Recovery of polyester from spent film
    1.
    发明授权
    Recovery of polyester from spent film 失效
    从废膜中回收聚酯

    公开(公告)号:US5665784A

    公开(公告)日:1997-09-09

    申请号:US550196

    申请日:1995-10-30

    摘要: Spent photographic film having at least a polyester base, blue dye, and a polyvinylidene binder layer, and from which the photographic emulsion has been removed, is treated to recover usable polyester. The spent photographic film is heated in cyclohexanone at a temperature sufficient and for a time sufficient to remove both polyvinylidene and dye compounds from the polyester base. The recovered polyester may then be mixed with virgin polyester and extruded to produce a polyester product comprising in part recovered polyester and in part virgin polyester.

    摘要翻译: 处理具有至少聚酯基材,蓝色染料和聚偏二氟乙烯粘结剂层并且已经从其中除去照相乳液的废照相胶片,以回收可用的聚酯。 用过的照相胶片在足够的温度下在环己酮中加热足够的时间以从聚酯基体中除去聚偏二氯乙烯和染料化合物。 然后将回收的聚酯与原始聚酯混合并挤出以制备包含部分回收的聚酯和部分原始聚酯的聚酯产品。

    Recovery of polyester from spent film
    2.
    发明授权
    Recovery of polyester from spent film 失效
    从废膜中回收聚酯

    公开(公告)号:US5523329A

    公开(公告)日:1996-06-04

    申请号:US945675

    申请日:1992-09-16

    摘要: Spent photographic film having at least a polyester base, blue dye, and a polyvinylidene binder layer, and from which the photographic emulsion has been removed, is treated to recover usable polyester. The spent photographic film is heated in cyclohexanone at a temperature sufficient and for a time sufficient to remove both polyvinylidene and dye compounds from the polyester base. The recovered polyester may then be mixed with virgin polyester and extruded to produce a polyester product comprising in part recovered polyester and in part virgin polyester.

    摘要翻译: 处理具有至少聚酯基材,蓝色染料和聚偏二氟乙烯粘结剂层并且已经从其中除去照相乳液的废照相胶片,以回收可用的聚酯。 用过的照相胶片在足够的温度下在环己酮中加热足够的时间以从聚酯基体中除去聚偏二氯乙烯和染料化合物。 然后将回收的聚酯与原始聚酯混合并挤出以制备包含部分回收的聚酯和部分原始聚酯的聚酯产品。