Leaf coater and method for producing leaf type coated substrates

A method for producing leaf type coated substrates, comprising coating substrates one by one with a coating solution by means of a leaf coater to produce coated substrates, wherein the viscosity of the coating solution supplied from a coating solution supply source is not more than 100,000 mPa·s, and the leaf coater comprises a coating solution supply source, a predetermined coating solution quantity intermittent supply means, a coating solution applying means for applying the coating solution to blank substrates, a first coating solution flow pipeline connecting the coating solution source with the intermittent supply means, a second coating solution flow pipeline connecting the intermittent supply means with the applying means, and a coating solution filtration means provided in either the first or second coating solution flow pipeline, which, comprises a housing having an inlet and an outlet of the coating solution and a coating solution filtration means composed of a filter medium provided in the passage of the coating solution in the housing, wherein the Young's modulus of the filter medium in the coating solution filtration means is not less than 200 MPa and the pore size of the filter medium is in the range of 0.05 to 100 μM.