PIPING MEMBER FORMED BY USING PROPYLENE RESIN COMPOSITION

摘要

Disclosed is a piping member formed by using a propylene resin composition having a melt flow rate after kneading of 0.01-2.00 g/10 minutes. The propylene resin composition essentially contains (A) 100 parts by mass of a propylene-ethylene random copolymer having an ethylene content of 2-5%, a crystallization temperature of 86-105°C, a melt flow rate of 0.01-2.00 g/10 minutes, and a molecular weight distribution of 3-8, and (B) 1-15 parts by mass of a styrene-butadiene rubber having a styrene content of 10-40% and a weight average molecular weight of not less than 200,000. This propylene resin composition is characterized by further containing (C) 0.1-1.0 part by mass of a hindered amine light stabilizer having a weight average molecular weight of not less than 2,000 per 100 parts by mass of the propylene-ethylene random copolymer. Also disclosed is a piping member formed by using such a propylene resin composition which is characterized in that the styrene-butadiene rubber is composed of a hydrogenated styrene-butadiene copolymer rubber.