The constrained layer damping (CLD) heat shield product from the automotive products group of Lydall Inc., Manchester, Mass., has won the 2012 AluFoil Trophy in the Technical Innovation category.
"The European Aluminum Foil
Association judges liked the simple, but effective use of aluminium to
simultaneously provide heat shielding and reduce parasitic noise. The designer
had to 'think outside the box' to come up with a solution and used aluminium [sic]
foil to great effect, showing a great technical understanding of the material
and its capabilities," says Antoinette Devine, head judge for this year's
Alufoil Trophy and global packaging consultant for SABMiller.
The product was a result of a
co-development project between Lüdenscheid, Packaging & Converting and
Lydall's Applied Technology Group. The multilayer material consists of two thin
layers of aluminum that are laminated together by a visco-elastic polymer. The
highly reflective surfaces of the aluminum layers provide heat shielding at
elevated temperatures. The visco-elastic layer serves to reduce the lumped
thermal conductivity of the composite, enhancing its thermal performance, and
effectively damps and dissipates vibration energy to eliminate parasitic noise.
The vibration damping capacity of Lydall's CLD material has resulted in several
German luxury car manufacturers to specify this material for current and future
powertrain applications. The approach of adding acoustic functions to
traditional thermal products is a growing trend in the global automotive