| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for improving productivity at the time of blow molding to obtain a molded object of which the dynamic physical properties originally possessed by a polyolefinic resin are not damaged. SOLUTION: The molded object is manufactured by the blow molding of a mixture containing the polyolefinic resin and polyethylene wax of which the density measured according to a density gradient pipe method of JIS K7112 is 890-980 (kg/m<SP>3</SP>) and the number average molecular weight (Mn) in terms of polyethylene measured by gel permeation chromatography is 500-3,000 and which satisfies the relation represented by the formula (I): B≤0.0075×K, wherein B is a content ratio (wt.%) of a component of which the molecular weight in terms of polyethylene in polyethylene wax in a case measured by gel permeation chromatography is 20,000 or above and K is the melt viscosity (mPa s) of the polyethylene wax at 140°C. COPYRIGHT: (C)2008,JPO&INPIT |
