CN104237978A - An optical laminated body with a touch screen, a polaroid, an image display device and a method for suppressing Newton's ring generation - Google Patents

An optical laminated body with a touch screen, a polaroid, an image display device and a method for suppressing Newton's ring generation Download PDF

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Publication number
CN104237978A
CN104237978A CN201410254334.1A CN201410254334A CN104237978A CN 104237978 A CN104237978 A CN 104237978A CN 201410254334 A CN201410254334 A CN 201410254334A CN 104237978 A CN104237978 A CN 104237978A
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index layer
mentioned
low
screen
touch
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CN104237978B (en
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堀井笃
堀尾智之
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Liquid Crystal (AREA)
  • Surface Treatment Of Optical Elements (AREA)
  • Position Input By Displaying (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Polarising Elements (AREA)

Abstract

The invention relates to an optical laminated body with a touch screen, a polaroid, an image display device and a method for suppressing Newton's ring generation. The problem of the invention is to provide the optical laminated body with the touch screen which can suppress Newton's ring generation and obtain high-quality displayed images. The optical laminated body with the touch screen of the invention is formed through configuration of an optical film and the touch screen in opposite directions. The optical film is formed by means of sequentially laminating a hard coating layer and a low reflective index layer (A) on one surface of light transmitting substrate. One surface of the touch screen is provided with a low reflective index layer (B) . The characteristics are that the above optical film and the above touch screen are configured to be opposite to each other when a gap exists between the above optical film and the above touch screen in the same way as the low reflective index layer (A) is arranged to be facing the low reflective index layer (B); concave-convex portions form in the surface (A), on the side of the above low reflective index layer (B), of the low reflective index layer (A) and in the surface (B), on the side of the above low reflective index layer (A), of the low reflective index layer (B); a reflection Y value of the above surface (A) and surface (B) is 0.1% and is less than 1.5%; a 10-point average roughness degree (Rz) of the above surface (A) and surface (B) is 20nm-90nm; and an average inclination angle (delta alpha) is 5 degrees to 20 degrees.

Description

The suppressing method that optical laminate with touch-screen, polaroid, image display device and Newton ring occur
[technical field]
The present invention relates to the suppressing method that the optical laminate of band touch-screen, polaroid, image display device and Newton ring occur.
[background technology]
As everyone knows, touch-screen is set on the surface of display panels etc., user can be made to utilize finger or pen etc. to touch and the information of carrying out input.
But for the display panels being provided with such touch-screen, due to following reason, touch-screen and display panels are slightly provided with gap and are arranged.
That is, touch-screen is from display panels because its manufacturing condition is different, and thus touch-screen and display panels are difficult in fact maybe can not form and make its complete gapless.In addition, owing to touch-screen can be installed on display panels after manufacturing touch-screen and display panels respectively to produce end article, when thus finding the breakage of touch-screen after fabrication, only touch-screen can be changed.
But, when there is gap between such touch-screen and display panels, utilize pen or finger etc. from depending on recognize side pressing touch-screen, touch-screen bending and contact with display panels time, can Newton ring be produced.Namely, can produce by the periphery of the sensing instruments such as the pen that press against or finger can the gap of degree compared with optical wavelength, interfered by the light that the clearance side interface of the light that the clearance side interface of touch-screen is reflected and display panels is reflected and produce Newton ring, there is the problem that picture observability reduces.
For the problem of this generation Newton ring, such as, propose in patent documentation 1, make resin bed at the gap-filled resin material of touch-screen and display panels, thus, the reflection of the interface in the gap of elimination and touch-screen and display panels.
But, when potting resin material manufactures end article, even if find the breakage of touch-screen after manufacturing end article, also cannot only change this touch-screen.Further, be difficult to gap resin material being filled into completely touch-screen and display panels, if comprise the state of bubble, then become the reason of display image generation defect.
In addition, such as propose in patent documentation 2 the concavo-convex reduction seeking outside light reflectance is set on the surface of the clearance side of touch-screen and display panels.
But concavo-convex reduce reflectivity although describe in patent documentation 2 by arranging, its value is about 3.0%, and such reflectivity fully cannot suppress the generation of Newton ring.Further, study completely about concavo-convex shape in citing document 2.
[prior art document]
[patent documentation]
Patent documentation 1: Japanese Unexamined Patent Publication 2004-077887 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2002-189565 publication
[summary of the invention]
[inventing problem to be solved]
In view of above-mentioned present situation, the object of the present invention is to provide fully can suppress the generation of Newton ring, suppressing method that the optical laminate of the band touch-screen that can obtain high-grade display image, the polaroid using the optical laminate of this band touch-screen, image display device and Newton ring occur.
[solving the means of problem]
The present invention relates to a kind of optical laminate with touch-screen, it is the optical laminate of blooming and touch-screen band touch-screen arranged opposite, this blooming is the blooming of sequentially lamination hard conating and low-index layer (A) on a face of Mght-transmitting base material, and this touch-screen is the touch-screen possessing low-index layer (B) on one face; It is characterized in that, above-mentioned blooming and above-mentioned touch-screen are disposed facing according to above-mentioned low-index layer (A) and above-mentioned low-index layer (B) aspectant mode under the state each other with gap; Be formed concavo-convex on the surface (B) of the surface (A) of above-mentioned low-index layer (B) side of above-mentioned low-index layer (A) and above-mentioned low-index layer (A) side of above-mentioned low-index layer (B); The reflection Y value on above-mentioned surface (A) and surface (B) is more than 0.1% and is less than 1.5%; 10 concavo-convex mean roughness (Rz) on above-mentioned surface (A) and surface (B) are 20nm ~ 90nm, (Δ is a) 5 ° ~ 20 ° to average slope angle.
In the optical laminate of band touch-screen of the present invention, preferred above-mentioned low-index layer (A) and low-index layer (B) are containing hollow silica particles and the contain fluorine atoms resin as adhesive resin.
In addition, in above-mentioned low-index layer (A) and low-index layer (B), relative to solid constituent 100 mass parts of above-mentioned adhesive resin, the content of preferred above-mentioned hollow silica particles is 80 mass parts ~ 200 mass parts.
In addition, in the optical laminate of band touch-screen of the present invention, preferred above-mentioned low-index layer (A) and low-index layer (B) are the solid silicon dioxide microparticle of 80nm ~ 300nm further containing mean grain size.
The invention still further relates to a kind of polaroid, it is the polaroid possessing polarizer, it is characterized in that, possesses the optical laminate of above-mentioned band touch-screen on above-mentioned polarizer surface.
The invention still further relates to a kind of image display device, it is characterized in that, it possesses the optical laminate of above-mentioned band touch-screen or above-mentioned polaroid.
The invention still further relates to the suppressing method that a kind of Newton ring occurs, the method is the method using the suppression Newton ring of the optical laminate of band touch-screen to occur, the optical laminate of this band touch-screen is the optical laminate of the band touch-screen that blooming and touch-screen are disposed facing, this blooming is the blooming of sequentially lamination hard conating and low-index layer (A) on a face of Mght-transmitting base material, this touch-screen is the touch-screen possessing low-index layer (B) on one face, the method is characterized in that, above-mentioned blooming and above-mentioned touch-screen are disposed facing under the state each other with gap, to make above-mentioned low-index layer (A) face-to-face with above-mentioned low-index layer (B), be formed concavo-convex on the surface (B) of the surface (A) of above-mentioned low-index layer (B) side of above-mentioned low-index layer (A) and above-mentioned low-index layer (A) side of above-mentioned low-index layer (B), the reflection Y value on above-mentioned surface (A) and surface (B) is more than 0.1% and is less than 1.5%, 10 concavo-convex mean roughness (Rz) on above-mentioned surface (A) and surface (B) are 20nm ~ 90nm, (Δ is a) 5 ° ~ 20 ° to average slope angle.
It should be noted that, in this manual, as long as no mentioning especially, " resin " is the concept also comprising monomer, oligomer etc.
Below describe the present invention in detail.
Present inventor has performed further investigation, found that, in the optical laminate of the band touch-screen be disposed facing at the low-index layer of touch-screen and the low-index layer of blooming, this concavo-convex shape is controlled by arranging concavo-convex, simultaneous altitude on the relative surface of above-mentioned each low-index layer, even if be provided with gap thus between touch-screen and blooming, also can suppress the generation of Newton ring, good display image can be obtained, thus complete the present invention.
