Composite manhole covers

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

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.

Our products have obtained various kinds of certificates, including:

1. Patent certificates for new applied products Patent Number: ZL01257174.1 & ZL 02277033X issued by China National Knowledge Property Right Bureau

2. Gold Medal at 2003's Hong Kong International.