Quality Requirements For Conductive Carbon Black Used In Chemical Fibers（2）

2. Dispersibility
The dispersion performance of carbon black refers to the difficulty of a certain type of carbon black being wetted by the color master batch carrier resin and dispersing the agglomerates. This performance mainly depends on the strength of the agglomerate, which is the energy required to disperse the agglomerate into a single aggregate. The use of appropriate coupling agents or special surface treatment methods is the key to improving the dispersion performance of carbon black.
An excellent antistatic agent should have good dispersibility. This requires that carbon black particles can be evenly and high-density distributed in the fiber matrix, and that carbon black particles have appropriate compatibility and good rheological matching performance with the fiber matrix. This not only improves the spinnability of the fiber, but also improves the stability of the physical and mechanical properties of the finished fiber. Carbon black particles exist in discontinuous dispersed phases in the fiber matrix, and the distance between each particle should be as small as possible to form a conductive path inside the fiber, Avoiding high resistance in the fiber pathway facilitates the rapid dissipation of charges, thereby achieving efficient anti-static and conductive effects.
3. Particle size and distribution
The particle size of carbon black directly affects the spinnability and conductivity of fibers, as well as the filtration and dispersion properties of carbon black. Research has shown that particle sizes greater than 20 μ The coarse carbon black particles of m will cause a rapid increase in spinning component pressure, making spinning unable to proceed normally; Particle size between 5-10 μ The finer carbon black particles of m will cause spinning breakage, drifting, etc; Particle size ranging from 1 to 5 μ The fine carbon black particles of m will cause the formation of filaments during the fiber stretching process. Therefore, the particle size of conductive carbon black should be less than 1 μ m. And the particle size distribution must be uniform to minimize the wear of carbon black particles on spinning components, extruders, and other equipment as much as possible.