Parameter | Description |
Chemical Composition | Primarily CaCO₃ with minimal impurities |
Particle Size | Typically ranges from 0.5 to 5 µm (micron), customizable based on application needs |
Brightness | Typically above 90% (ISO brightness), significantly enhances paper aesthetics |
Opacity | High scattering ability, effectively increases paper opacity and reduces show-through |
Bulk Density | Typically around 0.5-0.7 g/cm³, affects filler loading and paper density |
Oil Absorption Value | Indicates the filler's ability to absorb and retain oils, important for ink absorption and printability |
Whiteness | High whiteness levels contribute to the overall cleanliness and purity of the paper |
pH Value | Generally neutral, ensures compatibility with paper pulp and avoids chemical reactions that could affect paper quality |
Moisture Content | Typically low, around 0.1-0.5%, to avoid affecting paper machine operation and paper properties |
Consistency and Reliability | Uniform particle size distribution and chemical purity ensure consistent performance in paper production |
Environmental Impact | Naturally occurring and renewable, reduces reliance on forest-derived fibers, contributing to sustainability |
Ground calcium carbonate (GCC) is a widely used mineral filler in the paper industry, renowned for its ability
to enhance paper brightness and opacity.
1. High Brightness and Whiteness: GCC offers exceptional brightness and whiteness levels, typically above 90%, which can significantly improve the visual appeal of paper products. This is crucial for applications where aesthetics and readability are paramount, such as printing and packaging.
2. Opacity Enhancement: GCC particles effectively scatter light, increasing paper opacity. This makes GCC an ideal choice for producing high-quality printing papers that minimize show-through and ensure clear, distinct images and text.
3. Cost-Effective Solution: GCC is abundant and relatively inexpensive, making it a cost-effective alternative to other fillers. It allows paper manufacturers to reduce raw material costs while maintaining or improving paper quality.
4. Improved Printability: GCC enhances paper's ink absorption capabilities, leading to better ink holdout and faster drying times. This results in sharper, cleaner prints and reduced ink smearing, which is essential for high-speed printing processes
5. Environmental Benefits: GCC is a naturally occurring, renewable resource. Its use in paper production reduces the reliance on forest-derived fibers, contributing to sustainability and reducing environmental impact.
6. Consistency and Reliability: GCC's consistent particle size distribution and chemical purity ensure uniform filler dispersion in paper pulp, leading to consistent paper quality and performance.
