Our GRP products are made of:

 i)  unsaturated polyester resin(UP) (Iso type resin, vinyl ester resin) glass fiber (E-glass 2400   Tex)) 

ii)   quartz 

iii)  corundum

 iv)  antioxidant 

v)   firming agent  

vi)   promoter  

vii)  UV additive 

viii)  ethylene-propylene-diene-monomer 

ix)    Cr13 

x)   other auxiliary materials

 

 

Advantage of our composite manhole cover:

1. No recycle value: Its popularity will contribute the manhole cover-stolen problem thoroughly.

2. High load capacity: Its high load capacity exceeds the ductile iron manhole cover.

3. Free design: It can be designed individually in terms of users' demands.

4. Good decorative effect: It can be designed in various colors and patterns with artistic effect of relief.

5. Long service life: There is no any crack in the experiment of 2, 000, 000 fatigue shocks.

6. Well sealed: It can be used to hermetically, and effectively prevent those poisonous gases leaking out from cesspool.

7. No any jangle: There is neither jangle nor rebound when cars pass by.

8. Good wear and corrosion resistance: It has good wear and corrosion resistance and it will be never rusted.