Toray Industries, Inc.

Shotaro Tanaka

Yasushi Takada

Junpei Ohashi

Kazuyoshi Ota

Takashi Mimura

Tatsuro Tsuchimoto

An electrically conductive film has an electrically conductive layer on at least one side, which is a thermoplastic resin film in which the electrically conductive layer contains a carbon nanotube (A), a carbon nanotube dispersant (B) and a binder resin (C), the total of contents of (A), (B) and (C) in the electrically conductive layer is 90% by weight or more relative to the entire electrically conductive layer, and weight rates of (A), (B) and (C) satisfy the following, and a weight ratio of (B) and (A) ((B)/(A)) is 0.5 or more and 15.0 or less:

Electrically conductive film

An electrically conductive film has an electrically conductive layer on at least one side, which is a thermoplastic resin film in which the electrically conductive layer contains a carbon nanotube (A), a carbon nanotube dispersant (B) and a binder resin (C), the total of contents of (A), (B) and (C) in the electrically conductive layer is 90% by weight or more relative to the entire electrically conductive layer, and weight rates of (A), (B) and (C) satisfy the following, and a weight ratio of (B) and (A) ((B)/(A)) is 0.5 or more and 15.0 or less: (A) 1.0 to 40.0% by weight, (B) 0.5 to 90.0% by weight, and (C) 4.0 to 98.5% by weight (provided that the total of contents of (A), (B) and (C) is let to be 100% by weight).

Process for producing electrically conductive film

A conductive film has transparency and a high level of electrical conductivity, which is used for an electromagnetic interference film hardly causing a moir&#xe9; phenomenon, and the like. To achieve the above-mentioned aim, the following disclosure is disclosed. A conductive film in which a conductive portion of a random network structure is present on at least one surface of a base film, a line width of the conductive portion composing the network structure is 30 &#x3bc;m or less, an area of portions where the conductive portion is not present is 50% or more with respect to an area of the conductive film, and an average of ratios of a major axis length to a minor axis length of an area surrounded by the network of the conductive portion, in which the base film is exposed, is larger than 1 and is equal to or less than 3.5.

Conductive film

The present invention is a flame-retardant polyester film including resin layers laminated on both surfaces of a polyester film, wherein the resin layer satisfies 15&#x2266;(Wc&#x2212;Wc)/Wc&#xd7;100&#x2266;99 (where Wcrepresents the weight of the resin layer, Wcrepresents the weight of the resin layer after the temperature thereof is raised from 25&#xb0; C. to 600&#xb0; C. in air, and Wcrepresents the weight of the resin layer after the temperature thereof is raised from 25&#xb0; C. to 800&#xb0; C. in air), and has a non-flammable gas generating rate of 3 to 40 percent over the range of 180&#xb0; C. to 450&#xb0; C. The present invention provides a flame-retardant polyester film having an excellent flame retardancy, and adhesive tapes, flexible printed circuits, a membrane switch, a film heater, and a flat cable, each including the flame-retardant polyester film.

Flame retardant polyester film and processed product including the same

The present invention is to provide a laminated polyester film with excellent adhesive properties for use in a laminating material, and the laminated polyester film is a film in which a resin layer including a polyester resin and a oxazoline-based cross-linking agent is laminated on at least one side surface of polyester film, diethylene glycol accounts for 40 mole % or more of all diol components constituting the polyester resin and the mass ratio of the polyester resin to the oxazoline-based cross-linking agent resin layer is within a range of 20/80 to 80/20. Furthermore, the present invention is to provide a flame-retardant polyester film in which a polyimide-including layer is laminated on both sides of the laminated polyester film and also a copper-clad laminated plate in which the flame-retardant polyester film is used, and also a circuit substrate in which the copper-clad laminated plate is used.

Growing community of inventors

Otsu, Japan

Shotaro Tanaka