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Dry-Process Hardboards from Recycled Newsprint Paper Fibers

Published online by Cambridge University Press:  15 February 2011

Andrzej M. Krzysik ,
John A. Youngquist ,
James M. Muehl ,
Roger M. Rowell ,
Poo Chow  and
Steven R. Shook
Andrzej M. Krzysik
Affiliation:
USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53705-2398
John A. Youngquist
Affiliation:
USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53705-2398
James M. Muehl
Affiliation:
USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53705-2398
Roger M. Rowell
Affiliation:
Wood Science and Technology, University of Illinois, 1301 West Gregory Street, Urbana, IL
Poo Chow
Affiliation:
Wood Science and Technology, University of Illinois, 1301 West Gregory Street, Urbana, IL
Steven R. Shook
Affiliation:
Wood Science and Technology, University of Illinois, 1301 West Gregory Street, Urbana, IL
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Abstract

Dry-process hardboard represents a favorable option for recycling old newspaper fibers. However, dry-process boards tend to be less dimensionally stable than boards processed by other methods. Our objective was to determine the effects of various wood fiber (WF) to old newspaper (ONP) ratios (100:0, 50:50, and 0:100 WF/ONP) on the mechanical strength and water resistance of dry-process hardboards made from these fibers. Untreated and acetylated hardboards were made with 3 or 7 percent resin and 0.5 percent wax. Boards were tested for static bending and tensile strength properties and water resistance. As expected, increasing the resin level from 3 to 7 percent generally improved all measured properties. Acetylation substantially improved the water resistance of all boards; increasing the amount of ONP caused a corresponding deterioration in both mechanical properties and water resistance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 266: Symposium LA – Materials Interactions Relevant to Recycling of Wood-Based Materials , 1992 , 73
Copyright
Copyright © Materials Research Society 1992

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