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TAPPI T 403 Bursting strength






Bursting strength of paper


TAPPI T 403 Bursting strength is designed to measure the maximum bursting strength of paper and paper products having a bursting strength of 50 kPa up to 1200 kPa (7 psi up to 175 psi) and in the form of flat sheets of up to 0.6 mm (0.025 in.) thick. Materials that can be tested using this method include newsprint, bag paper, fine paper, packaging paper, and printing papers. It is not intended for use in testing corrugated, fiberboard, linerboard, or hardboards that tend to cut the thin rubber diaphragm of the bursting tester. For testing paperboard and linerboard, see TAPPI T 807 “Bursting Strength of Paperboard and Linerboard”; for testing corrugated and solid fiberboard, see TAPPI T 810 “Bursting Strength of Corrugated and Solid Fiberboard.”


The test specimen, held between annular clamps, is subjected to an increasing pressure by a rubber diaphragm, which is expanded by hydraulic pressure at a controlled rate, until the test specimen ruptures. The maximum pressure reading up to the rupture point is recorded as the bursting strength.


Bursting strength is widely used as a measure of resistance to rupture in many kinds of paper. The test is relatively easy and inexpensive to make and appears to simulate some end use requirements.


To perform adequate testing ten, 8.5″ x 11″ sheets are requested. Twenty replicates requiring an area of 2.5″ by 2.5″ are to be tested. Ten on the wire side of the paper and ten on the felt side.  Areas that contain creases or visible damage can not be tested. If sample quantity is limited, testing can be done by sampling fewer sheets and/or performing fewer replicates. This sampling information should be adequate for four or five TAPPI methods per request. If more methods are requested, please call to verify the necessary amount of sample.


Please note:

SGS-IPS cannot sell or otherwise provide standards, specifications, or test procedures to third parties.