| 摘要 |
The present invention relates to a roofing sheet with excellent form stability. More specifically, provided is a roofing sheet with excellent form stability which comprises an asphalt impregnated layer containing glass fiber; an improved asphalt layer; and a silica layer, wherein the improved asphalt layer is formed at upper and lower surfaces of asphalt impregnated layer containing glass fiber, the silica layer is formed at the uppermost layer and the lowermost layer by contacting the improved asphalt layer, the asphalt impregnated layer containing glass fiber is formed by straight asphalt impregnated in a structure including glass fiber and regenerative cotton, and the improved asphalt layer contains 65-70 wt% of asphalt; 8-10 wt% of thermoplastic synthetic rubber; 0.5-3 wt% of hydrocarbon oil as process oil; and 20-25 wt% of calcium carbonate. |
