| 摘要 |
A process for the production of a grinding foam body composite, especially of a homogeneous, elastic, microcellular grinding foam body, based on a fibre fleece containing a grinding agent and on a polyurethane foam, wherein onto the fibre fleece containing a grinding agent there is superficially applied a liquid, solvent-free NCO-terminated polyurethane pre-polymer, the coated fleece is assembled to give a formed body and the formed body obtained is polymerised by foam-forming chain elongation, an additional elastic fixing of the grinding agent on the fleece fibres thereby being brought about, the foamed structure formed in the resulting grinding foam body having at least 80% of micropores with a diameter of from 0.1 to 10 mu m. and a fine foam coating on the fibres with a layer thickness of 0.5 to 10 mu m. of at least 90% of micropores with a diameter of 0.05 to 3 mu m. |