The optical laminate of the band touch-screen of the present invention of such formation completes based on following technological thought.
That is, consider from the structure of touch-screen system, the generation of Newton ring cannot be prevented from principle.Thus, need to make occurred Newton ring not easily be detected (detecting) to go out.
In order to make Newton ring not easily be detected, the absolute value of Newton ring intensity be reduced, namely reduce the concentration of concealed wire (open-wire line), thus make two the relative interfaces in touch-screen system become anti-reflecting layer together, thus reduce reflection light quantity itself.
In addition, shade line is become complicated line from circle, utilize the sensitivity of " simple geometry lines are not easily detected " this people.
In addition, if impose camouflage color, then detection sensitivity is deteriorated, thus by make the rugosity of bright (secretly) line uneven, namely concave-convex surface is set by two the relative interfaces in touch-screen system, make 2 of the distance between this interface times of positions of departing from half-wavelength with the integral multiple of wavelength in concentric circles.
In addition, if the change of light and shade slows down, then detection sensitivity is deteriorated, thus by reducing the contrast of adjacent shade line, namely by have between Newton ring concavo-convex, produce small interference and be set up mixing, light and shade difference reduces.
As described above, if the method illustrated by using, then occurred Newton ring can be made not easily to be detected.
Herein, all the time, there will be a known the outmost surface being configured in liquid crystal indicator etc., the optical laminate with low-index layer.The low-index layer of the optical laminate that such outmost surface being configured in liquid crystal indicator etc. is used, if form the concaveconvex shape equal with the surface of the low-index layer in the optical laminate of band touch-screen of the present invention on its surface, then mar resistance is poor.Therefore, the surface of the low-index layer in existing optical laminate needs to be smooth surface as far as possible.Thus, the low-index layer in the existing known optical laminate being configured in the outmost surface of liquid crystal indicator etc. cannot be used as the low-index layer of the above-mentioned blooming in the present invention.
It should be noted that, in the optical laminate of band touch-screen of the present invention, for the low-index layer of above-mentioned blooming, owing to there being touch-screen to exist as mentioned above, thus it is not outmost surface.Thus as long as the mar resistance that the low-index layer of above-mentioned blooming has hurtless degree in manufacturing process is just enough, from the aspect of mar resistance, it is no problem for forming above-mentioned specific concaveconvex shape on the surface of low-index layer.Specifically, the optical laminate of band touch-screen of the present invention preferably has the mar resistance of following degree: namely, use steel wool (" BONSTAR#0000 (trade name) ", Japanese steel wool Co., Ltd. (Japanese ス チ ー ル ウ ー Le Co., Ltd.) manufactures) at friction load 100g/cm 2under 10 reciprocating frictions are carried out to the low-index layer of above-mentioned blooming after, visual unconfirmed to scar.
Fig. 1 is the sectional view of an example of the optical laminate schematically showing band touch-screen of the present invention.
As shown in Figure 1, the optical laminate 10 of band touch-screen of the present invention has blooming 11 and touch-screen 15, and this touch-screen 15 is disposed facing with this blooming 11.
Blooming 11 has the formation of sequentially lamination hard conating 13 and low-index layer (A) 14 on a face of Mght-transmitting base material 12, and touch-screen 15 has the structure possessing low-index layer (B) 16 on one face.
In addition, blooming 11 and touch-screen 15 carry out arranged opposite according to low-index layer (A) 14 and the aspectant mode of low-index layer (B) 16 under the state each other with gap.
In addition, although not shown, but in the optical laminate 10 of band touch-screen of the present invention, define concavo-convex on the surface (B) of the surface (A) of low-index layer (B) 16 side of low-index layer (A) 14 and low-index layer (A) 14 side of low-index layer (B) 16.
10 concavo-convex mean roughness (Rz) of above-mentioned surface (A) and surface (B) (hereinafter also both being called together on " surface ") are 20nm ~ 90nm, (Δ is a) 5 ° ~ 20 ° to average slope angle.By arranging the concaveconvex shape of satisfied such special parameter on above-mentioned surface, the optical laminate of band touch-screen of the present invention can the high generation flatly suppressing Newton ring.
It should be noted that, in the past, for the object of giving anti-glare, there will be a known the anti-glare film possessing the antiglare layer on surface with concaveconvex shape, and optical laminate of the present invention is different from existing like this anti-glare film.
That is, optical laminate of the present invention is in order to suppress the generation of Newton ring, defines specific concaveconvex shape at above-mentioned surface (A) and surface (B); Compared with the concaveconvex shape formed with the surface at existing anti-glare film, the value of the above-mentioned Rz of concaveconvex shape formed at this surface (A) and surface (B) is minimum.Thus, the optical laminate of the present invention defining such concaveconvex shape can not get the such anti-glare of existing anti-glare film.And on the other hand, utilize the present invention, can the high generation flatly suppressing Newton ring.
When 10 concavo-convex mean roughness (Rz) on above-mentioned surface are less than 20nm, surperficial is concavo-convex few, fully cannot suppress the generation of Newton ring; In addition, substantially Rz more can suppress more greatly the generation of Newton ring well, at above-mentioned Rz once reach certain size, just have the tendency that mar resistance is deteriorated, if particularly above-mentioned Rz is more than 90nm, then cannot guarantee as the mar resistance required for touch-screen, and the reason that the optical laminate becoming band touch-screen of the present invention is injured in manufacturing process.The preferred lower limit of above-mentioned 10 mean roughness (Rz) is 35nm, the preferred upper limit is 70nm.
In addition, (when Δ a) is less than 5 °, the concavo-convex of surface becomes mild, fully cannot suppress the generation of Newton ring for the concavo-convex average slope angle on above-mentioned surface.Substantially (Δ is the more large generation that more can suppress Newton ring well a) for average slope angle, at above-mentioned average slope angle, (Δ is a) once reach certain size, just have the tendency that mar resistance is deteriorated, if particularly (Δ is a) more than 20 ° for above-mentioned average slope angle, then cannot guarantee as the mar resistance required for touch-screen, and the reason that the optical laminate becoming band touch-screen of the present invention is injured in manufacturing process.(a) preferred lower limit is 7 ° to Δ to above-mentioned average slope angle, preferred lower limit is 10 °, and the preferred upper limit is 15 °.
It should be noted that, in this manual, (Δ a) is atomic force microscope (the Atomic Force Microscope using SII Nanotechnology society to manufacture for above-mentioned 10 mean roughness (Rz) and average slope angle; AFM) L-trace, at software: the interpretive model in SPIWin: carry out under SPIWin exchange model measuring and the value obtained.SPIWin exchange model is the analytical form of carrying out three-dimensional extended based on nineteen eighty-two version JIS standard (JIS B0601:1982).
In addition, in the optical laminate of band touch-screen of the present invention, the reflection Y value on above-mentioned surface (A) and surface (B) is more than 0.1% and is less than 1.5%.If be less than 0.1%, then the mar resistance on above-mentioned surface (A) and surface (B) is deteriorated, and becomes reason injured in manufacturing process; If more than 1.5%, then the reflection light quantity on above-mentioned surface (A) and surface (B) increases, and fully cannot suppress the generation of Newton ring.The preferred lower limit of above-mentioned reflection Y value is 0.3%, the preferred upper limit is 1.2%.
It should be noted that, above-mentioned reflection Y value is the value representing visual sense reflectivity, it calculates as follows: use the MPC3100 spectrophotometer that society of Shimadzu Seisakusho Ltd. manufactures, 5 ° of normal reflection rates are measured in the wavelength coverage of 380nm ~ 780nm, thereafter utilizing to convert as the software (MPC3100 is built-in) of the brightness of people's eye institute perception calculates, and the value of gained is above-mentioned reflection Y value.
Herein, substantially, above-mentioned reflection Y value is less, more can suppress the generation of Newton ring well, and the inhibition that this Newton ring occurs is that (Δ is a) interrelated and given play to for above-mentioned reflection Y value and above-mentioned average slope angle.Therefore, such as, even if above-mentioned reflection Y value is smaller value, if (Δ is a) smaller value to above-mentioned average slope angle, then the inhibition of Newton ring generation is less, on the contrary, even if above-mentioned reflection Y value is higher value, if (Δ is a) higher value to above-mentioned average slope angle, then the inhibition of Newton ring generation is larger.
