TAPPI T807 Burst Test of Linerboard

TAPPI T807 – Bursting Strength of Linerboard. The TAPPI T807 test is a standard that outlines the bursting strength of linerboard materials. The test involves measuring the force required to rupture a specimen using a hydraulic pressure mechanism. The test measures the burst strength of a sheet of linerboard in pounds per square inch (PSI).

To perform the test, a sample of linerboard is cut and clamped in place over a rubber diaphragm using a round metal ring. Water is then introduced to the diaphragm at a controlled rate, causing the pressure to increase until the specimen ruptures. The pressure required to cause the rupture is recorded as the burst strength.

The T807 test is used to measure the quality of linerboard used in the manufacture of corrugated cardboard boxes. The test helps to gauge the ability of the linerboard to withstand the stresses of transportation, handling, and storage. It is also an important quality control test used by paper and packaging manufacturers to ensure consistent product quality. It is inexpensive and relatively easy to perform with results that simulate the strength characteristics of some end use requirements. This is achieved by securing the material between annular clamps and applying increasing pressure through a rubber disk until failure occurs. The maximum pressure up to material rupture is recorded as the bursting strength.