Flat crush tests (FCT) are performed to DIN EN ISO 3035 or TAPPI T 825. In the flat crush test, a single-flute corrugated board specimen is loaded perpendicular to its surface. The resistance this corrugated board presents to the force provides an indication of its behavior during processing and in use. It is important that force application to the specimen is exactly perpendicular during these tests.
- Depending on individual flute heights, the highest flutes collapse first, then the middle ones, followed by the remaining flutes at the end of the test.
- The crush energy and curve provide indications of the level of any predamage which may be present, since the curve is fundamentally different if the cardboard has been subjected to predamage.
- If the corrugated cardboard has been predamaged, the curve is fundamentally different. The crush energy and curve provide indications of the level of any predamage.
- Precision-guided compression plates ensure extremely high lateral stiffness, guaranteeing reproducible test values.
- The compression plates are suitable for the ring crush test (RCT), the flat crush test (FCT), the edge crush test (ECT) and the corrugating medium test (CMT).
- Modern miniature flutes tend to collapse only under forces greater than 10kN, requiring extremely high lateral stiffness in the compression plates. Suitable plates are available from ZwickRoell for these applications.
- A circular cutter is used to ensure accurate specimen preparation.
Our static materials testing machines are designed for universal application.This makes it easy to implement individually tailored testing solutions in addition to our standard solutions.
With our AllroundLine materials testing machine with four measuring axes, all relevant tests for predicting the compression strength of cardboard can be determined in a single machine, and various tests can be performed in paper testingIn this example,
- the ECT, FCT, CMT and RCT crush tests are performed in the upper test area.
- In the lower test area (from left to right), the SCT, the tensile test, and the 4-point flexure test are performed.
- Expansion options through additional slots, extensometers, safety doors and other accessories.
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