Stress Simulation Gelbo Flex Testing machine ASTM F392 simulates the resistance against repetitive strain for films, composites and coating films, etc.

Flex failure property is determined by measuring the pinholes formed in the sample structure. Flex durability tester is also called Gelboflex.

Principle

The sample size (200 by 280 mm) is attached to the flex tester mandrels. The flexing action consists of a twisting motion combined with a horizontal motion (compression), thus repeatedly twisting and crushing the film. The test set up gives a twisting motion of 440º in the first 90 mm of the stroke and is followed by a straight horizontal motion of 65 mm. The speed is 45 cycles per minute.

Flex durability tester technical data

Flex Durability Tester​ Features

1. PLC control and 7 inch touch screen operation
2. 5 standard test modes and 4 test stations
3. Long and short stroke fast switching
4. Condition A,B,C,D and E can be chosen
5. Micro printer(Optional)

Standard: ASTM F392, "Flex durability of flexible barrier materials".

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