Method of curtain coating

A method of curtain coating, the curtain being formed from at least one layer of coating solution having a composite density rho (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 continuo...

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Bibliographische Detailangaben
1. Verfasser:	CHRISTOPHER LEE BOWER
Format:	Patent
Sprache:	eng
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL AUXILIARY PROCESSES IN PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HOLOGRAPHY PERFORMING OPERATIONS PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TRANSPORTING
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Beschreibung
Zusammenfassung:	A method of curtain coating, the curtain being formed from at least one layer of coating solution having a composite density rho (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 theta 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 sigma (mNm-1), the aforementioned variable parameters being controlled so as to prevent recirculation.