挤压涂布已广泛使用于感光材料的生产,其主要优点是能够显著地提高劳动生产率(40～60％)和改善涂层均匀度。电影胶片最主要的指标之一是其乳剂层的统一性,由于感光层主要是在片基涂布过程中形成的,因而可以认为引起涂布不均匀的不稳定因素主要出现在乳剂涂布区。 Extrusion coating has been widely used in the production of photosensitive materials, the main advantages of which can significantly improve labor productivity (40 ~ 60%) and improve coating uniformity. One of the most important indicators of motion picture film is the consistency of its emulsion layer. Since the photosensitive layer is mainly formed during the film-based coating process, it can be considered that the unstable factors causing uneven coating mainly appear in the emulsion coating area .