| 摘要 |
Particles of expanded polystyrene (EPS) are disclosed, in particular having up to 20 mm, preferably smaller than 10 mm and especially smaller than 2 mm, useful as levelling fillers. The invention is characterised in that the particles are coated with plaster. In one embodiment, the surface of the particles is hardened by a thermal treatment. The disclosed process for producing such EPS particles is characterised in that the EPS particles are wetted with a mixture of water and glue, in particular wallpaper glue. The particles of plaster powder are then added in two steps, the plaster powder and EPS particles being mixed after each step. |
