| 摘要 |
PROBLEM TO BE SOLVED: To solve defect of creep performance, deficiency of softness and defect of moldability which are defects of conventional uncrosslinked polyethylene. SOLUTION: The uncrosslinked polyethylene resin composition for warm water pipes is composed of (A) an ethylene-based resin and (B) an ethylene-based resin in an amount of 10-50 pts. wt. based on 100 pts. wt. ethylene-based resin (A) and has 0.4-1.5 g/10 min melt index and 925-940 kg/m<SP>3</SP>density, The ethylene-based resin (A) is composed of an ethylene-α-olefin copolymer polymerized by using a metallocene catalyst and having 0.1-0.8 g/10 min melt index and 915-935 kg/m<SP>3</SP>density and 3.0-5.0 molecular weight distribution. The ethylene-based resin (B) is composed of an ethylene polymer having 10-50 g/10 min melt index and≥950 kg/m<SP>3</SP>density. COPYRIGHT: (C)2004,JPO&NCIPI
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