Carboxymethylated microfibrillar cellulose fibers and composition thereof
US-2021238313-A1 · Aug 5, 2021 · US
Oxidized microfibrillated cellulose fibers and composition thereof
US11512432B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11512432-B2 |
| Application number | US-201917042302-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2019 |
| Priority date | Mar 30, 2018 |
| Publication date | Nov 29, 2022 |
| Grant date | Nov 29, 2022 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Provided is an oxidized 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. An oxidized microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL, an average fiber diameter of not less than 500 nm, an average fiber length of not more than 500 μm, and a water retention value of not less than 300%. 2. The oxidized microfibrillated cellulose fiber according to claim 1 , wherein the electrical conductivity is between 10 and 100 mS/m, as measured at pH 8 in the form of a 1% by weight solids concentration water dispersion. 3. The oxidized microfibrillated cellulose fiber according to claim 2 , having a carboxyl group content of 0.1 to 3.0 mmol/g. 4. The oxidized microfibrillated cellulose fiber according to claim 3 , having a cellulose type-I crystallinity of not less than 50%. 5. The oxidized microfibrillated cellulose fiber according to claim 1 , having carboxyl group content of 0.1 to 3.0 mmol/g. 6. The oxidized microfibrillated cellulose fiber according to claim 1 , having a cellulose type-I crystallinity of not less than 50%. 7. The oxidized microfibrillated cellulose fiber according to claim 1 , wherein the water retention value of not less than 350%. 8. The oxidized 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.
Assignees
Inventors
Classifications
- D21H11/18Primary
Highly hydrated, swollen or fibrillatable fibres · CPC title
antistatic; conductive · CPC title
characterised by configuration · CPC title
Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide · CPC title
Oxycellulose; Hydrocellulose; {Cellulosehydrate, e.g. microcrystalline cellulose} · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11512432B2 cover?
- Provided is an oxidized 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 D21H11/18. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Nov 29 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).