Dow Automotive has developed a new dashmat construction that enables engineers to block transfer of noise through the firewall while absorbing interior noise behind the instrument panel. Known as ABA construction (absorber-barrier-absorber), the new dashmats are now commercially available.

"Until now, a tightly sealed barrier was the best way to block engine noise," said Dan Pezolt, Dow Automotive Business Development Manager. "This new technology combines the benefits of barriers with the sound absorption characteristics of polyurethane foam. "The ABA construction also enables us to reduce the weight and cost of the barrier-only systems while maintaining the ability to seal the passenger cabin and consolidate parts."

The injection-molded dash insulator helps prevent engine and drivetrain noise from entering the passenger compartment. Molded-in options such as footrests, electrical wiring channels, fasteners, cowl sides, cowl tops, and sealing features, reduce system cost by eliminating the need for separate components. The polyurethane foam absorbers offer additional acoustical benefits and can be tuned via material selection. The two substrates can be adhesively bonded or affixed using mechanical fasteners.

Dow Automotive provides NVH solutions for body-in-white, interior and powertrain applications and is also a leading supplier of plastics, adhesives, sealants and other plastics-enhanced solutions for interior, exterior, under-the-hood, vehicle body structure and acoustical management applications. The organization serves global tier, OEM and aftermarket customers. With offices and application development centers around the world, Dow Automotive provides materials science expertise and comprehensive technical capabilities to its customers worldwide. For additional information about Dow Automotive products and services, visit www.dowautomotive.com.