Ranking of Papers by In-Plane Tear Strength and Elmendorf Tear Strength

摘要

Ranking studies have been carried out using Elmendorf tear test and MBR in-plane tear test for offset grade papers manufactured from chemical pulps and for newsprint grade papers. The rank correlation coefficient between two tests for offset grade is significant but for newsprint grade it is quite low. This suggests that Elmendorf tear test is not as relevant to newsprint web runnability as in-plane tear test. For offset papers in-plane tear test does not show any superiority over Elmendorf tear test.