| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a biodegradable envelope with which a load to be applied to environments is reduced to prevent environmental pollutions in disposal after unsealing by making use of easiness in disposal of a biodegradable resin. <P>SOLUTION: The biodegradable envelope is formed by using a bag-formed biodegradable envelope sheet 4 which comprises a base 10 made of a biodegradable plastic film or paper, a printed layer 16 applied on one of surfaces thereof comprising a binder mainly consisting of an aliphatic polyester comprising polylactic acid segments and poly-glycerine segments, biodegradable sealant layers 12 and 13 applied on regions to be sealed at ends of the printed layer, and a lid piece 11 for sealing an opening. In addition, a sealing adhesive comprising a natural material is provided at the opening while being covered with a release film made of a biodegradable film. <P>COPYRIGHT: (C)2003,JPO</p> |
