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74 records – page 1 of 8.

Assessment of new glue application technology for OSB

https://library.fpinnovations.ca/en/permalink/fpipub1051
Author
Groves, C. Kevin
Troughton, G.E.
Date
June 1997
Edition
37444
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Groves, C. Kevin
Troughton, G.E.
Date
June 1997
Edition
37444
Material Type
Research report
Physical Description
16 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strandboards
Spraying
Penetration
Oriented strandboard
Orientation
Gluing
Glue
Series Number
Project No. 1074
W-1401
Location
Vancouver, British Columbia
Language
English
Abstract
A pilot plant apparatus was built to electrostatically spray phenolic resin on strands. To evaluate the resin distribution on these strands, an image analysis method was developed. The experimental conditions in this study made it difficult to compare electrostatic treatments to control (non- electrostatic) treatments. Although not statistically significant, there were notable differences between these treatments which indicate that electrostatic resin application may improve panel properties and is therefore worth further investigation. First of all, the electrostatic treatment produced panels with a 10% higher internal bond than the control. Secondly, the resin distribution results show that the electrostatic spray, on average, covered a 30% greater area of the strands than the control even though both treatments applied resin at the 2% resin solids level. Further experiments using alternative test procedures are planned to compare electrostatic treatments to control treatments that simulate industrial conditions.
Glue - Penetration
Oriented strandboard - Gluing - Tests
Gluing - Processes
Spraying
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Automated log pocket monitoring system for OSB mills

https://library.fpinnovations.ca/en/permalink/fpipub3063
Author
Groves, C. Kevin
Date
April 2013
Edition
39712
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Groves, C. Kevin
Contributor
Natural Resources Canada. Canadian Forest Service.
Date
April 2013
Edition
39712
Material Type
Research report
Physical Description
14 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Test methods
Strandboards
Oriented strandboard
Orientation
Series Number
W-3008
Location
Vancouver, British Columbia
Language
English
Abstract
A prototype scanning system successfully demonstrated the capability of real-time, log pocket monitoring that can be used to alert operators of improper pocket filling practice. Several previous FPInnovations studies have shown that the log pocket filling is often poorly controlled resulting in poor log alignment and/or incomplete filling that adversely affects both flake quality and strander productivity. Until now there have been no systems available to automatically measure the alignment of logs being fed into the strander or measurement of the actual filling of the strander pockets. An automated monitoring system is needed to signal operators when the log pocket is improperly loaded. This feedback can allow operators to maintain proper log filling procedure to maximize flaking quality. In March 2013 a machine vision scanning system comprised of a camera, 2 line lasers and computer with image analysis software, was tested for two days at the Peace Valley OSB mill (PVOSB) in Fort Saint John, BC. The scanner’s camera and lasers were mounted 13 feet above the center of the log pocket base. Images of pocket filling were acquired and analyzed for pass/fail conditions. Two image groups were selected for analysis, one of full pocket, aligned logs (pass) and the other containing misaligned logs and/or insufficient pocket fill (fail). For all pocket scans, scanner measurements were compared to manual visual classification. Approximately 50 different pockets were scanned with results and images saved for analysis. For fill height and vertical log alignment measurement, the scanner correctly identified >95% of all the pockets examined. However, log alignment measurement in the horizontal x-y plane did not function as intended due to poor image contrast that could not be resolved during the mill trial. This technique has been shown to work well in previous pilot plant tests (Groves, 2012) which confirms that the underlying measurement fundamentals are sound. It is recommended that only minor lighting adjustments are required for the scanning system to work well in a mill setting. Implementing this technology in OSB mills should help to reduce the occurrence of poor pocket filling that can adversely affect strand quality. It should be noted that even small improvements to strand quality and productivity can yield significant cost benefits. It is estimated that reducing fines by a modest 1% and improving productivity by 1% can return in excess of $1 million/year based on an average size Canadian OSB mill.
Oriented strandboard - Manufacture
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Balsam poplar as a furnish material for the manufacture of oriented strandboard

https://library.fpinnovations.ca/en/permalink/fpipub2187
Contributor
British Columbia Ministry of Forests
Forintek Canada Corp.
Date
July 1993
Edition
38731
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Contributor
British Columbia Ministry of Forests
Forintek Canada Corp.
Date
July 1993
Edition
38731
Material Type
Research report
Physical Description
82 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strandboards
Populus
Oriented strandboard
Orientation
Balsam
Series Number
3843M417
E-2300
Location
Ottawa, Ontario
Language
English
Abstract
Oriented strandboard
Balsam Poplar
Furnish Material
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Balsam poplar/cottonwood as a furnish material for the manufacture of oriented strandboard

