How does the ultrafine denier polypropylene fiber be defined?

Polypropylene market for fine denier, polypropylene ultra-fine denier, micro-Dan has not yet clearly defined. But in China, we usually refer to the fiber fineness at 0.9 dtex-1.4 dtex of polypropylene filament as fine denier polypropylene filament. In the 0.55dtex polypropylene fiber into ultra-fine denier polypropylene fiber. Micro-Dan in the field of clothing is not widely used.
As the fine fiber fiber polypropylene fiber is small, so its own compression and strength will be larger, so the fabric made of this fiber has a good resistance to stress and strength, feel will be very comfortable.

Second, the ultra-fine denier polypropylene fiber is not specifically what kind of fabric, it refers to the fabric fiber compared with the traditional fiber is smaller and smaller, made of ultra-fine denier fabric, feel better and comfortable, looks very Texture, but also to ensure quality, the fiber itself will also increase the price.