Process for making a spun-filament fleece

Details Process for making a spun-filament fleece Process for making a spun-filament fleece

1989-03-13

1991-07-02

Simmons, David A.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Bulk deposition of particles by differential fluid pressure

264103, 2642108, 264555, D02B 122

Patent

active

050283758

ABSTRACT:
The process for making a spun-filament fleece from at least two stretched thermoplastic monofilaments made of a thermoplastic material includes feeding thermoplastic material to at least two spinnerets each including a separate group or plurality of spinning nozzles arranged in rows over a rectangular cross section, then exposing each band or group of thermoplastic filaments issuing from each group of spinning nozzles separately to a transverse flow of cooling air in a blower shaft, next stretching the bands or groups of thermoplastic filaments jointly in a common central stretching shaft by outflowing stretching air, then depositing jointly the thermoplastic filaments which have been stretched in a spun band moving below the stretching shaft continuously to form the spun-filament fleece and drawing a suction air flow through the spun band and/or the spun-filament fleece being formed.

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