https://library.fpinnovations.ca/en/permalink/fpipub2138
Author
Aston, R.
Date
July 1993
Edition
38676
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Aston, R.
Date
July 1993
Edition
38676
Material Type
Research report
Physical Description
82 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Waferboards
Strandboards
Research
Populus
OSB
Oriented strandboard
Orientation
Bibliographies
Balsam
Series Number
3843M417
E-1923
Location
Ottawa, Ontario
Language
English
Abstract
There are six species of poplar native to Canada's forests. One of the most abundant and widely used of the species is the aspen poplar (populus Tremuloides). Aspen has become the most desirable species for the production of oriented strandboard (OSB). Certain sections of Alberta and British Columbia have considerable stands of aspen. The aspen stands also contain varying amounts of balsam poplar (populus balsamifera) and black cottonwood (populus trichocarpa) and various hybrids of the three species. Forintek Canada Corp's Technical Advisory Committee (TAC) was asked by the B.C.Ministry of Forests to establish whether cottonwood could be a suitable furnish for the production of OSB, since it represented a sizeable potential resource in British Columbia. The poplar species are loosely identified by several names and to confirm the actual species we were referred to Mr.Bob Brash, District Manager, Dawson Creek Forest District. Mr.Brash confirmed that the species in question was in fact balsam poplar (populus balsamifera). Balsam poplar is also known as black poplar and balm poplar. An extensive literature search was conducted on the use of balsam poplar/cottonwood in the production of OSB. The literature review and a summary are reported here.
Balsam Poplar - Research - Bibliography
Cottonwood
Oriented strandboard - Manufacturing
OSB - Research
Waferboard
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Conversion of short-term to long-term responses of OSB by the Palka Model

https://library.fpinnovations.ca/en/permalink/fpipub37450
Author
Bach, L.
Karacabeyli, Erol
Date
May 1997
Material Type
Research report
Field
Sustainable Construction
Author
Bach, L.
Karacabeyli, Erol
Contributor
Canada. Canadian Forest Service.
Date
May 1997
Material Type
Research report
Physical Description
47 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Testing
Mechanical properties
Strandboards
Oriented strandboard
Orientation
Series Number
Canadian Forest Service No. 22A
Project No. 1156
W-1410
Location
Vancouver, British Columbia
Language
English
Abstract
A prediction model for long term creep and creep-rupture behavior of OSB was developed by the late Senior Research Scientist, Dr. L. Palka at Forintek Canada Corporation, Vancouver, BC, Canada. By using one minute destructive ramp load test results, the "Palka Model" allows the prediction of time-to-failure and time-dependent creep deformations under given sustained loads. Verification testing of the model was performed on time-to-failure at the 75% sustained load level and on creep deformation behavior at the 25% and 50% levels. The verification tests gave encouraging results which showed a reasonable agreement between the test results and the Palka Model predictions. The Palka Model is recommended for use as a first approximation prediction tool for long term creep behavior of OSB. The model prediction technique appears ideal to assist in product development decisions and also in evaluation of load duration and creep factors in timber design codes.
Oriented strandboard
Oriented strandboard - Strength - Tests
Creep
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Critical times, moisture contents and temperatures for detectable strength loss in plywood and oriented strand board : pilot study|IN: Limiting conditions for decay : compilation of reports.

https://library.fpinnovations.ca/en/permalink/fpipub41215
Author
Clark, Jean E.
Morris, Paul I.
Lum, Conroy
Date
April 2000
Material Type
Research report
Field
Sustainable Construction
Author
Clark, Jean E.
Morris, Paul I.
Lum, Conroy
Contributor
Canada. Canadian Forest Service.
Date
April 2000
Material Type
Research report
Physical Description
11 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Mechanical properties
Strandboards
Physical properties
Plywood
Oriented strandboard
Orientation
Series Number
IN Canadian Forest Service No. 16;1963
W-1674
Location
Vancouver, British Columbia
Language
English
Abstract
The project objective is to identify the wood-rotting fungi causing decay in Canadian buildings, and to provide data for a numerical model which will provide an indication of the time required for initiation of strength loss in wood-based panels when exposed to a range of moisture contents and temperatures. The MEWS consortium led by the National Research Council's Institute for Research in Construction is developing a computer model to predict the moisture and temperature conditions within a construction assembly in service. By including a damage function calculation for the various building components, the model can predict the consequences of these conditions in terms of strength loss. Forintek's role is to develop an experimental protocol that will be universally acceptable in the field of wood science, and generate a data set from which one could derive a damage equation for wood decay as a function of time, temperature and moisture conditions. Discussions have established that strength loss in sheathing is the first priority. A series of proposed test methods were examined. In consultation with members of the consortium task force, a method was selected which was felt would provide suitable strength loss data within the constraints of the funding available. Sheathing samples will be subjected to various combinations of temperature and humidity and repeatedly inoculating with a wood-rotting fungus to represent natural infection. The samples will be monitored using non-destructive testing and then destructively tested when the first test suggests a strength change. The result is a two-stage test at a range of temperatures and humidity levels, giving a measurement of time to strength loss. An initial pilot study is concerned with development, refining and verification of the method. "Method B" of ASTM 3043 is being evaluated to determine if it will be appropriate. The test is monitoring the bending stiffness and strength of oriented strand board samples, using a 2-point flexure test. The pilot study is underway, with samples exposed to 20°C and a relative humidity of approximately 96%. Problems involving moisture control in the environmental chambers have been resolved, as have questions around the sample size, the number of test specimens required in the pilot study, the time required for conditioning prior to inoculation and the actual bending and strength test procedures. The inoculation protocol is being evaluated. At this time none of the test pieces have shown significant losses in bending stiffness. A number of test conditions remain to be defined, however, and these will be established at the conclusion of the pilot study.
Plywood - Strength
Oriented strandboard - Strength
Strength - Influence of moisture content
Strength - Influence of temperature
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Critical times, moisture contents and temperatures for detectable strength loss in plywood and oriented strand board : planning and proposed work|IN: Limiting conditions for decay : compilation of reports.

