Abstract: A method of manufacturing an organic electroluminescence element having on a belt-formed flexible base material, a first electrode, at least one organic functional layer, and a second electrode, includes continuously forming at least one organic functional layer by coating the same on a first electrode which is formed continuously on the flexible base material in the conveying direction thereof, further forming a second electrode on the organic functional layer, so as to make a plurality of organic electroluminescence element structures in the conveying direction, and then cutting the electroluminescence element structures into individual organic electroluminescence elements so as to manufacture organic electroluminescence elements.

Abstract: Disclosed are a coating method of forming a coating with a stable thickness from a coating solution with a low viscosity employing a slit-type die coater and an organic electroluminescence element prepared employing the coating method. The coating method employing a slit-type die coater comprises the steps of allowing a lip tip of the slit-type die coater to bring close to the substrate to form a coating solution bead between the lip tip and the substrate, and coating on the substrate a coating solution ejected from a slit outlet at the lip tip while relatively moving the slit-type die coater and the substrate, thereby forming at least two coating layers in the stripe shape, featured in that the lip tip has at least one groove in the coating region in the coating width direction, and a pressure at the slit outlet of the coating solution of the bead is negative or zero.

Abstract: A method of manufacturing an organic electroluminescence element having on a belt-formed flexible base material, a first electrode, at least one organic functional layer, and a second electrode, includes continuously forming at least one organic functional layer by coating the same on a first electrode which is formed continuously on the flexible base material in the conveying direction thereof, further forming a second electrode on the organic functional layer, so as to make a plurality of organic electroluminescence element structures in the conveying direction, and then cutting the electroluminescence element structures into individual organic electroluminescence elements so as to manufacture organic electroluminescence elements.

Abstract: Disclosed are a coating method of forming a coating with a stable thickness from a coating solution with a low viscosity employing a slit-type die coater and an organic electroluminescence element prepared employing the coating method. The coating method employing a slit-type die coater comprises the steps of allowing a lip tip of the slit-type die coater to bring close to the substrate to form a coating solution bead between the lip tip and the substrate, and coating on the substrate a coating solution ejected from a slit outlet at the lip tip while relatively moving the slit-type die coater and the substrate, thereby forming at least two coating layers in the stripe shape, featured in that the lip tip has at least one groove in the coating region in the coating width direction, and a pressure at the slit outlet of the coating solution of the bead is negative or zero.

Abstract: A method of producing a die coater structured with at least two bars so as to form a pocket section to extend a coating liquid in a coating width direction, a coating liquid supply port to supply a coating liquid to the pocket section, and a slit section to discharge a coating liquid from the pocket section to a material to be coated, wherein at least a part of a surface of the two bars coming in contact with a coating liquid is covered with a fluorine-based resin, the method comprises steps of: a preheating step of conducting a preheating process for a bar with a preheating temperature higher than a baking temperature in a baking process in a covering step of a fluorine-based resin; a grinding step of grinding the bar subjected to the preliminary heating process; and the covering process of covering a part of a surface of the bar with a fluorine-based resin so as to form a covered section, wherein the surface of the bar was subjected to the grinding step and comes in contact with a coating liquid.

Abstract: A coating apparatus comprising a pocket section for spreading a coating solution across the coating width, a coating solution supply port for supplying this coating solution to the pocket section, and a slit section for discharging the coating solution from the pocket section to an object to be coated, the above-mentioned coating apparatus using a die coater incorporating at least two bars. In this coating apparatus, these bars are suspended with the end face of one them facing upward. After having been heat-treated in a heat treating furnace, these bars are treated by grinding.

Abstract: A coating apparatus having a die coater incorporating at least two bars, the die coater composed of a pocket section for extending a coating solution in a coating width direction, a coating solution supply port for supplying the coating solution to the pocket section, and a slit section for discharging the coating solution from the pocket section to an object to be coated, wherein at least a portion of the bar which forms a surface of the die coater and comes in contact with the coating solution is applied with coating of a fluorine based resin, and baking of the fluorine based resin is carried out in a backing furnace while the bar is suspended with one end face of the bar up, and then finish grinding is conducted for the bar.

Abstract: A coating apparatus comprising a pocket section for spreading a coating solution across the coating width, a coating solution supply port for supplying this coating solution to the pocket section, and a slit section for discharging the coating solution from the pocket section to an object to be coated, the above-mentioned coating apparatus using a die coater incorporating at least two bars. In this coating apparatus, these bars are suspended with the end face of one of them facing upward. After having been heat-treated in a heat treating furnace, these bars are treated by grinding.

Abstract: A method of producing a die coater structured with at least two bars so as to form a pocket section to extend a coating liquid in a coating width direction, a coating liquid supply port to supply a coating liquid to the pocket section, and a slit section to discharge a coating liquid from the pocket section to a material to be coated, wherein at least a part of a surface of the two bars coming in contact with a coating liquid is covered with a fluorine-based resin, the method comprises a covering process of covering a part of a surface of a bar coming in contact with a coating liquid with a fluorine-based resin; and a baking process of baking the fluorine-based resin covering the part of the surface of the bar at a temperature of 100 to 380° C.

