| 摘要 |
PROBLEM TO BE SOLVED: To make operability excellent by making it hard to occur what is called blocking wherein two or more acoustic materials are in contact when a plurality of acoustic materials which are stacked in a laminated state are separated into sheets for use. SOLUTION: An acoustic material 10 having a resin film 21 laminated on one surface of a sheet type base material 11 made of a soft foam is such that a surface of the resin film 21 is roughened, and an embossed pattern 14 is formed on the opposite surface of the sheet type base material 11 from the surface where the resin film 21 is laminated to make blocking hard to occur by the roughened surface of the resin film 21 and the embossed pattern of the sheet type base material 11. The roughened surface 22 of the resin film 21 has surface roughness of preferably 0.3 to 1.0. The embossed pattern 14 of the sheet type base material 11 is formed preferably by transfer using a release sheet when the acoustic material is manufactured. COPYRIGHT: (C)2006,JPO&NCIPI
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