US4643529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarizing film
Assignee: Mitsui Chemicals Inc
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Filing: 1984-12-20
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Granted: 1987-02-17
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Expires: 2004-12-20
Abstract
Abstract Disclosed is a polarizing film containing a base resin and a photodichroic material which is characterized in that (1) the uniaxial orientation coefficient (f) of the principal crystal axis which is a crystal axis parallel to the molecular chain of the base resin, with respect to the reference axis is not less than 0.7 and (2) when a specimen of the polarizing film is cut out so as to have a surface perpendicular to the reference axis and X-rays impinging on the specimen parallel to the reference axis, the product (fxR) of the aforesaid uniaxial orientation coefficient (f) and the proportion (R=(Imin/Imax)x100) of the minimum value (Imin) to the maximum value (Imax) of diffracted X-ray intensity on the resulting Debye-Scherrer ring is not less than 10. This polarizing film has excellent thermal resistance and moisture resistance and gives a high degree of polarization.
Inventors
- 👤 Sin Hosonuma
- 👤 Junichi Fujio
- 👤 Kozo Tanaka
- 👤 Harue Suzuki
- 👤 Kenichi Baba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:15
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; B; B29; B29C; B29C55/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
196 words
A polarizing film containing a base resin and a photodichroic material which is characterized in that (1) the uniaxial orientation coefficient (f) of the principal crystal axis of the base resin with respect to the reference axis is not less than 0.7, the reference axis being defined, when the impinging X-rays are perpendicular to the surface on the polarizing film, as an axis which is in the plane of the polarizing film and which makes an angle of 90° with the axis made by normal projection of the direction of the strongest X-rays in the Debye-Scherrer ring diffracted by crystal planes parallel to the principal crystal axis of the base resin on the polarizing film; and (2) When a specimen of the polarizing film is cut out so as to have a surface perpendicular to the reference axis and X-rays impinging on the specimen parallel to the reference axis, the product (f×R) of the aforesaid uniaxial orientation coefficient (f) and the ratio (R=(I min /I max )×100) of the minimum value (I min ) to the maximum value (I max ) of diffracted X-ray intensity on the resulting Debye Scherrer ring is not less than 10.
Claim 2
Dependent Claim
196 words
A polarizing film containing a base resin and a photodichroic material which is characterized in that (1) the uniaxial orientation coefficient (f) of the principal crystal axis of the base resin with respect to the reference axis is not less than 0.7, the reference axis being defined, when the impinging X-rays are perpendicular to the surface on the polarizing film, as an axis which is in the plane of the polarizing film and which makes an angle of 90° with the axis made by normal projection of the direction of the strongest X-rays in the Debye-Scherrer ring diffracted by crystal planes parallel to the principal crystal axis of the base resin on the polarizing film; and (2) When a specimen of the polarizing film is cut out so as to have a surface perpendicular to the reference axis and X-rays impinging on the specimen parallel to the reference axis, the product (f×R) of the aforesaid uniaxial orientation coefficient (f) and the ratio (R=(I min /I max )×100) of the minimum value (I min ) to the maximum value (I max ) of diffracted X-ray intensity on the resulting Debye Scherrer ring is not less than 10.
Claim 3
Dependent Claim
16 words
A polarizing film as claimed in claim 1 wherein the base resin is a hydrophobic resin.
Claim 4
Dependent Claim
23 words
A polarizing film as claimed in claim 2 wherein the base resin is a polyolefin resin, a polyester resin or a polyamide resin.
Claim 5
Dependent Claim
18 words
A polarizing film as claimed in claim 1 wherein the photodichroic material is a photodichroic organic coloring material.
References Cited (Backward Citations)
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US4229498A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |