Patent ID: 6372331
Filing Date: 2002-04-16
Classification: B32B,Y10T

Abstract:
A biodegradable card which is a laminated member having over-layers whose major component is a composition comprising 60-100 wt % of a polylactic acid and 40-0 wt % of a biodegradable aliphatic polyester having a glass transition temperature (Tg) of 0Â° C. or under on both sides of a core layer whose major component is a composition comprising 40-90 wt % of a polylactic acid and 60-10 wt % of a biodegradable aliphatic polyester having a glass transition temperature (Tg) of 0Â° C. or under, characterized in that for said core layer and said over-layers, the crystallinities {(&Dgr;Hm-&Dgr;Hc))/&Dgr;Hm} converted from the melting calorie after crystallizing (&Dgr;Hm) of the polylactic acid portion when the temperature is raised, and the crystallizing calorie (&Dgr;Hc) of the polylactic acid portion generated due to crystallization during the temperature rise are 0.8 or over and 0.9 or over, respectively.