Is it possible to achieve mass production of fine denier polypropylene staple fiber?

When the fineness of polypropylene staple fiber is less than 1.11 dtex, the waxy texture of synthetic fibers is completely eliminated. Its appearance and feel are not only the same as those of high-quality combed cotton, but also have a better wicking effect than cotton. One of the ideal replacements of cotton fiber supply and demand contradiction. Polypropylene is a cheap fiber, plus its light weight (see the table below), materials of equal weight can produce more fabrics, which is beneficial to reducing costs.

Specific gravity of several fibers: polypropylene 0.91 ～ 0.92 nylon 1.14 cotton 1.50 ～ 1.55 polyester 1.38 ～ 1.39 viscose 1.52 fiber 1.14 ～ 1.17 wool 1.30 ～ 1.32 glass fiber 2.54 polypropylene has good chemical resistance It has almost no effect on polypropylene, and its strength is hardly reduced in 50% NaOH solution or 28% ammonia water. Under the action of strong oxidants, the strength of polypropylene is almost unchanged. Polypropylene fibers are also resistant to insects and mold. Performance, and extremely low moisture regain, staining and pollution are also low, as well as low static electricity and easy to wash, etc., is a cheap and good raw material, but because of the polypropylene fiber manufacturing fineness has remained in the coarse denier for many years Level, its application is greatly restricted. For many years, the manufacture of fine-denier polypropylene staple fibers has remained in the laboratory stage, and large-scale industrial production has not been formed. The main reason is that a reasonable large-scale industrial superior manufacturing process has not been designed.

It is believed that with the deepening of research, large-scale industrial production of fine-denier polypropylene staple fiber is just around the corner, and the polypropylene industry will also go out of the circle to increase its popularity and application scope.