CN108431641A

CN108431641A - Optical film, polarizing coating, the manufacturing method of polarizing coating and image display device

Info

Publication number: CN108431641A
Application number: CN201680076327.4A
Authority: CN
Inventors: 岩崎迅希; 岩田行光; 大石英司; 本田和也
Original assignee: Dai Nippon Printing Co Ltd
Current assignee: Dai Nippon Printing Co Ltd
Priority date: 2015-10-30
Filing date: 2016-10-28
Publication date: 2018-08-21
Anticipated expiration: 2036-10-28
Also published as: TWI751985B; CN108431641B; JPWO2017073756A1; TW201731677A; JP6856028B2; WO2017073756A1; KR20180075592A

Abstract

The polarizing coating and image display device that the present invention provides a kind of uniform and flat optical film in surface, has the optical film.According to one method of the present invention, optical film 10 is provided, it is that have translucency functional layer 11, optical film 10 without base material, wherein, the surface 11A of translucency functional layer 11 forms the surface 10A of optical film 10, in 1 μm of square on the surface of translucency functional layer 11 11 and the region of 5 μm of square, arithmetic average roughness (Ra) is respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz) is respectively 4nm or more 20nm hereinafter, maximum crest height (Rp) is respectively 2nm or more 15nm or less.

Description

Optical film, polarizing coating, the manufacturing method of polarizing coating and image display device

The reference of related application

The application enjoys the Japanese Patent Application 2015-214621 (applyings date as first Japanese patent application：In October, 2015 30 days), the Japanese Patent Application 2015-214627 (applyings date：On October 30th, 2015) and Japanese Patent Application 2016-77046 (applications Day：On April 7th, 2016) priority interests, the disclosure of which as part of this specification entirely through reference.

Technical field

The present invention relates to optical film, polarizing coating, the manufacturing method of polarizing coating and image display devices.

Background technology

Back and forth, it is known to which smart mobile phone, tablet terminal etc. have the image display device and TV of touch panel Deng the image display device for not having touch panel.These image display devices are provided with the display surface as liquid crystal display panel Plate.Display panel compared with the display elements such as liquid crystal cells the person of closer looking at side be configured with polarizing film (upper polarizer).Partially The piece that shakes usually by polarizer and fits in the two-sided of polarizer and for protecting the protective film of polarizer to constitute, this is partially The element that shakes is made of the polyvinyl alcohol resin film dyed using iodine or dichroism pigment and after being uniaxially stretched.

In the image display device for having touch panel, touch panel is configured on a display panel, is touched using finger etc. Picture display face is touched so as to directly input information.

Touch panel is fixed on display panel, as its fixing means, there are via air layer by touch panel with The fixed the air gap mode of display panel and via translucency adhesive linkage by touch panel with display panel is fixed directly connects Conjunction mode (such as Japanese Unexamined Patent Publication 2014-130290 bulletins).

In the mode of the air gap, due to the difference and air layer and display surface of the refractive index of touch panel and air layer The difference of the refractive index of plate, it is possible to reflection occur and visual reduction in respective interface light.Therefore, now, directly connect The image display device of conjunction mode is increasing.

Invention content

Problem to be solved by the invention

But the surface of the display panel in the image display device for having touch panel is usually provided with and has for carrying The optical film of the hard conating of high marresistance, in addition, the table of the display panel in the image display device for not having touch panel Face is usually provided with the optical film for the low-index layer for having hard conating or hard conating and the reflection for preventing exterior light.This A little optical films are also functioned as the protective film of polarizing film.

In the image display device of direct juncture, hydrophilic translucency adhesive linkage is coated on the surface of hard conating With composition, therefore, it is desirable to which the contact angle relative to water is small.Here, the hard conating small relative to the contact angle of water in order to obtain, It is preferred that the surface of hard conating is uniform and flat.

