Process for the production of non-woven material from endless fi

Details Process for the production of non-woven material from endless fi Process for the production of non-woven material from endless fi

1986-11-20

1989-04-04

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

2642102, 2642108, 26421114, 156167, 19299, D01D 1102

Patent

active

048184667

ABSTRACT:
To produce non-woven materials, endless filaments in the form of a warp are drawn off a filament draw-off nozzle to which are joined a filament offlet, a filament guide tube and a spreading extruder. An amount of compressed air under high pressure is admitted to the filament draw-off nozzle, and by means of the spreading extruder provided with Coanda shells the warp is loosened before impacting on a screen conveyor. In order to achieve as evenly as possible a distribution and loosening of the warp, slot nozzles are provided on either side of the spreading extruder, which are supplied with a reduced amount of compressed air under relative low pressure. Simultaneously, a reduction of the amount of compressed air at the filament drawoff nozzle takes place. The additional air, supplied via the slot nozzles, surprisingly makes possible a considerable improvement in the spreading of the warp, and at the same time a savings in energy is also achieved in connection with the reduction of the amount of compressed air at the filament draw-off nozzle, while the filament draw-off force is maintained.

REFERENCES:
patent: 3734803 (1973-05-01), Lipscomb et al.
patent: 3736211 (1973-05-01), Lipscomb et al.
patent: 3738894 (1973-06-01), Lipscomb et al.
patent: 3991250 (1976-11-01), Hartmann et al.
patent: 4346504 (1982-08-01), Birk et al.
patent: 4557637 (1985-12-01), Barclay et al.
patent: 4578134 (1986-03-01), Hartmann

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