A front cover, a rear cover and a base portion are crushed into a crushed material, and further pelletized into a recycled plastic pellet. The recycled plastic pellet is used as a part of a molding material to produce mold plastic parts for a photosensitive material. When the molding material is melt in heat, a thermoplastic resin is deteriorated by heat or modified. Therefore, properties and qualities of recycled plastic mold parts are less than those of new ones. Further, when the thermoplastic resin is deteriorated by heat, the photosensitive material reacts with the thermoplastic resin to decomposed products having an bad influence on photographic characteristics. In order to prevent the deterioration by heat, oxidation inhibiting materials are added, and in order to absorb the decomposed products, carbon blacks are added.
将前盖、后盖和底座部分粉碎成粉碎材料,然后进一步造粒成再生塑料颗粒。再生塑料颗粒用作模塑材料的一部分,用于生产感光材料的模塑部件。当成型材料受热熔化时,热塑性
树脂会受热变质或发生改性。因此,回收塑料模具部件的性能和质量不如新部件。此外,当热塑性
树脂受热变质时,感光材料会与热塑性
树脂发生反应,生成对照片特性有不良影响的分解产物。为了防止受热变质,需要添加氧化抑制材料,为了吸收分解产物,需要添加
炭黑。