Black mother knowledge big inventory, plastic processing essential!
Black masterbatch plastic is inseparable from the filling masterbatch in the processing and production, but the filling masterbatch is a double-edged sword, and its dosage is very particular. As far as the black masterbatch is concerned, if the amount is too much, it will increase the cost of plastic products and destroy the color of the products; Add too little, anti-aging additives and black masterbatch of carbon black can not be fully integrated, so the amount of black masterbatch is an important technology.
In real life, the black mother should be used with anti-aging additives, and it is this mix and match that makes the anti-aging effect more significant, and also reduces the amount of black mother to a certain extent.
The amount added is too little, will cause the carbon black phase in the product produced discontinuous situation, in the combined boundary, the connection of plastic molecules will be very fragile, not tight, if subjected to ultraviolet radiation, carbon black will absorb a lot of heat products, accelerate the oxidation of products, in this case, the use of black masterbatch counterproductive, Becomes the impurities in the product.
6 main factors in determining the quality of black masterbatch
Black masterbatch is produced using carbon black, and the factors affecting the quality of black masterbatch are mainly reflected in the following six aspects:
First, the dispersion of carbon black is very difficult to deal with and dirty mixture, it is full of dust, light weight, fluffy. Unless large-scale treatment measures are adopted, it will dirty the machine and workers, and make the working environment dirty.
This factor is particularly important for masterbatches used in waste or recycled polymers, where the role of black is to cover other colors in the waste. Large particle carbon black has poor coloring ability and is not easy to cover all the other colors in the lower layer, resulting in the final product only getting a deviated color. During the melting process, the ability to correctly select the carbon black with high coloring power to cover the existing color is known as overlay power.
Three, rheology if a color masterbatch itself has good dispersion, but it can not flow into the material to be molded, the production effect is not ideal. Generally speaking, the base resin used for the production of color masterbatches has a high rheology. To save costs, some masterbatch producers use reused materials, scrap or recycled materials as resin carriers.
Compatibility If the masterbatch is produced using chips or recycled materials, it may contain contaminants or other non-meltable polymers. This will cause some unpredictable and difficult trouble, wasting the time and raw materials of the end consumer. At this time, you can choose the base resin to produce high-quality masterbatch, masterbatch in the melting process to have good compatibility. High quality masterbatches can be produced using LLDPE, LDPE, HDPE, PP, PS, SAN, PA and other materials.
Five, stability in today's international economy, international customers on the quality of the masterbatch, the stability of raw materials and other requirements are absolutely necessary, which is also the fifth factor to determine the quality of black masterbatch. One of the main manifestations of stability is the stable carbon black ratio. If the percentage of carbon black is fluctuating, then the number of masterbatches that need to be melted is not the same, and it is impossible to produce the same hue. Six, color brightness on the market there are various types of carbon black can be used for color masterbatch coloring, but all kinds of color and price are also very different. Large particle carbon black has lower coloration and different background color than small particle carbon black. Large black masterbatches are suitable for production of films such as garbage bags, but are not suitable for production of products that focus on aesthetics, such as TV signs or where UV protection is required such as agricultural films or external pipes.
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