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EVA (ethylene–vinyl acetate copolymer) containing 20wt% vinyl acetate (VA)—EVA20—was treated with corona discharge and low-pressure air plasma, and the durability of these treatments was monitored for 12 months. The corona discharge treatment was carried out at corona energy of 0.3J/cm 2 and the air plasma treatment at 300W and 10mbar for 3s. Water contact angle values of EVA20 markedly decreased...