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Light weight acoustic trim part

  • US 10,457,225 B2
  • Filed: 10/26/2015
  • Issued: 10/29/2019
  • Est. Priority Date: 10/30/2014
  • Status: Active Grant
First Claim
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1. Multilayer Automotive trim part for noise attenuation comprising at least two fibrous layers and at least one air permeable intermediate film layer between the at least two fibrous layers, whereby all layers together have a variable thickness characterized in that at least for an area with a thickness between 4 and 12.5 mm the overall air flow resistance (AFRoverall) and the overall density custom character relate as follows 1500<

  • AFRoverall

    10custom character<

    3800 with AFRoverall in Nsm

    3
    and custom character in kg/m3.

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