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Effect of resin application sequence, content, and powder/liquid combination ratio on OSB performance

https://library.fpinnovations.ca/en/permalink/fpipub42314
Author
Wang, Xiang-Ming
Wan, Hui
Date
July 2005
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, Xiang-Ming
Wan, Hui
Date
July 2005
Material Type
Research report
Physical Description
43 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Resin
Oriented strandboard
Application
Series Number
General Revenue Project No. 2689
Location
Sainte-Foy, Québec
Language
English
Abstract
Powder and liquid phenol-formaldehyde (PF) combination binder system has been commonly used in North America for oriented strand board (OSB) manufacturing. This binder system has shown its suitability for improving resin efficiency and bond quality as compared with either powder PF (PPF) or liquid PF (LPF) resin. This study was conducted to investigate the effect of resin application sequence (LPF-PPF-LPF, LPF-PPF, PPF-LPF), resin content (3.0%, 5.5%, 8.0%), and PPF/LPF combination ratio (50:50, 65:35, 80:20) on strand board performance. Board properties evaluated include internal bond (IB), thickness swelling (TS), water absorption (WA), dry and wet modulus of rupture (MOR), dry modulus of elasticity (MOE), edgewise shear, and compression shear strength. In addition, a non-destructive test method (TROBEND) developed at Forintek was also used to measure the modulus of elasticity (MOE) and shear modulus of elasticity (G). Response Surface Methodology (RSM) was used in the experiment design. Significant response surface models were established for individual panel properties, including the linear model for IB, dry MOR, dry MOE, and compression shear, as well as the quadric model for TS, WA, and wet MOR, and 2FI (two factor interaction) for edgewise shear. ANOVA for response surface model indicated that the resin content was a significant model term for IB, TS, dry MOR and MOE, wet MOR, and compression shear properties. An increase in resin content improved these board properties. Powder/liquid ratio was a significant model term for TS, WA, and wet MOR. Resin application sequence was not a significant model term for any panel property, but its interaction with resin content was a significant model term for edgewise shear property. In most cases, the interactions between experimental variables were not significant model terms for predicting panel properties, but they still revealed some trends. Regarding Sequence 3 (PPF-LPF), 50:50 PPF/LPF ratio (lower level) resulted in higher IB, dry MOR, and compression shear, while 80:20 PPF/LPF (higher level) yielded lower WA and higher dry MOE. For Sequence 2 (LPF-PPF), 65:35 PPF/LPF ratio (middle level) favoured TS, while 50:50 PPF/LPF ratio (lower level) favoured wet MOR. Sequence 1 (LPF-PPF-LPF) combined with 50:50 PPF/LPF ratio (lower level) also gave lower WA values. In general, an increase in resin content improved the board properties with the above combinations. In addition, Sequence 3 (PPF-LPF), with 3.0% resin (lower level), yielded higher edgewise shear strength regardless of resin application sequence. An attempt was made to correlate the panel mechanical properties measured using both destructive and non-destructive test methods. The strongest correlation was observed between IB and compression shear (R2=0.70), followed by TORBEND G with modulus of elasticity (TORBEND MOE) (R2=0.40), and TORBEND G with compression shear (R2=0.28) and with IB (R2=0.26). However, no correlation seemed to exist between MOE (static bending) and TROBEND MOE. An image analysis indicated that an increase in resin content significantly increased resin coverage on strand surface. At each resin content (3.0%, 5.5%, and 8.0%), a decrease in PPF/LPF ratio in Sequence 1 (LPF-PPF-LPF) or an increase PPF/LPF ratio in sequence 3 (PPF-LPF) seemed to result in higher resin coverage. Resin coverage seemed to correlate to TS (R2=0.45), IB (R2=0.42), compression shear (R2=0.39), TORBEND G (R2=0.39), dry MOR (R2=0.25), wet MOR (R2=0.25), and dry MOE (R2=0.18). However, resin coverage did not seem to correlate to WA, TORBEND MOE, or edgewise shear properties.
Resin application
OSB
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Assessment of various engineered wood parquet flooring construction by FE modelling

