| 摘要 |
#CMT# #/CMT# The multi-layered curtain coating apparatus useful in a paper machine, comprises a unit for displacing a band support (6) from 1-3 m through a coating zone, a coating head having two outflow slits (2c, 3c), an obstruction unit for blocking the outflow slits on its side edges, a unit for adjusting the speed of the displacement unit, a unit for varying the flow of coating compositions (2, 3), and a unit for varying the distance of the coating head. The slit has a width of 5 cm before the obstruction. The coating head has an inclined plane and an inversed inclined plane. #CMT# : #/CMT# The multi-layered curtain coating apparatus useful in a paper machine, comprises a unit for displacing a band support (6) from 1-3 m through a coating zone, a coating head having two outflow slits (2c, 3c), an obstruction unit for blocking the outflow slits on its side edges, a unit for adjusting the speed of the displacement unit, a unit for varying the flow of coating compositions (2, 3), and a unit for varying the distance of the coating head. The slit has a width of 5 cm before the obstruction. The coating head has an inclined plane and an inversed inclined plane. The obstruction unit is an adhesive, a hardening paste, a solid joint and a plastic or rubber plate. Independent claims are included for: (1) a paper machine; (2) a process for coating a multi-layered curtain; and (3) a process for fabricating a product. #CMT#USE : #/CMT# The multi-layered curtain coating apparatus is useful in a paper machine and for fabricating a printing paper, a synthetic paper and a decorative paper (claimed). #CMT#ADVANTAGE : #/CMT# The apparatus can be applied on many layers with different compositions and with same coating head thus reducing the risk of installations and the cost, provides a uniform coating of the curtain at high speeds, and avoids the repositioning and/or of particular adjustment of side edges of the obstruction unit. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a cross-sectional view of the coating head. 2, 3 : Coating compositions 2a, 3a : Pipe 2b, 3b : Central cavity 2c, 3c : Flow slits 6 : Band support. |
