Patent ID: 8632866

Claim:
A polyester laminate which consists of: (a) one polyester layer C, in the form of a film, consisting of either (1) a polyester resin A wherein from 5 to 80 mol % of total diol units is a diol unit having a cyclic acetal structure, or (2) a combination of the polyester resin A and a polyester resin B which is a polyester resin other than the polyester resin A, (b) a paper layer E, and (c) another polyester layer C, in the form of a film, wherein said another polyester layer C consists of either (1′) a polyester resin A′ wherein from 5 to 80 mol % of total diol units is a diol unit having a cyclic acetal structure, or (2′) a combination of the polyester resin A′ and a polyester resin B′ which is a polyester resin other than the polyester resin A′, wherein said one polyester layer C and said another polyester layer C sandwich said paper layer E, and wherein each of the polyester resins B and B′ is at least one compound selected from the group consisting of poly(ethylene terephthalate), poly(butylene terephthalate), terephthalic acid-1,4-cyclohexanedimethanol-ethylene glycol copolymer, isophthalic acid-terephthalic acid-ethylene glycol copolymer, poly(propylene terephthalate), poly(trimethylene terephthalate), poly(ethylene naphthalate), terephthalic acid-2,6-naphthalenedicarboxylic acid-ethylene glycol-1,4-cyclohexanedimethanol copolymer, and polyarylate.