Coloring and color matching process of multi-functional plastic hook

Coloring and color matching process of multi-functional plastic hooks:

Color matching and coloring can be done by directly adding toner to resin and color masterbatch.

After the toner is directly mixed with the plastic hook 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, the coloring strength is poor, 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. Coloring requirements.

The raw material masterbatch of plastic hooks can be classified according to the resin to be colored, such as plastic hooks made of ABS masterbatches, display box hooks, PC masterbatches, slipper hooks made of PP masterbatches, plastic clips, etc.; It can be classified according to the coloring resin processing process, and there are three types of masterbatches: injection molding, film blowing and extrusion. Due to the pretreatment of the pigments, the color masterbatch has higher tinting strength, the dosage can be reduced, the quality is stable, the transportation, storage and use are convenient, and the environmental pollution is greatly reduced.

The dispersant removes the surface air by wetting and infiltrating the pigment, disperses the agglomerates and agglomerates into fine, stable and uniform particles, and no longer agglomerates during processing. The commonly used dispersant is low molecular weight polyethylene wax. For organic pigments and carbon blacks that are difficult to disperse, EVA wax or oxidized polyethylene wax is used, and 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.

The performance indicators of the color masterbatch include color difference, whiteness, yellowness, yellowness, thermal stability, oxygen index, melt flow rate, etc. Of course, the fineness, migration, chemical resistance, and toxicity of the pigment are also related to the color masterbatch. It is related to particle performance, and some indicators are very important in special applications, such as the filter press value (DF value) fineness of fiber-grade masterbatch.