The zipper, in the life of people is to be. Our clothes and pants, bags, hats, shoes and so on with a zipper. So, a good zipper what kind of standard?

1, zipper teeth arranged neatly, no missing teeth and bad teeth;

2, the zipper cloth dyeing should be uniform, no stain, no scars, and soft to the touch; vertical or horizontal direction, cloth to wave gently and evenly or no wave; cloth sticking buckle strap, not easy to break off.

3, every 4000 yards of not less than 40KG, zipper shall not contain fluorescent agents;

4, color fastness to crocking: zipper belt friction resistance test for colour fastness to meet GB251 provisions of grade 3-4; colour fastness to washing: chain after washing color fastness with GB250 provisions of 3-4.

5, feel soft, smooth, flat, very, meshed well teeth: teeth surface to smooth, soft feel when pulling Kai Cheong and less noise and teeth do not allow black and yellow;

6, the same batch of chain chromatism should meet the requirements of GB250 three;

7, according to the quality standard of the European zipper, zipper requirements are non-toxic, do not contain azo, do not contain nickel, does not contain formaldehyde, required to check the needle;

8, according to the national standard, the zipper pull strength is greater than (or equal to) 340N, pulling light slip is less than (or equal to) 5N.