| 摘要 |
PURPOSE:To keep buffering characteristics such as strength in a high never against a wide range of changes in application circumstances, by adding a vegetable fibrous component to a starchy component as a raw material and foaming and molding it. CONSTITUTION:A raw material including starch as a chief component and vegetable fiber as other components is foamed and molded to make a porous or sponge-like molding. The starchy component can be selected regardless of the content of amylose. Accordingly, all kinds of starch which are generally used are applicable. Fibers obtained from wooden pulpe, hemp, straw, etc. and further, pulverized or disintegrated materials of waste paper can be used as vegetable fibrous components. Vegetable fibrous component can be used within the range of 10-65wt.% against starchy component. The effect does not bring when the ratio is below 10wt.% and also the foaming condition of raw material gets worse when it is above 65wt.%. Non-purified starch including protain component besides starchy components can be applied. In this case, the sum of vegetable fibrous components and protain components should be within 10-65% based on starchy components. |
