Roll Zipper

Highly curved:

If high-tension zipping is required (tighten the middle zipper on both sides). Increase the safety factor during design and avoid using reverse zippers.

High combined tension:

Physical changes in batch-produced zippers are inconsistent. It is recommended that the two sides be used with each other as much as possible to avoid bending the zipper and causing the zipper to be of different lengths. Injection-molded zippers are molded and then put together, so there is no such restriction, and can be used together.

Mutual fight requirements:

The chain elements of nylon zippers are formed on both sides at the same time. After sewing, dyeing, and drying, the manufacturing process environment on both sides of the zipper is the same, and the physical changes in production are consistent. The physical changes of zippers produced in different batches are inconsistent. It is recommended that the two sides be used with each other as much as possible to avoid bending the zipper and causing the zipper to be of different lengths. Injection-molded zippers are molded and then put together, so there is no such restriction, and can be used together.

Three-dimensional use:

The so-called three-dimensional use means that the chain cloth and the sprocket teeth are not on the same plane before and after the zipper is assembled. Nylon zippers can be used for formal three-dimensional use, but reverse installation is not suitable. The sprocket teeth of the injection molded zipper are attached to the cloth belt separately, unlike the nylon zipper that has traction when molded. It is easy to produce stuck teeth, uneven pulling, and even tooth loss when pulling hard. Therefore, injection-molded zippers cannot function three-dimensionally. Over-tight use: When the zipper is sewn too close to the slider, causing friction on the slider, it may easily lead to uneven pulling. Especially when there are hard materials on both sides, the friction force is large and the relative drag force is large, which can easily cause the slider or pull tab to rub and peel off the paint. This situation can be improved by using a wide zipper.