CN109983375A - Polarizing film, device used for image display protection board and phase-contrast film - Google Patents
Polarizing film, device used for image display protection board and phase-contrast film Download PDFInfo
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- CN109983375A CN109983375A CN201780068209.3A CN201780068209A CN109983375A CN 109983375 A CN109983375 A CN 109983375A CN 201780068209 A CN201780068209 A CN 201780068209A CN 109983375 A CN109983375 A CN 109983375A
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- layer
- transparent resin
- resin film
- film
- infrared
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/26—Reflecting filters
-
- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
Abstract
Polarizing film successively has in thickness direction side: the 1st transparent resin film, infrared-reflecting layers and polarisation part, infrared-reflecting layers successively have: the 1st inorganic oxide layer, metal layer and the 2nd inorganic oxide layer.
Description
Technical field
The present invention relates to polarizing film, phase-contrast film and device used for image display protection boards, specifically, are related to fitting
Share the polarizing film in optical applications, phase-contrast film and device used for image display protection board.
Background technique
As digital signage, information display, large-scale liquid crystal display is just widely available.These large-scale liquid crystals
Show that device is arranged in outdoor more, therefore for damaged purpose is prevented, surface is provided with the protection boards such as glass plate.Moreover, in order to
Mirroring, reflecting to keep visual recognition good for the exterior light for preventing sunlight etc. strong, is provided with anti-on the surface of protection board
Reflectance coating is (referring to patent document 1.).
However, for outdoor liquid crystal image display device is arranged in, as the unfavorable condition other than the mirroring of exterior light,
The thermal damage as caused by sunlight can be enumerated.That is, being heated excessively to deteriorate there are internal parts such as liquid crystal cells
Unfavorable condition.Therefore, it studies in the surface of protection board setting Infra Red reflective films (referring to patent document 2.).
The Infra Red reflective films of patent document 2 disclose, and successively have in transparent film substrate by the first metal oxygen
The Infra Red reflective films for the infrared-reflecting layers that compound layer, metal layer and the second metal oxide layer are formed.
The Infra Red reflective films of patent document 2 have metal layer, therefore compared with other Infra Red reflective films, meeting
Play good infrared-reflecting power.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 11-258592 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2014-167617 bulletin
Summary of the invention
Problems to be solved by the invention
But there are following unfavorable conditions for the Infra Red reflective films of patent document 2: not only near infrared region (such as 800
The wavelength region of~1600nm) reflection, and visible light, particularly close near infrared region visible light (such as wavelength 600~
The red light of 800nm) also reflect.Therefore, inhibit exterior light there is room for improvement in terms of mirroring.
In addition, thering is water to immerse to patent document 2 if liquid crystal image display device is placed under the moist environments such as rainy day
Infra Red reflective films and protection board between worry.At this point, sometimes (especially golden in the small infrared-reflecting layers of moisture permeability
Belong to layer) and protection board between water be not discharged and water excessively accumulates, as a result, generate sometimes haze inside protection board,
The unfavorable condition that the transparency reduces.In addition, sometimes because the water that excessively accumulates there are due to accelerate the corrosion of metal layer, appearance occurs
Deteriorate.It should be noted that deteriorated appearance caused by the presence of water will not in the Infra Red reflective films being formed of oxide
Occur, is intrinsic project for the Infra Red reflective films for having metal layer.
The object of the present invention is to provide can reflect infrared ray and inhibit exterior light visible light reflection, inhibit
The transparency under moist environment reduces and the device used for image display protection board of the deterioration of appearance, polarizing film and phase difference are thin
Film.
The solution to the problem
Of the invention [1] includes a kind of polarizing film, is successively had in thickness direction side: the 1st transparent resin film, red
Outside line reflecting layer and polarisation part, aforementioned infrared-reflecting layers successively have the 1st inorganic oxide layer, metal layer and the 2nd inorganic oxygen
Compound layer.
Of the invention [2] include polarizing film described in [1], wherein aforementioned infrared-reflecting layers and aforementioned polarisation part it
Between, it is also equipped with 1/4 wavelength layer.
[3] of the invention include polarizing film described in [1] or [2], wherein in aforementioned infrared-reflecting layers and aforementioned polarisation
Be also equipped with the 2nd transparent resin film between part, aforementioned 2nd transparent resin film with a thickness of 10 μm or more and 100 μm or less.
[4] of the invention include polarizing film described in any one of [1]~[3], wherein in the aforementioned thickness of aforementioned polarisation part
Degree direction side is also equipped with the 3rd transparent resin film.
[5] of the invention include polarizing film described in [4], wherein aforementioned 3rd transparent resin film is ultraviolet radiation absorption
Layer.
[6] of the invention include polarizing film described in any one of [1]~[5], wherein thin in aforementioned 1st transparent resin
The 1st adhesive phase is also equipped between film and aforementioned infrared-reflecting layers.
[7] of the invention include polarizing film described in any one of [1]~[6], wherein aforementioned 1st transparent resin film
Moisture permeability be 5g/m2More than for 24 hours.
[8] of the invention include polarizing film described in any one of [1]~[7], wherein aforementioned metal layer is silver layer or silver
Alloy-layer.
[9] of the invention include polarizing film described in any one of [1]~[8], wherein aforementioned 1st inorganic oxide layer
And aforementioned 2nd inorganic oxide layer contains indium system oxide.
[10] of the invention include a kind of device used for image display protection board, are had: described in any one of [1]~[9]
Polarizing film, be set to aforementioned polarizing film aforementioned thicknesses direction side the 2nd adhesive phase and to be set to the aforementioned 2nd viscous
The transparent protection plate of the aforementioned thicknesses direction side of mixture layer.
Of the invention [11] include a kind of phase-contrast film, thickness direction side successively have the 1st transparent resin film,
Infrared-reflecting layers and 1/4 wavelength layer, aforementioned infrared-reflecting layers successively have the 1st inorganic oxide layer, metal layer and the 2nd nothing
Machine oxide skin(coating).
Of the invention [12] include phase-contrast film described in [11], wherein it is also equipped with the 2nd transparent resin film, the aforementioned 2nd
Transparent resin film with a thickness of 10 μm or more and 100 μm or less.
[13] of the invention include phase-contrast film described in any one of [11] or [12], which is characterized in that the aforementioned 1st
The 1st adhesive phase is also equipped between transparent resin film and aforementioned infrared-reflecting layers.
The effect of invention
According to the device used for image display protection board of the invention for having polarizing film and phase-contrast film of the invention, energy
Enough reflect infrared ray.Therefore, the temperature for being able to suppress the internal part of image display device rises, to reduce image display dress
The deterioration set.
In addition, mirroring for exterior light can be reduced due to the reflection for the visible light for being able to suppress exterior light.
In addition, being able to suppress hazing for device used for image display protection board under moist environment, therefore it is able to maintain that transparent
Property.In addition, the burn into for being able to suppress metal layer is able to maintain that good appearance under moist environment.
Detailed description of the invention
Fig. 1 shows the side view of an embodiment of polarizing film.
Fig. 2 shows the side views for the protection board for having polarizing film shown in FIG. 1.
Fig. 3 shows the side view of the variation (embodiment for having exchanged each layer) of polarizing film.
Fig. 4 shows the variation (embodiment for not having the 3rd adhesive phase and the 2nd transparent resin film) of polarizing film
Side view.
The variation that Fig. 5 shows polarizing film (does not have the 3rd adhesive phase, the 2nd 1/4 wavelength layer and the 4th adhesive layer
Embodiment) side view.
The variation that Fig. 6 shows polarizing film (does not have the 3rd adhesive phase, the 2nd transparent resin film, the 2nd 1/4 wavelength
Layer and the 4th adhesive layer embodiment) side view.
The variation that Fig. 7 shows polarizing film (does not have the 1st adhesive phase, the 2nd transparent resin film, the 2nd 1/4 wavelength
Layer and the 4th adhesive layer embodiment) side view.
Fig. 8 show polarizing film variation (do not have the 1st adhesive phase, the one 1/4 wavelength layer, the 3rd adhesive phase,
The embodiment of 2nd transparent resin film, the 2nd 1/4 wavelength layer, the 4th adhesive layer and the 3rd transparent resin film) side view.
Fig. 9 shows the side view of the polarizing film of comparative example.
Figure 10 illustrates that the figure of the relationship of the measurement wavelength and light reflectivity that measure in embodiment.
Specific embodiment
1. polarizing film
An embodiment of polarizing film 1 of the invention is illustrated referring to Fig.1.
