![]() Direct roll coating is thought of as a low shear process (the application roller often just kisses the substrate), but the doctor blade and pre-application rollers may apply high shearing stresses. This also is true of reverse roll coating. With spraying and brushing, a high shearing stress is applied to the paint. Shearing can be envisaged in terms of placing a small amount of liquid in the palm of your hand and smearing it by passing your other hand over the first one. All aspects of paint flow, including stirring, pumping, transferring, sagging, and application involve shearing actions. However, that viscosity is not measured under just any set of conditions or done with just any viscometer. s) provides acceptable spraying, brushing, or roll coating.There is a rule of thumb in the paint industry that a viscosity of approximately 100 cps (1 P, 0.1 Pa ![]() I thought that I would extend my answer to other application methods and share the information. I recently was asked about the optimum viscosity for spraying paint. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |