35YEARS PROFESSIONAL FACTORY
ZIPPER INDUSTRY LEADER
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Physical properties in the new standard of the metal zipper "requires a total of 14, respectively is flatwise tensile strength, pull close light slip and check strength, under check strength, cotter single pull check strength, cotter flatwise tensile strength, socket shift strength, intubation shift strength, pull head pull film is a combination of strength, pull head pull torsional moment, tensile strength, pull head self-locking strength, load pull, shift single tooth strength of pull head.
In the physical performance test project, three are on the zipper with test, respectively is: flatwise tensile strength, pull close light slip load degree, LA Times. The other 11 are the single test for each zipper parts.
Physical performance index is the focus of the standard, but also to modify the contents of the most, modify the most important place. In the new standard deleted 2 zipper, delete the requirement of the physical properties of aluminum alloy zipper, cotton yarn zipper; modify the flatwise tensile strength, only strong, cotter flatwise tensile strength, socket shift strength, pull head pull tab combined with strength, pull head tensile strength, pull the head strength self-locking, load pull, increases the cotter on unilateral check strength, intubation shift powerful numerical and test methods.
Physical properties of the standard is not suitable for all metal zipper. This is because: with the application of new materials, metal zipper family in the expansion, the scope of application of metal zipper also in the expansion, some special materials made of metal zipper is not suitable for the physical properties of the standard, the need to re formulate. This standard applies only to the general common metal zipper, pull head pull tab for zinc alloy and copper alloy, chain tooth material is made of copper alloy, cloth material for chemical fiber production of metal zipper.