Tensile testing of the zipper vs Leather Tear Strength

Tensile testing of the zipper


Gester Instruments's self-developed and produced UTM wholesale Universal Testing Machine are widely used, mainly for footwear, leather, clothing, textiles, rubber and other materials. Tensile, tearing, peeling, compression, bending, anti-shearing, three points Various physical properties such as bending resistance.


The Universal Tensile Testing Machine is used to detect the flat pull strength of the zipper, which can be divided into several major steps:


Firstly.the purpose of the test: to detect the flat pull strength of the zipper.


Secondly.the test range: This test method is applicable to all types of zippers.


Thirdly.the test steps:


1. The sample is parked in the laboratory environment for more than 8 hours.


2. Intercept three zippers with a length of ≥75mm.


3. Start the power of the tension machine and set the speed to 300mm/min. The sample device is placed between the upper and lower clamps, and the device should be aligned with the pinch portion of the fastener element and the clamp.


4. Start the tensile test button. Start the test and test until the tooth is removed or the tape is broken. Record the maximum tensile force during the test.


5. Test each sample at least 3 times and take the average as the final result.


Fouthly.the tensile testing equipment test flat tension test notes:


1. If all three values are acceptable, the average of the three values is used as the final result.


2. If one of the three values is unqualified, it is necessary to revise two samples for re-inspection. If there is any unqualified in the re-inspection, it is judged as unqualified, and the unqualified value of the initial inspection and the re-examination is The average is taken as the final result. If the retest does not fail, all pass numbers are used as the final result.


3. If two or more of the three values are unqualified, it is judged as unqualified, and the average value of the unqualified values is taken as the final result.


Testing of Leather Tear Strength By Tensile Testing Machine


Leather tear strength tester is suitable for testing tear strength of all kinds of dermis and synthetic leather materials. It is used to test tear strength of dermis and synthetic leather under external force.


Leather Universal Testing Machine Test steps: 


1. Samples were parked in laboratory environment for more than 8 hours.


2. Cutting 3 or more samples with a cutter at least 150 mm above the material edge in the longitudinal and latitudinal directions of the sample, respectively.


3. The two ends of the sample are respectively clamped on the upper and lower fixtures of the tensile tester，attention should be paid when clamping：To make the sample expose the part of the upper fixture and the part of the lower fixture, keep the same. To keep the clamped sample in a vertical state, do not tilt to one side，set the speed of the tensile tester to 200 mm/min.


4. Start the test key of the tensile tester and start the test. When the tension machine tears the sample completely, record the maximum tension value of the tension machine.


5. Each sample is tested at least three times, and the average is taken as the final result.


Leather Tear Strength


Result judgement:


1. If all of the three values are qualified, the average of the three values is taken as the final result.


2. If one of the three values is unqualified, two more samples should be cut for reexamination. If there is no more unqualified in reexamination, it will be judged as unqualified, and the final result will be the average of the unqualified values of the initial and reexamination. If there is no nonconformity in the reexamination, the final result is the average of all values.


3. If two or more of the three values are unqualified, they are judged to be unqualified and the average of the unqualified values is taken as the final result.


Gester Instruments specializes in producing all types of Universal Testing Machine,including:Dual Column Universal Testing Machine,Single Column Tensile Strength Tester.Contact us for your needs.

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