Cellulose fiber-containing resin composition, sheet, and molded body
US-2020399443-A1 · Dec 24, 2020 · US
Sheet
US11447612B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11447612-B2 |
| Application number | US-201716315723-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 7, 2017 |
| Priority date | Jul 8, 2016 |
| Publication date | Sep 20, 2022 |
| Grant date | Sep 20, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
The purpose of the present invention is to provide a composite sheet in which the dimension stability when it is tensed is high and the appearance deterioration and the yellowness change are suppressed. The present invention relates to a sheet comprising; cellulose fibers having a fiber width of 1000 nm or less and having a phosphoric acid group or a phosphoric acid group-derived substituent; and a polyvinyl alcohol-based resin, wherein the sheet has a tensile elastic modulus of 3.4 GPa or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A sheet comprising: cellulose fibers having a fiber width of 2 to 50 nm and having a phosphoric acid group or a phosphoric acid group-derived substituent; and a polyvinyl alcohol-based resin, wherein the sheet has a tensile elastic modulus of 4.0 GPa or more, the average degree of polymerization of the polyvinyl alcohol-based resin is 300 to 2200, the saponification degree of the polyvinyl alcohol is 50 mol % or more, the content of the cellulose fibers is 10% by mass or more with respect to the total mass of the sheet, and the sheet is made from a suspension which contains the cellulose fibers and the polyvinyl alcohol-based resin. 2. The sheet according to claim 1 , wherein the content of the polyvinyl alcohol-based resin is 9% by mass or more, with respect to the total mass of the sheet. 3. The sheet according to claim 1 , wherein the polyvinyl alcohol-based resin is a modified polyvinyl alcohol-based resin. 4. The sheet according to claim 1 , which further comprises at least any one selected from crosslinkers and crosslinker-derived functional groups. 5. The sheet according to claim 1 , wherein, when the yellowness of a sheet measured in accordance with JIS K 7373 is set at YI 1 and the yellowness of a sheet after being subjected to vacuum drying at 200° C. for 4 hours is YI 2 , the value of YI 2 −YI 1 is 70 or less. 6. The sheet according to claim 4 , wherein the content of the polyvinyl alcohol-based resin is 90% by mass or less, with respect to the total mass of the sheet.
Assignees
Inventors
Classifications
Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title
- C08J5/18Primary
Manufacture of films or sheets · CPC title
with vegetable or animal fibrous material · CPC title
Cellulose; Modified cellulose · CPC title
Esters of inorganic acids · CPC title
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- What does patent US11447612B2 cover?
- The purpose of the present invention is to provide a composite sheet in which the dimension stability when it is tensed is high and the appearance deterioration and the yellowness change are suppressed. The present invention relates to a sheet comprising; cellulose fibers having a fiber width of 1000 nm or less and having a phosphoric acid group or a phosphoric acid group-derived substituent; a…
- Who is the assignee on this patent?
- Oji Holdings Corp
- What technology area does this patent fall under?
- Primary CPC classification C08J5/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 20 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 9 related publications on this page (citations in our corpus or others sharing the same primary CPC).