WO2003052469A1 - Film protecteur pour polariseur et plaque de polarisation comprenant ce dernier - Google Patents
Film protecteur pour polariseur et plaque de polarisation comprenant ce dernier Download PDFInfo
- Publication number
- WO2003052469A1 WO2003052469A1 PCT/JP2002/013080 JP0213080W WO03052469A1 WO 2003052469 A1 WO2003052469 A1 WO 2003052469A1 JP 0213080 W JP0213080 W JP 0213080W WO 03052469 A1 WO03052469 A1 WO 03052469A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- polarizer
- polycarbonate
- layer
- protective film
- Prior art date
Links
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/244—All polymers belonging to those covered by group B32B27/36
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2369/00—Polycarbonates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31507—Of polycarbonate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/8305—Miscellaneous [e.g., treated surfaces, etc.]
Definitions
- the present invention relates to a polarizer protective film used for a polarizing plate of a liquid crystal display device and the like, and a polarizing plate using the same.
- the polarizing plate 20 used by being attached to a liquid crystal display device or the like has, for example, the configuration shown in FIG. That is, the polarizing film 10 is formed by sandwiching both surfaces of the polarizer 4 with the protective film 3 for a polarizer serving as a protective layer via the adhesive 7. On one side of the polarizing film 10, the polarizing film protective film 1 is attached via an adhesive 6. A retardation film 5 is adhered to the other side of the polarizing film 10, and a release agent 8 is applied on one side of a film having the same configuration as the polarizing film protective film 1 via an adhesive 6 on the other side.
- polarizer 4 to which the film release protective film 2 is attached a film made of a hydrophilic polymer such as polyvinyl alcohol adsorbing iodine or a dichroic dye and stretch-oriented is used.
- the polarizer protective film 3 that maintains the durability and mechanical properties of the polarizer 4 is optically transparent, that is, hardly develops birefringence, has heat resistance, and has mechanical strength. It is required that the film has a high surface roughness, has a smooth surface, and has good adhesion to the adhesive 7 and the pressure-sensitive adhesive 6, and a non-oriented film such as triacetyl cellulose is used.
- the retardation film 5 is required to have uniform birefringence over the entire surface and not change its optical properties even under severe conditions of high temperature and high humidity.
- Uniaxially stretched polycarbonate film is used
- the protective film 1 for a polarizing film and the release protective film 2 for a polarizing film contaminate the surfaces of the polarizing film 10 and the retardation film 5 during the distribution process of the polarizing film 10 and a process of attaching the polarizing film 10 to a liquid crystal display device. It is used for the purpose of preventing it from being damaged or damaged.It is adhered to the polarizing film 10 or the retardation film 5 through the adhesive 6, and can be easily peeled off when it is attached to a liquid crystal display device. Is desirable.
- the release protective film 2 for a polarizing film it is preferable to apply the release agent 8 to the adhesive surface with the adhesive 6 and to urge the release.
- the protective film 3 for the polarizer there may be used, based on the above-mentioned necessary properties, a cenorellose-based finolem such as triacetyl cenorellose, a polyestenolefinolem, a polyacrinole film, a polycarbonate film, a polyether sulfone film, or the like.
- These polarizer protective films 3 are sandwiched with an adhesive 7 so as to protect both surfaces of the polarizer 4 to form the polarizer film 10.
- the polarizer 4 is obtained by adsorbing iodine or a dichroic dye on a film made of a hydrophilic polymer such as polybutyl alcohol and stretching and stretching the film. It is used without heat fixing because iodine is volatilized. Therefore, it expands and contracts greatly due to changes in ambient temperature and humidity. For this reason, the protective film 3 for a polarizer, which holds the polarizer 4 and restrains deformation due to temperature change and humidity change, is adhered using the adhesive 7, and iodine does not volatilize below 90 ° C.
- An object of the present invention is to provide a polarizer protective film having extremely low birefringence and capable of being directly thermally bonded to a polarizer, and an inexpensive polarizing plate using the same. Disclosure of the invention
- One of the polarizer protective films of the present invention is a polarizer protective film composed of a two-layer film obtained by laminating a polyester film on one surface of a polycarbonate film,
- the two-layer film is a non-oriented film.
- Another one of the protective films for a polarizer of the present invention is a protective film for a polarizer composed of a three-layer film in which a polyester film is laminated on one side of a polycarbonate film and a polybutylene terephthalate is laminated on the other side.
