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Low resolution CT scanning for aspen log sorting

https://library.fpinnovations.ca/en/permalink/fpipub5611
Author
Schajer, G.S.
Szathmary, G.
Date
August 2006
Edition
37829
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Schajer, G.S.
Szathmary, G.
Date
August 2006
Edition
37829
Material Type
Research report
Physical Description
25 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Systems
Sorting
Simulation
Scanning
Scanning electron microscopy
Scanners
Populus
Logs
Grading
Aspen
Series Number
W-2417
Location
Vancouver, British Columbia
Language
English
Abstract
The potential usefulness of X-ray CT scanning as a means of grading aspen logs is investigated. This work is important because logs that can be selected for lumber or veneer production have much higher value than those for OSB chips. X-ray data from an industrial-style scanner using only three measurement directions is shown to give realistic and stable CT reconstructions of the interior features of aspen logs. Two CT reconstruction schemes are described, specifically tailored to the cylindrical geometry of logs. These have annular and sector-shaped geometries, and they effectively reduce the dimensionality of the measurement task from three dimensions to two. This is the key feature that enables credible CT reconstructions to be created from very modest amounts of data, less than 1% of those used by typical medical-style scanners. Although they give much less resolution of fine detail, the two CT reconstructions are still able to identify the main physical freatures that control log grading, such as knots, rot and heartwood/sapwood regions. The much smaller amount of data to be measured and processed enables an industrial-style scannner to operate in real time, which is an essential feature for practical use.
Scanning Systems
Scanners, Electronic
Logs - Sorting
Populus - Grading
Computer simulation
Documents
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Strategic program area on design and processes - Improve the value chain : project 2 - Log sorting strategies for Aspen

https://library.fpinnovations.ca/en/permalink/fpipub37774
Author
Goudie, D.
Date
March 2005
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Goudie, D.
Contributor
Alberta Science and Research Authority
Date
March 2005
Material Type
Research report
Physical Description
18 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Value added
Utilization
Populus utilization
Populus
Logs
Grading
Aspen
Alberta
Series Number
W-2237
Location
Vancouver, British Columbia
Language
English
Abstract
Although significant volumes of Alberta's trembling aspen resource are being used for pulp and for oriented strand board production, the species can be accurately referred to as "under-utilized" with respect to the production of solid wood products. It is well documented that the aspen's external indicators of quality correlate poorly with internal characteristics, making it particularly difficult to identify suitable sawlogs. This means that the greatest challenge around cutting aspen into solid wood products continues to be the identification of logs that are of suitable quality. This report details the development of an experimental log grade rule for use when evaluating aspen logs. The rule was developed to more accurately segregate those aspen logs that can be profitably cut to high-valued solid wood products from those more suitable for conversion to oriented strand board or pulp. In the first phase of the study, three samples each consisting of thirty logs that met the revised criteria were sawn, and lumber grade yields were calculated. Although the results were encouraging, it was recognized that larger samples needed to be evaluated. To this end, in the second phase, additional, larger samples were sawn, and grade yields again determined. Test results from the second samples largely replicate the first samples and show that logs that meet the revised criteria will more consistently yield high grades of lumber. The question of available volumes of the experimental log grade is also an important one. This report describes evaluations of aspen logs in inventory at three large manufacturing facilities in Alberta. It is inferred that between 1.5% and 3.5% of the log volume in sampled inventories meet the criteria for new log grade. Recommendations for follow up work include: detailed case studies that consider all of the economics of building and operating an aspen grade mill; a more comprehensive analysis of harvested volumes of aspen in order to more accurately estimate the available volumes of sawlogs meeting the standards for the new log grade rule; an analysis of the costs and benefits of using x-ray scanning technology to sort out aspen sawlogs from those more suitable for pulp or oriented strand board production; and an analyis of remanufacturing opportunities based on estimated yields of cuttings from the experimental log grade.
AFRI - AFRI-711G-05 pertaining to Populus - Utilization; Value added - Alberta; Grading - Logs
Documents
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Investigation on air permeability of aspen veneer and glueline

