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Production process for fine denier cross-shaped profiled polyester filament yarn

A special-shaped polyester filament and production process technology, applied to the melting of filament raw materials, filament/thread forming, single-component polyester artificial filament, etc., can solve problems such as production difficulties, reduce production difficulty, improve Improvement of spinnability and uniformity

Inactive Publication Date: 2015-01-14
JIANG SU TIANDI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many manufacturers at home and abroad. The production route adopts FDY one-step method, POY and DTY two-step method. The overall production process tends to be mature, but in practice it is found that the production of this variety is difficult, which requires us to continue to explore. And innovation, continuously improve the production process, improve product spinnability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Adopt one-step method to produce fine denier cross special-shaped polyester filament

[0023] Adopt FDY one-step production route: pre-crystallize PET slices at 168°C for 18 minutes, dry at 170°C for 8-10 hours until the moisture content of slices is ≤20ppm, and melt and extrude through a screw extruder. The temperature of each zone of the screw is: 275°C in the first zone , Zone 2 280°C, Zone 3 286°C, Zone 4 288°C, Zone 5 290°C, Zone 6 292°C. A spinneret with a cross-shaped spinneret hole is used for spinning, and the spinning temperature is 292 ° C. The primary fiber obtained by spinning is cooled by side blowing. The wind temperature is 28 ° C and the wind speed is 0.4m / s. Before side blowing cooling Add a slow cooler, then oil the nozzle, stretch and set it, add a network and wind it up, and the winding speed is 4300m / min.

[0024] The oiling rate of the oil nipple is 2.8%. A preservative is added to the oil agent used for oiling the oil nozzle, and ...

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Abstract

The invention discloses a production process for fine denier cross-shaped profiled polyester filament yarn. An FDY one-step method production line is adopted, PET slices are pre-crystallized and dried until the water content of the slices is lower than or equal to 20 ppm, the slices are extruded through a screw extruder in a fusion mode, a spinneret plate with cross-shaped spinneret orifices is adopted for spinning, the spinning temperature is 290-295 DEG C, cross air blasting cooling is carried out on nascent fibers obtained through spinning, air temperature is 26-30 DEG C, air speed is 0.3-0.5 m / s, a slow cooler is added before cross air blasting cooling, and then oil nozzle oiling, stretching setting, meshing and winding are conducted. According to the method, the occurrence frequency of broken ends and broken filaments is reduced, and spinnability is improved while the profile degree is guaranteed; uniformity of thick and thin knobs, production efficiency and product quality are improved, product cost is reduced, labor is saved, and the production difficulty is lowered; preservatives are added into oiling agents, so that the bundling property and the antistatic property of the yarn are improved.

Description

Technical field: [0001] The invention specifically relates to a production process of fine-denier cross shaped polyester filaments. technical background: [0002] At present, my country's total chemical fiber production has leapt to the first place in the world, but most of them are ordinary conventional fibers. There are few types of differentiated and functional fibers, and the differentiation rate is far lower than that of developed countries. Many of them have high technical content. , Products with high added value are monopolized by foreign countries. The structural contradictions of low-grade products and a single variety force domestic chemical fiber enterprises to face up to the reality, practice their internal skills hard, and strive to catch up with foreign advanced levels. Therefore, it has become their general consensus and core task to devote themselves to product innovation, develop and produce various new chemical fiber varieties with high technology content,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/253D01D5/088D01D5/098D01D5/096
CPCD01D5/08D01D1/04D01D5/088D01D5/096D01D5/253D01F6/62
Inventor 周鑫刘才洪蒋云峰
Owner JIANG SU TIANDI CHEM FIBER
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