Aspen Bibliography

Relationship of fiber preparation and characteristics to performance of medium-density hardboards

G.C. Myers

Document Type

Article

Journal/Book Title/Conference

Forest Products Journal

Volume

33

Issue

10

First Page

43

Last Page

51

Publication Date

1983

Abstract

Techniques of characterizing and processing wood fibers were investigated as a means of evaluating the effects of raw material manipulation on strength properties and dimensional movement of hardboard. Four species of wood, two hardwoods and two softwoods, were refined to four drainage rates. In addition to drainage rate, the resulting fiber was characterized by fiber length, BauerMcNett screen fractionation, and scanning electron microscopy. Wet-formed, medium-density hardboards were prepared from the pulps and evaluated for static bending, internal bond, tensile strength parallel to the surface, and dimensional movement between 50 and 90 percent relative humidity (RH) and between 50 percent. RH and water soak. Relationships between wood species, fiber characteristics, and hardboard performance were examined. There was considerable variation in response of strength properties and dimension change to changes in fiber drainage rate. No single drainage rate was found that would provide maximum strength and minimum dimension change for all four wood species

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