Abstract: A method of forming an organic compound layer for producing organic EL element exhibiting high quality and high productivity without increasing cost; a relevant process for producing an organic EL element. There is provided a method of forming an organic compound layer of organic EL element using production apparatus including supply section, coating•drying section and recovery section, characterized in that flexible band substrate (A) having an anode layer in roll form is fed to the supply section; the production apparatus has at least one unit coating•drying section, the unit containing coating section capable of forming coating film for formation of organic compound later under atmospheric pressure by wet applicator and drying section; and at least one organic compound layer is formed on the anode layer to obtain flexible band substrate (B), which is wound on a core to form a roll in the recovery section.

Abstract: A method of forming an organic compound layer for producing organic EL element exhibiting high quality and high productivity without increasing cost; a relevant process for producing an organic EL element. There is provided a method of forming an organic compound layer of organic EL element using production apparatus including supply section, coating•drying section and recovery section, characterized in that flexible band substrate (A) having an anode layer in roll form is fed to the supply section; the production apparatus has at least one unit coating•drying section, the unit containing coating section capable of forming coating film for formation of organic compound later under atmospheric pressure by wet applicator and drying section; and at least one organic compound layer is formed on the anode layer to obtain flexible band substrate (B), which is wound on a core to form a roll in the recovery section.

Abstract: An extruding coating method comprises steps of feeding a coating liquid into a coating liquid reservoir section provided with a slit having a slit width; and extruding the coating liquid through the slit so as to conduct coating, wherein the coating liquid is extruded through the slit by pushing the coating liquid in the coating liquid reservoir toward all over the slit width by a piston.

Abstract: An extruding coating method comprises steps of feeding a coating liquid into a coating liquid reservoir section provided with a slit having a slit width; and extruding the coating liquid through the slit so as to conduct coating, wherein the coating liquid is extruded through the slit by pushing the coating liquid in the coating liquid reservoir toward all over the slit width by a piston.

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: The center line average roughness (Ra) of the slit inner surfaces is made in a predetermined range of 5.0 .mu.m according to the present invention, and the straightness (W1) in the delivery direction of the coating solution thereof and the straightness (W2) in the perpendicular direction to the delivery direction thereof are made in predetermined ranges respectively in preferred embodiments. Thereby, development of wrinkles and inclined elongation in the tape itself are prevented when wound on a roll, the productivity is increased, and the product quality is improved.

Abstract: A coating apparatus having an extrusion type coating head to form a coating on the surface of a support by extruding a coating liquid continuously or successively from a slit, wherein the slit is tapered so as to expand or become wider gradually from its inlet end so as to allow the coating liquid to be extruded toward its outlet end and apply the coating liquid onto the surface of the support and wherein an opening slit width (d1) at the inlet end of the slit and an opening slit width (d2) at the outlet end thereof satisfies the following relations:5% .ltoreq.[(d2-d1)/d1].times.100.ltoreq.20%.The arrangement of the slit can form a coating in a uniform film thickness by preventing the occurrence of irregularities or streaks on the surface of the coating or by suppressing a variation in film thickness.

Abstract: In a coating apparatus having an extrusion coating head, the working value H of a back end edge which corresponds to an end portion at the downstream side of a support feeding direction of a back edge of the extrusion coating head is set to 25 .mu.m or less, and the straightness of said back end edge with respect to the coating width is set to 5 .mu.m or less. Accordingly, a coating operation to form coated films at a stable thickness can be stably performed without occurrence of streaks and coating unevenness on the films, and a judgment on coating surface characteristics can be readily performed without actually carrying the coating operation.

Abstract: In an extrusion type coating head according to the present invention, a center line average roughness (Ra) of an inner wall surface of a pocket is made in a predetermined range of 3.5 .mu.m or less and preferably a curvature part is provided, in the part where a surface of a slit joins to a surface of the pocket, which has the radius of curvature R of within a predetermined range. By these configurations, an easiness of cleaning in the pocket of the extrusion type coating head which is difficult to be cleaned is remarkably improved in particular, the rate of operation is improved, labor is saved, and adverse effects are prevented that might be brought by insufficient cleaning on the product coating such as streak generated on the coating surface and thickness fluctuation in the coating.

Abstract: An coating apparatus comprises at least two coating bars along which a support member is conveyed in a running direction, wherein a center line mean roughness (Ra) on the edge at the downstream side of the downstream bar is not larger than 0.5 .mu.m and the maximum height (Rmax) on the edge is not larger than 6.0 .mu.m.

Abstract: Disclosed is a method of producing a magnetic recording medium which comprises a magnetic layer, comprising a step of kneading a magnetic coating solution containing a ferromagnetic powder and a binder for the magnetic layer under a load of substantial electric power consumption of 0.05 to 0.5 KW per Kg of the ferromagnetic powder in a kneader chamber having an atmospheric water content of not more than 1 g/m.sup.3.

Abstract: A magnetic recording medium comprises a non-magnetic base material; a lower magnetic layer containing a magnetic powder for recording in a long wavelength range and a resin binder; an upper magnetic layer containing a magnetic powder for recording in a short wavelength range and a resin binder; and an intermediate layer disposed between the two magnetic layers. By properly selecting the type and amount of resin binder contained in the upper magnetic layer and by disposing the intermediate layer whose main component is a resin binder, dispersion property of the magnetic powder in the upper magnetic layer can highly be improved, and thin and smooth magnetic layers can be obtained. Thus, the recording medium provides excellent reproduction characteristics in the wide wavelength range and has excellent running durability. In particular, the reproduction characteristics in a short wavelength range can be improved.

Abstract: Disclosed is an apparatus for coating by extrusion a coating solution on a surface of a beltlike material continuously running comprising a coater die having a plurality of edges and a slit being provided between said edges, wherein a part of said coater die, which has contact with said beltlike material or said coating solution, is covered with a film having Vickers hardness of not less than HV 1,700 wherein the film is prepared by an ion plating method. The apparatus is capable of achieving a stable coatability.

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: A magnetic recording medium improved in the magnetic recording characteristics, running properties and durability is disclosed. The magnetic recording medium comprises a non-magnetic support having on a side of the support an upper magnetic layer positioned farther from the support and a lower magnetic layer positioned closer to the support. The upper magnetic layer comprises a binder, a magnetic powder having an original BET specific surface area of not less than than 30 m.sup.2 /g and at least one abrasive selected from alumina, silicon carbide, Cr.sub.2 O.sub.3, silica, .alpha.-Fe.sub.2 O.sub.3, TiO.sub.2 and zilconia in a portion of 3 to 20 parts per 100 parts by weight of the magnetic powder, and the lower magnetic layer comprises a binder and a magnetic powder having an original BET specific surface area of less than 30 m.sup.2 /g, and kinds of the binders each contained in the upper magnetic layer and the lower magnetic layer are the same.

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.

Abstract: Disclosed is a coating head for coating a solution on a flexible support which is moved so as to run along a coating surface of the coating head. The coating surface is slitted so as to form a front face, a back face in order in the moving direction of the flexible support, and a slit therebetween so that the coating head extrudes the solution through the slit to the flexible support. The front face has an arc surface with a curvature radius of r.sub.1 and the back face wholly forms an arc surface with a curvature radius of r.sub.2 in the following equations 3 mm <r.sub.2 < 20 mm and 1 mm <r.sub.1 <r.sub.2 /2. Further, at least a part of the back face projects beyond the tangent line at the downstream end of the front face.