| 摘要 |
An object is to provide a composite board of plaster and inorganic fiber excellent in fire resistance, provided with sound-absorbing property, which is absent from a plasterboard, and heat insulating property, light in weight, and high in dimensional stability to humidity change. <??>The composite board of plaster and inorganic fiber is provided, which is characterized in that the proportion of the inorganic fiber ranges from 20 to 70%by weight with respect to the total weight of the composite board. Since the composite board of the present invention contains inorganic fiber, it becomes a lightweight plasterboard and excellent in sound absorbing property. In addition, since the composite board of the present invention uses plaster, which is excellent in dimensional stability, as a binder, it is excellent in dimensional stability to humidity change compared to a rock wool decorative sound-absorbing board using a large amount of starch as a binder. <IMAGE> |
