The zipper is composed of cloth tape, microphone teeth, slider and limit code. Each part has corresponding requirements. For example, since the raw material of the invisible waterproof zipper tape is composed of different types of threads such as polyester thread, suture thread, and central thread, its weight and coloring are different, so on the same invisible waterproof zipper It is easy to produce chromatic aberration. At this time, when selecting the cloth tape, the dyeing should be uniform and there is no cloudy point. The cloth tapes made of different fabrics are mainly soft to the touch.
The microphone teeth of the closed end waterproof zipper are also electroplated and colored, so when purchasing, you must pay attention to whether the surface is evenly plated, whether there is any color pattern, and whether the zipper is smoothly pulled up and down. After the waterproof zipper is closed, it is necessary to observe whether the left and right teeth are engaged with each other. Asymmetric zipper teeth will definitely affect the use of the zipper.
The upper and lower stops of the limit code must be tightly fastened to the microphone teeth or clamped on the microphone teeth, and must be strong and perfect. There are many shapes of zipper pullers, and the finished product can be small and delicate, or rough and majestic. But no matter what kind of slider, it is necessary to feel whether the slider can be pulled freely, and whether the zipper cannot be pulled or closed. Now the China waterproof zipper heads on the market are equipped with self-locking devices, so after zipping the zipper, it is necessary to check whether the zipper will slide down after the lower lock head is fixed.
As a special functional product, the waterproof zipper should not only meet the above basic requirements, but also clearly state that its color fastness must meet the conditions. Generally, it is required that the zipper is immersed in hot water of 80°C for 15 minutes, and the comparison with the original is greater than grade 4. ; The shrinkage rate of the zipper is not more than 3% in water washing, and the shrinkage rate in dry cleaning is not more than 3%.
Immerse the invisible waterproof zipper in an ethylene dilute solution with a temperature of 20+/-2 degrees Celsius for 2H, let it dry naturally, and the opening and closing of the zipper will keep the original function. After 180min in 3% sodium chloride solution, take it out to dry naturally, and visually check whether the zipper has rust spots; it does not contain toxic or harmful substances.
Post time: Jul-15-2022