Paper filler composition
US-2024240400-A1 · Jul 18, 2024 · US
Modified fiber, methods, and systems
US2016369454A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016369454-A1 |
| Application number | US-201615253450-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 31, 2016 |
| Priority date | Jun 30, 2014 |
| Publication date | Dec 22, 2016 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
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Methods of forming crosslinked cellulose include mixing a crosslinking agent with an aqueous mixture of cellulose fibers containing little to no excess water (e.g., solids content of 25-55%), drying the resulting mixture to 85-100% solids, then curing the dried mixture to crosslink the cellulose fibers. Systems include a mixing unit to form, from an aqueous mixture of unbonded cellulose fibers having a solids content of about 25-55% and a crosslinking agent, a substantially homogenous mixture of non-crosslinked, unbonded cellulose fibers and crosslinking agent; a drying unit to dry the substantially homogenous mixture to a consistency of 85-100%; and a curing unit and to cure the crosslinking agent to form dried and cured crosslinked cellulose fibers. Intrafiber crosslinked cellulose pulp fibers produced by such methods and/or systems have a chemical on pulp level of about 2-14% and an AFAQ capacity of at least 12.0 g/g.
First claim
Opening claim text (preview).
What is claimed is: 1 . Intrafiber crosslinked cellulose pulp fibers having a chemical on pulp level of about 2-14% and an AFAQ capacity of at least 12.0 g/g. 2 . The fibers of claim 1 , wherein the cellulose pulp fibers include hardwood cellulose pulp fibers. 3 . The fibers of claim 2 , wherein the cellulose pulp fibers are hardwood cellulose pulp fibers. 4 . The fibers of claim 2 , wherein the hardwood cellulose pulp fibers are eucalyptus pulp fibers. 5 . The fibers of claim 1 , wherein the cellulose pulp fibers are intrafiber crosslinked with a polyacrylic acid and/or polycarboxylic acid crosslinking agent. 6 . The fibers of claim 1 , having an AFAQ capacity of at least 16.0 g/g.
Assignees
Inventors
Classifications
Intercrosslinking of at least two polymers · CPC title
- D21H11/20Primary
Chemically or biochemically modified fibres · CPC title
Cellulose; Modified cellulose · CPC title
by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives · CPC title
organic compounds · CPC title
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- What does patent US2016369454A1 cover?
- Methods of forming crosslinked cellulose include mixing a crosslinking agent with an aqueous mixture of cellulose fibers containing little to no excess water (e.g., solids content of 25-55%), drying the resulting mixture to 85-100% solids, then curing the dried mixture to crosslink the cellulose fibers. Systems include a mixing unit to form, from an aqueous mixture of unbonded cellulose fibers …
- Who is the assignee on this patent?
- Weyerhaeuser Nr Co
- 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 Thu Dec 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).