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CN-121976320-A - Photo-cured polymer material spinning fiber and preparation method thereof

CN121976320ACN 121976320 ACN121976320 ACN 121976320ACN-121976320-A

Abstract

The application discloses a photocuring polymer material spinning fiber and a preparation method thereof, which belong to the technical field of spinning, and take a photocuring material consisting of isocyanate-terminated polyurethane prepolymer, hydroxyl-containing acrylic ester, photoinitiator, reactive diluent and functional auxiliary agent as a raw material, the raw material is conveyed to a spinning nozzle through a heating spinning machine, and the sprayed fiber is subjected to instant photocuring by an ultraviolet lamp additionally arranged at the spinning nozzle to finish spinning molding.

Inventors

  • CAO ZIYI
  • MA WENHUA
  • TONG XIAOTING
  • LU PENG

Assignees

  • 江苏金太阳纺织科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260310

Claims (10)

  1. 1. The preparation method of the photo-cured polymer material spinning fiber is characterized by comprising the following steps of: step 1, raw material preparation: Weighing 40-60 parts of isocyanate-terminated polyurethane prepolymer, 20-35 parts of acrylic ester containing hydroxyl, 2-5 parts of photoinitiator, 10-20 parts of reactive diluent and 1-5 parts of functional auxiliary agent according to the weight portion, and uniformly stirring and mixing to obtain a photocuring spinning raw material; step 2, raw material conveying: adding the photocuring spinning raw material prepared in the step 1 into a charging barrel of a spinning machine, heating the charging barrel to keep the raw material in a flowing state, controlling the heating temperature to be 40-80 ℃, and conveying the raw material to a spinning nozzle through a screw; And 3, photo-curing and forming, namely arranging an ultraviolet lamp at a spinning nozzle, wherein the wavelength of the ultraviolet lamp is 300-400nm, the power is 80-200W, raw materials are ejected from the spinning nozzle to form filaments, the filaments undergo photo-curing reaction under the irradiation of ultraviolet light, the curing time is 0.5-5s, and the photo-curing polymer material spinning fiber is obtained after traction and winding.
  2. 2. The preparation method of the photocuring polymer material spinning fiber according to claim 1, wherein the isocyanate-terminated polyurethane prepolymer is prepared by reacting diisocyanate with polyol at 60-80 ℃ for 2-4h in the presence of a catalyst, wherein the diisocyanate is one or more of toluene diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate, the polyol is one or more of polyether polyol, polyester polyol and polycarbonate polyol with the number average molecular weight of 1000-3000, the catalyst is one or more of butyl tin dilaurate, dibutyl tin dilaurate and stannous octoate, the molar ratio of isocyanate groups to hydroxyl groups in the diisocyanate and the polyol is 1.2-2.0:1, the catalyst is 0.01-0.1% of the total mass of the diisocyanate and the polyol, and the content of isocyanate groups in the isocyanate-terminated polyurethane prepolymer is 3-8wt%.
  3. 3. The method for preparing the photocuring polymer material spinning fiber according to claim 1, wherein the acrylate containing hydroxyl is one or more of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate and pentaerythritol triacrylate, the functional auxiliary is one or more of a flame retardant, an antibacterial agent, a mildew inhibitor and an anti-mite agent, the flame retardant is a phosphorus flame retardant, the antibacterial agent is a quaternary ammonium salt antibacterial agent, the anti-mite agent is a pyrethroid type anti-mite agent, and the mildew inhibitor is an isothiazolinone mildew inhibitor.
  4. 4. The method for preparing a photocuring polymer material spun fiber according to claim 1, wherein the photoinitiator is one or more of benzoin ethers, benzophenones and acylphosphine oxide photoinitiators.
  5. 5. The method for preparing a photocured polymer material spun fiber according to claim 4, wherein the photoinitiator is one or more of 2, 2-dimethoxy-2-phenylacetophenone, benzophenone, and ethyl 2,4, 6-trimethylbenzoyl phosphonate.
  6. 6. The method for preparing a photo-cured polymer material spun fiber of claim 1, wherein the reactive diluent is a difunctional acrylate.
  7. 7. The method for preparing a spun fiber of a photocurable polymeric material of claim 6, wherein the reactive diluent is one or more of 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, and 1, 4-butanediol diacrylate.
  8. 8. The method for preparing the photocuring polymer material spun fibers according to claim 1, wherein the heating of the material barrel in the step 2 adopts a sectional heating mode, the temperature of the front section of the material barrel is 40-50 ℃, the temperature of the middle section of the material barrel is 50-65 ℃, and the temperature of the rear section of the material barrel is 65-80 ℃.
  9. 9. The method for preparing the photocuring polymer material spun fiber according to claim 1, wherein the spinning hole diameter of the spinning nozzle in the step 3 is 0.1-0.5mm, the spinning speed is 5-20m/min, and the traction speed is 10-30m/min.
  10. 10. A photocuring polymer material spun fiber prepared by the preparation method of any one of claims 1 to 9, wherein the fiber diameter is 1 to 50 μm, the breaking strength is 2 to 8cN/dtex, and the breaking elongation is 10 to 40%.