Now, uniform and flat surface in order to obtain, adds levelling agent, but present situation is, levelling agent in hard conating It is difficult to be precipitated on surface, in addition, become island shape surface is precipitated even if levelling agent, therefore it is uniform and flat to obtain surface The hard conating in face.

In addition, in image display device, the peripheral portion of optical film is covered by the framework of black, still, in order to make figure As display device extinguishing when the tone of picture become more black to realize that there are a body-sensings with the framework of image display device Design, it is expected that the low-index layer that surface is uniform and flat.

In addition, now, the slimming of image display device is carrying out, and therefore, is assembled in the polarization of image display device Piece is also desirable that slimming.

The present invention was completed to solve the above problem.I.e., and it is an object of the present invention to provide the uniform and flat optics in surface Film, the polarizing coating and image display device for having the optical film.In addition, and it is an object of the present invention to provide the polarization of slimming can be realized Manufacturing method, polarizing coating and the image display device of film.

The means used to solve the problem

According to one method of the present invention, a kind of optical film is provided, is to have translucency functional layer, the light without base material Learn film, wherein a face of above-mentioned translucency functional layer forms the surface of above-mentioned optical film, in the upper of above-mentioned translucency functional layer State in 1 μm of square in a face and the region of 5 μm of square, arithmetic average roughness (Ra) be respectively 0.5nm or more 1.5nm with Under, maximum height of the profile (Rz) be respectively 4nm or more 20nm hereinafter, maximum crest height (Rp) be respectively 2nm or more 15nm with Under.

In above-mentioned optical film, lamination can be further equipped in the sandwich layer of another surface side of above-mentioned translucency functional layer.

In above-mentioned optical film, can be above-mentioned translucency functional layer film thickness be 2 μm or more 15 μm hereinafter, and above-mentioned The film thickness of sandwich layer is 5 μm or more 40 μm or less.

In above-mentioned optical film, above-mentioned translucency functional layer can contain inorganic particle.

In above-mentioned optical film, above-mentioned inorganic particle can be special-shaped silica dioxide granule.

In above-mentioned optical film, above-mentioned translucency functional layer can be hard conating.

Can be that above-mentioned translucency functional layer has hard conating and is formed in the one of above-mentioned hard conating in above-mentioned optical film A surface side and refractive index less than the refractive index of above-mentioned hard conating low-index layer, and the surface of above-mentioned low-index layer at For the said one face of above-mentioned translucency functional layer.

In above-mentioned optical film, the face opposite side with translucency functional layer side in above-mentioned sandwich layer can be further equipped with Face on the cementability that is arranged improve layer.

In above-mentioned optical film, the tensile break strength of above-mentioned optical film can be 30N/mm²More than.

In above-mentioned optical film, the contact angle relative to water on the surface that the above-mentioned cementability after saponification process improves layer can Think 80 ° or less.

In above-mentioned optical film, above-mentioned cementability, which improves layer, can contain binder resin and silane coupling agent, the bonding Agent resin includes the solidfied material of ionizing ray polymerizable compound.

In above-mentioned optical film, above-mentioned ionizing ray polymerizable compound can be multifunctional ionizing ray polymerism list Body.

Another way according to the present invention provides a kind of polarizing coating, has above-mentioned optical film and is set to above-mentioned optics The polarizer with surface side opposite side of film.

Another way according to the present invention provides a kind of manufacturing method of polarizing coating, be have translucency functional layer and It is set to the manufacturing method of the polarizing coating of the polarizer of a surface side of above-mentioned translucency functional layer, wherein the manufacturing method Have：It is coated with the translucency functional layer composition containing curable resin precursor on a face of release film, makes it dry, To formed above-mentioned translucency functional layer composition film process；Make above-mentioned curing of coating to form above-mentioned translucency The process of functional layer；In the process for being bonded polarizer with release film side opposite side of above-mentioned translucency functional layer；With will be upper State the process that release film is removed from above-mentioned translucency functional layer.

