With special composite perforated design,compared with traditional materials, Aisites organic rubber sponge  can absorb sound more excellently by its thinner thickness. Vinyl soundproof material contains natural minerals and does not contain lead,unrefined aromatic oil, or asphalt. It has a significant effect on reducing the penetration of airborne noise and can significantly improve the insertion loss(sound insulation) from pipeline insulation systems against pipeline noise. Compared with similar products, it has better noise reduction effect especially in low and intermediate frequencies. Specially developed for the rail transportation and passenger bus industries, the thermal insulation materials are made of NBR, a type of closed-cell foam made from synthetic rubber polymers. The insulation performance is stable and reliable, providing a dual guarantee of comfort and energy conservation for rail and passenger buses.