| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a radio wave absorptive package for portable telephones which adequately controls the electromagnetic wave leakage at terminating/ transmitting and call intensities, has a radio wave absorption for radio waves of unwanted frequencies, prevents malfunction of peripheral apparatus and adverse influences on the user, does not lose its transparency, avoids forming a moire for the visibility of the package, and has a superior button operability for the user. SOLUTION: The package has a button operation side A and the other B side, when it houses a portable telephone. The side A of the package is made of a sheet material having an interior transparency, and a soft electromagnetic wave absorption performance having an electromagnetic wave absorption power of 5-20 dB in radio wave absorption effect power by the near magnetic field probe method. The sheet material is a sheet having a radio wave absorber 2 at least one side of a base film 1. The side B of the package is made of a sheet material having or not having an interior transparency, and having an electromagnetic wave absorption power of 5 dB or more in radio wave absorption effect power by the near magnetic field probe method.</p> |
