Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (126 KB bytes)

Title: Tests for Z-direction fiber orientation

Author: Vahey, David W.; Considine, John M.;

Date: 2007

Source: 61st Appita Annual Conference and Exhibition : Gold Coast, Australia, 6-9 May 2007 : proceedings. Carlton, VIC : Appita, c2007: ISBN: 9780975746928: Pages 53-59

Publication Series: Miscellaneous Publication

Description: Fibers that acquire a Z-direction tilt in the forming process help bond adjacent strata of the paper sheet, increasing Z-direction shear and other properties. For certain tests, this manifests itself as a test difference upon 180° in-plane rotation of the sheet. Seven of eight different paper grades ranging in grammage from 73 to 268 g/m2 were found to show this difference for Scott internal bond tests, directional brightness tests, or both. Directional effects were compared using an extensional and a shear metric. One-third of comparisons showed significant directional effects at the 75-100% confidence level, including roughly equal numbers of Scott bond and brightness comparisons. However, the two tests did not reinforce each other strongly; agreement regarding directional effects occurred in only 60% of comparisons. The number of significant effects in the cross-machine direction matched those in the machine direction (MD), suggesting a more complex model may he needed. The best support for the fiber-tilt model was in the case of MD Scott-internal-bondtesting.

Keywords: Paper, testing, orientation, fibers, papermaking, shear, Student's t-test, shear strength, Z-direction, wood fibers, testing, paper, strength, brightness, bond strength, fiber tilt, grain, test directionality, running direction, Scott internal bond, brightness, tape pull, fiber pull, confidence, significance, toward headbox, toward reel, Fourdrinier, rush, drag

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Vahey, David W.; Considine, John M. 2007. Tests for Z-direction fiber orientation. 61st Appita Annual Conference and Exhibition : Gold Coast, Australia, 6-9 May 2007 : proceedings. Carlton, VIC : Appita, c2007: ISBN: 9780975746928: Pages 53-59

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.