Transparent silica gel products since they are transparent how can they be yellow, yellow can also be transparent, what is the reason?Is it oxidation?Normal transparent silica gel products are put for several years and will not turn yellow, but sometimes we are in production, some transparent silica gel products are yellow when they are just baked. What is the reason why transparent silica gel products turn yellow? ZINCA explains why:

  One. Curing agent

  1 vulcanizing agent properties are divided into common type and yellow resistance. Its application scope has the following two aspects:

  2 ordinary type not yellow vulcanizing agent, applied to some can be used for dark color or color requirements are not high non-exposed silica gel products.

  3. Anti-yellow vulcanizing agent is applied to products that need to be exposed, lighter and brighter in color, and have higher requirements for color.

  Ii. Technology

  Transparent silica gel products in molding, leading to transparent silica gel products in the color of yellow after forming the main problems are:

  1. The mold temperature is too high

  2. Vulcanization time is too long

  3. After adding sulfur twice

  Three. The quality of the raw material itself is not good

  Sometimes we add anti-yellow vulcanizing agent in the rubber, but the transparent silica gel product still looks yellow after molding, it may be that the yellow resistance of the raw material is too poor, the raw material advice for the poor yellow resistance of the raw material is direct refuelling.

  Conclusion: Although silica gel products have weather resistance and aging resistance.But sometimes there are just baked silicone products yellow.In order to avoid this situation, according to the requirements of the choice of curing agent, process to strictly control the mold temperature and curing time of the product, the raw material should pay attention to the yellow resistance of raw materials.

  Transparent silica gel products have the above reasons for yellow, of course, there are other unknown reasons for specific analysis, because the use of different quality of silica gel raw materials produced by the mold silica gel products will be different.Want to buy high-quality transparent liquid silicone raw materials, welcome to consult our ZINCA, we are a professional engaged in silicone, silicone rubber production, research and development, sales as one of the science and technology group.