- the three-layer film is a non-oriented film.
- the glass transition temperature of polycarbonate is 100 ° C or more
- the melting point of the polyester is not more than 235 ° C
- Polyester film is ethylene terephthalate // ethylene isophthalate copolymer, or
- It is characterized in that it is a copolymer obtained by substituting a part of the alcohol component of ethylene terephthalate with xanthine methanol at the mouth of the ethylene terephthalate.
- the polarizing plate of the present invention is a polarizing plate using any one of the above protective films for a polarizer.
- FIG. 1 is a schematic sectional view showing an example of the configuration of a polarizing plate.
- FIG. 2 is a schematic sectional view showing an example of the configuration of the two-layer polarizer protective film of the present invention.
- FIG. 3 is a schematic sectional view showing another example of the configuration of the three-layer polarizer protective film of the present invention.
- FIG. 4 is a schematic sectional view showing an example of the configuration of the polarizing plate of the present invention.
- FIG. 5 shows the bias of the present invention.
- FIG. 4 is a schematic cross-sectional view showing another example of the configuration of the light plate.
- a non-oriented three-layer film consisting of a polycarbonate film with a melting point of 235 ° C or less on one side of a polycarbonate film with a temperature of 100 ° C or more and a polybutylene terephthalate film on the other side is a polarizer.
- the protective film for a polarizer can be directly thermally bonded to the polarizer. Therefore, it has been found that the use of this protective film for a polarizer makes it possible to obtain a polarizing plate at low cost without using a special low-temperature heat-curable adhesive.
- the protective film for a polarizer 3 of the present invention is a two-layer non-oriented film formed by laminating a thin polyester film 40 on one side of a polycarbonate film 30 as a base material.
- the polycarbonate film 30, the polyester film 40, and the polybutylene terephthalate film 41 are colorless and transparent to the naked eye, and by being non-oriented, have almost no birefringence and become optically colorless. Does not adversely affect the detection of optical defects.
- Polycarbonate is a carbonate resin derived from bicyclic divalent phenols and phosgene, and is characterized by having a high glass transition point and heat resistance.
- polycarbonate bisphenols, for example, polycarbonates derived from Table 1 are used. Types of Bispheno ⁇
- These polycarbonates may be a homopolymer, a copolymer, or a blend as long as the above conditions are satisfied.
- polarizer 4 a film made of a hydrophilic polymer such as polyvinyl alcohol and the like is used after adsorbing iodine or a dichroic dye and then stretch-oriented.
- iodine is volatilized. It is used without heat setting. Therefore, it expands and contracts greatly due to changes in ambient temperature and humidity. For this reason, it is necessary that the protective finolem 3 for the polarizer, which holds the polarizer 4 and restrains deformation due to temperature and humidity changes, has heat resistance because it is optically transparent. Is done.
- the heat-resistant and moisture-absorbing properties are also required for the polarizing film protective film 1 and the polarizing film release protective film 2 adhered to the outside. It is.
- Polycarbonate has excellent heat resistance, low hygroscopicity, and high mechanical strength, but preferably has a glass transition temperature of 100 ° C or higher, and preferably 150 ° C or higher. More preferred. If the glass transition temperature is less than 100 ° C., the binding force to the polarizer 4 will be insufficient, and the polycarbonate film itself may shrink and the polarizing plate 20 may be warped.
- a film obtained by laminating a thin polyester film 40 on one surface of a polycarbonate film 30 as a base material is used. Since the polycarbonate film 30 cannot be directly thermally bonded to the polarizer 4 film made of a hydrophilic polymer such as polyvinyl alcohol, a polyester film that can be thermally bonded to both the polycarbonate film 30 and the polarizer 4 is used. It is interposed as a thin adhesive layer. Non-oriented polyester films can be thermally bonded to these films at a considerably lower temperature than their melting points.However, for heat bonding at 90 ° C or lower, the polyester melting point is preferably 235 ° C or lower.
- ethylene is especially preferred terephthalate / E switch isophthalate copolymer 1 0-2 5 mol 0/0 containing E Ji isophthalate.
- a * polymer in which part of the alcoholic component of ethylene terephthalate is replaced with cyclohexane dimethanol so that the melting point is not higher than 235 ° C. may be used.
