| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a biodegradable packing body which shows superior adhesion and keeps easily unsealable properties, and adhesive force and does not show a blocking phenomenon, even at a specific temperature by using a film made of a mixture containing polycaprolactone as a biogradable plastic film for a lid material which becomes thermally adhesive. SOLUTION: This biodegradable packing body 1 is formed of an outer covering 3, equipped with a storing part, which is vacuum-molded to the shape of an article using a polymer sheet composed mainly of lactic acid, to the surface of the head-adhesive part 4 of which a lid material 7 molded by laminating a biodegradable film 6 on a base material 5 such as cardboard, is thermally bonded through the biodegradable film 6. The biodgradable plastic film 6 used for the heat-adhesive film layer of the lid material 7 is a film composed of a mixture of polycaprolactone. Therefore, the easy-tear properties of the lid material 7 are not deteriorated, even when it is thermally bonded at a temperature of 120 deg.C or lower. In addition, the mouth of the packing body 1 is not opened, even when exposed to an environment of 80 deg.C. Blocking of the lid material 7 is also prevented.</p> |
