Production manner null of constituent and biodegradation Characteristic formation item for biodegradation Characteristic formation item

摘要

PROBLEM TO BE SOLVED: To obtain the subject composition containing a gelatinized material of starch which is subjected to oxidation treatment, capable of improving fluidity when heat melting, enabling injection molding and useful for disposable dishes, etc. ;SOLUTION: This composition comprises (A) only a gelatinized material of starch which is subjected to oxidation treatment or contains the component A and (B) a biodegradable resin. Furthermore, the component A is obtained by heating and mixing (i) starch with (ii) water and (iii) an oxidizing agent (preferably persulfuric acid salt selected from potassium persulfate, ammonium persulfate and sodium persulfate or hydrogen peroxide) or component (ii), (iv)a plasticizer and the component (ii) or the component (iv) and the component (iii), preferably so that 0.01-50 pts.wt. component (iii) or 10-50 pts.wt. component (ii) or 0.1-40pts wt. component (ii) and 1-100 pts.wt. component (iv) or 1-100 pts.wt. component (iv) based on 100 pts.wt. component (i) are used, respectively.;COPYRIGHT: (C)1997,JPO