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Caractérisation du trait de scie permettant le collage sur chant du bois franc : rapport d'étape

https://library.fpinnovations.ca/en/permalink/fpipub42292
Author
Tremblay, Carl
Date
July 2004
Material Type
Research report
Field
Sustainable Construction
Author
Tremblay, Carl
Date
July 2004
Material Type
Research report
Physical Description
8 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Kerf
Sawing
Panels
Joints
Series Number
General Revenue 4024
Location
Sainte-Foy, Québec
Language
French
Abstract
Des visites industrielles auprès des producteurs et des utilisateurs de panneaux collés sur chant ont été effectuées afin de définir ce qu’est un collage sur chant de qualité pour les produits d’apparence. Cette enquête répondait ainsi au premier objectif spécifique du projet. Lors des visites, des panneaux collés avec joints de bonne et de mauvaise qualité ont été recueillis pour examen au laboratoire de Forintek. Des mesures effectuées au microscope ont permis d’établir à 0.05 mm la valeur maximale acceptable de largeur du joint de colle d’un panneau. Les principales causes de joints problématiques propres à l’opération de délignage des bandes sont l’éclatement des fibres du bois sur l’arête, la trop grande rugosité de la surface sur chant et la mauvaise rectitude du trait de scie. La proportion de panneaux rejetés reliés à ces causes varie de 0.5 à 3 %. Les fentes en bouts et les joints ouverts aux extrémités dus à un retrait en largeur des bandes de bois suite à un séchage sont responsables d’une plus grande proportion de rejets de panneaux. La plupart des usines visitées utilisent une scie à refendre à lame unique pour le délignage de bandes de largeur variable. Les modèles de déligneuse Mattison 202 et 404 sont utilisés dans la majorité des cas. Toutefois, certaines usines utilisent des modèles à scies multiples. Suite au délignage, la qualité du trait de scie est vérifiée de façon visuelle seulement. La présence de la pointe de diamant sur chant est utilisée comme indice de qualité collage. La seconde année du projet portera sur l’identification et le développement de méthodes d’évaluation des paramètres affectant la qualité collage.
Sawing - Kerf
Panels - Joints, Glued
Documents
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Caractérisation du trait de scie permettant le collage sur chant du bois franc : rapport final

https://library.fpinnovations.ca/en/permalink/fpipub42294
Author
Tremblay, Carl
Date
March 2005
Material Type
Research report
Field
Sustainable Construction
Author
Tremblay, Carl
Date
March 2005
Material Type
Research report
Physical Description
19 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Kerf
Sawing
Panels
Joints
Series Number
General Revenue 4024
Location
Sainte-Foy, Québec
Language
French
Abstract
Des visites industrielles auprès des producteurs et des utilisateurs de panneaux collés sur chant ont été effectuées afin de définir ce qu’est un collage sur chant de qualité pour les produits d’apparence. Lors des visites, des panneaux collés avec joints de bonne et de mauvaise qualité ont été recueillis pour examen au laboratoire de Forintek. Des mesures effectuées au microscope ont permis d’établir à 0.05 mm la valeur maximale acceptable de largeur du joint de colle d’un panneau. Les principales causes de joints problématiques propres à l’opération de délignage des bandes sont l’éclatement des fibres du bois sur l’arête, la trop grande rugosité de la surface sur chant et la mauvaise rectitude du trait de scie bien que l’angle d’équerre de la scie constitue aussi un paramètre critique. La proportion de panneaux rejetés en usines reliés à ces causes varie de 0.5 à 3 %. Des mesures de rugosité sur un échantillon de bandes recueillies en usines ont permis d’établir des valeurs représentatives de rugosité sur chant de bandes utilisées à la production industrielle de panneaux. Des mesures de rugosité sur des bandes délignées en laboratoire ont démontré les effets importants du modèle de scie et de la vitesse d’alimentation, ou avance par dent, sur les valeurs de rugosité sur chant. Des mesures effectuées sur des bandes délignées à partir de scies usées ont démontré que la rugosité sur chant ne permet pas de détecter le niveau d’usure d’une scie, les valeurs moyennes de rugosité étant similaires à celles de bandes délignées à l’aide de scies bien affûtées. Suite à la fabrication de panneaux en laboratoire à partir de bandes présentant une large gamme de rugosité sur chant, des mesures ont démontré l’augmentation de la largeur des joints de colle, l’augmentation de la proportion des joints de largeur supérieure à 0.05 mm (trop apparents) et la diminution de la résistance en cisaillement des joints de colle avec l’accroissement de la rugosité sur chant des bandes. Les paramètres de collage (type de colle, pression aux serres, température ambiante, etc.) furent gardés constants pour la fabrication de l’ensemble des panneaux. Finalement, en fonction des résultats obtenus dans le cadre de cette étude, des valeurs de rugosité sur chant Ra et Rt de 9 µm et 80 µm respectivement peuvent être considérées comme des valeurs permettant la fabrication à grand volume de panneaux avec joints de colle de qualité, une augmentation de la rugosité sur chant résultant en des joints de colle plus apparents.
Sawing - Kerf
Panels - Joints, Glued
Documents
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Characterization of ripsaw kerf for edge-glueing hardwood strips : final report

