摘要:
The invention provides novel thermoplastic polyimide featuring solid adhesive property under low temperature, low hygroscopic coefficient, and solid resistivity to radioactive rays. The invention also provides novel polyamide acid which is substantially precursor of the thermoplastic polyimide, and also provides novel thermally fusible laminated film for covering conductive wires, featuring solid adhesive property under low temperature, solid resistivity to radioactive rays, and distinct suitability for covering superconductive wires in particular.The novel thermoplastic polyimide is represented by general formula (1) corresponding to the chemical structure shown below; ##STR1## wherein, Ar.sub.1, Ar.sub.2, Ar.sub.4, and Ar.sub.6, respectively designate divalent organic radical, whereas Ar.sub.3 and Ar.sub.5 respectively designate quadrivalent organic radical, wherein, 1, m, and n, respectively designate positive integer 0 to 1 or more than 1, wherein the sum of 1 and m aggregates 1 or more than 1, and wherein t designates positive integer of 1 or more than 1.
摘要:
A thermoplastic polyimide film comprising a thermoplastic polyimide polymer, a polyimide laminate, respectively being suited for use as cover-lay adhesive agent and a cover-lay film capable of exerting distinguished thermal resistant property, processability and adhesion property useful for the manufacture of flexible printed circuit boards, and yet, suited for use as the adhesive-agent layers of flexible copper-coated laminates and bilateral adhesive sheets; and a method of manufacturing the polyimide laminate. The thermoplastic polyimide polymer represented by the general formula (1) specified below: ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.4 and Ar.sub.6, represents divalent organic radical, whereas Ar.sub.3 and Ar.sub.5 represent quadrivalent organic radical, wherein l, m amd n designate positive integer of 0 to 15, wherein the sum of 1 and m is 1 or more than 1, and wherein t designates positive integer of 1 or more than 1.
摘要:
A novel heat-fusible copolymer possessing a combination of excellent properties, including mechanical strength, resistivity against radioactive rays, chemical resistance, low temperature stability, thermal resistance, processabilty, adhesiveness, thermal fusible adhesive stability, and simultaneously satisfying requirements relating to low hygroscopic characteristic and stable dielectric constant. Also, a powder, film, laminated film, laminated insulating material, and article, such as electronic modules and capacitors, made from a thermoplastic polyimide resin composed mainly of the copolymer and suitable for use as electronic components and materials for electronic circuit components. The copolymer possesses a glass transition temperature of 100.degree. C. to 250.degree. C., a hygroscopic degree of 1 or less, and a dielectric rate of 3 or less, and has the following formula: ##STR1## wherein Ar.sub.1 represents a quadrivalent organic radical, Ar.sub.2 represents a divalent organic radial, R represents a divalent organic radical, X represents trivalent bonding radicals, m and n are each integers of 0 or more, the sum of m and n being an integer of 1 or more, and 1 is an integer of 1 or more.
摘要:
A process for producing a flexible printed circuit board comprising a metallic foil and a polyimide is provided, which comprises coating a metallic foil with a resin solution prepared by adding a tertiary amino compound to a solution of a polyamic acid (a polyimide precursor) represented by the following general formula (I): ##STR1## followed by the imidization thereof, the amount of said tertiary amino compound added to the solution being 10 to 50 parts by weight per 100 parts by weight of solid polyamic acid contained in said resin solution. According to the present invention, a flexible printed circuit board which is free from curling, wrinkling and warping, and which has excellent heat resistance, electrical characteristics and mechanical properties is provided with a simplified production process.
摘要:
The invention discloses a thermosetting imide oligomer represented by the general formula (1A) or (1B): ##STR1## Where Ar.sub.1 indicates a tetravalent aromatic group, Ar.sub.2 indicates a divalent aromatic group, Ar.sub.1 or Ar.sub.2 can be of the same or different kind, X indicates a trivalent group and it can be of the same or different kind, n is an integer selected from 1 to 15, and R is a substitution group having reactivity.The invention further discloses a method for manufacturing a heat resistant laminated sheet using the imide oligomer, which is excellent in heat resistance, hygroscopic resistance and electric properties.
摘要:
The present invention provides means for forming an oxide film on a metal surface, means for repairing a defect of an oxide film, a high-performance electrolytic capacitor using the means, and an electrolyte of the capacitor. Namely, the prevent invention provides a method for easily forming an oxide film on the surface of a metal or an alloy thereof by anodization using a solution containing an ionic liquid. In an application of this method, an electrolytic capacitor having means for repairing a defect of an oxide film can be formed by a method using, as an electrolyte, an ionic liquid, a solution containing an ionic liquid and a salt, or a solution containing an ionic liquid and a conductive polymer or a TCNQ salt, and a valve metal or an alloy thereof as a metal.
摘要:
A method of manufacturing a conductive polymer electrolytic capacitor comprising the step of aging a capacitor element including an electrolyte containing a conductive polymer and an ionic liquid by applying an aging voltage y (V) to the capacitor element to satisfy the following formula (1) or the following formula (2) is provided. In the following formulas (1) and (2), x represents a forming voltage for a valve metal. An electrolytic capacitor having a high withstand voltage is implemented by this method. 0.5x≦y≦x (0
摘要:
The present invention provides a method for producing a laminate suitable for a flexible circuit board which is free from visual defects such as wrinkles and curls that appear when a plurality of laminating materials containing a thermally fusible laminating material are formed by thermally laminating these materials each other using a thermal-press forming device, which comprises the steps of: arranging a heat resistant protective material between a pressing surface and the laminating materials, laminating the materials by thermal pressure at not lower than 200° C., wherein the bonded laminating materials are in contact with the protective material, cooling the bonded laminating materials, and peeling off the protective material from the bonded laminating materials, whereby the laminate with less nonuniformity in pressurization, a uniform surface, and a good inter-layer adhesion, and the method and device for producing the laminate can be provided, more particularly, the thermal pressure and forming is performed by a thermal-press forming device having at least a pair of metal rolls.
摘要:
The invention relates to a vent plug for a tire vulcanization mold used for a vent hole of the mold, the tire vulcanization mold, and a manufacturing method for the tire using the mold. The vent plug includes a plug holder with a hollow ventilation portion and a plug head within the ventilation portion. The plug holder includes a tapered seat portion, an inside diameter of which becomes smaller toward a mold rear side, and a cylinder portion located at the mold rear side of the seat portion. The plug head includes a tapered head portion, an outer diameter of which becomes smaller toward the mold rear side, a base body portion located at the mold rear side of the head portion, and a slit portion communicating with the ventilation portion from an upper end face of the plug head.
摘要:
Disclosed is an energy storage device having high energy density and excellent power density. For example, electric double layer capacitors, redox capacitors, lithium ion electrolyte type capacitors and devices applying any of them are greatly improved in the energy density without deteriorating their advantages such as high power density, high charge/discharge efficiency and long life. Specifically disclosed is an energy storage device containing a positive electrode, a negative electrode and an electrolyte solution, which device is characterized in that a compound capable of performing a doping/dedoping reaction is present in the electrolyte solution.