Patent EP0228611A2 successfully refreshed from Google Patents.
EP0228611A2
Expired / Lapsed
EP
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Uniaxially high-oriented polyethylene naphthalate film for polarizing plates
Assignee: Diafoil Co Ltd
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Filing: 1986-12-08
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Granted: —
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Expires: 2006-12-08
Abstract
Abstract Disclosed herein is a uniaxially high-oriented polyethylene naphthalate film for polarizing plates which contains a dichroic dyestuff, having an in-plane birefringence of more than 0.110 after the film is stretched and subjected to heatset treatment.
Inventors
- 👤 Shigeo Utsumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:44
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02B; G02B1/00; G02B1/08; G02B5/00; G02B5/30; G02B5/3083; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
32 words
A uniaxially high-oriented polyethylene naphthalate film for polarizing plates containing a dichroic dyestuff, and having an in-plane birefringence of more than 0.110 after said film is stretched and subjected to heatset treatment.
Claim 2
Dependent Claim
32 words
A uniaxially high-oriented polyethylene naphthalate film for polarizing plates containing a dichroic dyestuff, and having an in-plane birefringence of more than 0.110 after said film is stretched and subjected to heatset treatment.
Claim 3
Dependent Claim
42 words
A film according to claim 1, wherein the heat shrinkage ratio in the longitudinal direction and the transverse direction of said film measured after said film is subjected to heat treatment at 150°C for 30 minutes is not more than 2 %.
Claim 4
Dependent Claim
28 words
A film according to claim 1, wherein the haze of said film is not more than 5 % with respect to a film of 100 um in thickness.
Claim 5
Dependent Claim
17 words
A film according to claim 1, wherein the thickness of said film is 10 to 250 µm.
Claim 6
Dependent Claim
25 words
A film according to claim 1, wherein the content of said dichroic dyestuff is 0.003 to 3 % by weight with respect to polyethylene naphthalate.
Claim 7
Dependent Claim
32 words
A polarizing plate comprising a uniaxially high-oriented polyethylene naphthalate film containing a dichroic dyestuff, having an in-plane birefringence of more than 0.110 after said film is stretched and subjected to heatset treatment.
Claim 8
Dependent Claim
32 words
A polarizing plate comprising a uniaxially high-oriented polyethylene naphthalate film containing a dichroic dyestuff, having an in-plane birefringence of more than 0.110 after said film is stretched and subjected to heatset treatment.
References Cited (Backward Citations)
No citation records indexed.
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