In this study, blade-coating deposition was investigated for the ability to prepare thin films of unmodified sunscreens on substrates. The effect of rheological behavior on film thickness prepared by blade coating deposition was examined by employing four sunscreen formulations (SF1–SF4) with different amount of gelling agent as a model system. The highest thixotropy (18336.31 dyne/cm²·s) and viscosity (9.6 Pa·s) of SF4 applied with the slowest deposition speed (17 µm/s) showed the thinnest film thickness below 10 µm. Two commercial sunscreens (SC1 and SC2) were employed to evaluate the validation of SFs model regarding the relationship between viscosity and film thickness. With similar viscosity values, film thicknesses of SC1 and SC2 prepared with same deposition speeds were close to those of SF1 and SF2, respectively. This work demonstrated a strong influence of rheological behavior in terms of viscosity and blade coating deposition speed on film thickness of sunscreen.

在这项研究中，研究了叶片涂布沉积在基材上制备未改性防晒霜薄膜的能力。通过使用四种防晒霜配方（SF1-SF4）和不同量的胶凝剂作为模型系统，研究了流变行为对通过叶片涂层沉积制备的膜厚的影响。最高触变性（18336.31达因/厘米²·s）和以最慢沉积速度（17 µm / s）施加的SF4的粘度（9.6 Pa·s）显示出低于10 µm的最薄膜厚度。两种商用防晒霜（SC1和SC2）用于评估SFs模型在粘度和薄膜厚度之间关系方面的有效性。在相似的粘度值下，以相同的沉积速度制备的SC1和SC2的膜厚度分别接近SF1和SF2的膜厚度。这项工作证明了粘度和叶片涂层沉积速度对流变行为的强烈影响对防晒膜的厚度。