Metering rod coaters

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 25/12 (2006.01) B05C 11/02 (2006.01)

Patent

CA 2217246

A metering rod type coating applicator (10) is provided with a metering rod (26) having its peripheral surfaced texture to a texture in a range of Ra 0.5 µm to Ra 1.6 µm to improve the application of coating to a moving surface e.g. the surface cover (14) of a roll (12) of a size press, and permit uniform coating application using higher solids content coatings and/or lower coat weights. Preferably, the rod (26) will be rotated at a speed significantly higher than that conventionally used and preferably with a peripheral velocity in the range of about 15 to 20 m/min.

L'invention concerne une machine de couchage (10) de type à racle rotative comprenant une racle rotative (26) dont la surface périphérique est structurée en une texture s'échelonnant de Ra 0,5 µm à Ra 1,6 µm afin d'améliorer le couchage sur une surface en déplacement, par exemple, la surface (14) d'un rouleau (12) de presse encolleuse, et pour assurer un couchage homogène en utilisant des revêtements à teneur en solides plus élevée et/ou à poids de couche moins élevés. La rotation de la racle (26) s'exécutera, de préférence, à une vitesse significativement plus élevée que celle utilisée d'habitude, tandis que la vitesse périphérique sera, de préférence, de l'ordre de 15 à 20 m/min.

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