Degradable polymeric compositions and articles comprising same
US-2024425683-A1 · Dec 26, 2024 · US
Protective film for polarizing plate and polarizing plate using the same
US9650481B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9650481-B2 |
| Application number | US-201615188127-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 21, 2016 |
| Priority date | Dec 27, 2013 |
| Publication date | May 16, 2017 |
| Grant date | May 16, 2017 |
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.
There are provided a protective film for a polarizing plate, wherein the protective film comprises a stretched film comprising a (meth)acryl-based resin and having an absolute value of a planar orientation coefficient ΔP of less than or equal to 2.5×10 −4 , and a polarizing plate comprising a polarizing film, and the protective film for a polarizing plate laminated on at least one surface of the polarizing film via an adhesive layer. The stretched film can be, for example, a biaxially stretched film.
First claim
Opening claim text (preview).
What is claimed is: 1. A protective film for a polarizing plate, wherein the protective film comprises a monolayer stretched film comprising a (meth)acryl-based resin and having an absolute value of a planar orientation coefficient ΔP of less than or equal to 2.5×10 −4 . 2. The protective film for a polarizing plate according to claim 1 , wherein the stretched film comprises rubber particles. 3. The protective film for a polarizing plate according to claim 1 , wherein the stretched film is a biaxially stretched film. 4. The protective film for a polarizing plate according to claim 1 , wherein the stretched film has a thickness of 10 to 150 μm. 5. The protective film for a polarizing plate according to claim 1 , further comprising a surface-treatment layer laminated on the stretched film. 6. The protective film for a polarizing plate according to claim 1 , wherein the stretched film has an thickness-directional phase retardation value R th in a range of −35 to 35 nm. 7. The protective film for a polarizing plate according to claim 1 , wherein the stretched film has an in-plane phase retardation value R 0 in a range of 0 to 15 nm. 8. A polarizing plate comprising: a polarizing film, and the protective film for a polarizing plate according to claim 1 laminated on at least one surface of the polarizing film via an adhesive layer. 9. A polarizing plate according to claim 8 , wherein the adhesive layer comprises a cured product of at least one component selected from a group consisting of an epoxy compound, an oxetane compound and a (meth)acryl-based compound.
Assignees
Inventors
Classifications
LCD, i.e. liquid crystal displays · CPC title
Homopolymers or copolymers of acrylic acid esters · CPC title
Optical elements · CPC title
Of addition polymer from unsaturated monomers · CPC title
comprising vinyl {(co)polymers; comprising acrylic (co)polymers} · 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 US9650481B2 cover?
- There are provided a protective film for a polarizing plate, wherein the protective film comprises a stretched film comprising a (meth)acryl-based resin and having an absolute value of a planar orientation coefficient ΔP of less than or equal to 2.5×10 −4 , and a polarizing plate comprising a polarizing film, and the protective film for a polarizing plate laminated on at least one surface of th…
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- 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 May 16 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).