Process for recovering materials from scrapped film
AssigneeFuji Photo Film Co., Ltd.
InventorsKunihira Seto, Kyoichi Naruo
Life of this patent
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Abstract
A process for recovering materials from scrapped film is described which comprises separating coating layers and a film base from a scrapped film having at least one coating layer on a plastic film base in a sheet or web form, wherein the improvement comprises: impregnating the coating layers of said scrapped film with a strong alkaline solution and stripping the coating layers by means of high pressure jet water to separate said coating layers from the film base before the coating layers are dissolved in or separated from the film base by said alkaline solution.
Claims12
A process for recovering materials from scrapped photographic film which comprises separating coating layers and a film base from a scrapped photographic film having at least one coating layer on a plastic film base, wherein the improvement comprises:
- impregnating the coating layers of said scrapped film with a strong alkaline solution having a pH of at least 9.0 at 25.degree. C. and stripping the coating layers by means of high pressure jet water having a temperature of from about 5.degree. to 95.degree. C. and a pressure of from about 3 to 50 kg/cm.sup.2 to separate said coating layers from the film base before the coating layers are dissolved in or separated from the film base by said alkaline solution.
Dependencies are inferred from the claim text.