Strength agent, its use and method for increasing strength properties of paper
US-10273634-B2 · Apr 30, 2019 · US
Refined cellulose fiber composition
US12084563B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12084563-B2 |
| Application number | US-202017597317-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 30, 2020 |
| Priority date | Jul 4, 2019 |
| Publication date | Sep 10, 2024 |
| Grant date | Sep 10, 2024 |
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- Title
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Abstract
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The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-98 as determined by standard ISO 5267-1, and wherein the refined cellulose fiber composition has a content of fibers having a length >0.2 mm of at least 12 million fibers per gram based on dry weight. The invention further relates to a method for preparing the refined cellulose fiber composition and to pulp paper and paperboard comprising the refined cellulose fiber composition.
First claim
Opening claim text (preview).
The invention claimed is: 1. A refined cellulose fiber composition, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-98 as determined by standard ISO 5267-1, and wherein the refined cellulose fiber composition has a content of fibers having a length >0.2 mm in a range of 15 to 40 million fibers per gram based on a dry weight; and wherein said refined cellulose fibers are refined softwood cellulose fibers. 2. The refined cellulose fiber composition according to claim 1 , wherein said refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 85-98, as determined by standard ISO 5267-1. 3. The refined cellulose fiber composition according to claim 1 , wherein said refined cellulose fiber composition has a content of fibers having a length >0.2 mm in the range of 20 to 30 million fibers per gram based on a dry weight. 4. The refined cellulose fiber composition according to claim 1 , wherein said refined cellulose fiber composition has a crill value in a range of 1.8 to 2.5. 5. The refined cellulose fiber composition according to claim 1 , wherein said refined cellulose fiber composition has a mean fibril area of fibers having a length >0.2 mm in a range of 17% to 50%. 6. A cellulose pulp for manufacturing paper or paperboard, comprising: at least 0.1% by weight of the refined cellulose fiber composition according to claim 1 , based on a dry weight. 7. The cellulose pulp for manufacturing paper or paperboard according to claim 6 , wherein the cellulose pulp is a chemi-thermomechanical pulp (CTMP).
Assignees
Inventors
Classifications
Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00) · CPC title
Additives of definite length or shape · CPC title
Reinforcing agents · CPC title
- D21H11/18Primary
Highly hydrated, swollen or fibrillatable fibres · CPC title
Chemical or chemomechanical {or chemothermomechanical} pulp · CPC title
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Frequently asked questions
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- What does patent US12084563B2 cover?
- The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-98 as determined by standard ISO 5267-1, and wherein the refined cellulose fiber composition has a content of fibers having a length >0.2 mm of at least 12 milli…
- Who is the assignee on this patent?
- Stora Enso Oyj
- What technology area does this patent fall under?
- Primary CPC classification D21H11/18. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Sep 10 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).