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Device for opening and distributing a bundle of filaments when producing a nonwoven textile web

A non-woven fiber web and production process technology, applied in the field of filament devices and non-woven fiber webs, can solve the problems of slowing down, the solution is not completely satisfactory, and the effect is limited.

Inactive Publication Date: 2002-05-08
赖特卜福叶特公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] However, since this solution is not entirely satisfactory, a solution is proposed in US-A-3,325,906, with a diverging nozzle at the exit of the drawing channel and a nozzle for blowing air on each side of this nozzle. connected to a component that creates a negative pressure in the vicinity of the wall, which attracts the filaments towards the wall, thus tending to open the filament bundle and slowing it down at the same time
[0026] Such a device is satisfactory in theory, but its effect is still limited, because only the filaments mainly located on each side of the filament bundle are "unrolled" thereby, and those located at the center of the bundle are collected in the Filaments that are together but very separated from each other

Method used

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  • Device for opening and distributing a bundle of filaments when producing a nonwoven textile web
  • Device for opening and distributing a bundle of filaments when producing a nonwoven textile web
  • Device for opening and distributing a bundle of filaments when producing a nonwoven textile web

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Embodiment Construction

[0044] With reference to the accompanying drawings, the device of the invention is intended for use on a production line for the production of nonwoven webs composed of continuous synthetic filaments.

[0045] Generally speaking, from figure 1 It is seen that such a mechanical structure includes at least one extruder indicated by reference numeral 1, which is used to send synthetic polymers, such as polyamide, polyethylene, polyester, etc., to a machine for forming a row of long filaments 3 Spinneret 2.

[0046] As a guide, from a specific point of view, the spinneret consists of a flat plate containing many holes, for example 5000 per meter width, and the diameter of the holes depends on the extruded filament, for example 0.5 mm, these holes Distributed in several parallel rows, for example 18 rows and over a spinneret outlet with a width of 140 mm.

[0047] At the outlet of this spinneret there is arranged a cooling assembly 4 for adjusting the temperature of the filaments...

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Abstract

The invention concerns a device for opening and distributing a bundle of filaments when producing a nonwoven textile web by a technique which consists in: extruding melted organic polymer through a die perforated with holes, so as to form a bundle or curtain of filaments; then directing the extruded filaments by drawing by means of one or several fluid jets (5); and finally, receiving the bundle of filaments in the form of a web on a mobile conveyor belt (7). The invention is characterised in that it consists of an assembly (6) arranged downstream of the outlet of the drawing assembly (5) and separate therefrom, said assembly comprising, arranged in the proximity of the drawing slot (F) outlet, a diffuser (10) comprising an intake zone (13) shaped as a convergent nozzle extending over the whole width of the installation opposite the drawing slot outlet producing the web, extended by a divergent nozzle, said assembly being associated with a ramp (11) electrostatically charging the filaments before they are received on the receiving belt (7).

Description

technical field [0001] The present invention relates to an improvement in machinery for producing nonwoven webs, generally nonwoven webs produced by the conventional spunbond process, which nonwoven webs are formed from continuous synthetic filaments. [0002] More precisely, the present invention relates to an improvement in the apparatus for distributing extruded filaments, after drawing, the filaments are randomly distributed on a moving conveyor to form a weight and thickness according to the present invention. Invent the net of the rules of adjustment. Background technique [0003] Looking back at the production process of nonwoven webs produced by spunbond methods decades ago, they generally include: [0004] - the molten organic polymer is extruded from a spinneret having several small holes, thereby forming a bundle or curtain of filaments; [0005] -then, orienting the extruded filaments by drawing through one or more fluid-jet, especially compressed-air devices; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/098D01D11/02D04H3/16
CPCD04H3/011D04H3/009D04H3/16D04H3/007D01D5/0985
Inventor R·马焦L·施密特
Owner 赖特卜福叶特公司
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