Durability of Radio-Frequency Bonded Urea Resin Joints

Describes a study to determine whether rapid curing of urea-resin joints by dielectric heating affects the durability of the joints. Results showed no significant difference between pieces bonded by dielectric heating and hot-pressed pieces. Yellow birch at a moisture content of 6 percent and a typical urea resin glue were used to prepare edge-glued joints. Dielectric heating periods of 2, 1, l/2, and 1/4 minutes were used. The hot press samples were bonded at a platen temperature of 212?F. All joints were considered highly satisfactory after accelerated aging tests.

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