Tdk Electronics Company, Limited

Tdk Corporation

Eiji Horigome

Hitoshi Azegami

Hiroshi Ota

Hiroshi Kawahara

Hiroshi Ohta

Kiyonori Hinoki

Kazuo Katai

Yousuke Miyaki

Katsuo Naoi

Shinji Abe

Yuukichi Morita

Yutaka Nakashima

Toshikazu Yahata

The present invention provides an electrode for an electric double layer capacitor which enhances an adhesive property between an electrode layer and an etched aluminum foil current collector. An electrode for a capacitor, includes a current collector, an undercoat layer on the current collector, and an electrode layer on the undercoat layer, wherein the current collector is made of an aluminum foil; the undercoat layer includes at least electrically conductive particles (P) and a binder (B) in a weight ratio P/B of 0.25 to 2.33, and the binder (B) includes a fluorine-containing polymer as a main component; and the electrode layer includes at least a carbon material and a binder.

Electrode for capacitor

A non-magnetic base film is provided thereon with a magnetic layer having ferromagnetic powders dispersed in a binder. The binder contains 30 to 70% by weight of a polyurethane resin A having a glass transition temperature Tg conforming to 60.degree. C..ltoreq.Tg.ltoreq.80.degree. C., and 30 to 70% by weight of a polyurethane resin B having a glass transition temperature Tg conforming to 0.degree. C.&lt;Tg.ltoreq.30.degree. C. The polyurethane resins A and B, at least one which contains a polar group, account for 80 to 100% by weight of the binder. The magnetic recording medium can be fabricated with an improved processability to calendering, has excellent electromagnetic characteristics, allows detachment of powders from the edge portions in particular to be substantially avoided at normal temperature, and is improved in terms of running stability in a high-temperature environment.

Magnetic recording medium having a magnetic layer comprising

A magnetic recording medium having a magnetic layer comprising a magnetic powder and a resin binder, which is characterized by that the magnetic layer contains an ethylene trifluoride chloride polymer of a low degree of polymerization and a fatty acid ester.

Magnetic recording medium

A magnetic recording medium having two coated magnetic layers of a first magnetic layer and a second magnetic layer on a non-magnetic substrate. The first magnetic layer has a coercive force of 400 to 590 Oe and a thickness of 2.1 to 2.8.mu. and said second magnetic layer has a coercive force of 590 to 800 Oe and a thickness of at least 2.1.mu..

A magnetic recording medium which comprises a substrate coated with a magnetic paint which has a magnetic powder dispersed in a binder comprising a vinyl chloride - vinyl acetate copolymer containing at least 10% of polyvinyl alcohol, a urethane resin and a polyester resin.

A magnetic recording medium comprises a lower magnetic layer containing a magnetic powder having a coercive force of 700 Oe or higher dispersed in an organic binder which is coated on a non-magnetic substrate and an upper magnetic layer containing a magnetic powder having a coercive force higher than the coercive force of said lower magnetic la

A magnetic tape cassette comprises a pad support membrane made of a metal alloy such as bronze and nickel silver. The pad support membrane is coated with a synthetic resin layer containing a rust inhibitor.

Magnetic tape cassette

A magnetic recording medium consisting of a base coated with magnetic coating material which is a dispersion of magnetic particles using a vinyl chloride-vinyl acetate copolymer and a polyester resin as binder, characterized by the addition of a vinyl chloride-vinyl acetate copolymer containing at least 10% of vinyl alcohol. The use of the last-mentioned copolymer improves the frequency response characteristic as well as the mechanical properties such as the running quality.

A magnetic recording medium comprises a substrate coated with a magnetic layer comprising a magnetic powder and a binder and a rust inhibitor at a ratio of more than 0.1 wt. % based on resins of the binder.

A magnetic recording medium comprises a substrate coated with a magnetic layer comprising a magnetic powder, a thermosettable binder and a mixture of sorbitane mono-, di- and tri- higher fatty acid ester surfactants.

A magnetic recording medium comprises a substrate coated with a magnetic layer wherein a magnetic powder is orientated in a binder and a polyoxyethylenesorbitane higher fatty acid ester surfactant.

A magnetic recording medium made by coating a base with a magnetic coating material which is a dispersion of magnetic particles in a binder of synthetic resins using a polyfunctional aromatic isocyanate as a curing agent, characterized by the addition of a sorbitan stearate type surface active agent which has a sorbitol derivative in the hydrophilic group. The present magnetic recording medium has superior mechanical properties, especially a superior running quality as well as superior electromagnetic properties.

Magnetic recording medium and process

A magnetic recording medium comprises a substrate coated with a magnetic coating composition comprising nitrocellulose impregnated with a vinyl chloride-vinyl acetate-vinyl alcohol copolymer having a content of vinyl alcohol component of 8 wt. % or more, a magnetic powder, a solvent, and a thermal crosslinking agent.

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Tokyo, Japan

Eiji Horigome