| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide superior surface glossiness, surface protection properties and the like by forming skin layers composed of polylactic acid and polycaprolacton of specified wt.% on both faces of a core layer composed of a copolymer of 3-hidroxybutyrate and 3-hydroxybarirate and polylatitic acid of specified wt.%. SOLUTION: Skin layers constituted of a composition composed of polylactic acid of 95-60wt.% and polycaprolaton of 5-40wt.% as essential components are laminated on both faces of a core layer constituted of a composition composed of a copolymer, which is composed of 3-hydroxylbutylate and 3- hydroxyvalerate as aliphatic polyester biodegradable resin having the melting point of 100-180 deg.C, of 90-40wt.% and biosynthesized by hydrogen bacteria of microbes or the like and polylactic acid of 10-60wt.% as essential components. Superior surface glossiness, surface protection properties, strength, rigidity and stamping properties of emboss characters or the like can be provided by the arrangement.</p> |
