Abstract:

Four kinds of electrically conductive plywood(ECP) can be obtained by adding different conductive agents into urea-formalhedyhe(UF), and the area resistivity of glue films will be decreased below 100 ohm. When electric current flows through those films, the unevenness of the surface temperature distribution can be caused by the high-temperature area with electrods between veneers and the low-temperature corners and sides, but small size conductive particle can improve it. The studies indicate that the surface temperature can distribute evenly by mixing HF-2 type conductive agent with MG type diluent in UF. Not only will the temperature range of the central surface be decreasde below 4℃ with its variation coefficient less than 6%, but also the shear strength can be improved obviously.

Key words: Electrically conductive plywood(ECP), Electrically conductive agent, Area resistivity of glue film, Temperature distribution, Thermal inertia