The knowledge about the zipper
1、If you have a zipper head that can cause a toothless obturator failure when it is unflatted.This ia a paraffin and lubricant coating that can be used on the surface of the zipper tooth and inside
Case zipper explosion-proof property（two）
Such luggage zipper teeth mixed by two rows of chain,relying on the chain tooth bite and closed effect,cross bits is strong,but if the longitudinal stress,two rows of chain zipper teeth up and down easily
Case zipper explosion-proof property（one）
Recently,an online content for “ball pen can be easily torn bags zipper”articles on the internet,and at that time,many people question the zipper bag zipper really so vulnerable,suitcases and bags,guaranteed safe?