Method and device for producing a low-shrinking smooth yarn

A low-shrinkage, straight-filament technology that is used in stretch spinning, textile and papermaking, heat treatment of rayon, etc., and can solve problems such as unstable filaments, large spanning distances, feeding, etc.

Inactive Publication Date: 2008-10-01
SAURER GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, at high filament speeds, long lay-up times require large spanning distances, which can easily lead to an unstable filament feed at very low filament tensions
To eliminate shrinkage in the filament on the finished spool, the result may be that after winding, there are so many forces acting on the spool of filament that the spool cannot be removed from the mandrel

Method used

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  • Method and device for producing a low-shrinking smooth yarn
  • Method and device for producing a low-shrinking smooth yarn
  • Method and device for producing a low-shrinking smooth yarn

Examples

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Embodiment Construction

[0023] Figure 1 is a schematic diagram of a first embodiment of an apparatus according to the invention, in which the method of the invention is employed.

[0024] The apparatus comprises a spinning device, wherein the spinning device is formed by a spinning head 1 and a set of spinnerets 15 . The spinneret 1 is connected via a melt feed line 29 to a melt source (not shown here), for example to an extruder. A set of spinnerets 15 is installed on the underside of the spinning head 1, and each spinneret 15 includes a set of spinneret holes through which a single filament bundle 2 is respectively extruded. In this embodiment, for example four spinnerets 15 are shown.

[0025] After extrusion, the individual filament bundles 2 are cooled by cooling air 3 , oiled and moistened in an oiling device 4 and combined into a filament 5 . Although the above description is directed to multifilament filaments, it is basically applicable to monofilament filaments as well.

[0026] After th...

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Abstract

The invention relates to a method and a device for the production of a high-strength, low-shrinking synthetic smooth yarn. After melt-spinning, the filaments are grouped into a thread and drawn. The thread is then compressed into a package under the influence of temperature. Said package is then transported along a certain path so that the thread is relaxed in a stress-free state and under the influence of temperature. The package is subsequently untangled to form the smooth yarn, which is wound to form a spool.

Description

technical field [0001] The present invention relates to a method for producing low-shrinkage synthetic straight filament yarns and a device for carrying out said method. Background technique [0002] For such high-strength straight-filament yarns, which are commonly used, for example, to produce PVC-coated canvas, conveyor belts or V-belts, they need to exhibit little shrinkage under the action of heat when they are further processed. [0003] Therefore, in the production of these straight filament yarns, the filaments are again subjected to increased temperature and reduced tension after the melt spinning and drawing steps so that the filaments can relax. This method is described in EP 0 164 624 B1. [0004] It has been found that low filament tension, temperature and time parameters are important for the shrinkage of the yarn during relaxation. With the device disclosed in EP 0 164 624 B1, it is not possible to adjust the parameters of filament tension, time and temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G1/12D01D5/16D01D10/02D02G1/16
CPCD01D5/16D02G1/127D02G1/125D02G1/122D02G1/12
Inventor 斯特凡·贝克
Owner SAURER GMBH & CO KG
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