Method of increasing paper surface strength by using polyaluminum chloride in a size press formulation containing starch
US9611589B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | May 10, 2016 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | May 10, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/56
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Size press formulations and methods of treating a substrate using the size press formulations. The size press formulations may include solids. The solids may include a polyaluminum chloride compound, starch, an optical brightening agent, and a salt. Suitable polyaluminum chloride compounds include phosphated polyaluminum chloride, sulfated polyaluminum chloride, polyaluminum chloride, polyaluminum silica sulfate chloride, and any combination thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.