Method for preparing unbleached biomechanical pulp from straw
US11624154B2 · kind B2 · utility
1Cited by
0References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 29, 2019 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Jan 9, 2040 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for preparing unbleached biomechanical pulp from straw. A straw is used as a raw material, which is treated with alkaline biological enzymes, heated with hot alkali steam, refined, and washed. The mechanical pulp prepared by the method of the present invention has significantly improved ring-crush strength, can be used to prepare corrugated paper or cardboard paper, and can significantly improve the compressive strength of the carton.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.