Method and apparatus for coating paper board and paper

Details Method and apparatus for coating paper board and paper Method and apparatus for coating paper board and paper

B - Operations, Transporting

05

D

B05D 3/12 (2006.01) B05C 11/04 (2006.01) D21H 23/32 (2006.01) D21H 25/08 (2006.01)

Patent

CA 2288113

A method and apparatus for coating a paper or a paper board web (5), comprising spreading coating mix having a solids content of 55 to 75 % on the surface of the web (5) with a nozzle applicator (3, 9), levelling and metering the spread coating mix on the surface of the web by a doctor element (7) capable of producing a high hydrodynamic force on the contacting layer between the doctor element (7) and the web (5), the doctor element (7) being located downstream of the applicator (3, 9) so that the dwell time between the spreading of the coating mix to the metering is 72-2400 ms. The web speed is preferably 100-1000 m/s. A good smoothness and coverage is achieved by this method due to long dwell time.

Cette invention se rapporte à un procédé et à un appareil de couchage d'une bande (5) de papier ou de carton, qui consiste à étaler à la surface de la bande (5) une sauce de couchage comportant une teneur en éléments solides comprise entre 55 et 75 %, au moyen d'un applicateur à tuyère (3, 9), à araser et à doser la sauce de couchage étalée à la surface de la bande au moyen d'une racle (7) susceptible de produire une force hydrodynamique élevée sur la couche de contact entre la racle (7) et la bande (5), ladite racle (7) étant disposée en aval de l'applicateur (3, 9) de sorte que la durée de séjour écoulée entre l'étalement de la sauce de couchage et le dosage est comprise entre 72 et 2400 ms. La vitesse de la bande est de préférence comprise entre 100 et 1000 m/s. Ce procédé permet d'obtenir un bon lissé du papier et un bon rendement superficiel spécifique en raison de l'importance de la durée de séjour.

Affiliated with

Also associated with

Rating

Method and apparatus for coating paper board and paper does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for coating paper board and paper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for coating paper board and paper will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1568076