Abstract: Provided are: an oligomer of polyimide copolymer which is an intermediate of a polyimide copolymer having excellent utility and satisfying solvent solubility, storage stability and heat resistance at high levels; a polyimide copolymer obtained therefrom; and their production methods. The oligomer of polyimide copolymer and the polyimide copolymer are obtained by copolymerizing (A) 3,3?,4,4?-biphenyltetracarboxylic dianhydride and/or 3,3?,4,4?-diphenylsulfonetetracarboxylic dianhydride with (B) at least one diamine and/or diisocyanate represented by the following Formulae (1) to (3): (wherein, X represents an amino group or an isocyanate group; R1 to R8 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and at least one of the R1 to R8 is not a hydrogen atom).

Abstract: The present device is an adhesive sheet having an adhesive layer consisting of an adhesive composition containing a thermosetting resin and a thermal foaming agent and a coating layer. The coating layer having a resin and provided on the adhesive layer. The coating layer is characterized in that it does not exhibit tackiness at room temperature. In addition, at least a part of the coating layer disappears in a region ranging from an interface between the adhesive layer and the coating layer to a surface of the coating layer by heating the adhesive sheet at a temperature not lower than a curing starting temperature of the adhesive layer and wherein the following inequation is satisfied: T3<T1, T1 is a thermal foaming temperature of the thermal foaming agent, and T3 is a glass transition temperature of the coating layer.

Abstract: An one-part epoxy resin composition for the use of bonding of a coil which is preferable for impregnation of a motor and a generator for an automobile, especially of a drive motor-generator set for a hybrid car, which has superior storage stability and a cured resin of the composition has excellent adhesion properties, thermal stability, and reliability, are provided. The one-part epoxy resin composition of the present invention comprises (A) a bisphenol A type and/or F type epoxy resin which is in liquid form at room temperature, (B) methylnadic anhydride as a cycloaliphatic anhydride which is in liquid form at room temperature, and (C) a nitrogen-containing latent hardening accelerator.

Abstract: According to the present invention, a gas tank having a gas-barrier inner shell and an outer shell that is formed so as to cover the inner shell and is made of a pressure-resistant FRP, such outer shell comprising reinforcing fiber bundles (A), a thermosetting resin (B), and an elastomer particles and/or thermoplastic resin particles (C), provided that elastomer particles and/or thermoplastic resin particles (C) that have been dispersed in a thermosetting resin (B) exist in reinforcing fiber bundles (A), is provided. Such gas tank is excellent in strength and heat resistance and has suppressed gas permeability.

Abstract: A multi-layered adhesive sheet is provided, including a metal sheet and at least two thermosetting resin layers having different functions on at least one side of the metal sheet.

Abstract: The present invention provides an adhesive sheet which exhibits bonding strength without formation of lifting even in a curved section and excels in heat resistance. The multi-layered adhesive sheet includes a metal sheet and at least two thermosetting resin layers having different functions on at least one side of the metal sheet.

Abstract: Proposed are novel ink-jet recording sheet having high water resistance, excellent transparency of the ink-receptive layer, ink absorptivity and color developability as well as the advantages of absence of surface tackiness and blocking and a liquid coating composition for forming the ink-receptive coating layer of the recording sheet. The liquid coating composition comprises, as a uniform blend in an aqueous medium: (A) an acetoacetylated polyvinyl alcohol; (B) a polyvinylpyrrolidone resin; and (C) an acidic aqueous dispersion of a colloidal silica, each in a specified weight proportion, in a limited weight proportion.

Abstract: A diazo-containing photosensitive material comprising a transparent support, and a diazo-containing photosensitive layer provided over a surface of the support and containing a binder, a diazo compound and a coupler, wherein the diazo compound is represented by the following formula: (wherein R1 and R2 stand, independently from each other, for a lower alkyl group and X stands for an anionic group), wherein the coupler comprises phenylphenol and 3,5-dihydroxy-4-bromobenzoic acid, and wherein the binder comprises a cellulose ester cross-linked with a lower-alkylated urea resin.

