Exposure of Workers to Intense RF Electric Fields that Leak from Plastic Sealers

This paper presents the results of an environmental investigation in a plastic-ware industry using rf sealers. Environmental measurements have demonstrated the presence of strong electric fields the intensity of which: (1) reaches significant levels from the health-protection point of view only in proximity to the applicators; (2) often exceeds the maximal levels allowed by all standards for short duration exposures, especially in the region of the hands. Results of a cross-sectional study on the health of 63 female workers are related to the observed rf exposure. A statistically significant correlation was found to exist between rf exposure and some minor health effects - eye irritation, upper limb paresthesias, and vitreous body disorganization.