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23 records – page 1 of 3.

An evaluation of lumber spray boxes at a coastal British Columbia sawmill

https://library.fpinnovations.ca/en/permalink/fpipub41115
Author
Groves, C. Kevin
Johnson, E.L.
Date
June 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Groves, C. Kevin
Johnson, E.L.
Date
June 1993
Material Type
Research report
Physical Description
5 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Spraying
Preservatives tests
Preservatives
Series Number
1743K202
W-1177
Location
Vancouver, British Columbia
Language
English
Abstract
Mould and stain became troublesome problems on lumber manufactured at a coastal British Columbia sawmill, and the difficulties were suspected to be a fault of the mill's antisapstain treatment. Forintek technical staff visited the sawmill and planer mill and used two procedures to gather assessment. Firstly, boards were pulled from spray box chains after spray treatment and one-inch square samples were punched from four faces of these boards for chemical analysis of DDAC, one of the active ingredients in the formulation being used. With a large number of samples, this procedure quantitatively assessed DDAC retention levels at points along boards. Secondly, fluorescent dye was added to the spray solutions and special paper strips were stapled along the length of boards prior to treatment in the spray box. The paper strips were then retrieved for examination under ultraviolet light. This procedure is largely a qualitative one, showing the pattern of spray coverage over the whole board. Liquid samples of the treatment solutions were taken from both the sawmill and planer cross chain day tanks to determine their DDAC concentrations.
Spraying
Preservatives - Tests
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Applicateurs de phytocide montés sur abatteuses-groupeuses et abatteuses-façonneuses

https://library.fpinnovations.ca/en/permalink/fpipub299
Author
Desrochers, Luc
Ryans, Mark
McPhee, Brent
Makkonen, Ismo
Date
December 1999
Edition
36529
Material Type
Research report
Field
Fibre Supply
Author
Desrochers, Luc
Ryans, Mark
McPhee, Brent
Makkonen, Ismo
Date
December 1999
Edition
36529
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Spraying
Application
Feller
Series Number
Communiqué technique ; Abattage-CT-000029
Language
French
Abstract
Lutte contre la végétation concurrente
Application de phytocide
PULVÉRISATEURS MONTÉ SUR ABATTEUSES-FAÇONNEUSE
Abatteuses-groupeuses
ABATTEUSES-FAÇONNEUSES A TETE MULTIFONCTIONNELLE
Pulvérisateur Avenor-FERIC pour abatteuse-groupeuse
Pulvérisateur Droppen R-500
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Assessment of a transverse antisapstain chemical spray system

https://library.fpinnovations.ca/en/permalink/fpipub4199
Author
Byrne, Anthony (Tony)
Smith, R.S.
Daniels, C. Robert
Minchin, D.
Date
August 1988
Edition
40940
Material Type
Research report
Field
Sustainable Construction
Author
Byrne, Anthony (Tony)
Smith, R.S.
Daniels, C. Robert
Minchin, D.
Date
August 1988
Edition
40940
Material Type
Research report
Physical Description
7 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Stain fungal
Stain
Spraying
Series Number
17-43-K-104
W-607
Location
Vancouver, British Columbia
Language
English
Abstract
Spraying
Stains - Fungal - Control
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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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Effect of spray pressure on lumber chlorophenate retentions using a sawmill, longitudinal spray tunnel

https://library.fpinnovations.ca/en/permalink/fpipub41050
Author
Smith, R.S.
Byrne, Anthony (Tony)
Date
April 1988
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Smith, R.S.
Byrne, Anthony (Tony)
Date
April 1988
Material Type
Research report
Physical Description
9 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Spraying
Pressure
Preservation
Series Number
17-43-K-208
W-553
Location
Vancouver, British Columbia
Language
English
Abstract
Spraying
Preservation - Non pressure processes - Brushing and spraying
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Electrodyn spray application technology for lumber

https://library.fpinnovations.ca/en/permalink/fpipub41039
Author
Smith, R.S.
Date
November 1986
Material Type
Research report
Field
Wood Manufacturing & Digitalization
n crop spraying. Several f a c t o r s c o n t r o l the l i q u i d atomization. These include
Author
Smith, R.S.
Date
November 1986
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Spraying
Pressure
Preservation
Series Number
02-17-43-104
W-480
Location
Vancouver, British Columbia
Language
English
Abstract
Electrodyn
Spraying
Preservation - Non pressure processes
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Electrodyn spray application technology for lumber

https://library.fpinnovations.ca/en/permalink/fpipub41066
Author
Johnson, E.L.
Clark, Jean E.
Smith, R.S.
Date
March 1990
Material Type
Research report
Field
Wood Manufacturing & Digitalization
and shipping. Treatments done by dipping and by hydraulic spraying have proven unsatisfactory over the years
Author
Johnson, E.L.
Clark, Jean E.
Smith, R.S.
Contributor
BC Science Council
Date
March 1990
Material Type
Research report
Physical Description
32 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Spraying
Pressure
Preservatives tests
Preservatives
Preservation
Series Number
1771K402
W-925
Location
Vancouver, British Columbia
Language
English
Abstract
Research to commercialize ultra-low-volume charged-drop spray application technology for the fungicidal protection of unseasoned lumber during transit and storage is described. Tests were made to establish the feasiblity of using the Electrodyn spray in a commercial setting and a field test investigated the efficacy of treatments and chemicals applied.
Preservatives - Tests
Spraying
Preservation - Non pressure processes - Brushing and spraying
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Electrostatic application of powdered PF resin to OSB furnish

