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Method and apparatus for making nonwoven from continuous filaments

a technology of continuous filaments and nonwovens, applied in the direction of filament/thread forming, melt spinning methods, weaving, etc., can solve the problems of limiting the choice of material for the strip of nonwoven, affecting the desired soft hand of the nonwoven strip, and provisions that have not yet been proved, so as to achieve simple and cost-effective, simple and reproducible, and low material and labor costs

Inactive Publication Date: 2017-11-02
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides an apparatus and method for producing a nonwoven with a 3D structure that is simple and efficient. The nonwoven has a soft hand and is aesthetically perfect. The apparatus includes a mesh belt and a plugged opening, which creates a lateral air motion that causes the filaments in the air stream to deposit onto the open mesh belt areas. The invention allows for a nonwoven with locally varying weights per unit of surface area to be produced in a simple and cost-effective way. It also provides a solution for producing a 3D-structured nonwoven with a soft hand in a simple and replicable way. The apparatus and method are distinguished by low material and labor costs and functional safety and security.

Problems solved by technology

The deformation then also causes compacting; the overall strip of nonwoven becomes flatter, which impairs the desired soft hand of the strip of nonwoven.
However, this limits the choice of material for the strip of nonwoven, since many kinds of polymer fibers cannot be hot-air-consolidated without problems.
In the case of continuous filaments, these provisions have furthermore not proven themselves over time.
These provisions are disruptive and likely to produce flaws and have not proven themselves in practice.

Method used

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  • Method and apparatus for making nonwoven from continuous filaments
  • Method and apparatus for making nonwoven from continuous filaments
  • Method and apparatus for making nonwoven from continuous filaments

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Embodiment Construction

[0046]The drawings shows an apparatus according to the invention for making nonwoven 1 from continuous filaments 2. In a particularly preferred embodiment and in this illustrated embodiment, this is a spunbond apparatus for making spunbond nonwoven 1 or spun nonwoven 1. The continuous filaments 2 preferably are of thermoplastic or essentially of thermoplastic. In the apparatus of the invention, the continuous filaments 2 are spun with the aid of a spinning device a spinneret 3. After that, the continuous filaments 2 are cooled in a cooler 4. This cooler 4 preferably and in the illustrated embodiment has two compartments 4a and 4b, one above the other or one after the other in the filament-travel direction, and that introduce cooling air of a variable temperature into the filament flow chamber. Downstream of the cooler 4 in the filament-travel direction is a stretcher 5 that preferably and in the illustrated embodiment has both an intermediate passage 6 that narrows in the flow direc...

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Abstract

An apparatus for making nonwoven has a spinning device for spinning continuous filaments and moving the spun filaments in a vertical travel direction along a vertical travel path and a mesh belt below the spinning device, traveling in a horizontal direction, and having a multiplicity of vertically throughgoing openings distributed generally uniformly over its surface and of which a portion are plugged. A cooler and a stretcher are provided along the path downstream of the spinning device and above the belt for cooling and stretching the filaments and depositing the cooled and stretched filaments at a predetermined deposition location on the belt. A blower underneath the belt at the deposition location aspirates air through the openings and thereby holds the deposited filaments down on the belt.

Description

FIELD OF THE INVENTION[0001]The present invention relates to making a nonwoven. More particularly this invention concerns making nonwoven from continuous filaments.BACKGROUND OF THE INVENTION[0002]An apparatus for making nonwoven from continuous filaments, in particular thermoplastic monofilament, typically has at least one spinning device for spinning the filaments being provided, a device for cooling and stretching the spun filaments, and a device for depositing the drawn filaments to form the nonwoven. Continuous filaments differ because of their quasi-endless length from staple fibers that have much lesser lengths, for instance of 10 mm to 60 mm.[0003]An apparatus and method for making nonwoven of the type described above are known in practice in various embodiments. It is often desirable to produce structured nonwoven or spun nonwoven with a “3D structure” with varying local thicknesses or porosities. Various provisions for this purpose are also known in practice. For instance,...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01D5/088D01D5/098D01D10/00D04H3/005
CPCD01D5/088D01D5/0985D10B2401/041D04H3/005D01D10/00D01D5/12D01D11/02D03D13/008D04H3/02D04H3/14D04H3/16D04H17/00
Inventor SOMMER, SEBASTIANWAGNER, TOBIASLINKE, GEROLD
Owner THE PROCTER & GAMBLE COMPANY
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