| 摘要 |
PURPOSE:To obviate the generation of pinholes in a photosensitive layer of an org. photosensitive body for electrophotography having an under coating layer and photosensitive layer on a substrate by incorporating a nitrocellulose of 30,000-120,000mol.wt. into the under coating layer. CONSTITUTION:The generation of the pinholes in the photosensitive layer in particular is effectively prevented and the sensitivity of the org. photosensitive body is improved by using the nitrocellulose of 30,000-120,000mol.wt. for the under coating layer. The strength of the coated film is weak if the mol.wt. is below 30,000 and the nitrocellulose is hardly soluble in a solvent if the mol.wt. exceeds 120,000. The layer thickness of the under coating layer is specified to a 0.5-15mum range. The injection of electric charge from the substrate to the photosensitive layer cannot be blocked if the layer thickness is below 0.5mum, and the residual potential of the photosensitive layer is not effectively removed if the layer thickness exceeds 15mum. The under coating layer is formed by dissolving the nitrocellulose in a suitable org. solvent, then coating the soln. thereof on the conductive substrate. |