Abstract: A film applying apparatus 10 is provided with preparatory bonding rolls 20A, 20B and laminating rolls 21A, 21B, and a laminated film 12 wound out from a film roll 18 and a substrate 16 conveyed by a substrate conveying device 14 pass between these rolls and pressure bonding is performed. Diameter of the preparatory bonding rolls 20A, 20B is made smaller than diameter of the laminating rolls 21A, 21B and range of elastic deformable area S1 at the roll surface at grasping starting of the substrate and the laminated film 12 by the preparatory bonding rolls 20A, 20B is made small thereby range of generating, air holding or the like is limited to small.

Abstract: A film applying apparatus is provided with preparatory bonding rolls, laminating rolls, a laminated film wound out from a film roll and a substrate conveyed by a substrate conveying device. The laminated film passes between these rolls and pressure bonding is performed. The diameter of the preparatory bonding rolls is made smaller than the diameter of the laminating rolls. The range of the elastically deformed area at the roll surface where the grasping of the substrate and the laminated film by the preparatory bonding rolls is begun, is made small, thereby limiting the range and reducing the generated amount of air holding or the like.

Abstract: Disclosed is a novel anti-reflective film used for reducing the adverse influences of stray light within an optical instrument such as photographic cameras by attaching onto the inner walls of the instrument. The anti-reflective film consists of a substrate film of a synthetic resin and an anti-reflective coating layer formed on one surface of the substrate film by coating with a coating composition comprising (a) a synthetic resin as a binder to form the matrix phase of the coating layer, (b) particles of a synthetic resin having an average particle diameter in the range from 15 to 50 .mu.m dispersed in the matrix phase, and (c) particles of carbon having an average particle diameter not exceeding 2 .mu.m dispersed in the matrix phase.

Abstract: Provided by the invention is a recording film suitable for recording by using an ink-jet printer capable of giving very sharp printed images and having advantages of rapid drying of the water-base printing ink thereon and little re-transfer of the printed images directly after printing onto the surface coming into contact with the printed surface of the recording film. The recording film is a layered sheet material comprising (A) a base film of a plastic resin; (B) an ink-receptive layer formed from a mixture of a polyvinyl alcohol and a polyvinyl pyrrolidone; and (C) an overcoating layer on the ink-receptive layer. The overcoating layer is formed from a mixture of a water-insoluble polyvinyl acetal resin, fine particles of an acrylic resin and a polyvinyl pyrrolidone.

Abstract: An ink-jet recording film capable of exhibiting excellent ink fixing behavior in ink-jet printing with a water-base ink along with good water resistance of the recording layer, which has a double-layered structure, as formed on the surface of a plastic substrate film, consisting of (A) an ink-receptive layer comprising a water-soluble resin, e.g., polyvinyl alcohol, polyvinyl acetal and/or polyvinyl pyrrolidone, a surface-roughening agent which is a combination of two different silica powders distinguishable in the low and high values of oil absorption in a specified weight proportion and a crosslinking agent for the water-soluble resin and (B) an overcoating layer for dot-profile control consisting of an acrylic resin of the quaternary ammonium salt type.

Abstract: Disclosed is a novel aqueous suspension of an antimicrobial compound having high stability of the suspension despite the use of such a very small amount of a suspending agent as not to cause any adverse influences on the inherent activity of the active ingredient. The suspending agent is a biocellulose as a microbial products of certain acetic bacteria which is not used in the prior art as a suspending agent in the prior art due to susceptibility to putrefaction while this defect of the biocellulose can be solved in the antimicrobial aqueous suspension by the use of an antimicrobial compound such as 2-methoxycarbonylamino benzimidazole, 2-pyridinethiol zinc-1-oxide and 2-(4-thiazolyl) benzimidazole.

