| abstract |
(57) [Summary] [Object] To provide a degradable laminate material composed of paper and a polylactic acid-based polymer film. [Structure] The degree of plane orientation ΔP is 3.0 × 10 −3 or more, Moreover, the difference (ΔHm-ΔHc) between the heat of crystal fusion ΔHm when the film is heated and the heat of crystallization ΔHc generated by crystallization during temperature increase is 20 J / g or more and {(ΔHm- A degradable laminate material comprising a paper and an oriented polylactic acid-based film having a ΔHc) / ΔHm} of 0.75 or more. [Effect] It does not make up for the defects of paper and has excellent properties as a composite material. |