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Advancement in osb manufacturing technology

https://library.fpinnovations.ca/en/permalink/fpipub5677
Author
Hsu, W.H.E.
Kirincic, S.
Date
January 1996
Edition
38830
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hsu, W.H.E.
Kirincic, S.
Date
January 1996
Edition
38830
Material Type
Research report
Physical Description
8 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Thickness
Strands
Resin
Oriented strandboard
Location
Ottawa, Ontario
Language
English
Abstract
Oriented strandboard (OSB) manufacturing technology has been advancing steadily during the past few years. Today, the industry can produce higher quality OSB at lower costs than ever before in the product's history. Research results have shown that drying costs can be reduced and strand quality can be improved through proper wood yard management, and that the production efficiency can be improved through various ways of optimizing the pressing and processing operations. OSB quality has been improved and board density has been reduced by using long and thin strands in panel face layers and relatively short and thick strands in the panel core. The press times have been reduced by using higher press temperatures and higher mat face-layer moisture contents. The degree of strand alignment has been improved by controlling the falling distance from the alignment heads to the top of mat being formed. Strands alignment has been further enhanced by arranging the alignment disc gaps in such a way so that narrower strands can be aligned through narrower gaps and directed towards core while wider strands can be aligned through wider gaps and directed towards the panel surfaces. Based on these technical advancements, OSB can be produced faster and at a lower density without sacrificing quality. Consequently, the OSB industry is in the position to improve panel quality without resorting to costly options such as increasing resin content and press time.
OSB
Advancement
Strand Thickness
Strand Width
Strand Length
Resin Content
Press Temperature
Moisture
Documents
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Alternatives to slack wax

https://library.fpinnovations.ca/en/permalink/fpipub2802
Author
Wan, Hui
Date
March 2012
Edition
39428
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wan, Hui
Date
March 2012
Edition
39428
Material Type
Research report
Physical Description
27 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Waxes
Strands
OSB
Oriented strandboard
Orientation
Series Number
General Revenue Report Project No. 201004857
E-4780
Location
Québec, Québec
Language
English
Abstract
In this project, a comprehensive experiment studied the impact of wax type, wax content, wax heating temperature and wax molecular weight on OSB panel performance. It shows that to allow tall oil, hydrogenated soybean wax, linseed oil, and low density polyethylene (LDPE) to be used for OSB, further work is needed. We need to add wax in the OSB process; otherwise panel dimensional stability will be ruined. There is an optimal wax content of around 1% in OSB production. The wax content in OSB panel did not need to be higher than 1%. With the waxes tested, wax heating temperature should be higher than 90°C. At a fixed wax heating temperature, optimal wax molecular weight is 520 Daltons for OSB application. Applying high molecular weight wax (600 Daltons) on panel surface may help to improve panel bending strength. The experiment shows that partial substitution of slack wax with LDPE at the OSB panel surface layer may be feasible. Experimental results also show that using contact angle and surface tension tests may help us to screen waxes for OSB panel application. Based on the experimental data, one should handle different waxes in different ways. By engineering wax application parameters one can develop a cost effective way to produce composite panels to meet dimensional stability requirement. Further testing on the feasibility of using contact angle and surface tension to differentiate wax should be conducted. Emulsifying low density polyethylene should be further investigated. Further research is also needed to verify how wax operational parameters affect panel strength.
WAX
Oriented Strand Board (OSB)
Documents
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Analysis of forming equipment used in the production of oriented strand board

https://library.fpinnovations.ca/en/permalink/fpipub4836
Author
Grant, D.R.
Date
March 1995
Edition
41651
Material Type
Research report
Field
Wood Manufacturing & Digitalization
feature. OSB is manufactured by forming a mass of strands into a mat and then pressing it into a panel
Author
Grant, D.R.
Date
March 1995
Edition
41651
Material Type
Research report
Physical Description
28 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strands
Oriented strandboard
Orientation
Analysis
Series Number
Canadian Forest Service No. 12
E-2172
Location
Sainte-Foy, Québec
Language
English
Abstract
Oriented strand board
Forming Equipment
Analysis
Documents
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Comparative swelling tests on waferboard and oriented strandboard

