Abstract:
A curtain coating method including: discharging at least one coating liquid from a slot type die; forming a coating liquid film of the coating liquid freely falling; and applying the coating liquid film to a support medium continuously running, with both right and left ends of the coating liquid film being held by a pair of edge guides, wherein, during non-coating, a direction in which the coating liquid is discharged from the slot type die is kept in a horizontal direction or tilted from the horizontal direction in a direction distancing from the support medium.
Abstract:
The invention provides a method of applying a mutilayer coating film, in which two or more layers of coating are applied to a flat plate, such as steel plate; and a product with multilayer coating film obtained by the method. The method includes discharging paint films through multiple slits, simultaneously applying these films to a traveling plate to thereby form a multilayer paint film and carrying out drying or baking thereof, characterized in that the boiling point of the solvent contained in the layer close to the plate is equivalent to or lower than the boiling point of solvent contained in the layer remote from the plate, and that the boiling point of solvent contained in the layer closest to the plate is lower than the boiling point of solvent contained in the layer remotest from the plate.
Abstract:
A method for operating a machine for single or double sided application of a liquid or viscous coating medium by way of at least one applicator unit onto the surface of a mating material web, especially a paper or cardboard web is provided. The coating medium collecting unit is cleaned prior to, during or after an application process of the machine, by way of supplying cleaning liquid via the supply line. The valve arrangement can be switched to the second valve condition for clean-up and to the third valve condition for the collection of coating medium in the medium collecting device. The medium collecting unit can be cleaned after start of the application process, during coating, through elements of supplying cleaning liquid via the supply line.
Abstract:
A method for making a composite panel, wherein the composite panel has a honeycomb core sandwiched between a pair of facing sheets, includes the steps of (a) coating the interior walls of the cells with a unexpanded thermo-expandable material; (b) bonding a pair of facing sheets to the opposite sides of the honeycomb core; and (c) heating the honeycomb core while the honeycomb core is sandwiched between the pair of facing sheets with sufficient heat to cause the thermo-expandable material to expand and to substantially fill the cells.
Abstract:
A wide slit nozzle having a slit as a discharge opening. The thickness of a lateral end part is set smaller than the thickness at a lateral center part. The thickness of the lateral center part is fixed. The thickness of the lateral end part changes linearly from opposite lateral ends of the lateral center part to the opposite lateral ends of the slit. Coating material is discharged from the slit while applied with pressure, so that the coating material is coated while expanded wider than the width of the slit. The coating material is discharged at 7 liter per minute, and a coating width of a first example is 100 mm, for example. A thickness increase of the overlapped part is +25% even when a width or an overlapped margin z of the overlapped part is 10 mm or 20 mm.
Abstract:
The invention relates to a process for applying at least two chemically different, flowable media, particularly solutions of polymers, dispersions or combinations thereof as adhesives, coating materials or coatings. By means of a multiple cascade die 1 at least two chemically different, flowable media 30, 32 are applied to web-form substrates 20; 40, 41 continuously in one operation. The total amount within a multilayer application 51 is between 2 g per m2 to 200 g per m2. The ratio of the individual layers 31, 33 within the multilayer application 51 to one another is between 0.1 to 100.
Abstract:
In a method and an apparatus for curtain coating of a moved substrate like a paper web substrate is moved below a liquid supply means providing a single or multilayer liquid coating in the form of a free-falling curtain impinging the substrate at a dynamic wetting line and a blade or air shield located upstream of the dynamic wetting line with respect to the moving direction of the substrate. The dynamic wetting line of the coating curtain on the substrate or web is oriented generally perpendicular to the moving direction of the substrate or web, providing substantially the same air pressure over an essential part of the coating curtain on its front and back side with respect to the moving direction of the substrate and providing a first supply air flow upstream to the wetting line. The supply air flows over a substantial length along the free-falling curtain and evacuates air from a location upstream of the supply air flow so that the air near the dynamic wetting line is moved against the moving direction of the substrate web and the boundary air layer entrained to the substrate. A second supply air is provided in proximity to the wetting line.
Abstract:
A machine for single or double sided application of a liquid or viscous coating medium by way of at least one applicator unit onto the surface of a mating material web, especially a paper or cardboard web. A medium collecting device that is allocated to the applicator unit or to a dispensing component of the applicator unit which includes the dispensing openings, is equipped with a receiving and release component which is allocated to the medium collecting device and which is or can be mounted detachably on same. During the start of the application process the component releases the curtain or veil due to a common adjustment with the medium collecting device or of a section component of same relative to the curtain or veil from a rim extending across the moving background or from an edge extending across the moving background.
Abstract:
The present invention refers to a method of producing a coated substrate comprising the steps of: a) forming a free flowing curtain, the curtain having at least one component capable of reacting, and b) contacting the curtain with a continuous web substrate.
Abstract:
The invention is generally directed to techniques for reducing premature drying of solvent-based coatings, including premature drying at sites on the apparatus that applies the coatings. By introduction of solvent vapor proximate to the coating apparatus, and by passively bringing the solvent vapor to the site, the risk of premature drying is reduced. In the presence of the solvent vapor, solvent in the coating fluid tends not to evaporate quickly. The solvent vapor may be introduced by any of a variety of solvent vapor emission devices, and may be brought to the site passively by, for example, increasing the concentration of solvent vapor in a boundary layer that moves with the substrate being coated, diffusion, or natural convection.