tear resistance of films

various material analysis – tear resistance of films (elmendorf)

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tear resistance of films (elmendorf)

Tear resistance is the mean force needed to tear a single thickness of sample of plastic film, textile, paper or board. The tear testing can be undertaken either in the tensile testing machine or using the pendulum method (Elmendorf tear tester).

The Elmendorf method is shown in ASTM D1922. The tearing force is generated by the release of the pendulum to which one half of the sample is clamped and the other half being attached to the stationary clamp. The Elmendorf tear test exerts a shearing force perpendicular to the surface of the sample. A test sample normally comprises a pack of 4 sheets of the same direction torn simultaneously. The tear test result units should be millinewtons (mN).

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Some members of impact’s team have over 30 years of polymer experience, with over 120 years combined, and are internationally regarded as product experts including sitting on various CEN committees and being a notified body for construction products (Note because of our notified body status we cannot undertake consultancy on oil storage tanks), we can often identify potential sources of weakness in products without even undertaken testing using our experience.

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