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Information about tests

Gelboflextest/Brugger KFT

Wrinkle test in which a piece of film of approx. DIN A 4 size is cylindrically wrung up at an angle of max. 440 ° in the Brugger KFT tester. Usually 100 cycles are performed, afterwards the sample is tested e. g. on hole formation, delamination, oxygen or water vapour transmission rate, optical density or the like. The base price includes the examination of max. 4 sheets over 100 cycles at an angle of max. 440 °. Other test conditions are available upon request, calculation according to time spent. Minimum sample size 280 mm x 200 mm.

test method:Mechanical/ technological properties
Norms: ASTM F 392/ F 392M (reapproved 2021)
Needed sample size:4 x DIN A 4 for standard tests, or according to the requested number of specimens 1 x DIN A 4 per specimen


Condition A- full flex for 1 h
Full Flex= 440° for 1 h= 2700 cycles

Condition B- full flex for 20 min
Full Flex= 440° for 20 min that is 20 min =900 cycles

Condition C- full flex for 6 min
Full Flex= 440° for 6 min= 270 cycles

Condition D- full flex for 20 cycles
Full Flex= 440° for 20 cycles

Condition E- partial flex for 20 cycles
Partial Flex= 400° for 20 cycles

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Matthias Böhne +49 441 94986-11

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