| abstract |
(57) [Summary] [Purpose] It has excellent biodegradability and the cells are closed cells. Provided is a collapsible foam molded article having a high expansion ratio and a good surface condition of the component body. A composition comprising water-containing starch, a water-containing saponified ethylene-vinyl acetate copolymer, a nonionic surfactant, a thickener, and an inorganic filler is melted at 130 to 200 ° C., and a nozzle of an extruder is used. The shear rate of the melt passing through is set to 10 3 sec -1 and foamed to obtain a foam. |