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Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers

a technology of hollow fibers and spinnerets, which is applied in the direction of hollow filament manufacturing, filament/thread forming, textiles and papermaking, etc., can solve the problems of higher investment and a more complex type of system engineering, and achieve the effect of improving the crimping intensity of the produced hollow fibers and simple manner

Inactive Publication Date: 2016-09-15
OERLIKON TEXTILE GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method for producing self-crimping hollow fibers with improved crimping intensity using a single melt flow. The hollow fibers can be produced in a simple manner. The difference in opening-segment width between the first and second segments can lead to hollow fibers with high crimping intensity. The wall thickness of the second hollow-fiber wall portion can also improve crimping intensity. After fusion connection and heating, the crimping intensity can be further enhanced by post-shrinkage.

Problems solved by technology

These fibers have a distinctly higher crimping intensity but require systems engineering of a distinctly more complex type and, thus, higher investment.

Method used

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  • Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers
  • Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers
  • Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers

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Embodiment Construction

[0038]FIG. 1 shows a device for producing spinning fibers. In a container 8, polymeric material can be arranged. After drying in a drying device 6, the polymeric material can be molten in a melting device 4. In a spinneret 1, this molten material will be pressed through capillaries. By use of press and metering pumps, the melt will be pressed through the capillaries and be withdrawn in the form of filaments and respectively fibers. After exiting from the spinneret, the filaments will be cooled in a blow-out hopper, not shown, in the region 12 and then can be wound onto drums or placed in vessels at a constant speed. The filaments can then directly or later be drafted in drafting devices 12, 14. In the present case, the filaments are hollow fibers 2.

[0039]In FIG. 2, the spinneret 1 is shown in greater detail from below. The spinneret comprises a plurality of capillaries 18. The capillaries 18 are the nozzle holes. As shown in FIG. 2, the capillary 18 comprises at least one segmented ...

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Abstract

The invention relates to a spinneret for extruding self-crimping hollow fibers including at least one capillary. The at least one capillary has at least one segmented opening, which has at least two opening segments spaced apart from each other in the cross-section. A first opening segment of the at least two opening segments has a first opening-segment width and a second opening segment of the at least two opening segments has a second opening-segment width. The second opening-segment width is wider than the first opening-segment width.

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to a spinneret for extruding hollow fibers, a self-crimping hollow fiber, and a method for producing self-crimping hollow fibers.[0002]From the state of the art, self-crimping hollow fibers are known which are extruded by means of a spinneret. There are known spinnerets comprising capillaries, wherein each capillary comprises a C-shaped opening. From said C-shaped opening, a hollow fiber profile will be extruded. After exiting from the opening, the ends of the extruded C-shaped hollow-fiber profile will become bonded to each other in the form of a hollow-fiber wall portion by fusion and will form a hollow fiber having a hollow-fiber wall. After the drafting of the hollow fibers, these will become crimped three-dimensionally under the effect of the spin orientations that have been generated. Further, such self-crimping hollow fibers can be generated by additional introduction of two melt flows which again will result in spin orie...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01D4/02D01D5/22D01D5/32D01D5/24
CPCD01D4/02D01D5/32D01D5/22D01D5/24
Inventor GLAWION, ERWINFINDER, HORST
Owner OERLIKON TEXTILE GMBH & CO KG
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