发明授权
- 专利标题： Process for removing waterborne flexographic inks from substrates
- 专利标题（中）： 从基材中除去水性柔版油墨的方法
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申请号： US416417申请日： 1995-04-04
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公开(公告)号： US5632857A公开(公告)日： 1997-05-27
- 发明人: Eric H. Larson
- 申请人： Eric H. Larson
- 申请人地址： NJ Princeton
- 专利权人： Rhone-Poulenc Inc.
- 当前专利权人： Rhone-Poulenc Inc.
- 当前专利权人地址： NJ Princeton
- 主分类号： D21C5/02
- IPC分类号： D21C5/02
摘要：
A process for removing water borne flexographic inks from paper stock comprising the steps of (a) forming a slurry by pulping paper containing water borne flexographic inks in an aqueous medium having a pH of greater than 8 which includes: (1) one or more basic agents; (2) one or more nonionic surfactants; (3) one or more anionic polyelectrolytes; and (4) an amount of paper different from that being processed which contains inorganic fillers, coatings or mixtures thereof; and (b) subjecting the slurry produced in step (a) to a flotation cell having an aqueous medium having a pH of greater than 8 which includes: (1) one or more basic agents; (2) one or more nonionic surfactants; and (3) one or more anionic polyelectrolytes is provided.
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