Doctor-blade application method

Two methods are applicable for preparing 2 thin films One is the doctor blade method and the other is the screen-printing method. 

Roller Coaters and Sheet Coaters. These arc often used in coil coating where very large, flat surface areas need to be painted quickly. In these methods, the objects to be painted are passed between a doctor blade and applicator rolls. These methods arc suitable only for coatings that arc to be baked. 

The Fantesk composite powders were reconstituted into dry-film lubricants by redispersing them in aqueous sucrose solutions. Sucrose was obtained from Fleming Companies, Inc. (Oklahoma City, OK) or purchased from a local supermarket (Domino, Extra Fine Granulated 100% Pure Cane Sugar, Domino Foods Inc., Yonkers, NY). Sucrose regulates the drying of the films on the metal and also improves the adhesion of the composite film to the metal surface. It was demonstrated that the concentration of suCTOse had only a very minor effect on COF [35]. The dry-film-lubricant formulations were then applied onto precleaned stainless steel fiat sheets using doctor-blade or spray application methods as described below. 

Solvent cements are usually supplied at concentrations of 10-25% solids, with viscosities in the range of 1,000-30,000 cPs. They may be applied by brush, spray, doctor blade, reverse-roll coater, hand roller, trowel, and many other application methods. The proper coating of the adhesive is obtained by establishing the correct viscosity for the particular application method. After application, the solvent is removed by ambient drying or by forced drying in heated ovens or tunnels. 

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