Method of increasing the hardness of cigarette filter elements

Details Method of increasing the hardness of cigarette filter elements Method of increasing the hardness of cigarette filter elements

1988-08-24

1990-03-13

Millin, V.

Tobacco

Smoke separator or treater

Having a polymer

131334, 131343, A24D 308, A24D 310, A24D 312

Patent

active

049076094

ABSTRACT:
Filter element and method for increasing the hardness thereof by contacting filter plug material with effective amounts of (a) a water soluble resin (or copolymer) having available chelate bond-forming chemical groups and (b) a water soluble nontoxic salt, the metal cation of the nontoxic salt forming a chelate bond with the chelate bond-forming chemical groups of said water soluble resin.

REFERENCES:
patent: 3635226 (1972-01-01), Horsewell et al.
patent: 4022223 (1977-05-01), Rainer et al.
patent: 4756316 (1988-07-01), Keritsis et al.

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