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Disclosed is a process for drawing plastic laminates, which comprises draw-forming a laminate comprising a layer of a polyester composed essentially of ethylene terephthalate units, a gas barrier layer of an olefinvinyl alcohol copolymer and an adhesive layer interposed therebetween under temperatur

Disclosed is a process for drawing plastic laminates, which comprises draw-forming a laminate comprising a layer of a polyester composed essentially of ethylene terephthalate units, a gas barrier layer of an olefinvinyl alcohol copolymer and an adhesive layer interposed therebetween under temperature and draw ratio conditions satisfying a requirement represented by the following formula: [Figure] wherein X stands for the area draw ratio (%) defined by the formula of X=100(tho/th-1) in which tho stands for the thickness of the laminate before draw forming and th stands for the thickness of the laminate after draw forming, Y stands for the vinyl alcohol content (mole %) in the olefinvinyl alcohol copolymer, and t stands for the draw forming temperature (°C.).

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A draw-formed plastic laminate structure obtained by draw-forming a laminate comprising a polyester layer composed essentially of ethylene terephthalate units, a gas barrier layer of an olefin-vinyl alcohol copolymer having a vinyl alcohol content of 40 to 80 mole % and an adhesive layer interposed

A draw-formed plastic laminate structure obtained by draw-forming a laminate comprising a polyester layer composed essentially of ethylene terephthalate units, a gas barrier layer of an olefin-vinyl alcohol copolymer having a vinyl alcohol content of 40 to 80 mole % and an adhesive layer interposed between said two layers, wherein the polyester layer is molecularly oriented in at least one direction so that the density is at least 1.35 g/cc as measured at 20°C., the olefin-vinyl alcohol copolymer is molecularly oriented in at least one direction to such an extent as recognizable by the birefringence method and the adhesive layer is composed of a copolyester, copolyamide or polyester-amide having a glass transition temperature Tg lower than the crystallization temperature of the polyester layer and a dynamic elasticity modulus lower than those of the polyester layer and the olefin-vinyl alcohol copolymer, or a blend thereof.