Polarizing plate and display device
US-2020408978-A1 · Dec 31, 2020 · US
Poly(vinyl alcohol) film and production method for polarizing film
US11947144B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11947144-B2 |
| Application number | US-201916979604-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2019 |
| Priority date | Mar 30, 2018 |
| Publication date | Apr 2, 2024 |
| Grant date | Apr 2, 2024 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The present invention relates to a polyvinyl alcohol film comprising a vinyl alcohol-based polymer, the polyvinyl alcohol film having an NMR signal intensity at 0.10 milliseconds of 78% or less of the initial intensity, when the polyvinyl alcohol film after immersing in water at 60° C. for 2 hours is measured as a measurement sample by a solid echo method using pulse NMR at 60° C. According to the polyvinyl alcohol film of the present invention, a polarizing film having good polarization performance, which is unlikely to decrease even under high humidity, can be manufactured.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polyvinyl alcohol film comprising a vinyl alcohol-based polymer, the polyvinyl alcohol film having an NMR signal intensity at 0.10 milliseconds of 78% or less of the initial intensity, when the polyvinyl alcohol film after immersing in water at 60° C. for 2 hours is measured as a measurement sample by a solid echo method using pulse NMR at 60° C. 2. The polyvinyl alcohol film according to claim 1 , wherein the vinyl alcohol-based polymer has a degree of saponification of 99 mol % or more. 3. The polyvinyl alcohol film according to claim 1 , wherein the vinyl alcohol-based polymer has a degree of polymerization of 1500 or more and 4000 or less. 4. The polyvinyl alcohol film according to claim 1 , comprising a plasticizer. 5. The polyvinyl alcohol film according to claim 1 , for use in a polarizing film. 6. A method for manufacturing a polarizing film comprising using the polyvinyl alcohol film according to claim 1 . 7. The method for manufacturing a polarizing film according to claim 6 , comprising steps of dyeing the polyvinyl alcohol film, stretching the polyvinyl alcohol film, and performing a fixation treatment to the dyed polyvinyl alcohol film. 8. The method for manufacturing a polarizing film according to claim 7 , wherein the fixation treatment is performed after stretching of the polyvinyl alcohol film.
Assignees
Inventors
Classifications
- G02B5/305Primary
including organic materials, e.g. polymeric layers · CPC title
Films or sheets · CPC title
PVOH, i.e. polyvinyl alcohol (B29K2031/04 takes precedence) · CPC title
- G02B5/3033Primary
in the form of a thin sheet or foil, e.g. Polaroid · CPC title
- C08J5/18Primary
Manufacture of films or sheets · CPC title
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- What does patent US11947144B2 cover?
- The present invention relates to a polyvinyl alcohol film comprising a vinyl alcohol-based polymer, the polyvinyl alcohol film having an NMR signal intensity at 0.10 milliseconds of 78% or less of the initial intensity, when the polyvinyl alcohol film after immersing in water at 60° C. for 2 hours is measured as a measurement sample by a solid echo method using pulse NMR at 60° C. Accordi…
- Who is the assignee on this patent?
- Sekisui Chemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B5/305. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 02 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).