https://library.fpinnovations.ca/en/permalink/fpipub5581
Author
Wang, Brad J.
Zhou, X.
Dai, Chunping
Date
April 2004
Edition
37695
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, Brad J.
Zhou, X.
Dai, Chunping
Date
April 2004
Edition
37695
Material Type
Research report
Physical Description
27 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer manufacturing
Veneer gluing
Veneer
Populus
Gluing
Aspen
Series Number
3901
W-2051
Location
Vancouver, British Columbia
Language
English
Abstract
In this study, we conducted systematic experiments on air permeability of aspen veneer and glueline in terms of panel compression ratio (or applied platen pressure), degree of glue cure (or pressing time), veneer type (sapwood or heartwood veneer) and glue spread level. We also compared the air permeability data of aspen veneer and veneer-ply (2-ply veneer panel) to aspen solid wood and aspen oriented strandboard (OSB). Based on this study, the following conclusions were drawn: For laminated veneer lumber (LVL) and plywood panels, the compression ratio is the most important factor affecting the panel permeability, followed by veneer type (sapwood or heartwood veneer), glue spread and degree of glue cure (or pressing time). The air permeability of the glueline decreases in the course of glue curing; however, its order of magnitude remains the same as that of uncured glue. The reduction in panel permeability mainly results from small densification of each veneer ply instead of the sealing effect of the glueline. Therefore, during LVL/plywood hot-pressing, the glueline does not serve as a main barrier to the gas and moisture movement as commonly speculated. However, due to the substantial change in the magnitude of panel permeability merely within a 5% compression ratio, the convection effect on heat and mass transfer is considered to be very limited. The air permeability of sapwood veneer is about twice that of heartwood veneer without compression. However, with compression, the air permeability of heartwood veneer drops much faster than that of sapwood veneer. The permeability of a sapwood veneer panel is 5.5 ~ 7.0 times higher than that of a heartwood veneer panel merely with a compression ratio in the range of 2.5% ~ 5%. In practice, it implies that 1) panels made from sapwood veneer are more treatable with preservatives; and 2) by controlling panel permeability through veneer incising, proper panel lay-up and densification, mills could reduce blows/blisters during hot-pressing. The air permeability of aspen wood or veneer is not affected by wood density. The air permeability of aspen LVL/plywood panels is 1.5~ 2 times larger than that of aspen solid wood due to the existence of lathe checks, but is significantly lower than that of aspen OSB at the same density level of the panel. On average, commercial LVL/plywood panels have almost the same magnitude of air permeability as commercial OSB. However, due to the absence of voids and small horizontal density variation, LVL/plywood panels will be less permeable than OSB.
Populus - Veneers
Veneers - Manufacture - Tests
Veneers - Gluing
Documents
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Strategic program area on design and processes - Improve the value chain : project 2 - Log sorting strategies for Aspen

https://library.fpinnovations.ca/en/permalink/fpipub37793
Author
Goudie, D.
Date
March 2004
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Goudie, D.
Contributor
Alberta Science and Research Authority
Date
March 2004
Material Type
Research report
Physical Description
10 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Value added
Utilization
Populus utilization
Populus
Logs
Grading
Aspen
Alberta
Series Number
W-2288
Location
Vancouver, British Columbia
Language
English
Abstract
One of the major constraints to the growth and development of a value-added sector for trembling aspen in the solid wood industry concerns the inherent variability in quality of the resource. Much of the resource is simply not suitable for the extraction of lumber grades required to service markets for higher valued wood products, and those logs that are suitable for grade extraction are often difficult to identify. Recent market research details an interest in higher valued grades of aspen, particularly in Asia. On the basis of that market research it is worth investigating the predictive value of an alternative system of identifying aspen logs well suited for the production of high-grade lumber. This report details the conception and application of an experimental log grade rule for use when evaluating samples of aspen logs. The rule is intended specifically to separate high valued aspen sawlogs from those more suitable for conversion to oriented strand board or pulp. The log grading system presently used to evaluate most hardwood logs that are graded, one developed by the United States Forest Service, has been shown to do a poor job in estimating the value of aspen logs. The new log grade rule was based on the existing system, which was modified slightly to reflect some inherent characteristics of aspen. Three samples each consisting of thirty logs that met the revised criteria were evaluated. Test results reported here show that logs that meet the revised criteria will more consistently meet higher grades of lumber; however, more work must be done to confirm the predictive value of the new rule. In addition the issue of available volumes of logs meeting the revised criteria must be addressed.
AFRI - AFRI-700VA-03 pertaining to Populus - Utilization; Value added - Alberta; Grading - Logs
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Manufacture of LVL and plywood from short rotation hybrid poplar

