Apparatus for the continuous manufacture of a spunbond web

Patent metadata

Field	Value
Publication number	US-9951448-B2
Application number	US-201514621787-A
Country	US
Kind code	B2
Filing date	Feb 13, 2015
Priority date	Feb 17, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

An apparatus for the continuous manufacture of a spunbond web from aerodynamically stretched thermoplastic filaments has at least one spinneret, a cooling chamber for cooling the filaments, a stretcher, and a deposition device for the deposition of the filaments to form the spunbond web. At least one filament guide having a plurality of filament-guide gaps opens toward the stretcher between the stretcher and the deposition device, and the filament guide or at least one guide part of the filament guide can be moved such that the filament-guide gap or the stretcher-side openings thereof are displaced transversely to the travel direction of the spunbond web. Thus the filaments or filament bundles guided along or through the filament-guide gap are given a transverse orientation to the travel direction of the spunbond web when deposited onto the deposition device.

First claim

The invention claimed is:

1. An apparatus for the continuous manufacture of a spunbond web from aerodynamically stretched filaments of thermoplastic plastic, the apparatus comprising:
at least one spinneret emitting the filaments,
a cooling chamber for cooling the filaments emitted by the spinneret,
a stretcher for stretching the cooled filaments and forming with the cooling chamber a closed system,
a deposition device for depositing the stretched filaments to form the spunbond web and transporting the spunbond web in a travel direction,
at least one filament guide having a plurality of filament-guide gaps having stretcher side openings open toward the stretcher and provided between the stretcher and the deposition device such that the filaments emerging from the stretcher are divided into filament bundles by the filament guide or by the at least one guide part of the filament guide and pass through the filament guide-gaps or through the stretcher-side openings of the filament-guide gaps, and
means for moving the filament guide or at least one guide part thereof such that the filament-guide gaps or the stretcher-side openings thereof are displaced transversely to the travel direction of the spunbond web and the filament bundles guided along or through the filament-guide gaps are given a transverse orientation to the travel direction of the spunbond web when deposited by the deposition device.

2. The apparatus according to claim 1 , wherein the means moves the filament guide or the at least one guide part of the filament guide in a periodic manner.

3. The apparatus according to claim 1 , wherein
the filament guide has at least one rotatable or rotating shaft,
at least one disk adjoins the shaft,
the disk forms a side wall of at least one of the filament-guide gaps.

4. The apparatus according to claim 1 , wherein
the filament guide has at least one rotatable or rotating shaft extending transversely to the travel direction of the spunbond web,
a plurality of disks is connected to the shaft,
the filament-guide gaps are formed between the disks, and
vertical lines extending from different points of an outer circumference or outer region of a one of the disks to a rotation axis of the shaft have different intersection points with a rotation axis of the shaft.

5. The apparatus according to claim 4 , wherein at least one portion of all of the disks of the shaft or a majority of the disk surface of these disks is/are at a slant or tilted to the rotation axis of the shaft.

6. The apparatus according to claim 3 , wherein at least one deflection of the filament bundles transversely to the travel direction of the spunbond web takes place with each revolution of the shaft.

7. The apparatus according to claim 3 , wherein
a rotation speed of the shaft can be adjusted and
a frequency of deflections of the filament bundles can be adjusted by adjusting the rotation speed of the shaft.

8. An apparatus for the continuous manufacture of a spunbond web from aerodynamically stretched filaments of thermoplastic plastic, the apparatus comprising:
at least one spinneret emitting the filaments,
a cooling chamber for cooling the filaments emitted by the spinneret,
a stretcher for stretching the cooled filaments,
a deposition device for depositing the stretched filaments to form the spunbond web and transporting the spunbond web in a travel direction,
at least one filament guide having a plurality of filament-guide gaps having stretcher side openings open toward the stretcher and provided between the stretcher and the deposition device, the filament guide having at least two rotatable or rotating shafts extending transversely to the travel direction of the spunbond web and a plurality of disks connected to each shaft, and
means for moving the filament guide or the at least two rotatable or rotating shafts thereof such that the filament-guide gaps or the stretcher-side openings thereof are displaced transversely to the travel direction of the spunbond web and filament bundles guided along or through the filament-guide gaps are given a transverse orientation to the travel direction of the spunbond web when deposited by the deposition device.

9. The apparatus according to claim 8 , wherein
the two shafts are at the same vertical level or substantially at the same vertical level and
the disks of one shaft engage into spaces between the disks on the other shaft, and vice versa.

10. The apparatus according to claim 8 , wherein
the at least two shafts are at different vertical levels and
rotation axes of the shafts are offset from one another vertically on opposite sides of a filament curtain emerging from the stretcher.

11. An apparatus for the continuous manufacture of a spunbond web from aerodynamically stretched filaments of thermoplastic plastic, the apparatus comprising:
at least one spinneret emitting the filaments,
a cooling chamber for cooling the filaments emitted by the spinneret,
a stretcher for stretching the cooled filaments,
a deposition device for depositing the stretched filaments to form the spunbond web and transporting the spunbond web in a travel direction,
at least one filament guide having a plurality of filament-guide gaps having stretcher side openings open toward the stretcher and provided between the stretcher and the deposition device, the guide having
at least one shaft rotatable about a rotation axis and extending in the travel direction of the spunbond web, and
at least one disk extending longitudinally of the shaft is connected to each shaft, the at least one shaft being reciprocal along and rotatable about the rotation axis, and
means for moving the filament guide or the at least one shaft thereof such that the filament-guide gaps or the stretcher-side openings thereof are displaced transversely to the travel direction of the spunbond web and filament bundles guided along or through the filament-guide gaps are given a transverse orientation to the travel direction of the spunbond web when deposited by the deposition device.

12. An apparatus for the continuous manufacture of a spunbond web from aerodynamically stretched filaments of thermoplastic plastic, the apparatus comprising:
at least one spinneret emitting the filaments,
a cooling chamber for cooling the filaments emitted by the spinneret,
a stretcher for stretching the cooled filaments,
a deposition device for depositing the stretched filaments to form the spunbond web and transporting the spunbond web in a travel direction,
at least one filament guide having a plurality of filament-guide gaps having stretcher side openings open toward the stretcher and provided between the stretcher and the deposition device, the filament guide having at least two guide parts extending transversely to the travel direction of the spunbond web and each forming a plurality of the filament-guide gaps aligned in a row transversely to the travel direction of the spunbond web, the filament-guide gaps of one of the guide parts being different from the filament-guide gaps of the other guide part, the two guide parts being movable back and forth in the travel direction of the spunbond web such that the filament-guide gaps of the one guide part and the filament-guide gaps of the other guide part are brought into or come into engagement with a filament curtain issuing from the stretcher in alternation, and
means for moving the filament guide or the at least two guide parts thereof such that the filament-guide gaps or the stretcher-side openings thereof are displaced transversely to the travel direction of the spunbond web and filament bundles guided along or through the filament-guide gaps are given a t

Assignees

• Reifenhaeuser Masch

Inventors

• Sommer Sebastian
• Markes Harald
• Klein Alexander
• Oezgoeren Emin
• Goretzki Felix

Classifications

• D04H3/16 Primary

  with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion · CPC title

• D01D5/12

  Stretch-spinning methods ({D01D5/098 takes precedence} finishing by stretching D02J1/22) · CPC title

• D01D11/04

  Fixed guides · CPC title

• D04H3/02

  characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments · CPC title

• D04H3/005

  Synthetic yarns or filaments (D04H3/013 takes precedence) · CPC title