Lightweighting is a big issue in the auto industry. Not only does using lighter materials lead to greater fuel-efficiency and reduced emissions, it also helps to improve vehicle performance. There’s just one problem: many of the lighter weight materials such as aluminum and magnesium are also prone to increasing noise, vibration and hardness (NVH). Their lightweight nature, as well as the need to use thinner components, increases their sensitivity to vibration and the noise that results from that vibration. Although consumers are in favor of fuel-efficiency, drivers and passengers don’t want to be exposed to greater wind and road noise.
In the past, manufacturers solved the problem with manually applied bitumen mats and anti-flutter mastics, but Henkel is among the companies in the adhesive and sealant space that have invented new solutions that can be used in automated production lines.
New Solutions for the NVH Problem
By applying the latest technologies, improved acoustics and sound damping can be achieved. Structural Reinforcements and new bonding techniques help to enhance component rigidity and durability while contributing to the reduction in NVH and lightweighting targets. Examples of these solutions include:
TEROSON® Liquid Applied Sound Deadener (LASD): A spray consisting of polymers, renewable raw materials and additional chemicals is sprayed onto vehicle body parts during assembly. Unlike the installation of bitumen mats, this process can be performed by assembly line robots.
TEROSON® High Damping Foam: Anti-flutter mastics can be replaced byTEROSON® High Damping Foam. The foam is used to dampen flutter in roof and door panels and provides a lightweight alternative for car makers.
Both these products were exhaustively tested in Henkel’s acoustics lab in Michigan, but Henkel says that auto manufacturers needs are constantly changing, and it will be ready to develop new NVH damping solutions based on its clients’ requirements.