| 摘要 |
The present invention relates to a core-sheath particle for use as a filler for feeder masses for the production of feeders, comprising (a) a carrier core having a size of 30μm to 500μm and composed of a material, which is resistant up to a maximum temperature of 1400° C. and contains no polystyrene, (b) a sheath surrounding the core composed of or comprising (b1) particles having a maximum D 50 value for grain size of 15μm and resistant up to a temperature of at least 1500° C., and (b2) a binding agent binding the particles to one another and to the carrier core, wherein the core-sheath particle is resistant to temperatures up to 1450° C. |
