| 摘要 |
<p>It is intended to provide a process for producing a foamed article whereby, in case of producing a foamed article by using starch as one of polymer compounds to be molten and mixing it with another polymer compound having a different melt viscosity, the uniform fluidity of the molten mixture essentially required in obtain stable foam properties is ensured to thereby give a stable foamed article which has excellent heat insulating properties as a foamed article having thin bubble walls and can be industrially produced; and a foamed article produced by this process. In the production of a foamed article made of a plastic resin containing a vegetable fibrous material (ground paper, milled wood, etc.) and starch, water is added to the vegetable fibrous material and starch followed by mixing. This process involves, between the step of producing pellets by aggregating starch molecule spheres with the vegetable fibrous material and aggregating the starch molecule spheres with each other without gelatinizing the starch and the step of foaming a mixture of the pellets with a plastic resin, the step of drying the pellets at the temperature lower than the gelatinization temperature of the starch.</p> |
