Methods To Evaluate Zipper

Slide Fasteners Reciprocating Tester is used to determine the durability of reciprocating motions for  fabric zippers which contain metal or plastic teethunder the lateral and longitudinal strength. The specimen is pulled down and up for a specified time under a lateral and vertical tension.This machine is designed reasonably and easy to operate.The tester is done by the puller of slide fastener reciprocating at a unchanged speed as 30times per minute till reach the specified times.

 

 

There are various methods to evaluate Zipper & Slider quality. The procedures in various quality standards worldwide are more or less similar and are documented well under ASTM, ISO, BIS, JIS, DIN, ISI and other well known International Standards.Zipper & Slider strengths are checked as a routine inspection, For this the method laid out in JIS-S3015 is used. The same standard is used by the YKK also, the world's leading Zipper manufacturer.The basic strength can be determined based on the following inspection methods, from which all round strength appropriate for respective uses can be judged.To determine the Zipper Strength the Zipper Chain in closed position is clamped in-between specially designed Jaws of 25 mm width and pulled at a fixed speed at 90 degree angle to the chain interlocked direction.The resistance is measured in Kgf till failure.