The edge crush test is a laboratory test method that is used to measure the cross-direction crushing of a sample of corrugated board. It gives information on the ability of a particular board construction to resist crushing. It provides some relationship with the peak top-to-bottom compression strength of empty singlewall regular slotted containers in laboratory conditions. The edge crush resistance R, expressed in kilonewtons per meter (kN/m) is calculated by the equation: , where is the mean value of the maximum force and is measured in newtons. More details are laid down in ISO 3037.
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| - Kantenstauchwiderstand (de)
- Edge crush test (en)
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| - Der Kantenstauchwiderstand (ECT-Wert – Edge Crush Test) gibt Auskunft darüber, mit welcher maximalen Kraft eine Wellpappenprobe mit einer definierten Länge und Höhe (100 mm × 25 mm) beansprucht wurde. Der Kantenstauchwiderstand , ausgedrückt in Kilonewton je Meter (kN/m), wird berechnet durch die Gleichung: , wobei der Mittelwert der Maximalkraft ist und in Newton angegeben wird.Genaueres regelt die DIN EN ISO 3037, Feb 1996. McKee-Formel: BCT (kN) = 5,876 × ECT (kN/m) × Wurzel aus [Schachtelumfang (m) × Wellpappendicke (m)] (de)
- The edge crush test is a laboratory test method that is used to measure the cross-direction crushing of a sample of corrugated board. It gives information on the ability of a particular board construction to resist crushing. It provides some relationship with the peak top-to-bottom compression strength of empty singlewall regular slotted containers in laboratory conditions. The edge crush resistance R, expressed in kilonewtons per meter (kN/m) is calculated by the equation: , where is the mean value of the maximum force and is measured in newtons. More details are laid down in ISO 3037. (en)
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| - Der Kantenstauchwiderstand (ECT-Wert – Edge Crush Test) gibt Auskunft darüber, mit welcher maximalen Kraft eine Wellpappenprobe mit einer definierten Länge und Höhe (100 mm × 25 mm) beansprucht wurde. Der Kantenstauchwiderstand , ausgedrückt in Kilonewton je Meter (kN/m), wird berechnet durch die Gleichung: , wobei der Mittelwert der Maximalkraft ist und in Newton angegeben wird.Genaueres regelt die DIN EN ISO 3037, Feb 1996. Der ECT-Wert kann zur näherungsweisen Berechnung der Stapelstauchfähigkeit eines Kartons (BCT-Wert) herangezogen werden.Zur Berechnung des BCT-Wertes ist die Formel nach McKee am einfachsten, aber auch am ungenauesten. Das Verhältnis von Höhe zu Umfang muss größer als 1:7 sein; selbst dann gelten noch viele Vorbehalte. McKee-Formel: BCT (kN) = 5,876 × ECT (kN/m) × Wurzel aus [Schachtelumfang (m) × Wellpappendicke (m)] Falls man den Umfang in cm statt in mm einsetzt ergibt sich wegen die Form BCT = 1,86 × ECT × Wurzel aus [Schachtelumfang (cm) × Wellpappendicke (mm)]. (de)
- The edge crush test is a laboratory test method that is used to measure the cross-direction crushing of a sample of corrugated board. It gives information on the ability of a particular board construction to resist crushing. It provides some relationship with the peak top-to-bottom compression strength of empty singlewall regular slotted containers in laboratory conditions. The edge crush resistance R, expressed in kilonewtons per meter (kN/m) is calculated by the equation: , where is the mean value of the maximum force and is measured in newtons. More details are laid down in ISO 3037. Corrugated fiberboard can be evaluated by many material test methods including an edge crush test. There have been efforts to estimate the compression strength of a box (usually empty, regular singlewall slotted containers, top-to-bottom) based on various board properties. Some have involved finite element analysis. One of the commonly referenced empirical estimations was published by McKee in 1963. This used the board ECT, the MD and CD flexural stiffness, the box perimeter, and the box depth. Simplifications have used a formula involving the board ECT, the board thickness, and the box perimeter. Most estimations do not relate well to other box orientations, box styles, or to filled boxes. In order to calculate the value of BCT (Box compression test), the formula of McKee would be the easiest but also the least accurate. The ratio of height to the circumference must be greater than 1:7; even then, are many reservations. Simplified McKee formula: BCT = Box compression test in PoundsU = box outline in inchd = thickness of corrugated board in inch (en)
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