Waterproof zippers can provide waterproofing when it rains or comes into contact with rainwater. They are also used on seamless products. Waterproof zippers are classified into civilian waterproof zippers, industrial waterproof zippers, water-tight and air-tight zippers. Water tightness and air tightness have relatively high requirements for waterproofing. Waterproof zippers are a type of nylon zipper and are nylon zippers that have undergone special treatment. The special treatments for waterproof zippers include: attaching PVC, attaching TPU film, soaking in waterproof agent, and coating waterproof zippers.

The most widely used type nowadays is the PVC film waterproof zipper. Its main material is PVC, with the main component being polyvinyl chloride. Additionally, other components are added to enhance its heat resistance, toughness, and ductility. The top layer of the surface of this film is paint, the main component in the middle is polyvinyl chloride, and the bottom layer is a back coating adhesive. PVC can be divided into soft PVC and hard PVC. Soft PVC is generally used for flooring, ceilings and the surface layer of leather. However, due to the presence of softeners in soft PVC (which is also the difference between soft PVC and hard PVC), it tends to become brittle and is not easy to preserve, so its application range is not wide. Hard PVC does not contain softeners, so it has good flexibility, **** molding, is not easy to become brittle, is basically non-toxic and pollution-free, and has a long preservation time. Therefore, it has great development and application value and a broad market. There are two reasons why PVC can be widely applied: one is its unique properties (rainproof, fire-resistant, anti-static, and easy to form), and the other is its feature of low investment and high output. PVC waterproof zippers precisely take advantage of the waterproof property of PVC.

Waterproof zippers have a wide range of applications and are suitable for: cold-proof clothing, ski suits, down jackets, sailing suits, diving suits, tents, car and boat covers, raincoats, motorcycle raincoats, waterproof shoes, fire suits, bags, windbreakers, fishing suits and other waterproof related series of products.

Waterproof zippers should be selected from the following aspects:

The waterproof zipper film does not tear. Whether at low temperatures or under repeated water washing, the waterproof membrane is not easy to fall off or tear, which can ensure the waterproof effect for a long time.

The smoothness, to achieve smoothness when in use, also greatly reduces the tensile strength and wear resistance of the waterproof zipper.

The surface of the waterproof zipper film is smooth and fine, with a leather-like smooth feel. This is the appearance of high-quality waterproof zippers.

The color difference of the colored waterproof zipper should be small. The color difference between the zipper fabric strap and the fabric is the color difference. The color difference between the film surface color and the fabric strap surface color should be controlled within 5%.

In addition to color difference, attention should also be paid to the color fastness of the waterproof zipper. Whether the color fastness of the zipper meets the standard grade and whether there will be color transfer between the zipper and the clothing will directly affect the quality of waterproof zipper products.

Waterproof zippers need to be environmentally friendly and meet the OEKO-TEX100 standard.

The waterproof effect: The size of the middle seam directly affects the waterproof performance of the waterproof zipper. If it is too large, it obviously cannot achieve the waterproof effect and loses the original meaning of the waterproof zipper.

The quality of the adhesive film applied to the waterproof zipper directly affects its service life.