressure; then slowly heat up to 270°C, evacuate for 50 minutes, control the temperature in the reactor to 275°C, the vacuum degree in the reactor to 60 MPa, continue the polycondensation reaction for 3 hours to obtain modified PET; the amount ratio of terephthalic acid, ethylene glycol, reaction product 3, antimony trioxide and trimethyl phosphite is 1 mol: 1.14: 0.06: 0.0.008 mol: 0.0024 mol. Example 4

[0014] A flame retardant, the preparation of which comprises the following steps: Step B1: 1-allylhydantoin, glacial acetic acid and phosphoric acid are added to a flask, stirring is started, hydrogen peroxide is added within 30 minutes, stirring and reacting at 50° C. for 4 hours, washing with deionized water until neutral, and distilling under reduced pressure to obtain reaction product a; the amount ratio of 1-allylhydantoin, glacial acetic acid, phosphoric acid and hydrogen peroxide is 1g:0.15g:0.01g:0.8g; Step B2: Add the reaction product a and DOPO to a flask, start stirring and heat to 80°C, add triphenylphosphine after 20 minutes, continue to heat to 140°C, stir and react at constant temperature for 3 hours, cool to room temperature, add ethyl acetate to the flask, let stand for 48 hours, filter to obtain the reaction product b; the amount ratio of the reaction product a, DOPO, triphenylphosphine and ethyl acetate is 0.1 mol: 0.1 mol: 0.005 mol: 80 mL; Step B3: Add the terminal epoxy silicone oil and the reaction product b to methanol, start reflux stirring, then add trimethylamine, reflux stirring and react at 100°C for 3 hours to obtain a flame retardant; the amount ratio of the terminal epoxy silicone oil, the reaction product b, methanol and trimethylamine is 0.1 mol: 0.2 mol: 150 mL: 0.01 mol. Example 5

[0015] A flame retardant, the preparation of which comprises the following steps: Step B1: 1-allylhydantoin, glacial acetic acid and phosphoric acid are added to a flask, stirring is started, hydrogen peroxide is added within 35 minutes, stirring and reacting at 50° C. for 4.5 hours, washing with deionized water until neutral, and distilling under reduced pressure to obtain reaction product a; the amount ratio of 1-allylhydantoin, glacial acetic acid, phosphoric acid and hydrogen peroxide is 1g:0.15g:0.01g:0.8g; Step B2: Add the reaction product a and DOPO to a flask, start stirring and heat to 85°C, add triphenylphosphine after 25 minutes, continue to heat to 145°C, stir and react at constant temperature for 3.5 hours, cool to room temperature, add ethyl acetate to the flask, let stand for 48 hours, filter to obtain the reaction product b; the amount ratio of the reaction product a, DOPO, triphenylphosphine and ethyl acetate is 0.1 mol: 0.12 mol: 0.006 mol: 85 mL; Step B3: Add the terminal epoxy silicone oil and the reaction product b to methanol, start reflux stirring, then add trimethylamine, reflux stirring and react at 110°C for 3.5 hours to obtain a flame retardant; the amount ratio of the terminal epoxy silicone oil, the reaction product b, methanol and trimethylamine is 0.1 mol: 0.2 mol: 160 mL: 0.012 mol. Example 6

[0016] A flame retardant, the preparation of which comprises the following steps: Step B1: 1-allylhydantoin, glacial acetic acid and phosphoric acid are added to a flask, stirring is started, hydrogen peroxide is added within 40 minutes, stirring and reacting at 50° C. for 5 hours, washing with deionized water until neutral, and distilling under reduced pressure to obtain reaction product a; the amount ratio of 1-allylhydantoin, glacial acetic acid, phosphoric acid and hydrogen peroxide is 1g:0.15g:0.01g:0.8g; Step B2: Add the reaction product a and DOPO to a flask, start stirring and heat to 90°C, add triphenylphosphine after 30 minutes, continue to heat to 150°C, stir and react for 4 hours at a constant temperature, cool to room temperature, add ethyl acetate to the flask, let stand for 48 hours, filter, and obtain the reaction product b; the amount ratio of the reaction product a, DOPO, triphenylphosphine and ethyl acetate is 0.1 mol: 0.15 mol: 0.008 mol: 90 mL; Step B3: Add the end epoxy silicone oil and the reaction product b to methanol, start reflux stirring, then add trimethylamine, reflux stirring and react at 120°C for 4 hours to obtain a flame retardant; the amount ratio of the end epoxy silicone oil, the reaction product b, methanol and trimethylamine is 0.1 mol: 0.2 mol: 170 mL: 0.015 mol. Example 7