https://library.fpinnovations.ca/en/permalink/fpipub49648
Author
Knudson, Robert M.
Wang, Brad J.
Date
April 2002
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Knudson, Robert M.
Wang, Brad J.
Date
April 2002
Material Type
Research report
Physical Description
97 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer
Utilization
Populus utilization
Populus
Plywood manufacture
Plywood
Laminate product
Aspen
Series Number
W-1863
Location
Vancouver, British Columbia
Language
English
Abstract
As increasing volumes of short-rotation hybrid poplar reach maturity, various sectors of the composites wood products industry have shown an interest in their potential as substitutes for aspen or other low-density species. Veneer manufacturers were particularly curious of the suitability of these hybrids for the manufacture of laminated veneer lumber (LVL) and plywood. This study was designed to provide some guidance to Forintek members.
Documents
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Characterizing aspen veneer for LVL/plywood products. Part 1. Stress grades of veneer|Characterizing aspen veneer for LVL/plywood products

https://library.fpinnovations.ca/en/permalink/fpipub1157
Author
Wang, Brad J.
Date
July 2001
Edition
37589
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, Brad J.
Date
July 2001
Edition
37589
Material Type
Research report
Physical Description
14 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer manufacturing
Veneer
Populus
Plywood manufacture
Plywood
Laminate product
Aspen
Series Number
W-1791
Location
Vancouver, British Columbia
Language
English
Abstract
In this work, the properties of aspen veneer from two mills (A and B) were compared. The comparisons between the incised veneer and non-incised veneer for mill A were made in terms of veneer thickness, ultrasonic propagation time (UPT), density and MOE. The aspen veneer was further characterized for LVL/plywood products by tailoring veneer grades to the requirements of final veneer products. In addition, MOE-based veneer stress grading and UPT-based veneer stress grading were compared for the aspen veneer. The advantages of MOE-based veneer stress grading over UPT-based veneer stress grading were identified in terms of veneer grade MOE and volume breakdown. The main results are summarized as follows: 1) Aspen veneer properties change from mill to mill. The differences in aspen veneer density and MOE between mill A and B are significant with mill A producing denser and stronger aspen veneer. 2) For aspen veneer in the mill A, the distribution shapes of veneer thickness, UPT, density and MOE between the non-incised and incised veneer are quite similar. Although the differences in veneer thickness, UPT and density between the non-incised veneer and incised veneer are identified as significant, the difference in veneer MOE is not significant due to the effect of both veneer UPT and density. The incised veneer has a slightly higher variation in thickness and is also slightly thicker compared to the non-incised veneer. This could due to the change of lathe settings or the property variation of aspen species as indicated with the veneer density variation. 3) Of the aspen veneer from mill A, using the optimum UPT thresholds, about 27.5 ~ 30.9% can be extracted through veneer stress grading to make 2.0 million psi LVL; about 43.4 ~ 59.9% can be sorted out for 1.8 million psi LVL; and the remaining 12.6 ~ 25.7% can be used for 1.5 million psi LVL or for plywood. It was also found that the incised aspen veneer generates 3.4% less of top stress grade G1 but 16.5% more of stress grade G2 compared to the non-incised aspen veneer if performing the optimum UPT-based stress grading. 4) The MOE-based veneer stress grading not only results in a smaller variation in MOE of each grade, but also higher volume percentages of stress grades G1 and G2 compared to the UPT-based veneer stress grading. This smaller variation in MOE of each stress grade will be very beneficial to the industry and structural applications since higher design stress can be assigned for the wood structural components. Also the higher percentages of stress grades G1 and G2 with the MOE-based veneer stress grading has significant economical implications and should be recognized by the industry. 5) To maximize mill profits, veneer sheets need to be periodically sampled and analyzed using the VGrader software. The optimum grading thresholds for the specific veneer can be established for on-line veneer stress grading based on the current market and requirements of final veneer products, providing a real solution to characterize and make best use of the specific veneer for LVL/plywood products.
Veneers - Manufacture - Tests
Populus - Veneers
Plywood - Manufacture
Lumber, Laminated veneer - Manufacture
Documents
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Characterizing aspen veneer for LVL/plywood products. Part 2. LVL pressing strategies and strength properties|Manufacturing characteristics and strength properties of aspen LVL using stress graded veneer

