a laminate comprising a thermoplastic polymer essentially consisting of polylactic acid , a copolymer of lactic acid and hydroxycarboxylic acid or a mixture of polylactic acid with a copolymer of lactic acid and hydroxycarboxylic acid , and a regenerated cellulose film , paper , leather , cloth , or fiber . the laminate undergoes degradability in the natural environment , is excellent in transparency , gloss and moisture - proofness , has high strength and can be used for various packaging materials .