How does the color of silicone products come from, how to color silicone products?

The coloring of silicone products can be achieved by a variety of methods, mainly including surface coloring and mixing coloring. Obo silica gel gives you a brief introduction to the process of coloring silicone products:

Surface coloring: Very simple and easy to operate procedure to spray the colorant onto the surface of the silicone product to make it obtain color.

Baby silicone bowl

Mix coloring:

Mixing: Mixing method is commonly used to color silica gel, including dry powder coloring, color paste coloring, particle coloring and master chain coloring several different techniques. In the mixing process, the toner can be added directly or mixed with the carrier first and then added to the rubber compound, and the rubber mill can roll and mix many times to make the rubber compound and the color integrated and uniform. The color of the silica gel raw materials produced by the mixing method is more detailed and uniform, and it is a common way to produce colored silica gel raw materials.

Solution: Dissolve the rubber into a solution of a certain concentration with a good solvent first, then add colorant and other compounding agents, stir evenly, dry at a certain temperature to remove the solvent, and then add sulfur in the rubber mixing machine. However, this method is quite complicated to operate, if the colorant dispersion is not uniform, the product will have color difference, and the solvent is difficult to recover, which will cause environmental pollution, so it is now less used.

Rubber refining

In the process of rubber refining, the silica gel color master is often used as a raw material for coloring various silica gel products, and is suitable for molding process. Silica gel color masterbatch is composed of silicone rubber, color powder, silicone oil, dispersant and other components, divided into organic color masterbatch, inorganic color masterbatch and other types. In practice, in order to get the ideal color, it may be necessary to prepare different color masterbatches, and to obtain the target color by adjusting the specific proportion.