| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a biodegradable molded container which effectively prevents a biodegradable foam material mainly made of starch or a starch derivative from bing exposed at a lip part and which can be used satisfactorily in the existence of water. <P>SOLUTION: The lip part 14 of a biodegradable molded container is treated with lip processing. The lip processing comprises: a step of base material pressing and separating where, on the lip part 14, only the base material 11 made of a biodegradable foam molded material held by a covering film 12 is pressed and separated; a step of film welding for forming a welded part 16 by welding the film 12 in contact with each other; and a step of cutting the outer peripheral part 15 of the lip part 14 leaving the welded part 16 on the body side. <P>COPYRIGHT: (C)2004,JPO</p> |