In the optical laminate of band touch-screen of the present invention, above-mentioned low-index layer (A) and low-index layer (B) (hereinafter also both merging being called low-index layer) are preferably containing hollow silica particles and the contain fluorine atoms resin as adhesive resin.
It should be noted that, above-mentioned low-index layer refers to as lower floor: refractive index lower than form band touch-screen of the present invention optical laminate the low-index layer such as Mght-transmitting base material beyond the refractive index of construct, and the excellent antireflection performance for luminous ray can have been given play to.
Above-mentioned hollow silica particles is the material of the refractive index for reducing above-mentioned low-index layer, low-index layer containing such hollow silica particles comprises contain fluorine atoms resin as adhesive resin, can be formed and meets the concavo-convex of above-mentioned parameter at the surface suitable of above-mentioned low-index layer thus.This is due to following reason.
Namely, formed as follows containing above-mentioned hollow silica particles and the low-index layer as the contain fluorine atoms resin of adhesive resin: form film by using the low-index layer composition containing these materials, make this dried coating film, solidification, form this low-index layer thus.
In above-mentioned low-index layer composition, if above-mentioned hollow silica particles is in homodisperse state, be then difficult on the surface of formed low-index layer form the concaveconvex shape suppressing Newton ring to occur as described above.But, the surface of above-mentioned hollow silica particles is hydrophilic, on the other hand, above-mentioned contain fluorine atoms resin is hydrophobic resin, thus in above-mentioned low-index layer composition, the poor compatibility of above-mentioned hollow silica particles and contain fluorine atoms resin, the near interface of the hollow silica particles many deflections air layer side (making face side during low-index layer) in above-mentioned film exists.If by hollow silica particles in this wise in the dried coating film partially in state, solidification forms low-index layer, then hollow silica particles is present in the near surface of low-index layer more, can be formed suitably by this hollow silica particles produce concavo-convex.
So hollow silica particles can be utilized to be formed suitably concavo-convex, thus the concaveconvex shape formed on the surface of low-index layer can be controlled at above-mentioned parameter area.
Above-mentioned hollow silica particles has been given play to the formation on the surface of low-index layer and has been met the concaveconvex shape of above-mentioned parameter, reduces the effect of its refractive index simultaneously.It should be noted that, in this manual, " hollow silica particles ", for being filled with the structure of gas in inside, should " hollow silica particles " refer to compared with the refractive index original with silicon dioxide microparticle, and the occupation rate of refractive index and gas is in the silicon dioxide microparticle reduced inversely.
Concrete example as above-mentioned hollow silica particles is not particularly limited, such as, preferably can enumerate and use the silicon dioxide microparticle that disclosed in Japanese Unexamined Patent Publication 2001-233611 publication prepared by technology.Hollow silica particles easy to manufacture, himself hardness is high, thus mix with adhesive resin described later form low-index layer time, can carry out adjusting its layer of intensity is improved and refractive index reduces.
As the mean grain size of above-mentioned hollow silica particles, be preferably 5nm ~ 300nm.By making the mean grain size of hollow silica particles be within the scope of this, the excellent transparency can be given to low-index layer.Preferred lower limit is 8nm, the preferred upper limit is 100nm, and preferred lower limit is 10nm, the further preferred upper limit is further 80nm.
It should be noted that, about the mean grain size of above-mentioned hollow silica particles, when this hollow silica particles of individualism, it refers to the value utilizing dynamic light scattering determination to go out.On the other hand, the mean grain size of the hollow silica particles in above-mentioned low-index layer is the value calculated as follows: utilize STEM etc. to observe the cross section of low-index layer, any selection 30 hollow silica particles, the particle diameter in its cross section is measured, calculate its mean value, as above-mentioned mean grain size.
In addition, the outer casing thickness of above-mentioned hollow silica particles is preferably 5nm ~ 20nm.If outer casing thickness is less than 5nm, then not easily manufacture, and the intensity of hollow silica particles is not enough, easily crushes; If more than 20nm, then cannot make low-index layer low-refraction fully.The preferred lower limit of thickness of above-mentioned shell is 7nm, the preferred upper limit is 15nm.It should be noted that, above-mentioned shell refers to the shell be made up of silicon dioxide except the gas except existing at the core of above-mentioned hollow silica particles, and the thickness of this shell measures by the section microscopic examination of above-mentioned low-index layer.
As the content of the above-mentioned hollow silica particles in above-mentioned low-index layer, relative to solid constituent 100 mass parts of adhesive resin described later, preferably this content is 80 mass parts ~ 200 mass parts.If be less than 80 mass parts, then the content of hollow silica particles is few, thus cannot make low-index layer low-refraction fully, and cannot meet the concavo-convex of above-mentioned parameter in the formation of the surface of low-index layer; Even and if containing the hollow silica particles more than 200 mass parts, the refractive index of low-index layer also cannot be made to reduce further, but also the intensity of low-index layer can be made not enough.Preferred lower limit is 100 mass parts, the preferred upper limit is 180 mass parts.
In addition, in the optical laminate of band touch-screen of the present invention, above-mentioned low-index layer is preferably except also containing solid silicon dioxide microparticle further containing except above-mentioned hollow silica particles.
Above-mentioned solid silicon dioxide microparticle is for forming small concavo-convex material at low-index layer, and, by containing above-mentioned solid silicon dioxide microparticle, the hardness of above-mentioned low-index layer also can be improved.It should be noted that, in this instructions, " solid silicon dioxide microparticle " is different from above-mentioned hollow form silicon dioxide microparticle, refers to the structure of inner non-blanketing gas and has the silicon dioxide microparticle of the original refractive index of silicon dioxide microparticle.
The mean grain size of above-mentioned solid silicon dioxide microparticle is preferably 80nm ~ 300nm.If be less than 80nm, then cannot be formed concavo-convex suitably, the generation of Newton ring can not be suppressed fully; If more than 300nm, then excessive formation is concavo-convex, and mist degree rises or the hollow silica of unit area reduces, and reflection Y value rises, and the reflection light quantity of interface increases, and fully cannot suppress the generation of Newton ring.
Herein, the mean grain size of above-mentioned solid silicon dioxide microparticle refers to the value measuring in the same manner as above-mentioned hollow silica particles and obtain.
As the content of the above-mentioned solid silicon dioxide microparticle in above-mentioned low-index layer, relative to solid constituent 100 mass parts of aftermentioned adhesive resin, be preferably 1 mass parts ~ 10 mass parts.If be less than 1 mass parts, then cannot form generation that is concavo-convex, that fully cannot suppress Newton ring aptly; If more than 10 mass parts, then excessive formation is concavo-convex, and mist degree rises or the hollow silica of unit area reduces, and reflection Y value rises, and the reflection light quantity of interface increases, and fully cannot suppress the generation of Newton ring.
Further, preferred above-mentioned solid silicon dioxide microparticle contains on surface and has reactive functional group, such as containing the functional group etc. with ethylenic unsaturated link with the aftermentioned contain fluorine atoms resin as adhesive resin.By containing above-mentioned reactive functional groups on surface, the hardness of low-index layer is excellent.
In the optical laminate of band touch-screen of the present invention, above-mentioned low-index layer is preferably containing the contain fluorine atoms resin as adhesive resin.
As above-mentioned contain fluorine atoms resin, be preferably the polymerizable compound at least in the molecule containing fluorine atom or its polymkeric substance.
Be not particularly limited as above-mentioned polymerizable compound, such as, preferably there is the solidification reactivity group such as the functional group of ionizing ray solidification, the polar group of heat curing.In addition can for having the compound of these reactive groups concurrently simultaneously.Relative to this polymerizable compound, polymkeric substance does not have above-mentioned such reactive group etc. completely.
