3.5. Influence of the solubility coefficient (b) and the diffusion
coefficient (Dw) of water in the films on the water vapor
permeabilities (Kw)
Since an important function of a food packaging is to avoid or at
least to decrease moisture transfer between the food and the
surrounding atmosphere, film water vapor permeability should be
as low as possible (Gontard et al., 1992). Water vapor permeabilities
(Kw) are presented in Table 2. Kw values ranged from 9.6 108 g
water/h.m.Pa, for the rice starch films plasticized with 0.2 g