PP lids-short for polypropylene lids-are common plastic products found in everyday life. They act like low-profile "eco-guardians," quietly appearing on items such as water cups and food packaging.

PP itself is a thermoplastic resin produced through the polymerization of propylene; it is characterized by chemical corrosion resistance, good heat resistance, and excellent mechanical properties. Importantly, no harmful substances are added during the production process, ensuring its eco-friendliness right from the source.