[0017] A moisture-absorbing and sweat-permeable chenille yarn, comprising a core yarn and a feather yarn; the feather yarn is viscose fiber; the core yarn comprises modified PET and a flame retardant as raw materials; The production process of the moisture-absorbing and sweat-permeable chenille yarn comprises the following steps: Step S1: the modified PET obtained in Example 1 is placed in a vacuum dryer at 120° C. for 12 hours to obtain a dried modified PET; the dried modified PET and the flame retardant obtained in Example 4 are melt-blended in a twin-screw blending extruder at a speed of 15 r / min and a temperature of 255° C. for 30 minutes to obtain a flame retardant masterbatch; the amount ratio of the modified PET to the flame retardant is 80 g:20 g; Step S2: Take the modified PET obtained in Example 1 and the flame retardant masterbatch, dry them in a vacuum oven at 100°C for 3 hours, and then transfer them to a vacuum drum oven and dry them at 120°C for 24 hours to obtain modified PET with low moisture content and flame retardant masterbatch; feed the modified PET with low moisture content through the feed hopper, and after melting, pass through the screw, die, metering pump and spinning assembly in sequence, and then prepare the core wire through side blowing, oiling, drawing and winding. The melting temperature is 240°C, the spinning temperature is 275°C, and the winding speed is 1200m / min; the dosage ratio of modified PET and flame retardant masterbatch is 20g:65g:15g; Step S3: clamp the feather yarn between the two core threads, and twist and weave to obtain the moisture-absorbing and sweat-permeable chenille yarn. Example 8

[0018] A moisture-absorbing and sweat-permeable chenille yarn, comprising a core yarn and a feather yarn; the feather yarn is viscose fiber; the core yarn comprises modified PET and a flame retardant as raw materials; The production process of the moisture-absorbing and sweat-permeable chenille yarn comprises the following steps: Step S1: the modified PET obtained in Example 2 is placed in a vacuum dryer at 120° C. for 13 h to obtain a dried modified PET; the dried modified PET and the flame retardant obtained in Example 5 are melt-blended in a twin-screw blending extruder at a speed of 15 r / min and a temperature of 260° C. for 35 min to obtain a flame retardant masterbatch; the amount ratio of the modified PET to the flame retardant is 80 g:20 g; Step S2: Take the modified PET obtained in Example 2 and the flame retardant masterbatch, dry them in a vacuum oven at 100°C for 3 hours, and then transfer them to a vacuum drum oven and dry them at 120°C for 24 hours to obtain modified PET with low moisture content and flame retardant masterbatch; feed the modified PET with low moisture content through the feed hopper, and after melting, pass through the screw, die, metering pump and spinning assembly in sequence, and then prepare the core wire through side blowing, oiling, drawing and winding. The melting temperature is 250°C, the spinning temperature is 285°C, and the winding speed is 1200m / min; the dosage ratio of modified PET and flame retardant masterbatch is 20g:70g:10g; Step S3: clamp the feather yarn between the two core threads, and twist and weave to obtain the moisture-absorbing and sweat-permeable chenille yarn. Example 9

[0019] A moisture-absorbing and sweat-permeable chenille yarn, comprising a core yarn and a feather yarn; the feather yarn is viscose fiber; the core yarn comprises modified PET and a flame retardant as raw materials; The production process of the moisture-absorbing and sweat-permeable chenille yarn comprises the following steps: Step S1: The modified PET obtained in Example 3 is placed in a vacuum dryer at 120° C. for 14 h to obtain a dried modified PET; the dried modified PET and the flame retardant obtained in Example 6 are melt-blended in a twin-screw blending extruder at a speed of 15 r / min and a temperature of 265° C. for 40 min to obtain a flame retardant masterbatch; the amount ratio of the modified PET to the flame retardant is 80 g:20 g; Step S2: Take the modified PET obtained in Example 3 and the flame retardant masterbatch, dry them in a vacuum oven at 100°C for 3 hours, and then transfer them to a vacuum drum oven and dry them at 120°C for 24 hours to obtain modified PET with low moisture content and flame retardant masterbatch; feed the modified PET with low moisture content through the feed hopper, and after melting, pass through the screw, die, metering pump and spinning assembly in sequence, and then prepare the core wire through side blowing, oiling, drawing and winding. The melting temperature is 260°C, the spinning temperature is 295°C, and the winding speed is 1200m / min; the dosage ratio of modified PET and flame retardant masterbatch is 20g:75g:5g; Step S3: clamp the feather yarn between the two core threads, and twist and weave to obtain the moisture-absorbing and sweat-permeable chenille yarn.

