Composite manhole cover is a fiber-reinforced thermosetting composite material using unsaturated polyester resin as a matrix, also known as block molding compound (DMC), which is made by press molding technology. Its characteristics are as follows:
1. Weather resistance and aging resistance. It can resist the erosion of acid, alkali, salt and other harmful substances, and its service life is generally more than 15 years.
2. Good flame retardant properties. After measurement, its oxygen index can reach 80 ~ 120, which meets the non-combustible and flame-resistant levels specified by the national standard GB8624.
2. Good flame retardant properties. After measurement, its oxygen index can reach 80 ~ 120, which meets the non-combustible and flame-resistant levels specified by the national standard GB8624.
High strength: The composite manhole cover product has high compressive, bending and impact strength, and has toughness. After long-term use, the product will not be crushed and damaged, which can cause "urban black hole" accidents.
Beautiful appearance: the surface pattern is exquisitely designed, and the colors are adjustable, which can beautify the urban environment.
Easy to use and light weight: The product weighs only about one-third of cast iron, which is easy to transport, install and repair, which greatly reduces labor intensity.
No recycling value, natural anti-theft; according to customer needs, a locking structure is provided to prevent theft of property in the well.
Strong weather resistance: The manhole cover can be used normally in the environment of -50 ℃ ～ + 300 ℃ through scientific formula, advanced technology and perfect technical equipment.
Resistant to vehicle rolling and long service life.