Method of forming plastisol gaskets in container closures fabric

Details Method of forming plastisol gaskets in container closures fabric Method of forming plastisol gaskets in container closures fabric

1985-10-21

1987-06-23

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 457, 264 466, 264248, 264268, 264310, 264DIG46, 264DIG60, 264DIG65, 4251748R, B29C 3512

Patent

active

046751394

ABSTRACT:
Gaskets are formed in container closures fabricated from polyolefin resins exhibiting substantially no response to heat activation by radio frequency electrical energy by introducing a vinyl chloride plastisol containing a vinyl chloride polymer resin and a plasticizer having a loss factor in the range of 0.1-12 into the closure. The closure is preheated to 55.degree. to 100.degree. C. by conventional means and then the plastisol is fused in the closure by exposure to a field of radio frequency electrical energy.

REFERENCES:
patent: 3639190 (1972-02-01), Brooke et al.
patent: 3791906 (1974-02-01), Farkas
patent: 3804663 (1974-04-01), Clark
patent: 4296053 (1981-10-01), Doerer et al.
patent: 4304744 (1981-12-01), Stroud
patent: 4554347 (1985-11-01), Hawkes, Jr.

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