Hydraulic oil, metal spring and rubber are three commonly used cushioning and damping media or materials. The cushioning and damping products made from them are called buffers or shock absorbers.

The hydraulic buffer uses hydraulic oil as the buffer medium and absorbs energy by using the flow friction heat generated by hydraulic oil under the action of external force. However, there have always been problems of hydraulic oil sealing that are difficult to solve, easy to leak, narrow range of operating temperature, and difficult to be widely used; Metal spring buffer uses the rigidity and elasticity of spring to absorb energy through spring friction, but its dead weight is large, the spring wears fast, and its service life is short; Rubber has a long history of use as a cushioning and damping material. Generally, the rubber with vulcanizing agent, filling agent and other additives is put into the mold and heated and vulcanized into various shapes. The elasticity of vulcanized rubber is used to achieve the purpose of cushioning and vibration reduction. The volume of vulcanized rubber is incompressible; The service life of vulcanized rubber is also limited due to fatigue damage, permanent deformation, aging and other reasons. Generally, the maintenance period of the above three buffer products is one to two years.

The elastic mastic made by using the viscoelasticity, fluidity and volume compressibility of unvulcanized rubber is a new type of special rubber viscoelastic high damping material. The elastic mastic buffer made by it overcomes the shortcomings of hydraulic buffer, rigid spring buffer and vulcanized rubber buffer, and combines their advantages, with special damping performance and ideal service life. The maintenance period of elastic rubber buffer can be as long as 10 years, and the service temperature range is (- 100 ℃ - 250 ℃), which has become an important development type of buffer.