1. Composite manhole covers are made from unsaturated polyester epoxy resin, enhancing the thermal stability of conventional chemical fibers into a thermosetting high molecular material, also known as Sheet Molding Compound (SMC). Molding technology is employed to shape them, creating a new type of energy-saving power board cover.

2. The composite manhole covers are made using ultra-high pressure and high-temperature single-mold forming technology, featuring high polymerization and density, excellent impact and tensile strength, as well as advantages such as wear resistance, corrosion resistance, non-rusting, and maintenance-free.

3. Composite Manhole Cover Features:

Composite resin manhole covers incorporate reinforced mesh internally, with special reinforcement at critical stress points. In the event of unavoidable external force impacts, they can quickly dissipate working pressure to ensure the safety of people and vehicles.

② Without metal, the steel frame of stone-plastic manhole covers and concrete manhole covers is less than 1/10 of the total weight of the covers. They have little value for theft. Moreover, due to the high strength of the covers, it is extremely difficult to remove the small amount of steel inside. Therefore, thieves don't steal them.

③ The inorganic magnesium silicate composite manhole covers are highly durable, affordably priced, and aesthetically pleasing. The product can be colored to preference, and is easy to install, maintain, and identify. Due to its lack of recyclability, it addresses the issue of theft. China plans to gradually replace these covers with high polymer materials over the next three to five years, presenting a significant market potential.

④ Non-ferrous synthetic composite resin manhole cover. This manhole cover is made from new high-strength inorganic synthetic materials and glass fiber composite, categorized as a medium-grade manhole cover product.