Author |
Goto, Teruo
Shinohara, Teizo
Sakuno, Tomoyasu
|
Description | Beech and lauan plywood glued with phenol-resin adhesive or melamine-resin adhesive were exposed to boil and dry repeating cycle and to continuous boiling. Glue-joint durability of these plywoods was studied by means of the microscopic observation of glue-line and tension shear test.
The following conclusion may be drawn from the experiments. 1 ) Surface check and end check of plywoods occured from the boundary of compound ray. These caused the delamination of glue-line of plywood. 2 ) Delamination of glue-line occured from the end of compound ray and the latewood adjacent to the glue-line, and also from the lathe check of veneer. 3 ) The glue-joint strength of plywood glued with phenol-resin adhesive gradually decreased as the exposure to boil and bry repeating cyele proceeded. This phenomenon was caused mainly due to the deterioration of adherend. 4 ) The glue-joint strength of plywood glued with melamine-resin adhesive decreased rapidly toward twelve cycles, and then it was no longer observed. The deterioration of adhesive was chiefly responsible to this phenomenon. |
Journal information |
Bulletin of the Faculty of Agriculture, Shimane University
2
, 92
- 98
, 1968-12-15
|
Publisher | 島根大学農学部
|