Coated webbing for waterproof zipper

If you look around and notice carefully, you will find that coated webbing is widely used in our daily life. For instance, the straps of backpacks, the leash of pets and the men’s belts are all can be made from coated webbing. With the improvement of people’s living standard, people try to spend more time outside home. Some activities such as fishing, hiking and skiing are popular to public. However, people asks for more waterproof outfits for outdoor activities to deal with the moisture rainy circumstance. Waterproof bag is one of the important outfit. Waterproof webbing and waterproof fabric are not hard to find now. But the zippers usually become the bug to make the bag leak water in. So some waterproof bag manufacturers or designers choose coated webbing to make waterproof zippers to solve the problem.

Nowadays, there are two types of waterproof zippers in the market. The one is spill-resistant zippers and the other one is the real waterproof zipper. What’s the difference between these two zippers? The most obvious difference is the structure.

The spill-resistant zipper is one-side waterproof. It is the combination of PU film, nylon braided webbing and zipper teeth. Zipper is the flat tape. When sewed on bags, one side of zipper facing the outside of bags and the other side facing the inside. The spill-resistant zipper has PU film on the side that facing outside while keep the nylon material on the side of inside. Therefore, if just only some few water spill on a bag, the spill-resistant zipper can help to resist the water. But if the bag is suffering the heavy rain or continuous moisture, the water will leak into the bag through spill-resistant zipper.

On contrast, the real waterproof zipper can resist water from 360 degree. It is generally made from TPU coated webbing besides the zipper teeth. To guarantee the function and make it easy to use, TPU coated webbing for zipper should be in thickness of 0.9 mm to 1 mm. The webbing can be matte or glossy. Which surface to be chosen is up to the design of bags. With TPU coated webbing zipper, the waterproof bag will be better able to resist heavy rain.