HuanZhong explains what are the hazards of poor quality rubber expansion joints.

The harm of poor quality rubber expansion joints: the treatment of waste rubber products is one of the serious problems facing people today. In order to meet the ever-improving material performance requirements, rubber towards the direction of high strength, wear resistance, stability and aging resistance, but at the same time caused a long period of abandoned rubber can not be naturally degraded, a large number of waste rubber has caused more difficult to deal with than plastic pollution black pollution. On the other hand, it wastes the valuable rubber resources.
Now more recently found above the market certain manufacturers use waste recycled rubber (update rubber) manufacturing bendable rubber expansion joint products, (Note: update rubber refers to waste vulcanized rubber after crushing, heating, mechanical treatment and other physical and chemical processes, so that it from the elastic state into a plastic and viscous, able to re-vulcanization of rubber) the essence of the renewal process is in the heat, oxygen, mechanical action and the chemical and physical action of the renewal agent Under the combined action of heat, oxygen, mechanical action and the chemical and physical action of the renewing agent, the vulcanized rubber network is destroyed and degraded, and the location of the breakage is both in the cross-linked bonds and in the macromolecules between the cross-linked bonds. This behavior is greater damage to the industry image of this industry, bringing greater harm to users, not only product performance does not meet the design standards of rubber expansion joint performance, and in the pipeline operation will appear in the phenomenon of secondary pollution. This bendable rubber expansion joint although the price is cheap but the harm to society is greater internal contains a high concentration of lead and zinc and other waste materials, the human body is great.