topic_free:"Gluing" found 64 records | Research Library

Abstract: This study relates to technology for tailor-making PF resin with molecular weight and size distributions beyond those now available for commercial processing. Consequently, adhesive mobility and cure speed can be adjusted through use of a two-component resin system comprised of continuous and dispersed phases. Current studies specifically concern two-component alkaline plywood formulations suitable for bonding veneer at 12 plus or minus 2% m.c.; Glue, Phenolic; Gluing - Influence of moisture content

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Aqueous phenolic dispersions for bonding veneer composites. First of two reports

https://library.fpinnovations.ca/en/permalink/fpipub1038

Author: Steiner, P.R.; Clarke, Michael Raymond; Andersen, Axel W.

Date: March 1987

Edition: 37425

Material Type: Research report

Field: Wood Manufacturing & Digitalization

Author: Steiner, P.R.; Clarke, Michael Raymond; Andersen, Axel W.

Contributor: Canada. Canadian Forest Service.

Date: March 1987

Edition: 37425

Material Type: Research report

Physical Description: 23 p.

Sector: Wood Products

Field: Wood Manufacturing & Digitalization

Research Area: Advanced Wood Manufacturing

Subject: Phenols; Gluing; Glue

Series Number: CFS No. 27; Contract no. 021812001; W-1357

Location: Vancouver, British Columbia

Language: English

Abstract: The objectives of this study were to produce and modify phenolic dispersion based adhesives using technology recently developed at Forintek and to further characterize the physical properties and bonding properties of these systems for veneer and composite board applications with emphasis on faster cure speed potential. Data developed in this study indicate opportunities to improve waferboard and plywood PF adhesives in terms of color, cure rate and application properties. Further research work is recommended to improve techniques for producing and characterizing appropriate powder disperson-like formulations for wood bonding.; Glue, Phenolic; Gluing - Influence of moisture content

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1357.pdf

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Aqueous phenolic dispersions for bonding veneer composites. Supplemental report

https://library.fpinnovations.ca/en/permalink/fpipub1039

Author: Steiner, P.R.; Clarke, Michael Raymond; Andersen, Axel W.

Date: April 1987

Edition: 37426

Material Type: Research report

Field: Wood Manufacturing & Digitalization

Author: Steiner, P.R.; Clarke, Michael Raymond; Andersen, Axel W.

Contributor: Canada. Canadian Forest Service.

Date: April 1987

Edition: 37426

Material Type: Research report

Physical Description: 11 p.

Sector: Wood Products

Field: Wood Manufacturing & Digitalization

Research Area: Advanced Wood Manufacturing

Subject: Phenols; Gluing; Glue

Series Number: CFS No. 27a; Contract no. 021812001; W-1358

Location: Vancouver, British Columbia

Language: English

Abstract: Further data on flow, viscosity-solids and veneer bonding at dry and 11 plus or minus 2% wood m.c. conditions are provided for heated PF powder systems. This information is intended to supplement the main report issued in March 1987.; Glue, Phenolic; Gluing - Influence of moisture content

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1358.pdf

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Aqueous phenolic dispersions for bonding wood composites

https://library.fpinnovations.ca/en/permalink/fpipub889

Author: Troughton, G.E.; Andersen, Axel W.; Walser, D.C.

Date: March 1991

Edition: 37236

Material Type: Research report

Field: Wood Manufacturing & Digitalization

Scientist Department K. Chan Composites Composites Gluing Technologist Department P. Tarasoff

Author: Troughton, G.E.; Andersen, Axel W.; Walser, D.C.

Date: March 1991

Edition: 37236

Material Type: Research report

Physical Description: 49 p.

Sector: Wood Products

Field: Wood Manufacturing & Digitalization

Research Area: Advanced Wood Manufacturing

Subject: Phenols; Gluing; Glue

Series Number: Forestry Canada No. 36;1812L006; W-842

Location: Vancouver, British Columbia

Language: English

Abstract: A series of dispersion-resin plywood formulations were prepared in the laboratory and their bond performance assessed on incised spruce veneer at 10% m.c. Excellent bond quality results were achieved in these laboratory experiments as indicated by high average % wood failure values of over 90%. To further develop the plywood dispersion resin, a pilot plant trial at a gluing company was conducted and again excellent bond quality results were achieved. A large quantity of the plywood dispersion resin was prepared and a successful mill trial at Cantree Plywood was carried out. This trial demonstrated that more dimensionally stable panels can be prepared from high m.c. veneer. The waferboard dispersion technology developed in this study helped facilitate a mill trial using high moisture content face wafers.; Glue, Phenolic; Gluing - Influence of moisture content

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Aqueous phenolic dispersions for bonding wood composites - progress report

https://library.fpinnovations.ca/en/permalink/fpipub628

Author: Troughton, G.E.; Walser, D.C.; Andersen, Axel W.; Clarke, Michael Raymond

Date: March 1990

Edition: 36887

Material Type: Research report

Field: Wood Manufacturing & Digitalization

Author: Troughton, G.E.; Walser, D.C.; Andersen, Axel W.; Clarke, Michael Raymond

Date: March 1990

Edition: 36887

Material Type: Research report

Physical Description: 6 p.

