WATER VAPOR BARRIER COMPOSITION

摘要

The invention generally provides a moisture barrier article comprising a polymer matrix with water vapor permeability equal to or below 1 g mm/(m2 day) at 90% relative humidity difference and the intended temperature of use between 1 5° C and 30° C, and moisture absorbing particles dispersed in the matrix in an essentially uniform manner, wherein the moisture absorbing particles have an average diameter of between 1 and 1 5 micrometers and wherein the article has an average wall thickness to mean particle diameter of at least 10:1.