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US4387133A
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Laminated light-polarizing sheet
Assignee: Toyobo Co Ltd
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Filing: 1981-07-06
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Granted: 1983-06-07
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Expires: 2001-07-06
Abstract
Abstract A laminated light-polarizing sheet comprising a film or sheet of a polymer, especially a phenoxyether polymer, laminated at least on one surface of a light-polarizing film and a transparent conductive layer formed by vacuum metal evaporation etc. on a surface of a film or sheet to the light-polarizing film, wherein the film or sheet has specified ranges of retardation value, heat distortion temperature, average visible light transmittance, water vapor permeability, Izod impact strength and degree of swelling in solvents.
Inventors
- 👤 Rinjiro Ichikawa
- 👤 Chiyoji Hitomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:59
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133528; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/28; B32B27/286; B32B27/36; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; B32B2250/00; B32B2250/40; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/40; B32B2307/412; B32B2307/70; B32B2307/732; B32B2307/734; B32B2363/00; B32B2367/00; B32B2457/00; B32B2457/20; B32B2457/202; C; C09; C09K; C09K2323/00; C09K2323/03; C09K2323/031; G02F1/133305; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31529; Y10T428/31533; Y10T428/31551; Y10T428/31605; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699; Y10T428/31786; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
136 words
A laminated light-polarizing sheet comprising a light-polarizing film, a polymeric supporting film or sheet having a thickness in the range of 5 to 1000 microns formed to at least one surface of said light-polarizing film, and a transparent conductive layer comprising a metal oxide or a mixture of metal oxides or a metal formed on the surface of said polymeric supporting film or sheet opposite to said light-polarizing film wherein said polymeric supporting film or sheet has the following physical properties: Retardation value: not more than 30 millimicrons; Heat distortion temperature: not lower than 80° C.; Average visible light transmittance: not less than 75%; Water vapor permeability: not higher than 30 g/m 2 ·24 hr.; Izod impact strength: not less than 1.5 kg·cm/cm; Degree of swelling on a surface in a solvent: not more than 0.5%.
Claim 2
Dependent Claim
136 words
A laminated light-polarizing sheet comprising a light-polarizing film, a polymeric supporting film or sheet having a thickness in the range of 5 to 1000 microns formed to at least one surface of said light-polarizing film, and a transparent conductive layer comprising a metal oxide or a mixture of metal oxides or a metal formed on the surface of said polymeric supporting film or sheet opposite to said light-polarizing film wherein said polymeric supporting film or sheet has the following physical properties: Retardation value: not more than 30 millimicrons; Heat distortion temperature: not lower than 80° C.; Average visible light transmittance: not less than 75%; Water vapor permeability: not higher than 30 g/m 2 ·24 hr.; Izod impact strength: not less than 1.5 kg·cm/cm; Degree of swelling on a surface in a solvent: not more than 0.5%.
Claim 3
Dependent Claim
26 words
A laminated light-polarizing sheet according to claim 1, wherein the polymeric supporting film or sheet has a critical bending length of not more than 5 mm.
Claim 4
Dependent Claim
57 words
A laminated light-polarizing sheet according to claim 1 or 2, wherein said surface of said polymeric supporting film or sheet on the opposite side with respect to said light-polarizing film is cured after it is coated or impregnated with a monomer and/or curable polymer, the so-formed cured layer having a thickness of from 1 to 10 microns.
Claim 5
Dependent Claim
113 words
A laminated light-polarizing sheet according to claim 1 or 2, wherein said polymeric supporting film or sheet is made of a cross-linked phenoxyether polymer obtained on cross-linking reaction between a polyfunctional compound and active hydrogen groups of a phenoxyether polymer having at least 20 units and not less than 50 weight percent of repeat units of the formula: ##STR4## wherein R 1 to R 6 are independently hydrogen or alkyl groups containing 1 to 3 carbon atoms, R 7 is an alkylene group containing 2 to 4 carbon atoms and m is an integer of 0 to 3 or a mixture consisting predominantly of said phenoxyether polymer and one or more other polymers.
Claim 6
Dependent Claim
25 words
A laminated light-polarizing sheet according to claim 4, wherein said phenoxyether polymer has the formula: ##STR5## wherein n is an integer of 50 to 500.
Claim 7
Dependent Claim
40 words
A laminated light-polarizing sheet according to claim 3, wherein the monomer and/or curable polymer is mainly composed of an acryloyl or methacryloyl compound containing at least 50% of a monomer having at least 3 aryloyloxy and/or methacryloyloxy groups per molecule.
Claim 8
Dependent Claim
94 words
A laminated light-polarizing sheet according to claim 3, wherein the curable polymer is a mixture of polyfunctional compound and phenoxyether polymer having at least 20 units and not less than 50 weight percent of repeat units of the formula: ##STR6## wherein R 1 to R 6 are independently hydrogen or alkyl groups containing 1 to 3 carbon atoms, R 7 is an alkylene group containing 2 to 4 carbon atoms and m is an integer of 0 to 3 or a mixture consisting predominantly of said phenoyether polymer and one or more other polymers.
Claim 9
Dependent Claim
28 words
A laminated light-polarizing sheet according to claim 3, wherein said curable polymer consists of an epoxy resin or a mixture thereof with other polymers and a curing agent.
Claim 10
Dependent Claim
31 words
A laminated light-polarizing sheet according to claim 3, wherein the polymeric supporting film or sheet is formed of a polymeric material selected from the group consisting of polyethersulfones, polysulfones and polyacrylates.
Claim 11
Dependent Claim
43 words
A laminated light-polarizing sheet according to claim 1 or 2, further comprising a biaxially stretched film or sheet of a terephthalate polyester, having a heat distortion temperature of not lower than 130° C., laminated to the opposite side of said transparent conductive layer.
Claim 12
Dependent Claim
15 words
A laminated light-polarizing sheet according to claim 10, wherein said terephthalate polyester is polyethylene terephthalate.
Claim 13
Dependent Claim
47 words
A laminated light-polarizing sheet according to claim 1 or 2, wherein the laminated light-polarizing film has a light transmittance of not less than 60% within the wavelength range of 500 to 800 microns and of not more than 10% within the range of 420 to 230 microns.
Claim 14
Dependent Claim
25 words
A laminated light-polarizing sheet according to claim 1 or 2, further comprising a reflective layer lying on the side opposite to the transparent conductive layer.
Claim 15
Dependent Claim
24 words
A laminated light-polarizing sheet according to claim 1 or 2, wherein the light-polarizing element of said light-polarizing film comprises dichroic dyes or polyene linkages.
Claim 16
Dependent Claim
24 words
A laminated light-polarizing sheet according to claim 1, wherein the polymeric supporting film or sheet is laminated on the light-polarizing film by hot glueing.
Claim 17
Dependent Claim
33 words
A laminated light-polarizing sheet according to claim 1, wherein said polymeric supporting film is laminated on the light-polarizing film by coating said light-polarizing film with a synthetic resin and then curing the same.
Claim 18
Dependent Claim
21 words
A laminated light-polarizing sheet according to claim 1, wherein the polymeric supporting film or sheet is bonded on the light-polarizing film.
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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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |