I. Basic test methods for measuring zipper strength by reciprocating zipper pull tester:(1) Test of Zipper Pulling StrengthFlat pull strength is the most basic indicator of strength, which is used to test the ability of zipper teeth to resist lateral force under interlocking state, which is very similar to the actual state of use.

There are many commonly used washing methods for zippers. General washing is to use a water temperature of about 60~90℃ and add a certain amount of detergent for 15 minutes;