<正>用四种相对湿度:=70、80、90、100％和四个温度水平:t=15、20、25、30℃,对橡胶木气干材和窑干材进行平衡处理,得知窑干材的平衡含水率比气干材低1.91～3.81％,比查“t——W”图得的平衡含水率值低2.77～4.11％。又窑干材的弦、径向吸湿膨胀系数分别为0.18％和0.11％,比气干材低0.06％和0.05％。两类试件在<85％时一般不长霉,=85～95％时表面轻度长霉,>95％时长霉严重。

The air-dried rubberwood and the kiln dried rubbervvood were treated respec: tively with 4 kinds of relative humidity: φ = 70, 80, 90, 100%, and with 4 kinds of temperature : t= 15, 20, 25, 30℃. The result showed that the equilibrium moisture content of the kiln-dried rubberwood was 1.91~3.81% lower than that of the air-dried rubberwood, and 2.77~4.11% lower than that from "t-φ-w" diogram. In addition, the swelling coefficient in tangential and radial direction with moisture absorption was 0.18% and 0.11% respectively, 0.06% and 0.05% lower than that of the air-dried rubberwood. No mildew occurred with φ<85%, slight mildew when φ= 85~95%,and heavy mildew when φ>95%. problems concerning mildew resistance and the necessity of kiln-drying for rubberwood were also discussed.