How to Choose Waterproof Zipper

The zipper is generally divided into: nylon zipper, metal zipper, resin zipper. On this basis, the waterproof zipper was produced.

The waterproof zipper is a branch of the 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. Today we mainly introduce their differences.

The difference between PVC and TPU waterproof zippers

The main material used for the waterproof zipper with PVC film 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 characteristics of the coated waterproof zipper are that it does not fall off, does not turn white, does not embrittle, is resistant to low temperatures of minus 70 degrees Celsius, is environmentally friendly, soft and has good water resistance.

In addition, how to choose a waterproof zipper?

✔️Appearance quality

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.

✔️Waterproof zipper film does not tear

Whether it is in the case of low temperature or repeated washing, the waterproof membrane is not easy to fall off or tear, to ensure the waterproof effect for a long time.

✔️Smoothness 

It is generally believed that the better the smoothness of the zipper, the better the quality of the waterproof zipper. In fact, this is not the case. The smoothness of the waterproof zipper has certain index requirements. All products that meet this index requirement are high-quality products. Of course, it is not excluded that some manufacturers are to save costs. , so that the material of the code tape itself is reduced, and it seems to be smooth to use, but it also greatly reduces the pull resistance and wear resistance of the waterproof zipper.

✔️The color difference should be small

The difference between the color of the zipper tape and the fabric is the color difference. The color difference between the film surface and the tape surface is controlled by 5%.

✔️Waterproof zipper color fastness

Whether the color fastness of the zipper reaches the standard level and whether there will be color shifts between the zipper and the clothing will directly affect the quality of the waterproof zipper product.

1. Color fastness mainly includes the product's resistance to washing and friction, and generally refers to the degree of fading of dyed fabrics under the action of external factors (extrusion, friction, soaping, rain, exposure, etc.) during use or processing.

2. Sunlight fastness: Sweat stains are all accompanied by sun exposure. Therefore, the light fastness is not single, it includes the double fastness to the sun and perspiration. When choosing some zipper products, you should choose those waterproof zippers that have been treated with anti-ultraviolet rays or directly with high light fastness.

3. Soaping fastness: The quality of soaping fastness depends on two aspects: one is the force between the dye itself and the fiber molecules. If the force is large, it is difficult for the dye molecules to be soaped out of the fiber surface; two It is the finishing process after dyeing, the residual amount of dye molecules on the surface of the fiber, if the subsequent treatment is more thorough, the residual amount of dye on the surface will be very small, and it is difficult to make the waterproof zipper tape fade with soaping.

In the ordinary washing process of clothes, high temperature water and excessive detergent should not be used for waterproof zippers. Generally, the temperature should not be too high. Neutral and weakly alkaline detergents are best, and the time should not exceed 30 minutes. It is important to choose some products with higher soaping fastness as far as possible when choosing zipper products.

✔️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 not have the waterproof effect and lose the meaning of the waterproof zipper itself.

✔️Service life

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

The bottom line

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