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Production method of fine denier hollow staple 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, good spinning performance, and the effect of improving control accuracy

Active Publication Date: 2017-10-13
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 of fine denier hollow staple fiber
  • Production method of fine denier hollow staple fiber
  • Production method of fine denier hollow staple 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 cross-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 ...

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Abstract

The invention provides a production method of fine-denier hollow staple fibers, which adopts a melt direct spinning process to meet the market demand that lightweight hollow polyester staple fibers are used in the traditional textile field and produce relatively thin textiles. This production method adopts the melt direct spinning process, and the melt enters the spinning box and is then extruded through the spinneret holes on the spinneret to form a melt stream; the air outlet tube located in the middle of the melt stream is from inside to outside Blowing out the ring and blowing the air to cool and solidify the melt stream to form primary fibers; the primary fibers are oiled, bundled, drawn, two-stage stretched, heat-set, crimped, dried, and then cut off; each spinneret hole is evenly distributed on the same circumference The four microholes on the top, the spinning temperature when the melt passes through the spinneret hole is 288-290°C; the distance M between the upper end of the blowing column and the spinneret is 80-150mm, the total height N of the blowing column is 850mm, and the ring blowing speed It is 0.75-1.50m / s, and the surrounding air velocity increases linearly in the direction of the height of the blowing column. The air velocity near the spinneret end is low, and the air temperature is 20-23°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 Patents(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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