In the manufacturing method of above-mentioned polarizing coating, it can be further equipped with above-mentioned before being bonded above-mentioned polarizer The process that sandwich layer is formed on the face with the face opposite side of release film side of photosensitiveness functional layer, above-mentioned polarizer fits in above-mentioned The face with the face opposite side of translucency functional layer side of sandwich layer.

In the manufacturing method of above-mentioned polarizing coating, the film thickness of above-mentioned translucency functional layer can be 2 μm or more 15 μm or less.

In the manufacturing method of above-mentioned polarizing coating, the film thickness of above-mentioned sandwich layer can be 5 μm or more 40 μm or less.

In the manufacturing method of above-mentioned polarizing coating, above-mentioned translucency functional layer composition can contain alkylene oxide and be modified third Olefin(e) acid ester.

In the manufacturing method of above-mentioned polarizing coating, above-mentioned alkylene oxide modification acrylate can be ethylene-oxide-modified propylene At least any one in acid esters and epoxy pronane modification acrylate.

In the manufacturing method of above-mentioned polarizing coating, above-mentioned translucency functional layer composition can further contain inorganic particulate Grain.

In the manufacturing method of above-mentioned polarizing coating, above-mentioned inorganic particle can be special-shaped silica dioxide granule.

Another way according to the present invention provides a kind of polarizing coating, for the polarizing coating of no base material, wherein the polarizing coating Have translucency functional layer and is set to the polarizer of a surface side of above-mentioned translucency functional layer.

In above-mentioned polarizing coating, it can be further equipped with and be set between above-mentioned translucency functional layer and above-mentioned polarizer Sandwich layer.

In above-mentioned polarizing coating, above-mentioned translucency functional layer can contain inorganic particle.

In above-mentioned polarizing coating, above-mentioned inorganic particle can be special-shaped silica dioxide granule.

Another way according to the present invention provides a kind of image display device, is that the image for having display panel is shown Device, wherein above-mentioned display panel has display element and is configured at the person of closer looking at side compared with above-mentioned display element Above-mentioned optical film or above-mentioned polarizing coating.

Invention effect

Optical film according to one method of the present invention can provide surface uniform and flat optical film.In addition, according to The another way of the present invention, can provide the polarizing coating and image display device for having such optical film.In addition, according to this The manufacturing method of the polarizing coating of the another way of invention and the polarizing coating of another way, may be implemented to be thinned.In addition, according to The another way of the present invention, can provide the image display device for having such polarizing coating.

Description of the drawings

Fig. 1 is the schematic configuration of the optical film of first embodiment.

Fig. 2 is the schematic configuration of another optical film of first embodiment.

Fig. 3 (A)~Fig. 3 (C) is the figure of the manufacturing process for the optical film for schematically showing first embodiment.

Fig. 4 (A) and Fig. 4 (B) is the figure of the manufacturing process for the optical film for schematically showing first embodiment.

Fig. 5 (A)~Fig. 5 (D) is the figure of the manufacturing process for another optical film for schematically showing first embodiment.

Fig. 6 is the schematic configuration of the polarizing coating of first embodiment.

Fig. 7 is the schematic configuration of another polarizing coating of first embodiment.

Fig. 8 (A)~Fig. 8 (C) is the figure of the manufacturing process for another polarizing coating for schematically showing first embodiment.

Fig. 9 is the schematic configuration of the image display device of first embodiment.

Figure 10 is the schematic configuration of the optical film of second embodiment.

Figure 11 is the schematic configuration of another optical film of second embodiment.

Figure 12 is the schematic configuration of the polarizing coating of second embodiment.

Figure 13 is the schematic configuration of another polarizing coating of second embodiment.

Figure 14 is the schematic configuration of the image display device of second embodiment.

Figure 15 is the schematic configuration of the polarizing coating of third embodiment.

Figure 16 (A)~Figure 16 (C) is the figure of the manufacturing process for the polarizing coating for schematically showing third embodiment.

Figure 17 (A)~Figure 17 (C) is the figure of the manufacturing process for the polarizing coating for schematically showing third embodiment.

