| 摘要 |
<p>A composite product has a fibrocrystalline heterogenous structure consisting of: on the one hand a plurality of fibres of expanded specific surface area and of hydrophilic character, having a substantial quantity of microfibrils on their surface, and on the other hand crystals of precipitated calcium carbonate, organised essentially in clusters of granules, the majority of which trap the microfibrils and are jointed directly thereto by mechanical bonding. Application to the field of construction materials and papermaking is described. The fibres may be of natural or synthetic cellulose material or acrylic. The calcium carbonate may be precipitated by introducing carbon dioxide to an aqueous suspension of the fibres and of lime.</p> |
