Continuously static spinning method of polyamide 6/66 copolymer filament yarn

An electrospinning and copolymer technology, which is applied in the directions of monocomponent polyamide rayon, filament generation, filament/thread forming, etc. Performance, effect of improving structure and performance

Inactive Publication Date: 2007-09-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods cannot achieve long-term (more than 10 hours) continuous spinning of yarn, and there is basically no online post-processing o

Method used

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  • Continuously static spinning method of polyamide 6/66 copolymer filament yarn

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Embodiment 1

[0016] Embodiment 1: A continuous electrospinning method of polyamide 6 / 66 copolymer filament yarn, the polyamide 6 / 66 copolymer particles are dissolved in formic acid with a concentration of 88%, and the obtained mass percentage is 10-25% Spinning solution; Dissolve Pingpinga O in deionized water to prepare a bath solution with a mass percentage of 0.4-1.2%.

[0017] Spin the above spinning liquid on the surface of the bath liquid under certain process conditions by using electrospinning method, gather the basically solidified and formed fibers from the bath liquid and wind them on the winding drum for 2 to 3 laps, and then Continuous spinning of polyamide 6 / 66 copolymer filament yarn was carried out.

[0018] Described spinning process condition:

[0019] At room temperature, the relative humidity is 50-70%

[0020] Voltage 8-20kv

[0021] The height from the spinneret to the bath liquid is 3~13cm

[0022] Winding distance 10~50cm

[0023] The winding speed is 0~7m / min ...

Embodiment 2

[0031]2 g of polyamide 6 / 66 copolymer particles were dissolved in 11.3 g of formic acid, and thoroughly stirred to prepare a spinning solution with a mass percentage of 15%. 4 g of Pingpingo O was dissolved in 996 g of deionized water to form a 0.4% by mass Pingpingo O solution. The average value of the as-spun yarn obtained under the conditions of a temperature of about 25°C, a relative humidity of about 65%, a voltage of 11kv, a setting temperature of 95°C, a winding speed of 2m / min, and a height from the spinneret to the liquid surface of 4.5cm The linear density is 1.05dtex, the average fiber diameter is 187nm, the breaking elongation of the yarn is 87%, the breaking strength is 0.74cN / dtex, and the continuous spinning time is 12.5h. Carry out 50% thermal (95 ℃) stretching setting to the yarn spun under the same condition, the elongation at break of yarn drops to 57%, and breaking strength improves to 1.12cN / dtex, and the as-spun yarn is relatively Compared with that, the...

Embodiment 3

[0032] Example 3: 2g of polyamide 6 / 66 copolymer particles were dissolved in 8g of formic acid, and stirred thoroughly to prepare a spinning solution with a mass percentage of 20%. 6 g of Pingpingo O was dissolved in 994 g of deionized water to form a 0.6% by mass Pingpingo O solution. The average value of the as-spun yarn obtained under the conditions of a temperature of about 25°C, a relative humidity of about 65%, a voltage of 13kv, a setting temperature of 95°C, a winding speed of 5m / min, and a height from the spinneret to the liquid surface of 5.5cm The linear density is 1.25dtex, the average fiber diameter is 292nm, the breaking elongation of the yarn is 108%, the breaking strength is 0.81cN / dtex, and the continuous spinning time is 13h. Carry out 70% thermal (95 ℃) stretching setting to the yarn spun under the same condition, the elongation at break of yarn drops to 53%, and breaking strength improves to 1.35cN / dtex, and the as-spun yarn is relatively Compared with tha...

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Abstract

The invention discloses a continuous electrospinning method for polyamide 6/66 copolymer filament yarns. The polymer particles dissolve in formic acid to obtain 10-25% of spinning fluid by mass percent. The bath liquid is prepared by peregal O, using electrospinning method. Under high voltage electrostatic field, fibres of millimicron or submicron size are formed by unstable scourge action and multiple splitting. The fibres are accumulated in the surfactant bath liquid and the residual solvent diffuses in the liquid. After accumulating, the fibres are winded into initial yarns, and then through heating and succeeding stretch, the polyamide 6/66 copolymer filament yarns are obtained. The said polyamide 6/66 copolymer filament yarns formed by fibres with diameter of hundreds nanometer are prepared in the invention, and there in no broken thread during continuous spinning for above 12 hours. At the same time, the invention solves the problem that it is difficult to effectivle improve the structure and performance of fibre through suceeding stretch and heat setting processing by the general electrospinning method.

Description

technical field [0001] The invention relates to a filament yarn spinning method, in particular to a method for continuously spinning a polyamide 6 / 66 copolymer to produce a filament yarn by using an electrostatic spinning method. Background technique [0002] Electrospinning is a simple and easy spinning technology. Fibers with diameters ranging from a few nanometers to a few microns can be prepared by using this spinning method. It has developed rapidly in the past few years. At present, the products obtained by electrospinning are basically non-woven fabrics in which the fibers are randomly arranged. The products have potential in filtration materials, tissue engineering matrix, wound dressing and drug delivery materials, bionic materials, fiber-reinforced composite materials, etc. application value. The advantage of the non-woven fabric sheet material directly obtained by electrospinning is that it can be directly applied, but the mechanical prop...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D11/00D01F6/60
Inventor 潘志娟刘红波王建民
Owner SUZHOU UNIV
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