Plastic processing and production is inseparable from filler masterbatch, but filler masterbatch is a double-edged sword, and its dosage is very particular. In the case of black masterbatch, if the amount is added too much, it will increase the cost of plastic products and destroy the color of the products; The amount of addition is too small, and the anti-aging additives and the black masterbatch of carbon black cannot be fully integrated, so the dosage of black masterbatch is an important technology.
In real life, black masterbatch manufacturers should be used in conjunction with anti-aging additives, and it is this kind of mixing and matching that makes the anti-aging effect more significant, and also reduces the dosage of black masterbatch to a certain extent.
The amount added is too small, will cause the carbon black phase in the product discontinuity, at the demarcation of the combination, the connection of plastic molecules will be very fragile, not tight, if irradiated by ultraviolet rays, carbon black will absorb a large amount of heat of the product, accelerate the oxidation of the product, in this case, the use of black masterbatch is counterproductive, become the impurity in the product.
Black masterbatch is produced using carbon black, and the factors that affect the quality of black masterbatch are mainly reflected in the following six aspects:
1. Dispersion raw carbon black is a very difficult and dirty mixture, it is dusty, light and fluffy. Unless large-scale treatment is employed, it can stain machines and workers, making the working environment dirty.
2. Covering power is especially important for masterbatches used for scrap or recycled polymers, where the role of black is to cover other colors in the scrap. Large carbon blacks have poor colorability and do not easily cover all other colors in the lower layer, resulting in a final product that only gets a color that is off. The ability to correctly select carbon black, which has high coloring ability, to cover the existing color first during the melting process is known as covering the existing color.
3. Rheology If a masterbatch itself has good dispersion, but it cannot flow into the material to be cast, the production effect is not ideal. In general, priming resins used in the production of masterbatches have high rheology. To save costs, some masterbatch producers use reused materials, scrap or recycled material as resin carriers.
4. Compatibility If the masterbatch is produced using chips or recycled materials, then it may contain contaminants or other non-meltable polymers. This can cause some unpredictable and uncontrollable troubles, wasting the time and raw materials of the end consumer. At this time, priming resins can be used to produce high-quality masterbatches, which have good compatibility during the melting process. High-quality masterbatches can be produced using LLDPE, LDPE, HDPE, PP, PS, SAN, PA and other materials.
5. StabilityIn today's international economy, it is absolutely necessary for international customers to have high requirements for the quality of masterbatch and the stability of raw meal, which is also the fifth factor that determines the quality of black masterbatch. One of the main manifestations of stability is a smooth carbon-black ratio. If the percentage of carbon black fluctuates, then the amount of masterbatch that needs to be melted is not the same, and it is not possible to produce a product of the same shade.
6. Color brightness and shade There are various types of carbon black on the market that can be used for coloring masterbatches, but the colors and prices of various types are also very different. Large-particle carbon black has a lower coloration and a different base color than small-particle carbon black. Large black masterbatches are suitable for the production of films such as garbage bags, but not for the production of products that are aesthetically pleasing, such as television signs or where UV protection is required, such as agricultural films or external pipes.