Hot melt gaskets and method of forming same

Details Hot melt gaskets and method of forming same Hot melt gaskets and method of forming same

1988-02-26

1989-08-01

Marcus, Stephen

Bottles and jars

Closures

Cap type

428349, 428520, B65D 5300

Patent

active

048527548

ABSTRACT:
A hot melt gasket of two superimposed layers. The first layer contains a large amount of tackifier resin to ensure good adhesion to the closure surface. The second layer contains little or no tackifier resin to ensure a good seal between the closure and container. The hot melt gasket is particularly well suited for use on plastic closures, especially polyolefin closures and more especially polypropylene closures.

REFERENCES:
patent: 3061130 (1962-10-01), Husum
patent: 3581690 (1971-06-01), Zapata
patent: 3637103 (1972-01-01), Ptak
patent: 3917100 (1975-11-01), Dukess
patent: 4151924 (1979-05-01), Jameson
patent: 4261475 (1981-04-01), Baboil
patent: 4295573 (1981-10-01), Terry
patent: 4555436 (1985-11-01), Geurtsen
patent: 4618640 (1986-10-01), Tsuchida
patent: 4629658 (1986-12-01), Lucas
patent: 4671987 (1987-06-01), Knott, II et al.
patent: 4719153 (1988-01-01), Akasawa et al.
patent: 4778699 (1988-10-01), Knox, III et al.

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