To obtain a thin-wall molding excellent in a balance between heat resistance and tensile modulus by including a linear polyolefin having a specified or higher degree of crystallinity and a limiting viscosity in a specified range and a cycloolefin resin having a specified or higher glass transition temperature in a specified ratio.
This molding is made from a resin composition containing 60-90 wt.% linear polyolefin (A) having a degree of crystallinity of at least 45% and a limiting viscosity of 1-15 dl/g and comprising 8-40 wt.% ultrahigh- molecular-weight polyolefin having a limiting viscosity of 10-40 dl/g and 60-92 wt.% low or high molecular-weight polyolefin having a limiting viscosity of 0.1-5 dl/g, and 40-10 wt.% cycloolefin resin (B) having a glass transition temperature of 120°C or above and comprising at least one member selected from among a copolymer of ethylene with a cycloolefin represented by formula I or II, a ring-opening polymer of a cycloolefin, etc. In the formulae, R1 to R19, Ra, and Rb are each hydrogen, a halogen or the like; (n) and (v) are each 0 or 1, and the like.
MURAOKA NORIJI
YAMAMOTO YOZO
Next Patent: POLYOLEFIN RESIN COMPOSITION AND MOLDED PRODUCT THEREOF