Teijin Fibers Limited

Yuasa Corporation

Other

Teijin Limited

Skypia Co., Ltd.

Hiroyuki Mori

Masahiko Oshitani

Masaharu Watada

Keiichi Hasegawa

Akira Tanaka

Makoto Yoshida

Motoyasu Nakanishi

Michikage Matsui

Kenkichi Nose

Machiko Oouchida

Satoshi Nagase

Mikio Kusaka

Yasuo Motoishi

A communication sheet structure for transmitting electromagnetic waves, and thereby performing communication, is characterized in that the communication sheet structure includes a planar base material with a relative dielectric constant at a frequency of from 800 MHz to 10 GHz of from 1.0 to 15.0, and one side of the base material includes conductor A existing portion and non-existing portion, and the other side of the base material includes a conductor B existing over 90% or more thereof. The communication sheet structure enables communication in two dimensions, and the communication sheet structure is extremely excellent in communication performances.

Communication sheet structure

There is provided a membrane material for a gas holder having abrasion resistance and flex resistance usable as a gas holder, in addition to strength of a base fabric, and having high gas barrier properties. A membrane material for a gas holder, which is used in a gas holder for storing or recovering gas, includes at least 4 layers of a protective layer, a base fabric layer, a gas barrier layer and a protective layer laminated in this order.

Membrane material for gas holder and gas holder using the same

A biodegradable cellulose acetate foam with a foam cell size of 0.001-0.8 mm and an apparent density of 0.01-0.27 g/cm,, and a biodegradable cellulose acetate foam wherein the foam is treated with a weak alkali solution, and has an acetylation degree of 45-60% and no acetic acid odor.

Biodegradable cellulose acetate foam and process for its production

Cellulose acetate fiber having non-circular cross section,

A metal hydride electrode, in which a metallic cobalt powder is mixed, within a mixing range of 3 to 20 weight percents, with a hydrogen absorbing alloy powder formed by substituting a part of Ni of alloy expressed by a rational formula of MmNi.sub.5 with Al and at least one kind of Fe, Cu, Co, Mn, and the mixed powder is loaded in a porous alkaline-proof metal body. An nickel electrode, in which a cobalt monoxide powder is mixed with an active material powder within a mixing range of 5 to 15 weight percents, the active material powder comprising zinc existing within a range of 2 to 8 weight percents, under a solid solution state in a crystal of nickel hydroxide powder assuming a spherical shape including an inner pore volume of 0.14 ml/g or less, and the mixed powder is loaded in a porous alkaline-proof metal body. A nickel-hydrogen battery, in-which the foregoing metal hydride electrode and the foregoing nickel electrode are wound with a separator put between them, aqueous solution of potassium hydroxide is filled therein and sealed, and they are maintained under standing condition for 5 hours or more.

Metal hydride electrode, nickel electrode and nickel-hydrogen battery

Metal hydride electrode

Growing community of inventors

Ibaraki, Japan

Hiroyuki Mori