- the protective film 3 for the polarizer is simply formed with the hard coat film 42 as shown in FIG. 5 without covering the protective film 1 via the adhesive 6 as shown in FIG. .
- the retardation film 5 may be bonded to the protective film 3 for a polarizer via the adhesive 43.
- the resin is dissolved in an organic solvent to form a coating, but the non-oriented polycarbonate film as the base material has poor organic solvent resistance, and shrinks or becomes cloudy and opaque when an organic solvent is attached. Become.
- a three-layer film in which a polybutylene terephthalate film 41 is laminated on a surface of the polycarbonate film 30 on which the polyester film 40 is not laminated is used.
- Non-oriented polybutylene terephthalate The tofilm does not shrink even when an organic solvent is attached, and effectively acts as an organic solvent-resistant layer of the polycarbonate film.
- the thickness of the two-layer film is preferably polyester (1 to 10 ⁇ ) ⁇ polycarbonate (10 to 80 ⁇ ).
- the thickness of the three-layer film is preferably polyester (1 to: L0 m) polycarbonate (10 to 80 ⁇ ) ⁇ polyethylene terephthalate (1 to 10 ⁇ ). If the thickness of the polycarbonate film 30 is less than 10 m, even if the polarizer is sandwiched between the three-layer films, deformation of the polarizer due to temperature change or humidity change cannot be sufficiently restrained. If it exceeds 80 ⁇ , the effect of the restraint saturates and becomes economically ineffective.
- the thickness of the polyester film 40 and the thickness of the polybutylene terephthalate film 41 are preferably 1 to 50 to 1Z5, respectively. If the thickness of the polyester film 40 is less than 50, sufficient adhesion between the polycarbonate and the polarizer cannot be obtained. On the other hand, if the thickness of the polybutylene terephthalate film 41 is less than 1/50, the polycarbonate cannot be sufficiently imparted with organic solvent resistance.
- Polyester-polybutylene terephthalate has a much lower glass transition temperature than polycarbonate, so it is easily deformed by changes in temperature and humidity.
- the polarizer 4 and the polyester film 40 The deformation of both of the polyethylene terephthalate films 41 may cause deformation of the two-layer film or the entire three-layer film. Therefore, if the thickness of the polyester film 40 and the polybutylene terephthalate film 41 exceeds 15 each, the restraining effect of the polycarbonate film becomes insufficient, and the film may be deformed by external factors such as temperature change and humidity change. There is.
- the above-mentioned two-layer film and three-layer film can be prepared by using a known film manufacturing method such as a co-extrusion method.
- the two-layer film and the three-layer film are manufactured in a long strip shape, and are wound on a coiler or wound on a coiler. While being unwound from the state, it is adhered to the polarizer 4 and the retardation film 5, but the particle size is 0.1 to 3 for either the polyester film 40 and / or the polybutylene terephthalate film 41, or both.
- a lubricant such as 0.0 m powder of sili powder
- the polarizing plate 20 is formed using the polarizer protective film 3 using the non-oriented two-layer film or three-layer film prepared as described above. That is, when using a two-layer protective film for a polarizer, as shown in FIG. 4, the polarizer 4 is sandwiched between the polarizer protective films 3 so that the polyester film layers are in contact with both surfaces of the polarizer 4, Heat bonding is performed at a temperature of 90 ° C. or less to form a polarizing film 10. In this case, a polyester film layer of a protective film for a polarizer which has been subjected to a corona treatment in order to improve the adhesive strength may be used.
- the polarizing film protective film 1 is adhered to one side of the polarizing film 10 via an adhesive 6, the retardation film 5 is adhered to the other side of the polarizing film 10, and the adhesive 6 is further placed thereon. Then, the release protective film 2 for a polarizing film coated with the release agent 8 is attached so that the release agent 8 is in contact with the adhesive 6.
- a transparent ataryl resin or the like is applied to the polybutylene terephthalate surface of the protective film for polarizer 3 in an organic solvent such as ethyl acetate / methyl ethyl ketone. Dissolve and apply to form a hard coat film 42, and apply the adhesive 43 on one surface of the polarizer 4 and the adhesive 43 on the polybutylene terephthalate surface of the three-layer protective film for polarizer, etc.
- the polarizer 4 is sandwiched between the polarizer protective films 3 so that the polyester film layer is in contact with both surfaces of the polarizer 4 on the other surface of the polarizer 4 after dissolving and coating the organic solvent in the organic solvent. , 90. Bonded at a temperature of C or less to form polarizing film 10 .