https://library.fpinnovations.ca/en/permalink/fpipub38214
Author
Alexopoulos, J.
Pfaff, Frank
Date
March 1988
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Alexopoulos, J.
Pfaff, Frank
Date
March 1988
Material Type
Research report
Physical Description
78 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Waferboards
Swelling
Strands
Shrinkage
Panels
Oriented strandboard
Orientation
Series Number
CFS project no.3
E-744
Location
Ottawa, Ontario
Language
English
Abstract
Waferboard - Swelling
Oriented Strand Board - Swelling
Wood Based Panels - Swelling
Swelling and shrinkage
Documents
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Controlling moisture permeability of OSB

https://library.fpinnovations.ca/en/permalink/fpipub39383
Author
Ganev, S.
Date
January 2006
Material Type
Research report
Field
Wood Manufacturing & Digitalization
. The wood strands are a potential food source for a variety of fungi, which have the ability to break down
Author
Ganev, S.
Date
January 2006
Material Type
Research report
Physical Description
42 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strands
Permeability
OSB
Oriented strandboard
Orientation
Series Number
3644
E-4727
Location
Québec, Québec
Language
English
Abstract
The objectives of this study were to characterize OSB panel permeability in comparison with plywood and low density fiberboard; to determine the effect of panel characteristics on the speed of moisture movement through the thickness of the OSB panels; to create a finite element model of the permeability of OSB; to suggest improvements of the OSB panel structure in function of permeability. The introduction of current report presents extracts of the theory of moisture transfer in wood materials and introduces the concept of water potential and the instantaneous profile method as adapted to OSB to be used for the determination of the diffusion coefficient (D). The experimental part is divided into three stages. In the first stage the permeance of the OSB panels, plywood and low density fiberboard is compared according to the dry cup method. The experiments showed that the low-density fiberboard panels’ permeance is more than twice as high as compared with the permeance of the OSB panel; the Western Red Cedar has an approximately equal permeance with the OSB panel, which is in turn higher as compared with the permeance of the Aspen plywood. The Aspen plywood produced with parallel plies shows approximately 30 % higher permeance as compared to the regular plywood. In the second stage, the effects of density, strand geometry and orientation level, panel density and moisture content on the permeance and on the diffusion coefficient are determined. The experiment is organized based on an experimental design. For the permeability (permeance and diffusion coefficient), the lower the strand thickness, the lower the permeability; the lower the level of strand orientation, the higher the permeability; the larger the strand width and length (surface area), the lower the permeability, the higher the permeability. During the third stage, the dynamics of moisture movement in the panel is modeled with a finite element model based on an unsteady-state moisture transfer equation and the results from simulations are compared to experimental results in order to validate the model. Ten cases of adsorption and two cases of desorption are considered. Seven of the cases are duplicated with experimental results to serve for validation of the model. The closeness of the experimental and simulation results allow concluding the validity of the finite element model, which can be used to optimize the OSB panel structure by selecting practical layer characteristics leading to desired moisture permeability.
Moisture
Permeability
Oriented Strand Board (OSB)
Documents
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The design and evaluation of an apparatus for assessing the compression properties of large single-ply panel specimens

https://library.fpinnovations.ca/en/permalink/fpipub38670
Author
Lucuik, M.
Onysko, D.M.
Tardif, Y.G.
Date
March 1993
Material Type
Research report
Field
Sustainable Construction
Author
Lucuik, M.
Onysko, D.M.
Tardif, Y.G.
Date
March 1993
Material Type
Research report
Physical Description
64 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Wood
Waferboards
Testing
Strands
Reliability
Plywood
OSB
Oriented strandboard
Orientation
Design
Series Number
Forestry Canada No. 10
3110K044
E-1913
Location
Ottawa, Ontario
Language
English
Abstract
Under current ASTM D-3501 procedures, the only practical method of obtaining compressive properties of wood based panels is to glue two or more plies of the specimen together to provide a compact column cpapble of resisting buckling. It is thought, however, that this method may not provide representative compression strength and stiffness data due to load sharing.
Waferboard
Oriented Strand Board (OSB)
Plywood
Compression Properties - Testing
Engineered Wood Products - Design
Testing Apparatus - Reliability - Testing
Documents
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Determination of whole-log moisture content for OSB production

