Extrusion coating method and coating apparatus with swirl and th

Details Extrusion coating method and coating apparatus with swirl and th Extrusion coating method and coating apparatus with swirl and th

1998-01-05

1999-08-10

Bareford, Katherine A.

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

118410, B05D 312, B05C 318

Patent

active

059356545

ABSTRACT:
A coating method and coating apparatus capable of providing a coated film of improved surface properties free from any streak and color shading and facilitating coating on a sheet of an increased width without causing enlargement of the apparatus and thus complicating its structure. A swirling motion imparting mechanism and an orifice are arranged at a connection between a liquid feed pipe and a coater. Swirling motion is imparted to coating liquid discharged from a pump and then a flow velocity of the coating liquid is immediately increased to a level as high as 200 cm/s or more, the liquid then being fed into a pocket of the coater within 0.1 second or less. This permits shearing to act on the coating liquid, to thereby effectively prevent a variation in viscosity of the coating liquid and flocculation thereof, so that the coated film may be improved in surface properties.

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