Abstract
A simple method is proposed to detennine a gas permeability of polymeric films.
Carbon dioxide gas was introduced into film packaging and packages were placed in an air-tight container. Head space gas in the container was regularly analyzed using gas
chromatography. The initial void volume in packaging was calcu]ated by the equilibrated gas concentration in the container. The gas permeability of the films was calculated using computer simulation that fitted calculated gas concentrations to experimental data by a least squares method.
Siｍulated values were in exellent agreement with those obtained with a conventional manometer.
The method developed is useful in determining the gas penneability of polymeric films because it doesn't need to use special equipments,
measure the initial void volume of packaging and inject a syringe into packaging．
