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Spinning method

A technology of tow and monofilament, applied in the field of spinning, can solve the problems of insufficient satisfaction and insufficiency of cooling methods, etc.

Inactive Publication Date: 2005-09-07
DIOLEN IND FIBERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Cooling methods in the prior art often do not meet or do not adequately meet these requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The invention is further illustrated by means of the following examples without being limited thereto.

[0037] Under the conditions listed in Table 1, use a relative viscosity of 2.04 (at 25°C with an Erbold viscometer (DIN51562) for 1 gram of polymer in 125 grams of 2,4,6-trichlorophenol and phenol mixture solution (TCF / F; 7:10 m / m)) of polyethylene terephthalate pellets were spun and cooled under the conditions listed in Table 1. The stretching speed was 6000 m / min. An additional slack of 0.5% was set and the winding speed was 5970 m / min.

[0038] Yarn denier (dtex)

1440

Monofilament fineness (dtex)

4.35

Spinneret

331 holes; each 800 μm in diameter

Length of heating tube(mm)

150

Temperature in the heating tube (°C)

200

The length of the first cooling zone (mm)

700

Blowing volume (m 3 / h)

400

The length of the second cooling zone (mm),

double side panel

700

...

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Abstract

A method is provided for spinning a multifilament thread from a thermoplastic material, including the steps of extruding the melted material through a spinneret with a plurality of spinneret holes into a filament bundle with a plurality of filaments, winding the filaments as thread after solidifying, and cooling the filament bundle beneath the spinneret, whereby in a first cooling zone the gaseous cooling medium is directed in such a way that it flows through the filament bundle transversely, the cooling medium leaving the filament bundle practically completely on the side opposite the inflow side, and in a second cooling zone beneath the first cooling zone, the filament bundle being cooled further essentially through self-suction of the gaseous cooling medium surrounding the filament bundle.

Description

technical field [0001] The invention relates to a method for spinning a thermoplastic material into multifilament filaments comprising the steps of extruding the molten material through a spinneret having a plurality of orifices to form a filament comprising a plurality of filaments and, after solidification, winding them into filaments / yarns; and, cooling said tows below the spinneret. [0002] The invention also relates to polyester filament yarns and cords comprising such polyester filament yarns. Background technique [0003] A method of this type is known from EP-A-1079008. During spinning, the newly extruded monofilaments are supported by an air flow during their forward movement. In this case, the cooling also takes place substantially by means of a coolant flow blown parallel to the filaments. Good results are usually obtained with this type of cooling, especially at higher extraction rates. [0004] Cooling of thermoplastic polymers is undoubtedly complex and de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/088D01D5/092D01F6/62D02G3/36
CPCD01D5/088D01F6/62D01D5/092Y10T428/2913Y10T428/2969
Inventor H·米德尔扬斯E·霍伊费尔林B·克林斯J·F·布尔
Owner DIOLEN IND FIBERS