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Method for fabricating superfine fiber by flash vaporization

A superfine fiber and flash technology, which is applied in the direction of flash spinning, spinning solution preparation, etc., can solve the problems of increasing cost and not easy to control the process flow, and achieve cost reduction, simplification of spinning process and equipment, and reduction of The effect of operational risk

Inactive Publication Date: 2009-10-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can affect the fiber quality due to incomplete electrostatic separation, so it is not easy to control the process and increase the cost

Method used

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  • Method for fabricating superfine fiber by flash vaporization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Use the method described in the invention to spin polyethylene ultrafine fibers.

[0015] First put 10g of polyethylene monomer and 10ml of 1-butyl-3-methyl-imidazolium chloride into the autoclave, stir evenly, and let it stand for pretreatment for 1 hour, then add 100ml of 1,2-dichloroethane, Heat and pressurize the autoclave, and stir for 20 minutes at a heating temperature of 200°C and a pressurization pressure of 15 MPa to fully dissolve the polyethylene; then open the autoclave discharge control valve to rapidly eject the spinning solution, and the solvent instantly Vaporization and high-stretching of polyethylene fibers, and self-separation, three-dimensional network polyethylene ultra-fine fiber filaments are obtained on the receiving device.

[0016] After inspection, the diameter of the polyethylene ultrafine fiber prepared in this embodiment is between 200 nm and 5 μm, with an average value of 1 μm, and the fiber strands have a cluster or three-dimensional net...

Embodiment 2

[0018] Use the method described in the present invention to spin polyester microfibers.

[0019] First put 6g of polyester monomer and 12ml of 1-butyl-3-methyl-imidazolium chloride into the autoclave, stir evenly, and pre-treat for 2 hours, then add 150ml of chloroform, heat and pressurize the autoclave, Stir for 30 minutes at a temperature of 350°C and a pressure of 20 MPa to fully dissolve the polyester; then open the discharge valve of the autoclave to spray out the spinning solution quickly, and the solvent is instantly vaporized and the polyester fiber is stretched at a high rate and separated by itself. Silk, three-dimensional network polyester microfiber filaments are obtained on the receiving device.

[0020] After inspection, the diameter of the polyester ultrafine fiber prepared in this embodiment is between 100 nm-10 μm, with an average value of 1 μm, and the fiber strands are in a cluster or three-dimensional network structure.

Embodiment 3

[0022] The polyvinylidene fluoride superfine fiber is spun by using the method described in the invention.

[0023] First put 12g of vinylidene fluoride monomer and 25ml of 1-butyl-3-methyl-imidazolium chloride into the autoclave, stir evenly, let it stand still for 1.5 hours, then add 140ml of cyclohexane; Stir for 25 minutes at a temperature of 220°C and a pressure of 16 MPa to fully dissolve the vinylidene fluoride; then open the discharge valve of the autoclave to spray out the spinning solution quickly, and the solvent is instantly vaporized and the polyvinylidene fluoride fiber is drawn at a high speed. Stretch and separate the filaments by itself, and obtain three-dimensional network polyvinylidene fluoride ultrafine fiber filaments on the receiving device.

[0024] After inspection, the diameter of the polyvinylidene fluoride ultrafine fibers prepared in this example is between 200 nm and 10 μm, with an average value of 1 μm, and the fiber strands are in a cluster or t...

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Abstract

The invention relates to a fabricating method for fabricating superfine fiber by flash vaporization, of which the process is: polymers and ionic liquid are put into an autoclave according to a proportion of 10g of polymer to 5-20ml of ionic liquid and then is evenly stirred; then the standing pretreatment lasts for 0.5-3 hours under normal temperature so as to swell the polymer to be viscous liquid; polymer is added into the solvent in a ratio of 10g / 50-200ml and is stirred for 20-30min at the temperature of 150-350 DEG C and the pressure of 5-25MPa; after fully dissolving, a feeding control valve of the autoclave is opened so as to lead the filature to eject from a spinning nozzle to form the superfine fiber; devillication is automatically carried out; three-dimension network superfine fiber is formed on a receiving device by solidification; the polymer is polyolefine, polyester or polyvinylidene fluoride; the ionic liquid is 1-butyl-3-methyl-iminazole chloride or 1-allyl-3-methyll-iminazole chloride; and the solvent is 1, 2-dichloroethane, trichloromethane or cyclohexane.

Description

technical field [0001] The invention relates to a chemical fiber manufacturing technology, in particular to a method for spinning superfine fibers by using a flash method. Background technique [0002] Superfine fiber refers to the fiber with extremely small single filament fineness. There is no standard definition for superfine fiber in various countries in the world, but it usually refers to fibers with a single filament fineness less than 0.3dtex. Microfiber is a high-quality, high-tech and high-value-added new textile raw material. The textiles made of it have light and thin texture, soft and comfortable feel, good drapability, large specific surface area, strong adsorption, and warmth retention. It is widely used in clothing, home furnishing, leather and decorative materials, etc. The development of new ultrafine fibers and their new technologies has become a hot spot in research at home and abroad. The preparation methods generally include: composite spinning strippin...

Claims

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Application Information

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IPC IPC(8): D01D5/11D01D1/02
Inventor 程博闻西鹏夏磊康卫民任元林刘亚
Owner TIANJIN POLYTECHNIC UNIV
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