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Wood hardening for value-added uses

https://library.fpinnovations.ca/en/permalink/fpipub5557
Author
Dai, Chunping
Feng, Martin
Date
March 2001
Edition
37569
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Dai, Chunping
Feng, Martin
Contributor
Alberta Innovation and Science
Date
March 2001
Edition
37569
Material Type
Research report
Physical Description
26 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Seasoning high frequency
Seasoning
Populus
Aspen
Series Number
W-1752
Location
Vancouver, British Columbia
Language
English
Abstract
In this report, a comprehensive literature review on wood hardening has been conducted. In addition, a Japanese wood densification method that uses compression and RF heating has been applied to densify Aspen lumber from Alberta. The main conclusions are: 1. Wood can be densified through compression under heat as evidenced by the Japanese compression method. 2. The densified Aspen lumber can be as hard and strong as known hardwoods such as Oak and Beech. Problems, however, exist: arcing associated with RF heating, property variation associated with arcing and micro fracturing, also dimensional fixation. 3. Wood can also be densified and hardened by resin impregnation. This approach has been extensively covered by a literature review including a number of recent patents. 4. The Induriteä process can also be considered as an impregnation process, which has been commercialized in New Zealand and claimed to be environmentally sound. 5. Very little work has been done on the densification and hardening of Aspen, an important wood species in the province of Alberta. Based on the results of this study, an approach of combining the advantages of both wood densification using conventional heating and resin impregnation is recommended to be explored for the hardening of Alberta wood species, particularly Aspen. Reasons for the recommendation are given in this report.
Densification
Seasoning - High frequency
Compreg
Populus - Compression wood
Modified woods
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