Sector: Wood Products

Field: Wood Manufacturing & Digitalization

Research Area: Advanced Wood Manufacturing

Subject: Phenols; Materials; Gluing; Glue

Series Number: Forestry Canada No. 34; contract no.1812L005; W-782

Location: Vancouver, British Columbia

Language: English

Abstract: Glue, Phenolic; Gluing; Composite materials

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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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Assessment of two green gluing processes for finger jointing

https://library.fpinnovations.ca/en/permalink/fpipub5074

Author: Verreault, C.

Date: April 2000

Edition: 41921

Material Type: Research report

Field: Sustainable Construction

Forintek Canada Corp. Canadian Forest Service No. 2407 ASSESSMENT OF TWO GREEN GLUING

Author: Verreault, C.

Date: April 2000

Edition: 41921

Material Type: Research report

Physical Description: 1 v.

Sector: Wood Products

Field: Sustainable Construction

Research Area: Advanced Wood Materials

Subject: Transfer; Pinus; Spruce; Joints; Gluing; Canada; Black spruce; Balsam

Series Number: Canadian Forest Service No. 2407; E-3386

Location: Sainte-Foy, Québec

Language: English

Abstract: Green finger jointing is increasingly becoming a proven possibity with three main technological processes, the New Zealand Greenweld process, the US soybean-based adhesive process and the US soybean-based adhesive process by assessing drying degrade and mechanical performance of green-glued finger-jointed material after drying. The urethane-based adhesive process was studied in a previous project. Overall, we did not observe performance differences between the Greenweld and the soybean-based adhesive processes. This was to be expected since they are both phenol resorcinol formaldehyde types of adhesives. Thus, the process choice should be made based on other considerations than mechanical performance, such as economical or procedure preferences. In comparison with the polyurethane adhesive studied before, it appears obvious that more stress concentration is present at the joint after drying because of the failure modes observed. However, with long term use, this product (the urethane-based adhesive) still needs to be studied because it is less known than the two other phenol-resorcinol-formaldehyde based processes. The results also demonstrate that green finger-jointing material, such as black spruce and balsam fir, could at least be used to produce stud grade lumber.; Forintek Canada Corp. - Report; Finger Joints; Green gluing; Black spruce; Balsam fire; Technology transfer

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Automated wood failure evaluation technology transfer

https://library.fpinnovations.ca/en/permalink/fpipub1075

Author: Andersen, Axel W.

Date: April 1998

Edition: 37478

Material Type: Research report

Field: Wood Manufacturing & Digitalization

Author: Andersen, Axel W.

Date: April 1998

Edition: 37478

Material Type: Research report

Physical Description: 47 p.

Sector: Wood Products

Field: Wood Manufacturing & Digitalization

Research Area: Advanced Wood Manufacturing

Subject: Transfer; Testing; Plywood; Instrumentation; Gluing

Series Number: W-1514

Location: Vancouver, British Columbia

Language: English

Abstract: Wood failure evaluation is the key criterion for predicting the long-term durability of plywood. At present, the conventional visual method for plywood wood failure evaluation is slow and subjective. Evaluations can be influenced by factors such as: room lighting, wood species, sample treatment, and readings from prior samples. An automated wood failure evaluation system using image analysis techniques could potentially be programmed to consider all the variables and respond with consistent wood failure values regardless of the machine operator's experience level. This report describes the results of a six-month study in which a system for automated plywood wood failure determination was compared with conventional visual wood failure evaluation. It was built upon research undertaken in the 1996/97 year in which the feasibility of the approach was initially established. In the research reported previously, a colour optical imaging system was assembled and suitable wood failure algorithms were compiled with promising results. The imaging system was 100 % effective in reproducing sample values. The data were discussed with the project liaisons and a three-month comparison with Canply readings was suggested. In this study, machine evaluation of 4,150 samples was compared with readings of monthly plywood mill quality control samples. The sampling was designed to include all British Columbia plywood mills and all categories of commercial plywood production. The differences in average values for wood failure between human and machine evaluation were found to be less than plus or minus 5% in the majority of cases. In addition, 93 % of ‘set average' readings fell in the plus or minus 10% range of deviation expected of human wood failure readers. Agreement on readings of individual samples within each set was not quite as good with 72% falling in the plus or minus 15% range.; Technology transfer; Plywood - Gluing - Tests; Plywood - Tests - Control instruments; Instruments, Testing

