Popularization of professional knowledge and explanation of coloring methods of silica gel products

With the popularization of professional knowledge and the normal explanation of the coloring methods of silica gel products, the raw materials of solid silica gel are milky white or transparent white, and the silica gel products visible in the market after molding have different colors. So, how does the manufacturer or the customized processing plant accurately color according to the customer's requirements? Different from other industry products, silica gel products have their own unique industry coloring methods. These professional coloring methods have become industry knowledge. According to the different treatment methods, the colouring methods of silica gel products are mainly divided into finished product surface colouring and rubber mixing colouring. The following are briefly explained.

The method of product surface coloring is better for static silica gel products. When it is used for dynamic products, the colorant used is easy to peel off, and the phenomenon of discoloration often occurs. The main step is to spray the colorant on the surface of the finished product and finish the coloring by baking and other procedures.

The method of mixture coloring mainly includes solution coloring and mixing coloring. Among them, the mixing coloring method also includes the coloring of Color Masterbatch, color paste, dry powder and granular materials. First, the solution coloring method is to form a certain concentration of solution through the dissolution of rubber and specific solvent, then add the colorant and silica gel mixture into the solution, mix and mix them evenly, dry them under the appropriate temperature conditions to remove the solvent, and finally in the refining process Add sulfur to the glue machine. The operation of this method is complex and difficult. If the colorant and the mixture are not evenly dispersed, there will be color difference, solvent recovery, environmental pollution and other phenomena. Therefore, the use of this method in the industry is decreasing day by day. 2、 Mixing coloring is the most common and practical method in silica gel products industry, that is, the colorant is added directly or mixed with carrier first and then added to raw materials, and then mixed evenly through the rubber mixer to make the rubber material colored.