Abstract: A method of producing a die coater structured with at least two bars so as to form a pocket section to extend a coating liquid in a coating width direction, a coating liquid supply port to supply a coating liquid to the pocket section, and a slit section to discharge a coating liquid from the pocket section to a material to be coated, wherein at least a part of a surface of the two bars coming in contact with a coating liquid is covered with a fluorine-based resin, the method comprises steps of: a preheating step of conducting a preheating process for a bar with a preheating temperature higher than a baking temperature in a baking process in a covering step of a fluorine-based resin; a grinding step of grinding the bar subjected to the preliminary heating process; and the covering process of covering a part of a surface of the bar with a fluorine-based resin so as to form a covered section, wherein the surface of the bar was subjected to the grinding step and comes in contact with a coating liquid.

Abstract: A coater comprises upstream and down stream side bars between which a pocket and a slit are formed. The coating apparatus satisfies the following conditional formula: 6(t1−3+t2−3)&mgr;×hw×u×Ls(Ls/2+Lp)L3/(h4E)≦&Dgr;hdmax/hd where Ls is a length (mm) of the slit, h is a gap (mm) of the slit, Lp is a length (mm) of a cross section of the pocket, L=Ls+Lp, E is a Young's modulus (Pa) of the upstream and downstream bars, t1 and t2 are a thickness (mm) of the thinnest portion of the upstream and downstream side bars at the pocket, &mgr; is a viscosity (Pa·s), u is a coating speed (mm/s), and &Dgr;hdmax is a permissible maximum value (mm) among differences &Dgr;hd (mm) between the maximum value and the minimum value in the dispersion of a dried layer thickness hd.

Abstract: A coater comprises upstream and down stream side bars between which a pocket and a slit are formed.

Abstract: An extrusion coating method of extruding a coating solution from a coater onto a web-shaped substrate, comprising steps of: conveying the substrate in a conveying direction; supporting by coming in contact with a first side surface of the substrate by a back-roll; and extruding simultaneously at least a lowermost layer solution and an adjacent layer solution onto a second side surface of the supported substrate in such a way that the lower most layer solution is coated on the second surface and the adjacent layer is superimposed on the lowermost layer solution, wherein a viscosity Va (Pa·s) of the lowermost layer solution and a viscosity Vb (Pa·s) of the adjacent layer solution satisfy the following formula:

Abstract: A coating apparatus includes: a conveyor for conveying an object to be coated; and a coater for coating a coating liquid by jetting the coating liquid from a slit in a film shape and by causing the coating liquid to collide with the object to be coated. The coater is not in contact with the object to be coated, and a clearance of a slit exit d (m) of the coater satisfies a relation of 0<d≦5×10−5 (m). The clearance of the slit exit of the coater is smaller than a clearance of a slit inlet through which the coating liquid is injected, the slit has, on a side of the slit exit, slit side surfaces which face each other to be in parallel.

Abstract: An extrusion-type coating apparatus for performing a uniform coating on a web by equalizing a flow rate distribution of a coating material along the widthwise direction of the web. The apparatus has a slit in a coating head to pass the coating material from the bottom of the slit to an opening of the same opened on a surface portion of the coating head, a feeder to feed the web on the surface portion in a direction from a front edge to a rear edge of the opening of the slit and a restricting member to restrict a gap of the slit by an insertion of the restricting member into the slit. The restricting member has a thickness pattern along its length so as to equalize the flow rate of the coating material along the length of the slit.

Abstract: An extrusion coating apparatus for magnetic recording media, which have excellent electro-magnetic conversion characteristics, is capable of coating thin layers stably at high speed. The object of the invention is achieved by the use of certain predetermined shapes for edges of the coating head.

Abstract: A magnetic recording medium is disclosed which comprises a first magnetic layer on a nonmagnetic support and a second magnetic layer on the first magnetic layer.The first magnetic layer contains A parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, and the second magnetic layer contains B parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, wherein A is smaller than B.This magnetic recording medium is characterized in that: the magnetic recording medium does not stain the conveyance rollers in the manufacturing process; problems which tend to occur when running conventional tapes are greatly reduced; and it is suitable for use as a video tape.

Abstract: An extruder for coating magnetic layers onto electro-magnetic recording tape is disclosed, which is provided with two reservoirs and two outlet channels so as to permit simultaneous coating of two layers. The two outlet channels meet at an angle and merge into a single outlet channel, which extrudes the two layers between a front edge and a rear edge. The front edge has a shape of curvature, and the rear edge protrudes beyond a tangential line drawn from the end of the front edge curvature. The extruder is capable of producing double layered magnetic tape with or without a mixed zone between layers.

Abstract: A coating apparatus having a first slot between its front and center edges and a second slot between its center and back edges, wherein a coating solution is extruded continuously from each of the slots onto the surface of a flexible support running continuously along the edge surfaces of the front, center, and back edges in that order.The front edge surface has a straight-line portion on at least the terminal end portion of the front edge so that the straight-line portion extends along the direction of movement of the support and is not longer than one mm, and at least one portion of the center and back edge surfaces protrudes from the extension line of the straight-line toward the support.The coating apparatus is suitable for preparing magnetic recording media.

Abstract: The invention provides an apparatus for coating a solution on a tape-shaped flexible support which is moved so as to run along a top surface of coating head. The coating head is slitted so as to form a front edge surface, a back edge surface in order in the moving direction of the flexible support, and a slit therebetween so that the solution is extruded through the slit of the coating head to the flexible support. In this configuration, at least a part of the back edge surface projects beyond the tangent line at the downstream end of the front edge surface.