Flexible polypropylene roofing membrane

摘要

A thermoplastic polyolefin (TPO) roofing membrane is made by blending a new polypropylene based elastomer (PBE) or plastomer (PBP) and polyolefin copolymers. The new PBE or PBP offers superior flexibility over conventional polypropylene roofing membranes for easy installation. The new narrow molecular weight distribution and broad crystallinity distribution of the PBE or PBP results in excellent heat welding strength and wide heat welding windows of the said TPO membrane.