Causes of Silicone Products Detection Unqualified
Release time:
2024-01-19
The hygiene of silicone products is a problem that Europe and the United States attach great importance to. It has been found many times that the pre-inspection and sampling of exported silicone products are unqualified. Silicone products hygiene indicators are not qualified, we need to start from the following three reasons, and to improve the quality of raw materials to control.
The hygiene of silicone products is a problem that Europe and the United States attach great importance to. It has been found many times that the pre-inspection and sampling of exported silicone products are unqualified. Silicone products hygiene indicators are not qualified, we need to start from the following three reasons, and to improve the quality of raw materials to control.
Some factories do not pay enough attention to the raw materials used for kitchen tableware. Without testing the raw materials, they use silicone raw materials with low quality grade for the production of food tools, or use unqualified color glue and additives for coloring in the production process, resulting in unqualified product hygiene.
The production process is not standardized. Due to the particularity of silicone tableware requirements, food silicone products have very strict requirements on the production process, and it takes enough time to remove volatile substances after the product is formed. In order to pursue efficiency, some factories do not have enough processing time for their products.
Countries such as the European Union require product testing to be carried out in accordance with its predictable and strict use. Most factories only produce according to customer samples, do not understand the purpose and conditions of use of the product, and are blind in dealing with third-party testing, and even obviously inconsistent with the foreseeable conditions of use of the product.
Secondary vulcanization of silicone products, secondary vulcanization is also called post-vulcanization. The role of secondary vulcanization: when silicone rubber is vulcanized with peroxide, the decomposition of peroxide causes the polymer reaction to generate low molecular compounds (such as benzene and benzoic acid) present in the rubber will affect the mechanical properties of the rubber.
Moreover, after the silicone rubber is heated in one stage, its crosslinking density is not enough, and it is necessary to further vulcanization reaction to increase the density of silicone rubber. The tensile strength, resilience, hardness, swelling degree, density and thermal stability are all greatly improved by one vulcanization.
If you do not carry out secondary vulcanization, perhaps the production of silica gel performance by a certain impact, not better performance products. The parameters of primary vulcanization may be different from those of secondary vulcanization, which is related to actual operation! Silicone vulcanization has a variety of high temperature and room temperature. According to high-temperature silica gel, for example, before vulcanization, it is what we usually call raw rubber. Mixing rubber is to refine many additives such as vulcanizing agent, release agent, etc. together with raw rubber.
You can see it from the outside. It breaks when you pull it with your hand and has no elasticity. If at a certain temperature, the mixed glue at a certain temperature, vulcanization molding can get products, like we usually see silicone phone sets, etc., as for the poison is not poisonous as long as the manufacturer can provide food certification, generally speaking, it is non-toxic.
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