Analysis of Common Defects in Laboratory Coating Machine Blade Coating and Adjustment Methods for Process Parameters

This article introduces common defects in the scraping process of laboratory coaters, such as streaks, orange peel, bubbles, uneven thickness, and skipped coating. It analyzes the causes of these issues, which are primarily related to material properties, operating parameters, and environmental factors. The article then presents methods for adjusting process parameters, including key variables such as doctor blade pressure, coating gap, speed, substrate tension, and slurry viscosity, and provides two commonly used formulas to assist in adjusting the wet film thickness and drying time of the coating. Finally, the article recommends a step-by-step troubleshooting approach, starting from substrate cleaning and doctor blade condition to gradually adjusting parameters in order to progressively eliminate defects.