In Fig. 1, paper up and down direction is up and down direction (thickness direction, the 1st direction), is upside (thickness side on the upside of paper
To side, the 1st direction side), paper downside is downside (the thickness direction other side, the 1st direction other side).In addition, paper is left
Right direction and depth direction are the face direction orthogonal with up and down direction.Specifically, on the basis of the direction arrow of each figure.
Polarizing film 1 forms the thin film shape (including plate shape) with specific thickness, along the face orthogonal with thickness direction
Direction extends, and has flat upper surface and flat lower surface (2 main surfaces).Polarizing film 1 is, for example, to be contained in image
One component of display device (liquid crystal image display device etc.), that is, be not image display device.That is, polarizing film 1 be for
The component of image display device etc. is made, for without the light sources such as the image-displaying members such as liquid crystal cells 19, LED 20 and with itself stream
Available device in logical industry.
Specifically, as shown in Figure 1, polarizing film 1 successively has: the 1st transparent resin film 2, the 1st adhesive phase 3, red
Outside line reflecting layer 4, the one 1/4 wavelength layer 5, the 3rd adhesive phase 6, the 2nd transparent resin film 7, polarisation part 8, the 2nd 1/4 wavelength
The 9, the 4th adhesive phase 10 of layer and the 3rd transparent resin film 11.It is preferred that polarizing film 1 is only glued by the 1st transparent resin film the 2, the 1st
Mixture layer 3, infrared-reflecting layers 4, the one 1/4 wavelength layer 5, the 3rd adhesive phase 6, the 2nd transparent resin film 7, polarisation part 8,
2 1/4 wavelength layers 9, the 4th adhesive phase 10 and the 3rd transparent resin film 11 are constituted.Each layer is described in detail below.
(the 1st transparent resin film)
1st transparent resin film 2 is the lowest level of polarizing film 1, for the branch for ensuring the mechanical strength of polarizing film 1
Timbering material.In addition, the 1st transparent resin film 2 is for making to immerse to polarizing film 1 or device used for image display protection board 18
The water in portion penetrates and is discharged to the water transmission layer of 1 outside of polarizing film (being downside in Fig. 1).
1st transparent resin film 2 has the transparency, flexible and penetrability.
As the material for constituting the 1st transparent resin film 2, the cellulose such as cellulose triacetate (TAC) can be enumerated
Resin, such as acrylic resin, phenyl maleimide resins, gathers the cyclic polyolefin resin such as cyclic olefin polymer
Carbonate resin, polyester resin, polyimide resin, polyamide, polystyrene resin etc..These materials can individually make
With or two or more is applied in combination.From viewpoints such as the transparency, mechanical strength, penetrability, optical isotropies, can preferably arrange
Cyclic polyolefin resin, celluosic resin are enumerated, celluosic resin can be more preferably enumerated, can further preferably enumerate TAC.
In addition, the 1st transparent resin film 2 can contain additive well known to aftermentioned ultraviolet absorbing agent etc..
It should be noted that the 1st transparent resin film 2 does not preferably have delay (retardation) substantially.Substantially
Refer to without delay, the delay under wavelength 550nm is, for example, 20nm hereinafter, preferably 10nm or less, more excellent in thickness direction
It is selected as 5nm or less, further preferably 0nm.
The thickness of 1st transparent resin film 2 is, for example, 5 μm or more, and preferably 10 μm or more, more preferably 20 μm or more,
In addition, for example, 300 μm hereinafter, preferably 200 μm or less, more preferably 100 μm or less.
It should be noted that the thickness of each layer such as the 1st transparent resin film 2 (except infrared-reflecting layers 4) for example can be with
It is measured using film thickness gauge (Peacock corporation, " digital dial gauge DG-205 ").Alternatively, it is also possible to by obtaining and observing
Cross-sectional SEM image measures thickness.
The moisture permeability of 1st transparent resin film 2 is, for example, 5g/m2More than for 24 hours, preferably 10g/m2More than for 24 hours, more
Preferably 30g/m2Above for 24 hours, further preferably 50g/m2Above for 24 hours, particularly preferably 100g/m2More than for 24 hours,
In addition, for example, 5000g/m2For 24 hours hereinafter, preferably 3000g/m2Following for 24 hours, more preferably 1500g/m2For 24 hours with
Under, further preferably 1000g/m2Following for 24 hours, particularly preferably 800g/m2It is following for 24 hours.By the way that moisture permeability is set as
Lower limit or more is stated, so as to quickly immerse to the water inside polarizing film 1, particularly immerse to the 1st transparent resin film 2
Water between infrared-reflecting layers 4 is discharged to the outside, and is able to suppress the accumulation of the water between them.As a result, it is possible to inhibit
The hazing of polarizing film 1, the corrosion of metal layer 13.On the other hand, by moisture permeability is set as the above-mentioned upper limit hereinafter, so as to
It prevents water from exceedingly immersing between the 1st transparent resin film 2 and infrared-reflecting layers 4, is able to suppress the corrosion of metal layer 13.
Moisture permeability can be for example measured by the test according to JIS K 7129:2008 Appendix B.Specifically, logical
The measurement device " PERMATRANW3/33 " using MOCON corporation is crossed to find out, experimental condition is 40 DEG C, relative humidity
90%.
In addition, can implement to be surface-treated to the lower surface of the 1st transparent resin film 2 as needed.As surface treatment,
Can be implemented the etching process such as sputtering, corona discharge, flame, ultraviolet light irradiation, electron beam irradiation, chemical conversion, oxidation,
Primary coat processing.Alternatively, it is also possible to be dusted, cleaned to the 1st transparent resin film 2 by solvent cleaning, ultrasonic cleaning etc.
Change.
(the 1st adhesive phase)
1st adhesive phase 3 is for the 1st transparent resin film 2 and infrared-reflecting layers 4 to be bonded, and thoroughly by the 1st
Ming tree membrane of lipoprotein 2 or the water on the surface that will be present in infrared-reflecting layers 4 by the end of the 1st adhesive phase 3 are discharged to the outside
Layer.1st adhesive phase 3 has thin film shape (including plate shape), with what is contacted with the upper surface of the 1st transparent resin film 2
Mode is configured at the upper surface whole face of the 1st transparent resin film 2.
1st adhesive phase 3 is prepared by adhesive composition.The composition of adhesive composition does not limit, for example, can arrange
Enumerate acrylic adhesive, elastomeric adhesive (butyl rubber etc.), organic silicon-type adhesive, Polyester adhesive, poly- ammonia
Ester system adhesive, polyamide-based adhesive, epoxy adhesive, vinyl alkyl ethers system adhesive, fluororesin system adhesive etc.,
From the viewpoint of cementability, penetrability, acrylic adhesive can be preferably enumerated.
Adhesive composition can for example contain filler, antioxidant, softening agent, thixotropic agent, lubricant, pigment, prevent
The additives such as burnt agent, stabilizer, ultraviolet absorbing agent, colorant, mould inhibitor, fire retardant.
Adhesive composition preferably comprises antioxidant.Antioxidant does not limit, and can preferably enumerate enumerate BTA system
Compound.As benzotriazole based compound, for example, 1,2,3- benzotriazole, 5- methyl-1 H- benzotriazole, 4- can be enumerated
Methylbenzotrazole, nitrobenzene and triazolam system etc..Antioxidant is, for example, 0.01 matter relative to the content of adhesive composition
Measure % or more and 10 mass % or less.
The thickness of 1st adhesive phase 3 is, for example, 1 μm or more, and preferably 5 μm or more, more preferably 10 μm or more, in addition,
For example, 300 μm hereinafter, preferably 150 μm or less, more preferably 50 μm or less.By the way that the thickness of the 1st adhesive phase 3 is set as
More than above-mentioned lower limit, so that zygosity is excellent.In addition, by the thickness of the 1st adhesive phase 3 is set as the above-mentioned upper limit hereinafter, from
And treatability is excellent.
Film thickness gauge (Peacock corporation, " number thousand can be used for example in the thickness of the adhesive phases such as the 1st adhesive phase 3
Point table DG-205 ") it measures.Alternatively, it is also possible to measure thickness by obtaining and observing cross-sectional SEM image.
(infrared-reflecting layers)
Infrared-reflecting layers 4 are for that will be incident to the infrared reflection of polarizing film 1 and make the layer of visible light-transmissive.
Infrared-reflecting layers 4 have thin film shape (including plate shape), with what is contacted with the upper surface of the 1st adhesive phase 3
Mode is configured at the upper surface whole face of the 1st adhesive phase 3.
