Abstract:

In order to clarify the rules of humidity conditioning function of interior wall materials, the temperature, relative humidity and logarithm of absolute humidity in a box (20cm×20cm×30cm), which was constructed of steel plates and lined with an experimental material on its floor, were measured at a certain time when its ambient temperature was changed from 20℃ to 33℃.The experiments showed that the logarithm of h was represented approximately by a linear equation of temperature T, and the degree of humidity conditions could be evaluated by the slope (b) of the equation.The b values were used to classify the tested interior wall materials such as plywood, particleboard, fiberboard and so on.The value b of linden plywood tended to increase nonlinearly with the increasing ratio of the area (A) occupied by the wall material to the volume (V) of the steel box (A/V).The value b of linden plywood covered with polyurethane coating was about 2/3 of the uncovered.At the beginning of the rise of the ambient temperature, the different changing tendency of relative humidity was observed between wood-based materials and synthetic of inorganic ones.

Key words: Wood-based interior wall material, Humidity conditions, Relative humidity