As the above-mentioned polymerizable compound with the functional group of ionizing ray solidification, the fluorochemical monomer with ethylenic unsaturated link can be widely used.More particularly, fluoroolefins (such as fluorothene, vinylidene fluoride, tetrafluoroethene, hexafluoropropylene, perfluorobutadiene, perfluor-2,2-dimethyl-1,3-dioxole etc.) can be exemplified.As the compound with (methyl) acryloxy, can also enumerate: (methyl) acrylic acid-2, 2, 2-trifluoro ethyl ester, (methyl) acrylic acid-2, 2, 3, 3, 3-five fluorine propyl ester, (methyl) acrylic acid-2-(perfluoro butyl) ethyl ester, (methyl) acrylic acid-2-(perfluoro hexyl) ethyl ester, (methyl) acrylic acid-2-(perfluoro capryl) ethyl ester, (methyl) acrylic acid-2-(perfluoro decyl) ethyl ester, α-trifluoromethyl acrylate methyl esters, (methyl) acrylate compounds in the molecule with fluorine atom of α-trifluoromethyl acrylate ethyl ester and so on, following fluorinated polyfunctional (methyl) acrylate compounds, this fluorinated polyfunctional (methyl) acrylate compounds in the molecule containing at least to have 3 fluorine atoms carbon number 1 ~ 14 fluoro-alkyl, at least have the carbon number 1 ~ 14 of 3 fluorine atoms fluoro naphthenic base or at least have 3 fluorine atoms carbon number 1 ~ 14 fluorianted alkylene and containing at least 2 (methyl) acryloxies, etc..
It should be noted that, in this manual, " (methyl) acrylate " refers to acrylate or methacrylate.
As the polar group of above-mentioned heat curing, such as, can enumerate the hydrogen bond formative groups such as hydroxyl, carboxyl, amino, epoxy radicals.
As the polymerizable compound with above-mentioned Thermocurable polar group, can enumerate such as: 4-fluorothene-perfluoroalkyl vinyl ether multipolymer; Fluorothene-hydro carbons vinyl ether co-polymer; The fluorine richness thing etc. of each resin such as epoxy, polyurethane, cellulose, phenol, polyimide.
As the polymerizable compound of polar group of the functional group and heat curing that have the solidification of above-mentioned ionizing ray concurrently, the part of acrylic or methacrylic acid and complete fluoroalkyl, alkenyl ester, aryl ester class, wholly or in part fluorinated vinyl ethers, wholly or in part fluorinated vinyl ester class, wholly or in part fluorinated vinyl ketone etc. can be enumerated.
In addition, in above-mentioned adhesive resin, as above-mentioned contain fluorine atoms resin, also can containing such as: comprise at least one as the monomer of fluorine-containing (methyl) acrylate compounds of polymerizable compound of functional group or the polymkeric substance of monomer mixture with the solidification of above-mentioned ionizing ray; At least one of above-mentioned fluorine-containing (methyl) acrylate compounds and the multipolymer of (methyl) acrylate compounds (such as, (methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) propyl acrylate, (methyl) butyl acrylate, (methyl) 2-ethylhexyl acrylate and so on) in the molecule not containing fluorine atom; The homopolymer of the fluorochemical monomer of fluorothene, vinylidene fluoride, trifluoro-ethylene, chlorotrifluoroethylene, 3,3,3-trifluoro propenes, 1,1,2-tri-chloro-3,3,3-trifluoro propenes, hexafluoropropylene and so on or multipolymer etc.
In addition, can also comprise in these multipolymers containing silicone composition containing silicone vinylidene fluoride copolymer.As silicone composition in this case, can enumerate such as: (gathering) dimethyl siloxane, (gathering) di-ethyl siloxane, (gathering) diphenyl siloxane, (gathering) methyl phenyl siloxane, alkyl-modified (gathering) dimethyl siloxane, containing (gathering) dimethyl siloxane of azo group, dimethyl silicone, phenymethyl silicone, alkyl aralkyl modified silicone, fluorosilicone, polyether modified silicone, fatty acid ester modified silicone, hydrogen containing polysiloxane, containing silanol group silicone, containing alkoxy silicone, phenylol contains silicone, acrylic modified silicone, acrylic acid modified silicone, amino modified silicone, carboxyl acid modified silicone, carbinol-modified silicone, epoxide modified silicone, sulfhydryl modified silicone, fluorine richness silicone, polyether modified silicone etc.Wherein preferably there is the silicone composition of dimethyl siloxane structural.
Further, in above-mentioned adhesive resin, as above-mentioned contain fluorine atoms resin, can also comprise: the compound that the fluorochemicals in the molecule with at least 1 isocyanate group and the compound in the molecule with functional group's (such as, at least 1 amino, hydroxyl, carboxyl and so on) that can react with isocyanate group react and obtain; The compound etc. that the fluorine-containing polyvalent alcohol of fluorine-containing polyether glycol, fluorine-containing alkyl polyols, fluorine-containing polyester polyol, fluorine-containing 6-caprolactone modified polyalcohol and so on reacts with the compound with isocyanate group and obtains.
In above-mentioned adhesive resin, as the content of above-mentioned contain fluorine atoms resin, be preferably below the 90 quality % in the total solid composition of adhesive resin.If more than 90 quality %, then, when forming low-index layer, fully cannot maintain the hardness of its layer of intensity.The preferred upper limit of content of above-mentioned contain fluorine atoms resin is 80 quality %.
The refractive index of above-mentioned contain fluorine atoms resin itself is preferably 1.37 ~ 1.44.When being less than 1.37, the ratio of fluorine atom increases, and is not thus soluble in common solvent, is only soluble in the solvent of contain fluorine atoms.And excessively poor with the dissolubility of the monomer component of hollow silica particles or above-mentioned (methyl) acryl resin, itself can there is gelation in low-index layer composition described later or the film itself that formed albefaction can occur.On the other hand, when more than 1.44, it is close to the refractive index of above-mentioned adhesive resin, and the effect of low-refraction can reduce.
It should be noted that, if above-mentioned adhesive resin is only the above-mentioned bonding agent containing fluorine atom, then the hardness of low-index layer is deteriorated, and thus above-mentioned (methyl) acrylic resin is necessary.
In addition, in above-mentioned adhesive resin, while use above-mentioned contain fluorine atoms resin etc., also can suitably use other resinous principle and for make reactive group etc. occur solidification hardening agent, for improving coating or giving various adjuvants, the solvent of soil resistance.
As other resinous principle above-mentioned, such as, can enumerate ultraviolet curing resin, in the present invention, be particularly suitable for using (methyl) acrylic resin.It should be noted that, in this manual, " (methyl) acrylic acid " refers to acrylic or methacrylic acid.
As above-mentioned (methyl) acrylic resin, polymkeric substance or the multipolymer of (methyl) acrylic monomers can be enumerated, be not particularly limited as above-mentioned (methyl) acrylic monomers, such as can enumerate pentaerythrite three (methyl) acrylate suitably, dipentaerythritol six (methyl) acrylate, pentaerythrite (methyl) tetraacrylate, dipentaerythritol five (methyl) acrylate, trimethylolpropane tris (methyl) acrylate, dipentaerythritol four (methyl) acrylate, double trimethylolpropane four (methyl) acrylate, isocyanuric acid EO modification three (methyl) acrylate etc.
In addition, about these (methyl) acrylate monomers, by a part of modification of molecular skeleton, also can use the monomer utilizing oxirane, epoxypropane, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic series, bis-phenol etc. to carry out modification.
These (methyl) acrylic monomerss can be used alone, and also two or more can be share.Scope, simultaneously solidification reactivity that these (methyl) acrylic monomerss meet refractive index described later are excellent, can improve the hardness of obtained low-index layer.
The refractive index of above-mentioned (methyl) acrylic monomers is preferably 1.47 ~ 1.53.It is in fact being impossible that refractive index is less than 1.47; During more than 1.53, the low-index layer that refractive index is enough low cannot be obtained.
In addition, the weight-average molecular weight of above-mentioned (methyl) acrylic monomers is preferably 250 ~ 1000.If be less than 250, then functional group number reduces, and the hardness of thus obtained low-index layer may reduce.If more than 1000, then functional equivalent's (functional group number/molecular weight) can reduce usually, and the hardness of thus cross-linking density reduction, low-index layer is insufficient.
It should be noted that, the weight-average molecular weight of above-mentioned (methyl) acrylic monomers can utilize gel permeation chromatography (GPC) to be tried to achieve by polystyrene conversion.The solvent that GPC moves phase can use tetrahydrofuran or chloroform.Mensuration post can combinationally use the commercially available capo of tetrahydrofuran post or chloroform post.As above-mentioned commercially available capo, such as, can enumerate Shodex GPC KF-801, GPC-KF800D (be trade name, Showa electrician society manufactures) etc.Detecting device can use RI (differential refractive index) detecting device and UV detecting device.Such solvent, post, detecting device can be used, by GPC systems such as such as Shodex GPC-101 (manufacture of Showa electrician society), suitable mensuration is carried out to above-mentioned weight-average molecular weight.