https://library.fpinnovations.ca/en/permalink/fpipub1158
Author
Wang, Brad J.
Date
August 2001
Edition
37590
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, Brad J.
Date
August 2001
Edition
37590
Material Type
Research report
Physical Description
41 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer manufacturing
Veneer
Mechanical properties
Populus
Laminate product
Aspen
Series Number
W-1792
Location
Vancouver, British Columbia
Language
English
Abstract
In this study, aspen veneer sheets were sampled from a Forintek member mill. Their attributes and properties were measured. Using the optimum stress grading strategy, aspen veneer was segregated into 3 distinct stiffness groups (stress grades G1, G2 and G3) and conditioned to 3 different moisture levels. An experimental design for 3-level four factors comprising veneer moisture content, veneer stress grade, mat pressure and glue spread (or resin level) was adopted. Based on the experimental design, LVL panels with different combinations of four factors were pressed until the target core temperature reached 1050C to achieve full cure followed by a stepwise decompression cycle. The LVL panel final thickness, density, compression ratio and relevant strength properties were measured. After that the effect of aspen veneer moisture, stress grade, mat pressure and glue spread and their relative importance on LVL compression behavior, hot-pressing and strength properties were evaluated using a statistical analysis program. The relationship between LVL panel properties and veneer properties was examined. Finally a method to enhance LVL modulus of elasticity (MOE) to make high stiffness LVL was discussed. From this study, the following results were found: Aspen veneer is capable of making LVL products meeting 1.8 and 2.0 million psi MOE requirements. Optimum veneer stress grading and proper pressing schedule are two important keys to the manufacture of high-stiffness aspen LVL products. Further, a possibility to make high-grade aspen LVL meeting 2.2 million psi MOE exists by proper veneer densification and optimum veneer stress grading. The roles of four factors affecting LVL pressing behavior and strength properties are quite different. Glue spread and mat pressure, rather than stress grade and veneer moisture content, are two main factors affecting hot-pressing time taken for the core to reach 1050C. With incised veneer, the moisture from the glue in the glueline affects the rise of core temperature more pronouncedly than the moisture in the veneer, and is more critical to the cure of the glue. High glue spread (44 lbs/1000ft2) not only significantly increases the hot pressing time taken for the core to rise to 1050C, but overall also decreases most LVL strength properties with the pressing schedule used. High mat pressure does not necessarily result in high LVL panel compression due to the high gas pressure that occurs in the core. Veneer stress grade and veneer moisture are the two predominant factors that mostly affect LVL strength properties. LVL panels assembled with high stress grade result in increases in both flatwise and edgewise MOE and MOR properties rather than shear strength either longitudinal or through-the-thickness. Further, using high stress grade veneer can help make more efficient structural systems in terms of both stiffness-to-weight and bending strength-to-weight ratios compared to using low stress grade veneer. High veneer moisture at 6% impairs all LVL strength properties except edgewise bending MOE. LVL compression ratio can help link veneer MOE with LVL panel edgewise bending MOE. Overall, every increase of 1% in LVL compression ratio would result in 1% increase in LVL and veneer MOE ratio. With regard to aspen LVL MOE enhancement, using high veneer stress grade gains slightly less than using low veneer stress grade. On average, every increase of 1% in aspen LVL compression ratio results in 0.82%, 1.05% and 1.20% increase in aspen LVL and veneer MOE ratio assembled with stress grades G1, G2 and G3, respectively. In practice, those conversion factors for any specific veneer can be derived based on the correlation between veneer MOE and MOE of target LVL/plywood products made with proper pressing schedules, and be further used to derive requested veneer MOE for each stress grade to perform the optimum veneer stress grading. Pressing schedules show significant effect on aspen LVL compression behavior and strength properties. Using a pressing schedule with step-wise decompression cycles following the core temperature to rise to 1050C, an excessive compression of LVL in the range of 13.5% to 27.6% is generated which results in high-stiffness LVL with an average MOE of approximate 2.0 million psi for all experiments. Although this pressing schedule has slightly longer pressing time and off-target LVL thickness than current commercial LVL pressing schedules, it helps enhance the strength properties of LVL. It is recommended that further work should include the effect of different decompression cycles and mat pressure on LVL panel compression ratio and strength properties.
Populus - Veneers - Strength
Veneers - Manufacture - Tests
Lumber, Laminated veneer - Manufacture
Documents
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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
Documents
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Optimized laminating of seven B.C. species

