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The Use of MD Shear Stiffness by the Torsional Stiffness Technique to Predict Corrugated Board Properties and Box Performance

61st Appita Annual Conference and Exhibition, Gold Coast, Australia 6-9 May 2007: Proceedings

Abstract: The machine direction (MD) torsional stiffness technique to measure the MD shear stiffness of corrugated board (torsional stiffness=shear stiffness) was introduced to the Australasian industry at the 2006 Appita Conference [1]. This paper discusses results using the new method on corrugated board, pre and post box manufacture and at different levels of purposely crush-damaged corrugated board. The results are compared to data from other traditional board testing methods. Ensis Papro has a cyclic humidity creep compression facility and initial work to study the effect of variable MD torsional stiffness on box performance under cyclic humidity conditions shows distinctive power series curves of lifetime versus applied load for similar boxes made from the same material but with varying degrees of crush damage as measured by the MD torsional stiffness technique. Compared to conventional tests such as flat crush (FCT), thickness, edge crush (ECT) or box crush (BCT), MD torsional stiffness is a more sensitive predictor of corrugated board performance ex the corrugator and quantifier of the amount of damage incurred during the box conversion process. It was found that on board blanks subjected to a crush damage, the ECT value was 91% of the value of uncrushed board, the BCT was 87%, the MD torsional stiffness was 55% and the final cyclic humidity box performance was 59% of the uncrushed value.

To cite this article: Chalmers, Ian R. The Use of MD Shear Stiffness by the Torsional Stiffness Technique to Predict Corrugated Board Properties and Box Performance [online]. In: Appita Conference and Exhibition (61th : 2007 : Gold Coast, Qld.). 61st Appita Annual Conference and Exhibition, Gold Coast, Australia 6-9 May 2007: Proceedings. Carlton, Vic.: Appita Inc., 2007: 145-150. Availability: <http://search.informit.com.au/documentSummary;dn=798571288931439;res=IELENG> ISBN: 9780975746928. [cited 24 May 17].

Personal Author: Chalmers, Ian R; Source: In: Appita Conference and Exhibition (61th : 2007 : Gold Coast, Qld.). 61st Appita Annual Conference and Exhibition, Gold Coast, Australia 6-9 May 2007: Proceedings. Carlton, Vic.: Appita Inc., 2007: 145-150. DOI: Document Type: Conference Paper, Research ISBN: 9780975746928 Subject: Torsion; Shear (Mechanics); Packaging--Materials; Corrugated paperboard--Testing; Affiliation: (1) Senior Scientist, Appita member, Ensis Papro, Private Bag 3020, Rotorua, New Zealand

Database: Engineering Collection