Patent ID: 8075967

Claim:
A blended composition comprising or produced from a humidity-dependent composition and a crystallizable polymer wherein the humidity-dependent composition has a ratio of wet cup permeance to dry cup permeance greater than 10, measured according to ASTM E 96-00 at a temperature of 23° C.; the wet cup permeance is determined at an average relative humidity of 75%; and the dry cup permeance is determined at an average relative humidity of 25%; and the crystallizable polymer has a first order transition point T m from 0° C. to 40° C. and a heat of fusion of at least 5 J/g and is sufficiently permeable to oxygen, carbon dioxide, and/or water vapor; and the polymeric material exhibiting an increase in permeability to at least one of oxygen, carbon dioxide or water vapor by a factor of at least 2.5 over a temperature range of 10° C. between 0° C. and 40° C.