https://library.fpinnovations.ca/en/permalink/fpipub37570
Author
Troughton, G.E.
Andersen, Axel W.
Date
March 2001
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Troughton, G.E.
Andersen, Axel W.
Contributor
Forest Renewal BC.
Date
March 2001
Material Type
Research report
Physical Description
15 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Second growth
Pseudotsuga menziesii
Pseudotsuga
Populus tremuloides
Populus
Pinus contorta
Pinus
Picea
Larix
Laminate product
Growth
British Columbia
Betula
Aspen
Series Number
W-1753
Location
Vancouver, British Columbia
Language
English
Abstract
Seven B.C. species, namely, interior Douglas fir, coastal second growth Douglas fir, western larch, lodgepole pine, western white spruce, trembling aspen and white birch were evaluated for their laminating properties using different adhesive formulations and pressing conditions. Using optimized gluing and pressing conditions, six of the B.C. species showed excellent bond quality when laminating with radio-frequency (RF) heating and either cross-linked polyvinyl acetate (PVAC) or phenol-resorcinol-formaldehyde (PRF) adhesive. These laminates easily passed the shear block wood failure requirement in the ASTM-D-2559 standard and the delamination requirement in the ASTM-D-1101 standard. Because white birch which has a high density showed the highest block shear strengths for the optimum PRF adhesive formulation, this species showed the lowest average percent wood failure of the seven B.C. species and did not meet the ASTM-D-2559 wood failure requirement of 75%. Using conventional platen pressing at 20 or 25°C, laminates were prepared with different PRF adhesive formulations and the seven B.C. species. Using an optimized PRF adhesive formulation, the laminates for the seven BC species met the above ASTM standard requirements for wood failure and delamination. Overall, the percent wood failure was higher for the laminates made at 25°C indicating more resin cure. Hence, for laminates made with the optimum PRF formulation, PRF-C, the average percent wood failure for western larch at 20°C was 78% compared to 98% at 25°C.
Laminated products - Manufacture - British Columbia
Pseudotsuga menziesii
Larix occidentalis
Pinus contorta Dougl. var. latifolia
Picea glauca
Populus tremuloides
Betula papyrifera
Second growth
Documents
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Modelling of drying rates in aspen logs during storage

https://library.fpinnovations.ca/en/permalink/fpipub41889
Author
Brunette, Gilles G.
Date
April 1999
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Brunette, Gilles G.
Date
April 1999
Material Type
Research report
Physical Description
7 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Simulation
Seasoning
Logs
Aspen
Location
Sainte-Foy, Québec
Language
English
Abstract
Log Yard
Management
Seasoning - Computer simulation
Aspen
Documents
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Optimization of peeling of aspen veneer using a 5/8" rotary bar

https://library.fpinnovations.ca/en/permalink/fpipub5522
Author
Dai, Chunping
Wong, J.
Date
August 1996
Edition
37420
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Dai, Chunping
Wong, J.
Date
August 1996
Edition
37420
Material Type
Research report
Physical Description
10 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer manufacturing
Veneer cutting
Veneer
Populus
Aspen
Series Number
W-1332
Location
Vancouver, British Columbia
Language
English
Abstract
As a result of its fast growth and abundant availability, aspen has become an increasingly important commercial wood species in the production of oriented strand board (OSB) and veneer-based composites such as laminated veneer lumber (LVL). The purpose of the study described in this report was to determine the effect of conditioning temperature on veneer quality using a 5/8" roller bar, and to determine the optimum bar gaps based on results from previous Forintek studies on aspen veneer peeling.
Veneers - Manufacture
Populus - Veneers
Veneers - Cutting, Rotary
Documents
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Optimization of the flaking operation : phase I : aspen resource parameters

https://library.fpinnovations.ca/en/permalink/fpipub41745
Author
Grant, D.R.
Date
June 1996
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Grant, D.R.
Date
June 1996
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Optimization
Operations
Aspen
Series Number
E-2917
Location
Sainte-Foy, Québec
Language
English
Abstract
Optimization
Flaking
Operation
Aspen
Documents
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Accelerated aging and outdoor weathering of aspen waferboard