https://library.fpinnovations.ca/en/permalink/fpipub42405
Author
Tremblay, Carl
Date
March 2005
Material Type
Research report
Field
Sustainable Construction
-glued panels were conducted in order to characterize the quality of edge-glued joints in appearance
Author
Tremblay, Carl
Date
March 2005
Material Type
Research report
Physical Description
18 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Kerf
Sawing
Panels
Joints
Series Number
General Revenue Project No. 4024
Location
Sainte-Foy, Québec
Language
English
Abstract
Mill visits to manufacturers and users of edge-glued panels were conducted in order to characterize the quality of edge-glued joints in appearance products. During these visits, panels with gluelines of good and poor quality were collected for further analysis in Forintek’s laboratory. Microscopic measurements served to determine that the maximum acceptable width of glue joints in edge-glued panels is 0.05 mm. The main causes of troublesome gluelines resulting from ripping operations are splintering at the juncture of the edge and flat surface, excessive edge roughness, and uneven straightness of the saw kerf, although the right angle of the saw is also a critical parameter. The percentage of mill-rejected panels as a result of these problems ranges from 0.5% to 3%. A series of edge roughness measurements taken from a sample of strips from participating mills set the stage for the development of representative roughness values for the edges of strips used in the industrial production of edge-glued panels. Edge roughness measurements taken from strips ripped in the laboratory showed the impact of various factors on edge roughness values: saw blades, feed speed and chip load. Measurements taken from edges ripped with worn saw blades indicated that edge roughness cannot be used to determine saw blade wear values because average roughness values obtained with such blades were found to be similar to those of strips ripped with well-sharpened saws. Following the laboratory assembly of panels using strips exhibiting a wide range of edge roughness, measurements revealed that edge roughness contributes to increased glueline width, a greater proportion of gluelines wider than 0.05 mm (too apparent) and a reduction in glueline shear strength. Glueing parameters (type of glue, clamp pressure, ambient temperature, etc.) were constant throughout the production of laboratory panels. Finally, the results of this study suggest that edge roughness values of 9 µm for Ra and 80 µm for Rt allow large-volume manufacturing of panels with good quality gluelines and that an increase in edge roughness will result in more apparent gluelines.
Sawing - Kerf
Panels - Joints, Glued
Documents
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Checking in CLT panels : an exploratory study

