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21	Fire performance of connections in laminated veneer lumber : fire engineering research thesis : a research thesis presented to University of Canterbury in fulfilment of the thesis requirement for the degree of Master of Engineering (Fire) / Chuo, Terence Chung Biau. January 1900 (has links) Thesis (M.E.F.E.)--University of Canterbury, 2007. / Typescript (photocopy). "February 2007." Includes bibliographical references (p. 129-133). Also available via the World Wide Web.
22	The effect of hot-pressing parameters on resin penetration and flakeboard layer properties Brady, Derwood E. January 1987 (has links) The area of penetration of phenol-formaldehyde resin into aspen (<i>Populus tremuloides</i>) and Douglas-fir (<i>Pseudotsuga menziesii</i>) flakes, and the layer properties of yellow poplar (<i>Liriodendron tulipifera</i>) flakeboard were investigated to determine how they were influenced by various pressing parameters. The evenness of penetration was found to be a function of the natural variability of the wood and was not influenced by the pressing parameters of temperature, moisture content, pressure, or time. These four parameters were found to influence the area of penetration by controlling the viscosity and flow of the resin. The temperature, gas pressure, and platen pressure history at any particular plane through a flakeboard panel thickness were found to be directly and interactively determined by the pressing parameters of platen temperature, initial mat moisture content, and press closing time. The specific gravity profile was observed to be a function of the press closing time while platen temperature and the mat moisture content influenced the amount of springback which the panel exhibited. Layer-shear and the corresponding specific gravity at a particular plane were found to be similarly dependent on environmental history. The layer-shear strength increased consistently toward the surface of the panel and exhibited a lower coefficient of variation nearer the surface. / M.S. LD5655.V855 1987.B728 Laminated wood Particle board Veneers and veneering
23	Essential oil treatment of VTC wood Scouse, Adam A. 13 September 2012 (has links) Western juniper and cinnamon essential oils were combined with ethanol at 2.5, 5, and 10% concentrations by weight and applied to hybrid poplar (Populus trichocarpa x P. deltoids) veneers by vacuum soaking to produce a naturally durable wood veneer with increased mechanical properties for use in structural composites. Half of these veneers were then modified using viscoelastic thermal compression to increase veneer density and modulus of elasticity. Following densification, unprocessed and VTC processed veneers receiving an essential oil treatment were subjected to an AWPA E21-06 Formosan termite exposure test, AWPA E24-06 mold box test, and brown rot (Gloeophyllum trabeum) decay bending test. While VTC processing drastically reduced the abundance of chemical components inherent within essential oil treatments, veneer specimens without VTC processing showed increased durability. A 10% juniper oil treatment drastically reduced Formosan termite attack on hybrid poplar veneers while a 10% cinnamon oil treatment significantly reduced mold growth. Timbor��, an industrial powdered borate treatment, withstood VTC processing and inhibited Formosan termite attack and mold growth. Tests to evaluate the effectiveness of essential oil treatments against brown rot were unsuccessful. Results suggest that incorporating a disodium octaborate tetrahydrate (DOT) treatment prior to VTC processing could help improve VTC wood durability. / Graduation date: 2013 Essences and essential oils Wood preservatives Veneers and veneering Wood -- Preservation Wood, Compressed Black cottonwood
24	A Study to Determine the Effectiveness of Polyethylene Glycol 1000 for Forming Wood Veneer Projects from Green Lumber Koesler, Rudolph John 12 1900 (has links) The problem was to determine the effectiveness of using polyethylene glycol 1000 in the treatment of green wood for the purpose of forming projects made of wood veneer and of simple design for use in junior high or high school woodworking classes. The purpose of this study was to seek answers to the following questions. 1. Is polyethylene glycol 1000 an effective stabilizing agent for green wood veneer that can be used in school woodworking classes? 2. Can green wood veneer treated with polyethylene glycol 1000 be bent to form simple woodwork projects? 3. Can green wood veneer treated with polyethylene glycol 1000 be successfully used in junior high and high school woodworking classes? 4. What length of treatment time is best for green wood veneer that is to be used to form simple bent wood projects? 5. Is one-fourth inch thickness suitable for green wood veneer that is to be treated with polyethylene glycol 1000 and used to form simple bent wood projects? dimensional stability of wood wood veneers forming green wood wood shrinkage method of softening wood Polyethylene glycol. Wood bending. Veneers and veneering.
25	Key factors influencing checking in maple veneered decorative hardwood plywood Burnard, Michael D. 23 October 2012 (has links) Face checking in decorative maple veneered plywood panels is a significant problem for hardwood plywood manufacturers, furniture makers, cabinetmakers, and consumers. Efforts made by panel producers and researchers to minimize checking conducted to-‐date have been limited, and produced contradictory results. In this study the impact of four manufacturing factors believed to contribute to check development in decorative maple veneer panels were determined. The factors investigated were face veneer thickness and preparation, lathe-‐check orientation, adhesive and core type. An efficient, automated, optical technique based on digital image correlation principles was developed and used to detect and measure checks as they develop. The novel new method for characterizing check severity and development was effective in efficiently measuring checking for a substantial number of samples. The results of the factor screening analysis reveal intricate four way interactions between factor levels contribute to check development, and that some combinations are likely to exhibit much more checking than others. / Graduation date: 2013 Plywood checking maple sugar maple check development optical method digital image correlation Tweedie distribution Tweedies compound Poisson distribution hardwood plywood hardwood plywood manufacturing adhesives core material lathe checks lathe check orientation Veneers and veneering Maple -- Cracking Maple -- Defects Plywood -- Cracking Plywood -- Defects Hardwoods -- Cracking Hardwoods -- Defects

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