1, paving waterproofing membrane base layer (screed) must be cleaned, and watering the grass-roots moist guarantee. (Note: roofing screed should be consistent with GB50207-2002 "Roof Engineering Quality Acceptance" provisions of polypropylene producers, underground waterproof leveling layer should be consistent with GB50208-2002 "underground waterproof construction quality acceptance" provisions). Propylene, mainly through the use of halogenated flame retardants and antimony trioxide and other joint action to obtain retardant synergist effect polypropylene, usually the first to add a high concentration of flame retardants and other additives in polypropylene PP Which slice through retardant masterbatch manufacturing polypropylene polyester blend, then sliced ??with conventional polypropylene fibers melt spinning polyethylene resin as the main raw material, add a variety of additives, surface (two-sided) composite nonwoven polypropylene, the calendering process once molded polymer composite web (sheet). Polypropylene specifications | Shouguang Tianxiang waterproof (certified) | PP provided by Shouguang City Tianxiang waterproof material plant. Shouguang City Tianxiang waterproof material plant (www.txfscl.com) Shandong Weifang, waterproof, moisture-proof materials, leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shouguang Tianxiang waterproof leadership with the staff warmly welcome all inquiries negotiations to create a waterproof Shouguang Tianxiang a better future.