https://library.fpinnovations.ca/en/permalink/fpipub37475
Author
Groves, C. Kevin
Date
April 1998
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Groves, C. Kevin
Date
April 1998
Material Type
Research report
Physical Description
17 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strandboards
Spraying
Oriented strandboard
Orientation
Gluing
Series Number
W-1504
Location
Vancouver, British Columbia
Language
English
Abstract
Research was carried-out to investigate the feasibility of electrostatically applying PF powder resin to OSB furnish to improve resin distribution and thereby improve panel properties. Research elsewhere has shown that resin distribution is an important factor affecting panel properties including internal bond strength and thickness swell. It was theorized that electrostatic charging would distribute resin more uniformly on strands compared to conventional application techniques and would help to strengthen the bond between resin and strands thereby minimizing resin losses and allowing for greater levels of resin to be retained on OSB furnish. Small-scale tests were conducted in Forintek's Vancouver laboratory followed by pilot plant tests at the Alberta Research Council (ARC) which involved electrostatically charging resin and aspen furnish in a pilot plant blender. Lab results showed that the average amount of resin retained by strands (retention) increased with electrostatic application compared to control applications. During pilot plant tests, image analysis results showed that resin coverage increased using electrostatics. Also, the coefficient of variation in resin coverage was lower for electrostatic applications compared to the controls. However, contrary to previous research findings, test panels made from electrostatic and control batches in a pilot plant did not show any significant differences in internal bond and thickness swell properties. Electrostatic application of powdered PF resin does not appear to sufficiently improve resin distribution in aspen to affect panel properties. Although pilot plant results were not promising, lab tests have shown that electrostatic application techniques are sensitive to material properties and that other wood species may be more suitable for charging than aspen. Further research will be continued at Forintek's eastern lab in the 1998/99 year to investigate electrostatic application of resins to mixed hardwood species.
Spraying
Oriented strandboard - Gluing - Tests
Gluing - Processes
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Essai d'un concept d'écraseur-pulvérisateur en Nouvelle-Écosse

https://library.fpinnovations.ca/en/permalink/fpipub36812
Author
Desrochers, Luc
Material Type
Research report
Field
Fibre Supply
Author
Desrochers, Luc
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Treatment
Spraying
Slash treatment
Slash
Residues
Application
Series Number
Communiqué technique ; Sylviculture-CT-000094
Language
French
Abstract
Forest residues
Slash treatment
Crushing
Herbicides
Ground application
Spraying
CRUSHER-SPRAYERS
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Feasibility study : electrostatic spray application of adhesives to OSB and plywood

https://library.fpinnovations.ca/en/permalink/fpipub37378
Author
Groves, C. Kevin
Troughton, G.E.
Date
May 1995
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Groves, C. Kevin
Troughton, G.E.
Date
May 1995
Material Type
Research report
Physical Description
15 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Strandboards
Spraying
Plywood
Oriented strandboard
Orientation
Gluing
Series Number
W-1204
Location
Vancouver, British Columbia
Language
English
Abstract
An investigation was made to determine the feasibility of electrostatically spraying adhesive on strands and veneer for the purpose of improving adhesive bonding efficiency. If electrostatic spray treatment could improve coverage uniformity on the composite product compared to conventional spray application, then theoretically bond strength should improve, allowing for adhesive quantities normally required for production to be reduced. Estimates for a 5% reduction in the annual adhesive requirement for an OSB mill producing 300 million square feet on a 3/8" basis amounts to a $300,000 saving. Tests carried out at Forintek examined the fundamental interactions between charged water spray and strands and veneer to determine whether coverage characteristics could be improved. Laboratory set-ups included fitting Forintek's lab blender with electrostatic spray equipment and a vertical tube assembly for investigating charged spray interaction with free-falling strands. Since most commercial applicators spray free-falling strands within a blender, our first objective was to investigate how strand coverage would be effected within such an environment. Test results showed that coverage on strands electrostatically treated within the blender was not significantly different than non-charged applications. This was probably due to the free-falling strands not being adequately grounded when treated. These results are consistent with theory which states that targets should be grounded for spray coverage improvement to occur. To further test this theory, using a vertical plastic tube apparatus, individual strands were tethered by a fine ground wire and then allowed to free-fall through a charged spray, resulting in dramatic increases in coverage compared to uncharged tests. Although grounding strands within a blender may at present be unpractical, methods for momentarily grounding the strands within the blender should be investigated. Also, alternatives for applying adhesives within a blender, that allow for proper strand grounding, should be considered. Following spray tests with OSB, tests were conducted to treat veneer with electrostatic spray. A 50/50 mixture of resin and water was electrostatically applied to veneers and results showed that although coverage was improved, both in uniformity and quantity, the size of drops was considerably smaller that what is recommended for optimum bonding. In theory, to apply a charged spray consisting of larger drops would significantly reduce the effects of electrostatic forces on droplet trajectory and therefore, further tests to apply resin to veneer were discontinued.
Spraying
Oriented strandboard - Gluing - Tests
Plywood - Gluing - Tests
Gluing - Processes
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23 records – page 1 of 3.