For low smoke halogen-free cable has excellent flame retardant performance, less smoke when burning, no corrosive gas escape. It is widely used in nuclear power plants, subway stations, telephone exchanges and computer control centers, high-rise buildings, hotels, radio and television stations, important military facilities, oil platforms, places where people gather and air density is low. Below henan east China cable factory xiaobian to introduce some common low-smoke halogen-free flame retardant cable materials.
1. Plastic low-smoke non-halogen fuel
Low smoke halogen-free flame retardant sheath material temperature resistance grade is 70℃ and 90℃, the product oxygen index is generally required to be greater than 32. It has good machining performance. It is widely used in the classification and application of sheath layers for power cables, communication cables, low-smoke halogen free cable materials, control cables, Marine cables and so on.
2. Thermoplastic low-smoke halogen-free flame retardant insulators
Low-smoke halogen-free flame-retardant insulation material has similar properties with low-smoke halogen-free sheath material, so the insulation requirements are higher. It can be used as an insulating layer for power cables, communication cables, electronic lines, etc.
3, thermoplastic low smoke halogen-free flame retardant oxygen barrier
This material is used for the inner sheath of power cable with high flame retardant requirement, which can improve the overall flame retardant effect of cable and reduce the flame retardant requirement of cable insulation sheath.
4, radiation crosslinking low-smoke halogen-free special cable materials
Irradiated crosslinking low-smoke halogen-free special cable material is generally used in special occasions such as locomotive and rolling stock, petroleum exploration and ship, etc. Generally, it is required that the cable has oil resistance and high temperature resistance. Photovoltaic cables for solar power generation need not only high temperature resistance, but also good thermal life. Nuclear power cables are required to have good radiation and thermal aging resistance.
5, soft low-smoke halogen-free flame retardant elastomer
Soft low-smoke halogen-free materials refer to elastic materials whose hardness is between 75 -- 85 (shorea) (hardness of common halogen-free materials is above 95). With the decrease of material hardness, the physical and mechanical properties, thermal deformation resistance and flame retardant properties of the product will be affected to some extent. It is mainly applicable to the occasions with soft requirements, such as flat cables for elevators, square car wires, electronic wires with high soft requirements, etc.
At present, in locomotive cables, oil platform cables, Marine cables, oil seals and other occasions, the material is required to have both high temperature resistance, oil resistance and flame retardant. Oil resistance condition mainly refers to oil resistance and diesel resistance, heat resistance grade generally requires 105 -- 150 degrees Celsius, flame retardant generally requires a combustion.
6. Low-smoke halogen-free flame retardant cable materials for photovoltaic cables
Low smoke halogen-free photovoltaic cable is a branch which develops rapidly in recent years. At present, domestic products mainly meet the two standards of TUV rheinland and UL. The products have the characteristics of heat aging, acid and alkali resistance, water resistance, high temperature resistance and flame retardant.
7. Low-smoke halogen-free flame retardant cable materials for nuclear power cables
Nuclear energy is one of the development directions of new energy. Cables suitable for nuclear power plants shall be insulated and sheathed. The material used for cable is required to have good radiation resistance, especially good thermal aging performance. In addition, nuclear power cables usually require a thermal life of 40 or 60 years, and the cables have good flame retardancy. In terms of performance, all kinds of cables are burned by single vertical combustion or cluster combustion A and B.