Abstract
In Part I of this work, we identified four important process, base sheet, and formulation variables that strongly influence the runnability of a curtain coater at high speed, using a Taguchi orthogonal array experimen-tal design approach. The effects identified are base sheet roughness, coating rheology, curtain height, and the amount of steam applied in the boundary layer air removal system (steam substitution system [SSS]). In the second phase of our study, we examine the contribution of these four variables on curtain coating stability in more depth using a D-optimal design of experiment. The results show the set-up of the boundary layer air removal system to be the most critical variable to maintaining the stability of the curtain. We found base sheet roughness, in combination with the parameters of the coating formulation, to also be very important. Coating coverage improved with the smoothness of the base sheet and excellent coating coverage was attainable at low coat weights. A shear thinning coating was found to provide the most favorable coating rheology for curtain stability at high speeds.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
