| 摘要 |
Two rubber sheets are used in the production of slabs of granulate or fine particles of stone material bonded with hardening resin, one of said sheets, the lower one, being provided with a border delimiting the cavity for deposition of a metered quantity of mixture. At least the lower sheet and preferably both sheets have a structure consisting of two layers of EPM or V KF or PU rubber between which a layer of fabric or cloth of non-deformable material, such as polyamide or polyester, is interposed or inset and the outwardly directed surface of the sheet is composed of a similar layer of fabric or cloth. The composite sheet can be stabilised dimensionally by mean s of heat treatment at a temperature higher than the operating temperature.</S DOAB>
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