- the retardation film 5 is adhered to the side of the polarizing film 10 on which the hard coat film is not formed, and the release protective film 2 for a polarizing film, to which the release agent 8 has been applied via the adhesive 6, is then released. It is applied so that the mold agent 8 comes into contact with the adhesive 6.
- polyethylene terephthalate copolymerized with isophthalic acid containing 25 mol of ethyleneisophthalate, S: 10 ⁇ .
- Polyethylene terephthalate (melting point: 25 ° C, film thickness: 5 zm), polycarbonate (glass transition temperature: 150 ° C, film thickness: 65 ⁇ ) and isophthalic acid copolymer as protective films for polarizers
- a three-layer film (total film thickness: 80 m) made of polyethylene terephthalate (containing 15 mol of ethylene isophthalate, film thickness: 10 ⁇ ) was used.
- Example 2 The same experiment as in Example 1 was performed except that a film (thickness: 80 ⁇ ) was used.
- a two-layer film made of polycarbonate (glass transition temperature: 150 ° C, film thickness: 70 ⁇ ) and polyethylene naphthalate (film thickness: 10 ⁇ m) is used as a protective film for a polarizer.
- the same experiment as in Example 1 was performed, except that Ilum (total film thickness: 80 ⁇ ) was used. The results are shown in Table 1.
- Polyethylene terephthalate (melting point: 222 ° (:, film thickness: 20 ⁇ )), polycarbonate (glass transition temperature: 150 ° C., film thickness: 5 Aim) and iso-protective films for polarizers
- Example 2 Same as Example 1 except that a three-layer film (total film thickness: 80 ⁇ m) composed of phthalic acid copolymerized polyethylene terephthalate (containing 15 mol of ethylene isophthalate, film thickness: 55 ⁇ ) was used.
- a three-layer film composed of phthalic acid copolymerized polyethylene terephthalate (containing 15 mol of ethylene isophthalate, film thickness: 55 ⁇ ) was used.
- total film thickness: 80 ⁇ m composed of phthalic acid copolymerized polyethylene terephthalate (containing 15 mol of ethylene isophthalate, film thickness: 55 ⁇ ) was used.
- the adhesion between the polarizer and the protective film for a polarizer was evaluated by visual observation for the presence or absence of delamination. Further, the sample was cut to a width of 15 mm, and the polarizer and the protective film for a polarizer were pulled in the 180 ° direction, and the strength was measured (measurement of 180 ° peel strength) for evaluation.
- the shape was visually evaluated.
- the unit light transmittance and the degree of polarization were measured with a spectrophotometer (U-410 manufactured by Hitachi, Ltd.).
- the degree of polarization was determined by the following equation.
- T 1 is the light transmittance measured when the two polarizing films are stacked so that the orientation directions of the polarizers are the same
- T 2 is the light transmittance measured when the two polarizing films are oriented in the same direction. It is the light transmittance measured in a state of being overlapped with the father. Table 2 shows the evaluation results. Evaluation
- the protective film for a polarizer used for the polarizing plate of the liquid crystal display device or the like of the present invention is obtained by laminating a polyester film on one surface of a polycarbonate film having a glass transition temperature of 10 ° C. or higher.
- These two-layer films or three-layer films are colorless and transparent to the naked eye and can be directly thermally bonded to the polarizer without using an adhesive, so that a polarizing plate can be manufactured at low cost.
- the two-layer film is obtained by laminating a thin polyester film having a thickness of 1/50 to 1/5 of a polycarbonate film on one side of a polycarbonate film as a base material.
- the three-layer film consists of a polycarbonate film as the base material, a polyester film on one side and a polybutylene terephthalate film on the other side. It is formed by laminating a thin layer having a thickness of 1/5 to 1/5 of a polycarbonate film.
- Polycarbonate has a high glass transition temperature of 100 ° C or higher, and it is difficult to deform due to changes in temperature or humidity, and a polarizer that easily deforms due to these external factors is sandwiched as a protective film for the polarizer.
- non-oriented polycarbonate has poor organic solvent resistance, and shrinks or becomes cloudy and opaque when an organic solvent is attached.
- a thin layer of polyethylene is used as an organic solvent resistant layer.