https://library.fpinnovations.ca/en/permalink/fpipub5315
Author
Blanchet, P.
Date
March 2003
Edition
42188
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Blanchet, P.
Contributor
Canada. Canadian Forest Service
Date
March 2003
Edition
42188
Material Type
Research report
Physical Description
24 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Testing
Algorithms
Series Number
CFS Value-Added Report 3658
Location
Sainte-Foy, Québec
Language
English
Abstract
Engineered wood flooring (EWF) is gaining in popularity since it appeared in Europe in the 70’s. 40% of the wood flooring installed in the USA is EWF and 75% are EWF in Europe. In layered wood composites such as engineered wood flooring, dimensional stability is of primary importance. The non-homogeneous adsorption or desorption of moisture by the composite may induce cupping, thus decreasing product value. These products were developed by the industry with the result that knowledge on the product and its behaviour is very limited. The objective of this study is to develop a finite element model of the hygromechanical cupping induced by moisture desorption in layered wood composites. The model is based on two sets of equations, 1) the three-dimensional equation of unsteady state moisture diffusion, and 2) the three-dimensional equations of elasticity including an orthotropic Hooke’s law, which takes into account the shrinkage, and swelling of each layer. The model was used to assess 34 different constructions. Results may be used as guideline in the design of new engineered wood flooring construction.
Engineered wood products
Finite element
Models, Mathematical
Floors - Testing
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Representation mathematique des tiges et des billes : rapport final = Softwood log shape modelling with shadow scanners

https://library.fpinnovations.ca/en/permalink/fpipub4764
Author
Mongeau, J.-P.
Date
March 1993
Edition
41574
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mongeau, J.-P.
Date
March 1993
Edition
41574
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Softwoods
Scanning
Logs
Algorithms
Series Number
E-1396
Location
Sainte-Foy, Québec
Language
French
Abstract
This paper describes and evaluates new and existing models for exterior log geometry. Compatibility with 1,2,3, and 4-axis shadow scanners determined which models were selected for evaluation. Models were considered for potential use in sawmilling process simulation and optimization. The accuracy evaluation compared models based upon lost and added fiber percentages. All models tended to overestimate log cross section area. Popular circular and elliptical models provided the poorest accuracy. Elliptical models used with 2-axis or 3-axis scanners generated up to 8% lost fiber and up to 15% added fiber. The 3-axis dyadic and Chaikin models provided the best overall performance : lost fiber under 3.5% and added fiber under 13%. Results from the evaluation recommend a 3-axis scanner system for automatic positioning and breakdown optimization. The small benefit obtained from 4-axis models does not justify their use. Other technologies are recommended where better accuracy is needed.
Softwoods
Log Model
Scanning
Mathematical Representation
Accuracy
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Verification d'un modele mathematique pour la dimension cible des equarris avant le refendage (Mars 1989)

https://library.fpinnovations.ca/en/permalink/fpipub5651
Author
Constantineau, Serge
Morin, M.
Date
March 1993
Edition
38498
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Constantineau, Serge
Morin, M.
Date
March 1993
Edition
38498
Material Type
Research report
Physical Description
15 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Saw mills
Sawing
Mathematical models
Algorithms
Series Number
E-1443
Location
Ottawa, Ontario
Language
French
Abstract
Sawmilling - Mathematical models
Sawing accuracy
Lumber Size Program (Computer program)
LUSI (Computer program)
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Optimisation du delignage et de l'eboutage : rapport d'etape

