Production method for fine denier hollow short fiber

A production method and technology of polyester staple fibers are applied in the field of melt direct spinning of fine denier hollow polyester staple fibers, which can solve the problems of yarn uniformity and physical and mechanical properties that cannot meet thin fabrics, and achieve physical and mechanical properties and appearance. Effective control of performance, simple production process, and easy control of manufacturing and processing

Active Publication Date: 2016-01-06
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these discrepancies are greater than the lower limit of cotton spinning processability, the uniformity and physical and mechanical properties of the produced yarn cannot meet the requirements of thin fabrics

Method used

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  • Production method for fine denier hollow short fiber
  • Production method for fine denier hollow short fiber
  • Production method for fine denier hollow short fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: direct spinning, target linear density 1.11dtex×38mm high-strength low-elongation cotton-type semi-dull hollow polyester staple fiber

[0037] The direct spinning process is adopted, the intrinsic viscosity of the melt is 0.670±0.015dl / g, the content of titanium dioxide as a matting agent is 0.18%wt (relative to the melt), the daily spinning output is 100 tons / day, and 32 spinning positions.

[0038] According to the parameters in Table 1, the target finished fiber outer diameter is 11.1 μm, and the target hollowness is 10.5-11.5%, which is equivalent to the diameter of a 1.33dtex fiber with a solid circular section. It is used for ring spinning and knitting yarn.

[0039] The melt temperature before entering the spinning box is 288°C, controlled by ±1°C, the diameter D of the outer arc of the spinneret microhole is 0.34mm, and the diameter d of the inner arc of the spinneret microhole is 0.18mm. The circular arc forms four symmetrical hollow fiber melt ejec...

Embodiment 2

[0042] Example 2 direct spinning, target linear density 1.33dtex × 38mm medium strength and medium elongation cotton type semi-dull hollow polyester staple fiber

[0043] The direct spinning process is adopted, the intrinsic viscosity of the melt is 0.670±0.015dl / g, the content of the matting agent titanium dioxide is 0.18%wt (relative to the melt), the daily spinning output is 100 tons / day, and 32 spinning positions.

[0044] According to the parameters in Table 1, the target finished fiber outer diameter is 12.0 μm, and the target hollowness is 13.5-15.0%, which is equivalent to the diameter of a 1.67dtex fiber with a solid circular section. It is used for ring spinning and knitting yarn.

[0045] The melt temperature before entering the spinning box is 288°C, controlled by ±1°C, the diameter D of the outer arc of the spinneret microhole is 0.34mm, and the diameter d of the inner arc of the spinneret microhole is 0.18mm. The circular arc forms four symmetrical hollow fiber ...

Embodiment 3

[0048] Example 3 direct spinning, target linear density 1.56dtex×51mm medium strength, medium elongation, medium length semi-dull hollow polyester staple fiber

[0049] The direct spinning process is adopted, the intrinsic viscosity of the melt is 0.630±0.015dl / g, the content of the matting agent titanium dioxide is 0.18%wt (relative to the melt), the daily spinning output is 100 tons / day, and 32 spinning positions.

[0050] According to the parameters in Table 1, the outer diameter of the target finished fiber is 15.0 μm, the hollowness is 16-18%, which is equivalent to the diameter of a 2.5dtex fiber with a solid circular section. It is used for ring spinning and knitting yarn.

[0051] The melt temperature before entering the spinning box is 288°C, controlled by ±1°C, the diameter D of the outer arc of the spinneret microhole is 0.34mm, and the diameter d of the inner arc of the spinneret microhole is 0.18mm. The circular arc forms four symmetrical hollow fiber melt ejecti...

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Abstract

The invention provides a production method for fine denier hollow short fibers. A melt direct spinning technology is used, so that lightweight hollow polyester short fibers can be used in the conventional field of spinning, and market requirement for producing relative thin textiles is satisfied. The production method uses the melt direct spinning technology. After a melt enters a spinning manifold, through extrusion by a spinneret orifice on a spinneret plate, a melt trickle is formed. A chimney fan on the middle part of the melt trickle blows out cross air blow from inside to outside, to cool and solidify the melt trickle, and a nascent fiber is formed. Through oil applying bundling, traction, two-stage stretching, heat setting, crimping, and drying, the nascent fiber is obtained after cutting. Each spinneret orifice comprises four micropores uniformly distributed on a same circumference. When the melt passes through the spinneret orifice, temperature of spinning is 288-290 DEG C. the distance M between the upper end of a blowing column and the spinneret plate is 80-150 mm. Total height N of the blowing column is 850 mm. Cross air blow speed is 0.75-1.50 m / s. The cross air blow speed increases linearly on the height direction of the blowing column, the air blow speed is low close to the spinneret plate end, and wind temperature is 20-23 DEG C.

Description

technical field [0001] The invention relates to the technical field of synthetic fibers, in particular to a method for manufacturing fine-denier hollow polyester staple fibers by melt direct spinning. Background technique [0002] Since the 1990s, the industrialization of polyester fibers, especially polyester staple fibers directly spun from the melt, has achieved large-scale industrialization. The global annual production capacity of imitation natural cotton and wool with solid circular fiber cross-sections has exceeded 20 million tons, which is similar to or even surpasses the production capacity of natural cotton. It has become an important part of human life resources. [0003] With the development of the global economy and the continuous advancement of technology, resources are further optimized, and the efficiency and sustainable development of the textile processing industry chain are improved. The defects of traditional staple fibers with a solid circle cross-secti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/24D01D5/092D01D10/02D01D10/06
Inventor 浦金龙陶国平
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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