What is the pressure on the Mullen burst?

The pressure on the Mullen burst, also known as Mullen burst strength, refers to the maximum hydraulic pressure exerted on a test specimen before it ruptures or bursts during a bursting strength test. This measurement is crucial for assessing the ability of materials, such as paper, paperboard, and corrugated board, to withstand pressure and impacts in various packaging and industrial applications.

During the Mullen burst test, the specimen is clamped over a diaphragm or rubber membrane within the testing apparatus, and hydraulic pressure is gradually applied until the specimen ruptures. The maximum pressure sustained by the specimen before bursting is recorded as the Mullen burst strength, typically expressed in pounds per square inch (psi) or kilopascals (kPa).

The Mullen burst strength is a critical factor in determining the robustness and durability of packaging materials, especially in applications where they need to resist puncture, compression, or external forces during handling, transportation, and storage.

It's important to note that the specific pressure on the Mullen burst may vary based on the type and thickness of the material being tested, as well as the testing standards and specifications being followed. Adhering to standard testing procedures, such as those outlined in ASTM D3786, ensures consistency and accuracy in determining the pressure at which the material bursts, providing valuable insights into its structural integrity and performance characteristics.