POLYLACTIC ACID FILM

摘要

PROBLEM TO BE SOLVED: To provide a biodegradable polylactic acid film a having high transparency and practical mechanical strength with less brittleness and also high thermal stability. SOLUTION: This polylactic acid film has the planar orientation degreeΔP of >=3.0×10<-3> and the difference (ΔHm-ΔHc) of >=20 J/g (where,ΔHm is the heat of crystal fusion in film temperature rising; andΔHc is the heat of crystallization of film during the film temperature rise).