Rubber as the commonly used materials in the above facilities and equipment, ordinary rubber in the fire will generally be completely burned, in order to flame retardant self-extinguishing, the current technology mainly uses halogen-free low-smoke flame retardant rubber, mainly silicone rubber, ethylene-propylene rubber and ethylene - vinyl acetate rubber (EVM), these rubber in the fire combustion with flame retardant and self-extinguishing, in the fire has a certain role. However, after continuous high temperature combustion, the burnt residue has no mechanical strength, becomes ash, and cannot maintain the integrity of the product, which will cause more dangerous secondary disasters, such as the cable, battery sheath and insulation after burning, resulting in short circuit.
  As a new type of fireproof material, ceramicized flame retardant silicone rubber has the same properties as ordinary rubber materials at room temperature, and can form a dense and hard ceramic layer at high temperature, which can hinder the further spread of the flame and play a better protective role in the fire.
  Ceramicized flame retardant silicone rubber is a kind of material made by mixing the resin as the matrix, adding the appropriate proportion of high + low melting point porcelain powder and other additives. This material has the characteristics of plasticity + softness of commonly used polymer composite materials at room temperature, and can be quickly ceramicized to form ceramic ceramics with certain strength and self-supporting ability at high temperature. Fire safety is a new solution.

  Ceramic flame retardant silicone rubber | characteristics
1, form a self-supporting ceramic body in the flame
  When the specially designed ceramicized flame retardant rubber is exposed to the flame, depending on the rubber variety and formula adjustment, ceramicization can be produced in different temperature ranges above 500 degrees, and porous self-supporting ceramic body can be fired, as shown in the figure, the structural integrity can be maintained for a certain time in the flame at 1000 ° C high temperature, and the effect of "passive fire prevention" can be well played. Gain valuable time for fire safety.
2, has a certain strength, good thermal shock resistance
  The ceramic sintered body is relatively hard, and the ceramic sound is knocked, and the bending strength and penetration strength are certain. The bending strength of ceramic flame retardant silicone rubber specimen is much greater than that of ordinary silicone rubber, and its strength usually increases significantly with the increase of temperature. By spraying water on high temperature ablative specimens during simulated fire fighting process, the sintered body of ceramized flame retardant silicone rubber did not burst and showed good thermal shock resistance.
3, no halogen, low smoke, low toxicity, self-extinguishing, environmental protection
  Ceramic flame retardant silicone rubber can achieve flame retardant self-extinguishing effect without adding halogen flame retardants, flame retardant UL94V-0. Under the ablation of the flame, the smoke is completely broken after a short time (within a few minutes), and in the following ablation process, there is no smoke itself. The combustion of ceramic flame retardant silicone rubber produces carbon dioxide, water and silicon dioxide, which are non-toxic substances.
4, easy to process
  Ceramic flame retardant silicone rubber rubber production equipment is the same as ordinary silicone rubber, rubber material has good extrusion performance and molding performance, can be directly used silicone rubber equipment extrusion, vulcanization into related products, no need to increase equipment, can greatly reduce production costs.
Taking wire and cable as an example, previously, most of the magnesia insulated fireproof cables and mica tape wrapped fireproof cables were used at home and abroad. The production of magnesia insulated fireproof cable needs to import expensive special equipment, and the investment is large; The outer protective layer is seamless copper pipe, and the cost is high; Moreover, there are special requirements in the process of production, processing, transportation, line laying, installation and use, which is difficult to be widely used on a large scale.

Ceramic flame retardant silicone rubber | mechanism
  When silicone rubber is burned at high temperatures, it cracks and decomposes to form silicon dioxide. Because the silica has no bonding ability, after adding the appropriate silicate refractory filler in powder form, the silica generated by the decomposition of silicone rubber reacts with the refractory filler, forming a "low eutectic mixture" at the edge of the filler. The eutectic material acts as a bridge between the silica particles and the filler particles, thus curing them at the ignition temperature and forming a condensed ceramide when cooled. The ceramic body is self-supporting and can withstand certain mechanical shock and vibration.

Application prospect of ceramic flame retardant silicone rubber
  At present, most of the product directions are cable and new energy batteries. At the same time, it also has great application value in building fire protection and daily rubber and plastic application scenarios with fire protection requirements (such as rubber and plastic parts in vehicles)