For Crack Resistance Polypropylene bundle wave fiber, also known as polypropylene threaded fiber, is made of polypropylene through special parallel drawing and wave forming process and surface treatment. It has the advantages of high cracking strength, good dispersion in concrete, and strong gripping force, and is used for crack resistance enhancement of cement concrete. SFT-WavePPFiber is made of synthetic resin as raw material and processed through special process and surface treatment. Also, it is high alkaline resistant. Compared to steel fiber, its characteristics are: corrosion resistance, easy dispersion, easy construction and no damage to mixing equipment