Description

Photo-cured polymer material spinning fiber and preparation method thereof Technical Field The invention belongs to the technical field of textile spinning, and particularly relates to a photo-cured polymer material spinning fiber and a preparation method thereof. Background Spinning technology is one of the core technologies of the textile industry, and currently the mainstream spinning technology comprises melt spinning and solution spinning. The melt spinning is to heat the spinning material to a molten state, and extrude and shape through a spinning nozzle, the process needs to heat the material to a higher temperature (usually more than 150 ℃), so that the energy consumption is extremely high, and the applicability to materials with poor heat resistance is limited, the solution spinning is to dissolve the spinning material in an organic solvent to form a spinning solution, and solidify and shape through solvent volatilization or a coagulating bath after spinning, the process needs to use a large amount of organic solvent, and the solvent is easy to volatilize into the air to cause environmental pollution, and meanwhile, the solvent recovery cost is high, and can remain in the fiber to influence the product quality. Along with the increasing environmental protection requirements and the deep penetration of the energy-saving and emission-reduction concepts, the defects of the existing spinning process are gradually highlighted, and the development of a novel spinning process with low energy consumption, environmental protection and no pollution is needed. The photocuring technology has the advantages of high curing speed, low energy consumption, no solvent emission and the like, is widely applied to the fields of paint, adhesives and the like, but combines the photocuring technology with a spinning technology, and has no mature technical scheme for developing the photocuring spinning technology and matched materials. Disclosure of Invention The application provides a photocuring polymer material spinning fiber and a preparation method thereof, and aims at solving the technical problems that the prior art has extremely high energy consumption of melt spinning, has limited applicability to materials with poor heat resistance, needs to use a large amount of organic solvents for solution spinning, is easy to volatilize into air to cause environmental pollution, has higher solvent recovery cost, and can be remained in the fiber to influence the product quality. The invention aims to provide a photocuring polymer material spinning fiber and a preparation method thereof, wherein the process has the advantages of low energy consumption, environmental protection, no pollution and excellent fiber mechanical property. The preparation method of the photo-cured polymer material spinning fiber comprises the following steps: step 1, raw material preparation: Weighing 40-60 parts of isocyanate-terminated polyurethane prepolymer, 20-35 parts of acrylic ester containing hydroxyl, 2-5 parts of photoinitiator, 10-20 parts of reactive diluent and 1-5 parts of functional auxiliary agent according to the weight portion, and uniformly stirring and mixing to obtain a photocuring spinning raw material; step 2, raw material conveying: adding the photocuring spinning raw material prepared in the step 1 into a charging barrel of a spinning machine, heating the charging barrel to keep the raw material in a flowing state, controlling the heating temperature to be 40-80 ℃, and conveying the raw material to a spinning nozzle through a screw; And 3, photo-curing and forming, namely arranging an ultraviolet lamp at a spinning nozzle, wherein the wavelength of the ultraviolet lamp is 300-400nm, the power is 80-200W, raw materials are ejected from the spinning nozzle to form filaments, the filaments undergo photo-curing reaction under the irradiation of ultraviolet light, the curing time is 0.5-5s, and the photo-curing polymer material spinning fiber is obtained after traction and winding. The isocyanate-terminated polyurethane prepolymer is prepared by reacting diisocyanate and polyol at 60-80 ℃ for 2-4 hours in the presence of a catalyst, wherein the diisocyanate is one or more of toluene diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate, the polyol is one or more of polyether polyol, polyester polyol and polycarbonate polyol with the number average molecular weight of 1000-3000, the catalyst is one or more of butyl tin dilaurate, dibutyl tin (dodecyl sulfide) and stannous octoate, the molar ratio of isocyanate groups to hydroxyl groups in the diisocyanate and the polyol is 1.2-2.0:1, the catalyst is 0.01-0.1% of the total mass of the diisocyanate and the polyol, and the content of isocyanate groups in the isocyanate-terminated polyurethane prepolymer is 3-8wt%. The isocyanate-terminated polyurethane prepolymer is selected as a base material, has good flexibility and film forming property, and can be matched with acryli