Figure 18 is the figure of the manufacturing process for the polarizing coating for schematically showing third embodiment.

Figure 19 is the schematic configuration of the polarizing coating of the 4th embodiment.

Figure 20 (A)~Figure 20 (C) is the figure of the manufacturing process for the polarizing coating for schematically showing the 4th embodiment.

Figure 21 (A)~Figure 21 (C) is the figure of the manufacturing process for the polarizing coating for schematically showing the 4th embodiment.

Figure 22 (A)~Figure 22 (C) is the figure of the manufacturing process for the polarizing coating for schematically showing the 4th embodiment.

Specific implementation mode

[first embodiment]

Hereinafter, it is aobvious to be directed at the optical film of the first embodiment of the present invention, polarizing coating and image while refer to the attached drawing Showing device illustrates.In the present specification, the terms such as " film ", " piece " are only based on the difference for exhaling title, mutual Mei You Qu Do.Cause This, for example, " film " is used with the meaning for also including the component for being referred to as piece.In addition, " translucency " in this specification is to instigate Light penetrate property, it may for example comprise total light transmittance be 50% or more, preferably 70% or more, more preferably 80% or more, Particularly preferably 90% or more.Translucency not necessarily needs to be transparent, or translucent.Fig. 1 is present embodiment The schematic configuration of optical film, Fig. 2 are the schematic configurations of another optical film of present embodiment, and Fig. 3 and Fig. 4 are signals The figure of the manufacturing process of the optical film of present embodiment is shown to property, Fig. 5 is another light for schematically showing present embodiment Learn the figure of the manufacturing process of film.

<<<Optical film>>>

First, Fig. 1, optical film shown in Fig. 2 10,15 are that do not have base material, the i.e. optical film without base material.In this specification " base material " refer to becoming to be used to form the supporter of aftermentioned translucency functional layer and being made of thermoplastic resin or glass Film or piece.As base material, such as can enumerate：The acylated celluloses base material such as triacetyl cellulose；Cyclic olefin polymer base material gathers The polyester base materials such as carbonic ester base material, acrylic substrate, polyethylene terephthalate base material；Or glass baseplate.

Optical film 10 shown in FIG. 1 has translucency functional layer 11 and lamination in the sandwich layer 12 in translucency functional layer 11. But optical film 10 has translucency functional layer 11, may not possess sandwich layer 12.In addition, as optical film, and it is unlimited In optical film 10, have translucency functional layer 11, lamination in the core in translucency functional layer 11 as shown in Fig. 2, can also use Layer 12 and the cementability being set on the face with the face opposite side of 11 side of translucency functional layer of sandwich layer 12 improve the light of layer 13 Learn film 15.In the present specification, " translucency functional layer " refers to having translucency and playing certain function in optical film Layer.Specifically, the layer of translucency functional layer function such as can enumerate for playing hard painting propert or antireflection.Translucency Functional layer is not only single layer, or layer made of 2 layers or more laminations.Translucency functional layer is made of 2 layers or more laminations In the case of layer, function may be the same or different possessed by each layer.In the present embodiment, to light transmission sexual function Layer 11 for hard painting propert layer, i.e. hard conating the case where illustrate.Surface 10A, 15A of optical film 10,15 become light transmission The surface 11A of sexual function layer 11.The surface for becoming sandwich layer 12 with face, that is, back side 10B of surface 10A opposite side of optical film 10 12A, the surface 13A for becoming cementability raising layer 13 with face, that is, back side 15B of surface 15A opposite side of optical film 15.

From the viewpoint of the slimming of optical film 10,15, the thickness of optical film 10,15 is preferably less than 40 μm.For It is saturating using scanning electron microscope (SEM), transmission electron microscope (TEM) or scanning for the thickness of optical film 10,15 Emitting electron microscope (STEM) shoots the section of optical film 10,15, and optical film 10,15 at 20 are measured in the image in its section Thickness, find out the average value of the thickness at 20.From the viewpoint of the slimming of optical film 10,15, the thickness of optical film 10,15 More preferably less than 21 μm of degree, further preferably less than 15 μm, most preferably less than 10 μm.

