Method of making a rigidized fiber filter element

Details Method of making a rigidized fiber filter element Method of making a rigidized fiber filter element

1992-09-25

1994-03-01

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

55528, 210507, 210508, 264342R, 264DIG19, 264DIG48, 264DIG71, 264122, B01D 3916

Patent

active

052905020

ABSTRACT:
A rigidized fiber filter element is produced from a precursor fiber web. The precursor fiber web contains heat-shrinkable fibers or binder fibers or both. The web is exposed to temperatures sufficiently elevated to cause shrinkage of the fibers or melting of the binder. After cooling the web, the filter elements produced are self-supporting, and may have densities up to 500 kg/m.sup.3 to improve filtration while retaining good functional characteristics for operating pressure drop and air permeability. Rigidized fiber filter elements can be constructed of one material, and thus may be suitable for recycling.

REFERENCES:
patent: 2354022 (1944-07-01), Hubert et al.
patent: 2396712 (1946-03-01), Luttge et al.
patent: 3015367 (1962-01-01), Smith et al.
patent: 3246767 (1966-04-01), Pall et al.
patent: 3251475 (1966-05-01), Till et al.
patent: 3381070 (1968-04-01), Sublett et al.
patent: 4018862 (1977-04-01), Saito
patent: 4195112 (1980-03-01), Sheard et al.

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