We have developed a new liquid-applied sound deadener material (LASD) that replaces asphalt-type dampening materials to reduce both automotive weight and the workload of factory associates. Compared to a loss factor of 0.30, this LASD is 62% lighter than conventional materials; compared to an area weight of 2.4kg/m2, it displays a 172% higher loss factor.This effect was obtained because the developed liquid-applied sound deadener material uses acrylic resin with a maximum tan δ at 34°C, with the expansion ratio set to 1.8 times. In addition, the viscosity of the liquid-applied sound deadener material was adjusted so the thixotropy would be high at shear speeds of 10 to 3000S-1 to minimize irregularities in the surface when a slit nozzle is used to apply the sound deadener material.


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    Title :

    Development of a Light-weight High-dampening Liquid-applied Sound Deadener Material


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2006 World Congress & Exhibition ; 2006



    Publication date :

    2006-04-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development of a light-weight high-dampening liquid-applied sound deadener material

    Tsuruta,N. / Npguchi,Y. / Suzuki,H. et al. | Automotive engineering | 2006


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