Process for making a filter having a continuous density gradient

Details Process for making a filter having a continuous density gradient Process for making a filter having a continuous density gradient

1986-03-04

1988-03-15

Czaja, Donald E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

55DIG5, 156181, 156283, 156285, D04H 312

Patent

active

047311355

ABSTRACT:
A filter for removing dusts from fluids, which comprises fibers bonded each other with a binder and/or hot-pressed, having a fiber density of 0.01 to 0.1 at the side of inflow of fluid to be treated and a fiber density of 0.05 to 0.5 at the side of outflow of the fluid with a continuous fiber density gradient and having a uniform distribution of fiber material in direction of thickness, and a process for the production thereof. The filter is particularly useful as an air filter for automobiles or air conditioner.

REFERENCES:
patent: 2476282 (1949-07-01), Castellan
patent: 3102014 (1963-08-01), Aitkenhead
patent: 3399516 (1968-09-01), Hough, Jr. et al.
patent: 3418187 (1968-12-01), Reeder et al.
patent: 3463689 (1969-08-01), Palmai
patent: 3904798 (1975-09-01), Vogt et al.
patent: 4164400 (1979-08-01), Wald
patent: 4257791 (1981-03-01), Wald

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