Tarpaulin manufacturers talk about the process of tarpaulin dyeing

When the tarpaulin is dyed, there are mainly two commonly used processes, namely, the method of adding toner directly to the resin and the method of color masterbatch. After the toner is directly mixed with the plastic resin, it is sent to the next step of the product forming process. The process is short and the cost is low, but the working environment is poor, the coloring strength is poor, and the coloring uniformity and quality stability are poor. The color masterbatch method is that colorant, carrier resin, dispersant, and other additives are formulated into pellets with a certain concentration of colorant. When the product is formed, according to the coloring requirements, a certain amount of color masterbatch is added to make the product contain the required colorant dose. Meet the coloring requirements. Generally speaking, the performance indicators of color masterbatch include color difference, whiteness, yellowness, yellowness, thermal stability, oxygen index, melt flow rate, etc. Of course, the fineness, migration, chemical resistance, toxicity of pigments It is also related to the performance of the color masterbatch, and some indicators are very important in special applications, such as the filter pressure value (DF value) fineness of the fiber-grade masterbatch. However, it should be noted that the dispersant removes the surface air by wetting and infiltrating the pigment, disperses the agglomerates and agglomerates into fine, stable and uniform particles, and does not agglomerate during processing. The commonly used dispersants are For low molecular weight polyethylene wax, EVA wax or oxidized polyethylene wax is used for organic pigments and carbon black that are difficult to disperse. There is a big difference between synthetic low molecular weight polyethylene wax and low molecular weight polyethylene wax prepared by polyethylene cracking method. Other additives include coupling agents, antioxidants, light stabilizers, antistatic agents, fillers, etc. The amount added depends on the requirements and varieties, which are called multifunctional masterbatches. For example, adding brighteners is beneficial to molded products. Demoulding and improving product surface brightness.

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