Abstract: An enhanced ceramic layer is produced for use in laminated ceramic devices. A layer of unfired ceramic material is provided and a coating of dielectric material (preferably alumina) is applied on at least one surface. The dielectric material forms a reaction barrier between excess glass forced to the surface during firing and metallization positioned on the coating. The coating can be applied by screen printing, spraying a slurry of dielectric material, or spraying a slurry of dielectric material and an adhesive allowing low pressure lamination.

Abstract: A curtain coating apparatus for applying a coating solution to a continuously moving web, which comprises an air jet injector for injecting air in the upstream direction of a web, provided at a position upstream of a contact point of a curtain film with the web and a shielding member shutting off entrained air generated by movement of the web, provided between the contact point and the air jet injector, thereby diminating an influence of turbulent air flow and preventing the curtain film from suction toward the air jet injector, or which further comprises a control member connected to the shielding member, the control member being provided at a position near and in parallel to the web, or which further comprises a control member and a partition wall member, both being integrated with the shielding member to form a closed space, the air jet injector and an air suction means being provided in the closed space, thereby making the closed space a subatmospheric pressure zone, can produce coated products of good qu

Abstract: A coating method and apparatus are taught for coating a liquid composition onto a surface of a moving web. A coating hopper for delivering the liquid composition to the surface of the moving web is provided with a rotatable backing roller. The moving web is wrapped around a portion of the rotatable backing roller with the rotatable backing roller supporting the moving web through a dynamic wetting line. The rotatable backing roller includes a plurality of circumferential grooves therein at a groove pitch of at least two per millimeter. An electrostatic field generated across the gap between the moving web and the liquid composition immediately prior to the dynamic wetting line. The method and apparatus permit either coating at a higher speed or higher viscosity than may be achieved in the prior art, or greatly reduced groove line nonuniformity at a given coating speed and viscosity.

Abstract: The invention relates to a method and device for improving the coating surface of a coating mass deposited on or applied to a paper web (8, 23) by a film press. An anionic aqueous coating mass or an anionic paper web are provided with an opposite electric charge by an electric charger, whereby the applied coating is attracted to the oppositely charged paper (8, 23) in a nip exit area of the film press. The electric charger is, for example, a corona generator (13, 17) or a direct current voltage source (9) that is connected to the paper (8, 23) and coating slip by electrodes (5, 5a, 7, 7a).

Abstract: In a method of coating substrates, especially printed circuit boards, on both sides, one side of the substrate, which is provided with holes, is coated by a coating process, especially by screen printing, wherein the holes that are not required for the circuit layout are lastingly covered over and the holes that are required are covered over only slightly or are left clear, whereupon the other side of the substrate is coated by a coating process, especially by curtain pouring or spraying, wherein the entire surface of the substrate is provided uniformly with a coating that gives only a light covering over the holes.

Abstract: A method is taught for curtain coating a liquid composition onto a moving web at a coating point where the moving web is supported on a backing roller. The web is partially wrapped around the backing roller, the backing roller including a relief patterned area on the surface thereof, the relief patterned area including relieved features and non-relieved features, the relieved features and the non-relieved features creating an electrostatic force difference exerted on the liquid composition at the coating point when an electrostatic field is applied thereto. A web speed is specified and the electrostatic force difference exerted on the liquid composition at the coating point is varied to determine a maximum electrostatic force difference for the specified web speed that achieves the predetermined acceptable level of coating thickness non-uniformity.

Abstract: A slit nozzle is positioned above a surface of a substrate placed in a rotary coater, and, while the slit nozzle is translated parallel to the surface of the substrate a coating solution is ejected from the slit nozzle toward the glass substrate under conditions such that the effects of surface tension of the solution are minimized or substantially cancelled out, to uniformly coat the coating solution on substantially the entire surface of the substrate with minimum wasting of the solution.

Abstract: A method of bead coating a liquid composition onto the surface of a moving web is taught which provides uniform coatings over a wider range of operating parameters including new coating windows. In addition, the bead coating method typically demonstrates a reduction in coating sensitivity to vacuum pressure noise below the coating bead.

