| 摘要 |
PURPOSE:To prevent occurrence of fog of the photosensitive material and to enhance lubricity by adding an aliphatic ester into a moderate impact-resistant polystyrene resin containing carbon black. CONSTITUTION:The resin molded product for the photosensitive material comprises a moderate impact-resistant polystyrene resin as a main resin constituent and contains carbon black and the aliphatic ester embodied, preferably, by glycerin monostearate, butyl stearate, ethylene glycol monostearate, pentaerythrotol monocaprate, and the like, and as the carbon black, various kinds of them may be used. The polystyrene resin is not kneaded mixtures of HIPS and GPPS used conventionally but the moderate impact-resistant polystyrene resin obtained by purifying an intermediate product in a direct polymerization process, and it is low in cost and remarkable in operation effect and suitable for this purpose. |