Infrared-reflecting layers 4 successively have from lower section: the 1st inorganic oxide layer 12, metal layer 13 and the 2nd inorganic oxide
Nitride layer 14.That is, infrared-reflecting layers 4 have: being configured at the 1st inorganic oxide layer 12 of the upside of the 1st adhesive phase 3, match
It is placed in the metal layer 13 of the upside of the 1st inorganic oxide layer 12 and is configured at the 2nd inorganic oxide layer of the upside of metal layer 13
14.In addition, infrared-reflecting layers 4 are preferably only by the 1st inorganic oxide layer 12,14 structure of metal layer 13 and the 2nd inorganic oxide layer
At.
The thickness of infrared-reflecting layers 4, i.e. the 1st inorganic oxide layer 12, metal layer 13 and the 2nd inorganic oxide layer 14
Overall thickness is, for example, 20nm or more, preferably 60nm or more, in addition, for example, 150nm hereinafter, preferably 120 μm or less, it is more excellent
It is selected as 100nm or less.
(the 1st inorganic oxide layer)
1st inorganic oxide layer 12 be for aftermentioned 2nd inorganic oxide layer 14 inhibit metal layer 13 together can
The optical adjustment layer of the light-exposed visible light transmittance for reflecting, improving infrared-reflecting layers 4.
In addition, being also the ingredients intrusions such as hydrogen, carbon for preventing the 1st transparent resin film 2, containing in the 1st adhesive phase 3
To the barrier layer of the deterioration of metal layer 13 caused by metal layer 13.
1st inorganic oxide layer 12 is the lowest level in infrared-reflecting layers 4, has thin film shape (including plate shape),
The upper surface whole face of the 1st adhesive phase 3 is configured in a manner of contacting with the upper surface of the 1st adhesive phase 3.
As formed the 1st inorganic oxide layer 12 inorganic oxide, for example, can enumerate by selected from by In, Sn, Zn,
At least one kind of metal in the group of Ga, Sb, Ti, Si, Zr, Mg, Al, Au, Ag, Cu, Pd, W, Fe, Pb, Ni, Nb, Cr composition is formed
Metal oxide etc..As needed, can further adulterate above-mentioned group in metal oxide shown in metallic atom.
As inorganic oxide, from the viewpoint of ensuring the excellent transparency, can preferably enumerate containing indium oxide
Oxide (indium system oxide), can more preferably enumerate indium tin composite oxides (ITO)." ITO " in this explanation is as long as extremely
Less include the composite oxides of indium (In) and tin (Sn), may include the addition ingredient in addition to them.As it is additional at
Point, such as the metallic element in addition to In, Sn can be enumerated, for example, metallic element shown in above-mentioned group can be enumerated and they
Combination.The content of additional ingredient is not particularly limited, for example, 5 mass % or less.
Tin oxide (the SnO contained in ITO2) content relative to tin oxide and indium oxide (In2O3) total amount be, for example,
0.5 mass % or more, preferably 3 mass % or more, in addition, for example, 35 mass % are hereinafter, preferably 20 mass % or less.Oxygen
Change the content (In of indium2O3) it is tin oxide (SnO2) content remainder.Pass through the tin oxide (SnO that will contain in ITO2)
Content be set as above range, so as to adjust the crystallinity of ito film.
In addition or noncrystalline 1st inorganic oxide layer 12 can be crystalline,.Preferably noncrystalline.As a result, can
Enough reduce the unfavorable condition in manufacturing process (for example, heating process for obtaining crystalline).
The thickness of 1st inorganic oxide layer 12 is, for example, 5nm or more, preferably 20nm or more, in addition, for example, 100nm
Hereinafter, preferably 60nm or less.1st inorganic oxide layer 12 with a thickness of above range when, be easy with high level adjust it is infrared
The visible light transmittance of line reflection layer 4.The thickness of 1st inorganic oxide layer 12 for example can be by micro- based on transmission electron
The cross-section observation of mirror (TEM) measures.
(metal layer)
Metal layer 13 be for reflect infrared ray and with the 1st inorganic oxide layer 12 and the 2nd inorganic oxide layer 14 1
Act the layer for assigning transparent (visible light permeability).
Metal layer 13 has thin film shape (including plate shape), with what is contacted with the upper surface of the 1st inorganic oxide layer 12
Mode is configured at the upper surface of the 1st inorganic oxide layer 12.
As long as the metal for forming metal layer 13 is that there is no limit for the high metal of the reflectivity of infrared ray, for example, can enumerate
Out comprising selected from by Ti, Si, Nb, In, Zn, Sn, Au, Ag, Cu, Al, Co, Cr, Ni, Pb, Pd, Pt, Cu, Ge, Ru, Nd, Mg,
1 kind of metal in the group of Ca, Na, W, Zr, Ta and Hf composition or the alloy containing two or more metal in these.
As metal, from the viewpoint of playing excellent infrared reflectivity, silver-colored (Ag) can be preferably enumerated, silver closes
Gold can more preferably enumerate silver alloy.
Silver alloy contains silver as principal component, and contains other metals as accessory ingredient.The metallic element of accessory ingredient does not have
It limits.As silver alloy, closed for example, Ag-Cu alloy, Ag-Pd alloy, Ag-Pd-Cu alloy, Ag-Pd-Cu-Ge can be enumerated
Gold, Ag-Cu-Au alloy, Ag-Cu-In alloy, Ag-Cu-Sn alloy, Ag-Ru-Cu alloy, Ag-Ru-Au alloy, Ag-Nd are closed
Gold, Ag-Mg alloy, Ag-Ca alloy, Ag-Na alloy, Ag-Ni alloy, Ag-Ti alloy, Ag-In alloy, Ag-Sn alloy etc..From
From the perspective of durability, as silver alloy, can preferably enumerate Ag-Cu alloy, Ag-Cu-In alloy, Ag-Cu-Sn alloy,
Ag-Pd alloy, Ag-Pd-Cu alloy etc..
The content ratio of silver in silver alloy is, for example, 80 mass % or more, preferably 90 mass % or more, in addition, for example
For 99.9 mass % or less.The content ratio of other metals in silver alloy is the remainder of the content ratio of above-mentioned silver.
From the viewpoint of infrared reflectivity and the transparency, the thickness of metal layer 13 is, for example, 1nm or more, preferably
5nm or more, more preferably 10nm or more, further preferably 14nm or more, in addition, for example, 80nm is hereinafter, preferably 30nm
Below, 25nm or less, further preferably 20nm or less, particularly preferably 15nm or less are more preferably.Especially metal layer 13
With a thickness of under 14nm or more and 80nm situation below, the deterioration of caused appearance under moist environment can be further suppressed.
The thickness of metal layer 13 for example can be by being measured based on the cross-section observation of transmission electron microscope (TEM).
(the 2nd inorganic oxide layer)
2nd inorganic oxide layer 14 is for inhibiting the visible light of metal layer 13 anti-together with the 1st inorganic oxide layer 12
Penetrate the optical adjustment layer of rate, the visible light transmittance for improving infrared-reflecting layers 4.In addition, the 2nd inorganic oxide layer 14 be for
It prevents by the intrusion such as external oxygen, moisture to the barrier layer of the deterioration of metal layer 13 caused by metal layer 13.
2nd inorganic oxide layer 14 is the top layer in infrared-reflecting layers 4, has thin film shape (including plate shape),
The upper surface whole face of metal layer 13 is configured in a manner of contacting with the upper surface of metal layer 13.
The inorganic oxide for forming the 2nd inorganic oxide layer 14 can be enumerated to be exemplified in the 1st inorganic oxide layer 12
Inorganic oxide, preferably comprise indium oxide, more preferably formed by ITO.
In the case that 2nd inorganic oxide layer 14 is formed by ITO, the tin oxide (SnO that contains in ITO2) content and the 1st
Inorganic oxide layer 12 is same.
In addition or noncrystalline 2nd inorganic oxide layer 14 can be crystalline,.From manufacturing process can be reduced
From the perspective of unfavorable condition on (for example, for obtaining high fever heating process of crystalline), preferably noncrystalline.In addition,
From the viewpoint of moisture-proof, the half hitch crystalloid of crystal grain is included preferably in amorphous film.
The thickness of 2nd inorganic oxide layer 14 is, for example, 5nm or more, preferably 20nm or more, in addition, for example, 100nm
Hereinafter, preferably 60nm or less.2nd inorganic oxide layer 14 with a thickness of above range when, be easy with high level adjust it is infrared
The visible light transmittance of line reflection layer 4.The thickness of 2nd inorganic oxide layer 14 for example can be by micro- based on transmission electron
The cross-section observation of mirror (TEM) measures.
