Invention Grant
- Patent Title: High-efficiency strength program used for making paper in higher charge demand system
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Application No.: US16305967Application Date: 2017-05-31
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Publication No.: US10982391B2Publication Date: 2021-04-20
- Inventor: Meng Zhang , Yulin Zhao , Na Xu
- Applicant: Ecolab USA Inc.
- Applicant Address: US MN St. Paul
- Assignee: Ecolab USA Inc.
- Current Assignee: Ecolab USA Inc.
- Current Assignee Address: US MN St. Paul
- Agency: Barnes & Thornburg LLP
- Agent Eric D. Babych
- Priority: CN201610382070.7 20160601
- International Application: PCT/US2017/035229 WO 20170531
- International Announcement: WO2017/210304 WO 20171207
- Main IPC: D21H21/18
- IPC: D21H21/18 ; D21H17/37 ; D21H17/45 ; D21H17/66 ; D21H17/00
Abstract:
A method of enhancing paper strength properties is provided. The method comprises treating a paper sheet precursor with a polyaluminum salt, and a strengthening agent, wherein the strengthening agent comprises a dialdehyde-modified polyacrylamide copolymer and a polyacrylamide copolymer. The polyaluminum salt may be polyaluminum chloride. The methods have been demonstrated to provide, among other things, improvements in retention, strength, and dewatering.
Public/Granted literature
- US20190301101A1 High-Efficiency Strength Program Used for Making Paper in Higher Charge Demand System Public/Granted day:2019-10-03
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