https://library.fpinnovations.ca/en/permalink/fpipub2772
Author
Casilla, Romulo C.
Lum, Conroy
Pirvu, Ciprian
Wang, Brad J.
Date
December 2011
Edition
39389
Material Type
Research report
Field
Sustainable Construction
Author
Casilla, Romulo C.
Lum, Conroy
Pirvu, Ciprian
Wang, Brad J.
Date
December 2011
Edition
39389
Material Type
Research report
Physical Description
29 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Panels tests
Panels
Laminate product
Building construction
Series Number
Transformative Technologies # TT1.07
W-2877
Location
Vancouver, British Columbia
Language
English
Abstract
A study was conducted with the primary objective of gathering information for the development of a protocol for evaluating the surface quality of cross-laminated timber (CLT) products. The secondary objectives were to examine the effect of moisture content (MC) reduction on the development of surface checks and gaps, and find ways of minimizing the checking problems in CLT panels. The wood materials used for the CLT samples were rough-sawn Select grade Hem-Fir boards 25 x 152 mm (1 x 6 inches). Polyurethane was the adhesive used. The development of checks and gaps were evaluated after drying at two temperature levels at ambient relative humidity (RH). The checks and gaps, as a result of drying to 6% to 10% MC from an initial MC of 13%, occurred randomly depending upon the characteristics of the wood and the manner in which the outer laminas were laid up in the panel. Suggestions are made for minimizing checking and gap problems in CLT panels. The checks and gaps close when the panels are exposed to higher humidity. Guidelines were proposed for the development of a protocol for classifying CLT panels into appearance grades in terms of the severity of checks and gaps. The grades can be based on the estimated dimensions of the checks and gaps, their frequency, and the number of laminas in which they appear.
Building construction - Laminated
Laminated products
Panels - Tests
Documents
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China's non-structural panel market in furniture and interior finish

https://library.fpinnovations.ca/en/permalink/fpipub1241
Author
Wahl, A.
Date
April 2004
Edition
37692
Material Type
Research report
Field
Sustainable Construction
Author
Wahl, A.
Contributor
Wood Panel Bureau and Forestry Innovation Investment
Date
April 2004
Edition
37692
Material Type
Research report
Physical Description
152 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Market Analysis
Subject
Utilization
Panels
Markets
China
Furniture
Series Number
4283
W-2048
Location
Vancouver, British Columbia
Language
English
Abstract
This project evaluates the potential for non-structural panels in the furniture (including cabinetry) and interior finish industries in China. It entailed two stages: 1. Review of existing information on non-structural panel markets and industry in China; 2. Survey of wood-based panel manufacturers and non-structural panel specifiers in China. 137 furniture and 132 interior finish manufacturers in eastern and southern China were surveyed by phone, mail/fax, and in personal interviews. Personal interviews were carried out with 11 panel mills in the eastern region. The literature review is based on the Preliminary Competitor Analysis for Wood Products in China (Wahl and Gaston, 2003) that was carried out for Forestry Innovation Investment. Information specific to furniture, other non-structural panel markets and more recent publications have been added to this literature review.
Board products - Utilization - China
Furniture - Markets - China
Markets - China
Finishes
Panels
Documents
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Creep and creep-rupture behaviour of wood-based structural panels

https://library.fpinnovations.ca/en/permalink/fpipub5502
Author
Laufenberg, T.L.
Palka, L.C.
McNatt, J.D.
Date
February 1994
Edition
37293
Material Type
Research report
Field
Sustainable Construction
Author
Laufenberg, T.L.
Palka, L.C.
McNatt, J.D.
Date
February 1994
Edition
37293
Material Type
Research report
Physical Description
45 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Mechanical properties
Panels
Series Number
W-975
Location
Vancouver, British Columbia
Language
English
Abstract
The highlights of a co-operative research program developed by the U.S. Forest Products Laboratory (FPL) and Forintek Canada Corp. to provide detailed creep-rupture and some creep information for composite panel products are summarized here. Support for this program has been provided by the American Plywood Association, The Waferboard Association (now the Structural Board Association), as well as the U.S. and Canadian Forest Services. Commercially produced plywood, oriented strandboard (OSB), and waferboard were tested to identify three mills that produced panels with high, low and median flexural creep performance. These three plywood, three OSB, and three waferboard products were then extensively tested to provide information on their duration of load and creep performance.
Creep
Panels - Strength
Documents
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Design models for CLT shearwalls and assemblies based on connection properties

