What material is the pressure cooker made of

The pressure cooker looks very ordinary, but it is actually very common in the market. Pressure cookers have existed since the last century. The materials used to make pressure cookers are mainly rubber sealing rings and some common materials for pots and pans. The main advantage is that it is heat-resistant and can prevent aging, and it is also non-toxic.

At present, the materials of domestic pressure cooker rubber sealing rings are mainly silicone rubber and nitrile rubber. Silicone rubber is more ideal than nitrile rubber. Silicone rubber is a material that has excellent properties in flexibility, heat resistance, and aging resistance. Silicone rubber has no chronic toxic effects and is safe for the human body.

In order to reduce production costs, some unscrupulous manufacturers add some non-food additives. These substances are toxic to a certain extent. When food is cooked in a pressure cooker, toxic substances may even melt out, causing food contamination and adverse effects on the human body. Some manufacturers use so-called imitation silicone or other materials instead of silicone to produce sealing rings. This type of rubber ring has poor explosion-proof performance. When the pressure in the pot continues to rise but cannot be released in time, the hot food may spray out of the pot at best, or the pot and the lid may suddenly separate or even explode.

At present, the materials of domestic pressure cooker rubber sealing rings are mainly silicone rubber and nitrile rubber. Silicone rubber has excellent properties in flexibility, heat resistance, aging resistance, etc., and has no chronic toxic effects and is safe for the human body. However, since silicone rubber can be dissolved by n-hexane in the raw rubber state, it will not be dissolved by solvents until a vulcanizing cross-linking agent is added and vulcanized. Therefore, the quality of the vulcanizing cross-linking agent has a great influence on the solvent resistance of silicone rubber. The four unqualified products in this spot check were mainly the pressure cooker rubber sealing rings whose evaporation residue exceeded the standard for n-hexane soaking liquid, and the n-hexane extract exceeded the standard, which would endanger human health.