| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of molding a resin molded product that uses crystalline polymer resin and can easily and securely achieve a method of improving crystallinity of the resin. <P>SOLUTION: In a molding die 11, by applying torsion force to crystalline polymer resin materials A'2, A'3 whose temperature is the melting point or lower and the crystallization temperature or higher, the resin materials A'2, A'3 are extended at a strain rate equal to or exceeding a critical extension strain rate, and are molded to undergo crystallization following an oriented melting state. At this time, it is preferable to apply, together with the torsion force, at least one of tensile force or compressive force along a direction approximately parallel with a rotating axis of the torsion force. <P>COPYRIGHT: (C)2013,JPO&INPIT |
