Plastic bottle screw caps are used extensively in various industries such as food, beverage, pharmaceuticals, chemicals, and household products. These caps are made of polypropylene or PP, which is a thermoplastic polymer that is known for its high strength, durability, and resistance to chemical substances and heat. The use of PP for screw caps ensures that they can stand up to a variety of temperature and pressure conditions without compromising the tightness of the seal. One of the most wonderful aspects of plastic bottle screw caps is their robust sealing capability. The screw thread design of these caps ensures that they can be tightly secured on the bottle neck, stopping any leakages or spills. The threads on the bottle neck and the cap are exactly engineered to create a ideal fit, making sure that the cap stays securely locked onto the bottle. This robust sealing helps to hold the contents of the bottle clean and intact, defending them from exterior contamination.