Abstract: Using a scan coating method, a liquid film is formed on a substrate having a temperature distribution for correcting a temperature distribution of a liquid film caused by the heat of evaporation due to the volatilization of a solvent contained in the liquid film, and then the solvent is removed from the liquid film to form a coating film.

Abstract: Disclosed is a method of producing, with good productivity, information recording materials such as a thermal recording material and an inkjet recording material excellent in coating properties and excellent in various properties. The method comprises forming a coating composition film made of a plurality of coating color layers on a substrate by curtain coating and drying the coating composition film to form part or all of layers for forming an information recording material, and either (1) adjusting the viscosity of each of the coating colors for a plurality of the coating color layers to at least 100 mPa·s and controlling the surface tension of the coating color for a lowermost layer to 18 to 45 mN/m, or (2) controlling the density of the coating color for a layer to be positioned above not to exceed 140% of the density of the coating color for an adjacent layer to be positioned below. The present invention has been completed on the basis of the above findings.

Abstract: Extrusion coating of circular and other substrates is taught with a linear extrusion head in a linear motion utilizing a chuck assembly providing a coating bead forming surface. The coating bead forming surface allows for the coating bead to be at a steady state at all points at which the extrusion head interfaces with the substrate during the linear motion. Various configurations of chuck assemblies are taught to allow for improved handling of the substrate, deploying of the chucks in existing machinery, and simplified cleaning of the coating bead forming surface. Additionally, adaptation of the chuck assembly for discouraging undesired migration of the coating material is taught.

Abstract: A method is provided for coating one or more fluid layers on a substrate to form magnetic recording media such as magnetic tape and diskettes. The method takes advantage of fluid coating formulations having a particular rheology that enables the coating of one or more magnetic layers with reduced thicknesses while achieving increased coating speeds. With proper rheology, one or more layers can be coated on a substrate traveling at increased speeds while maintaining desired coating thicknesses.

Abstract: The invention provides a device and method for dispensing fluid materials from a product reservoir onto a substrate. The device includes at least one dispensing nozzle having at least one inner conduit leading to an exit port and adaptable to be in fluid communication with a supply source for the fluid dispensable material. The nozzle further comprises an end portion defining the exit port such that a ribbon of fluid dispensable material can be applied to the substrate. The nozzle is mountable on means that effect substantially perpendicular free movement of the nozzle relative to the substrate, such that the end portion of the nozzle maintains contact with the fluid material applied to the substrate. During dispensing, movement towards the substrate is effected by an applied force and movement away from the substrate is effected by a thrust exerted by the dispensed fluid material against said end portion of the nozzle and the dispensable material in the exit port.

Abstract: The method of making a tubular member having a continuous and uninterrupted cured elastomeric resin coating on an outer surface of the member includes forming a continuous uninterrupted tubular layer of uncured elastomeric resin and drawing the resin layer against the surface of the tubular member to be coated by applying suction between the resin layer and the surface of the tubular member so that the resin adheres to the surface of the tubular member. The elastomeric resin may then be continuously heated and cured to produce the final product. Apparatus for carrying out the process is disclosed and includes, in sequence, a coating zone including a sub-atmospheric chamber, a heating zone and a feed mechanism for advancing the tubular member relative to the coating and heating zones.

Abstract: In a simultaneous coating of multiple layers on a web using a slide hopper type coating apparatus, the gelatin concentration of the coating liquid for the bottom layer is set to be lower than the gelatin concentration of the coating liquid for the middle layer by at least 2 points in percentage, the ratio A/B, which is the flow amount ratio of the coating liquid for the bottom layer with respect to the entire multi-layered coating liquid, is set to be between 0.05 and 0.2, and the ratio C/D, which is the viscosity ratio between the coating liquid for the bottom layer and the coating liquid of the middle layer, is set to be between 0.2 and 0.67. Thereby, the flow of the multi-layered coating liquid flowing down on the slide surface can be stabilized.

Abstract: In a case to coat a web by using coating heads which have plural slits, the coating method coats the web by adjusting a running speed, an average high shear viscosity, and a surface tension of the coating liquid of the top layer so that the capillary number Ca, which is calculated by an equation Ca=U&mgr;/&sgr;, satisfies an inequality 0.1<Ca<4, where U (m/s) is a running speed of the web, &mgr; (Pa·s) is an average high shear viscosity of the coating liquids, and &sgr; (N/m) is a surface tension of the coating liquid for the top layer.

