Non-woven fabrics can be used for sound insulation, air filtration, heat insulation, strengthen and improve ... /M2—1500G/M2Product DescriptionNon-woven fabrics can be used for sound insulation, air filtration, heat insulation, strengthen and improve ... , after shelf substrate composite non-woven fabrics 4, automotive sound insulation, heat insulation, shock absorption, sealing interstitial materials, ...