How are waterproof zippers made? TPU film is a film made from TPU granules through a special process. It inherits the excellent physical properties of TPU and has an extremely wide range of applications. Because TPU overcomes many of the defects of PVC, TPU Waterproof Zippers are also superior to PVC Waterproof Zippers in terms of performance. The characteristics of coated Waterproof Zippers are no shedding, no whitening, no brittleness, low temperature resistance -70 degrees Celsius, environmental protection, softness and good waterproofness, among which nylon glued Waterproof Zippers, woven Waterproof Zippers and woven airtight Waterproof Zippers have a waterproof performance level of IPX6X or above. The main purpose of Waterproof Zippers is to provide waterproof function in case of rain. Waterproof Zippers are widely used in a wide range of applications, such as: cold-proof clothing, skiing suits, down jackets, nautical suits, diving suits, tents, car…