Spinneret for spinning threads, spinning device for spinning threads and method for spinning threads

Abstract

The invention relates to a spinneret for spinning threads from a spinning mass - in the form of a melt or solution of natural or synthetic origin - comprising a rotationally symmetrical spinneret inner part, which in the longitudinal direction thereof has a channel for feeding spinning mass to a spinneret tip part having at least one exit bore. The rotationally symmetrical spinneret inner part is surrounded at least partially by a rotationally symmetrical outer part, wherein in the longitudinal direction between the spinneret inner part and outer part an insulating chamber is formed, in which a gas, preferably air, is received in order to form an insulating gas layer. The invention further relates to a spinning device for spinning threads from a spinning mass, comprising a spinneret part and a gas nozzle part arranged at a distance from the spinneret part. A plurality of spinnerets according to the invention are inserted in the spinneret part and project from the spinneret part, facing the gas nozzle part, and the gas nozzle part comprises a plurality of gas nozzles associated with the spinnerets. The gas nozzles are designed as acceleration nozzles for a gas flow that is conducted through the respective gas nozzle and encompasses the monofilaments. Said spinnerets are used in a method for producing spunbonded materials or yarns from polymers of natural or synthetic origin, in order to build up said materials or yarns from extremely fine threads having an average thread diameter of less than 1 [mu]m. The threads from the individual spinnerets can also be collected using conventional winding mechanisms to form yarns on bobbins.

Description

technical field [0001] The invention relates to a spinneret for spinning yarn from a spinning stock, as stated in the preamble of the independent claim for the device, a spinning device with a plurality of spinnerets and a spinning device for spinning yarn The method, as described in the preamble of the independent method claim. Background technique [0002] Generally, spinning is carried out by longitudinally drawing the filament-forming substance from a spinneret, said longitudinal stretching being carried out mechanically by means such as a winder applying a force to the filament; or by an accompanying gas flow, mainly air Flow is performed aerodynamically, as in spunbond operations, which also includes meltblowing. Thereby, outside the spinneret holes, threads are obtained with a diameter smaller than that of the spinneret holes. [0003] The process differs from split spinning in which multiple filaments are obtained from one orifice by splicing or splitting the liqui...

AI Technical Summary

Problems solved by technology

This disadvantage can be at least partly eliminated by heating the air reaching the spinneret, but this requires higher energy consumption

It is also possible to heat individual spinnerets or spinning nozzles, here also increasing the expenditure on process equipment

Images