TECHNOLOGY FOCUS - POLYMERS - Preferred Property: The norbornene-type ring-opened-polymer hydride has weight average molecular weight of 50000-200000, in conversion of the standard polystyrene by the gel permeation chromatography. The norbornene-type ring-opened-polymer hydride has molecular weight distribution of 1.5-5.0. EXAMPLE - (In weight parts) 1-hexene (0.55), diisopropyl ether (0.30), triisobutyl aluminum (0.20), isobutyl alcohol (0.075) and cyclohexane (500) were mixed and spin-dehydrated at room temperature under nitrogen atmosphere. Then, 2-norbornene (250) and 1 weight% of tungsten-hexachloride toluene solution (15) was added at 55? oC continuously over 2 hours and ring-opening-polymerization was carried out, to obtain ring-opened polymer. The obtained ring-opened polymer had weight average molecular weight of 83000 and molecular weight distribution of 1.8. The obtained ring-opened polymer was transferred to a pressure resistant hydrogenation reactor. T8400 (RTM: diatomaceous-earth carrying nickel-catalyst) (0.5) was added to the reactor and reacted at 160 degrees C and hydrogen pressure of 4.5 MPa for 6 hours. The solution was filtered and the catalyst was removed. The obtained solution was added to isopropyl alcohol (3000) and a precipitate was filtered. The precipitate was washed using acetone (500), dried at 100 degrees C for 48 hours, to obtain ring-opened polymer hydride (190). The obtained ring-opened polymer hydride had weight average molecular weight of 82200, molecular weight distribution of 2.9, hydrogenation rate of 99.9%, isomerization rate of 5% and melting point of 140 degrees C. The obtained ring-opened polymer hydride (100) was mixed with Irganox 1010 (RTM: tetrakis(methylene-3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate)methane) (0.1), to obtain a pellet. The obtained pellet was extruded using twin-screw extruder at barrel temperature of 190 degrees C and die temperature of 210 degrees C, to obtain tubular molded product. The obtained tubular molded product had excellent oil resistance and impact resistance. The sheet formed using the tubular molded product had excellent water-vapor barrier property and alcohol barrier property.