Abstract: Wood-based composites, and methods for their manufacture, are provided. The composites include oriented wooden strands and cured bonding resin connecting adjacent strands. The composites are relatively low-density, having an average dry density of the wooden composites of about 15-28 pounds per cubic foot (pcf). The unique composition of the composites provide improved structural and insulating (thermal and acoustic) properties when compared to traditional engineered wood products (e.g., oriented strandboard).
Type:
Grant
Filed:
August 13, 2012
Date of Patent:
September 13, 2016
Assignee:
Weyerhaeuser NR Company
Inventors:
Jack G. Winterowd, Glen Robak, Travis E. Bjorkman
Abstract: A method of sinuglating embryos is provided. The method includes providing a plurality of embryos (40) within a system (20) and sensing (34) at least one of the plurality of embryos in a fluid. The method also includes dispensing (26) at least one of the plurality of embryos on a surface (28).
Abstract: Methods for interplanting a primary crop and an energy crop include preparing a plantation site for planting the energy crop. Plantation sites may include a primary crop planted in a first row and in a second row, the first row being separated by an intermediate area. The intermediate area is divided into a center portion and two side portions (a first side portion and a second side portion). Methods include lifting a soil and plantation debris mixture from the intermediate area, and redepositing a soil component of the soil and plantation debris mixture primarily in the intermediate area.
Abstract: A composition comprising 10 to 50 wt % wood pulp fiber and 45 to 85 wt % thermoplastic polymer wherein the average dispersion of the fibers within the thermoplastic polymer composition is equal to or greater than 90% as determined by the Dispersion Test. The pulp can be bleached chemical wood pulp fiber.
Type:
Grant
Filed:
September 27, 2012
Date of Patent:
May 3, 2016
Assignee:
Weyerhaeuser NR Company
Inventors:
Robert T. Hamilton, Harshadkumar M. Shah, Jeffrey J. Cernohous, Neil R. Ganlund, David E. Fish
Abstract: Carboxylated, mercerized cellulose fiber having at least 12 meq/100 g of carboxyl substitution at the C-6 position of the anhydroglucose units, which includes at least 20% cellulose II, may be produced by catalytically carboxylating mercerized cellulose fiber in at least two catalytic carboxylation stages in a continuous series in which the pH is adjusted, and a primary oxoammonium salt catalyst (or precursor thereof) and secondary oxidant is added, at the beginning of each stage. Optionally, the carboxylated, mercerized cellulose may be made substantially free of aldehyde groups by means of a stabilizing step following the final carboxylation stage, in which aldehyde groups present in the fibers are converted to carboxyl groups.
Abstract: The present disclosure provides colored compositions formulated to provide water repellency and crocking resistance when applied as a coating to a surface (e.g., the surface of a wood product). The compositions include a colored pigment, a wax emulsion, a latex polymer, and a halogenated phosphate ester. Wood products treated with the composition, as well as methods for applying the composition to a surface, are also provided.
Type:
Grant
Filed:
October 18, 2013
Date of Patent:
January 5, 2016
Assignee:
Weyerhaeuser NR Company
Inventors:
Erik M. Parker, Jack G. Winterowd, Glen Robak
Abstract: A computer system for creating artifact-free aerial images of a region of interest. A computer system receives one or more input aerial images that are obtained at different times. A false-color image is created by applying two or more of the input aerial images to different color channel inputs of the false-color image. Based on the color of the pixels in the false-color image, pixels in the two or more input aerial images are classified as representing clear, cloud or shadow areas. An output image is created by combining pixels that are classified as representing clear areas from two or more of the input aerial images.
Abstract: A mixture of lyocell fiber and low DP or standard DP cellulose pulp fiber having a Canadian Standard Freeness of 250 mL CSF or less is dried and has a Canadian Standard Freeness of 250 mL CSF or less. The pulp is 10% to 75% of the total weight of fibers in the mixture. Both the dried product and the process of making it are disclosed.
Abstract: Esterified cellulose pulp compositions produced in high yield from commercially available wood pulp sources, methods for making the esterified cellulose pulp compositions, and articles prepared from the esterified cellulose pulp compositions.
