Waterproof zipper use and how to choose the right zipper

Waterproof zippers can provide waterproofing when it rains or comes into contact with rainwater, and they are also used in seamless products. Waterproof zippers are divided into civilian waterproof zippers, industrial waterproof zippers, and waterproof and airtight zippers. The requirements for waterproofing are relatively high for water tightness and air tightness. Waterproof zipper is a type of nylon zipper that has undergone special treatment. The special treatment for waterproof zippers includes: pasting PVC, pasting TPU film, soaking with waterproof agent, and coating waterproof zippers.

The most widely used nowadays is PVC film waterproof zipper, which uses PVC as the main material and is mainly composed of polyvinyl chloride. In addition, other components are added to enhance its heat resistance, toughness, and ductility. The top layer of this film is paint, the main component in the middle is polyvinyl chloride, and the bottom layer is back coated with adhesive. PVC can be divided into soft PVC and hard PVC. Soft PVC is generally used for the surface of floors, ceilings, and leather, but due to the presence of softeners in soft PVC (which is also the difference between soft PVC and hard PVC), it is prone to becoming brittle and difficult to store, so its use is not widespread. Hard PVC does not contain softeners, so it has good flexibility, good molding, is not easily brittle, is basically non-toxic and pollution-free, and has a long storage time. Therefore, it has great development and application value and a broad market. There are two reasons why PVC can be widely used: firstly, the unique properties of PVC (rain resistance, fire resistance, anti-static, easy molding), and secondly, the low input and high output characteristics of PVC. PVC waterproof zippers utilize the waterproof properties of PVC.

Waterproof zippers are widely used and suitable for waterproof related products such as cold coats, ski jackets, down jackets, sailing suits, diving suits, tents, vehicle and vessel covers, raincoats, motorcycle raincoats, waterproof shoes, firefighting suits, luggage, assault suits, fishing suits, etc.

Waterproof zippers should be selected from the following aspects:

The waterproof zipper film does not tear. Whether at low temperatures or repeatedly washed with water, the waterproof film is not easily detached or torn, so as to ensure long-lasting waterproof effect.

Smooth degree, to achieve smoothness in use, greatly reduces the pull resistance and wear resistance of waterproof zippers.

The surface of the waterproof zipper film is flat and delicate, with a smooth feeling similar to leather, which is the appearance of high-quality waterproof zippers.

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

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

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

Waterproof effect, the size of the middle seam directly affects the waterproof effect of the waterproof zipper. If it is too large, it obviously cannot achieve the waterproof effect and loses the meaning of the waterproof zipper itself.

The service life of the waterproof zipper is directly related to the quality of the adhesive film attached to it.