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Review of standard test procedures for assessing the delamination resistance of solid wood bondlines

https://library.fpinnovations.ca/en/permalink/fpipub37740
Author
Lum, Conroy
Casilla, Romulo C.
Date
March 2005
Material Type
Research report
Field
Sustainable Construction
Author
Lum, Conroy
Casilla, Romulo C.
Contributor
Natural Resources Canada. Canadian Forest Service.
Date
March 2005
Material Type
Research report
Physical Description
119 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Veneer gluing
Veneer
Mechanical properties
Laminate product
Joints
Gluing
Glue
Series Number
Value to Wood No. FCC4;3924
W-2136
Location
Vancouver, British Columbia
Language
English
Abstract
A review of delamination/durability tests was conducted, and tests were selected for comparative study. Reduced catalyst levels affected phenol-resorcinol formaldehyde (PRF) and catalyzed polyvinyl acetate (PVA) bond durability. Wood moisture content (MC) at the time of bonding affected PVA durability, but not PRF. Growth rate and density affected Douglas-fir bond durability. Density did not affect the results of slow-growth lodgepole pine. In laminated wood, although all five delamination tests accepted conforming and rejected non-conforming PRF, only two tests rejected both non-conforming PRF and PVA. In fingerjoined lumber, delamination was sensitive to the final MC. Specimen length affected specimen-drying time, but its effect on delamination was not consistent. The NLGA delamination suggested lower bond durability than the WWPA durability-bending test.
Glue - Tests
Glue - Strength
Lumber, Laminated veneer
Glued joints - Strength
Veneers - Gluing
Gluing - Defects
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