| Classification: | Calcium Carbonate Powder |
|---|---|
| Other CAS No.: | 471-34-1 |
| Application: | in Special Catalyst and Phosphors. |
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| Nano-active calcium carbonate as a functional nano-active reinforcing material has been successfully applied to neoprene (CR), chlorinated polyethylene (CM), neoprene compound (alloy rubber), EPDM (EPDM) ), EVA rubber, etc. |
| Neoprene is widely used as the outer sheath material of coal mine cables and marine cables due to its excellent flame retardancy, oil resistance, high elasticity and flexibility, but its compatibility with fillers is poor, the appearance of the product is rough, and the friction is It is easy to be vulcanized in advance, such as adding 25phr of nano-calcium carbonate, it can obviously improve the smoothness and softness of its appearance, at the same time, the scorch time can be extended by more than 30%, and the tear resistance is also significantly improved. / mm above), especially suitable for the outer sheath material formulation of cables used in harsh environments. |
| EPDM is mainly used as a skeleton material for insulation materials in the cable industry. With the increase of cable life and heat resistance requirements, it is more widely used. EPDM rubber has poor self-adhesiveness, poor mixing and extrusion processability; at the same time, low raw rubber strength, difficult feeding, and low production efficiency; and low vulcanized rubber strength, which brings certain difficulties to product development and processing. Nano calcium carbonate can make up for the shortcomings of EPDM in the above aspects. The test proves that the filling amount of nano-calcium carbonate in EPDM rubber with high filling property (301T of Kejua) can reach more than 200phr, and the content of rubber is below 25%, which can still meet the requirements of cable insulation performance index, and guarantee Good mixing and extrusion process performance, while ensuring the electrical performance requirements of the product. It is used in the general EPDM grades (J4045, TER4044, R5015, EP21) of the cable. It is added with the ratio of talc powder 1: 1, the content of rubber is 38%, its tensile strength is above 8Mpa, and the elongation at break More than 330%, both indicators can reach more than double that of ordinary reinforcement materials. |
| In the chlorinated polyethylene rubber that has developed rapidly in recent years, nano-calcium carbonate also plays a role as its functional material. As the main reinforcing material of chlorinated polyethylene rubber, white carbon black has a Mooney viscosity of more than 100 when the added amount reaches 40 phr. Although the mechanical properties are greatly improved, the mixing is difficult and the extrusion current is too large during extrusion And it is very easy to vulcanize in advance. When 20 phr of white carbon black and nano-calcium carbonate are added, the mechanical properties change little, and the Mooney viscosity drops by more than 35. At the same time, the appearance of the vulcanized products is smooth and delicate, and the elasticity is better. |
| Index | CaCO3 |
| Appearance | White Powder |
| Specific Gravity g / cm3 | 2.5-2.6 |
| Bulk Density g / ml | 0.68 |
| Whiteness % | ≥96 |
| Average Particle Size(nm) | 15-40, 60-80 |
| Particle Shape | Cube |
| BET(m2/g) | ≥40, 20-40 |
| PH (10g dissolved in 90ml water) | 8.0-9.0 |
| Moisture% | ≤0.5 |
| CaCO3(%) | ≥94.5 |
| Activation Rate% | ≥95 |
| MgO(%) | ≤0.5 |
| Oil Absorption Value(g/100g) | ≤33 |
| LOI(%) | 45 |
| Surface Treatment Agent | Compound treatment agent |
| Packing: | 50KGs Iron Drum or 1000KGs Jumb Bag or packing as per request. |
| Storare: | Storing in sealed, dry and cool condition, not exposing to air for long time, avoiding moisture. |
| Characteristics: | Pink powder, slightly soluble in inorganic acid, insoluble in water. |
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