Solid content, coating colors

Coating Method Coating Color solid content (%) Coating Speed (m/min) Coat Weight Remarks... 

The quantity of coating applied by a blade coater is determined by the roughness of the paper surface, the solids content and viscosity of the coating color, the speed of the coating operation, the geometry of the system, blade mechanical characteristics and the pressure applied at the blade.225,226 Calendering prior to coating application... 

Perez-Gago, M.B., Serra, M., Alonso, M., Mateos, M., del Rfo, M.A. Effect of solid content and lipid content of whey protein isolate-beeswax edible coatings on color change of fresh-cut apples. J. Food Sci. 68(7), 2186-2191 (2003)... 

Soybean protein is a very important binder type, especially in North America. It has properties very similar to those of casein. Isolated soybean proteins are hydrolyzed, isoelectric proteins. They are used in the form of alpha and delta proteins with four different viscosities (extra low, low, medium, and high). The viscosity refers to the dissolved soybean protein, the solvent of choice being aqueous ammonia (26 Be). Proteins dissolved in this way exhibit very low sensitivity to water after drying. like casein, soybean protein is mostly used as a mixture with polymer dispersions. This combination permits the preparation of coating colors with high sohds content and a relatively low viscosity. Solids contents ofca. 60%, suitable for blade coaters, can be achieved. 

The solids content greatly influences the runnability of the coating color in the coating machine. The solids content basically influences the viscosity of the color and its flow behavior at varying shear stresses in the coating machine. 

Table 7.3 Coat weights and solid contents of coating colors for different coating methods.

Coating colors with a high solid content can be prepared... 

Does not affect coating color viscosity, high levels of solid content possible Freeze-sensitive... 

---