The bursting strength of cardboard can be calculated by testing the rupture resistance. The break resistance test is a common method used to evaluate the ability of cardboard to resist cracking by internal pressure and external forces.

The following are the general steps for calculating the bursting strength of cardboard:

How to calculate the bursting strength of cardboard

Perform a break resistance test: Use a break resistance tester to test. The instrument applies pressure by applying a gradually increasing internal air pressure until the cardboard breaks. A cardboard sample of a certain size is required for testing.

Record the value of the break resistance: In the process of the break resistance test, record the maximum pressure value of the cardboard before breaking. This value indicates the breakage resistance of the paperboard.

Determine the base weight of the cardboard: Determine the base weight of the cardboard by weighing the sample. The base weight is usually measured in grams or pounds.

Calculation of bursting strength: Use the following formula to calculate the bursting strength of the cardboard:

Burst strength = rupture resistance/reference weight

Here, the break resistance is the maximum pressure value recorded in the break resistance test before the cardboard breaks, and the base weight is the weight of the cardboard sample.

How to calculate the bursting strength of cardboard

The unit of burst strength is usually kilopascal/gram (kPa/g) or pound force/pound (psi/lb), indicating the breakage resistance of the cardboard at unit weight.

Rupture resistance and blasting strength are important indicators to evaluate the resistance of cardboard to rupture, but they cannot completely represent all the performance characteristics of cardboard. In practical applications, it is also necessary to consider other performance indicators of cardboard, such as bending stiffness, indentation strength, tensile strength, etc., in order to comprehensively evaluate the quality and applicability of cardboard.