Title:
吸音性多層複合材料
Document Type and Number:
Japanese Patent JP5091671
Kind Code:
B2
Abstract:
A sound absorptive multilayer composite having an air-impermeable barrier, an air-permeable reinforcing core having an airflow resistance of at least about 100 mks Rayls and a thickness at least about 1/3 the final composite thickness, an air-permeable open cell foam or fibrous pad having an airflow resistance less than about 2000 mks Rayls and a thickness at least about 1/10 the final composite thickness and a semipermeable airflow-resistive membrane having an airflow resistance of about 500 to about 4000 mks Rayls can provide improved acoustic performance. For example, existing vehicular headliner designs may be improved by adding a properly chosen and properly positioned semipermeable airflow-resistive membrane, a properly chosen and properly positioned air-impermeable barrier, or a properly chosen and properly positioned open cell foam layer.
Inventors:
Delton Earl Thompson Jr.
Xiaohe Liu
Xiaohe Liu
Application Number:
JP2007520307A
Publication Date:
December 05, 2012
Filing Date:
June 03, 2005
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
International Classes:
B01D53/22; B01D67/00; B01D69/02; B32B5/02; B32B5/18; B32B5/32; B32B7/022; B32B27/12; B60R13/08; G10K11/162
Domestic Patent References:
| JP2003515494A | ||||
| JP2002505209A | ||||
| JP2006513057A | ||||
| JP2008505022A |
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Muneo Yamamoto
Masaishi Nishishita
Takuji Yamada
Muneo Yamamoto
Masaishi Nishishita