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A schematic of a typical slot-die coating system. Slot-die coating equipment is available in a variety of configurations and form factors. However, the vast majority of slot-die processes are driven by a similar set of common core components. These include: A fluid reservoir to store the main supply of coating fluid for the system
A crucial issue for a roll-to-roll thin-film cell production system is the deposition rate of the microcrystalline layer, and this can be tackled using four approaches: [5] very high frequency plasma-enhanced chemical vapour deposition (VHF-PECVD) microwave -PECVD; hot wire chemical vapour deposition (hot-wire CVD)
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]
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.
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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.
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