| 摘要 |
<p>A flexible permeable container comprising a liquid-permeable flexible bag body having a polygonal top surface 4 and a polygonal bottom surface 5, the top surface and the bottom surface coupled together by means of a side surface 6, the side surface 6 having a bending zone 7 on which the side surface 6 is bent and folded up. The whole of the bag body 2 is folded up by the folding of the side surface 6, so that, even if the amount of contents is increased, the flexible permeable container can remain flat and is free from bulkiness. At the time of extraction, the side surface 6 is unfolded so that the bag body 2 has its internal space enlarged. The extraction efficiency is enhanced by the enlargement of the internal space of the bag body 2. <IMAGE></p> |