https://library.fpinnovations.ca/en/permalink/fpipub4743
Author
Alexopoulos, J.
Date
March 1991
Edition
41549
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Alexopoulos, J.
Date
March 1991
Edition
41549
Material Type
Research report
Physical Description
39 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Alberta
Manitoba
Saskatchewan
Waferboards
Utilization
Aspen
Aging
Series Number
Forestry Canada No. 1
E-1235
Location
Ottawa, Ontario
Language
English
Abstract
Waferboard
Aspen - Utilization
Waferboard - Aging
Documents
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Utilization of hardwoods in northern British Columbia

https://library.fpinnovations.ca/en/permalink/fpipub36869
Author
Middleton, G.R.
Date
March 1990
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Middleton, G.R.
Date
March 1990
Material Type
Research report
Physical Description
36 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Utilization
Populus utilization
Populus
Hardwoods
Aspen
Series Number
Forestry Canada No. 32A
contract no.1214K009
W-758
Location
Vancouver, British Columbia
Language
English
Abstract
Summary included
Hardwoods - Utilization
Populus - Utilization
Documents
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Effect of knife angles and wood conditions on the cutting of Aspen wafers with a disc-type waferizer

https://library.fpinnovations.ca/en/permalink/fpipub38388
Author
Pfaff, Frank
Date
March 1990
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Pfaff, Frank
Date
March 1990
Material Type
Research report
Physical Description
10 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Aspen
Angle
Series Number
CFS project no.39
3812M402
E-1175
Location
Ottawa, Ontario
Language
English
Abstract
Knife angles
Aspen wafers
Documents
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Plywood/LVL from short aspen veneer

https://library.fpinnovations.ca/en/permalink/fpipub38337
Author
Hsu, W.H.E.
Date
March 1989
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hsu, W.H.E.
Date
March 1989
Material Type
Research report
Physical Description
13 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer
Plywood
Laminate product
Aspen
Series Number
3843M403
E-1081
Location
Ottawa, Ontario
Language
English
Abstract
Aspen - Laminated Veneer Lumber
Aspen - Plywood
Documents
Less detail

Status of Balsam (Black) poplar utilization in waferboard/OSB production : summary report

https://library.fpinnovations.ca/en/permalink/fpipub38354
Author
Pfaff, Frank
Date
March 1988
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Pfaff, Frank
Date
March 1988
Material Type
Research report
Physical Description
20 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Utilization
Populus
Balsam
Aspen
Location
Ottawa, Ontario
Language
English
Abstract
Populus balsamifera - Utilization
Balsam Poplar - Utilization
Documents
Less detail

Laminated veneer lumber from aspen

https://library.fpinnovations.ca/en/permalink/fpipub38222
Author
Hsu, W.H.E.
Date
March 1988
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hsu, W.H.E.
Date
March 1988
Material Type
Research report
Physical Description
33 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer
Sample
Laminate product
Aspen
Series Number
CFS project no.26
Project no.3812L204
E-762
Location
Ottawa, Ontario
Language
English
Abstract
Laminated veneer lumber (LVL)
Aspen - Laminated Veneer Lumber
Documents
Less detail

Laminated veneer lumber from aspen

https://library.fpinnovations.ca/en/permalink/fpipub38766
Author
Hsu, W.H.E.
Date
February 1988
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hsu, W.H.E.
Date
February 1988
Material Type
Research report
Physical Description
32 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer
Utilization
Populus
Sample
Laminate product
Aspen
Location
Ottawa, Ontario
Language
English
Abstract
Laminated veneer lumber (LVL)
Aspen - Laminated Veneer Lumber
Aspen - Utilization
Populus
Documents
Less detail

Laminated veneer lumber from aspen

https://library.fpinnovations.ca/en/permalink/fpipub38179
Author
Hsu, W.H.E.
Date
March 1987
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hsu, W.H.E.
Date
March 1987
Material Type
Research report
Physical Description
34 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer
Utilization
Populus
Sample
Laminate product
Aspen
Series Number
CFS project no.25
Project no.3812204
E-587
Location
Ottawa, Ontario
Language
English
Abstract
Laminated veneer lumber (LVL)
Aspen - Laminated Veneer Lumber
Aspen - Utilization
Populus
Documents
Less detail

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