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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
Open Access
Controllable anisotropic properties of wet-laid hydroentangled nonwovens, TAPPI Journal March 2019

ABSTRACT: For nonwovens, fiber orientation distribution is an important structural characteristic that directly influences the anisotropic properties of the materials. Different Vslurry/Vbelt ratios were adopted to fabricate nonwovens during the wet-laid process. The results indicated that fiber orientation distribution of nonwovens can be regulated by adopting different Vslurry/Vbelt ratios owing to the web-forming principle of wet-laid techniques. Mechanical tests showed that both wet and dry tensile strength of nonwovens in different angle directions present anisotropy under different Vslurry/Vbelt ratio parameters. A liquid spreading distribution experiment proved that liquid spreading length and area of nonwovens could be manipulated using different Vslurry/Vbelt ratios in the fabrication process. Therefore, specific anisotropic properties of wet-laid hydroentangled nonwovens can be realized by controlling the process parameters for particular end-use applications.

Journal articles
Magazine articles
Open Access
Editorial: Celebrating Wayne Carr

Editorial: Celebrating Wayne Carr: A true recycling visionary, TAPPI JOURNAL November 2017

Journal articles
Magazine articles
Open Access
Editorial: To paper and beyond at the University of Minnesot

Editorial: To paper and beyond at the University of Minnesota, TAPPI JOURNAL October 2017

Journal articles
Magazine articles
Open Access
Lignin value prior to pulping (LVPP): An advanced pulping c

Lignin value prior to pulping (LVPP): An advanced pulping concept, TAPPI JOURNAL October 2017

Journal articles
Magazine articles
Open Access
Degradation of 2,4-dichlorophenol by melamine amine cellulos

Degradation of 2,4-dichlorophenol by melamine amine cellulose- immobilized lacasses, TAPPI JOURNAL October 2017

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Magazine articles
Open Access
Editorial: Multifaceted research at the University of Maine

Editorial: Multifaceted research at the University of Maine, TAPPI JOURNAL September 2017

Journal articles
Magazine articles
Open Access
Editorial: Remembering Phil Clark: A Coating “Master Man”, TAPPI JOURNAL July 2018

Editorial: Remembering Phil Clark: A Coating “Master Man”, TAPPI JOURNAL July 2018

Journal articles
Magazine articles
Open Access
Effect of pH and enzymes on strength of recycled fibers during refining, TAPPI JOURNAL July 2018

Effect of pH and enzymes on strength of recycled fibers during refining, TAPPI JOURNAL July 2018

Journal articles
Magazine articles
Open Access
Editorial: TAPPI Journal 2017 Best Research Paper Award recognizes recycling technology, TAPPI JOURNAL June 2018

Editorial: TAPPI Journal 2017 Best Research Paper Award recognizes recycling technology, TAPPI JOURNAL June 2018

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