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Cooling and forming method of melt filature

A technology of cooling forming and melt spinning, which is applied in filament/thread forming, textile and papermaking, fiber processing, etc. It can solve the problems of increasing unevenness of the mechanical properties of single filament and single filament, and achieve single filament dryness. Uniformity, reduce production cost, reduce the effect of unevenness

Active Publication Date: 2011-01-05
WUXI JINTONG CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This contact heat absorption method is easily affected by the interference of the external air flow or the turbulence of the water flow, resulting in an increase in the unevenness of the mechanical properties of the monofilament, especially the fine denier monofilament.

Method used

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  • Cooling and forming method of melt filature
  • Cooling and forming method of melt filature
  • Cooling and forming method of melt filature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 The structure of the metal tube cooling device adopted in the present invention

[0028] Such as figure 1 , figure 2 As shown, the metal tube cooling device adopted in the present invention is a metal tube 1, and the metal tube includes two layers inside and outside, and the melt spinning 2 extruded by the spinneret fine flow passes through the cavity of the inner metal tube, cooling The liquid enters through the inlet 11 of the outer metal tube, flows out through the outlet 12 of the outer metal tube, and circulates in the cavity between the inner metal tube and the outer metal tube.

[0029] Such as image 3 As shown, a plurality of metal tubes can be arranged into a metal tube group for use, which has improved space utilization and production efficiency.

Embodiment 2

[0030] Embodiment 2 adopts the measured fiber diameter irregularity of the existing air blowing cooling forming method

[0031] Raw material: PET; Intrinsic viscosity: 0.65; Melting temperature: 278°C; Spinning box temperature: 280°C; Cooling blowing form: Side blowing; Wind speed: 0.35 m / s; Side blowing length: 2200mm.

[0032] Single filament fineness: 20dtex; fiber diameter irregularity: 3.6%.

Embodiment 3

[0033] Embodiment 3 adopts the fiber diameter irregularity measured by the cooling forming method provided by the present invention

[0034] Raw material: PET; Intrinsic viscosity: 0.65; Melting temperature: 278°C; Spinning box temperature: 280°C; Shape of metal tube wall: round tube; Cooling temperature of inner metal tube cavity: 20°C; Cooling liquid medium: silicone oil ; The distance between the metal tube wall tube and the spinneret plate surface: 15mm; the spinning length: 1800mm.

[0035] Single filament fineness: 20dtex; fiber diameter irregularity: 1.0%.

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Abstract

The invention relates to a cooling and forming method of high molecular polymer melt filature. The method comprises the following steps of: (1) melting a polymer; (2) passing through a spinning box body; (3) cooling the melt filature which is extruded by spinneret plate threads with a metal tube cooling device; and (4) coiling and forming, wherein a metal tube cooling device is a metal tube which comprises an inner layer and an outer layer, the melt filature extruded by the spinneret plate threads penetrates through a hollow cavity of a metal tube at the inner layer, and cooling liquid enters an inlet of a metal tube at the outer layer, flows out of an outlet of the metal tube at the outer layer and circularly flows in the hollow cavity between the metal tube at the inner layer and the metal tube at the outer layer. The invention has the advantages of greatly lowering an unevenness rate (Calorific Value) due to the evenness of filature strips, greatly reducing energy needed for cooling the melt filature and saving the production cost.

Description

technical field [0001] The invention relates to a cooling forming method for polymer melt spinning, which belongs to the field of chemical fibers. Background technique [0002] There are the following methods for the cooling and forming of the existing melt-spinning fine flow in the whole spinning process. One, circular blowing, is a four-sided blowing method that forms a circular shape at the deformation zone 0-500mm under the spinning assembly plate, and the wind speed is 0.1 ~5.6m / s, wind temperature 15~32℃, mainly used for melt spinning staple fiber spinning; second, side blowing, is a deformation zone of 0~2500mm under the spinning assembly plate to form a straight line and unilaterally blow to the tow The air blowing method is mainly used for melt-spun filament spinning; the third is that the center blows outward, which is a deformation zone of 0-550mm under the spinning assembly plate, and the cylindrical air duct in the middle of the spinneret blows air on all sides....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/088
Inventor 钱鲁兴
Owner WUXI JINTONG CHEM FIBER