MANUFACTURE OF ROD-SHAPED BODY OF POLYAMIDE HAVING SMALL DIAMETER

摘要: PURPOSE:To achieve high efficiency in manufacturing of a long rod-shaped body having the small diameter by using N-acetyl-epsilon-caprolactam as promoter when lactam is injected into mold together with anion polymer catalyst and promoter, performing polymerization, molded comprising polyamide formed. CONSTITUTION:In beaker made stainless steel, 100 pts.wt. epsilon-caprolactam put, temperature adjusted to 130 deg.C. Sodium hydride 2 0.1 are added mixed. The mixture metal mold, whose 150 used for round-holding molding has 30mm length 1,500mm. body, which taken out after 5 hours, clean cylindrical shape without recess parts around outer surface, there no voids inside.