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Addition of Boron Based Compound in the LVL Glueline: Effect on the Mechanical Properties and the Leaching of Boron
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Summary
This study aims at the optimization of the durability of Laminated Veneer Lumber (LVL) panels by
adding borates to the gluing formulation. Poplar veneers measuring 2.6 mm thickness were used for the
manufacture of LVL by Isoroy, a French company located in Lisieux. The melamine-urea-formaldehyde
(M.U.F.) glue formulations were mixed with various concentrations of boric acid. A 0.8% retention of
boron was measured in the LVL panel after intensive water leaching. The mechanical properties of finished
LVL panels and their bonding strength properties were evaluated. The influence of the glue bonding
on leaching was also evaluated. The amount of boron in LVL was measured by spectrocolorimetry
using the CIELAB system. Results demonstrated that the incorporation of boron in the glueline may
improve LVL durability.
Title: Addition of Boron Based Compound in the LVL Glueline: Effect on the Mechanical Properties and the Leaching of Boron
Description:
Summary
This study aims at the optimization of the durability of Laminated Veneer Lumber (LVL) panels by
adding borates to the gluing formulation.
Poplar veneers measuring 2.
6 mm thickness were used for the
manufacture of LVL by Isoroy, a French company located in Lisieux.
The melamine-urea-formaldehyde
(M.
U.
F.
) glue formulations were mixed with various concentrations of boric acid.
A 0.
8% retention of
boron was measured in the LVL panel after intensive water leaching.
The mechanical properties of finished
LVL panels and their bonding strength properties were evaluated.
The influence of the glue bonding
on leaching was also evaluated.
The amount of boron in LVL was measured by spectrocolorimetry
using the CIELAB system.
Results demonstrated that the incorporation of boron in the glueline may
improve LVL durability.
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