| 摘要 |
A method is disclosed which consists of overlying a mat (M) of glass fibre with a sheet (F) of a very low density expanded polymeric material, such as Moltoprene, of spraying said sheet with an expansible two-component resin (E), isocyanate polyol, and of subjecting the whole to pressing in an embossed surface mould which forms the exposed surface of the finished product. |
