Plastic is inextricably linked with the filling of the base material, but the base material is a double-edged sword with a very specific usage. In the case of black base material, if the amount added is too great, the cost of the plastic product increases and the product's color is destroyed; if the amount is too little, the black base material with anti-aging additives and carbon black cannot be fully integrated. Therefore, the amount of black base material used is a crucial technical factor.

During the molding process of plastic products, almost everyone uses black masterbatch for coloring, anti-aging, conductive products, etc., and many issues encountered during use frequently trouble us. We now discuss some concerns that everyone has, hoping to bring you benefits.

What materials are the black masterbatch made of?

The materials that constitute the black masterbatch are: A. Carbon black; B. Carbon black carrier; C. Carbon black wetting agent; D. Carbon black dispersant; E. Other processing aids.

What are the outstanding aspects of the black masterbatch?

In the dyeing of plastic products, only 0.6%-0.8% of black masterbatch is needed to achieve a very dark color; adding more does not make it any darker. According to test data, if products used outdoors in Xinjiang require the black masterbatch to prevent aging, high-quality black masterbatch is sufficient (as opposed to using return carriers, wetting with white oil, or supplementing with calcium). The carbon black content in the product is 2-2.5%, which is 40% of the weight fraction of the masterbatch in every 100 kg of raw material, far exceeding any anti-aging product. The product lifespan can reach over 10 years. This is why Drip products, aquatic products, and communication cable products are all black. Additionally, carbon black contributes uniquely to the strength and conductivity enhancement of the products.

How to Judge the Quality of Black Masterbatch from Appearance?

Black masterbatch features medium gloss and hardness. If the oil appears too shiny, it indicates an excess of oil, while a dull sheen suggests the carrier is a reclaimed material or contains an excessive amount of calcium carbonate. The black masterbatch has been chewed by teeth, becoming brittle and soft. Excessive softness indicates an overabundance of organic dispersants, resulting in softness and looseness. Lower carbon black concentration and higher calcium carbonate content. Excessive brittleness signifies an overly high carbon black content, or that the carrier is reclaimed material.

What are the minor surface issues after using the black masterbatch?

If the speckles are sharp tips, it indicates that the product processing equipment has limited dispersion ability of the base material. The carbon black agglomerate particles in the base material cannot be evenly sheared, and a lower concentration black base material should be used; or there is an excess of calcium carbonate in the base material, and too much white oil is extruded through the single and double screw extruders under high pressure, forming small, non-dispersible hard lumps. If the speckles are concave, it is due to the volatilization of small molecules in the base material, indicating the presence of more white oil.