Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1994-12-15
1996-08-13
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264103, 2642108, 26421114, D01D 512, D04H 303
Patent
active
055453716
ABSTRACT:
An apparatus, process and product by process for producing a non-woven polymeric fabric web, such as a spunbond web, having filaments of 0.1 to 3.0 denier with equivalent production rates. The apparatus includes a polymer filament extruder and a melt spinning device with a spinneret having multiple spaced orifices for extruding a plurality of continuous polymeric filaments, a drawing unit that includes a longitudinal elongated slot strategically positioned at a predetermined distance below the spinneret to produce the desired filament diameter, a nozzle for providing an air supply strategically within a drawing unit slot for creating turbulence, and a web forming unit positioned below the slot for collecting the filaments and forming the filaments into a non-woven fabric web. The apparatus may also include a water spray unit positioned adjacent to and surrounding the spinneret for cooling the filaments to prevent premature sticking together of the filaments and enhancing the production rate. The product produced herein is useful in medical and personal hygiene products and filtration materials, including diaper covers, liquid vapor barriers which are breathable and have air permeability.
REFERENCES:
patent: 3802817 (1974-04-01), Matsuki et al.
patent: 4064605 (1977-12-01), Akiyama et al.
patent: 5045271 (1991-09-01), Mente et al.
patent: 5292239 (1994-03-01), Zeldin et al.
Ason Engineering, Inc.
Tentoni Leo B.
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