Carbon black is used in the plastics industry to color products and provide various performance attributes. Among these performance factors, resistance to environmental conditions, especially UV radiation, is prominent. As is known, when plastic products are exposed to sunlight, the bonds in the plastic structure are damaged, leading to both color change and degradation of the product. This degradation shortens the lifespan of the plastic and leads to damage. The addition of carbon black pigment to the product helps to protect the plastic structure from damage by absorbing UV radiation, thus preserving the product.
Different types of carbon black have different UV protection properties. The most important parameter that enhances the UV resistance of carbon black is the particle size. The smaller the average carbon particle size, the higher the UV protection capacity of carbon black. Another important parameter is the distribution of carbon black in the product. As the particle size of carbon black decreases, it tends to form agglomerates, which are clumps. Agglomerate formation hinders the homogeneous distribution of carbon black in the product and leads to performance losses in the product, which is expected to provide UV resistance. Homogeneously distributed carbon black is more successful in capturing sunlight and providing the desired UV resistance and mechanical strength to the product, ensuring long-term performance.
Kabkom Kimya verifies and routinely tests the excellent environmental and UV resistance of its 2.5% carbon products, including KK-SICO682, KK-SICO481, SX-8450-HB, and SX-FR481, using its carbon black distribution analysis test device in the laboratory. The carbon black distribution test also demonstrates the extrusion performance of the sample.
Since carbon black is a difficult material to mix well, homogeneous distribution of carbon black implies excellent mixing and extrusion in production. This also means that this test also controls the overall quality of the product. The tests are carried out according to IEC EN 18553.
