Does polypropylene fiber contain salt?

Polypropylene fibers are salt-free. Because polyethylene fiber is a treated polypropylene monofilament, this material is very safe, non-toxic and harmless, and is a green and environmentally friendly material. Polypropylene fiber is what we usually call polypropylene. Polypropylene fiber is a synthetic fiber that is imitated from propylene. Everyone is still very familiar with polypropylene. It is now commonly used in clothing or decorations. Polypropylene fiber feels very smooth, is also very soft, and has a relatively low density. It is found in some high-end sportswear and T-shirts. The polypropylene fiber used is very comfortable to wear in summer.