... (commonly known as:polypropylene yarn, high-strength polypropylene) 350D-3500D coloredhigh-strength polypropylene yarn, because of their large ... woven bags, etc. area, is analternative polyester, nylon, Polyethylene new ideal fiber material,the special requirements of ... behalf of clients processing all kinds of high-strength polypropylene filament Sewing line , mainly used in harness,ropes, ...