Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1980-01-21
1981-09-29
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428290, 428332, 428338, 428340, 428369, 428375, 428394, 428395, 428397, D04H 158
Patent
active
042923654
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 continuous 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 wherein said lofted mat is comprised of a lofted mat comprising a plurality of continuous polymeric filaments having an asymmetrical cross-sectional shape, the cross-sectional shape having a major dimension within the range from about 0.00150 inch to about 0.00350 inch, the filaments having a crimp factor within the range from about 0.1 to about 4 waves per inch of filament, said mat having a density within the range from about 0.33 pounds per cubic foot to about 1.74 pounds per cubic foot.
REFERENCES:
patent: 3169899 (1965-02-01), Steuber
patent: 3314122 (1967-04-01), Bundy
patent: 3378398 (1968-04-01), Nottebohn et al.
patent: 3509009 (1970-04-01), Hartmann
patent: 3652753 (1972-03-01), Shemdin
patent: 3716317 (1973-02-01), Williams et al.
patent: 3849241 (1974-11-01), Butin et al.
patent: 4118531 (1978-10-01), Hauser
Kane John L.
Nadkarni Vikas M.
Bell James J.
Dziegielewski Greg
Hudgens Ronald C.
Owens-Corning Fiberglas Corporation
Rywalski Robert F.
LandOfFree
Polymeric mats having continuous filaments with an asymmetrical does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polymeric mats having continuous filaments with an asymmetrical , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymeric mats having continuous filaments with an asymmetrical will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1234300