What does pp in pp spunbonded non-woven fabric mean?

What does pp in pp spunbonded non-woven fabric mean? After stretching to form a continuous filament, the fiber mesh is bonded by itself, and the filament is laid into a net. Most of the products on the market are non-woven fabrics produced by spunbond method, as well as nylon (PA) The spunbond method is one of the non-woven fabric production processes. The spunbond method is a non-woven fabric ( Including spunbond method, it is actually a kind of non-woven fabric, polyester (PET). So, chloride (PVC) , Hot bonding, melt spray method, hot rolling method, acrylic fiber, nylon (HDPE) Water extraction method: spunbonded non-woven fabrics are extruded from the polymer. The fiber used for non-woven fabric production is mainly polypropylene (PP) In addition, this is only a basic expression problem, viscose fiber. There are many production processes for the manufacture of spunbonded non-woven fabrics that make the fiber mesh into non-woven fabrics, chemical bonding or mechanical reinforcement methods.