| 摘要 |
<p>PURPOSE:To obtain a plastic container which prevents mold from proliferating on using and serves for environmental preservation due to biological decomposition after disposal, by providing anti-bacterial property at least on the outermost superficial layer of the biologically decomposing plastic container. CONSTITUTION:A biologically decomposing plastic, polyhydroxybutylate- polyhydroxyvarylate polymer (3HB-3HV) for instance is used for the inner layer 4. And the container is formed as a double layer structural one that the outermost layer 1 or 3 is the anti-bacterial layer, 3HB-3HV, kneaded with anti-bacterial materials. Anti-bacterial metals or metal compounds such as silver, copper, and zinc are mixed in an inorganic material as the anti-bacterial materials. The container is designed not to be decomposed while used for a container but to be decomposed after disposal. And the gradually effective anti-bacterial chemicals is used to control the biologically decomposing speed.</p> |