https://library.fpinnovations.ca/en/permalink/fpipub6035
Author
Popovski, Marjan
Gavric, I.
Date
April 2014
Edition
43014
Material Type
Research report
Field
Sustainable Construction
Author
Popovski, Marjan
Gavric, I.
Contributor
Natural Resources Canada. Canadian Forest Service.
Date
April 2014
Edition
43014
Material Type
Research report
Physical Description
115 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Building construction
Design
Laminate product
Panels
Timber
Series Number
Transformative Technologies
W-3093
Language
English
Abstract
The work presented in this report is a continuation of the FPInnovations' research project on determining the performance of the CLT as a structural system under lateral loads. As currently there are no standardized methods for determining the resistance of CLT shearwalls under lateral loads, the design approaches are left at discretion of the designers. The most common approach that is currently used in Europe and North America assumes that the resistance of CLT walls is a simple summary of the shear resistance of all connectors at the bottom of the wall. In this report some new analytical models for predicting of the design (factored) resistance of CLT walls under lateral loads were developed based on connection properties. These new models were than evaluated for their consistency along with the models that are currently used in North America and in Europe. In total five different design models (approaches) were used in the study, the two existing models and three newly developed ones. All models were used to predict the factored lateral load resistances of various CLT wall configurations tested in 2010 at FPInnovations. The analyzed walls had different aspect ratios and segmentation, different vertical load levels, different connection layouts and different fasteners in the connections (ring nails, spiral nails and screws). The design values obtained using the various analytical models were compared with the maximum forces and yielding forces obtained from the experimental tests. Ratios between the ultimate loads obtained from experimental tests and design values obtained by the five analytical design models were used as a measure for the consistency of the models. Newly developed models that account for sliding-uplift interaction in the brackets (models D3-D5) showed higher level of consistency compared to existing ones. The analytical model D4 that accounts for sliding-uplift interaction according to a circular domain, is probably the best candidate for future development of design procedures for determining resistance of CLT walls under lateral loads. In case of coupled CLT walls, contribution of vertical load to the wall lateral resistance was found to be two times lower than in case of single wall element with the same geometry and vertical load. Special attention in the coupled walls design should be given to step joints between the adjacent wall panels. Over-design of the step joint can result in completely different wall behavior in terms of mechanical properties (strength, ductility, deformation capacity, etc.) that those predicted. It should be noted that conclusions made in this report are made based on the comparison to the tested configurations only. Additional experimental data or results from numerical parametric analyses are needed to cover additional variations in wall parameters such as wall geometry and aspect ratio, layout of connectors (hold-downs, brackets), type and number of fasteners used in the connectors, and the amount of vertical load. The findings in this report, however, give a solid base for the development of seismic design procedure for CLT structures. Such procedure should also include capacity based design principles, which take into account statistical distributions of connections resistances.
Documents
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Determination and prediction of the creep behavior and performance of light weight hollow core panel under long term static loading and high humidity conditions

https://library.fpinnovations.ca/en/permalink/fpipub5749
Author
Deng, James
Côté, Francine
Semple, Katherine
Sam-Brew, S.
Date
May 2012
Edition
39434
Material Type
Research report
Field
Sustainable Construction
of light weight hollow core sandwich panels. The experiment focused on the investigation of creep behavior
Author
Deng, James
Côté, Francine
Semple, Katherine
Sam-Brew, S.
Date
May 2012
Edition
39434
Material Type
Research report
Physical Description
31 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Panels
Humidity
Series Number
Value to Wood No. FPI-11-08
Project no.201005269
E-4786
Location
Québec, Québec
Language
English
Abstract
This report summarizes the experimental works that was carried out for a one-year research project developed as the continuation of previous research projects on the subject of light weight hollow core sandwich panels. The experiment focused on the investigation of creep behavior of light weight hollow core panel under long term static loading and high humidity conditions and its correlation with short term properties. Five types of surface panels were used, namely, 3.2 mm thick high density fibreboard with birch veneer on both sides, two thicknesses of M2 grade particleboard (6.3 mm and 9.5 mm) and two thicknesses of medium density fibreboard (6.3 mm and 9.5 mm). All panels were fabricated to the same final sandwich thickness of 45 mm using cell size of 12.7 mm Kraft paper honeycomb. The results of the experiment show that the strongest facing material used to make the sandwich panels was the 3.2 mm hardboard with wood veneer lamination on both sides running along the long axis of the panel and test specimen, followed by the 6.3 mm MDF and the 9.5 mm MDF. The experiment demonstrated that exposing the panels to high humidity could cause strength loss of up to half of the original strength. However, the result of the experiment also suggested that it would be difficult to accurately predict the long term creep behavior of the sandwich panels using their corresponding short term flexural properties as the correlation between creep deformation and flexural properties was rather weak under the testing procedure and condition used.
CREEP
PANEL BOARDS
CORE
LOADING
HUMIDITY
Abstract
Not available
Documents
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Détermination des paramètres optimaux de transformation pour le renforcement des joints de colle dans les feuillus

