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Introduction of the process of plastic color matching
Source: | Author:hk8756c8 | Published time: 2019-04-23 | 4052 Views | Share:
Plastic color matching method, generally can be directly added to the resin method and masterbatch color matching method using two kinds of toner pigments:

First, the advantages and disadvantages of the color pigment color matching method

After the toner is directly mixed with the plastic resin, it is sent to the next product forming process, which has the advantages of short process and low cost, but the working environment is poor, the coloring power is poor, the coloring uniformity and the quality stability are poor.

Second, the advantages and disadvantages of masterbatch color matching method

The masterbatch color matching method is a coloring agent and a carrier resin, a dispersing agent, other auxiliary agents, etc., and is prepared into a pellet of a certain concentration of coloring agent. When the product is formed, a certain amount of masterbatch is added according to the coloring requirement, so that the product contains the required content. The coloring dose is required to achieve the coloring requirements.

The masterbatch can be classified according to the type of resin to be colored, such as PBT masterbatch, ABS masterbatch, PC masterbatch, PP masterbatch, TPU masterbatch, etc., or can be classified according to the coloring resin addition process, and there is injection molding. , blown film, extrusion grade three types of masterbatch. The masterbatch has a higher tinting strength due to the pretreatment of the pigment, the dosage can be reduced and the quality is stable, and the transportation, storage, use and convenience are greatly reduced.

The plastic color dispersant removes the surface air by wetting and penetrating the pigment, disperses the agglomerates and agglomerates into fine, stable and uniform particles, and no longer aggregates during processing. The commonly used dispersant is a low molecular weight poly Ethylene wax, EVA wax or oxidized polyethylene wax is used for the organic pigment and carbon black which are difficult to disperse. The synthesis of low molecular weight polyethylene wax and polyethylene low molecular weight polyethylene wax are very different.

Other additives include coupling agents, antioxidants, light stabilizers, antistatic agents, fillers, etc., depending on the requirements and variety, called multi-functional masterbatch, and if added brightener, it is beneficial to molded products. Demolding and improving the brightness of the surface of the product.

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

In general, due to the development requirements of environmental protection and quality, the current plastic color matching manufacturers have chosen more and more masterbatch color matching methods, which will bring more market space for masterbatch color matching companies.

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