https://library.fpinnovations.ca/en/permalink/fpipub41588
Author
Mongeau, J.-P.
Date
June 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mongeau, J.-P.
Date
June 1993
Material Type
Research report
Physical Description
183 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Trimming
Simulation
Saw mills
Positioning
Optimization
Logs
Algorithms
Series Number
Forestry Canada No. 46
E-1478
Location
Sainte-Foy, Québec
Language
French
Abstract
Ce projet constitue le programme d'etude de maitrise d'une etudiante (Annick Tremblay) du departement d'informatique de l'Universite Laval. Les objectifs etaient de developper un algorigthme d'optimisation des operations de delignage et d'eboutage ainsi que de proposer un algorithme effectuant le positionnement optimal des pieces a debiter. L'algorithme choisi pour le delignage et l'eboutage est fonde sur une technique d'optimisation appellee programmation dynamique. Pour sa part, l'algorithme de positionnement fait appel a une technique de subdivision d'intervalles. L'algorithme de positionnement ameliore de 76% le temps de traitement par rapport a l'algorithme de recherche exhaustive (force brute) generalement utilise.
Sawmill Simulation
Edging Optimization
Trimming Optimization
Dynamic Programming Technique
Log positioning - Simulation
Algorithms
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Optimisation du delignage et de l'eboutage

https://library.fpinnovations.ca/en/permalink/fpipub41621
Author
Mongeau, J.-P.
Date
March 1992
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mongeau, J.-P.
Date
March 1992
Material Type
Research report
Physical Description
8 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Trimming
Simulation
Saw mills
Positioning
Optimization
Logs
Algorithms
Series Number
Forestry Canada No. 47
E-1909
Location
Sainte-Foy, Québec
Language
French
Abstract
Ce projet consiste a diriger en collaboration avec un professeur de l'Universite Laval une etudiante inscrite a la maitrise au departement d'informatique de la Faculte des sciences. Le sujet de la recherche concerne l'optimisation des operations de delignage et d'eboutage. Ce rapport fait etat de l'avancement des travaux.
Sawmill Simulation
Edging Optimization
Trimming Optimization
Dynamic Programming Technique
Log positioning - Simulation
Algorithms
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Applications des systemes de vision dans l'industrie du bois de sciage

https://library.fpinnovations.ca/en/permalink/fpipub1874
Author
Levesque, Y.
Date
March 1990
Edition
38396
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Levesque, Y.
Date
March 1990
Edition
38396
Material Type
Research report
Physical Description
23 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Visual efficiency
Systems
Application
Series Number
E-1194
Location
Ottawa, Ontario
Language
French
Abstract
Systems de Vision
Applications
Documents
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Benefits of adjusting planner depth of cuts

https://library.fpinnovations.ca/en/permalink/fpipub1820
Author
Reny, L.E.
Date
March 1989
Edition
38340
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Reny, L.E.
Date
March 1989
Edition
38340
Material Type
Research report
Physical Description
95 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saw mills
Planing
Mathematical models
Algorithms
Series Number
3743K205
E-1087
Location
Ottawa, Ontario
Language
English
Abstract
Sawmilling - Planing
Planing - Mathematical models
Sawmilling - Mathematical models
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Validation of mathematical model for target size of cants before resawing

https://library.fpinnovations.ca/en/permalink/fpipub38341
Author
Constantineau, Serge
Date
March 1989
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Constantineau, Serge
Date
March 1989
Material Type
Research report
Physical Description
14 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Saw mills
Sawing
Mathematical models
Algorithms
Series Number
3743K421
E-1088
Location
Ottawa, Ontario
Language
English
Abstract
Sawmilling - Mathematical models
Sawing accuracy
Lumber Size Program (Computer program)
LUSI (Computer program)
Documents
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Cross impact analysis of investments in the development of technologies in the lumber industry: preliminary "straw-man" model

https://library.fpinnovations.ca/en/permalink/fpipub5644
Author
Ziv, Y.
Vertinsky, I.
Thompson, B.
Schuler, A.T.
Date
July 1988
Edition
38327
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Ziv, Y.
Vertinsky, I.
Thompson, B.
Schuler, A.T.
Date
July 1988
Edition
38327
Material Type
Research report
Physical Description
31 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Technological innovation
Mathematical models
Algorithms
Series Number
CFS project no.43
Project no.5614A404
E-1057
Location
Ottawa, Ontario
Language
English
Abstract
Technological forecasting - Mathematical models
Forest products industry, Effect of technological innovations
Documents
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10 records – page 1 of 1.