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TAPPI T822 om-11
- Ring Crush of Paperboard (Rigid Support Method)
- standard by Technical Association of the Pulp and Paper Industry, 2011
- Publisher: TAPPI
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1.1 The ring crush test correlates with edgewise compression strength of paperboard (1,2).
1.2 This method is intended for paperboard between 0.28 mm (0.011 in.) and 0.61 mm (0.024 in.) thick. Itmay be used with less reliability for paperboard as thin as 0.18 mm (0.007 in.) and as thick as 0.76 mm (0.030 in.).
NOTE 1: Caution should be used when testing linerboard less or greater than the specified thickness as the results may be less reliable. Forpapers thinner than 0.28 mm (0.011 in.), test values may result from a combination of both buckling failure and pure compression.For papers thicker than specified, strain within the sample arising from bending the specimens into a cylinder may impact testresults (3,4).
1.2 This method is intended for paperboard between 0.28 mm (0.011 in.) and 0.61 mm (0.024 in.) thick. Itmay be used with less reliability for paperboard as thin as 0.18 mm (0.007 in.) and as thick as 0.76 mm (0.030 in.).
NOTE 1: Caution should be used when testing linerboard less or greater than the specified thickness as the results may be less reliable. Forpapers thinner than 0.28 mm (0.011 in.), test values may result from a combination of both buckling failure and pure compression.For papers thicker than specified, strain within the sample arising from bending the specimens into a cylinder may impact testresults (3,4).
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