I often hear customers say that custom-made backpacks should be waterproof, emphasizing the use of PVC bottom materials, and then the need for waterproof zippers. We all know that the fabric of pure PVC bottom is waterproof without stitching or cutting, but backpacks are all waterproof. It needs to be sewn. Even if the fabric is waterproof, water will enter the sewn interface. There will be a little bit more or less. As the saying goes, there is no impermeable wall, not to mention backpacks with zippers?
Today our theme is whether waterproof zipper is waterproof or not. Ordinary zippers on the market are not waterproof. The biggest non-waterproof is the cloth on both sides. Because it is woven, it will leak water, including the zipper teeth. The difference between the waterproof zipper we often say and the ordinary zipper is that there is a layer of PVC coating on the cloth. When the zipper is closed, it can cover the zipper teeth and play a certain waterproof effect, but there is still a gap in the middle. Completely closed.
Speaking of this, many people may ask, but they haven’t mentioned the main point. So, is the waterproof zipper waterproof? Let’s put it this way, compared with ordinary zippers, waterproof zippers are definitely more waterproof. Here we are talking about water repellent or instantaneous water. If you put your backpack in a bucket to soak it, it’s definitely not waterproof. . It can only be said that the waterproof zipper enhances the waterproof function of the backpack.