Abstract: A coating method and apparatus are taught for coating a liquid composition onto a surface of a moving web. A coating hopper for delivering the liquid composition to the surface of the moving web is provided with a rotatable backing roller. The moving web is wrapped around a portion of the rotatable backing roller with the rotatable backing roller supporting the moving web through a dynamic wetting line. The rotatable backing roller includes a plurality of circumferential grooves therein at a groove pitch of at least two per millimeter. An electrostatic field generated across the gap between the moving web and the liquid composition immediately prior to the dynamic wetting line. The method and apparatus permit either coating at a higher speed or higher viscosity than may be achieved in the prior art, or greatly reduced groove line nonuniformity at a given coating speed and viscosity.

Abstract: A method for applying a fluid coating onto a substrate includes forming a fluid wetting line by introducing a stream of fluid onto a first side of the substrate along a laterally disposed fluid-substrate contact area. An electrical force is created on the fluid from an electrical field (originating from electrical charges which are on the second side of the substrate) that is substantially at and downstream of the fluid wetting line. The electrical field can be generated by charges that have been transferred to the second side of the substrate from a remote charge generator.

Abstract: In curtain coating for multiple layers consisting of lower most layer, uppermost layer and intermediate layer, using coating liquid having viscosity more than 300 mPas for one layer or more of multiple layers improves amazingly the curtain coating stability against disturbance such as passing spliced portion of running web. The one layer or more layers for which coating liquid having viscosity more than 300 mPas is to be used is selected from intermediate layer. The curtain coating stability is further improved by combining the high viscosity coating liquid for intermediate layer with other technologies such as electrifying web, heating web upstream of coating point and/or keeping web tension higher than some specified value.

Abstract: A method of curtain coating, the curtain being formed from at least one layer of coating solution having a composite density &rgr; (kgm−3) and a total volumetric flow rate per unit curtain width Q (m2s−1), the curtain being allowed to free fall a distance h (m), at a velocity U (ms−1), onto a continuously moving substrate having a velocity S (ms−1) with an application angle of &thgr; between the horizontal and tangent to the substrate at the point of impingement, the dynamic surface tension at the rear of the falling curtain being &sgr; (mNm−1), the aforementioned variable parameters being controlled so as to prevent recirculation.

Abstract: A web is coated by passing it in a horizontal web travel direction beneath a slot nozzle extending transversely of the direction. A pigment-carrying liquid is ejected at a flow speed from a slot of the nozzle to form a downwardly free-falling curtain extending across the web. A vertical inner face of a guide element is oriented at each outer edge of the curtain with each face extending from a respective end of the slot downward to adjacent the passing web. An upper region of each of the inner faces is fed is to a respective partial stream of the liquid such that the partial streams flow down the respective inner faces at a speed at least equal to the curtain flow speed and merge with the outer edges of the curtain.

Abstract: A method for reducing coating defects caused by strikethrough when simultaneously slide coating a first fluid layer, a second fluid layer, and a third fluid layer. The method includes preparing the first, second, and third fluids such that the first solute is incompatible with the second and third solutes and such that the first fluid minimizes strikethrough of at least one of the second and third fluids to a slide surface when the first fluid is positioned between the slide surface and the second and third fluids. The present invention is useful in preparing imaging, data storage, and other media.

Abstract: A method for reducing coating defects caused by strikethrough when simultaneously slide coating a first fluid layer, a second fluid layer, and a third fluid layer. The method includes preparing the first, second, and third fluids such that the first solute is incompatible with the second and third solutes and such that the first fluid minimizes strikethrough of at least one of the second and third fluids to a slide surface when the first fluid is positioned between the slide surface and the second and third fluids. The present invention is useful in preparing imaging, data storage, and other media.

