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Process for producing sheath-core staple fibre with a three-dimensional crimp, and corresponding sheath-core staple fibre

A technology of three-dimensional crimping and short fibers, applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve disadvantages and other problems

Inactive Publication Date: 2008-11-12
OERLIKON TEXTILE GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of fiber has very unfavorable characteristics for forming self-crimping, making mechanical crimping unavoidable

Method used

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  • Process for producing sheath-core staple fibre with a three-dimensional crimp, and corresponding sheath-core staple fibre
  • Process for producing sheath-core staple fibre with a three-dimensional crimp, and corresponding sheath-core staple fibre
  • Process for producing sheath-core staple fibre with a three-dimensional crimp, and corresponding sheath-core staple fibre

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Embodiment Construction

[0035] The device components shown in FIGS. 1 and 3 form an exemplary embodiment of a device for carrying out the method according to the invention. This staple fiber manufacturing apparatus has a feature of intermediate storage / temporary storage of fibers extruded by melt spinning before multi-stage processing. As a result, different production speeds and different material flows (volumes) can be realized during melt-spinning of fibers and during multistage processing of fibers and can be optimized for the corresponding process section. In the first stage of the production process, a plurality of sheath-core fibers are extruded and deposited as so-called fiber bundles in cans for intermediate storage.

[0036] An embodiment of such a melt spinning apparatus is shown schematically in several views in FIGS. 1 and 2 . Figure 1 shows the melt spinning equipment in side view, in figure 2 The melt-spinning apparatus is shown in cross-sectional view in . The following description...

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Abstract

The invention relates to a process for producing sheath-core staple fibre with a three-dimensional crimp, and to corresponding sheath-core staple fibre. In this process the fibre, with a symmetrical sheath-core arrangement, is extruded from two different polymer melts, with one polymer component, A, for the core and one polymer component, B, for the sheath. In order to maximize the intensity of the three-dimensional crimping in the fibre, the fibre is cooled with a sharp stream of cooling air, with a quench air velocity of at least 3 m / sec, and, after the fibres have been bundled to a tow, the multi-stage treatment takes place in a fibre line at a maximum temperature load which is below the glass transition temperature of the polymer component B in the sheath of the fibre.; In this way it is possible, after the multi-stage treatment and before the cutting of the fibre, to achieve a high degree of three-dimensional crimp.

Description

technical field [0001] The invention relates to a method for producing sheath-core staple fibers with three-dimensional crimps by extruding and cooling the fibers and by subsequent multistage processing in a fiber line up to cutting the fibers into staple fibers, and also relates to a process consisting of Three-dimensionally crimped sheath-core staple fibers composed of various polymer components. Background technique [0002] Synthetic staple fibers are increasingly used for the production of fibrous nonwovens, wherein in particular the external characteristics of the fibers and the possibility of joining are special characterizing parameters. It has been found here that staple fibers with a sheath-core character, in which the fiber sheath has a thermally bondable polymer material, are particularly suitable for producing precured / reinforced nonwoven layers by thermal bonding. Such nonwoven layers are preferred for multilayer nonwoven materials, since intermingling of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/34D01D5/088D01D5/22D01D5/24D01F8/06D01F8/14D04H1/4291D04H1/435D04H1/541
CPCD01F8/06Y10T442/636D01F8/14Y10T428/2909Y10T442/612
Inventor H·蒂迈尔E·莱比茨克
Owner OERLIKON TEXTILE GMBH & CO KG
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