基本信息:
- 专利标题： METHOD FOR RECOVERING PULP FIBERS FROM USED ABSORBENT ARTICLE
- 申请号：US16322109 申请日：2017-06-09
- 公开(公告)号：US20190186074A1 公开(公告)日：2019-06-20
- 发明人： Takayoshi KONISHI , Toshio HIRAOKA , Koichi YAMAKI , Noritomo KAMEDA
- 申请人： UNICHARM CORPORATION
- 优先权： JP2016-154964 20160805
- 国际申请： PCT/JP2017/021539 WO 20170609
- 主分类号： D21C5/02
- IPC分类号： D21C5/02 ; D21B1/10 ; A61L2/18 ; A61L11/00 ; B29B17/02 ; B09B3/00
摘要：
A method is provided for recovering pulp fibers having little damage from a used absorbent article which includes a water permeable front sheet, a water impermeable back sheet and an absorbent body that contains pulp fibers and a superabsorbent polymer. At least one opening with a circle equivalent diameter of 5-45 mm, or 10-45 mm cut, is made in the front sheet and/or the back sheet of the used absorbent article, which is then agitated in an organic acid aqueous solution with a pH of less than or equal to 2.5, and the superabsorbent polymer is deactivated and the pulp fibers and superabsorbent polymer are discharged from the used absorbent article through the opening or cut.
公开/授权文献:
IPC结构图谱:
| D | 纺织；造纸 |
| --D21 | 造纸；纤维素的生产 |
| ----D21C | 从含纤维素原料中除去非纤维素物质生产纤维素；制浆药液的再生；所需设备 |
| ------D21C5/00 | 制取纤维素的其他工艺方法，例如蒸煮棉短绒 |
| --------D21C5/02 | .加工废纸 |