GAS INJECTED HOLLOW MOLDED OBJECT

摘要

PROBLEM TO BE SOLVED: To provide a gas injected hollow molded object good in gas flowability, having large sink preventing effect and excellent in strength or the like and heat resistance. SOLUTION: A gas injected hollow molded object is composed of a styrenic (co)polymer characterized by that a wt. average mol.wt. is 300000-600000 and a methanol soluble component is 5wt.% or less and a ratio (Mw/Mn) of a wt. average mol.wt. (Mw) and a number average mol.wt. (Mn) is 2.4 or a styrenic resin compsn. containing the styrenic (co)polymer. By injecting gas when the molded object is produced, a cavity part is provided to the interior of the molded object.