- a terephthalate film is laminated on one side of a polycarbonate film. With this configuration, the polycarbonate film does not come into direct contact with the organic solvent, so that the polarizer protective film does not shrink or become cloudy.
- the polarizing plate of the present invention is a polarizing film comprising: a polarizing film formed by sandwiching both surfaces of a polarizer with a protective film for a polarizer and thermally bonding the polarizing film to one side of the polarizing film via an adhesive; A retardation film is adhered to the other side, and a release protective film for a polarizing film, on which a release agent is applied via an adhesive, is adhered so that the release agent is in contact with the adhesive.
- a coating step of the adhesive is not required, and the cost is low. Can be manufactured.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
- Liquid Crystal (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002354486A AU2002354486A1 (en) | 2001-12-14 | 2002-12-13 | Preventive film for polarizer and polarizing plate using the same |
AT02788830T ATE466303T1 (de) | 2001-12-14 | 2002-12-13 | Schutzfolie für einen polarisator und polarisierende scheibe, die dieselbe verwendet |
US10/498,252 US7138703B2 (en) | 2001-12-14 | 2002-12-13 | Preventive film for polarizer and polarizing plate using the same |
EP02788830A EP1464994B1 (en) | 2001-12-14 | 2002-12-13 | Preventive film for polarizer and polarizing plate using the same |
KR1020047008907A KR100658416B1 (ko) | 2001-12-14 | 2002-12-13 | 편광자용 보호 필름 및 이것을 사용한 편광판 |
DE60236208T DE60236208D1 (de) | 2001-12-14 | 2002-12-13 | Schutzfolie für einen polarisator und polarisierende scheibe, die dieselbe verwendet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-382321 | 2001-12-14 | ||
JP2001382321A JP2003185833A (ja) | 2001-12-14 | 2001-12-14 | 偏光子用保護フィルムおよびそれを用いた偏光板 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003052469A1 true WO2003052469A1 (fr) | 2003-06-26 |
Family
ID=19187441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/013080 WO2003052469A1 (fr) | 2001-12-14 | 2002-12-13 | Film protecteur pour polariseur et plaque de polarisation comprenant ce dernier |
Country Status (10)
Country | Link |
---|---|
US (1) | US7138703B2 (ja) |
EP (1) | EP1464994B1 (ja) |
JP (1) | JP2003185833A (ja) |
KR (1) | KR100658416B1 (ja) |
CN (1) | CN1271429C (ja) |
AT (1) | ATE466303T1 (ja) |
AU (1) | AU2002354486A1 (ja) |
DE (1) | DE60236208D1 (ja) |
TW (1) | TWI259141B (ja) |
WO (1) | WO2003052469A1 (ja) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7486442B2 (en) | 2004-09-30 | 2009-02-03 | Industrial Technology Research Institute | Polarizer protective film, polarizing plate, and visual display |
JP2007316366A (ja) * | 2006-05-26 | 2007-12-06 | Nippon Shokubai Co Ltd | 偏光子保護フィルム、偏光板、および画像表示装置 |
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- 2002-12-13 AT AT02788830T patent/ATE466303T1/de not_active IP Right Cessation
- 2002-12-13 EP EP02788830A patent/EP1464994B1/en not_active Expired - Lifetime
- 2002-12-13 TW TW091136215A patent/TWI259141B/zh not_active IP Right Cessation
- 2002-12-13 WO PCT/JP2002/013080 patent/WO2003052469A1/ja active Application Filing
- 2002-12-13 DE DE60236208T patent/DE60236208D1/de not_active Expired - Lifetime
- 2002-12-13 CN CNB028266323A patent/CN1271429C/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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KR20040073469A (ko) | 2004-08-19 |
CN1613022A (zh) | 2005-05-04 |
US20050128613A1 (en) | 2005-06-16 |
US7138703B2 (en) | 2006-11-21 |
AU2002354486A1 (en) | 2003-06-30 |
ATE466303T1 (de) | 2010-05-15 |
EP1464994B1 (en) | 2010-04-28 |
CN1271429C (zh) | 2006-08-23 |
KR100658416B1 (ko) | 2006-12-15 |
TWI259141B (en) | 2006-08-01 |
DE60236208D1 (de) | 2010-06-10 |
TW200300728A (en) | 2003-06-16 |
EP1464994A1 (en) | 2004-10-06 |
EP1464994A4 (en) | 2006-03-22 |
JP2003185833A (ja) | 2003-07-03 |
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