Although sapwood of pine species is generally considered to be readily treated with preservatives, penetration is sometimes variable. The cause of this variability is poorly understood. This study evaluated the effect of geographic source, method of drying, and treatment parameters on penetration…
Keywords: Red pine, sapwood, preservative penetration, geographic source, drying method, treatment schedule, wood anatomy, lumber drying, wood moisture, red pine, pine drying, drying, wood preservatives, moisture content, penetration, drying schedules, Pinus resinosa, red pine, preservatives, preservative treatments
Source: Proceedings, one hundred second annual meeting of the American Wood Preservers' Association ... Austin, Texas, April 9-11, 2006, volume 102. Birmingham, Ala. : American Wood Preservers' Association, 2006: pages 39-43.
High moisture content, flat sawn Japanese cedar (Cryptomeria japonica D. Don) veneer was compressed using a roller press to mechanically remove water. The amount of water removed depended on the amount of compression applied. At 60% compression, 400 kg/m3 of water was removed. The process was not…
Keywords: Veneers, veneering, moisture, drying, Cryptomeria japonica, cedar, bending strength, compression, roller pressing, strength
Source: Journal of wood science. Vol. 50 (2004): p. 479-483.
The effect of increased fiber charge on refining, cationic starch adsorption, and hornification was examined. Two pulps were investigated: (1) a softwood (SW) kraft pulp (KP) which was bleached elementally chlorine-free (ECF) and sewed as control; and (2) a control pulp treated with alkaline…
Keywords: atomic force microscopy, carboxyl, cationic starch, drying, fiber charge, hornification, peroxide, refining, tensile, wet-end
Source: Holzforschung, Vol. 61: 451-458
“Pacific madrone (Arbutus menziesii Pursh) is a moderate-sized hardwood tree found in the Pacific coastal country from British Columbia to southern California. In California it also grows in the western Sierra Mountains below 4,000 feet elevation. The tree is also known as madrono and madrona. It…
Keywords: Veneers, cutting, drying, fuelwood, fence posts, charcoal, lumber, warping, Pacific Coast, madrono, madrona, collapse
Source: Research note FPL no. 094. Madison, WI : USDA, Forest Service, Forest Products Laboratory. 7 pages.
Moisture gradient in wood and wood composites is one of most important factors that affects both physical stability and mechanical performance. This paper describes a method for measuring moisture gradient in lumber and engineering wood composites as it varies across material thickness. This…
Keywords: Wood drying, drying, wood defects, defects, wood moisture, moisture, composite materials, X-rays, nondestructive testing, wood density, density, dimensional stability, moisture content, hygroscopicity
Source: Forest products journal. Vol. 58, nos. 7/8 (July/Aug. 2008): pages 41-45.
Wood is a hygroscopic material which contains water in varying amounts, depending upon the relative humidity and temperature of the surrounding atmosphere. Equilibrium conditions are established as shown in Table 6.7.1. The standard reference condition for wood is oven-dry weight, which is…
Keywords: Specific gravity, elasticity, wood drying, drying, mechanical properties, moisture, humidity, temperature, moisture content, strength, swelling, shrinkage, fiber-saturation point, green lumber, equilibrium moisture content, physical properties, hygroscopicity
Source: Marks' standard handbook for mechanical engineers. New York : McGraw Hill: ISBN: 0071428674: 9780071428675: pages 6.116-6.121.
Yellow-poplar was dried as 7/4 flitches at high temperatures and subsequently ripped into studs to meet National Grading Rule Standards for STUD grade. The effects of growth stresses in these flitches from smaller logs appear to be minimized by this process. Dry bulb temperatures from 235° to 295°…
Keywords: Yellow poplar, flitches, drying, high-temperature drying
Source: Res. Pap. FPL-RP-365. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 4 pages
Traditional hardwood lumber drying processes were developed for appearance-type products such as furniture, cabinetry, and millwork. This means that air-drying practices were managed to minimize the chemical and fungal stains that occur in white woods such as maple, as well as surface checking that…
Keywords: Hardwoods, heat treatment, drying, lumber, maple, pest control, sterilization, wood moisture, heating time, moisture content, drying schedules, air drying, kiln drying, heat sterilization
Source: Undervalued hardwoods for engineered materials and components. Madison, WI : Forest Products Society ; Marquette, MI : Northern Initiative, [c2005]: Pages 51-63.
This study evaluated the potential of acoustic analysis as presorting criteria to identify warp-prone boards before kiln-drying. Dimension lumber, 38 by 89 mm (nominal 2 by 4 in.) and 2.44 m (8 it) long, sawn from open-grown small-diameter ponderosa pine trees, was acoustically tested lengthwise at…
Keywords: Green board, warp, presort, acoustic speed, rate of wave attenuation, acoustic modulus of elasticity, lumber moisture, acoustic properties, elasticity, lumber drying, drying, nondestructive testing, moisture content, acoustic speed, small-diameter timber, smallwood, ponderosa pine, kiln drying, modulus of elasticity, warping
Source: Wood and fiber science. Vol. 38, no. 2 (2006): pages 206-214.
Characteristics of microwave drying of wood strands with different initial moisture contents and geometries were investigated using a commercial small microwave oven under different power inputs. Temperature and moisture changes along with the drying efficiency were examined at different drying…
Keywords: Microwave drying, wood strand, temperature, moisture content, energy efficiency, extractives, energy consumption, particle board, drying, microwave heating, volatile organic compounds, wood extractives, drying schedules, oriented strandboard, OSB, wood fibers
Source: Drying technology. Vol. 23 (2005): pages 1-16.