Transformer noise has been a common issue in the industry, which has a great effect on people's everyday life and work. SHIRE GROUP HENRUI polymer material research team successfully developed a new cork rubber material for transformer by advanced material selection and formula design. This new type composite material is made of pure granular cork, oil-resistant rubber and some chemical auxiliaries. It shows great performance of both cork and rubber, which is compressible and elastic. There is only small deformation around when the product is compressed. And it has comparatively high hardness with good compression resistance, oil resistance, abrasion resistance and waterproof, which can effectively reduce the noised caused by transformer vibration.