Zippers varying in specifications and types require different strengths suitable for different purposes.
The methods of testing zipper strength are not limited, but the basic strength is usually determined by following inspection methods.
1. Flat pull strong test
The flat tensile strength is the most basic strength indicator. It is used to test the ability of the zipper teeth to resist the lateral force in the interlocked state, which is very similar to the actual state of use.
2. Top stop holding strength
The zipper chain teeth are interlocked, and the slider is pulled to the upper end stop, and the pull head is pulled. At this time, the strength of the top stop of the zipper can be measured. This is a simulation of the zipper in the holding state, the slider crosses the top stop and pulls off. The ability of the top stop to resist external forces when moving from the ribs.
3. Bottom stop Holding Strength
Pull down the slider to the bottom stop and fix the two sides of zipper by gripper. Measure bottom stop holding strength and resistance of the internal components of the slider.
4. Open tail flat pull strong test
Test the resistance of the open-end zipper insert tube and socket against external force damage. Fix the left and right sides of the open end with the upper and lower clamps. When the zipper is closed, start the machine.
5. Strong test of slider lock
The slider is self-locking in the middle of the connecting teeth. The zipper teeth are divided into left and right parts. Stretching the left and right parts of the zipper can test the locking strength and resistance of the internal components of the slider.
6.Crosswise Strength of Separating Unit
The zipper is locked and the two sides of zipper separating unit are fixed by the tester gripper. Stretch the two sides of zipper separating unit to test its resistance to external force damage
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