| 摘要 |
PROBLEM TO BE SOLVED: To obtain a waterproof sheet having excellent lightness, weather resistance, flexibility, mechanical strength and flame retardancy of self extinguishing property and capable of using for a long time exposed to outdoor. SOLUTION: The waterproof sheet comprises 50-80 wt.% of an olefin based resin having weight average molecular weight of 80,000-600,000 and resin elusion of 40-70, 10-30 and 20-40 wt.% of the whole olefin resin at 0 deg.C, 0-70 deg.C and >70 deg.C respectively by a temperature rising cross fractionation and 50-20 wt.% of talc and/or calcium carbonate. |
