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Preparation method of porous polyester filament

A polyester filament and polyester technology, applied in the field of spinning, can solve problems such as uneven cooling of spinnerets, and achieve the effects of good cooling effect, improved cooling efficiency and excellent fiber performance

Active Publication Date: 2016-12-21
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of uneven cooling of the existing spinneret under the blowing of the surrounding air, and realize large-scale production spinning, provide a new spinneret, and use it for porous polyester long Silk preparation

Method used

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  • Preparation method of porous polyester filament
  • Preparation method of porous polyester filament
  • Preparation method of porous polyester filament

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing porous polyester POY filaments. The porous polyester filaments are prepared by using a porous spinneret. The arrangement of the spinneret holes on the spinneret is an elliptical arrangement. The elliptical arrangement means that the centers of the spinneret holes are located concentrically. On the ellipse, concentric ellipses are a series of ellipses, the major axes of all ellipses are collinear, and the minor axes are collinear.

[0032] Such as figure 1 As shown, the ratio of the length of the major axis to the minor axis of the ellipse is 1.3, the distance between adjacent spinneret holes is equal to the diameter of the guide hole of the spinneret hole plus 1.5mm, the spinneret is a circular spinneret, and the circular spinneret The difference between the diameter of the plate and the length of the largest major axis of the series ellipse is 11mm, the diameter of the guide hole of the spinneret hole is 2.0mm, the number of spinneret holes in th...

Embodiment 2

[0036] A method for preparing porous polyester POY filaments. The porous polyester filaments are prepared by using a porous spinneret. The arrangement of the spinneret holes on the spinneret is an elliptical arrangement. The elliptical arrangement means that the centers of the spinneret holes are located concentrically. On the ellipse, concentric ellipses are a series of ellipses, the major axes of all ellipses are collinear, and the minor axes are collinear.

[0037] Such as image 3 As shown, the ratio of the length of the major axis of the ellipse to the length of the minor axis is 1.6, the distance between adjacent spinneret holes is equal to the diameter of the guide hole of the spinneret hole plus 1.5mm, the spinneret is a circular spinneret, and the circular spinneret The difference between the diameter of the plate and the length of the largest major axis of the series ellipse is 11mm, the diameter of the guide hole of the spinneret hole is 2.0mm, the number of spinner...

Embodiment 3

[0046] A method for preparing porous polyester POY filaments. The porous polyester filaments are prepared by using a porous spinneret. The arrangement of the spinneret holes on the spinneret is an elliptical arrangement. The elliptical arrangement means that the centers of the spinneret holes are located concentrically. On the ellipse, concentric ellipses are a series of ellipses, the major axes of all ellipses are collinear, and the minor axes are collinear.

[0047] The arrangement of the spinneret holes is symmetrical about the major axis, the ratio of the length of the major axis to the minor axis of the ellipse is 1.4, the distance between adjacent spinneret holes is equal to the diameter of the guide hole of the spinneret hole plus 1.6mm, and the spinneret is a circular nozzle. The diameter of the spinneret, the difference between the diameter of the circular spinneret and the length of the largest major axis of the series ellipse is 12mm, the diameter of the guide hole o...

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Abstract

The invention relates to a preparation method of a porous polyester filament. The porous polyester filament is prepared by spinning of a porous spinneret; an arrangement mode of spinneret orifices in the porous spinneret is elliptical arrangement; the elliptical arrangement means that centers of the spinneret orifices are positioned in concentric ellipses; the concentric ellipses are a series of ellipses; long axes of all the ellipses are collinear, and short axes of all the ellipses are collinear. When effective areas of the porous spinnerets are identical, the layer number of the elliptical arrangement of the spinneret orifices is smaller than that of a circular arrangement, and the orifice number of the elliptical arrangement of the spinneret orifices is greater than that of circular arrangement; by adopting the elliptical arrangement, cooling to a greater degree can be realized, and the cooling efficiency is remarkably improved. The porous polyester filament prepared by the preparation method disclosed by the invention is excellent in mechanical property; a breaking strength CV value of POY (Polyester Pre-Oriented Yarn) is smaller than or equal to 2.5 percent, and a breaking elongation CV value of the POY is smaller than or equal to 5.0 percent; a breaking strength CV value of FDY (Fully Drawn Yarn) is smaller than or equal to 4.0 percent, a breaking elongation CV value of the FDY is smaller than or equal to 8.0 percent, and yarn unevenness CV value of the FDY is smaller than or equal to 2.0 percent.

Description

technical field [0001] The invention belongs to the field of spinning and relates to a preparation method of porous polyester filaments. Background technique [0002] Polyethylene terephthalate (PET) has the characteristics of high mechanical properties, wear resistance, creep resistance and electrical insulation properties, and is rich in raw materials. It is the fastest growing synthetic fiber variety with the largest production capacity in recent years. PET microfiber is a high-tech and high-value-added product with excellent performance and unique style. It has broad application prospects in the fields of medium and high-end fabrics, construction, biomedicine, industrial filtration, military protection, and environmental protection. There are many ways to prepare PET ultrafine fibers, among which the melt spinning method is currently the most widely used in industrial production. [0003] There are many parameters in the melt spinning process. These parameters determine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/253D01D4/02
Inventor 范红卫汤方明尹立新刘志立陈德伟王丽丽
Owner JIANGSU HENGLI CHEM FIBER