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Production method of high-strength fine-denier lustrous polyester fiber staple fibers

A production method, technology of bright polyester, applied in the field of production of high-strength fine denier bright polyester staple fiber, to achieve the effects of increased post-drawing ratio, high magnification, and increased strength

Active Publication Date: 2015-04-15
SINOPEC YIZHENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After retrieving relevant domestic and foreign literature, there is no report that the strength can reach more than 6.40cN / dtex, and the fineness is 0.7-0.9dtex.

Method used

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  • Production method of high-strength fine-denier lustrous polyester fiber staple fibers
  • Production method of high-strength fine-denier lustrous polyester fiber staple fibers
  • Production method of high-strength fine-denier lustrous polyester fiber staple fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Directly spun from the melt, the nucleating agent nano barium sulfate is added in the form of ethylene glycol suspension before or after the esterification reaction of terephthalic acid and ethylene glycol polyester. The fiber production process is like figure 1 Shown.

[0020] This embodiment uses a melt direct spinning production line, and the concentration of nano-barium sulfate in polyethylene terephthalate is 1200 ppm. Table 1 shows the main process parameters for producing high-strength fine-denier polyester staple fibers by melt direct spinning.

[0021] Table 1: Main process parameters for producing high-strength fine-denier polyester staple fiber

[0022]

[0023] Table 2 shows the main physical performance indexes of the products obtained by applying this embodiment in the melt direct spinning production line.

[0024] Table 2: Main physical properties of high-strength fine-denier polyester staple fiber

[0025] Serial number

Embodiment 2

[0027] The concentration of nano-barium sulfate in polyethylene terephthalate in Example 1 is changed to 3000 ppm, and other main process parameters remain unchanged. The obtained high-strength fine-denier polyester staple fiber has a linear density of 0.87 dtex and a breaking strength of 6.46 cn / dtex.

Embodiment 3

[0029] The concentration of nano-barium sulfate in polyethylene terephthalate in Example 1 is changed to 1500 ppm, and other main process parameters remain unchanged. The obtained high-strength fine-denier polyester staple fiber has a linear density of 0.89 dtex and a breaking strength of 6.41 cN / dtex.

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Abstract

The invention discloses a production method of high-strength fine-denier lustrous polyester fiber staple fibers. The method is that the esterification reaction is performed for terephthalic acid and ethylene glycol polyester to obtain a terephthalate melt; after being processed by pre-polycondensation, final polycondensation and spinning intersection, the terephthalate melt is fed into a melt pipeline of a spinning device under a certain pressure; the melt passes through a booster pump and a filter to enter a spinning box body and then is extruded from a fine hole in a spinning plate, and the extruded melt is cooled through circular blowing air of a circular blowing barrel and then is gradually slimed and solidified and formed under the coiling and stretching tension force effect; strands from a spinning machine passes through a coiling machine and then is fed into a storing barrel for back draft. The method is specifically characterized in that 1200 to 3000ppm nucleating agents, namely, nano barium sulfate are added to the melt; the viscosity of the spinning melt is 0.7 to 1.0dl / g; a 10 to 30mm slow cooling circular blowing device is additionally arranged between the spinning plate and a circular blowing barrel; the back draft rate is 3.5 to 3.8 times. The polyester fiber staple fibers special for sewing threads has the fineness of 0.7 to 0.9dtex, and the breaking strength is more than 6.40cn / dtex.

Description

Technical field [0001] The invention relates to the technical field of polyester staple fiber production and processing, in particular to a method for producing high-strength fine-denier bright polyester staple fiber. Background technique [0002] In recent years, the domestic bright polyester staple fiber has been developed due to its rapid growth in demand. The total demand has increased from 200,000 tons in 2004 to 500,000 tons in 2010, of which 70% is used to process garment sewing threads , 30% is used to process luggage sewing thread, embroidery thread, woven, knitted fabrics, etc. Some data show that China's polyester bright sewing thread industry has a comparative advantage in the world. At present, the specification of bright polyester staple fiber is 1.33dtex, and the fiber strength index is ≥6.20cN / dtex. The survey shows that the user's attention to the raw fiber and the performance involve a total of 9 items, of which the focus on fiber strength is the first. [0003] ...

Claims

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Application Information

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IPC IPC(8): D01D5/088D01F1/10D01F6/92
Inventor 孙华平陈培陈小红
Owner SINOPEC YIZHENG CHEM FIBER
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