| abstract |
The present invention relates to a starch-based fully-biodegradable material which comprises 65-95wt% plant starch, 1-15wt% reactive plasticizer, 0.1-5wt% reactive compatibilizer, 1-20wt% biodegradable polymer. The preparation process of the starch-based fully-biodegradable material is as follows: 1) adding the plant starch and said reactive plasticizer to a high speed mixer to mix; 2) when its temperature rises to 80-200°C, adding degradable polymer thereto; 3) cooling and discharging the material to obtain powder; 4) then adding said powder to a twin screw extruder, adding said reactive compatibilizer thereto at 120-130°C, and extruding this sheet, polishing, cooling and sizing, thereby completing the invention. After discarding, the fully-biodegradable material according to the invention can be composted or used as mediums for soiless culture. It can be used to manufacture disposable tableware, packing container and vibration-damping filler and the like. |