The haze value of above-mentioned low-index layer is preferably less than 1%.During more than 1%, the light transmission of the optical laminate of band touch-screen of the present invention reduces or resolution reduces, the reason that the display quality becoming image display device reduces.Be more preferably less than 0.5%.It should be noted that, in this manual, haze value is the value of trying to achieve according to JIS K7136.
Above-mentioned low-index layer is preferably such as using steel wool (" BONSTAR#0000 (trade name) ", Japanese steel wool Co., Ltd. (Japanese ス チ ー ル ウ ー Le Co., Ltd.) manufactures) at friction load 100g/cm 2under carry out 10 reciprocating frictions scratch resistance test in can not produce scar.
Above-mentioned low-index layer uses the low-index layer composition adding above-mentioned hollow silica particles and adhesive resin etc. to be formed.
Above-mentioned low-index layer composition also can contain solvent further.
Be not particularly limited as above-mentioned solvent, can enumerate such as: the alcohol such as methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, normal butyl alcohol, sec-butyl alcohol, the tert-butyl alcohol, phenmethylol, PGME; The ketone such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, heptanone, diisobutyl ketone, metacetone; The esters such as methyl acetate, ethyl acetate, propyl acetate, butyl acetate, methyl formate, ethyl formate, propyl formate, butyl formate, PGMEA; The aliphatic hydrocarbon such as hexane, cyclohexane; The halogenated hydrocarbons such as methylene chloride, chloroform, phenixin; The aromatic hydrocarbons such as benzene,toluene,xylene; The acid amides such as dimethyl formamide, dimethyl acetamide, 1-METHYLPYRROLIDONE; The ethers such as diethyl ether, dioxane, tetrahydrofuran; The ether alcohols etc. such as 1-methoxy-2-propanol.Wherein preferable methyl isobutyl ketone, methyl ethyl ketone, isopropyl alcohol (IPA), normal butyl alcohol, sec-butyl alcohol, the tert-butyl alcohol, PGME, PGMEA.
In addition, above-mentioned low-index layer composition also can contain other composition as required.
As other composition above-mentioned, such as, can enumerate Photoepolymerizationinitiater initiater, levelling agent, crosslinking chemical, hardening agent, polymerization accelerant, viscosity modifier, antistatic agent, resin other than the above etc.
As above-mentioned Photoepolymerizationinitiater initiater, when above-mentioned low-index layer composition contains the resin system with free-radical polymerised unsaturated group, acetophenones can be enumerated (such as, as the 1-hydroxy-cyclohexyl-phenyl-one that trade name Irgacure184 (manufacture of BASF society) is commercially available), benzophenone, thioxanthene ketone, benzoin, benzoin methylether etc., they can be used alone, and also two or more can be share.
In addition, when above-mentioned low-index layer composition contains the resin system with cationically polymerizable functional group, as above-mentioned Photoepolymerizationinitiater initiater, such as aromatic diazonium salt, aromatic series sulfonium salt, aromatic iodonium salts, metallocene compound, benzoin sulphonic acid ester etc. can be enumerated, they can be used alone, and also two or more can be share.Specifically, can enumerate: Irgacure 184, Irgacure 907 that Ciba Specialty Chemicals society manufactures, Irgacure 369, Irgacure 379, Irgacure 819, Irgacure 127, Irgacure 500, Irgacure 754, Irgacure 250, Irgacure 1800, Irgacure 1870, Irgacure OXE01, DAROCURTPO, DAROCUR1173; SpeedcureMBB, SpeedcurePBZ, SpeedcureITX, SpeedcureCTX, SpeedcureEDB, EsacureONE, EsacureKIP150, EsacureKTO46 that SiberHegner society of Japan manufactures; KAYACUREDETX-S, KAYACURECTX, KAYACUREBMS, KAYACUREDMBI etc. that chemical drug society of Japan manufactures.Wherein preferred Irgacure 369, Irgacure 127, Irgacure907, EsacureONE, SpeedcureMBB, SpeedcurePBZ, KAYACUREDETX-S.
Relative to solid constituent 100 mass parts of above-mentioned adhesive resin, the addition of above-mentioned Photoepolymerizationinitiater initiater is preferably 0.1 mass parts ~ 10 mass parts.
Above-mentioned levelling agent, crosslinking chemical, hardening agent, polymerization accelerant, viscosity modifier, antistatic agent, other resin can use known material.
As the viscosity of above-mentioned low-index layer composition, the 0.5 ~ 5mPas (25 DEG C) of preferred coating preferably can be obtained.By selecting above-mentioned range of viscosities, the excellent antireflection performance of luminous ray can be realized, the film without crawling can be formed uniformly, and adaptation low-index layer excellent especially can be formed.This viscosity is more preferably 0.7 ~ 3mPas (25 DEG C).
Thickness (nm) d of low-index layer apreferably meet following formula (1):
d A＝mλ/(4n A) (1)
(in above-mentioned formula:
N arepresent the refractive index of low-index layer;
M represents positive odd number, preferably represents 1;
λ is wavelength, is preferably the value of 480nm ~ 580nm scope).
In addition, according to the present invention, from the viewpoint of antiradar reflectivity, preferred low-index layer meets following mathematical expression (2):
120<n Ad A<145 (2)。
Preparation method as above-mentioned low-index layer composition is not particularly limited, such as, by the compositions such as above-mentioned hollow silica particles, adhesive resin and the solvent added as required, Photoepolymerizationinitiater initiater are carried out mixing to obtain.Mixing can use the known methods such as coating rocker or ball mill.
Above-mentioned low-index layer can be formed as follows: be coated with above-mentioned low-index layer composition on hard conating described later or on the glass substrate of touch-screen to form film, as required by this dried coating film, utilize the irradiation of ionizing ray and/or heating to make curing of coating, thus form this low-index layer.
Coating process as above-mentioned low-index layer composition is not particularly limited, such as, can enumerate the various method such as spin-coating method, infusion process, spray-on process, mould painting method, stick coating method, rolling method, meniscus rubbing method, aniline printing method, silk screen print method, drop rubbing method.
In the optical laminate of band touch-screen of the present invention, above-mentioned blooming is sequentially lamination hard conating and above-mentioned low-index layer (low-index layer (A)) on a face of Mght-transmitting base material.
Above-mentioned Mght-transmitting base material preferably possesses flatness, thermotolerance, mechanical strength.As the concrete example of the material of formation Mght-transmitting base material, the such as thermoplastic resin such as polyester (polyethylene terephthalate, PEN), cellulose triacetate, cellulose diacetate, cellulose acetate-butyrate, polyamide, polyimide, polyethersulfone, polysulfones, polypropylene, polymethylpentene, Polyvinylchloride, Pioloform, polyvinyl acetal, polyetherketone, polymethylmethacrylate, polycarbonate or polyurethane can be enumerated.Preferably can enumerate polyester (polyethylene terephthalate, PEN), cellulose triacetate.
In above-mentioned Mght-transmitting base material, above-mentioned thermoplastic resin preferably uses with the membranous body making flexibility, as requested the use-pattern of curability, also can use the plate of these thermoplastic resins or use the tabular body of glass plate.
In addition, as above-mentioned Mght-transmitting base material, amorphous olefin polymkeric substance (Cyclo-Olefin-Polymer:COP) film with alicyclic structure can be enumerated.It is the use of the base material of cyclic olefin based polymer, cyclic conjugated diene based polymer, alicyclic vinyl ring type hydrocarbon polymer etc. of norbornene-based polymer, monocycle, can enumerate such as: ZEONEX or ZEONOR (norbornene resin) that Japanese Zeon society manufactures; The SUMILIT FS-1700 that SUMITOMO BAKELITE society manufactures; The ARTON (modification norbornene resin) that JSR society manufactures; The APEL (cyclic olefin copolymer) that Mitsui Chemicals society manufactures; The Topas (cyclic olefin copolymer) that Ticona society manufactures; Hitachi changes into the OPTOREZOZ-1000 series (ester ring type acrylic resin) etc. that society manufactures.
In addition, as the replacement base material of triacetyl cellulose, the FV series (low birefringence, low modulus of photoelasticity film) of also chemistry society of preferred Asahi Chemical Industry manufacture.
