ISO 13821:2020 PDF

Scope: This document specifies a method for the determination of the edgewise crush resistance of corrugated fibreboard. The force is applied in the direction of the flute axis. This method is applicable to single-wall (double-faced), double-wall, and triple-wall corrugated fibreboard. It may also be used to test samples taken from corrugated cases and other converted products. While the method is applicable to waxed corrugated fibreboard, care must be taken that the heat used in the waxing step does not affect the corrugated structure. This is controlled by observing that failure during the test still occurs away from the loaded edges.

ISO 13821:2020 Referenced Document

ISO 13820 Paper, board and corrugated fibreboard — Description and calibration of fixed platen compression-testing equipment*， 2021-12-10 Update
ISO 186 Paper and board - Sampling to determine average quality
ISO 187 Paper, board and pulps; standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples*， 2022-01-01 Update

2020 ISO 13821:2020 Corrugated fibreboard — Determination of edgewise crush resistance — Waxed edge method
2002 ISO 13821:2002 Corrugated fibreboard - Determination of edgewise crush resistance - Waxed edge method