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Production method for porous fine denier polyester filament

A polyester filament and production method technology, applied in filament/thread forming, spinneret assemblies, textiles and papermaking, etc., can solve the problems of uneven cooling of inner and outer filament bundles, difficulty in blowing cooling air, and total fineness Large and other problems, to achieve the effect of production flexibility, saving spinning cost and high production efficiency

Active Publication Date: 2015-02-25
ZHEJIANG HENGYI HIGH TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the porous fine denier polyester filaments in the prior art have a large total fineness, a large number of holes, and dense tows, during the spinning process, it is difficult for the cooling air to blow through, resulting in uneven cooling of the inner and outer layers of the tows, resulting in uneven The problem of large dry value and uneven dyeing after texturing, the purpose of the present invention is to provide a production method of porous fine-denier polyester filaments, the use of the present invention is conducive to the cooling of the tow and the cooling air can go deep into the inner layer to achieve The purpose of uniform cooling of inner and outer tow

Method used

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  • Production method for porous fine denier polyester filament

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] like figure 1 As shown, the diameter of the spinneret 1 is 120 mm, and the number of spinneret holes 2 in the spinneret 1 is 420. The spinneret holes are divided into three equal parts, and the distance 3 between each part is 8 mm. Melt direct spinning is adopted, sprayed out through the spinneret hole 2, and the outer ring is blown and cooled, clustered and oiled, wound, spun POY with a specification of 320dtex / 420f, and then processed by false twisting to obtain 180D / 420f porous fine Denier polyester filament, single filament fineness is 0.42dpf.

[0021] After testing, the breaking strength of the fiber is 3.60CN / dtex, and the breaking elongation is 21.6%.

Embodiment 2

[0023] like figure 1 As shown, the diameter of the spinneret 1 is 105 mm, and the number of spinneret holes 2 in the spinneret 1 is 420, and the spinneret holes are divided into three equal parts, and the distance 3 between each part is 4 mm. Melt direct spinning is adopted, sprayed out through the spinneret hole 2, and the outer ring is blown and cooled, clustered and oiled, wound, spun POY with a specification of 320dtex / 420f, and then processed by false twisting to obtain 180D / 420f porous fine Denier polyester filament, single filament fineness is 0.42dpf.

[0024] After testing, the breaking strength of the fiber is 3.51CN / dtex, and the breaking elongation is 20.5%.

Embodiment 3

[0026] like figure 1 As shown, the diameter of the spinneret 1 is 115 mm, and the number of spinneret holes 2 in the spinneret 1 is 252. The spinneret holes are divided into three equal parts, and the distance 3 between each part is 10 mm. It adopts melt spinning, sprays through the spinneret hole 2, and after the outer ring is blown and cooled, it is clustered and oiled, wound, and spun POY with a specification of 450dtex / 252f, and then processed by false twisting to obtain a porous fine denier of 250D / 250f Polyester filament, single filament fineness is 1.0dpf.

[0027] After testing, the breaking strength of the fiber is 3.46CN / dtex, and the breaking elongation is 22.3%.

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Abstract

The invention belongs to the field of manufacturing of chemical fibers. In order to solve the problems of the prior art of uneven cooling of inner and outer layers of strands, big evenness value and uneven dyeing after elasticizing, caused by difficulty in thoroughly blowing the cooling air during a spinning process because of long total fineness, high quantity of pores and thick strands of a porous fine denier polyester filament, the invention provides a production method for the porous fine denier polyester filament. The production method comprises the following steps: adopting melt straight spinning or melt spinning; spraying through a spinneret plate; after cooling in the cooling manner of external circular blowing, applying oil to strands and coiling; and spinning into a pre-oriented yarn; performing false twisting, thereby obtaining the porous fine denier polyester filament. The spinneret plate is evenly divided into three parts and the three parts are at equal intervals. By adopting the production method provided by the invention, the cooling of strands is boosted, cooling air can deeply enter into the inner layer, and the purpose of evenly cooling the inner and outer layers of strands is achieved.

Description

technical field [0001] The invention belongs to the field of chemical fiber production, and in particular relates to a production method of porous fine-denier polyester filaments. Background technique [0002] At present, porous fine-denier polyester filaments with large denier (above 250D) and many holes (above 250 holes) are produced in the market, and the production method of plying is mostly used, because it is difficult to solve the problem of uniform cooling in the spinning process. For example, in the production of 300D / 288f porous fine denier polyester low elastic yarn, the production route often used is: first produce 150D / 144f pre-oriented yarn, and then compound the two pre-oriented yarns during the texturing process to obtain the final product; there are also manufacturers Composite in the spinning process, that is, compound two 150D / 144f pre-oriented yarns before winding to obtain 300D / 288f pre-oriented yarns, and then add texturing. The common disadvantage of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/092D01D4/00
Inventor 王炳辉缪国华吴俊红
Owner ZHEJIANG HENGYI HIGH TECH MATERIAL