# What is box crush test?

## What is box crush test?

In the box crush and stacking crush tests the strength or stackability of corrugated cardboard boxes or folding boxes is determined.

### What does ECT mean for boxes?

Edge Crush Test
The Edge Crush Test, or ECT, is a newer test developed to look specifically at how much force a corrugated material can withstand on its edges without crushing. Instead of applying force to the face of the corrugated material, as the Mullen Burst Test does, ECT applies force to the edge.

How do you calculate the ECT of a corrugated box?

It is measured by compressing a small segment of board on edge between two rigid platens or plates perpendicular to the direction of the flutes until a peak load is established. This is measured in pounds per lineal inch of load bearing edge (lb/in), but usually reported as an ECT value (for example, 44 ECT). 40 lbs.

What is RCT test in Kraft paper?

The ring crush test (RCT) is utilized to decide the ring smash opposition of a paper strip shaped into a ring with an institutionalized length and width. The ring crush test is like the limited capacity to focus test in that the quality of the liner or fluting is estimated both in the machine course and opposite to it.

## What is 200lb test box?

Uline 200 lb. test boxes are made with heavier paper and have 50% greater bursting strength than 32 ECT boxes. Greater bursting strength means fewer crushed and damaged boxes during shipping. 200 lb. test boxes perform more consistently.

### How is ECT measured?

ECT is a measure of the edgewise compressive strength of corrugated board. It is measured by compressing a predefined section of board on its edge between two rigid platens. This compression is performed perpendicularly to the direction of the flutes until the board collapses and a peak load is reached.

What does 48 ECT stand for?

As an example, 32 ECT is similar to a standard box strength. 44 ECT is a heavy duty box strength. 48 ECT is a heavy duty double wall box strength.

What is the difference between 200 lb test boxes and 32 ECT boxes?

200 lb. test refers to bursting strength, while 32 ECT refers to stacking strength. Boxes that meet 200 lb. test will also exceed 32 ECT stacking strength.

## Is a 44 ECT a double wall?

This type of box can be purchased in single or double wall to resist tearing, splitting, or bursting. All of our heavy duty boxes are 44 ECT and are approximately 35% stronger than standard boxes.

### What is RCT in box?

RCT -> RING CRUSH TEST. It is the measure of force required to crush a strip of paper. (cut in a predefined size) and is tested in the machine by crushing. It is in the shape of a ring.

How do you calculate RCT to ECT?

RCT = 0.9625 where the ECT, SCT and RCT are in kN/m, the correlating constant (k) is dimensionless and α is the profile and plant specific flute take up factor.

What does 32 edge crush test mean?

test refers to bursting strength, while 32 ECT refers to stacking strength. Boxes that meet 200 lb. test will also exceed 32 ECT stacking strength.