I pp yarn produced with high-strength, anti-friction, anti-aging, anti-acid, ... -corrosion performance The main product 210D-3000D ultrahigh strength polypropylene yarn filament has the characters of acidproof , ageingproof & alkali resistant , shrinking ... in the fields of industrial belt , safety belt , conveying belt , fibre cloth , industrial sewing thread , etc. It is the ideal chemical ...