Patent ID: 6214114
Filing Date: 2001-04-10
Classification: B05C,B05D

Abstract:
A coating apparatus comprising:(a) a conveyor which conveys an object to be coated; and(b) a coater including a slit having a slit inlet through which a coating liquid is injected and a slit exit through which the coating liquid is jetted, whereby the coating liquid jetted through the slit exit becomes a film shape between the slit exit and the object, the coating liquid colliding with the object at a collision speed V (m/s),wherein the coater is in non-contact with the coating liquid coated on the object to be coated,the collision speed satisfies a relation of V (m/s)=U.multidot.hw/d, and a clearance of a slit exit d (m) of the coater satisfies a relation of 0<d.ltoreq.5.times.10.sup.-5 (m) and d<(.rho..multidot.U.multidot.hw.sup.2)/(0.2.mu.),where .mu.(PA.multidot.s) is a viscosity of the coating liquid, .rho. (kg/m3) is a density of the coating liquid, U (m/s) is a coating speed and hw (m) is a coated laver wet thickness,and wherein the clearance of the slit exit of the coater is smaller than a clearance of the slit inlet, the slit has, on a side of the slit exit, slit side surfaces which face each other and which are in parallel.