Modified polyvinyl alcohol and water-soluble film
US-2017275394-A1 · Sep 28, 2017 · US
Poly(vinyl alcohol) film and production method for polarizing film
US12084552B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12084552-B2 |
| Application number | US-201917041585-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2019 |
| Priority date | Mar 30, 2018 |
| Publication date | Sep 10, 2024 |
| Grant date | Sep 10, 2024 |
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- Title
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Abstract
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A polyvinyl alcohol film comprising a vinyl alcohol-based polymer, wherein, when the polyvinyl alcohol film is measured by a solid echo method using pulse NMR at 80° C. for waveform separation of a free induction decay curve of 1H spin-spin relaxation into three curves derived from three components a component A, a component B, and a component C in order of short relaxation time, the component A has a resulting relaxation time of 0.0083 milliseconds or more and 0.0093 milliseconds or less, and a resulting component ratio of 10% or more and 35% or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polyvinyl alcohol film comprising a vinyl alcohol-based polymer, wherein, when the polyvinyl alcohol film is measured by a solid echo method using pulse NMR at 80° C. for waveform separation of a free induction decay curve of 1H spin-spin relaxation into three curves derived from three components a component A, a component B, and a component C in order of short relaxation time, the component A has: a resulting relaxation time of 0.0083 milliseconds or more and 0.0093 milliseconds or less, and a resulting component ratio in the NMR of 18% or more and 35% or less, the component ratio being a ratio based on a total amount of the component A, the component B, and the component 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 2000 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
- G02B5/3033Primary
in the form of a thin sheet or foil, e.g. Polaroid · CPC title
Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title
Polyhydroxylic alcohols · CPC title
Polyalkylene oxides · CPC title
Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title
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- What does patent US12084552B2 cover?
- A polyvinyl alcohol film comprising a vinyl alcohol-based polymer, wherein, when the polyvinyl alcohol film is measured by a solid echo method using pulse NMR at 80° C. for waveform separation of a free induction decay curve of 1H spin-spin relaxation into three curves derived from three components a component A, a component B, and a component C in order of short relaxation time, the component …
- Who is the assignee on this patent?
- Sekisui Chemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B5/3033. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 10 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).