Water-dispersible paper
US11078625B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2018 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Feb 20, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/7166
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a water-dispersible paper having improved dispersibility in seawater. A water-dispersible paper can have excellent dispersion solubility in seawater and the clogging of a filter by a water-dispersible paper can be reduced, by using an alkalized carboxyalkyl cellulose having a specific degree of etherification (DS) and a specific Runkel ratio. The water-dispersible paper comprises a base paper containing fibrous carboxyalkyl cellulose and papermaking fibers, wherein the content of the fibrous carboxyalkyl cellulose in the base paper is from 25 to 80% by weight, the fibrous carboxyalkyl cellulose is alkalized, the degree of etherification (DS) of the fibrous carboxyalkyl cellulose is from 0.40 to 0.63, and Runkel ratio of the fibrous carboxyalkyl cellulose is from 0.5 to 3.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.