Abstract: Proposed is a flame-retardant heat-curable flowable epoxy resin composition suitable for use in case potting of film capacitors exhibiting very little settling of the particulate ingredients in storage and excellent impregnability in case potting as well as excellent flame retardancy, moisture resistance and tracking resistance of the composition after curing. The composition comprises, as a uniform blend:(a) 100 parts by weight of a bisphenol-based epoxy resin which is liquid at a temperature of working in case potting;(b) from 10 to 40 parts by weight of an alkyleneglycol diglycidyl ether or cycloalkyleneglycol diglycidyl ether;(c) from 80 to 120 parts by weight of a polycarboxylic acid anhydride;(d) from 4 to 20 parts by weight of a powder of red phosphorus; and(e) from 100 to 200 parts by weight of a powder of hydrated alumina which characteristically is a combination of (e1) from 80 to 95% by weight of a first powder of hydrated alumina having an average particle diameter in the range from 10 to 25 .mu.

Abstract: A film applying apparatus includes a presser roll reciprocally movable toward and away from the leading end portion of a tacking member to force an adhesive tape against a cover film of the laminated film while the laminated film is held by suction on a surface at the leading end portion of the tacking member. The surface of the tacking member includes a first and a second beveled surface. When the presser roll is advanced by a presser roll actuating device, it rolls on from the first beveled surface to a leading end of the second beveled surface during which time the adhesive tape is firmly adhered to the cover film. Then the presser roll is retracted and, at the same time, the adhesive tape is pulled by an adhesive-tape pullback device in a direction away from the tacking member whereupon the cover film adhered to the adhesive tape is separated from the laminated film. After the tacking is completed, a film tensioning device is driven to pull the laminated film backward.

Abstract: A powder coating composition is disclosed which includes (a) 100 parts by weight of a mixed epoxy resin having an epoxy equivalent of 800-2000 and containing (a-1) a diglycidyl ether of bisphenol A having an epoxy equivalent of 180-2500 and (a-2) a rubber-modified epoxy resin having an epoxy equivalent of 180-2500 and obtained by reaction of a diglycidyl ether of bisphenol A with a carboxyl terminated acrylonitrile-butadiene copolymer; (b) a mixed curing agent consisting of (b-1) 0.05-5 parts by weight of an imidazole compound, (b-2) 0.5-10 parts by weight of dicyanodiamide and (b-3) 1-10 parts by weight of a dihydrazide of a dibasic carboxylic acid; and (c) 50-100 parts by weight of silica.

Abstract: A method and apparatus in which a succession of continuous films each composed of a support film, a photosensitive resin layer and a cover film laminated one above another are joined end to end and fed continuously while allowing the cover film to be separated. While the trailing end of a preceding continuous film is held by suction on a first suction device, the leading end of a succeeding continuous film drawn out from a succeeding film supply roll is bonded to a part of the adhesive surface of an adhesive single coated tape previously held by suction on a second suction device, and the remaining part of the adhesive surface of the adhesive single coated tape is forced against the trailing end of the preceding continuous film being held on the first suction device to thereby join the leading end and the trailing end via the adhesive single coated tape without forming an overlap.

Abstract: A laminator for laminating a film sheet on a surface of a substrate comprises: a pressure roller; a conveyor roller for supplying a substrate to the pressure roller; a film sheet-supplier which is reciprocally movable up and down for attaching a front end of a continuous flexible film sheet onto the front end of the surface of the substrate which has been moved by the conveyor roller and is stopped in front of the pressure roller; and a film sheet end-holder which is movable forward and backward and has on its front end a gas blowing face having a curve corresponding to the curve of the surface of the pressure roller so as to hold the film sheet in contact with the surface of the pressure roller.

Abstract: A film applying apparatus for applying a film including a photosensitive layer to a printed circuit board and the like, a film holding member for wrapping the leading edge of a film and stationary-knife support members are supported on the same fore-and-aft guide rails for synchronous reciprocating movement relative to a film passage plane; the film holding member is floatingly supported by floating mechanisms for movement in a direction perpendicular to a base-plate conveyance plane I--I; and the film holding member is driven by the tacking member via pressure mechanisms to move between a position in which it is spaced from the stationary-knife support members, and a position in which it comes in contact with the stationary-knife support members.