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Evaluating hardness and the S-test, TAPPI Journal March 2019

ABSTRACT: The corrugated industry typically quantifies crush resistance using the Concora corrugated medium test (CMT) on fluted medium or flat crush on combined board. These tests compress the materials until the point of complete failure of the flutes. Combined board elastically resists crushing forces until a certain point, the hardness of the structure, while additional load causes permanent damage and deformation. This study investigates how hardness can be measured directly from a load curve collected during CMT (or flat crush) testing and how it varies throughout the North American paper supply. It also explores how hardness corre-lates with the values obtained from the newly developed S-test. This new test method deserves further study as a potentially more appropriate specification for crush resistance of corrugated medium.

Journal articles
Magazine articles
Etex Bègles Paper Mill Raises Paperboard Performance, Paper360º March/April 2019

Etex Bègles Paper Mill Raises Paperboard Performance, Paper360º March/April 2019

Journal articles
Magazine articles
The Next-Generation QCS, Paper360º November/December 2016

The Next-Generation QCS, Paper360º November/December 2016

Journal articles
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RISI’s 2018 European CEO of the Year, Paper360º March/April

RISI’s 2018 European CEO of the Year, Paper360º March/April 2018

Journal articles
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Progroup Turns 25, Paper360º March/April 2018

Progroup Turns 25, Paper360º March/April 2018

Journal articles
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TAPPI Journal Summaries, Paper360º January/February 2017

TAPPI Journal Summaries, Paper360º January/February 2017

Journal articles
Magazine articles
How Does China’s Containerboard Market Compare, Paper360º,

How Does China’s Containerboard Market Compare, Paper360º, July/August 2017

Journal articles
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New Outlook for Ecologic, Paper360º March/April 2017

New Outlook for Ecologic, Paper360º March/April 2017

Journal articles
Magazine articles
Pulp in a Frenzy, Paper360º, January/February 2018

Pulp in a Frenzy, Paper360º, January/February 2018

Journal articles
Magazine articles
TAPPI Journal Summaries, Paper360º July/August 2018

TAPPI Journal Summaries, Paper360º July/August 2018

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