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Slot-die coating is a non-contact coating method, in which the slot-die is typically held over the substrate at a height several times higher than the target wet film thickness. [23] The coating fluid transfers from the slot-die to the substrate via a fluid bridge that spans the air gap between the slot-die lips and substrate surface.
Slot Die coating - Slot die coating was originally developed in the 1950s. [76] Slot die coating has a low operational cost and is an easily scaled processing technique for depositing thin and uniform films rapidly, while minimizing material waste. [77]
The actual process of extrusion coating involves extruding resin from a slot die at temperatures up to 320°C directly onto the moving web which may then passed through a nip consisting of a rubber covered pressure roller and a chrome plated cooling roll. The latter cools the molten film back into the solid state and also imparts the desired ...
A typical industrial roll-to-roll process line. In the field of electronic devices, roll-to-roll processing, also known as web processing, [1] reel-to-reel processing or R2R, [2] is the process of creating electronic devices on a roll of flexible plastic, metal foil, or flexible glass. [3]
Pages in category "Coatings" The following 103 pages are in this category, out of 103 total. ... Slot-die coating; Solution precursor plasma spray; Sputtering;
Hot melt coating is the application of a layer to a substrate by pre-melting the desired material and then allowing or forcing the material to cool, solidifying the layer. The process is widely used in industry, including pressure-sensitive adhesives , [ 1 ] labels, pharmaceuticals, [ 2 ] etc.
Typical converting processes include coating, laminating and printing. Coating technologies can include hot melt coating, gravure coating, curtain coating and slot-die coating. The most common printing techniques are flexo printing and rotogravure (gravure) printing. Both print processes are suited to high speed roll-to-roll processing.
Products that have been manufactured on reverse roll coating machines include magnetic tapes; coated papers; and pressure sensitive tapes. [2] The rise of slot-die coating has tended to eclipse reverse roll coaters as in most if not all cases, the same products can be made on cheaper machinery.