SMC manhole cover is also called sheet molding plastic manhole cover. It is a kind of high strength compound product which is made of unsaturated polyester resin, thickener, initiator, cross-linking agent, low shrinkage additive, filler, internal release agent, colorant and other mixtures impregnated with chopped glass fiber roving by special process, and then formed by high temperature and high pressure liquid pressure.
SMC material is a kind of resin based material, which has excellent electrical performance, corrosion resistance, light weight and high strength mechanical properties. Our country introduced the advanced SMC material production line and production technology from abroad in 1980s. After continuous development and technical improvement in China, it has been applied in many fields in China. Based on the existing SMC sheet technology, our company has improved the glass fiber content of SMC material and further improved the performance of SMC material. The SMC manhole cover made of SMC material produced by our company has more excellent characteristics.
High strength bearing, light weight, convenient maintenance. The density of the product is only 1 / 4 of that of steel, but the strength can exceed the strength of steel after special processing. It is widely used in urban and rural roads, airports, gas stations, telecommunications, communications, water, gas and other important traffic roads.
1. Security. There is no metal interlayer in the material, so it can be safely used in remote places without monitoring facilities.
2. Prevent noise pollution. Compared with metal manhole cover, the vehicle passing by will produce a lot of noise, especially when the cover seat is loose, it will cause harsh noise. The SMC material can reduce the noise caused by vehicle passing.
3 super corrosion resistance, wear resistance, antistatic. The service life can reach more than 50 years. It can be used normally from - 40 ℃ to 100 ℃, and its service life is more than 5-10 years longer than that of nodular cast iron manhole cover, and more than 30 years longer than steel fiber manhole cover and BMC manhole cover.
4. Non hollow structure makes it suitable for various complex traffic sections and construction sections. For rural domestic sewage road excavation, leveling, renovation and other construction technology is complex, the road surface situation is complex, need excavator, roller frequent access, it is difficult to install manhole cover according to the standard process.
For the ordinary manhole cover, it is very easy to damage and hole in this case, which will bring a lot of maintenance cost to the follow-up project operation and maintenance. The SMC manhole cover can not be damaged in various complex situations because of its excellent performance of pressure resistance and wear resistance.