As the thickness of above-mentioned Mght-transmitting base material, be preferably 5 μm ~ 300 μm, more preferably lower limit is 20 μm, the upper limit is 200 μm.When Mght-transmitting base material is tabular body, the thickness of these thickness also can be above.When above-mentioned Mght-transmitting base material is formed hard conating described later etc., in order to improve cementability, except carrying out the physical treatment such as Corona discharge Treatment, atmospheric plasma treatment, oxidation processes, anchoring agent can also be coated with in advance or be called as the coating of priming paint.In addition, when the material of above-mentioned Mght-transmitting base material is triacetyl cellulose, the chemical treatments such as alkali treatment (saponification process) can also be carried out in advance.
As above-mentioned hard conating, refer to the hardness demonstrating more than 2H in the pencil hardness test of JIS K5600-5-4 (1999) defined.Above-mentioned hardness is more preferably more than 3H.Further, the thickness (during solidification) as above-mentioned hard conating is 0.1 μm ~ 100 μm, is preferably 0.8 μm ~ 20 μm.
Be not particularly limited as above-mentioned hard conating, such as, can enumerate the layer formed by the composition for hard coat containing resin and any composition.
As above-mentioned resin, be suitable for the resin using the transparency, specifically, can enumerate: as the ionizing radiation curable resin of the resin solidified by ultraviolet or electron ray; The potpourri of ionizing radiation curable resin and solvent-dry type resin (only making to be adjust the solvent seasoning that solids content adds can form the such resin of overlay film when being coated with); Or thermohardening type resin etc., preferably can enumerate ionizing radiation curable resin.
As the concrete example of above-mentioned ionizing radiation curable resin, the material with acrylic ester functional group can be enumerated, such as, can enumerate oligomer or prepolymer, the reactive diluent etc. of (methyl) acrylate of the polyfunctional compounds such as the vibrin of lower molecular weight, polyether resin, acrylic resin, epoxy resin, carbamate resins, alkyd resin, spiral shell acetal resin, polybutadiene, polythiol-polyenoid resin, polyvalent alcohol etc.
When above-mentioned ionizing radiation curable resin uses as ultraviolet curing resin, preferably use Photoepolymerizationinitiater initiater.
As above-mentioned Photoepolymerizationinitiater initiater, such as, can enumerate acetophenones, benzophenone, Michaelis benzoylbenzoic acid ester (Michler'sbenzoyl benzoate), α-A meter Luo Ji ester (α-amyloxim ester), tetramethylthiuram monosulfide, thioxanthene ketone etc.
In addition, preferably mixing photosensitizer uses, and as its concrete example, such as, can enumerate n-butylamine, triethylamine, many normal-butyls phosphine (ホ ソ Off ィ Application) etc.
As the solvent-dry type resin used with above-mentioned ionizing radiation curable mixed with resin, mainly can enumerate thermoplastic resin, be not particularly limited as this thermoplastic resin, existing known material can be used.
By adding above-mentioned solvent-dry type resin, the paint film defect of coated face effectively can be prevented.According to optimal way of the present invention, when the material of Mght-transmitting base material is the cellulose-based resins such as cellulose triacetate, as the preferred concrete example of thermoplastic resin, cellulose-based resin can be enumerated, such as cellulose nitrate, cellulose acetate, cellulose acetate-propionate, ethylhydroxyethylcellulose etc.
As above-mentioned heat-curing resin, such as, can enumerate phenol resin, carbamide resin, diallyl phthalate resin, melamine (メ ラ ニ Application) resin, guanamine resin, unsaturated polyester resin, urethane resin, epoxy resin, amino-alkyd resin, melamine-urea aldehyde cocondensation resin, silicones, polyorganosiloxane resin etc.
When using above-mentioned heat-curing resin, the hardening agent such as crosslinking chemical, polymerization initiator, polymerization accelerant, solvent, viscosity modifier etc. can be added as required further and using.
Above-mentioned hard conating can be formed as follows: be coated on above-mentioned Mght-transmitting base material by the composition for hard coat using above-mentioned each material to prepare and form film, formed film is carried out drying as required, make it solidify by ionizing radiation exposure or heating etc., form this hard conating thus.It should be noted that, the preparation method of above-mentioned composition for hard coat can enumerate the method identical with above-mentioned low-index layer with the formation method etc. of film.
Above-mentioned hard conating can contain the low coiled material of high rigidity etc. such as known antistatic agent, high index of refraction agent, colloidal silica further.
The above-mentioned blooming defining the structure of above-mentioned hard conating between above-mentioned Mght-transmitting base material and low-index layer (A) can for defining the structure of antistatic layer further between above-mentioned hard conating and Mght-transmitting base material or low-index layer, and this antistatic layer is formed by known antistatic agent and adhesive resin.
The total light transmittance of above-mentioned blooming is preferably more than 90%.If be less than 90%, then when the optical laminate of band touch-screen of the present invention is installed on display screen surface, color reprodubility or observability may be impaired.Above-mentioned total light transmittance is more preferably more than 95%, more preferably more than 96%.
The mist degree of above-mentioned blooming is preferably less than 1%, is more preferably less than 0.5%.
The manufacture method of above-mentioned blooming can enumerate following method, and the method has be coated with above-mentioned composition for hard coat to form the operation of hard conating and to be coated with above-mentioned low-index layer composition to form the operation of low-index layer on formed hard conating on Mght-transmitting base material.
As forming the method for above-mentioned hard conating and low-index layer as described above.
Above-mentioned touch-screen possesses above-mentioned low-index layer (low-index layer (B)) on one face.
Be not particularly limited as above-mentioned touch-screen, such as can enumerate following structure: use 2 electrode films being formed with the nesa coatings such as ITO on surface, make each electrode film opposed according to the aspectant mode in nesa coating side, utilize spacer (ス ペ ー サ) etc. separate certain interval to form, form above-mentioned low-index layer (B) in non-input side with the surface of the nesa coating opposition side of electrode film.
It should be noted that, as the component parts beyond the low-index layer (B) of above-mentioned touch-screen, can use the parts same with existing known touch-screen, described existing known touch-screen is used as the input media be installed on the picture of the display device such as display panels.
In addition, above-mentioned touch-screen also can for the formation with the surface of the nesa coating opposition side of electrode film by adhesive linkage sequentially lamination Mght-transmitting base material, hard conating and low-index layer (B) in the same manner as above-mentioned blooming in above-mentioned non-input side.As the bonding agent forming above-mentioned adhesive linkage, such as, even if preferably by the optics such as Mght-transmitting base material or polaroid bonding agent that is bonding and that also can not foam under being placed in high temperature, super-humid conditions securely, preferably acrylic acid series bonding agent can be used.
Such touch-screen can be arbitrary forms such as electrostatic capacity type, optical profile type, ultrasonic type, thin-film electro resistive.
In the optical laminate of band touch-screen of the present invention, above-mentioned blooming and touch-screen are disposed facing according to above-mentioned low-index layer (A) and above-mentioned low-index layer (B) aspectant mode under the state each other with gap.
The gap formed as above-mentioned blooming and touch-screen is not particularly limited, and such as can be suitable for being adjusted to the existing known gap be equipped with in the liquid crystal panel of touch-screen is the scope of equal extent.Further, above-mentioned blooming and touch-screen method arranged opposite are also not particularly limited, existing known method can be enumerated.
For the optical laminate of band touch-screen of the present invention, by the surface utilizing Stratificated treatment etc. the Mght-transmitting base material side of above-mentioned blooming to be arranged on polarizer, polaroid can be made.Such polaroid is also one of the present invention: it is the polaroid possessing polarizer, possesses the optical laminate of band touch-screen of the present invention on above-mentioned polarizer surface.
Be not particularly limited as above-mentioned polarizer, such as, can use and dye and the polyvinyl alcohol film stretched, polyvinyl formal film, Polyvinyl acetal film, vinyl-vinyl acetate copolymer system saponification film etc. through iodine etc.
In the Stratificated treatment of the optical laminate of above-mentioned polarizer and band touch-screen of the present invention, preferably saponification process is carried out to Mght-transmitting base material (preferred tri acetyl cellulose membrane).By saponification process, cementability can be made well, also can to obtain antistatic effect.
The invention still further relates to image display device, it possesses the optical laminate of above-mentioned band touch-screen or above-mentioned polaroid.
