| 摘要 |
PROBLEM TO BE SOLVED: To provide a polishing material having excellent polishing property, wearing resistance and moldability and having a prolonged using life. SOLUTION: This polishing material is produced by comprising (a) a polyethylene having 0.05-3 g/10 min melt index (MFR2 ) at 190 deg.C under 2.16 Kg load and a ratio (MFR10 /MFR2 ) of a melt index MFR10 to the former melt index MFR2 of <=15, (b) a polyethylene having 1.5-3.5 dl/g intrinsic viscosity [η] in a decalin solvent at 135 deg.C and a ratio of (MFR10 /MFR2 ) of the melt index MFR10 to the melt index MFR2 of <=15, (c) a polyethylene having 0.05-3 g/10 min melt index (MFR2 ) and <=8 molecular weight distribution (Mw/Mn) by gel permeation chromatography or (d) a polyethylene having 1.5-3.5 dl/g intrinsic viscosity [η] in a decalin solvent at 135 deg.C and <=8 molecular weight distribution (Mw/Mn) by gel permeation chromatography as principal components to obtain the subject polishing material having excellent polishing property, wearing resistance and moldability and having a prolonged using life. |
