标准编号：ISO 5628:2019
中文名称：纸和纸板 弯曲刚度的测定 两点法、三点法及四点法的一般原则
英文名称：Paper and board — Determination of bending stiffness — General principles for two-point, three-point and four-point methods
发布日期：2019-05
标准范围
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.
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