摘要
脲醛树脂中分别添加三种导电剂压制导电胶合板，可使胶层面积电阻率降至１００Ω以下。导电胶合板外加低电压时，板面温度分布的不均匀性主要来自电极处的高温区和板子边角处的低温区，小粒度的导电剂可以改善这一不均匀性。研究表明：在添加ＨＦ－２型导电粉和混加ＭＧ型稀释剂的条件下，板面温度分布均匀，中央区域的温度极差小于４℃，变异系数小于６％，并有利于改善板子的胶合强度。
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 64%, but also the shear strength can be improved obviously.
出处
《林业科学》
CAS
CSCD
北大核心
1995年第3期254-259,共6页
Scientia Silvae Sinicae
关键词
导电胶合板
导电剂
胶层面积电阻率
温度分布
Electrically conductive plywood(ECP), Electrically conductive agent, Area resistivity of glue film, Temperature distribution, Thermal inertia
