Resin material, and hollow formation item and the formation manner null for gas assist injection molding

摘要

PURPOSE: To provide a resin material for a polyacetal resin gas-assisted injection molding which has excellent surface external appearance and small irregular thickness. ;CONSTITUTION: A resin material for gas-assisted injection molding contains a polyacetal resin as a main ingredient, and has a dynamic viscosity rate η' at 190°C of 5×10³ to 3×10⁴P (angular velocity of 10rad/sec) and dynamic elastic modulus G' of 1×10² to 1×10⁵dyn/cm² (angular velocity of 0.1rad/sec).;COPYRIGHT: (C)1996,JPO