Specifications: 1 A grade acoustic material 2 ISO9001-2008 3 not produce dust and other debris during operating. 4 One roll per bag vacuum Melt-blown car sound proofing soft padding Introduction: Sound insulation material is a new kind of high-tech product independently developed by ourselves. Its raw materials are polyester and polypropylene fibers. It is white and odorless; not contains any carcinogenic substances, and will not produce dust and other debris during operating. Features: 1 Fiber fineness of material is 0.5-1.0μm. 2 The random distribution of fiber provides more opportunities for thermal bonding, so that melt-blown gas filter material has a greater surface area and higher porosity(≥75%). 3 Such high density can absorb sound waves and prevent sound waves from spreading to other spaces by other medium Compared with other sound insulation materials: ITEMS Felt Sponge glass Polyurethane sponge PP and PET combined padding Features Heavy Foamless Water-absorbing Light weight Water-absorbing Incombustible Environment polluting Waterproof Moldy easily Incombustible / Anti-mildew Performance Fiber dust is harmfui to our health / Flame-retardant / / / Eco-friendly Application: Melt-blown car sound acoustic padding