Gluing Characteristics of Determa

Using plywood shear and block shear tests, the gluing properties of the tropical wood determa (Ocotea rubra Mez) were determined using phenol-formaldehyde, resorcinol- formaldehyde, urea-formaldehyde, melamine-formaldehyde, and casein glues. Other variables include assembly time (five levels), glue viscosity (four levels), and glue spread (single and double). With the exception of casein, increased assembly time did not improve glue bond quality. Except for phenol formaldehyde, satisfactory bonds developing maximum wood strength can be obtained with all glues used in this study; (a chemical incompatibility apparently exists between phenol-formaldehyde and the wax-like substance in determa). Determa can be classified as an easy wood to glue with resorcinol-formaldehyde.

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