In the field of color masterbatch production, the addition of paraffin wax and PE wax can improve the flowability of polymer material systems. By improving the wettability and dispersion of pigments and other additives, the processing performance can be improved to varying degrees, which is beneficial for improving production efficiency and the apparent gloss of extruded products. Therefore, many factories use paraffin wax with a melting point of around 60 ℃ as a dispersant or in combination with polyethylene wax to increase production and reduce costs. Now we observe the performance differences between the two from the perspective of practical applications in color masterbatch processing.

(1) Thermal performance
The lubricating dispersant used for color masterbatches must be able to withstand the processing temperature well and maintain material thermal stability during the manufacturing of color masterbatches and the molding of colored products; Otherwise, the dispersant used for gasification or decomposition will have a negative impact on the performance of the color masterbatch or product. The processing temperature of color masterbatches and products is generally between 160-220 ℃. We conducted isothermal thermogravimetric experiments on polyethylene wax and paraffin wax with a melting point of 60 ℃. The results showed that below 200 ℃, paraffin wax pushed 9.57% of its weight within 4 minutes, and weight loss reached 20% within 10 minutes. From the perspective of heat resistance alone, polyethylene wax can exhibit excellent heat resistance, while paraffin wax is difficult to guarantee. Therefore, paraffin wax is not suitable for use as a color masterbatch dispersant.

(2) Dispersion performance
To compare and determine the dispersion properties of pe wax and paraffin wax, black masterbatches were prepared with different concentrations of the two, and thin film blackness tests were conducted. In the addition ratio of 0-7%, the black masterbatch steadily increased by 36.7% with the increase of polyethylene wax content, indicating that the higher the polyethylene wax content, the better the dispersion performance of carbon black; However, in the same addition ratio, the black masterbatch decreased by 19.9% with the increase of paraffin, indicating that the higher the paraffin content, the worse the dispersion performance of carbon black.
This is because compared to pe wax, paraffin wax is more prone to wetting carbon black, but at the same time, it significantly reduces the viscosity of the system. The low viscosity greatly weakens the transmission of shear force and interferes with dispersion. Carbon black is coated by the surface of paraffin, forming larger particle carbon black aggregates. Obviously, this hindering effect on dispersion greatly exceeds its weakening effect on the cohesion of aggregates.

Therefore, the comparison of experimental results indicates that polyethylene wax has a good lubricating and dispersing effect on carbon black, while in the color masterbatch, the carbon black added with paraffin wax will significantly deteriorate.
For more details, please consult us!                             inquiry
Qingdao Sainuo Group. We are manufacturer for PE wax, PP wax, OPE wax, EVA wax, PEMA,EBS,Zinc/Calcium Stearate…. Our products have passed the REACH, ROHS, PAHS, FDA testing.
Sainuo rest assured wax, welcome your inquiry!
E-mail：sales@qdsainuo.com
               sales1@qdsainuo.com
               sales9@qdsainuo.com
Adress：Biulding No 15,Torch Garden Zhaoshang Wanggu, Torch Road No. 88,Chengyang,Qingdao,China