Toray Industries, Inc.

Junpei Ohashi

Shotaro Tanaka

Yasushi Takada

Takashi Mimura

Yasuyuki Ishida

Tatsuro Tsuchimoto

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.

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Otsu, Japan

Junpei Ohashi