| 摘要 |
The invention relates to a gypsum-fibre composite product, wherein the gypsum appears as crystals on the surface of the fibre and wherein the gypsum crystals are obtained by mixing a water soluble calcium compound and a water soluble sulphate compound with an aqueous fibre suspension such that the calcium compound and the sulphate compound react to form gypsum crystals. The invention also relates to a process for the preparation of the gypsum-fibre composite product. The composite product can be used as a filler or coating pigment in the production of paper. |
