| 摘要 |
<p>A process for the manufacturing of floor elements, which floor elements comprises an upper decorative surface a lower surface, edges intended for joining and a core forming a carrying structure. A mixture of polyols, such as polyester or polyether, crude methylene diphenyl diisocyanate and possibly a small amount of blowing agent in a ratio forming a polymeric resin with a density in the range 600-1400kg/m3 is injected or casted into the mould, whereby a slightly porous or solid polyurethane core is formed. The polyurethane core is, possibly after surface treatment such as sanding, provided with an upper decorative surface and possibly a lower counter surface.</p> |
