Coating method
AssigneeFuji Photo Film Co., Ltd.
InventorsToshihiro Mandai, Mikio Tomaru, Norio Shibata
Life of this patent
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Abstract
By optimizing the pressure condition for sucking up an excess of coating liquid with a recovering slit, a coating layer on a web with a very small and even thickness can be obtained. In a coating method using two slits of a coating slit and the recovering slit, a liquid pressure P (MPa) at a suction port of the recovering slit is adjusted in a range of 0.05>P≧0. Thus, coating thickness variations in the web width direction of the coating layer formed on the web can be restrained, and score-like coating omission can be prevented from occurring on the coating layer surface.
Claims6
A coating method in which in a state where a continuously running web is brought close to a lip surface at a tip of a coating head, a coating liquid sent into the coating head in excess of a desired amount is discharged through a coating slit and is applied to the web, and an excess of coating liquid applied to excess is sucked up through a recovering slit provided on a downstream side of the coating slit in a running direction of the web, wherein:
- a liquid pressure P (MPa) at a suction port of the recovering slit is adjusted in a range of 0.05>P≧0.
A coating method in which in a state where a continuously running web is brought close to a lip surface at a tip of a coating head, a coating liquid sent into the coating head in excess of a desired amount is discharged through a coating slit and is applied to the web, and an excess of coating liquid applied to excess is sucked up by a suction pump through a recovering slit provided on a downstream side of the coating slit in a running direction of the web, wherein:
- a pressure PIN (MPa) on a suction opening side of the suction pump is adjusted as PIN≧−0.02.
Dependencies are inferred from the claim text.