PROPYLENE-BASED RESIN COMPOSITION FOR BIAXIALLY ORIENTED BLOW MOLDING AND CONTAINER COMPRISING THE RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a propylene-based resin composition having both a wide range of molding temperature and also uniform extensibility in biaxially oriented blow molding and having shock resistance and to obtain a biaxially oriented blow-molded container consisting thereof. SOLUTION: This propylene-based resin composition for biaxially oriented blow molding is a propylene-based resin composition having two or more crystal melting peaks in the temperature range of 100-170 deg.C by a differential scanning colorimeter (DSC), wherein, Tm1-Tm2>=25 deg.C when each maximal peak top temperature is expressed by Tm1 and minimal temperature by Tm2 in the crystal melting curve, and T70-T30>=20 deg.C when the 70% melting temperature is expressed by T70 and the 30% melting temperature by T30 in the relationship between the amount of heat in crystal melting and the whole amount of heat in crystal melting each measured by DSC. The other objective biaxially oriented blow-molded container is made from this resin composition.