Above-mentioned image display device can be the image display device such as LCD, PDP, FED, ELD (organic EL, inorganic EL), CRT, panel computer, touch-screen, Electronic Paper.
LCD as above-mentioned typical example possess permeability display body and from the back side to the light supply apparatus that above-mentioned permeability display body is irradiated.When image display device of the present invention is LCD, the surface of this permeability display body forms the optical laminate of band touch-screen of the present invention or polaroid of the present invention.
When the present invention is the liquid crystal indicator of the optical laminate with above-mentioned band touch-screen, the light source of light supply apparatus irradiates from the downside of optical laminate.It should be noted that, can insertion phase difference plate between liquid crystal display cells and polaroid.Cement layers can be set as required at each interlayer of this liquid crystal indicator.
PDP as above-mentioned image display device possesses watch crystal substrate (at table surface forming electrode) and back glass substrate (is showing surface forming electrode and small groove, in groove, be formed with the luminescent coating of red, green, blue), this back glass substrate opposed with this watch crystal substrate and between be sealed with discharge gas to configure.When image display device of the present invention is PDP, its surface at above-mentioned watch crystal substrate or its front panel (glass substrate or film substrate) possess the optical laminate of above-mentioned band touch-screen.
Above-mentioned image display device can also be the image display device such as ELD device or CRT, and ELD device is that when evaporation applies voltage on the glass substrate, the luminophor such as irradiative zinc sulphide, Diamines material the voltage controlling to be applied to substrate carry out the device shown; CRT converts electrical signals to light, produces the device of the visible image of human eye.In this case, the outmost surface of above-mentioned each display device or the surface of its front panel possesses the optical laminate of above-mentioned band touch-screen.
In either case, the display screen that image display device of the present invention all can be used for televisor, computing machine, Electronic Paper, panel computer etc. represents.Particularly can suitably for the surface of CRT, liquid crystal panel, the contour precise image display screen of PDP, ELD, FED.
[effect of invention]
In the optical laminate of band touch-screen of the present invention, owing to form respectively specific concaveconvex shape at blooming with the surface of the relative low-index layer of touch-screen, thus fully can suppress the generation of Newton ring, high-grade display image can be obtained.
Therefore, the optical laminate of band touch-screen of the present invention can suitably for leonard's tube display device (CRT), LCDs (LCD), plasma display panel (PDP) (PDP), electroluminescent display panel (ELD), Field Emission Display screen (FED), Electronic Paper, panel computer etc.
[accompanying drawing explanation]
Fig. 1 is the sectional view of an example of the optical laminate schematically showing band touch-screen of the present invention.
[embodiment]
By following embodiment, content of the present invention is described, but and is not interpreted as content of the present invention is defined in these embodiments.State as long as no Te Do, " part " and " % " is quality criteria.
(embodiment 1)
(making of blooming)
Prepare Mght-transmitting base material (tri cellulose acetate membrane, thickness 60 μm, the manufacture of film society of Fuji, TD60ULP), be coated with the composition for hard coat of composition as follows at the one side of this Mght-transmitting base material, form film.
Next, for formed film, make the dry air of 70 DEG C with the flow rate 15 seconds of 0.2m/s, make the dry air of 70 DEG C within 30 seconds, carry out drying with the flow rate of 10m/s afterwards further, thus the solvent in film is evaporated.
Thereafter use ultraviolet lamp (Fusion UV Systems Japan society manufacture, light source H bulb), be 50mJ/cm according to accumulated light under nitrogen atmosphere (below oxygen concentration 200ppm) 2irradiation ultraviolet radiation makes curing of coating, thus forms the hard conating that thickness is 10 μm (during solidifications).
(composition for hard coat)
Urethane acrylate (UV1700B, synthesis society of Japan manufacture) 50 mass parts
Polyester acrylate (M9050, East Asia synthesis society manufacture) 50 mass parts
Polymerization initiator (Irgacure 184; BASF society manufactures) 4 mass parts
Methyl ethyl ketone 150 mass parts
The low-index layer (A) composition (1) being 0.1 μm of following composition of coating according to the thickness after dry (50 DEG C × 1 minute) on the surface of formed hard conating forms film.After this dried coating film, use ultraviolet lamp (Fusion UV Systems Japan society manufacture, light source H bulb), be 100mJ/cm by accumulated light under nitrogen atmosphere (below oxygen concentration 200ppm) 2carry out Ultraviolet radiation, make it solidify to form low-index layer (A), obtain blooming.
(low-index layer (A) composition (1))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 140 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 55 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 30 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
A face of Mght-transmitting base material (tri cellulose acetate membrane, thickness 60 μm, film society of Fuji manufacture, TD60ULP) is that 0.1 μm of coating low-index layer (A) forms film with composition (1) according to the thickness after dry (50 DEG C × 1 minute).After this dried coating film, ultraviolet lamp (Fusion UV Systems Japan society manufacture, light source H bulb) is used to be 100mJ/cm by accumulated light under nitrogen atmosphere (below oxygen concentration 200ppm) 2carrying out Ultraviolet radiation makes it solidify, and forms the low-index layer (B) with low-index layer (A) with same concaveconvex shape.And by the substrate bonding of the adhesive linkage formed by acrylic acid series bonding agent by Mght-transmitting base material and touch panel sensor, the bonding plane of Mght-transmitting base material is the face with low-index layer (B) opposition side, side, thus manufactures touch-screen.
Be 0.3mm according to the gap of low-index layer (A) and low-index layer (B), make obtained blooming and touch-screen arranged opposite, the optical laminate of fabricated ribbon touch-screen.
(embodiment 2)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (2), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (2))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 140 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 55 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 30 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(embodiment 3)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (3), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (3))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 160 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 55 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 30 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(embodiment 4)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (4), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (4))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 70 mass parts
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 70 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 55 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 30 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(embodiment 5)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (5), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (5))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 160 mass parts
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 100 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(embodiment 6)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (6), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (6))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 140 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 65 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 20 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(embodiment 7)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (7), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (7))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 160 mass parts
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 100 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(embodiment 8)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (8), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (8))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 140 mass parts
Solid silicon dioxide microparticle (mean grain size: 250nm) (manufacture of CIK Nano Tek society) 5 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 55 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 30 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 1)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (9), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (9))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 120 mass parts
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 100 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 2)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (10), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (10))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 140 mass parts
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 100 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 3)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (11), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (11))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 120 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 70 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 10 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 20 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 4)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (12), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (12))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 110 mass parts
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 100 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 5)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (13), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (13))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 80 mass parts
Trimethylolpropane triacrylate (TMP-A) (chemistry society of Xie Rong society manufactures) 100 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 6)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (14), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (14))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 60 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 55 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 30 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 7)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (15), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (15))
Hollow silica particles (mean grain size: 50nm) (wave catalyst day and change into society's manufacture) 200 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 15 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 55 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 30 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
(comparative example 8)
Using except not using low-index layer (A) composition (1) except following low-index layer (A) composition (16), utilizing the method identical with embodiment 1 to make blooming.Except the blooming that use obtains, the optical laminate of fabricated ribbon touch-screen similarly to Example 1.
(low-index layer (A) composition (16))
Hollow silica particles (mean grain size: 60nm) (wave catalyst day and change into society's manufacture) 120 mass parts
Fluoropolymer (JN35) (manufacture of JSR society) 30 mass parts (solid content)
Fluorochemical monomer (LINC3A) (chemistry society of Xie Rong society manufactures) 60 mass parts (solid content)
Pentaerythritol triacrylate (PETA) (Japanese chemical drug society manufactures) 10 mass parts
Polymerization initiator (Irgacure 127) (manufacture of BASF society) 7 mass parts
Modified silicon oil (X22164E) (chemistry society of SHIN-ETSU HANTOTAI manufactures) 5 mass parts
Methyl isobutyl ketone 7000 mass parts
Propylene glycol methyl ether acetate 800 mass parts
Optical laminate for the band touch-screen manufactured in embodiment and comparative example carries out following evaluation.The results are shown in table 1.
