Accession Number : AD0771812
Title : Producing Hardboards from Red Oak.
Descriptive Note : Forest Service research paper,
Corporate Author : FOREST PRODUCTS LAB MADISON WIS
Personal Author(s) : Steinmetz,P. E.
Report Date : 1973
Pagination or Media Count : 15
Abstract : To improve hardboards produced from red oak, extractives were removed, pulp yield reduced, resin content increased, and fiber pH adjusted. The methods were applied to both wet-fromed and dry-formed, phenolic-bonded, high-density boards. Although a large portion of the extractives was removed by washing the pulp with hot water, board quality was not affected. A loss in all properties occurred when the pulp was washed with a one percent sodium hydroxide solution that removed a greater amount of the extractives than did the water. Lowering the pulp yield from 88 to 80 percent improved board strength, but adversely affected linear stability. Increasing resin content improved all properties for both types of boards. Dry-formed boards were greatly improved by adjusting the pH of the fiber prior to resin treatment. (Author)
Descriptors : *Fiberboard, Manufacturing
Subject Categories : Ceramics, Refractories and Glass
Distribution Statement : APPROVED FOR PUBLIC RELEASE