METHOD OF FORMING GASKET INTO CLOSURE FOR VESSEL

摘要

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 DEG to 100 DEG C. by conventional means and then the plastisol is fused in the closure by exposure to a field of radio frequency electrical energy.