1, What is the zipper? A: from two to each other for the chain teeth meshing with the flexible and allows it to be repeated opened, pull together to pull the top of the connector component. 2, what is the type of zipper? A: The closed end zipper, one open end, double open end zipper 3, what is closed end zipper? A: when the zipper pull, chain with teeth on both sides can not be completely separated. 4, what is the end of the zipper open? A: when the zipper pull, chain with teeth on both sides can be completely separated. 5, what is flat pull strength? A: Under the specified conditions, imposed on the chain with lateral teeth and the limits of power distribution. 6, what is a strong pull to open flat tail? A: lateral teeth is applied at the open end with a chain to pull the open end of the limits of force damage. 7, what is a strong shift socket? A: The outlet from the teeth to bring the vertical chain pull off the limits of force damage. 8, light slip pull together what degree? A: Under the specified conditions, the process of pulling together the most strong zipper. 9, what is the first pull, pull the film bonding? A: The pull-tab from a vertical support or oppose the direction of pull head pull force limit damage. 10, what is negative Hera times? A: horizontal anti vertical zipper in the regulations under tension, pull the head for pulling back and forth, can bear the number of times. 11, our current implementation of the zipper industry standard name? A: The metal zipper: QB / T 2171-2001 \ plastic zipper: QB / T 2172-2001 \ nylon zipper: QB / T 2173-2001 12, BS 3084 refers to what? A: Standard British zipper. 13, ASTM 2061 refers to what? A: The American Society for Testing and Materials standard zipper. 14, DIN 3419 refers to what? A: The German zipper standards. 15, the metal teeth zipper chain, the main material used in what? A: aluminum, brass, copper-nickel alloy, zinc alloy. 16, the metal zipper teeth chain What are the main surface treatment? A: The yellow-plated aluminum zipper, white-plated brass zippers, nickel-plated black, green bronze, red bronze, silver white, gold-plated and so on. 17, injection molding zipper chain, the main material used in dental What? A: POM. 18, the main raw material of nylon zipper is what? A: polyester monofilament, SMIC thread, polyester textured yarn, thread, and pull the head of the zinc alloy, engineering plastics and so on. 19, the main dye dyed nylon zipper is what? A: disperse dyes. 20, why is banned azo dyes containing not meet environmental protection requirements? A: Some colors contain azo dyes in the ingredients, coloring zipper and human contact would induce certain diseases, it is unsafe. 21, nylon zipper Why are prone to chromatic aberration? A: Because nylon zipper is the main raw materials used in polyester monofilament, SMIC thread, polyester textured yarn, thread and other components of different, different coloring, with a zipper on it is easy to produce color. 22, determine the color based on what? A: The national standard, GB / T 250, GB / T 251. 23, under what environmental conditions to identify color grade? A: In the standard light source color on the color box to identify grade. 24, commonly used international sources are there? A: D65, CWF, TL84 and so on. 25, what is the color fastness? A: After the color fastness of dyed zipper.
