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BSI BS ISO 5629:2017

Paper and board. Determination of bending stiffness. Resonance method
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BSI BS ISO 5629:2017

Paper and board. Determination of bending stiffness. Resonance method

PUBLISH DATE 2017
PAGES 20
BSI BS ISO 5629:2017

This document specifies a method for the determination of bending stiffness using the resonance method.

This method gives only a single result for each test piece tested, although in general, bending stiffness values may depend on which surface of the material forms the inner surface of the arc resulting from bending forces.

The bending stiffness of a very wide range of papers and boards can be measured using this method. However, for some materials, such as those listed below, the measured numerical values will not be strictly identical with bending stiffness as defined in 3.1:

  1. multi-ply papers and boards in which the component plies can move separately during a test;

  2. papers and boards with appreciable curl, especially if the axis of the curl is in the long direction of the test piece;

  3. some soft papers with grammage below about 40 g/m2.

This method is not applicable to corrugated boards.

SDO BSI: British Standards Institution
Document Number ISO 5629
Publication Date Dec. 22, 2017
Language en - English
Page Count 20
Revision Level
Supercedes
Committee PAI/11
Publish Date Document Id Type View
Dec. 22, 2017 BS ISO 5629:2017 Revision