Polypropylene-based nonwoven sound-absorbing material coated with multi-walled carbon nanotube-polyurethane composite emulsion for automotive interior

The present invention relates to a non-woven sound-absorbing material, in particular to a A kind of multi-walled carbon nanotube-polyurethane composite emulsion coated polypropylene-based non-woven sound-absorbing material for automotive interior decoration, the material is made of the following raw materials in parts by weight: polyvinyl chloride 12-15, 325-400 mesh hydroxyapatite 15-20, polymethyl methacrylate 6-8, silane coupling agent 2-3, polypropylene 20-25, antioxidant 1076 0.1-0.2, antioxidant DLTP 0.1-0.2, di-n-octyltin dilaurate 0.2-0.3, multi-walled carbon nanotubes 0.8-1, zinc-aluminum alloy powder 0.2-0.3, water-based polyurethane emulsion 10-14 with a solid content of 8-10%, additives 1-2; modified polypropylene prepared by the present invention The base non-woven material inherits the advantages of traditional polypropylene non-woven materials, with improved mechanical properties, not easy to tear, improved thermal stability, improved surface strength of fiber mesh, faster heat dissipation and heat conduction, more conducive to sound wave absorption and attenuation, and obvious noise reduction effect , and is light and tough, durable, and does not pollute the environment inside the car. It is a new and practical sound-absorbing material for cars.