Method of forming plastisol gaskets in container closures...

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

B - Operations, Transporting

29

C

18/55

B29C 41/20 (2006.01) B29C 35/12 (2006.01) B29C 70/80 (2006.01) B29C 33/02 (2006.01)

Patent

CA 1259463

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

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