PURPOSE: To provide high-glossiness, high impact resistance and excellent stress cracking resistance, by providing a surface layer and inner layer to be obtained by laminating an outer skin layer formed of a specific olefin polymer composition and an inner skin layer formed of a specific olefin polymer composition on the inside of the outer skin layer.
CONSTITUTION: An outer skin layer 12ss is formed of an olefin polymer composition having MRFa of 2-30g/10min. by compounding 20wt.% linear low density polyethylene having density of 0.890-0.925g/cm3, the crystalline melting point of 110-125°C, MRF of (190°C and 2.16kg f) and MRFa of 0.5-20g/10min. with a 80-99wt.% propylene-α-olefin crystalline copolymer having the crystalline melting point of 140-160°C, MRF of (230°C and 2.16kg f) and MRFa of 1-35g/10min. An inner skin layer 12si is formed of an olefin polymer composition having MRFa of 2-30g/10min. by compounding a 10-50wt.% ethylene-α-olefin low crystalline copolymer having contents of α-olefin component of 5-30mols and MRFa of l-40g/10min. with a 90-50wt.% propylene-α-olefin coplymer having the crystalline melting point of 120-180°C and MRFa of 1-35g/10min.
GODA KUNIO
MORIMURA HIROHISA
SASAKI MICHITAKA
