Toray Industries, Inc.

Tdk Corporation

Takashi Tanoue

Toru Sugahara

Hiroshi Kurihara

Kazuya Matsumura

Miki Kasabo

Toshifumi Saito

Flame-resistant paper for radio wave absorber members includes 40 to 70% by mass of pulp; 5 to 50% by mass of aluminum hydroxide powder; and 3 to 15% by mass of a flame retardant consisting of a polyborate, wherein the flame retardant consisting of a polyborate is contained in an amount of 7 to 25% by mass relative to the amount of the pulp.

Flame-resistant paper for wave absorber member and wave absorber member

An electromagnetic wave absorber has a configuration in which at least three hollow tetrahedrons, each having one open face, are connected to one another so that each surface opposite to a respective open face of the hollow tetrahedrons defines a respective side face of a hollow pyramid. Preferably, the electromagnetic wave absorber is made of sheet electromagnetic wave absorption members, which have a corrugated board structure in which at least one sheet includes an electrically conductive material. The electromagnetic wave absorber is low-cost, has reduced transport volume, excellent electromagnetic wave absorption characteristics from low frequency to high frequency with a shorter absorber length, has no or small difference in characteristics due to polarization plane, is lightweight and high in structural strength, and easy to manufacture and install.

Electromagnetic wave absorber, manufacturing method thereof and electromagnetic wave anechoic room

Growing community of inventors

Shiga, Japan

Takashi Tanoue