The zipper, the greatest invention of the 21st century, is now easy to ignore its importance, because it has become too common accessories, but the quality of its purchase can not be ignored. A piece of clothing may have a significant impact because of the quality of a zipper. Its quality standards are introduced as follows:
How to choose a good quality high-end zipper
1. according to the European zipper quality standard, handbag zipper requirements non-toxic, no azo, no nickel, no formaldehyde, the inspection needle is required, when ordering to be put forward separately.
2. If the zipper color is white (Swell color no. J-D030), feel soft, smooth, flat, stiff and well meshing, teeth: the surface of zipper head teeth should be smooth with good quality, feel soft and smooth when it is pulled, and the noise is less, and teeth should not be black or yellow.
3. high-end zipper cloth belt dyeing should be uniform, no stain, no scar, and feel soft; Vertical or horizontal direction, the cloth should be slightly uniform wave or no wave; Stick the cloth close to the cloth belt, not easy to break off.
4. Color fastness to friction: The color fastness of the zipper belt shall meet the requirements of GB251 after the friction test. Colour fastness to washing: the colour fastness of chain belt after washing is in line with grade 3-4 stipulated by GB250.
5. zipper chain teeth neatly arranged, no missing teeth, bad teeth;
6. each 4000 yards of weight should not be less than 40KG, zipper cloth belt should not contain fluorescent agent.
7. The color difference of the chain belt in the same batch shall reach the level 3 stipulated in GB250.
8. according to the national standard, zipper pulling strength ≥340N; Pull and close smoothly ≤5N.
Post time: Jan-21-2022