Patent ID: 8029892

Claim:
A breathable film comprising a blend of: from 45%-75% of at least one polymer (a) taken from the group comprising an ethylene/alkyl(meth)acrylate copolymer (a1), an optionally neutralized ethylene/alkyl(meth)acrylic acid copolymer (a2), an ethylene/vinyl monomer copolymer (a3), the (a1)/(a2) blend, the (a1)/(a3) blend, the (a2)/(a3) blend and the (a1)/(a2)/(a3) blend; from 3% to 15% of at least one functionalized polyethylene (b) wherein a and b are not of the same and are not both an ethylene /alkyl/(meth)acrylate copolymer; and from 25% to 45% of at least one copolymer (c) having a melting point of between 80 and 150° C. and comprising copolyamide blocks and polyether blocks; said film having a water vapor permeability of about 625 to about 910 g/m 2 /24 h for a thickness of 50 μm, per ASTM E 96.