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.

In short — AI-generated

The Gelboflex test simulates mechanical stress on flexible packaging materials by repeatedly twisting and compressing a film sample. In the Brugger KFT tester, a DIN A4-sized sheet is subjected to a defined number of cycles, typically 100, at a rotation angle of up to 440 degrees.

This test assesses the durability of a material by checking for damage such as pinholes, cracks, or delamination after mechanical strain. The results help developers evaluate whether a packaging film maintains its barrier properties, such as oxygen or water vapor protection, under real-world handling conditions.