In life, we can see silicone products of various colors. You may be wondering. How is silica gel colored? The coloring of silicone products is based on whether the product is dynamic or static. The silicone coloring methods mainly include surface coloring and coloring of the mixture.
Surface coloring is the application of a colorant to the surface of a silicone article to color the silicone article. The method has a certain effect on static products, and for dynamic products, the colorant is easily peeled off and easily fades.
Mixing coloring is currently the main method of coloring silica gel, two methods: solution method and mixing method. Among them, the mixing method has several methods such as dry powder coloring, color paste coloring, pellet coloring and masterbatch coloring.
1. Solution coloring
The method is to dissolve the rubber into a certain concentration solution by using a good solvent, and then adding the coloring agent and the rubber compounding agent other than sulfur to the solution, stirring and mixing uniformly, drying and removing the solvent at a certain temperature, and finally on the rubber mixing machine. Add people sulfur. The coloring method is complicated in operation, the coloring agent and the compounding agent are unevenly dispersed, the color difference is poor, the solvent is difficult to be recycled, and the environment is polluted, which has been less used at present.
2. Mixing method coloring
This method is currently the most commonly used method for coloring silicone products. The coloring agent is directly added or mixed with the carrier and then added to the rubber compound, and uniformly mixed by the rubber mixing machine to color the rubber.
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