Brief Introduction of Digital Tearing Tester

The standard mannual Elemendorf Tearing Tester consists of a frame and pedestal, mounted on a rigid base, carrying a pendulum and pointer assembly. There are two clamps to hold the test sample, a fixed one on the pedestal part of the instrument and one on the pendulum. The dimensions of the clamping surfaces are at least 25 mm wide and 15 mm deep.

The pedestal is fitted with a low friction bearing having a horizontal axis upon which the pendulum is allowed to swing. The pointer fits on the same axial spindle as the pendulum, its friction is enough to stop it at the highest point reached by the pendulum when it swings. The pointer stop is adjustable to allow the instrument zero to be set. The base of the instrument is fitted with the pendulum release and pointer stop mechanisms. The pendulum is held in the initial position and the test is started by the release mechanism. The release mechanism is designed to let the pendulum swing freely without imparting any shock or throw to the pendulum as it is released. A built in knife assembly allows the operator to produce the initial cut. It is adjusted so that the sample tearing length, after the initial cut is 43.0 mm ±0.5 mm. Interchangeable pendulums cover the range 8000 to 64000 calibrated in millinewtons (mN).

Digital tear testers have similar geometry to the manual versions but have an electronic rotary transducer to measure the pendulum swing instead of a friction pointer. Calculation of calibration, calculation and data functions are processed electronically. The instruments digital display presents test information including results, number of plies torn, number of tests made, maximum and minimum values and standard deviation etc. The instruments are sometimes fitted with automatic sensing of the pendulum type in use. Interchangeable pendulums are available giving a range of 2000 to 32000 mN. Pneumatic clamping and automated cut and test procedure help overcome possible operator influence.

For more information about our testing instrument, please contact

·website:http://www.qinsun-lab.com/

· Phone :+86-21-6780 0179

· E-mail :info@qinsun-lab.com

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