Ratio (T2/T1) example of the thickness T2 of 2nd inorganic oxide layer 14 relative to the thickness T1 of the 1st inorganic oxide layer 12
For example 0.5 or more, preferably 0.75 or more, in addition, for example, 1.5 hereinafter, preferably 1.25 or less.It is above-mentioned than (T2/T1)
When range, the deterioration of the metal layer 13 under moist environment can be further suppressed.
The thickness T2 of 2nd inorganic oxide layer 14 relative to the ratio (T2/T3) of the thickness T3 of metal layer 13 be, for example, 1.5 with
On, preferably 2.0 or more, more preferably 3.0 or more, in addition, for example, 10 hereinafter, preferably 4.0 or less.
(the one 1/4 wavelength layer)
One 1/4 wavelength layer 5 is for will be converted to approximate rotatory polarization by the linear polarization of aftermentioned polarisation part 8
Layer.
One 1/4 wavelength layer 5 has thin film shape (including plate shape), to contact with the upper surface of infrared-reflecting layers 4
Mode be configured at the upper surface whole faces of infrared-reflecting layers 4.
One 1/4 wavelength layer 5 is in the range that the delay of wavelength 550nm is, for example, 137.5nm ± 40nm, preferably
The range of the range of 137.5nm ± 20nm, more preferably 137.5nm ± 10nm.
In addition, the slow-axis direction of the one 1/4 wavelength layer 5 is, for example, 45 ° relative to the angle of the absorption axis direction of polarisation part 8
± 10 ° of range, preferably 45 ° ± 2 of range.
As the one 1/4 wavelength layer 5, specifically, can enumerate resin film is stretched made of oriented film, to liquid
Crystalline polymer carries out film made of orientation process etc..As the material of resin film, the rings such as cyclic olefin polymer can be enumerated
Shape polyolefin resin, polycarbonate resin etc..
The thickness of one 1/4 wavelength layer 5 is, for example, 3 μm or more, preferably 10 μm or more, in addition, for example, for 300 μm with
Under, preferably 100 μm or less.
(the 3rd adhesive phase)
3rd adhesive phase 6 is the layer for the one 1/4 wavelength layer 5 and the 2nd transparent resin film 7 to be bonded.
3rd adhesive phase 6 has thin film shape (including plate shape), with what is contacted with the upper surface of the one 1/4 wavelength layer 5
Mode is configured at the upper surface whole face of the one 1/4 wavelength layer 5.
3rd adhesive phase 6 is prepared by adhesive composition.Adhesive composition can for example enumerate above viscous the 1st
The adhesive composition described in mixture layer 3 can preferably enumerate acrylic adhesive.
The thickness of 3rd adhesive phase 6 is, for example, 1 μm or more, and preferably 5 μm or more, in addition, for example, 300 μm hereinafter, excellent
It is selected as 150 μm or less, more preferably 50 μm or less.By the way that the thickness of the 3rd adhesive phase 6 is set as above-mentioned lower limit or more, thus
Zygosity is excellent.In addition, by the way that the thickness of the 3rd adhesive phase 6 is set as the above-mentioned upper limit hereinafter, to excellent moisture permeability.
(the 2nd transparent resin film)
2nd transparent resin film 7 is the layer for being used to support polarisation part 8 (aftermentioned).In addition, also for by making in polarisation part 8
The water dispersion contained is in 7 inside of the 2nd transparent resin film or makes polarisation part 8 by reducing heat inside the 2nd transparent resin film 7
The rotten layer of polarisation part 8 under environment.In addition, also for for by expand infrared-reflecting layers 4 and transparent protection plate 17 (after
State) distance and the water dispersion that accumulates 4 surface of infrared-reflecting layers inside the 2nd transparent resin film 7 or make infrared
4 surface of line reflection layer accumulate water by the end of the 2nd transparent resin film 7 carry out water removal to inhibit haze, metal layer
The layer of 13 corrosion.
2nd transparent resin film 7 has thin film shape (including plate shape), to contact with the upper surface of the 3rd adhesive phase 6
Mode be configured at the upper surface whole face of the 3rd adhesive phase 6.
The material for constituting the 2nd transparent resin film 7 can enumerate the above material described in the 1st transparent resin film 2,
It is preferred that cyclic polyolefin resin, celluosic resin can be enumerated, celluosic resin can be more preferably enumerated, can further preferably be arranged
Enumerate TAC.
In addition, the 2nd transparent resin film 7 can contain additive well known to aftermentioned ultraviolet absorbing agent etc..
The thickness of 2nd transparent resin film 7 is, for example, 3 μm or more, preferably 10 μm or more, in addition, for example, 200 μm with
Under, preferably 100 μm or less.By the way that the thickness of the 2nd transparent resin film 7 is set as above-mentioned lower limit or more, to have support
The function of polarisation part 8.In addition, by the way that thickness is set as the above-mentioned upper limit hereinafter, being easy suppression so as to keep sufficient penetrability
Heat the rotten of the polarisation part 8 under environment.
The moisture permeability of 2nd transparent resin film 7 is, for example, 5g/m2More than for 24 hours, preferably 10g/m2More than for 24 hours, more
Preferably 30g/m2Above for 24 hours, further preferably 50g/m2Above for 24 hours, particularly preferably 100g/m2More than for 24 hours,
In addition, for example, 5000g/m2For 24 hours hereinafter, preferably 3000g/m2Following for 24 hours, more preferably 1500g/m2For 24 hours with
Under, further preferably 1000g/m2Following for 24 hours, particularly preferably 800g/m2It is following for 24 hours.By by the 2nd transparent resin
The moisture permeability of film 7 is set as above range, so as to efficiently reduce the rotten of the polarisation part 8 under thermal environment.
(polarisation part)
Polarisation part 8 is the layer for converting light to linear polarization.
Polarisation part 8 has thin film shape (including plate shape), with the side contacted with the upper surface of the 2nd transparent resin film 7
Formula is configured at the upper surface whole face of the 2nd transparent resin film 7.
As polarisation part 8, for example, dichroic substance of sening as an envoy to (iodine, dichroic dye) can be enumerated, to be adsorbed in polyvinyl alcohol thin
Film (PVA), vinyl-vinyl acetate copolymer pastern are thin made of dividing the hydrophilic resins such as saponified film membrane of lipoprotein and being uniaxially stretched
Film etc..In addition, the polyethylene-based films such as the dehydration treatment of polyvinyl alcohol, the dehydrochlorinated products of polyvinyl chloride can also be enumerated
Deng.
The thickness of polarisation part 8 is, for example, 1 μm or more, and preferably 3 μm or more, more preferably 5 μm or more, in addition, being, for example,
200 μm hereinafter, preferably 100 μm or less, more preferably 50 μm or less, further preferably 30 μm or less.
(the 2nd 1/4 wavelength layer)
2nd 1/4 wavelength layer 9 is for projecting the light for being incident to polarisation part 8 from light source 20 in the form of rotatory polarization
Layer.
2nd 1/4 wavelength layer 9 has thin film shape (including plate shape), in a manner of contacting with the upper surface of polarisation part 8
It is configured at the upper surface whole face of polarisation part 8.
As long as the 2nd 1/4 wavelength layer 9 will be converted to approximate rotatory polarization by the linear polarization of polarisation part 8, can enumerate
Layer same as the one 1/4 wavelength layer 5 out.
(the 4th adhesive phase)
4th adhesive phase 10 is the layer for the 2nd 1/4 wavelength layer 9 and the 3rd transparent resin film 11 to be bonded.
4th adhesive phase 10 has thin film shape (including plate shape), to contact with the upper surface of the 2nd 1/4 wavelength layer 9
Mode be configured at the upper surface whole face of the 2nd 1/4 wavelength layer 9.
4th adhesive phase 10 is prepared by adhesive composition.Adhesive composition can for example enumerate above viscous the 1st
Mixture layer 3 can preferably enumerate acrylic adhesive in the adhesive composition of middle narration.
The thickness of 4th adhesive phase 10 is, for example, 1 μm or more, preferably 5 μm or more, in addition, for example, 300 μm hereinafter,
Preferably 150 μm or less, more preferably 50 μm or less.
(the 3rd transparent resin film)
3rd transparent resin film 11 is to inhale for absorbing the ultraviolet light of the ultraviolet light of exterior light, the deterioration for reducing polarisation part 8
Receive layer.
