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The Three Major Properties of Silicone Rubber Mixing Raw Materials and the Classification of Raw Materials

Ⅰ. Three major properties of silicone rubber mixing raw materials


In fact, ordinary silicone rubber mixing raw materials are produced from methyl vinyl silicone rubber, precipitated silica and other auxiliary materials. The ordinary silicone rubber mixing raw materials contain precipitation substances, and their color is translucent or milky white.


1. High temperature resistance


The most notable characteristics of silicone rubber mixing are high temperature resistance and strong stability. Silicone rubber mixing can be used for a long time in an environment of 250-300 °C.


Choose suitable silicone rubber fillers and high-temperature additives for silicone rubber, the operating temperature can reach 375 °C, and it can withstand thousands of degrees of high temperature instantly. It is estimated that the life of silicone rubber can reach 20 years at 120 ℃ and 5 years at 150 ℃, and it is not easy to age.


②Low temperature elasticity


The processing of silicone rubber products has inherent elasticity at low temperatures. Silicone rubber products or other synthetic rubbers have a low processing embrittlement point, and silicone can work normally at a low temperature of -60 °C.


③Breathability


Silicone rubber has good breathability. The normal temperature permeability of air, nitrogen, oxygen, carbon dioxide and other gases is 30-50 times that of natural rubber.


Ⅱ. How many kinds of silicone rubber mixing raw materials are there?


Silicone rubber mixing raw materials are mainly used in silicone products, which have excellent characteristics such as safety and environmental protection, non-toxic and tasteless, high and low temperature resistance, and stable chemical properties. Therefore, silicone rubber mixing can be widely used in production and manufacturing in all walks of life.


For example, products such as silicone tubes, silicone mobile phone cases, baby pacifiers, sealing rings, etc. that are often used in our daily life are all made of silicone rubber mixing raw materials. So do you know how many kinds of silicone rubber are mixed?


If the raw materials for silicone rubber mixing are classified according to their types and uses, they are mainly divided into food-grade silica gel, high-temperature resistant silica gel, flame-retardant silica gel, insulating silica gel, conductive silica gel, anti-static silica gel, etc.;


If the raw materials for silicone rubber mixing are distinguished by quality, they are mainly divided into precipitation silica gel, gas-phase silica gel, semi-gas-phase silica gel, high-transparency silica gel, high-tear-resistant silica gel, high-resilience silica gel, etc.;


If the raw materials for silicone rubber mixing are distinguished according to the hardness, they are mainly divided into low-hardness silica gel (20-30 degrees), medium-hardness silica gel (40-60 degrees), and high-hardness silica gel (70-90 degrees);


If the raw materials for silicone rubber mixing are distinguished according to the production process, they are mainly divided into molded silica gel, extruded silica gel, calendered silica gel, injected silica gel, etc. Other molding/extruded silica gel production processes are the most common;


According to the use environment, the raw materials for silicone rubber mixing are mainly divided into food-grade silica gel and industrial-grade silica gel. Food-grade silica gel can be applied to silica gel products that are in close contact with human body or animals, and industrial-grade silica gel can be applied to various industrial miscellaneous products.

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