1,SMC insulation sheet introduction  

SMC insulating sheet is molded from unsaturated polyester glass fiber reinforced laminate molded products in various colors.  It’s short for Sheet molding compound. The main raw materials are GF (special yarn), UP (unsaturated resin), low shrinkage additives, MD (filler) and various additives.  It first appeared in Europe in the early 1960s, and was developed in the United States and Japan around 1965.  At the end of 80′s, our country introduced foreign advanced SMC production line and production technology.

2, Characteristics

SMC insulation board has high mechanical strength, flame retardant, leakage resistance is second only to UPM203;  Arc resistance, dielectric strength and high voltage resistance;  Low water absorption, size stability, small warpage and other characteristics.  SMC insulation board products are mainly used in high, medium and low voltage switchgear insulation partition.  SMC composite material performance, unique solution to wood, steel, plastic meter box easy to aging, easy to corrode, poor insulation, cold resistance, poor, the shortcomings of poor flame retardancy, short service life, excellent properties of glass fiber reinforced plastic meter box, has absolute seal waterproof performance, corrosion performance, preventing electricity-stolen performance, no need to ground wire, appearance beautiful, have a lock on security protection and sealing, long service life,  SMC distribution box /SMC meter box /SMC FRP meter box /SMC meter box is widely used in the transformation of rural power network and urban power network.

3.SMC application field

Electrical industry: all kinds of switch cabinet partition board, lining board, insulation support, support, arc cover, arc tube and various types of insulator,

Arc extinguisher, contact holder, bus splint, motor outlet terminal box, electricity meter box, etc.

Automobile industry: automobile bumper, fender, spare tire bin, seat, instrument panel, dazzle board, etc.

Construction industry: all kinds of high-rise building water tank, toilet sanitary ware, decorative board and other products.

Railway industry: signal lamp, carriage window frame, signal box shell, etc.

Iv. Characteristics and advantages of SMC material in molding auto parts industry

1, light weight

For the same parts, the weight of the SMC composite material is 20-30% lighter than steel, which meets the requirements of the automotive field to reduce the weight of the parts while ensuring the strength of the parts. It is an ideal energy-saving product in the automotive industry.In addition, SMC components not only save energy and energy consumption, but also contribute to the improvement of the environment.

2, excellent physical performance

Its physical properties can best compete with metal materials, and can still maintain mechanical properties under high temperature conditions, is general thermoplastic incomparable, is an ideal material for plastic steel.

3, high degree of integration design freedom

SMC material flow characteristics and molding process determines that many parts (such as positioning parts, connectors, stiffeners, flanges and holes, etc.) can achieve one-time molding, can reduce the number of molds, tooling and welding, assembly and other processes, so as to significantly reduce Cost, low cost operation of low volume parts can be realized.

4, corrosion resistance, good bending resistance, high reliability

SMC material itself is corrosion resistant material, so it does not need to be phosphating in order to prevent corrosion and improve bonding performance, compared with metal SMC plate applications can reduce costs and save energy.  For automotive parts used outdoors under harsh external conditions

Speaking of, it is a kind of unique material. Compared with steel plate and aluminum plate, SMC plate has good resistance to the impact of foreign objects and dents and dents rebound ability.

5, excellent heat resistance and coating

SMC products have good heat resistance.  SMC products can maintain dimensional stability from -50 ° C to +200 ° C after release.  SMC material is the most suitable material for steel plate spraying technology, because SMC has a similar thermal expansion to steel

Coefficient and heat resistance, after spraying SMC products can be cured at the same oven temperature as the steel coating.  In addition, SMC has good process adaptability, although SMC board does not need phosphating treatment, but if limited by the original production process, it needs to go through phosphating treatment system, SMC board can also meet the requirements of this aspect, SMC parts can also be processed by electrophoresis spraying (EDPO) system.