3rd transparent resin film 11 is the top layer of polarizing film 1, has thin film shape (include plate shape), with the 4th
The mode of the upper surface contact of adhesive phase 10 is configured at the upper surface whole face of the 4th adhesive phase 10.
3rd transparent resin film 11 has ultraviolet-absorbing.Specifically, for example containing transparent resin film and ultraviolet
Light absorbers.
The material for constituting transparent resin film can enumerate the above material described in the 1st transparent resin film 2, preferably
Celluosic resin can be enumerated, TAC etc. can be more preferably enumerated.
The material of ultraviolet absorbing agent does not limit, for example, benzotriazole based compound, hydroxyphenyltriazinuv can be enumerated
Based compound, benzophenone based compound, salicylate based compound, cyanoacrylate based compound, nickel complex salt system
Close object etc..
The content of ultraviolet absorbing agent is, for example, 0.001 mass % or more relative to 11 total amount of the 3rd transparent resin film, excellent
It is selected as 0.1 mass % or more, in addition, for example, 20 mass % are hereinafter, preferably 5 mass % or less.
3rd transparent resin film 11 does not preferably have delay substantially.
The thickness of 3rd transparent resin film 11 is, for example, 1 μm or more, and preferably 5 μm or more, more preferably 10 μm or more,
In addition, for example, 300 μm hereinafter, preferably 100 μm or less, more preferably 70 μm or less.
(manufacturing method of polarizing film)
Then, the method for manufacture polarizing film 1 is illustrated.When manufacturing polarizing film 1, for example, according to above-mentioned suitable
Sequence configures (stacking) above-mentioned each layer.
For example, especially preparing (1) the 1st transparent resin film 2 respectively, (2) include infrared-reflecting layers 4 and the 1st
1st laminated body of wavelength layer 5, (3) include the 2nd stacking of the 2nd transparent resin film 7, polarisation part 8 and the 2nd 1/4 wavelength layer 9
Body, (4) the 3rd transparent resin films 11, by adhesive phase (the 1st adhesive phase 3, the 3rd adhesive phase 6, the 4th adhesive phase 10)
Configure them.
Known or commercially available object also can be used in 1st transparent resin film 2, the 2nd laminated body and the 3rd transparent resin film 11
Matter.
For the 1st laminated body, for example, infrared-reflecting layers 4 are laminated in known or commercially available one 1/4 wave by dry type
One face of long layer 5.
Specifically, by dry type successively by the 2nd inorganic oxide layer 14, metal layer 13 and the 1st inorganic oxide layer 12
It is respectively arranged at a face of the one 1/4 wavelength layer 5.
As dry type, for example, vacuum vapour deposition, sputtering method, ion plating method etc. can be enumerated.It is preferred that sputtering can be enumerated
Method.Specifically, magnetron sputtering method can be enumerated.
As gas used in sputtering method, such as the non-active gas such as Ar can be enumerated.In addition, as needed, it can be with
Oxygen isoreactivity gas is applied in combination.In the case where reactant gas is applied in combination, the flow-rate ratio of reactant gas is not special
It limits, is, for example, 0.1/100 or more, preferably 1/ based on the ratio of the flow of non-active gas by the flow of reactant gas
100 or more, in addition, for example, 5/100 or less.
Specifically, in the formation of the 1st inorganic oxide layer 12 and the 2nd inorganic oxide layer 14, as gas, preferably
Non-active gas and reactant gas is applied in combination.In the formation of metal layer 13, as gas, preferably it is used alone nonactive
Gas.
In the case where using sputtering method, as target, the above-mentioned inorganic oxide or metal for constituting each layer can be enumerated.
Power supply used in sputtering method does not limit, for example, the list of DC power supply, MF/AC power supply and RF power supply can be enumerated
It solely uses or is applied in combination, can preferably enumerate DC power supply.
It is formed as a result, in a face of the one 1/4 wavelength layer 5 and is sequentially formed with the 2nd inorganic oxide layer 14, metal layer 13
And the 1st inorganic oxide layer 12 infrared-reflecting layers 4, obtain the 1st laminated body.
It should be noted that the 1st inorganic oxide layer 12 and the 2nd inorganic oxide layer 14 that are obtained by dry type are amorphous
Matter.Therefore, as needed, in order to make they crystallize, it is possible to implement heat treatment.
Then, each film and laminated body are configured by adhesive phase.
The adhesive composition of liquid for example can be by being coated on a face of each film or laminated body by adhesive phase
And it makes it dry to configure, or the adhesive composition (adhesive phase) of sheet can also be directly configured at each film or layer
One face of stack.
Polarizing film 1 is obtained as a result,.
The overall thickness of polarizing film 1 is, for example, 2 μm or more, and preferably 20 μm or more, more preferably 50 μm or more, further
Preferably 100 μm or more, in addition, for example, 1000 μm hereinafter, preferably 500 μm or less, more preferably 300 μm or less, into one
Preferably 200 μm or less, particularly preferably 150 μm or less of step.
For the polarizing film 1, the average reflectance of the near infrared ray of 800~1600nm of wavelength is, for example, 10% or more,
Preferably 20% or more, it is more preferably 30% or more, in addition, for example, 100% or less.
The visible light transmittance of polarizing film 1 is, for example, 60% or more, preferably 80% or more, more preferably 85% with
On, in addition, for example, 95% or less.
(function and effect)
The polarizing film 1 successively has the 1st transparent resin film 2, infrared-reflecting layers 4 and polarisation part 8.In addition, infrared
Line reflection layer 4 successively has the 1st inorganic oxide layer 12, metal layer 13 and the 2nd inorganic oxide layer 14.
Therefore, the reflectivity of the near infrared range (special 800~1600nm) of metal layer 13 is excellent, therefore can inhibit outer
The temperature of internal part caused by portion's light (liquid crystal cells 19 etc.) rises to reduce the deterioration of image display device.
In addition, the polarizing film 1 is also able to suppress the visible light (example near visible light region, particularly infrared spectral range
Such as the reflected light of 600~800nm).Specifically, for infrared-reflecting layers 4, the visible light of nearly outside line areas adjacent (such as
600~800nm) light can also reflect on a small quantity.But for the polarizing film 1, in image display device, infrared reflection
Layer 4 is configured at than polarisation part 8 closer to 19 side of liquid crystal cells (side opposite with protection board 18), therefore in infrared-reflecting layers
It is reflected in 4 and back to the exterior light of visual recognition side by polarisation part 8, a part of absorbed straight line for becoming light is inclined
Light.Therefore, the exterior light back to visual recognition side is reduced, and can reduce mirroring for exterior light.In addition, in the one 1/4 wavelength
Layer 5 is configured in the polarizing film 1 between polarisation part 8 and infrared-reflecting layers 4, is reflected and is returned in infrared-reflecting layers 4
The exterior light for returning to visual recognition side is absorbed by polarisation part 8, will not inject to visual recognition side.Therefore, source can be greatly decreased
From the red sense of the reflected light of infrared-reflecting layers 4.
In addition, since infrared-reflecting layers 4 are laminated in the 1st transparent resin film 2, it can be by the 1st transparent resin
Film 2, which will be immersed to the water near infrared-reflecting layers 4, to be moderately discharged to the outside.Therefore, it is able to suppress rising for polarizing film 1
The corrosion of mist, metal layer 13.Therefore, it is able to maintain that the transparency of polarizing film 1.
Especially the moisture permeability of the 1st transparent resin film 2 is 5g/m2When above for 24 hours, more reliably water can be arranged
Outside is arrived out.Therefore, the hazing of polarizing film 1, the corrosion of metal layer 13 can be further suppressed.
In addition, having the 2nd transparent resin film 7 between infrared-reflecting layers 4 and polarisation part 8.Moreover, especially this
2 transparent resin films 7 with a thickness of 10 μm or more and 100 μm or less when, generated between infrared-reflecting layers 4 and polarisation part 8
It can make the space (the 2nd transparent resin film 7) of water dispersion, therefore hazing for polarizing film 1 can be further suppressed.
In addition, polarizing film 1 is also equipped with the one 1/4 wavelength layer 5 between infrared-reflecting layers 4 and polarisation part 8.Therefore,
Mirroring for exterior light can more reliably be inhibited.Specifically, exterior light is turned using polarisation part 8 and the one 1/4 wavelength layer 5
It is changed to rotatory polarization.Then, rotatory polarization is reflected by liquid crystal cells 19, so that it is inclined to be converted to straight line by the one 1/4 wavelength layer 5 again
Light.Linear polarization (exterior light) at this time is consistent with the absorption axiss of polarisation part 8, therefore is absorbed completely by polarisation part 8.
