| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-layer structure excellent in gas barrier properties, the non-adsorption of flavor components, heat-sealing properties at a low temperature and solvent resistance. SOLUTION: The multi-layer structure has a surface layer comprising a modified ethylene-vinyl alcohol copolymer (C). The modified ethylene-vinyl alcohol copolymer (C) is prepared by modifying an unmodified ethylene-vinyl alcohol copolymer (A) with an epoxy compound (B) having a double bond and an epoxy compound (E) not having a double bond. The amount of modification by the (B) is 0.1-10 mol% based on the monomer unit of the ethylene-vinyl alcohol copolymer (A), and the amount of modification by the (E) is 0.1-30 mol% based on the monomer unit of the ethylene-vinyl alcohol copolymer (A). The modified ethylene-vinyl alcohol copolymer (C) is at least partially cross-linked, and the gel fraction of the surface layer is≥3 mass%. COPYRIGHT: (C)2009,JPO&INPIT
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