https://library.fpinnovations.ca/en/permalink/fpipub41214
Author
Clark, Jean E.
Morris, Paul I.
O'Connor, J.
Lum, Conroy
Date
April 2000
Material Type
Research report
Field
Sustainable Construction
Author
Clark, Jean E.
Morris, Paul I.
O'Connor, J.
Lum, Conroy
Contributor
Canada. Canadian Forest Service.
Date
April 2000
Material Type
Research report
Physical Description
10 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Mechanical properties
Strandboards
Physical properties
Plywood
Oriented strandboard
Orientation
Series Number
IN Canadian Forest Service No. 16;1963
W-1673
Location
Vancouver, British Columbia
Language
English
Abstract
The project objective is to identify the wood-rotting fungi causing decay in Canadian buildings, and to provide data for a numerical model which will provide an indication of the time required for initiation of strength loss in wood-based panels when exposed to a range of moisture contents and temperatures. The MEWS consortium led by the National Research Council's Institute for Research in Construction is developing a computer model to predict the moisture and temperature conditions within a construction assembly in service. By including a damage function calculation for the various building components, the model can predict the consequences of these conditions in terms of strength loss. We do not have strength data on North American wood species exposed to decay fungi under limiting conditions (20-30%). There is also no standard protocol for assessing strength loss due to decay in non-ideal conditions. Forintek's role is to develop an experimental protocol that will be universally acceptable in the field of wood science, and generate a data set from which one could derive a damage equation for wood decay as a function of time, temperature and moisture conditions. Discussions have established that strength loss in sheathing is the first priority. A series of proposed test methods were examined. In consultation with members of the consortium task force, a method was selected which was felt would provide suitable strength loss data within the constraints of the funding available.
Plywood - Strength
Oriented strandboard - Strength
Strength - Influence of moisture content
Strength - Influence of temperature
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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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Development of a high performance OSB panel : progress report

https://library.fpinnovations.ca/en/permalink/fpipub5672
Author
Alexopoulos, J.
Kirincic, S.
Date
March 1993
Edition
38800
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Alexopoulos, J.
Kirincic, S.
Contributor
Alberta Research Council
Date
March 1993
Edition
38800
Material Type
Research report
Physical Description
22 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Testing
Strandboards
Performance
Oriented strandboard
Orientation
Series Number
3843M410
E-2675
Location
Ottawa, Ontario
Language
English
Abstract
Previous research at Forintek Canada Corp. showed that by optimizing aspen strand alignment, strand length, strand thickness, and face-to-core (f/c) layer composition, three layer oriented strandboard (OSB) panels can be produced with bending properties significantly exceeding those of CSP commercial plywood. Also, the creep behaviour under room conditions was comparable for the two panel types. The specific objective for this year's work was to extablish the improved performance using panels produced in structural sizes and under conditions that parallel those of the industry more closely.
Oriented strandboard - Performance testing
Development
High Performance
Documents
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Development of a high performance OSB panel : progress report

https://library.fpinnovations.ca/en/permalink/fpipub38415
Author
Alexopoulos, J.
Date
March 1991
Material Type
Research report
Field
Wood Manufacturing & Digitalization
waferboards and 4 oriented strandboards for each combination of strand length(3) and face-to-core layer
Author
Alexopoulos, J.
Date
March 1991
Material Type
Research report
Physical Description
41 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strandboards
OSB
Oriented strandboard
Orientation
Series Number
3843M410
E-1236
Location
Ottawa, Ontario
Language
English
Abstract
Oriented strandboard
OSB - Production
Documents
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74 records – page 1 of 8.