The issue of how to maximize the value recovery from beetle-attacked pine wood is critical to the wood panel industry in British Columbia. This paper discusses the pilot plant tests and mill trials that were conducted to quantify the impact of using mountain pine beetle (MPB)-attacked lodgepole pine (Pinus contorta Douglas) wood on green veneer processing to determine of it makes economic sense to sort and process MPB logs separately from normal logs of SPF (spruce-lodgepole pine-alpine fir) mix for plywood manufacturing.--Includes text from document.
Contents: Intro.; The Changing Mgmt. Context; Previous Studies on Effects of Disturbance on Wood Quality; After the Fire: Changes in Dead and Dying Conifers; Predicting Conifer Mortality Following Fires; Types of Changes in the Wood of Dead Conifers; Insect Damage to Conifers; Stain and Decay Fungi Damage to Conifers; Factors Influencing the Rate of Deterioration; Species-Specific Changes in Wood Quality of Dead and Dying Conifers; Douglas-Fir; Englemann Spruce and White Spruce; Grand Fir and White Fir; Lodgepole Pine; Ponderosa, Sugar, Western White, and Jeffrey Pine; Subalpine Fir; Western Hemlock; Western Larch; Wood Quality Changes and Econ. Values; Visual Classification Systems; Volume and Value Loss. Conclusions.
This study is part of a series of research papers that explore the biological, social, and economic aspects of British Columbia's mountain pine beetle epidemic. This document reports on a project conducted to determine the impact of using mountain pine beetle (MPB)-attacked wood on plywood manufacturing processes and to implement the optimum processing parameters in mill production in order to increase value recovery and productivity. The specific objectives of the project were to investigate and quantify the effect of beetle-wood veneer on veneer visual and stress grading; the efffect of beetle-wood veneer on gluing, panel lay-up and gluebond performance; the effect of beetle-wood veneer on the plywood hot pressing process and resulting panel quality, stiffness, and strength; and the costs and benefits of adjusting manufacturing processes in a mill trial that transfers the technology.--Includes text from document.
British Columbia has a large wood veneer products industry, producing predominantly plywood and laminated-veneer lumber (LVL). However, the damage done by the mountain pine beetle (Dendroctonus ponderosae, MPB) infestation has reduced material recovery and made the British Columbia plywood mills lose market share and mill profit. This project investigated the technical feasibility and economic benefits of using phenol formaldehyde resins to treat mountain pine beetle-attacked lodgepole pine (Pinus contorta Dougl.) veneers and to produce high-performance, durable engineered wood products.--Document.
This report provides a general overview of current log sort yard operations in the United States, including an extensive literature review and information collected during on-site visits to several operations throughout the nation. Log sort yards provide many services in marketing wood and fiber by concentrating, merchandising, processing, sorting, and adding value to logs. Such operations supply forest products firms with desired raw materials, which helps improve their bottom line by reducing the number of marginal logs processed. Ultimately, sorting logs leads to better use of the available timber resources. Successful log sort yards are self-sufficient and have well-established markets and a steady supply of wood. Log sort yard concepts and analyses described in this report have broad applications.
This report highlights past delivery of the land-based programs and progress of mountain pine beetle research during 2003 & 2004 by the Mountain Pine Beetle Initiative, a six-year program established to address the mountain pine beetle epidemic in western Canada and to reduce the risk of future such epidemics. After an introduction on the epidemic and the Initiative, the report summarizes the accomplishments of the Private Forestlands Rehabilitation Program, the Federal Forestlands Rehabilitation Program (First Nations, National Parks, and Other Federal Forestlands components), and the research & development program (including research on ecology, forest economics, socio-economic processes & risk reduction). Finally, the next steps in the land-based and research & development programs are discussed.
Recent progress in enhancing and refining the performance and properties of wood composites by chemical and thermal modification and the application of smart multi-functional coatings have made them a particular area of interest for researchers. Wood Composites comprehensively reviews the whole field of wood composites, with particular focus on their materials, applications and engineering and scientific advances, including solutions inspired biomimetrically by the structure of wood and wood composites. Part One covers the materials used for wood composites and examines wood microstructure, and wood processing and adhesives for wood composites. Part Two explores the many applications of wood composites, for example plywood, fibreboard, chipboard, glulam, cross-laminated timber, I-beams and wood-polymer composites. The final part investigates advances in wood composites and looks at the preservation and modification of wood composites, environmental impacts and legislative obligations, nano-coatings and plasma treatment, biomimetic composite materials, the integration of wood composites with other materials and carbonized and mineralized wood composites. - Comprehensively reviews the entire field of wood composites in a single volume - Examines recent progress in enhancing and refining the performance and properties of wood composites by chemical and thermal modification and the application of smart multi-functional coatings - Explores the range of wood composites, including both new and traditional products