(reflection Y value)
About the reflection Y value on the surface (B) of the surface (A) of the low-index layer (A) of each blooming made in embodiment and comparative example and the low-index layer (B) of touch-screen, use the MPC3100 spectrophotometer that society of Shimadzu Seisakusho Ltd. manufactures, wavelength coverage till 380nm ~ 780nm measures 5 ° of normal reflection rates, utilizes thereafter and can convert as the software (MPC3100 is built-in) of the brightness of people's eye institute perception calculates.It should be noted that, when measuring, in order to prevent backside reflection, pasting black tape (Si Gang society manufactures) in the side contrary with the mensuration face of blooming and touch-screen.
(10 mean roughness (Rz) in low-index layer (A) and average slope angle (Δ a))
Use atomic force microscope (the Atomic Force Microscope that SII Nanotechnology society manufactures; AFM) L-trace, at software: the interpretive model in SPIWin: under SPIWin exchange model, (Δ a) for 10 mean roughness (Rz) in mensuration low-index layer (A) and average slope angle.SPIWin exchange model is the analytical form of carrying out three-dimensional extended based on nineteen eighty-two version JIS standard (JIS B0601:1982).
(presence or absence of Newton ring)
For the optical laminate of the band touch-screen manufactured in embodiment and comparative example, be 1cm for the interval separating 70mm from touch-screen side according to setting area respectively under darkroom, Na lamp source 2the presence or absence of Newton ring when placing the counterweight of 2 300g and when placing the counterweight of 2 350g is observed, and evaluates by following benchmark.It should be noted that, the different 2 kinds of counterweights of operating weight carry out evaluation be because: a bit increasing the weight of on touch-screen is difficult to observe Newton ring, and in 2 of employing 2 counterweights increase the weight of, if to observing between 2 counterweights, then easily observes Newton ring.
The counterweight of ◎: 300g and the counterweight of 350g are showed no Newton ring
Zero: when placing the counterweight of 350g, see Newton ring simplely
△: when placing the counterweight of 300g, see Newton ring simplely
×: when placing the counterweight of 300g, obviously see Newton ring
(mar resistance)
For the low-index layer (A) of the optical laminate of the band touch-screen manufactured in embodiment and comparative example, use the steel wool of No. #0000 at friction load 200g/cm 2with 100g/cm 2under carry out 10 reciprocating frictions, visualization is with or without scar afterwards, evaluates by following benchmark.
◎: at 200g/cm 2with 100g/cm 2lower all without scar
Zero: at 100g/cm 2lower to scar
×: at 100g/cm 2under have scar
As shown in table 1, in the optical laminate of the band touch-screen of embodiment, do not observe Newton ring, and mar resistance is also excellent.
On the other hand, in the optical laminate of the band touch-screen of comparative example, Newton ring and mar resistance are all unexcellent.It should be noted that, in the optical laminate of the band touch-screen of comparative example 7, the average slope angle of low-index layer (A) is large, in addition, in the optical laminate of the band touch-screen of comparative example 8,10 mean roughness of low-index layer (A) are large, and mar resistance is all inferior to the optical laminate of the band touch-screen of embodiment.
It should be noted that, the optical laminate of the band touch-screen of embodiment 3,4 is identical value with the reflection Y value of the optical laminate of the band touch-screen of embodiment 5, and compared with the optical laminate of the band touch-screen of embodiment 5, the optical laminate of the band touch-screen of the embodiment 3,4 that the average slope angle Δ a of low-index layer (A) is larger has the inhibition that more excellent Newton ring occurs.
And, the optical laminate of the band touch-screen of embodiment 6 and the average slope angle Δ a of the low-index layer (A) of the optical laminate of the band touch-screen of embodiment 7 are the average slope angle Δ a of the low-index layer (A) of the optical laminate of the optical laminate of the band touch-screen of identical value and embodiment 3 and the band touch-screen of embodiment 8 is identical value, compared with the optical laminate of the band touch-screen of embodiment 8, the optical laminate of the band touch-screen of the embodiment 3 that reflection Y value is less has the inhibition of more excellent Newton ring generation.
And, the average slope angle Δ a of the low-index layer (A) of the optical laminate of the optical laminate of the band touch-screen of comparative example 1 and the band touch-screen of comparative example 3 is 4 °, for smaller value, and compared with the optical laminate of the band touch-screen of comparative example 1, the inhibition that the Newton ring of the optical laminate of the band touch-screen of the comparative example 3 that reflection Y value is less occurs is improved.
In addition, about the optical laminate of the band touch-screen of comparative example 6, reflection Y value is 2.0%, and be higher value, and the average slope angle Δ a of low-index layer (A) being 10 °, is higher value, and the inhibition that therefore Newton ring occurs is improved.
[industrial applicibility]
The optical laminate of band touch-screen of the present invention, owing to comprising above-mentioned formation, thus fully can suppress the generation of Newton ring, can obtain high-grade display image.Therefore, the optical laminate of band touch-screen of the present invention can be applied to leonard's tube display device (CRT), LCDs (LCD), plasma display panel (PDP) (PDP), electroluminescent display panel (ELD), Field Emission Display screen (FED), Electronic Paper, panel computer etc. suitably.
[explanation of symbol]
The optical laminate of 10 band touch-screens
11 bloomings
12 Mght-transmitting base material
13 hard conatings
14 low-index layers (A)
15 touch-screens
16 low-index layers (B)

Claims (7)

1. the optical laminate with touch-screen, it is the optical laminate of blooming and touch-screen band touch-screen arranged opposite, this blooming is the blooming of sequentially lamination hard conating and low-index layer (A) on a face of Mght-transmitting base material, this touch-screen is the touch-screen possessing low-index layer (B) on one face, the feature of the optical laminate of this band touch-screen is
Above-mentioned blooming and above-mentioned touch-screen are disposed facing under the state each other with gap, to make above-mentioned low-index layer (A) face-to-face with above-mentioned low-index layer (B);
Be formed concavo-convex on the surface (B) of the surface (A) of above-mentioned low-index layer (B) side of above-mentioned low-index layer (A) and above-mentioned low-index layer (A) side of above-mentioned low-index layer (B);
The reflection Y value on above-mentioned surface (A) and surface (B) is more than 0.1% and is less than 1.5%;
10 concavo-convex mean roughness (Rz) on above-mentioned surface (A) and surface (B) are 20nm ~ 90nm, (Δ is a) 5 ° ~ 20 ° to average slope angle.
2. the optical laminate of band touch-screen as claimed in claim 1, wherein, low-index layer (A) and low-index layer (B) are containing hollow silica particles and the contain fluorine atoms resin as adhesive resin.
3. the optical laminate of band touch-screen as claimed in claim 2, wherein, in low-index layer (A) and low-index layer (B), relative to solid constituent 100 mass parts of adhesive resin, the content of hollow silica particles is 80 mass parts ~ 200 mass parts.
4. be with the optical laminate of touch-screen as claimed in claim 2 or claim 3, wherein, low-index layer (A) and low-index layer (B) are the solid silicon dioxide microparticle of 80nm ~ 300nm further containing mean grain size.
5. a polaroid, it is the polaroid possessing polarizer, it is characterized in that, this polaroid possesses the optical laminate of the band touch-screen described in claim 1,2,3 or 4 on above-mentioned polarizer surface.
6. an image display device, is characterized in that, it possesses the optical laminate of the band touch-screen described in claim 1,2,3 or 4 or polaroid according to claim 5.
7. the suppressing method of a Newton ring generation, the method is the method using the suppression Newton ring of the optical laminate of band touch-screen to occur, the optical laminate of this band touch-screen is the optical laminate of the band touch-screen that blooming and touch-screen are disposed facing, this blooming is the blooming of sequentially lamination hard conating and low-index layer (A) on a face of Mght-transmitting base material, this touch-screen is the touch-screen possessing low-index layer (B) on one face
The method is characterized in that,
Above-mentioned blooming and above-mentioned touch-screen are disposed facing under the state each other with gap, to make above-mentioned low-index layer (A) face-to-face with above-mentioned low-index layer (B),
Be formed concavo-convex on the surface (B) of the surface (A) of above-mentioned low-index layer (B) side of above-mentioned low-index layer (A) and above-mentioned low-index layer (A) side of above-mentioned low-index layer (B);
The reflection Y value on above-mentioned surface (A) and surface (B) is more than 0.1% and is less than 1.5%;
10 concavo-convex mean roughness (Rz) on above-mentioned surface (A) and surface (B) are 20nm ~ 90nm, (Δ is a) 5 ° ~ 20 ° to average slope angle.
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