European and American countries attach great importance to the safety testing of silicone products, there are often exports of silicone products failing the test, which is a headache for most enterprises, the following Keshihua Electronics will briefly introduce the three reasons that affect the export of silicone products failing the health and safety test.

First, the quality control of raw materials is not strict. Some factories do not pay attention to the raw materials used for kitchen tableware, without testing the raw materials on the use of silicone raw materials of low quality grade for the production of food tools products, or the use of unqualified color glue and additives for coloring in the production process, resulting in substandard product hygiene.
Production process is not standardized. Due to the special nature of the safety requirements of silicone tableware, food silicone products have very strict requirements for the production process, and the products need enough time to remove volatile substances after molding. Some factories do not achieve sufficient processing time for the products in order to pursue efficiency.

Second, the enterprises do not pass the conditions of use of the products. The EU and other countries require product testing in accordance with their most stringent use foreseeable. Most of the factories only produce according to the customers' samples and have no understanding of the usage and use conditions of the products, and are relatively blind when dealing with the third-party testing, which is even obviously inconsistent with the foreseeable use conditions of the products.

Third, the second vulcanization is also called after vulcanization. The role of secondary vulcanization: when silicone rubber is vulcanized by peroxide, the decomposition of peroxide triggers the reaction of polymers, which generates low molecular compounds (such as benzene and benzoic acid, etc.) in the rubber will affect the mechanical properties of rubber. In addition, silicone rubber in the first stage of heating and molding, its crosslink density is not enough, to make it further vulcanization reaction to increase the density of silicone rubber. The pull-up strength, resilience, hardness, swelling degree, density, thermal stability are all improved than the primary vulcanization. Without secondary vulcanization, the performance of the silicone rubber may be affected and better products may not be produced. The parameters of primary vulcanization may be different from those of secondary vulcanization, which is related to the actual operation! There are various kinds of silicone vulcanization, such as high temperature and room temperature. According to the high temperature silica gel, for example, before vulcanization is what we usually call raw rubber, mixing rubber is a lot of additives such as vulcanizing agent, release agent, and raw rubber together with refining and. From the appearance of a look can be seen. It is not elastic when it is torn by hand. If the rubber is mixed at a certain temperature and vulcanized at a certain temperature, you can get the product, just like the silicone phone cases we usually see, as long as the manufacturer can provide food certification, generally speaking, they are non-toxic.