| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a mold having excellent durability for fabricating plastic and a metal. SOLUTION: A targeted product portion is manufactured by shaping a raw material for cutting fabrication by high speed cutting or a casting reversal method, the raw material being made of a polymer molded item mainly composed of a cast polyamide resin obtained by ring-opening polymerization of anω-lactam-based monomer using anionic polymerization and having a high degree of crystallinity. COPYRIGHT: (C)2005,JPO&NCIPI |
