Rubber air bag, also known as concrete prefabricated hollow plate rubber inflatable core mold, bridge inflatable core film, rubber inner mold, is a kind of internal mold of different shapes that can expand and contract by vulcanizing rubber polymer characteristics and high strength fiber cloth. It is mainly used in the casting and forming engineering of the concrete beam of highway bridge. It is also used in culvert drainage projects. After the rubber air bag is filled with compressed air, the air bag stretches and expands to meet the design requirements of its cross-section, and the inflation pressure is determined according to the manufacturer's logo. It is easy to use, economic and durable, can be used repeatedly for nearly a hundred times, soft contraction when not inflated, arbitrary folding, curling, inflation after expansion has enough strength to withstand the pressure of concrete. It can replace the original wooden mold, bamboo mold and steel mold, and can be reused many times. It is a kind of concrete products supporting products to reduce costs and speed up construction progress.

Rubber fender, also known as rubber fender, is an energy buffer device used in port terminals or ships to slow the impact or shock of ships and docks or ships and ships when berthing or mooring, so that ships and docks are free from damage.

China is one of the fastest developing countries in the world rubber industry, while the rapid economic growth of the rubber industry, its industrial structure and product structure have been further optimized.
During the "Eleventh Five-Year Plan" period, the annual growth rate of the industrial output value of the domestic rubber industry reached 36%, and the annual consumption growth rate reached 12.25%. Among them, the average annual growth rate of radial tires reached 28.5%, and the annual growth rate of tire exports was as high as 34.94%.

Solid rubber fender has high energy absorption and reaction, and has the advantages of low cost, long service life, simple installation and maintenance, etc. It is the most installed protective device in docks and shipyards.

With the development of China's shipping industry, there is more and more demand for dock and Marine fender, and the demand for fender performance is also higher and higher. Among them, rubber fender is the most widely used because of its good toughness and impact resistance. At present, many rubber fender manufacturers in China, the products are uneven, some manufacturers in order to survive in the fierce market competition, one-sided low-cost competition as the main means, do not strictly abide by the relevant standards and processes, the use of low-quality raw materials or excessive use of recycled rubber to reduce costs, which brings great hidden dangers to the safety of docks and ships. Relevant experts said that rubber fender manufacturers should strictly implement the relevant national standards, strict technological processes, enhance independent innovation capabilities, and constantly improve product quality to provide reliable and safe products for China's shipping industry and shipbuilding industry.