{
  "$type": "site.standard.document",
  "description": "A lightweight sound insulation material (10) with improved sound absorption performance and sound insulation performance and a method for forming the sound insulation material are provided. A high-density air-permeability adjustment film (12) is formed by heating and pressurizing at least a surface…",
  "path": "/patents/999525",
  "publishedAt": "2012-08-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B32B27/02",
    "HIROTANI CO LTD [JP]"
  ],
  "textContent": "A lightweight sound insulation material (10) with improved sound absorption performance and sound insulation performance and a method for forming the sound insulation material are provided. A high-density air-permeability adjustment film (12) is formed by heating and pressurizing at least a surface of a nonwoven fabric (11) including microfibers and thermal adhesive fibers. The air-permeability adjustment film (12) is made of the same material as a base material (11), and a two-layer structure including the air-permeability adjustment film (12) and the base material (11) is obtained. Thus, it is possible to improve both sound absorption performance and sound insulation performance, while achieving weight reduction.",
  "title": "Sound insulation material for vehicle and method for forming the same"
}