The first draft of Polypropylene staple fiber the second draft, heat softening, and the third draft. Polypropylene staple fiber production equipment, including one drafting machine, two drafting machine, heating softening device and three drafting machine, are connected in sequence. The first draft is decomposed into two drafts. Through the principle of dispersion and accumulation, it overcomes the defects of stress concentration and easy breakage, reduces elongation and improves fiber breaking strength.
   
     1. Polypropylene staple fiber has high strength and elastic modulus, which is beneficial to the mechanical properties of concrete.

      2. Polypropylene staple fiber has a strong binding force on the cement surface, and the hydrophilic treatment is good for dusting and improving the strength.

      3. Polypropylene staple fiber has excellent dispersibility, does not clump, and effectively guarantees its anti-cracking performance.

      4. Polypropylene staple fiber has stable chemical properties and strong acid and alkali resistance