Patent ID: 8232339

Claim:
A process for producing a molded fibrous basic magnesium sulfate filler-containing olefin polymer composition product which comprises the steps of: preparing a fibrous basic magnesium sulfate filler-containing master batch composition which comprises the following components: (A) an olefin polymer, (B) a fibrous basic magnesium sulfate filler, (C) an elastomer, (D) a lubricant selected from the group consisting of a hydrocarbon, a halogenated hydrocarbon, a fatty acid amide, an alkylene(bisfatty acid amide), a fatty acid ester, a monoalcohol having 16 or more carbon atoms, a polyhydric alcohol, and a fatty acid salt of magnesium or a metal having an ionization tendency lower than that of magnesium, and (E) a filler-surface treating agent selected from the group consisting of a fatty acid, an oxyfatty acid, a phosphate of an aliphatic alcohol, and a coupling agent; mixing 100 weight parts of the fibrous basic magnesium sulfate-containing master batch composition and 100 to 2,000 weight parts of a diluent resin containing a propylene polymer, to give a mixture; kneading the resulting mixture in a molten state, to give a molten mixture; and molding the molten mixture to give the molded product.