| 摘要 |
Disclosed is a process of manufacturing a roofing membrane that is free of any organic mat. The process includes selecting a lightweight polyester fabric including an open grid of over-under construction in which fill yarns are held between pairs of machine direction yarns lying essentially one above the other, the fabric including polyester yarns having about 30 to about 300 denier yarns in the machine direction, about 30 to about 300 denier yarns in the fill direction, a yarn per inch count of about 3x3 to about 10x10, and a dry weight pick-up of about 60 to about 250 parts by weight of binder relative to 100 parts by weight of polyester in the fabric; selecting a high strength reinforcing open grid; and passing the lightweight polyester open fabric, the high strength reinforcing open grid and any additional reinforcements free of any organic mat through bituminous material to form the roofing membrane.
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