What is a zipper tester, and what is its purpose?

A zipper tester is a device that measures the durability and performance of zippers under different conditions. A zipper tester can simulate the repeated opening and closing of zippers, as well as the lateral and longitudinal forces applied to them. A zipper tester can help evaluate the quality and reliability of zippers for various applications, such as clothing, luggage, tents, etc.

A zipper tester typically consists of a clamping system, a reciprocating mechanism, a tension system, a counter and a control panel. The clamping system holds the two sides of the zipper firmly and allows for adjustment of the distance between them. The reciprocating mechanism moves the zipper slider back and forth along the zipper at a constant speed and stroke. The tension system applies a specified load to the zipper in both horizontal and vertical directions. The counter records the number of cycles completed by the zipper slider. The control panel enables the user to set the test parameters and monitor the test process.

A zipper tester can perform various tests according to different standards and specifications, such as SATRA TM50, CNS 1083, BS 3084, DIN 3419-1, DIN EN16732 and QB/T 2171. These tests can measure the resistance to reciprocation, strength, slippage, twist, crosswise strength and top stop holding of zippers. A zipper tester can also detect any defects or damages on the zippers during the test and stop automatically if necessary.