The ISO 2758 standard, published by the International Organization for Standardization (ISO), defines a test method for determining the burst strength of paper subjected to increased hydraulic pressure. This test method is applied to paper with burst strengths ranging from 70 kPa to 1,400 kPa. It is not intended for use with components of a combined cardboard (such as corrugated media or lining), for which the method given in ISO 2759 is more suitable. Given the overlap between the methods for testing paper and cardboard, and in the absence of any commercial agreement, materials with burst strengths below 600 kPa are tested according to this standard.
For materials with a burst strength equal to or greater than 350 kPa, or 250 kPa for components of joined materials, an alternative method based on similar principles is defined in ISO 2759. All components of solid and corrugated cardboard, regardless of burst strength, are tested according to the ISO 2759 standard.
Due to differences in instrument specifications, tests performed on the same material using the procedures described in ISO 2759 and ISO 2758 may not yield the same results.
In this test method, a test piece placed on an annular elastic diaphragm is rigidly clamped at the periphery but free to protrude with the diaphragm. Hydraulic fluid is pumped at a constant rate and inflates the diaphragm until the test piece ruptures. The burst strength of the test piece is the maximum value of the applied hydraulic pressure.
Burst force is defined as the maximum pressure applied perpendicular to the paper surface or cardboard to tear a paper. Bursting strength is the strength property of the paper and the bursting strength test is applied to determine the behavior of the packaging in processes such as transport, loading and unloading. Bursting strength is one of the main factors determining the quality of packaging. The tear resistance of the paper depends on the strength of the fibers, their length and bond strength.
A burst strength tester is used to determine the burst strength of the material. This machine determines the strength of the material used to determine the burst factor and burst index.
Our organization, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, also provides testing services for the determination of the bursting strength of paper, within the scope of ISO 2758 standard, with its trained and expert staff and advanced technological equipment.
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