The chain teeth of nylon zippers are less rigid
The width of the head width is related to the meshing width of the chain teeth, but when the chain teeth are engaged, it is not the tight fit between the metal parts and the metal pieces.
Zipper slide degree is not the lighter the better
Zipper slide degree is not the lighter the better, the smaller light slippery degrees, zipper slider manufacturer showed the pull head lumen side help to tooth chain you less imposed by extrusion.
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