https://library.fpinnovations.ca/en/permalink/fpipub39191
Author
Tremblay, Carl
Date
March 2009
Material Type
Research report
Field
Sustainable Construction
Author
Tremblay, Carl
Contributor
Natural Resources Canada. Canadian Forest Service
Date
March 2009
Material Type
Research report
Physical Description
28 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Panels
Joints
Series Number
Valeur au bois
6298
Location
Québec, Québec
Language
French
Abstract
La production de meubles, d’armoires de cuisine et autres produits d’apparence en bois massif nécessite la fabrication de panneaux de type lamellé-collé où des bandes de bois de largeur variable sont collées sur chant. De nombreux manufacturiers de produits d’apparence utilisent une déligneuse pour la préparation des bandes à coller sur chant. Toutefois, certaines usines procèdent à cette opération à l’aide d’une moulurière. Un porte-outils rotatif muni de couteaux est alors utilisé pour le rabotage de la surface sur chant des pièces de bois lors de leur passage à la moulurière. Peu d’informations sont disponibles actuellement au sujet de l’ajustement des paramètres de moulurage permettant l’obtention d’une surface sur chant de qualité collage. L’objectif principal du projet est de déterminer les paramètres optimaux de rabotage à la moulurière permettant l’obtention de joints de colle de qualité chez des panneaux de type lamellé-collé en bois feuillus. Les objectifs spécifiques sont 1) d’étudier l’impact de la variation des paramètres de moulurage sur la qualité des joints de colle (largeur et résistance) et 2) de découvrir un indicateur d’usinage mesurable relié à la dégradation de la qualité des joints de colle. Le matériel utilisé à l’étude de l’impact de la variation des paramètres de moulurage sur la qualité des joints de colle de panneaux a consisté en des sciages d’épaisseur 4/4 po. (2,5 cm) de bois d’érable à sucre, de chêne rouge, de pin blanc et de cerisier. Cinq vitesses d’alimentation et deux angles des couteaux ont été considérés dans l’étude. Pour chaque essence, les pas d’usinage et angles de couteaux permettant l’obtention de joints de colle de faible apparence ont été établis : angle des couteaux de 12o pour l’érable à sucre, le chêne rouge et le cerisier, angle de 20o pour le pin blanc, pas d’usinage inférieur à 2,3 mm pour le cerisier, inférieur à 3,6 mm pour l’érable à sucre et le pin blanc, inférieur à 5,7 mm pour le chêne rouge. Le bois d’érable à sucre d’épaisseur 4/4 po. a été utilisé pour la recherche d’un indicateur permettant à l’opérateur de détecter une perte de qualité au rabotage sur chant se traduisant par des joints de colle de moindre qualité des panneaux à produire. Des indicateurs potentiels tels que le type de copeaux, les émissions sonores et la consommation électrique du porte-outils rotatif de la moulurière ont été considérés. Le projet n’a pas permis d’identifier clairement un indicateur mesurable relié à la dégradation du rabotage sur chant. Toutefois, des études additionnelles devraient porter sur les émissions sonores. Finalement, les résultats du test laissent entrevoir une durée de vie relativement longue des couteaux utilisés au simple rabotage sur chant de pièces d’épaisseur commune (4/4 po.) pour la fabrication de panneaux de type lamellé-collé.
Appearance products
Panels - Joints, Glued
Documents
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Dual purpose fire retardant adhesive with improved temperature stable bonds

https://library.fpinnovations.ca/en/permalink/fpipub38747
Contributor
Department of Supply and Services
Forintek Canada Corp.
Date
1979
Material Type
Research report
Field
Sustainable Construction
to manufacture plywood panels for use m interior applications. In this application, the adhesive, besides
Contributor
Department of Supply and Services
Forintek Canada Corp.
Date
1979
Material Type
Research report
Physical Description
14 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Panels
Adhesives
Location
Ottawa, Ontario
Language
English
Abstract
Panel Products
Adhesive
Fire Retardant - Adhesive
Documents
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35 records – page 1 of 4.