Title:
SOUND INSULATION MATERIAL
Document Type and Number:
Japanese Patent JP2019035821
Kind Code:
A
Abstract:
To provide a sound insulation material which has both excellent lightweight and sound insulation properties.SOLUTION: A sound insulation material 1 comprises a foamed part 2 and a surface layer 3 covering the foamed part 2. The foamed part 2 and surface layer 3 are both made of mutually different materials. The foamed part 2 has a density equal to or less than 100 kg/m, and the surface layer 3 has a density more than 100 and equal to or less than 10,000 kg/m, and has a permeation amount equal to or less than 5 L/min/cm.SELECTED DRAWING: Figure 1
Inventors:
KAI MAKOTO
YUZAWA TATSUO
YUZAWA TATSUO
Application Number:
JP2017156011A
Publication Date:
March 07, 2019
Filing Date:
August 10, 2017
Export Citation:
Assignee:
NITTO DENKO CORP
International Classes:
G10K11/168; B32B5/18; B60R13/08
Attorney, Agent or Firm:
Hiroyuki Okamoto
Shinichi Uda
Shinichi Uda