Quality Requirements For Conductive Carbon Black Used in Chemical Fibers（1）

The presence of carbon black in fibers inevitably affects the production process and product quality of fibers. Therefore, it is necessary to have a comprehensive understanding of the performance, quality requirements, and application process of carbon black for fibers, in order to ensure the smooth production process of synthetic fibers and ensure that the final product has good anti-static and conductive properties.
According to the production process of fiber products and the requirements for the final product performance, the main considerations are the particle size, particle size distribution, dispersibility, color strength, and other properties of carbon black. If these factors are not properly considered, they not only affect normal spinning, but also affect the physical and mechanical properties of carbon black conductive composite fibers. Here is a brief introduction to each indicator.
1、 Quality requirements for carbon black for antistatic and conductive fibers
At present, most carbon black anti-static and conductive fibers are prepared by melt spinning method, while some are obtained through surface post-treatment. Among them, the melt spinning process has high requirements for the quality of carbon black, and the performance of carbon black can be evaluated through the following indicators.
1. Filterability
In the fiber production process, the service life of the filter material can be characterized. In industrial production, two types of filtration systems are mainly used: one is the central filtration system, which is a dual filtration system with two interchangeable filters and metal filters inside the container; The second is the spinning component filter, which is usually a component filled with metal powder and installed in front of the spinneret. If the carbon black particles are large or the particle size distribution is uneven, it is easy to block the central filter and spinning component filter. This not only increases the frequency of replacing and cleaning the central filter and spinning component filter, but also increases production costs such as filter cleaning, screen replacement, labor, production stoppage, and waste. More importantly, frequent interruptions in production can lead to a decrease in production capacity and fluctuations in product quality.