Abstract: The invention relates to a method of applying a multi-component glue mixture to objects passing through an applicator station for the application of said glue mixture in a manufacturing line. Waste glue mixture is produced during the application of said glue. The method comprises mixing glue components in a mixer to form said glue mixture. The waste glue mixture is collected in a tank, where it is mixed with a fresh glue component to form a mixture. The mixture of waste glue mixture and fresh component is returned to said mixer. A multi-component glue applicator machine (3) according to the invention comprises storage tanks (4, 6) for glue component, day tanks (17, 18) for said glue components, and mixing apparatus (38, 40, 42) for mixing glue components from said day tanks (17, 18) to form a glue mixture thereof. There is provided a glue applicator device (44). One of said day tanks (17) is provided beneath the glue applicator (44).

Abstract: A coating apparatus and coating method include a device for conveying an object to be coated; a coating device which is disposed in a vicinity of a conveyed surface of the object, and which discharges a coating liquid, and which forms a bridge of the liquid between the device and the object which is conveyed by the device for conveying an object to be coated, and which coats the liquid on at least one surface of the object; and a gas stream blowing device which, immediately after starting of coating, blows out a gas from a direction substantially opposite to a object conveying direction, toward a portion of the object where coating starts.

Abstract: The curtain coating apparatus of the invention comprises a sliding face on which a coating solution flows down, a coating width regulating plate which is located on each of both sides of the sliding face and regulates the width of the flow of the coating solution, and an edge guide which is connected to the width regulating plate, and keeps both side edges of free falling stream of the coating solution from the sliding face, wherein a contact angle of water with the coating width regulating plate is greater than a contact angle of water with the edge guide, and the apparatus has solved problems of streaks and uneven thickness at side end portions of a free falling film caused by contraction and teapot phenomenon (residence), by changing wett properties at a coating width regulating plate and an edge guide.

Abstract: A method of reducing the tendency toward formation of coating non-uniformities in the coating of multilayer photographic elements is disclosed. More particularly, the present invention involves the coating of a non-gelatin coating over a topmost gelatin layer in a photographic element. In one embodiment, a processing-solution-permeable overcoat is simultaneously coated with the emulsion layers onto a photographic substrate, which overcoat becomes water and stain resistant in the photochemically processed product. In the latter embodiment, the overcoat formulation comprises at least one water-dispersible hydrophobic polymer interspersed with a water-soluble polymer.

Abstract: Packaging laminate for packages for liquid foods having excellent liquid and oxygen gas barrier properties in which all included layers are biodegradable. The packaging laminate includes at least one liquidtight layer (11, 13) of homo or copolymers of monomers selected from a group consisting of lactic acid, glycol acid, lactide, glycolide, hydroxy butyric acid, hydroxy valeric acid, hydroxy caproic acid, valerolactone, butyrolactone and caprolactone, as well as an oxygen gas barrier layer (12) of ethylene vinyl alcohol, polyvinyl alcohol, starch or starch derivatives. The oxygen gas barrier layer is preferably applied by a dispersion coating process. The layers may be laminated directly to one another or indirectly by means of interjacent adhesive layers. The packaging laminate may also include a core layer of, for example, paper or paperboard, or a biopolymer. The invention also realises a method of producing the biodegradable packaging laminate according to the invention.

Abstract: An apparatus for forming a graduated coating on a substrate includes a coating station positioned along a conveyor. The coating station includes a first coating dispenser pivotally mounted on a first support and at least one exhaust hood. The first coating dispenser is positioned such that an axis through the delivery end of the first coating dispenser subtends the substrate at a predetermined angle. A method for forming a graduated fade zone on a substrate surface includes positioning a coating dispenser adjacent one side of the substrate, angling the coating dispenser toward the other side of the substrate and supplying a coating material to the coating dispenser such that the coating material is deposited onto the substrate to form a graded fade zone on the substrate.

Abstract: The invention relates to ink jet printing and a process for ink jet printing wherein a coating is formed on an ink receiving layer containing a plastic pigment. The coating is fused into a durable coating which is water-resistant, has some lightfastness, is scratch resistant and can be used in indoor and outdoor environments.

Abstract: A method is taught for preparing a coating hopper prior to initiation of coating a liquid coating composition at a predetermined coating flow rate onto a moving substrate wherein the coating hopper includes at least one internal flow path therethrough. The internal flow path(s) of the coating hopper are drained. The liquid coating composition is introduced into internal flow path(s) at a purge flow rate which may be determined empirically. The internal flow path(s) are filled with the liquid coating composition and with the liquid coating composition then discharging from the internal flow path(s) onto a slide surface of the coating hopper, the liquid coating composition flowing down the slide surface and over a lip of the coating hopper at the purge rate to a drain. The flow of the liquid coating composition through the internal flow path(s) is maintained at the purge rate until air within the internal flow path(s) has been displaced from the coating hopper.

