Process for making a spun-filament fleece from endless synthetic resin filament

Abstract From the Canadian patent

The process for making the spun-filament fleece proceeds in a filament-spinning device having a spinning nozzle system a cooling shaft, a stretching gap, a diffuser shaft a, continuously moving mat-receiving conveyor and a device for feeding, process air and for drawing or removing outflowing air through the mat-receiving conveyor. The cooling shaft has a shaft wall provided with a plurality of air orifices. That allows process air required for cooling to be fed into the cooling shaft. That air flow at least partially is drawn through the mat-receiving conveyor and the spun-filament fleece is formed by the deposited filament loops. The deposited length of the endless filament loops is …