Abstract: A cellulose pulp sheet is provided that is formed from never-dried kraft pulp and fibrillated fibers, such as lyocell. The pulp sheet provides several beneficial features as a result of both the use of fibrillated fibers and never-dried kraft pulp, particularly when the pulp sheet is used to form air-laid absorbent materials that include superabsorbent polymers.
Type:
Grant
Filed:
June 29, 2012
Date of Patent:
December 15, 2015
Assignee:
Weyerhaeuser NRCompany
Inventors:
Brent A. Petersen, Andrew J. Dodd, Andre S. Hajnal, Noriko Suzuki
Abstract: A method of managing timberland to optimize the plot growth rate for a plot including a softwood tree crop and an energy crop generally includes planting a softwood tree crop in adjacent first and second rows, wherein the softwood tree crop has a tree spacing between adjacent trees and a row spacing between the first and second rows, planting an energy crop in the row spacing, wherein the energy crop is a regenerating lignocellulosic energy crop, and periodically measuring the plot growth of the softwood tree crop and the energy crop. A method of managing timberland to optimize the total plot volume of a softwood tree crop and an energy crop generally includes periodically measuring the total plot volume of the softwood tree crop and the energy crop.
Type:
Grant
Filed:
January 24, 2014
Date of Patent:
October 27, 2015
Assignee:
Weyerhaeuser NR Company
Inventors:
Fred H. Bigelow, Howard Duzan, Venkatesh H. Kumar, Robert F. Lowery
Abstract: The invention relates to a process for preparing a composition comprising 10 to 45% of the total solids weight lignin, polyacrylonitrile or a polyacrylonitrile copolymer, and a solvent to form a lignin-based polyacrylonitrile-containing dope and the resulting products. The dope can be processed to produce fibers, including precursor, oxidized and carbonized fibers. The oxidized fibers are of value for their flame resistant properties and carbonized fibers are suitable for use in applications requiring high strength fibers, or to be used to form composite materials.
Abstract: A processor-based apparatus for computing stream vectors for an area of interest divides the area of interest into a number of hydrologic unit code (HUC) areas. The processor calculates stream vectors from lower resolution digital elevation map (DEM) data. For those HUC areas where higher resolution DEM data is available, the processor merges the lower resolution and higher resolution DEM data. Stream vectors are calculated from the merged DEM data and used to replace those stream vectors calculated from the lower resolution DEM data. Attributes of stream vectors that receive upstream flow from an adjacent HUC area are corrected.
Abstract: A pick-up and delivery system including a pick-up assembly and a delivery assembly. The pick-up assembly includes a robotic arm, a pick-up device rotatably mounted on the robotic arm, and a first vacuum pressure supply port operably connected to the pick-up device. The delivery assembly includes an insertion device and a second vacuum pressure supply port. The insertion device may include an insertion member and a release assistance rod arranged inside the insertion member. The release assistance rod is moveable between an extended position and a retracted position. When the release assistance rod is in the extended position, a proximal end extends beyond an end of the insertion member. Further aspects are directed towards methods for grasping and releasing an object with a pick-up and delivery system.
Type:
Grant
Filed:
June 20, 2014
Date of Patent:
August 25, 2015
Assignee:
Weyerhaeuser NR Company
Inventors:
Fredrick T. Rubatino, Michael W. Teodoro
Abstract: In the process of forming a wood pulp fiber and thermoplastic polymer composition the step of decreasing the exit area of the mixing device to 40 to 60% of the cross-sectional area of the mixing device.
Abstract: In the process of forming a wood pulp fiber and thermoplastic polymer composition the step of adding mineral oil to the composition during mixing.
Abstract: Liquid kraft lignin compositions, methods of their production, and various methods of their use, including in preparing kraft lignin-containing LPF resins, which may in turn be used in producing OSB or other wood-based composites, and methods of assaying lignin content in such compositions, are disclosed. In an illustrative and non-exclusive embodiment, a liquid kraft lignin composition includes water in the amount of about 60-95% by weight, urea about 5-30% by weight, a group 1 alkaline metal hydroxide about 0.5-3.0% by weight, and kraft about 5-25% by weight on a dry basis.