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Automatic plywood wood failure evaluation based on image analysis/image processing

https://library.fpinnovations.ca/en/permalink/fpipub5529

Author: Andersen, Axel W.; Shi, X.; Salahuddin, U.; Zhong, Y.

Date: March 1997

Edition: 37443

Material Type: Research report

Field: Wood Manufacturing & Digitalization

Author: Andersen, Axel W.; Shi, X.; Salahuddin, U.; Zhong, Y.

Contributor: Canada. Canadian Forest Service.

Date: March 1997

Edition: 37443

Material Type: Research report

Physical Description: 32 p.

Sector: Wood Products

Field: Wood Manufacturing & Digitalization

Research Area: Advanced Wood Manufacturing

Subject: Testing; Plywood; Instrumentation; Gluing

Series Number: Canadian Forest Service No. 13;1053; W-1391

Location: Vancouver, British Columbia

Language: English

Abstract: Wood failure evaluation is the key criterion for predicting the long-term durability of plywood. At present, the conventional visual method for plywood wood failure evaluation is slow and subjective. Even experienced evaluators can show significant differences in their evaluations on the same plywood specimen and an individual evaluator can make different wood failure estimates on the same specimen at different times. Differences among evaluators can be as high as 50% for some samples. Evaluations can be influenced by room lighting, the wood species, sample treatment, and readings from prior samples. An automatic wood failure evaluation system using image analysis techniques could potentially be programmed to consider all the variables and respond with consistent wood failure values regardless of the experience level of the machine operator. This report describes the results of a one-year project in which a system for automatic plywood wood failure determination was investigated. A color optical imaging system was assembled and the preliminary work of compiling suitable algorithms was completed with promising results. The imaging system was 100% effective in reproducing individual sample values. Samples were sorted according to plywood type and test method to develop appropriate program algorithms for each category. The wood failure program was then further developed to automatically detect wood species and test method, thus avoiding the need for specimen separation prior to evaluation. Based on nearly 1200 samples in four categories, the differences in average values of wood failure between human evaluation and machine vision were found to be less than plus or minus 5%. In addition, a minimum of 85% of individual machine readings fell in the plus or minus 15% range of deviation expected of human wood failure readers. The imaging system was more accurate for light-colored specimens (i.e., Canadian Softwood Plywood) than darker-colored specimens (i.e., Douglas fir ) and for specimens where resin had been applied by spray. In order to make the imaging system more reliable and robust, the algorithm parameters now need to be fine-tuned based on a larger sample database.; Plywood - Gluing - Tests; Plywood - Tests - Control instruments; Instruments, Testing; Digital imaging; Defects - Detection

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1391.pdf

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Ammonium-based spent sulphite liquor binder optimization for waferboard and particleboard applications

https://library.fpinnovations.ca/en/permalink/fpipub1496

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Aqueous phenolic dispersions for bonding veneer components

https://library.fpinnovations.ca/en/permalink/fpipub1040

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Aqueous phenolic dispersions for bonding veneer composites. First of two reports

https://library.fpinnovations.ca/en/permalink/fpipub1038

Documents

Aqueous phenolic dispersions for bonding veneer composites. Supplemental report

https://library.fpinnovations.ca/en/permalink/fpipub1039

Documents

Aqueous phenolic dispersions for bonding wood composites

https://library.fpinnovations.ca/en/permalink/fpipub889

Documents

Aqueous phenolic dispersions for bonding wood composites - progress report

https://library.fpinnovations.ca/en/permalink/fpipub628

Documents

Assessment of new glue application technology for OSB

https://library.fpinnovations.ca/en/permalink/fpipub1051

Documents

Assessment of two green gluing processes for finger jointing

https://library.fpinnovations.ca/en/permalink/fpipub5074

Documents

Automated wood failure evaluation technology transfer

https://library.fpinnovations.ca/en/permalink/fpipub1075

Documents

Automatic plywood wood failure evaluation based on image analysis/image processing

https://library.fpinnovations.ca/en/permalink/fpipub5529

Documents