The bursting strength of cardboard can be calculated by bursting resistance testing. Burst resistance testing is a commonly used method to assess the ability of cardboard to resist internal pressure and external forces to break.
The following are the general steps for calculating the burst strength of cardboard:
Perform Burst Resistance Test: Test with a Burst Resistance Tester. This instrument applies pressure by applying a gradually increasing internal air pressure until the cardboard breaks. A cardboard sample of a certain size needs to be prepared for the test.
Record Burst Resistance Value: During the Burst Resistance Test, record the maximum pressure value of the cardboard before it breaks. This value represents the bursting resistance of the cardboard.
Determine the base weight of the cardboard: Determine the base weight of the cardboard by weighing the sample. The base weight is usually in grams or pounds.
Calculate Burst Strength: Calculate the Burst Strength of cardboard using the following formula:
Burst Strength = Burst Resistance/Reference Weight
Here, the burst resistance is the maximum pressure value recorded in the burst resistance test before the cardboard breaks, and the reference weight is the weight of the cardboard sample.
The unit of bursting strength is usually kPa/gram (kPa/g) or pound force/pound (psi/lb), which indicates the bursting resistance of cardboard per unit weight.
Burst resistance and bursting strength are important indicators for evaluating the resistance of cardboard to cracking, but they cannot fully represent all performance characteristics of cardboard. In practical applications, other performance indicators of cardboard, such as flexural stiffness, indentation strength, tensile strength, etc., need to be considered to comprehensively evaluate the quality and applicability of cardboard.
