The full name of pp is polypropylene, and the Chinese name is polypropylene. Nw is the abbreviation of nonwoven, which is non-woven or non-woven. It is a non-woven fabric formed by airflow or mechanical mesh, then hydroentangling, needling, or hot rolling reinforcement and finally finishing. ppnw means nonwovens made of pp fibers. Due to the nature of the PP itself, the fabric finally exhibits high strength but poor hydrophilic properties. Usually ppnw process is spinning into a mesh, hot rolling reinforcement. General ppnw uses a wide range of packaging bags, surgical protective clothing, industrial cloth, etc.

PE is polyethylene, the same understanding.