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Friday, September 18, 2020

As discussed in our previous article, there are three common corrugated testing methods: Burst Strength, Edge Crush, and Box Compression. We will be taking a closer look at each of these tests and explain exactly what each measures.

Burst Strength Test

This test is used to find out how much weight a box can carry as well as test rough handling. The Mullen Test, as it's commonly known as, tests the durability or toughness of the walls of the corrugated.

In this testing procedure, a rubber diaphragm is used to apply pressure to the walls of a corrugated box until it bursts. The diaphragm expands using hydraulics until it bursts under pressure.

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burst strength

Edge Crush Test

The Edge Crush tests the stacking strength of corrugated boxes and is also known as ECT. force is applied to one side of the box, perpendicular to the ridges or flutes until the box gets crushed. The diagram below shows the difference between ECT and the Mullen/Burst Strength.

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Edge Crush
Box Compression Test
This test tests the stacking strength of a pallet load or how much can be loaded on top of a box before it begins to deform and how much. It is a test that most industries require when transporting in bulk. The boxes are tested in different orientations and allow companies to come up with pallet configurations without box deformity or damage to the product.

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box compression test