Method for melting spinning and flexible blowing of fibers and product thereof

A melt spinning and fiber technology, applied in the field of fiber melt spinning flexible blowing method and its products, can solve the problems of complex research process, large investment, long industrial production cycle, etc., and achieve simple process, low operating cost, and simulation effect. obvious effect

Active Publication Date: 2011-11-16
WUXI JINTONG CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former research process is complicated, the industri

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In PET melt-spinning process, adopt flexible blowing method, wherein the wind speed of cooling blowing is controlled by pulse signal and changes according to the law, and described law is meant that described wind speed satisfies equation V (t)=1.1+sin60t, wherein V ( t) is the wind speed in m / s; t is the blowing pulse time in s (the same below). The cooling blowing temperature is 26°C, and the blowing area is 0-500mm. After the primary fiber is stretched, the fiber presents a three-dimensional curl. The winding speed is 1500m / min. When the total draft ratio is 3.5, the final number of fiber curls is 8. ~25 pieces / 25mm, among which the number of fiber curls within the range of 11~16 pieces / 25mm accounts for 40% of the total distribution of the number of curls, less than 11 pieces / 25mm accounts for 30%, and more than 16 pieces / 25mm accounts for 30% %, 11-19 pieces / 25mm accounted for 53%, and the fiber fineness was 3.1dtex. The crimp elastic recovery rate of the fiber is...

Embodiment 2

[0024] In the PET melt-spinning process, a flexible blowing method is adopted, wherein the wind speed of the cooling blowing air is controlled by a pulse signal to change according to a law, and the law means that the wind speed satisfies the equation V(t)=0.8+sin200t. The cooling blowing temperature is 16°C, and the blowing area is 0-600mm. After the primary fiber is stretched, the fiber presents a three-dimensional crimp. The winding speed is 1400m / min. When the total draft ratio is 3.5, the final fiber crimp number is 8. ~25 pieces / 25mm, in which the number of fiber crimps within the range of 11-16 pieces / 25mm accounts for 50% of the total distribution of the number of crimps, less than 11 pieces / 25mm accounts for 25%, and more than 16 pieces / 25mm accounts for 25% %, 11-19 pieces / 25mm accounted for 60%, and the fiber fineness was 3.1dtex. The crimp elastic recovery rate of the fiber is 85-92%.

Embodiment 3

[0026] In the PP melt spinning process, the flexible blowing method is adopted, wherein the wind speed of the cooling blowing is controlled by the pulse signal and changes according to the law. The law means that the wind speed satisfies the equation V(t)=1.1+0.95sin400t. The cooling blowing temperature is 21°C, and the blowing area is 0-800mm. After the primary fiber is stretched, the fiber presents a three-dimensional crimp. The winding speed is 2000m / min. When the total draft ratio is 4.5, the final fiber crimp number is 9. ~30 pieces / 25mm, among them, the number of fiber crimps within the range of 11-16 pieces / 25mm accounts for 60% of the total distribution of the number of crimps, less than 11 pieces / 25mm accounts for 5%, and more than 16 pieces / 25mm accounts for 35% %, 11-19 pieces / 25mm accounted for 75%, and the fiber limit was 2.8dtex. The crimp elastic recovery rate of the fiber is 85-98%.

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Abstract

The invention relates to a method for melting spinning and flexible blowing of fibers and a product thereof, in particular to a melting spinning method of random differential air cooling in spinning forming of clothing fibers and a product thereof. In the method provided by the invention, in the process of the melting spinning, the air speed of the air cooling is controlled by pulse signals to change according to a law that the air speed satisfies an equation V(t)=S+ sin omega t. The invention also provides a fiber, wherein the crimp elasticity recovery rate of the fiber is 85-98%; after being stretched, the fiber is three-dimensionally crimped; under the condition that the total drawing ratio is 1.4-5.5, the final fiber crimp number is 7-15/25mm; and the distribution number of the fiber crimp number in a range of 11-19/25mm is more than 50% of the total distribution ratio of the crimp number. In the invention, the method of air cooling differentiation is adopted at a key area of the melting spinning and cooling forming to ensure that the problem that the forming and the winding of polyamide precursor fibers can be normally carried out while the difference of internal crystal orientation of the fibers as well as the profile degree and the differentiation of the morphological structure of the polyamide fibers can be guaranteed is solved, therefore, the purpose of synthetic fiber simulation is achieved.

Description

technical field [0001] The invention relates to a flexible blowing method for fiber melt spinning and its products, in particular to a flexible blowing method for fiber melt spinning and its products, which take the random differentiation of cooling and blowing in fiber spinning forming. Background technique [0002] The natural imitation of synthetic fibers is an important means to improve its wearing comfort. Naturalization includes molecular design, physical and mechanical properties, and regulation of morphological structure. The former research process is complicated, the industrial production cycle is long, and the investment is large. Changing the physical mechanics and morphological structure of synthetic fibers, if designed according to the normal distribution of natural fibers, is an effective way to adjust the process less in production, the process is simple, and the cost is low. Application No. 200710120117.3 mentions a method for preparing differentiated fibe...

Claims

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Application Information

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IPC IPC(8): D01D5/092D01D5/253D01D5/24
Inventor 倪建华王依民朱卫彪邹黎明王燕萍甘海啸
Owner WUXI JINTONG CHEM FIBER
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