Abstract: This invention relates to a low-density polyethylene composition useful for coating polar substrates. This invention particularly relates to a low-density polyethylene composition useful for coating metal foils, wherein the composition comprises an ethylene/(meth)acrylic acid copolymer having a low acid content.

Abstract: In the case where multiple slide hopper is used for simultaneous multilayer bead coating of photosensitive material, streak defect is occasionally cause, particularly in the case of coating photothermographic material, especially when the outermost layer includes materials capable of increasing optical density such as toner it more frequently happens. It is found that streak defect is restrained when meniscus curvature of upper side bead becomes less than 7.2 mm−1. This condition can be kept by selecting a proper value of clearance between the web surface and the lip of the slide hopper, that is from 0.10 mm to 0.40 mm, and a proper value of pressure in a lower side of the bead, that is from −100 Pa to −700 Pa.

Abstract: A device for application of a gluing system of at least two components, such as a resin component and a hardener component comprising a unit of at least two hollow members, at least one member for each component, provided with a number of orifices in each member designed to apply the respective component onto a substrate below the hollow members to form strands, the hollow members being positioned above the plane of application, wherein the unit comprises means for adjusting the position of the orifices in at least one of the hollow members in relation to the position of the orifices in the other hollow members. The invention also relates to a method for applying a gluing system of at least two components, such as a resin component and a hardener component, in the form of strands, using the device.

Abstract: The present invention relates to a process and an apparatus for detecting a fault in a flowing liquid sheet and in particular in a coating curtain. The process comprises the following steps: transmitting an electromagnetic beam to the sheet so as to irradiate approximately the entire width of the sheet in a direction approximately transverse to the sheet; recovering a beam reflected by the sheet by way of a collector; defining a reference position of the reflected beam on the collector; and noting the deviations of the reflected beam in relation to the previously defined reference position.

Abstract: The coater apparatus enclosure encloses the entire die of a coating apparatus includes an enclosure structure, a saturation station which saturates a supply gas with solvent, a device which supplies solvent-saturated gas to the enclosure to continuously purge the enclosure, and a device which controls the gas flow to the enclosure. The saturation station could include a heated jacketed vessel and a porous metal bubbler, or it could include a series of heat exchangers. No streaks can form due to coating fluid drying on the die lip because the gas supplied to the die enclosure is saturated with the solvent.

Abstract: The present invention is directed to a mineral-based coating composition that can be used on a wide range of substrate surfaces. The composition is comprised of a mineral extender, such as a delaminated hydrated aluminum silicate based clays, having an aspect ratio of about 11 to 1, water, a homopolymer polyvinyl acetate emulsion, a co-polymer polyvinyl acetate emulsion, an acrylic emulsion binder containing a metal dioxide and a buffering agent, a surfactant and a defloculant. Also provided is a method of preparing the mineral-based coating composition. The mineral-based coating composition may be applied to various substrate surfaces to form artistic medium surfaces. The present invention also provides a method of making an artistic medium surface using the composition of the present invention.

Abstract: A system for applying a fluid coating onto a substrate includes forming a fluid wetting line by introducing a stream of fluid onto a first side of the substrate along a laterally disposed fluid-web contact area. An electrical force is created on the fluid from an effective electrical field originating from a location on the second side of the substrate and at a location substantially at and downstream of the fluid contact area. The electrical field can be generated in a highly effective manner relative to the coating fluid by a sharply defined electrode on the second side of the substrate. Ultrasonics combined with electrostatic fields further enhances coating process conditions and coating uniformity.

Abstract: A method of bead coating a liquid composition onto the surface of a moving web is taught which provides uniform coatings over a wider range of operating parameters including new coating windows. In addition, the bead coating method typically demonstrates a reduction in coating sensitivity to vacuum pressure noise below the coating bead.

