What is the Difference Between Bursting Strength & Compression Strength in the Corrugated Box?

Corrugated boxes are commonly used in packaging because of their strength and ability to safeguard goods during transit. Two important metrics in corrugated packaging are bursting strength and compression strength. While both play a vital role in assessing the box's structural integrity, they evaluate different aspects of its strength and performance.

1. Bursting Strength Definition: Bursting strength measures the capacity of the corrugated box material to resist internal pressure before breaking. This test evaluates the amount of force the paper liner can withstand when pressure is exerted on it.

Test Method: The Bursting Strength Test (BST) uses a hydraulic or pneumatic diaphragm to apply pressure to the corrugated material until it breaks. The result is typically recorded in pounds per square inch (PSI) or kilograms per square centimeter (kg/cm2).

Importance:

·???????? Demonstrates the box's capacity to resist punctures or internal impacts, such as those caused by sharp objects or heavy contents.

·???????? A higher bursting strength indicates greater resistance to sudden impacts, making it ideal for packaging fragile items.

2. Compression Strength Definition: Compression strength assesses a corrugated box's capacity to withstand deformation or collapse under an external vertical load. It indicates the maximum weight the box can support without collapsing.

Test Method: The Box Compression Test (BCT) measures a box's compression strength by placing it between two flat surfaces and applying pressure until it deforms or collapses. The result is usually recorded in pounds (lbs) or kilograms (kg).

Importance:

·???????? Assesses the box's stacking strength, making it crucial for warehouse storage and shipping situations where boxes are stacked.

·???????? A high compression strength ensures the box retains its shape and safeguards its contents under significant external loads.

Conclusion Both bursting strength and compression strength are essential for evaluating the performance and durability of corrugated boxes. Bursting strength measures a box’s resistance to internal punctures or tears, while compression strength assesses how much external weight the box can endure without collapsing. Recognizing these distinctions helps manufacturers and consumers select the most suitable corrugated box for their packaging requirements.