復合井蓋中碳纖維作用：碳纖維具有強度高、模量高、耐高溫、導電等一系列性能，首先在航空航天領域得到廣泛應用，近年來在運動器具和體育用品方面也廣泛采用。據預測，土木建筑、交通運輸、汽車、能源等領域將會大規模采用工業級碳纖維。

1997~2000年間，宇航用碳纖維的年增長率估計為31%，而工業用碳纖維的年增長率估計會達到130%。中國的碳纖維總體水平還比較低，相當于國外七十年代中、末期水平，與國外差距達20年左右。

國產碳纖維的主要問題是性能不太穩定且離散系數大、無高性能碳纖維、品種單一、規格不全、連續長度不夠、未經表面處理、價格偏高等。

Role of carbon fiber composite covers: Carbon fiber with high strength, high modulus, high temperature, electrical conductivity and other properties of a series, the first widely used in the aerospace field, in recent years, sports equipment and sporting goods also widely used. According to the forecast, civil construction, transportation, automotive, energy and other areas will be large-scale use of industrial grade carbon fiber.

From 1997 to 2000, with an estimated annual growth rate of aerospace carbon fiber is 31%, while the annual growth rate of industrial use of carbon fiber is estimated to reach 130%. China's overall level of carbon fiber is still relatively low, equivalent to the foreign mid-1970s, the final level, the gap with foreign countries amounted to about 20 years.

The main problem is that the performance of domestic carbon fiber and dispersion coefficient is not stable, non-high-performance carbon fiber, a single species, incomplete specifications, continuous length is not enough, without surface treatment, high prices and so on.