... anti-aging, anti-UV polypropylene yarn, High-strength polypropylene filament, polypropylene filament,polypropylene filament anti-aging ... commonly known as:polypropylene yarn, high-strength polypropylene) 350D-3500D coloredhigh-strength polypropylene yarn, because of their large ... , resistance to seawater corrosion, does not absorbmoisture, breaking strength (strong) 7.8g / d, up to 10g ...