Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Bulk deposition of particles by differential fluid pressure
Patent
1981-06-01
1982-11-16
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Bulk deposition of particles by differential fluid pressure
264168, 264177F, 2642108, B24J 500
Patent
active
043594450
ABSTRACT:
A lofted mat of filaments is produced from process and apparatus including: supplying a plurality of streams of molten polymeric material; attenuating said streams of material into continous filaments through the action of a stream of fluid moving from an attenuation means; said filaments being entrained in said fluid moving from said attenuation means, said filaments having non-uniform residual stresses established therein; moving said stream of fluid and filaments along a first surface positioned intermediate said attenuation means and a foraminous surface; establishing a vacuum at said foraminous surface; directing said stream of fluid and filaments into said foraminous surface obliquely oriented with respect to said first surface such that a first portion of said fluid separates from the filaments and passes through said foraminous surface and a second portion of said fluid moves said filaments along the foraminous surface; collecting said filaments in a randomly dispersed, substantially uniform layer having a first thickness; passing said layer through crimp inducing means adapted to permit said unbalanced, residual stresses to randomly crimp said filaments to form said lofted mat having a second thickness greater than said first thickness.
REFERENCES:
patent: 3314122 (1967-04-01), Bundy
patent: 3509009 (1970-04-01), Hartmann
patent: 3652753 (1972-03-01), Shemdin
patent: 3781393 (1973-12-01), Feltgen et al.
patent: 3849241 (1974-11-01), Butin et al.
patent: 4098312 (1978-06-01), Haley
Kane John L.
Nadkarni Vikas M.
Dziegielewski Greg
Hudgens Ronald C.
Owens-Corning Fiberglas Corporation
Rywalski Robert F.
Woo Jay H.
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