Polymeric film

摘要

A polymeric film has a substrate layer of polyester material and an antistatic layer containing a polyester/polyalkylene oxide copolymer and a salt, the ratio by weight of copolymer/salt being in the range from 0.1 to 100/1. The copolymer is preferably a polyethylene terephthalate/polyethylene oxide block copolymer and the salt is preferably an alkali metal salt. The film exhibits low Surface Resistivity, even at low Relative Humidity.