In the automobile manufacturing industry, the application of damping materials and its extensive. The function of the damping material is to connect the outer plate and the inner reinforcing plate of the vehicle, which not only ensures the supporting function of the reinforcing plate, but also separates the inner and outer plates, prevents the inner and outer plates from resonance and collision, and plays the role of damping, damping and absorption noise reduction, so it is also called damping material.

There are many kinds of damping materials, including damping expansion adhesive and damping expansion film. Pcmape developed self-adhesive damping expansion film is a kind of elastic sheet, which has the characteristics of convenient construction and adhesive strength without adhesive. The main functions of damping expansion film are vibration reduction, sound absorption, damping and noise reduction. 

The shear strength increases with the increase of the amount of tackifier. This is due to the addition of tackifier system, which provides good adhesion for products, and the increase of adhesion increases with the increase of the addition of tackifier system. At the same time, the tackifier system can play the role of softener and plasticizer in the products, so the amount of tackifier system can be used to control the adhesion strength (i.e. shear strength), hardness, compressibility and low temperature of the products according to the need.