https://library.fpinnovations.ca/en/permalink/fpipub40502
Author
Ewart, Jim
Date
Februray 2001
Material Type
Research report
Field
Fibre Supply
Author
Ewart, Jim
Date
Februray 2001
Material Type
Research report
Physical Description
8 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Wave lengths
Time
Strands
OSB
Oriented strandboard
Orientation
Advantage
Series Number
Advantage ; Vol. 2, No. 2
Language
English
Abstract
The optimum moisture content of the raw logs used in the manufacturing of oriented strand board (OSB) may be defined by a minimum requirement for fibre conversion and a maximum that will limit the cost of drying the flakes. This criterion could become the mainstay of an effective raw-log purchasing and inventory management program. However, OSB manufacturers have lacked the technology for monitoring whole-log moisture content. FERIC tested several technologies and identified time domain reflectometry (TDR) as an effective means of sampling the moisture content in a large number of logs.
Time domain reflectometry (TDR)
Moisture content
Oriented strand board (OSB)
Moisture balance
Wave attenuation
Documents
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Development of a high performance OSB panel

https://library.fpinnovations.ca/en/permalink/fpipub5662
Author
Alexopoulos, J.
Kirincic, S.
Date
May 1994
Edition
38675
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Alexopoulos, J.
Kirincic, S.
Contributor
Alberta Research Council
Date
May 1994
Edition
38675
Material Type
Research report
Physical Description
25 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Thickness
Testing
Strandboards
Strands
Performance
Panels
OSB
Oriented strandboard
Orientation
Series Number
3843M410
E-1922
Location
Ottawa, Ontario
Language
English
Abstract
The bending properties of aspen waferboard can be improved by increasing the resin content and/or board density. These options, however have limited effect and are very costly. On the other hand, panels produced with longer, oriented stands have demonstrated significant improvements in bending strength and stiffness. The panel industry has recently used wafers or strands up to approximately 102mm (4in), however, the utilization of much longer material is practical. In addition to more efficient use of the wood resource, structural panels with improved properties can penetrate more demanding applications, particularly as future engineering materials, and overcome some problems experienced with traditional wood composites such as creep. The overall objective of the study was to demonstrate that by using long strands, coupled with appropriate strand alignment, strand thickness, and face-to-core layer ratio, a structural panel can be produced with superior strength and stiffness in the aligned direction while maintaining adequate properties in the cross direction. The specific objective for this year's work was to establish the improved performance using panels produced in structural sizes and under conditions that parallel those of the industry more closely. Manufacturers of oriented strandboard and waferboard can use the information to produce high performance OSB panel products with minimal effects on production parameters and costs.
Oriented strandboard - Performance testing
OSB Panels
Strand Alignment
Strand Thickness
Documents
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Effect of moisture on OSB properties : progress report

https://library.fpinnovations.ca/en/permalink/fpipub38444
Author
Tardif, Y.G.
Onysko, D.M.
Date
March 1992
Material Type
Research report
Field
Sustainable Construction
Author
Tardif, Y.G.
Onysko, D.M.
Date
March 1992
Material Type
Research report
Physical Description
24 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Strands
Physical properties
OSB
Oriented strandboard
Orientation
Mechanical properties
Series Number
Forestry Canada No.7
3110M020
E-1286
Location
Ottawa, Ontario
Language
English
Abstract
Oriented Strand Board (OSB)
Moisture content
Physical properties
Mechanical properties
Documents
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Measurement of strand alignment in oriented strand board

https://library.fpinnovations.ca/en/permalink/fpipub41656
Author
Grant, D.R.
Date
March 1995
Material Type
Research report
Field
Wood Manufacturing & Digitalization
....................................................................... 9 Particleboard of aligned wood strands
Author
Grant, D.R.
Date
March 1995
Material Type
Research report
Physical Description
200 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strands
Oriented strandboard
Orientation
Measurement
Series Number
Forestry Canada no. 12
E-2180
Location
Sainte-Foy, Québec
Language
English
Abstract
Oriented strand board
Strand Alignment
Measurement
Documents
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16 records – page 1 of 2.