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Method for melt spinning, stretching and winding multifilament thread and device for carrying out same

A technology of drawing yarn and melt spinning, applied in the field of devices implementing the method, can solve problems such as high equipment costs, and achieve the effect of efficient treatment

Inactive Publication Date: 2012-09-05
OERLIKON TEXTILE GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, high equipment costs are required to produce fully drawn yarns

Method used

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  • Method for melt spinning, stretching and winding multifilament thread and device for carrying out same
  • Method for melt spinning, stretching and winding multifilament thread and device for carrying out same
  • Method for melt spinning, stretching and winding multifilament thread and device for carrying out same

Examples

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Embodiment Construction

[0043] figure 1 A first exemplary embodiment of a device according to the invention for carrying out the method according to the invention for producing FDY yarns is shown. For the melt-spinning of multifilaments, a heatable spinning head 1 is provided, which has spinning nozzles 3 with a plurality of nozzle openings on its lower side and a melt feed pipe 2 on its upper side. The melt supply line 2 is connected to a melt source not shown here, for example an extruder. Further melt-guiding and melt-transporting components can be arranged in the spinneret, which will not be discussed in detail here.

[0044] In this exemplary embodiment, the spinneret 1 has only one spinneret 3 on its underside. In practice, however, spinnerets of this type are equipped with a plurality of spinning nozzles arranged in a row in order to simultaneously produce a plurality of parallel yarns side by side. However, since the number of threads has no influence on the method according to the inventi...

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Abstract

The invention relates to a method for melt spinning, stretching and winding a multifilament thread to form an FDY yarn, and a device for carrying out the method. First, a plurality of filaments made from a thermoplastic melt are extruded, cooled to a temperature below the glass transition temperature of the plastic material, and combined to form a filament bundle with no addition of a preparationfluid. Then, the filament bundle is drawn off at a speed of greater than 1500 m / min, heated to a temperature above the glass transition temperature of the thermoplastic material and stretched at a stretching speed of greater than 4000 m / min. The filament bundle is led through a hot air atmosphere of a heating tube for providing non-contact heating. Then, the filament bundle is prepared with a preparation fluid and the thread is wound into a coil. In the device according to the invention, the preparation device is disposed downstream of the heating means in the thread direction, wherein the heating means, which is a heating tube with a hot air atmosphere for non-contact heating of the filament bundle, is disposed between the drawing-off galette and the stretching galette.

Description

technical field [0001] The present invention relates to a method for melt-spinning, drawing and winding multifilaments into FDY yarns and a device for carrying out the method. Background technique [0002] A similar method for melt-spinning, drawing and winding multifilaments and a device for carrying out the method are known, for example, from DE 3146054 A1. [0003] When producing synthetic yarns, they are divided into so-called POY filaments and FDY filaments according to the degree of orientation of the molecular chains of the polymer material inside the yarn. Pre-oriented yarn (POY) has a pre-oriented, but not yet stretched structure. Such yarns are preferably further processed in a stretch extrusion process. In contrast, fully drawn yarn (FDY) has an oriented and drawn structure. These yarns can be directly processed into flat products without further treatment. [0004] In order to be able to produce so-called FDY filaments in a single-step process, the freshly ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/08D01D5/098
CPCD01D5/12D01D13/02D01D10/02
Inventor U·恩德斯D·舒尔茨K·舍费尔
Owner OERLIKON TEXTILE GMBH & CO KG
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