Noise isolation sheet

Abstract

There is provided a noise isolation sheet 100 which is installed in a car door comprising a door inner panel 11 and an interior door trim 12 . The door trim 12 is provided inside the door inner panel 11 . The noise isolation sheet 100 partially or wholly covers the door inner panel 11 . The noise isolation sheet 100 is at least a double layer comprising an outer side sheet 101 and an inner side sheet 102 . The outer side sheet 101 is a sheet made of a foam body having water absorption of less than 30%, and the inner side sheet 102 is a sheet made of a foam body having water absorption of 30% or more.

We claim:  
     
         1 . A noise isolation sheet partially or wholly covering a panel provided inside a car door wherein, 
 said noise isolation sheet is at least a double layer comprising an outer side sheet and an inner side sheet;    said outer side sheet is a sheet made of a foam body having water absorption of less than 30%;    and said inner side sheet is a sheet made of a foam body having water absorption of 30% or more.    
     
     
         2 . A noise isolation sheet provided to a car door comprising a door inner panel and an interior door trim provided inside said door inner panel wherein, 
 said noise isolation sheet partially or wholly covers said door inner panel;    said noise isolation sheet is at least a double layer comprising an outer side sheet and an inner side sheet;    said outer side sheet is a sheet made of a foam body having water absorption of less than 30%;    and said inner side sheet is a sheet made of a foam body having water absorption of 30% or more.