Method of making biodegradable cigarette filters using water sen

Details Method of making biodegradable cigarette filters using water sen Method of making biodegradable cigarette filters using water sen

1994-03-04

1995-09-26

Yoder, Michele K.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

131361, 131362, 156217, 156327, 493 39, 493 41, A24D 302, B32B 3104

Patent

active

054531446

ABSTRACT:
In a process for manufacturing degradable cigarette filters wherein adhesive is applied to at least one longitudinal edge of the plug wrap paper, a bond is made while the adhesive is molten and the resultant bond is held in compression for sufficient time to prevent bond movement, the improvement which comprises, using as the adhesive, a water sensitive hot melt adhesive comprising 50 to 90 weight percent of a graft copolymer which copolymer comprises 40 to 85 weight percent of at least one vinyl monomer and 15 to 60 weight percent of at least one polyalkylene oxide polymer, 0 to 50 weight percent of a compatible tackifying resin, 5 to 40 weight percent of a polar wax, 0 to 3 weight percent antioxidant and 0 to 30 weight percent of another compatible water soluble or water sensitive thermoplastic polymer; characterized in that the resulting cigarette filter will open when exposed to moisture.

REFERENCES:
patent: 3891584 (1975-06-01), Ray-Chaudhuri et al.
patent: 4074724 (1978-02-01), Morie et al.
patent: 4121599 (1978-10-01), Newton et al.
patent: 5058607 (1991-10-01), Carter et al.
patent: 5217798 (1993-06-01), Brady et al.

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