| http://www.w3.org/ns/prov#value | - copolymers, and ionomers derived from sodium, lithium or zinc and an ethylene/unsaturated acid or anhydride, such as an ethylene/methacrylic acid copolymer, and combinations thereof, the concentration of the second thermoplastic polymeric material being from about 1% to about 25% preferably from about 2% to about 10% by weight based on the weight of the core layer.
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