Oxidized microfibrillar cellulose fibers and composition thereof
US-2021131036-A1 · May 6, 2021 · US
Carboxymethylated microfibrillated cellulose fibers and composition thereof
US11466405B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11466405-B2 |
| Application number | US-201917042310-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2019 |
| Priority date | Mar 30, 2018 |
| Publication date | Oct 11, 2022 |
| Grant date | Oct 11, 2022 |
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- Title
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Abstract
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Provided is a CM-modified microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.
First claim
Opening claim text (preview).
The invention claimed is: 1. A carboxymethylated microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL, an average fiber diameter of not less than 500 nm, and an electrical conductivity between 10 and 100 mS/m, as measured at pH 8 in the form of a 1% by weight solids concentration water dispersion. 2. The carboxymethylated microfibrillated cellulose fiber according to claim 1 , wherein the electrical conductivity is between 10 and 70 mS/m, as measured at pH 8 in the form of a 1% by weight solids concentration water dispersion. 3. The carboxymethylated microfibrillated cellulose fiber according to claim 2 , having a degree of substitution of from 0.01 to 0.50. 4. The carboxymethylated microfibrillated cellulose fiber according to claim 3 , having a cellulose type-I crystallinity of not less than 50%. 5. The carboxymethylated microfibrillated cellulose fiber according to claim 1 , having a degree of substitution of from 0.01 to 0.50. 6. The carboxymethylated microfibrillated cellulose fiber according to claim 1 , having a cellulose type-I crystallinity of not less than 50%. 7. The carboxymethylated microfibrillated cellulose fiber according to claim 1 , having a water retention value of not less than 300%. 8. A composition comprising the carboxymethylated microfibrillated cellulose fiber according to claim 1 and water. 9. The composition according to claim 8 , further comprising a raw material pulp. 10. The composition according to claim 8 , further comprising a binder. 11. The composition according to claim 8 , further comprising a white pigment. 12. A dry solid formed by drying the composition according to claim 8 . 13. A method of preparing the carboxymethylated microfibrillated cellulose fiber according to claim 1 , the method comprising the steps of: (A) carboxymethylating a pulp, (B) wet-grinding the pulp.
Assignees
Inventors
Classifications
characterised by configuration · CPC title
Cellulose · CPC title
Oxycellulose; Hydrocellulose; {Cellulosehydrate, e.g. microcrystalline cellulose} · CPC title
Cellulose-based fibres, e.g. vegetable fibres · CPC title
substituted with carboxylic radicals {, e.g. carboxymethylcellulose [CMC]} · CPC title
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Frequently asked questions
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- What does patent US11466405B2 cover?
- Provided is a CM-modified microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.
- Who is the assignee on this patent?
- Jujo Paper Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification D21H11/20. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Oct 11 2022 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).