In addition, polarizing film 1 is also equipped with the 3rd transparent resin film 11 in the upside (visual recognition side) of polarisation part 8.And
And the 3rd transparent resin film 11 be UV-absorbing layer when, the deterioration of polarisation part 8 can be reduced.
In addition, polarizing film 1 is also equipped with the 1st adhesive phase between the 1st transparent resin film 2 and infrared-reflecting layers 4
3.Therefore, the water for accumulating in the surface of infrared-reflecting layers 4 can be reliably discharged to by the 1st transparent resin film 2 outer
Portion.
In addition, can more reliably reflect infrared ray when metal layer 13 is silver layer or ag alloy layer.
In addition, when the 1st inorganic oxide layer 12 and the 2nd inorganic oxide layer 14 contain indium system electroconductive oxide, it can
Light-exposed transmitance is more excellent.
It should be noted that constituting in the component of polarizing film 1, the part than polarisation part 8 closer to downside is the 1st transparent
Resin film 2, the 1st adhesive phase 3, infrared-reflecting layers 4, the one 1/4 wavelength layer 5, the 3rd adhesive phase 6, the 2nd transparent resin
Film 7 constitutes an embodiment of phase-contrast film 15 of the invention.Specifically, an embodiment of phase-contrast film 15 according to
It is secondary to have: the 1st transparent resin film 2, the 1st adhesive phase 3, infrared-reflecting layers 4, the one 1/4 wavelength layer 5, the 3rd adhesive phase
6 and the 2nd transparent resin film 7.
Phase-contrast film 15 forms the thin film shape (including plate shape) with specific thickness, along orthogonal with thickness direction
Face direction extends, and has flat upper surface and flat lower surface (2 main surfaces).Phase-contrast film 15 is, for example, to be contained in
One component of image display device (liquid crystal image display device etc.), that is, be not image display device.That is, polarizing film 1 is
For making the component of image display device etc., for without the light sources such as the image-displaying members such as liquid crystal cells 19, LED 20 and with certainly
Available device in the industry of body circulation.
The phase-contrast film 15 can reflect infrared ray, and the transparency can be also maintained under moist environment.In addition, passing through
Polarisation part 8 is configured, so as to effectively inhibit the visible reflectance of exterior light.
Polarizing film 1 and phase-contrast film 15 are for example contained in Optical devices.As Optical devices, for example, can enumerate
The image display devices such as liquid crystal image display device, dimming device etc. out.More specifically, polarizing film 1 and phase-contrast film
The 15 device used for image display protection boards 18 for being suitable as being configured at before image display device (visual recognition side) use.
2. device used for image display protection board
One embodiment of device used for image display protection board 18 is shown in Fig. 2.
As shown in Fig. 2, device used for image display protection board 18 successively has from lower section: polarizing film 1, the 2nd adhesive
Layer 16 and transparent protection plate 17.It should be noted that upside is visual recognition side, downside is liquid crystal cell side.
2nd adhesive phase 16 is the layer for polarizing film 1 and transparent protection plate 17 to be bonded.
2nd adhesive phase 16 has thin film shape (including plate shape), is connect with the upper surface with the 3rd transparent resin film 11
The mode of touching is configured at the upper surface whole face of the 3rd transparent resin film 11.
2nd adhesive phase 16 is prepared by adhesive composition.Adhesive composition can for example enumerate above viscous the 1st
The adhesive composition described in mixture layer 3 can preferably enumerate acrylic adhesive.
The thickness of 2nd adhesive phase 16 is, for example, 1 μm or more, preferably 5 μm or more, in addition, for example, 300 μm hereinafter,
Preferably 150 μm or less, more preferably 50 μm or less.
Transparent protection plate 17 is for protecting the image display devices internal components such as liquid crystal cells 19 from from external
The layer of impact, pollution.
Transparent protection plate 17, which has, overlooks substantially writing board shape, in a manner of contacting with the upper surface of the 2nd adhesive phase 16
It is configured at the upper surface whole face of the 2nd adhesive phase 16.
Transparent protection plate 17 is the transparency, has the thickness and mechanical strength of appropriateness.
As transparent protection plate 17, can enumerate such as the hard resin as acrylic resin, polycarbonate resin
The resin plate of formation, such as glass plate.
It should be noted that anti-reflection layer (AR) etc. can be formed in the upper surface of transparent protection plate 17 and/or lower surface
Functional layer.
The thickness of transparent protection plate 17 is, for example, 10 μm or more, preferably 500 μm or more, in addition, for example, 100mm with
Under, preferably 10mm or less, more preferably 5mm or less.
Moreover, 20 phase of liquid crystal cells 19 shown in dotted line of the device used for image display protection board 18 for example with Fig. 2 and light source
Configuration is used.It should be noted that, although not shown, but liquid crystal cells 19 have liquid crystal layer, clamp 2 of liquid crystal layer partially
Light part and colour filter.
Device used for image display protection board 18 forms the thin film shape (including plate shape) with specific thickness, edge and thickness
The orthogonal face direction in direction extends, and has flat upper surface and flat lower surface (2 main surfaces).Device used for image display
Protection board 18 is, for example, a component for being contained in image display device (liquid crystal image display device etc.), that is, is not that image is aobvious
Showing device.That is, polarizing film 1 is the component for making image display device etc., to show without images such as liquid crystal cells 19
The light sources such as element, LED 20 and with itself circulation industry on available device.
Since device used for image display protection board 18 has polarizing film 1, infrared ray can be reflected and inhibit outer
The visible reflectance of portion's light.In addition, being also able to maintain that the transparency under moist environment.
3. variation
It is illustrated referring to variation of Fig. 3~Fig. 8 to polarizing film 1.It should be noted that in other embodiments,
Reference marks identical to element numeral same as the embodiment of above-mentioned Fig. 1 omits detail explanation.
In Fig. 1, polarizing film 1 successively has from lower section: the 1st transparent resin film 2, the 1st adhesive phase 3, infrared ray
Reflecting layer 4, the one 1/4 wavelength layer 5, the 3rd adhesive phase 6, the 2nd transparent resin film 7, polarisation part 8, the 2nd 1/4 wavelength layer 9,
4th adhesive phase 10 and the 3rd transparent resin film 11, for example, as shown in figure 3, can be by the one 1/4 wavelength layer the 5 and the 2nd thoroughly
Ming tree membrane of lipoprotein 7 is interchangeable with one another, and then can also be interchangeable with one another by the 2nd 1/4 wavelength layer 9 and the 3rd transparent resin film 11.That is,
Polarizing film 1 can successively have from lower section: the 1st transparent resin film 2, the 1st adhesive phase 3, infrared-reflecting layers the 4, the 2nd
Transparent resin film 7, the 3rd adhesive phase 6, the one 1/4 wavelength layer 5, polarisation part 8, the 3rd transparent resin film 11, the 4th adhesive
The 10 and the 2nd 1/4 wavelength layer 9 of layer.
It should be noted that in this case, phase-contrast film shown in Fig. 3 15 successively has from lower section: the 1st transparent tree
Membrane of lipoprotein 2, the 1st adhesive phase 3, infrared-reflecting layers 4, the 2nd transparent resin film 7, the 3rd adhesive phase 6 and the one 1/4 wave
Long layer 5.
Polarizing film 1 and phase-contrast film 15 shown in Fig. 3 also play thin with polarizing film 1 shown in FIG. 1 and phase difference
The same function and effect of film 15.
In addition, being glued on the basis of embodiment shown in Fig. 3 as shown in figure 4, polarizing film 1 may not possess the 3rd
Mixture layer 6 and the 2nd transparent resin film 7.That is, polarizing film 1 shown in Fig. 4 successively has from lower section: the 1st transparent resin is thin
Film 2, the 1st adhesive phase 3, infrared-reflecting layers 4, the one 1/4 wavelength layer 5, polarisation part 8, the 3rd transparent resin film the 11, the 4th are viscous
Mixture layer 10 and the 2nd 1/4 wavelength layer 9.
It should be noted that in this case, phase-contrast film shown in Fig. 4 15 successively has from lower section: the 1st transparent tree
Membrane of lipoprotein 2, the 1st adhesive phase 3, infrared-reflecting layers 4 and the one 1/4 wavelength layer 5.
Polarizing film 1 and phase-contrast film 15 shown in Fig. 4 play and polarizing film 1 shown in FIG. 1 and phase-contrast film
15 same function and effect.Preferably, from by having the 2nd transparent resin film 7 so as to be further reduced haze, gold
From the perspective of the corrosion for belonging to layer 13, polarizing film 1 and phase-contrast film 15 shown in FIG. 1 can be preferably enumerated.
