Process for producing coating film, antireflection film and process for producing the same, sheet polarizer using the film, and image display device using these

摘要

The present invention provides a process for producing an antireflection film comprising applying, using a slot die, a coating solution onto a web which is backed up by a back-up roller and runs continuously to form at least one layer which has a thickness of 200 nm or less in a dried state and has a refractive index lower than that of the web. The slot die has an edge lip downstream of the running web which has a land length along the running web is 30 to 100 mum, and the space between the edge lip of the slot die upstream of the running web and the surface of the web is set to be 30 to 120 mum larger than the space between the edge lip of the slot die downstream of the running web and the surface of the web.