For a truly waterproof backpack, in addition to the waterproof function of the fabric, the zipper on the bag must also have a waterproof function. If the zipper is not waterproof, if the backpack is used in a water environment, moisture will still seep in through the gap between the zipper teeth, can not achieve the true sense of waterproof. So, today, Leimande laptop backpack manufacturers will introduce waterproof zippers to you. Let’s get to know them together!

Waterproof zipper is a branch of nylon zipper, which is a nylon zipper that has undergone some special treatment. Commonly used special treatment methods include: sticking PVC film, sticking TPU film, soaking in waterproof agent, coating waterproof zipper and so on.

Waterproof zipper for customized accessories of waterproof backpack

The main material used in the PVC film waterproof zipper is PVC, and the main component is polyvinyl chloride. TPU film is a film made of TPU pellets through a special process. It inherits the excellent physical properties of TPU and has a wide range of applications. Because TPU overcomes many defects of PVC, TPU waterproof zipper is also superior to PVC waterproof zipper in terms of performance. The coating waterproof zipper is characterized by no shedding, no whitening, no employment, low temperature resistance of minus 70 degrees Celsius, environmental protection, softness, and good waterproof performance. Nylon glue-filled waterproof zippers, woven waterproof zippers, and woven airtight waterproof zippers are waterproof. The performance level reaches IPX6X level or above.

In backpack customization, waterproof zippers are mostly used on fully waterproof backpacks, and relatively few applications on splash-proof backpacks. If you want to customize a completely waterproof backpack, you must choose waterproof zippers, otherwise the waterproof effect will not be so ideal.

Waterproof zipper for customized accessories of waterproof backpack

The main factors to consider when choosing a waterproof zipper are: the beauty of the product and the practical effect of waterproofing. Waterproof zippers should be considered from the following aspects:

1. The waterproof zipper film will not tear.

2. Smoothness. It is generally believed that the smoother the zipper is, the better the quality of the zipper is.

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

4. Waterproof effect: The size of the middle seam is directly related to the waterproof effect of the waterproof zipper. If it is too large, it will obviously not achieve the waterproof effect and lose the meaning of the waterproof zipper itself.

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

6. Service life, the quality of the adhesive film on the waterproof zipper is directly related to the service life of the waterproof zipper.