In addition, as shown in figure 5, polarizing film 1 can not have the 3rd adhesive phase 6, the 2nd 1/4 wavelength layer 9 and the 4th glues
Mixture layer 10.That is, polarizing film 1 shown in fig. 5 successively has from lower section: the 1st transparent resin film 2, the 1st adhesive phase 3,
Infrared-reflecting layers 4, the one 1/4 wavelength layer 5, the 2nd transparent resin film 7, polarisation part 8 and the 3rd transparent resin film 11.
It should be noted that phase-contrast film 15 shown in fig. 5 successively has from lower section: the 1st transparent resin film 2,
1st adhesive phase 3, infrared-reflecting layers 4, the one 1/4 wavelength layer 5 and the 2nd transparent resin film 7.
Polarizing film 1 and phase-contrast film 15 shown in fig. 5 also play thin with polarizing film 1 shown in FIG. 1 and phase difference
The same function and effect of film 15.
In addition, as shown in fig. 6, polarizing film 1 can not have the 3rd adhesive phase 6, the 2nd transparent resin film 7, second
1/4 wavelength layer 9 and the 4th adhesive phase 10.That is, polarizing film 1 shown in fig. 6 successively has from lower section: the 1st transparent resin
Film 2, the 1st adhesive phase 3, infrared-reflecting layers 4, the one 1/4 wavelength layer 5, polarisation part 8 and the 3rd transparent resin film 11.
It should be noted that phase-contrast film 15 shown in fig. 6 successively has from lower section: the 1st transparent resin film 2,
1st adhesive phase 3, infrared-reflecting layers 4 and the one 1/4 wavelength layer 5.
Polarizing film 1 and phase-contrast film 15 shown in fig. 6 also play thin with polarizing film 1 shown in FIG. 1 and phase difference
The same function and effect of film 15.Preferably, from by having the 2nd transparent resin film 7 so as to be further reduced haze,
From the perspective of the corrosion of metal layer 13, polarizing film 1 and phase-contrast film 15 shown in FIG. 1 can be enumerated.
In addition, as shown in fig. 7, polarizing film 1 can not have the 1st adhesive phase 3, the 2nd transparent resin film 7, second
1/4 wavelength layer 9 and the 4th adhesive phase 10, furthermore it is possible to which the one 1/4 wavelength layer 5 and the 3rd adhesive phase 6 is interchangeable with one another.That is,
Polarizing film 1 shown in Fig. 7 successively has from lower section: the 1st transparent resin film 2, infrared-reflecting layers 4, the 3rd adhesive phase
6, the one 1/4 wavelength layer 5, polarisation part 8 and the 3rd transparent resin film 11.
It should be noted that phase-contrast film 15 shown in Fig. 7 successively has from lower section: the 1st transparent resin film 2,
Infrared-reflecting layers 4, the 3rd adhesive phase 6 and the one 1/4 wavelength layer 5.
Polarizing film 1 and phase-contrast film 15 shown in Fig. 7 also play thin with polarizing film 1 shown in FIG. 1 and phase difference
The same function and effect of film 15.Preferably, from by have the 1st adhesive phase 3 and the 2nd transparent resin film 7 so as to
It further suppresses and hazes, from the perspective of the corrosion of metal layer 13, it is thin that polarizing film 1 and phase difference shown in FIG. 1 can be enumerated
Film 15.
In addition, as shown in figure 8, polarizing film 1 can not have: the 1st adhesive phase 3, the one 1/4 wavelength layer the 5, the 3rd are viscous
Mixture layer 6, the 2nd transparent resin film 7, the 2nd 1/4 wavelength layer 9, the 4th adhesive phase 10 and the 3rd transparent resin film 11.That is,
Polarizing film 1 shown in Fig. 8 successively has from lower section: the 1st transparent resin film 2, infrared-reflecting layers 4 and polarisation part 8.
Polarizing film 1 shown in Fig. 8 also plays function and effect same as polarizing film 1 shown in FIG. 1.Preferably,
From by having the 1st adhesive phase 3 and the 2nd transparent resin film 7 so as to be further reduced haze, the corrosion of metal layer 13
Viewpoint and by having the one 1/4 wavelength layer 5 so as to reliably reduce the mirroring of exterior light from the perspective of, can
Enumerate polarizing film 1 and phase-contrast film 15 shown in FIG. 1.
In addition, the 3rd transparent resin film 11 uses UV-absorbing layer, but example in polarizing film 1 shown in FIG. 1 to FIG. 8
If the 3rd transparent resin film may be non-UV-absorbing layer.In this case, in device used for image display protection board 18
2 adhesive phases 16 are preferably using the adhesive phase of absorbable ultraviolet light.Specifically, the 2nd adhesive phase 16 is for example containing ultraviolet
Light absorbers.Such device used for image display protection board 18 also plays and has the figure of polarizing film 1 shown in FIG. 1 to FIG. 8
As the display device same function and effect of protection board 18.
In addition, though not shown, but infrared-reflecting layers 4 may include except the 1st inorganic oxide layer 12, metal layer 13,
Layer other than 2nd inorganic oxide layer 14.For example, can be in the side opposite with metal layer 13 of the 2nd inorganic oxide layer 14
Have the 2nd metal layer and the 3rd inorganic oxide layer, it can also be in the side opposite with the 2nd metal layer of the 3rd inorganic oxide layer
It is further equipped with the 3rd metal layer and the 4th inorganic oxide layer.
Furthermore it is possible to be also equipped with such as stain-proofing layer, closely sealed, water repellent in a face of the 1st transparent resin film 2 or two sides
Layer, anti-reflection layer, oligomer prevent the functional layers such as layer, can be suitable for application according to required function.Functional layer is preferably by wrapping
Layer containing organic resin is formed.
Embodiment
Examples and Comparative Examples described below, more specifically the present invention will be described.It should be noted that the present invention is not
By any restriction of Examples and Comparative Examples.In addition, being compounded ratio (content ratio), physics value, ginseng used in record below
The specific numerical value such as number could alternatively be above-mentioned " specific embodiment " middle compounding ratio record, corresponding with them
The upper limit value (numerical value for being defined as " following ", " deficiency ") or lower limit value of the record such as (content ratio), physics value, parameter are (fixed
Justice for " more than ", the numerical value of " being more than ").
Embodiment 1
As shown in Figure 1, by TAC film (65 μm of thickness, the 1st transparent resin film), acrylic adhesive layer (thickness 23
μm, the 1st adhesive phase), infrared-reflecting layers, the plate of λ/4 (50 μm of thickness, the one 1/4 wavelength layer), acrylic adhesive layer
(23 μm of thickness, the 3rd adhesive phase), TAC film (40 μm of thickness, the 2nd transparent resin film), polarisation part (22 μm of thickness, iodine leaching
Seep PVA), the plate of λ/4 (50 μm of thickness, the 2nd 1/4 wavelength layer), acrylic adhesive layer (23 μm of thickness, the 4th adhesive phase),
TAC film (60 μm of thickness, the 3rd transparent resin film) layer in a manner of being configured in order from lower section containing ultraviolet absorbing agent
It is folded, make the polarizing film of embodiment.
It should be noted that as infrared-reflecting layers, using by noncrystalline ITO (thickness 40nm, the 1st inorganic oxide
Layer), the stacking that is formed of Ag-Cu alloy (thickness 8nm, metal layer) and noncrystalline ITO (thickness 40nm, the 2nd inorganic oxide layer)
Body.
Then, as shown in Fig. 2, stacking gradually acrylic adhesive layer (23 μm of thickness, in the upper surface of polarizing film
2 adhesive phases), low reflection glass plate (thickness 5mm, transparent protection plate), make device used for image display protection board.
Embodiment 2
The thickness of the metal layer of infrared-reflecting layers is changed to 12nm, in addition to this, is operated similarly with example 1,
Make polarizing film and device used for image display protection board.
Embodiment 3
The thickness of the metal layer of infrared-reflecting layers is changed to 20nm, in addition to this, is operated similarly with example 1,
Make polarizing film and device used for image display protection board.
Comparative example 1
As shown in figure 9, by TAC film (65 μm of thickness, the 1st transparent resin film), acrylic adhesive layer (thickness 23
μm, the 1st adhesive phase), the plate of λ/4 (50 μm of thickness, the one 1/4 wavelength layer), polarisation part (22 μm of thickness, iodine infiltrate PVA), TAC
Film (40 μm of thickness, the 2nd transparent resin film), acrylic adhesive layer (23 μm of thickness, the 3rd adhesive phase), the plate of λ/4
(50 μm of thickness, the 2nd 1/4 wavelength layer), infrared-reflecting layers are laminated in a manner of configuring in order from lower section, comparison example
Polarizing film.
