Resin composite manhole covers have been used to replace cast iron manhole covers in many provinces and cities such as Jiangsu, Zhejiang, Jiangxi, Anhui, Fujian, Chongqing, Hubei, Hunan, Henan, Gansu, Guangxi, Guangdong, Shandong, Hebei, Shaanxi, Sichuan, Guizhou, Yunnan, Shanxi, Inner Mongolia, Jilin, Liaoning, Heilongjiang, Ningxia, Qinghai, etc. Resin manhole covers have the advantages of light weight, high strength, excellent fatigue resistance, damage safety, simple molding, low rolling noise, good chemical corrosion resistance, good acid and alkali resistance and beautiful appearance. Its comprehensive performance and economic indicators have surpassed cast iron manhole covers, and it can also solve the problem of cast iron manhole covers being stolen. At the same time, it can also reduce resource consumption and has important economic and social value. In accordance with the requirements of the Ministry of Construction's "1998 Ministry of Construction Industrial Product Standardization and Revision Project Plan" (Jianbiao [1998] No. 58), the "Recycled Resin Composite Material Manhole Cover" standard compiled by a company in Heilongjiang Province was reviewed and approved as an industry standard, numbered CJ/T121-2000, and implemented on June 1, 2001.
Features:
1. Strong anti-theft performance: Resin composite manhole covers are made of unsaturated resin, glass fiber and other materials and a steel frame through a special production process. They are formed in one step by high-temperature grinding and pressing. The materials have no recycling value and it is very difficult to remove the steel bars (the cost of removing the steel bars exceeds the value of the steel bars). Therefore, it has the function of active anti-theft.
2. Large bearing capacity: The bottom adopts a special pot-bottom structure, which increases the force-bearing area by dozens of times. The continuous reinforcing fiber used ensures that the fiber and glass fiber cloth are integrated into one, so that the product has sufficient bearing capacity. And it meets or exceeds national standards.
3. Long service life: By using high-performance resin, glass fiber and special production process formula, the penetration of resin in glass fiber is ensured, which greatly enhances the bonding strength of the two, so that the material will not produce internal damage under cyclic load, thus ensuring the service life of the product and the same superiority of other resin composite manhole covers. The disadvantage of poor bonding strength is eliminated.
4. Beautiful, practical and high-grade: According to the needs of high-end customers, we can make personalized designs with complex LOGO and multiple colors on the surface of the same manhole cover, making the pattern delicate, colorful and clear. And we can make various imitation stone surfaces and colors that are the same as various stone pavements according to customer needs.
5. High/low temperature resistance, good insulation performance, strong corrosion resistance: The product is corrosion-resistant, non-toxic and harmless. It has no metal additives and has a real insulation effect. It can be used in complex, harsh and demanding places. The product has been tested by relevant national authoritative testing agencies and has obvious acid and alkali resistance, corrosion resistance, anti-aging and other indicators that meet and exceed national standards.
6. Environmental protection, anti-skid, low noise: the product will not slip, make harsh noise or reverse noise after being run over by a car. At the same time, due to its light weight and precise buckling of the cover and seat, it overcomes the problems of other manhole covers such as "jumping, tilting, making noise and shifting".
Product Features:
The biggest feature of the resin composite manhole cover is that it is made of polymer composite materials and has no recycling value. After the promotion and use of resin manhole covers, the problem of stealing manhole covers and causing urban black holes will be solved. Unlike the manhole covers on the market, it is pressed out by a hydraulic press and has greater impact resistance. "
This resin composite manhole cover is made of glass fiber and resin as basic materials, and curing agent, accelerator and other auxiliary materials. It is two-thirds lighter than a cast iron manhole cover, with a service life of more than 20 years, which is 1 time that of a cast iron manhole cover, and the price is only 80% of that of a cast iron manhole cover. At the same time, this manhole cover is also insulated and noiseless. The Chifeng Product Quality Supervision and Inspection Institute conducted load and impact strength tests on this manhole cover and found that the load force of this manhole cover is 24 tons, and the impact strength also exceeds that of ordinary manhole covers.