Abstract: A liquid film forming method of dropping a liquid from a dropping nozzle or dropping nozzles of a dropping unit onto a substrate to be processed, and then providing relative movement between the dropping unit and the substrate while keeping the liquid dropping on the substrate, so as to form a liquid film on the substrate.

Abstract: In this tape (15), the fibers are discontinuous and have a length distribution such that the mean fiber length, that is to say the mean length of 50% of the fibers in a specimen, is between approximately 40 and 70% of the length of the longest fiber in the specimen, the fibers being combined by means of a resin (10) or of an adhesive having a fugitive nature. Application to the production of components made of composites.

Abstract: A method of applying a protective coating to a touch screen panel. A coating material which cures at an elevated temperature is applied to a touch screen panel on at least one surface thereof. The panel is then heated to a temperature which does not adversely affect the panel by irradiating the panel imparting energy to the coating material to more fully cure the coating material in a shorter time period without damaging the panel.

Abstract: Apparatus and method for depositing controlled short intervals of electrostatic charge on a moving web substrate to be coated, including a mathematical model that estimates the charging performance of the apparatus. The model is constructed via benchtop characterization of the apparatus. The model is implemented in coating production via an algorithm comprising a best-fit equation representing the model predictions over a range of relevant input parameter values such as web speed, web capacitance, and desired web voltage. The apparatus includes an electrical charging apparatus, a power supply for powering the charging apparatus, and a controller programmed with the algorithm for automatically setting and controlling the intensity and duration of the output of the power supply to yield the optimal electrostatic potential on the charging apparatus. In operation, run-specific variables including web type and coating speed are also provided as inputs to the controller.

Abstract: A system for applying a fluid coating onto a substrate includes forming a fluid wetting line by introducing a stream of fluid onto a first side of the substrate along a laterally disposed fluid-substrate contact area. An electrical force is created on the fluid from an electrical field (originating from electrical charges which are on the second side of the substrate) that is substantially at and downstream of the fluid wetting line. The electrical field can be generated by charges that have been transferred to the second side of the substrate from a remote charge generator.

Abstract: The coating apparatus has an air shielding device to prevent a curtain of coating liquids, which free-falls from a coating head, from being disturbed by an air carried along by a traveling web. The coating apparatus also has a device to move the air shielding device. Before and at the start of coating, the air shielding device is kept far from an impingement position where the free-falling curtain impinges onto the web. Just after the start of coating, the air shielding device is moved close to the impingement position. This prevents the air shielding device from being contaminated with splashes of the coating liquids, and the like.

Abstract: A device for providing a coating on a surface includes a capillary slot that is open at the bottom and is filled via a supply chamber with coating medium. A substrate is conducted below the opening of the slot with the surface to be coated facing up. The capillary slot is not only determined by the intermolecular binding forces but can be actively fixed. As a result, high coating rates, e.g., between 30 and 100 mm/s, can be achieved. An especially reliable filling of the coating chamber results by providing an overflow container that communicates via a gravity-feed line with the capillary slot. The overflow container is preferably mounted so that it can be adjusted in height above the capillary slot, thereby effecting an adjustable flow of medium through the capillary slot, and an adjustable coat thickness.

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 system for applying a fluid coating onto a substrate includes forming a fluid wetting line by introducing a stream of fluid onto a first side of the substrate along a laterally disposed fluid-web contact area. An electrical force is created on the fluid from an effective electrical field originating from a location on the second side of the substrate and at a location substantially at and downstream of the fluid contact area. The electrical field can be generated in a highly effective manner relative to the coating fluid by a sharply defined electrode on the second side of the substrate. Ultrasonics combined with electrostatic fields further enhances coating process conditions and coating uniformity.

Abstract: The present invention is to provide a recycle system of aqueous paint, wherein material balance is kept by controlling liquid amount within the recycle system when spray-coating.

Abstract: Each coating liquid is supplied from a first end of each manifold to a second end of the manifold, and pressure loss of each coating liquid flowing through each supply slot becomes smaller from the first end to the second end so as to cancel the pressure loss of the coating liquid flowing through the manifold. Each supply slot becomes shorter from the first end to the second end. This makes the liquid amount uniform along the width of the supply slot (coating width), and thus the layers can be well formed without defects.