[0020] Comparative Example 1 This comparative example is a commercially available chenille yarn, and the raw material of the core yarn used in the yarn is only ordinary PET.

[0021] Comparative Example 2 Compared with Example 9, the modified PET is replaced with ordinary PET, and the rest is exactly the same as Example 9 to obtain a moisture-absorbent and sweat-permeable chenille yarn.

[0022] Comparative Example 3 Compared with Example 9, the flame retardant was replaced with DOPO, and the rest was exactly the same as Example 9 to obtain a moisture-absorbent and sweat-permeable chenille yarn.

[0023] The moisture-absorbing and sweat-permeable chenille yarn disclosed in the present invention is further tested for its effect, and the test results are as follows.

[0024] Referring to GB / T6503-2017 "Test method for moisture regain of chemical fibers", the moisture regain of the core yarns used for preparing the chenille yarns of Examples 7-9 and Comparative Examples 1-3 was measured; referring to FZ / T 50017-2011 "Test method for flame retardancy of polyester fibers - oxygen index method" for the limiting oxygen index measurement; referring to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method" for the antibacterial rate measurement, the results are recorded in Table 1; Table 1: Example 7 Example 8 Example 9 Comparative Example 1 Comparative Example 2 Comparative Example 3 Moisture regain / % 1.02 1.12 1.20 0.45 0.46 1.18 Limiting oxygen index / % 34.8 35.6 35.7 21.2 35.6 28.5 Escherichia coli antibacterial rate / % 95.2 96.0 95.8 62.2 95.8 63.4 Antibacterial rate of Staphylococcus aureus / % 94.0 94.9 94.7 60.8 94.6 61.2 Candida albicans antibacterial rate / % 91.2 92.0 91.7 56.2 91.6 57.4 According to the data in Table 1, compared with Example 1, it can be seen that the core wire made of modified PET and synthetic flame retardant used in the moisture-absorbing and sweat-permeable chenille yarn prepared by the present invention has excellent hygroscopicity, flame retardancy and antibacterial properties, compared with the core wire made of ordinary PET fiber, so that the hygroscopicity, flame retardancy and antibacterial properties of the chenille yarn are enhanced; compared with Comparative Example 2, Example 9 can be seen that the use of modified PET can enhance the moisture regain of the core wire and enhance the water absorption rate of the chenille yarn compared with ordinary PET; compared with Comparative Example 3, Example 9 can be seen that the use of synthetic flame retardant can enhance the flame retardancy and antibacterial properties of the core wire, so that the flame retardancy and antibacterial properties of the chenille yarn are enhanced.

[0025] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A moisture-absorbing and sweat-permeable chenille yarn, characterized in that: It includes two parts: a core thread and a feather yarn; the feather yarn is viscose fiber; the core thread includes raw materials such as modified PET and flame retardant; The modified PET is prepared by the following steps: Step A1: 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then p-cyanobenzoyl chloride is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is completed, the temperature is raised to 40°C, the reaction is carried out at a constant temperature for 8-10 hours, and the reaction is distilled under reduced pressure to obtain a reaction product 1; Step A2: Add the reaction product 1 to tetrahydrofuran, start stirring, add Raney nickel and Pd / C, introduce hydrogen, and stir the mixture under normal pressure for 48 hours to obtain the reaction product 2; Step A3: Add N-hydroxymethyl acrylamide and anhydrous ethanol into a flask, slowly add the reaction product 2 at 25°C under nitrogen protection, then heat to 105°C, reflux and stir to react for 48 hours, and vacuum dry at 50°C to obtain the reaction product 3; Step A4: Add terephthalic acid, ethylene glycol, and reaction product 3 to a reactor, then add antimony trioxide and trimethyl phosphite, evacuate and replace with nitrogen twice, start stirring in a nitrogen atmosphere, control the temperature in the reactor to 230-250°C, and the pressure in the reactor to 300-360 kPa, stir and react for 5.5-6.5 hours, and adjust the pressure in the reactor to normal pressure; then slowly heat up to 270°C, evacuate for 50 minutes, control the temperature in the reactor to 270-275°C, and the vacuum degree in the reactor to 50-60 MPa, and continue the polycondensation reaction for 2.5-3 hours to obtain modified PET.