It should be noted that infrared-reflecting layers use infrared reflection identical with the infrared-reflecting layers of embodiment 1
Layer.
Then, it operates similarly with example 1, stacks gradually acrylic adhesive layer in the upper surface of polarizing film
(23 μm of thickness, the 2nd adhesive phase), low reflection glass plate (thickness 5mm, transparent protection plate), the image of comparison example are shown
Device protection board.
(moisture permeability)
Using moisture-vapor transmission measurement device (" PERMATRANW3/33 ", MOCON corporation), in 40 DEG C of temperature, phase
Moisture-inhibiting to the 1st transparent resin film, the 2nd transparent resin film and the 3rd transparent resin film is measured under conditions of humidity 90%
Degree.The moisture permeability of each transparent resin film is 200g/m2Above and 800g/m for 24 hours2It is following for 24 hours.
(reflectivity)
Using spectrophotometer (" U-4100 ", Hitachi High-Technologies Corporation system), to each
The device used for image display protection board irradiation visible light of Examples and Comparative Examples and red exterior light measure the light reflection under each wavelength
Rate.By at this time be illustrated in Figure 10.In addition, by the average reflectance (wavelength interval of the near infrared range under 800~1600nm
The average value of the reflectivity of 5nm) it is shown in table 1.
It is clear that according to Figure 10, the polarizing film of Examples 1 to 2 reduces relative to the polarizing film of comparative example 1 can
The reflection of light-exposed (the especially red light of 600~800nm of wavelength).In addition it will also realize that, well 800~1600nm of reflection wavelength
Infrared ray.In turn it is found that embodiment 2 is relative to embodiment 1, it is seen that the reflectivity of light is essentially identical, but it is more reflected
Infrared ray.In addition, the polarizing film of embodiment 3 compared with comparative example 1, is the compositions for significantly largely reflecting infrared rays.Therefore,
Although compared with comparative example 1, reflection is increased, in wavelength in the region 750~800nm of wavelength near infrared spectral range
In the visible light region below 600~750nm, compared with comparative example 1, it is seen that light reflection is small.It follows that even if being formed into red
In the case that outside line reflectivity is more than the polarizing film of 40% high IR line reflection, more than half red can be also effectively inhibited
The reflection of visible wavelength region.
(hazing under moist environment)
Firstly, using haze meter (" HGM-2DP ", Suga Test Instruments Co., Ltd. system) to each embodiment
And the mist degree before the device used for image display protection board measurement humidification of comparative example.In addition, by the image of each Examples and Comparative Examples
Mist degree after display device protection board loads 500 hours under 60 DEG C, the wet condition of 95%RH, after measurement humidification.By this
A little results are shown in table 1.
(appearance)
The device used for image display protection board of each Examples and Comparative Examples is loaded under 60 DEG C, the wet condition of 95%RH
After 500 hours, optical microphotograph sem observation (viewing area: 300cm is carried out2), thus evaluate device used for image display protection board
Appearance (the specifically pit corrosions of infrared-reflecting layers).
It will be evaluated as ◎ the case where not observing 400 μm of maximum length or more of open defect (corrosion) completely, it will be basic
The case where not observing 400 μm of maximum length or more of open defect (corrosion) is evaluated as zero, will fragmentary visible maximum length 400
μm or more open defect the case where be evaluated as ×.It the results are shown in table 1.
[table 1]
Table 1
It should be noted that foregoing invention is provided as embodiment illustrated of the invention, but this is only simple
Illustration, do not do limited explanation.The variation of the invention being apparent to those skilled in the art is included in this Shen
In claims please.
Industrial availability
Polarizing film, device used for image display protection board and phase-contrast film of the invention can be applied to various industry systems
Product, such as suitable for liquid crystal display component etc..
Description of symbols
1 polarizing film
2 the 1st transparent resin films
3 the 1st adhesive phases
4 infrared-reflecting layers
5 the 1st wavelength layers
7 the 2nd transparent resin films
8 polarisation parts
11 the 3rd transparent resin films
12 the 1st inorganic oxide layers
13 metal layers
14 the 2nd inorganic oxide layers
15 phase-contrast films
16 the 2nd adhesive phases
17 transparent protection plates
18 device used for image display protection boards
Claims (13)
1. a kind of polarizing film, which is characterized in that successively have in thickness direction side: the 1st transparent resin film, infrared ray are anti-
Layer and polarisation part are penetrated,
The infrared-reflecting layers successively have: the 1st inorganic oxide layer, metal layer and the 2nd inorganic oxide layer.
2. polarizing film according to claim 1, which is characterized in that the infrared-reflecting layers and the polarisation part it
Between be also equipped with 1/4 wavelength layer.
3. polarizing film according to claim 1, which is characterized in that the infrared-reflecting layers and the polarisation part it
Between be also equipped with the 2nd transparent resin film,
2nd transparent resin film with a thickness of 10 μm or more and 100 μm or less.
4. polarizing film according to claim 1, which is characterized in that the thickness direction side of the polarisation part also
Has the 3rd transparent resin film.
5. polarizing film according to claim 4, which is characterized in that the 3rd transparent resin film is ultraviolet radiation absorption
Layer.
6. polarizing film according to claim 1, which is characterized in that the 1st transparent resin film with it is described infrared
The 1st adhesive phase is also equipped between line reflection layer.
7. polarizing film according to claim 1, which is characterized in that the moisture permeability of the 1st transparent resin film is 5g/
m2More than for 24 hours.
8. polarizing film according to claim 1, which is characterized in that the metal layer is silver layer or ag alloy layer.
9. polarizing film according to claim 1, which is characterized in that the 1st inorganic oxide layer and described 2nd inorganic
Oxide skin(coating) contains indium system oxide.
10. a kind of device used for image display protection board, which is characterized in that have:
Polarizing film described in claim 1,
It is set to the 2nd adhesive phase of the thickness direction side of the polarizing film, and
It is set to the transparent protection plate of the thickness direction side of the 2nd adhesive phase.
11. a kind of phase-contrast film, which is characterized in that successively have in thickness direction side: the 1st transparent resin film, infrared
Line reflection layer and 1/4 wavelength layer,
The infrared-reflecting layers successively have: the 1st inorganic oxide layer, metal layer and the 2nd inorganic oxide layer.
12. phase-contrast film according to claim 11, which is characterized in that it is also equipped with the 2nd transparent resin film,
2nd transparent resin film with a thickness of 10 μm or more and 100 μm or less.
13. phase-contrast film according to claim 11, which is characterized in that the 1st transparent resin film with it is described
The 1st adhesive phase is also equipped between infrared-reflecting layers.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016224067 | 2016-11-17 | ||
| JP2016-224067 | 2016-11-17 | ||
| JP2017-215710 | 2017-11-08 | ||
| JP2017215710A JP6952580B2 (en) | 2016-11-17 | 2017-11-08 | Polarizing film, protective plate for image display device, and retardation film |
| PCT/JP2017/040858 WO2018092750A1 (en) | 2016-11-17 | 2017-11-14 | Polarizing film, protective plate for image display device, and retardation film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109983375A true CN109983375A (en) | 2019-07-05 |
Family
ID=62237136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780068209.3A Pending CN109983375A (en) | 2016-11-17 | 2017-11-14 | Polarizing film, device used for image display protection board and phase-contrast film |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6952580B2 (en) |
| KR (1) | KR102522225B1 (en) |
| CN (1) | CN109983375A (en) |
| TW (1) | TWI770080B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114761840A (en) * | 2019-11-28 | 2022-07-15 | 日东电工株式会社 | Optical laminate, optical device, and image display device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7463871B2 (en) | 2020-06-16 | 2024-04-09 | 日本精機株式会社 | Display device |
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2017
- 2017-11-08 JP JP2017215710A patent/JP6952580B2/en active Active
- 2017-11-14 KR KR1020197010448A patent/KR102522225B1/en active IP Right Grant
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6952580B2 (en) | 2021-10-20 |
| TWI770080B (en) | 2022-07-11 |
| KR20190076961A (en) | 2019-07-02 |
| KR102522225B1 (en) | 2023-04-14 |
| JP2018084809A (en) | 2018-05-31 |
| TW201833598A (en) | 2018-09-16 |
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