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ISO 5628:2019

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Paper and board - Determination of bending stiffness - General principles for two-point, three-point and four-point methods

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This document specifies three test methods for determining the bending stiffness of paper and paperboard. The test methods differ in the type of loading mode, thus giving rise to the two-point, three-point and four-point bending test methods.

For paper and paperboard in a low thickness range, the two-point bending method and the three-point bending method are suitable.

For corrugated fibreboard and board with a higher thickness, the four-point bending method is recommended.

The measurement conditions are defined in such a way that the test piece is not subjected to any significant permanent deformation during the test, nor is the range of validity of the formulae for calculating the bending stiffness exceeded.

In these bending tests, the test pieces of paper and board are regarded as "beams" as defined by the science of the strength of materials, see Reference [2].


SDO ISO: International Organization for Standardization
Document Number ISO 5628
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 6/SC 2
Publish Date Document Id Type View
Not Available ISO 5628:2019 Revision