2. The moisture-absorbing and sweat-permeable chenille yarn according to claim 1, characterized in that: The flame retardant is prepared by the following steps: Step B1: Add 1-allylhydantoin, glacial acetic acid and phosphoric acid into a flask, start stirring, add hydrogen peroxide within 30-40 minutes, stir and react at 50°C for 4-5 hours, wash with deionized water until neutral, and distill under reduced pressure to obtain reaction product a; Step B2: Add the reaction product a and DOPO to a flask, start stirring and heat to 80-90°C, add triphenylphosphine after 20-30 minutes, continue to heat to 140-150°C, stir and react at constant temperature for 3-4 hours, cool to room temperature, add ethyl acetate to the flask, let stand for 48 hours, filter, and obtain the reaction product b; Step B3: Add the epoxy-terminated silicone oil and the reaction product b into methanol, start reflux stirring, then add trimethylamine, reflux stirring and react at 100-120° C. for 3-4 hours to obtain a flame retardant.

3. The moisture-absorbing and sweat-permeable chenille yarn according to claim 1, characterized in that: In step A1, the usage ratio of 3-aminomethyl-tetrahydrofuran, potassium carbonate and dimethyl sulfoxide is 0.1 mol: 0.01-0.015 mol: 100-110 mL; the usage ratio of p-cyanobenzoyl chloride and dimethyl sulfoxide is 0.1 mol: 30-40 mL.

4. The moisture-absorbing and sweat-permeable chenille yarn according to claim 1, characterized in that: In step A2, the usage ratio of reaction product 1, tetrahydrofuran, Raney nickel and Pd / C is 0.1 mol: 80-90 mL: 0.01 mol: 0.01-0.015 mol.

5. The moisture-absorbing and sweat-permeable chenille yarn according to claim 1, characterized in that: In step A3, the usage ratio of N-hydroxymethyl acrylamide, anhydrous ethanol and reaction product 2 is 0.27 mol: 200-220 mL: 0.1-0.14 mol.

6. The moisture-absorbing and sweat-permeable chenille yarn according to claim 1, characterized in that: In step A4, the usage ratio of terephthalic acid, ethylene glycol, reaction product 3, antimony trioxide and trimethyl phosphite is 1 mol:1.14:0.06:0.005-0.0.008 mol:0.0015-0.0024 mol.

7. The moisture-absorbing and sweat-permeable chenille yarn according to claim 2, characterized in that: In step B1, the usage ratio of 1-allylhydantoin, glacial acetic acid, phosphoric acid and hydrogen peroxide is 1 g: 0.15 g: 0.01 g: 0.8 g.

8. The moisture-absorbing and sweat-permeable chenille yarn according to claim 2, characterized in that: In step B2, the usage ratio of reaction product a, DOPO, triphenylphosphine and ethyl acetate is 0.1 mol: 0.1-0.15 mol: 0.005-0.008 mol: 80-90 mL.

9. The moisture-absorbing and sweat-permeable chenille yarn according to claim 2, characterized in that: In step B3, the usage ratio of the epoxy-terminated silicone oil, the reaction product b, methanol and trimethylamine is 0.1 mol: 0.2 mol: 150-170 mL: 0.01-0.015 mol.

10. The production process of the moisture-absorbing and sweat-permeable chenille yarn according to claim 1, characterized in that: The steps include: Step S1: placing the modified PET at 120° C. and vacuum drying for 12-14 hours to obtain a dried modified PET; melt-blending the dried modified PET and the flame retardant in a twin-screw blending extruder at a speed of 15 r / min and a temperature of 255-265° C. for 30-40 minutes to obtain a flame retardant masterbatch; the amount ratio of the modified PET to the flame retardant is 80 g:20 g; Step S2: Take the modified PET and the flame retardant masterbatch and dry them in a vacuum oven at 100°C for 3 hours, then transfer them to a vacuum drum oven and dry them at 120°C for 24 hours to obtain modified PET and flame retardant masterbatch with low moisture content; feed the modified PET with low moisture content through a feed hopper, and after melting, pass through the screw, die, metering pump and spinning assembly in sequence, and then prepare the core wire through side blowing, oiling, drawing and winding. The melting temperature is 240-260°C, the spinning temperature is 275-295°C, and the winding speed is 1200m / min; the dosage ratio of modified PET and flame retardant masterbatch is 20g:65-75g:5-15g; Step S3: clamp the feather yarn between the two core threads, and twist and weave to obtain the moisture-absorbing and sweat-permeable chenille yarn.