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Method for producing meltblown nonwoven, and meltblown plant

A non-woven fabric, meltblown technology, applied in melt spinning, textiles and papermaking, nonwovens, etc., to reduce operational complexity, reduce production, and improve safety.

Pending Publication Date: 2021-02-12
OERLIKON TEXTILE GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the operation of the meltblown equipment, usually only the properties of the meltblown nonwoven fabric to be produced are known, not the unit parameters of the meltblown equipment required for this

Method used

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  • Method for producing meltblown nonwoven, and meltblown plant
  • Method for producing meltblown nonwoven, and meltblown plant
  • Method for producing meltblown nonwoven, and meltblown plant

Examples

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Embodiment Construction

[0028] with the help of figure 1 with figure 2 Explaining the melt blown equipment according to the present invention, figure 1 shows the front view, figure 2 A side view is shown. The same reference numbers are used in both figures. The frame 4 is used to receive the unit of the melt blown equipment. In addition to arranging the unit on the bottom floor, such a unit can also be further positioned on the extruder level 5 above it. An extruder 6 and a melt pump 9 are arranged on the extruder level 5 , and the outlet of the extruder 6 is connected with the inlet of the mold 11 through a melt pipeline 8 .

[0029] The extruder 6, the melt line 8 and the die 11 are designed to be heatable. For the sake of clarity, the heaters required for this are not shown. The extruder 6 has an extruder motor 7 for driving the extruder. Synthetic polymers or plastics are usually fed into the extruder 6 in the form of pellets during plant operation. For example, polypropylene, polyethy...

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Abstract

The invention relates to a method and to an associated apparatus for producing a meltblown nonwoven, in which a plurality of synthetic filaments are extruded from a tool, stretched by means of hot process air and are laid on a band screen to form a meltblown nonwoven. In the region where the filaments are laid, an extraction flow through the band screen is assisted by means of an extraction devicearranged below the band screen. In known methods and apparatuses, it is very awkward to set an air permeability of the meltblown nonwoven to a required value, as is often required in the case of filter applications. Therefore, an air permeability of the meltblown nonwoven is measured by means of an air permeability sensor arranged below or above the meltblown nonwoven which is running past. By automatic adaptation of the process air and / or the extraction flow through the band screen and / or a distance between tool and band screen, a target value of the air permeability of the meltblown nonwoven is achieved by means of a control device.

Description

technical field [0001] The invention relates to a method for producing meltblown nonwovens according to the preamble of claim 1 and to a meltblown plant according to the preamble of claim 8 . Background technique [0002] Meltblown plants for producing meltblown nonwovens are sufficiently known in the prior art. Such a meltblowing device is described, for example, in DE 10 2016 001 921 A1. Molten synthetic polymer is fed under pressure to the mold in such meltblown equipment by means of a melt pump. Molten polymer is produced through an extruder where plastic pellets are melted and the melt is conveyed through the extruder to a melt pump. Here the plastic flows through the melt line. A screen changeover device is usually arranged between the extruder and the melt pump, through which the impurities are filtered out of the melt. Finally, the plastic melt in the die flows through a nozzle tip that has an array of nozzle holes through which the polymer is extruded to form mu...

Claims

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Application Information

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IPC IPC(8): D04H3/03D01D5/098
CPCD04H3/03D01D5/0985
Inventor M·拉廷斯基
Owner OERLIKON TEXTILE GMBH & CO KG