(1) Define polypropylene net, including its primary material composition and basic structure. (2) Research the key physical and chemical properties of polypropylene that make it suitable for net applications, such as strength, durability, water resistance, and UV stability. (3) Investigate the common manufacturing processes used to produce polypropylene nets, including extrusion, weaving, and knotting techniques. (4) Identify and categorize the diverse applications of polypropylene nets across various industries,