| http://www.w3.org/ns/prov#value | - BACKGROUND OF THE INVENTION [0002] As a process for improving physical properties such as rigidity and heat resistance of an olefin polymer, there is known a process, which comprises a step of melt-kneading the olefin polymer with an inorganic substance, thereby granulating the inorganic substance into fine particles and dispersing the fine particles in the olefin polymer. [0003] However, the abov
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