Multilayer packing material

Abstract

Abstract PURPOSE:To enhance heat sealability, fragrance retentivity and pinhole resistance by constituting a heat sealing layer of a polymer composition consisting of copolymerized polyester with a specific m.p. whose constituents consist of terephthalic acid, isophthalic acid and ethylene glycol and an ethylene/(meth) acrylic acid copolymer or a metal salt thereof. CONSTITUTION:A packing material consists of a surface base material layer and a heat sealing layer and the heat sealing layer is composed of a polymer composition consisting of 60-90 pts.wt. of copolymerized polyester with an m.p. of 205-240 deg.C whose constituents consist of terephthalic acid, isophthalic acid and ethylene glycol and 10-40 pts.wt. of an ethylene/(meth)acrylic acid copolymer or a metal salt thereof. (Meth)acrylic acid means acrylic acid or methacrylic acid. As the base material layer, a metal, paper and various thermoplastic resins are used.

Inventors

• 👤 Hiroshi Ito
• 👤 伊東　浩史
• 👤 Yoshio Mishima
• 👤 三島　義男

Bibliographic Details