Optical film 10,15 shown in FIG. 1 be formed as translucency functional layer 11, sandwich layer 12 double-layer structure, light shown in Fig. 2 It learns film 15 and is formed as the three-decker that translucency functional layer 11, sandwich layer 12, cementability improve layer 13, but the interface of each interlayer also may be used With not necessarily clear.In the case of the interface of each interlayer is unsharp, it can be analyzed by the ingredient to each layer to judge Translucency functional layer 11, sandwich layer 12 or translucency functional layer 11, sandwich layer 12 and cementability improve layer 13.

The tensile break strength of excellent toughness in order to obtain, optical film 10,15 is preferably 30N/mm²More than.Optical film 10, the measurement of 15 tensile break strength is as described below：According to JIS-K7161-1：2014, use Tensilon universal tests Machine, width be in the case that distance is 80mm between 25mm, collet with 300mm/ minutes test speeds stretch optical film come into Row, is applied to the stress of optical film as tensile break strength when optical film is broken.Tensile break strength is set as measuring 3 times Obtained from the arithmetic mean of instantaneous value that is worth.It should be noted that the tensile break strength of optical film 10,15 is set as will be aftermentioned The value measured in the state of release film stripping.The tensile break strength of optical film 10,15 is preferably 40N/mm²More than.

The moisture permeability of optical film 10,15 is preferably 100g/ (m²Above 400g/ (the m for 24 hours)²For 24 hours) below.If optics The moisture permeability of film is less than 100g/ (m²For 24 hours), it is likely that saponification, it is Nian Jie with water system bonding agent when remain in optical film There is moisture, because the residual moisture causes generating poor attachment when being bonded with polarizer；In addition, if it exceeds 400g/ (m²For 24 hours), then in the case of using Organic Light Emitting Diode (OLED) in display element, it is possible to the moisture warp in air It is deteriorated to Organic Light Emitting Diode, Organic Light Emitting Diode is reached because of moisture by optical film." moisture-inhibiting in this specification Degree " is as described below：Using the method for the moisture permeability test method (cup type method) recorded according to JIS Z0208-1976, it is set as Amount (g/ (the m by 24 hours vapor of optical film measured under 40 DEG C of temperature, the atmosphere of relative humidity 90%²·24h))。 Moisture permeability is set as the arithmetic mean of instantaneous value being worth obtained from measuring 3 times.It should be noted that the moisture permeability of optical film 10,15 is set It is set to the value measured in the state of by aftermentioned release film stripping.The lower limit of the moisture permeability of optical film 20 is more preferably 200g/ (m²More than for 24 hours), the upper limit is more preferably 500g/ (m²For 24 hours) below.

The transmissivity of the light of the wavelength 380nm of optical film 10,15 is preferably 7% or less.Pass through being somebody's turn to do optical film 10,15 The transmissivity of the light of wavelength region be set as 7% hereinafter, as a result, by optical film 10,15 for smart mobile phone, tablet terminal it In the case of the mobile terminal of class, polarizer can be inhibited to be exposed to ultraviolet light and deteriorate.Above-mentioned transmissivity is set as The arithmetic mean of instantaneous value being worth obtained from measuring 3 times.The upper limit of the transmissivity of the light of the wavelength 380nm of optical film is more preferably 5%. Light transmittance can use spectrophotometer (ProductName " UV-2450 ", Shimadzu Seisakusho Ltd. manufacture) to be measured.

The haze value (total mist degree value) of optical film 10,15 is preferably 1% or less.By by the haze value of optical film 10,15 It is set as 1% hereinafter, as a result, in the case where optical film 10,15 is used for mobile terminal, the albefaction of picture can be inhibited.Light The upper limit for learning the haze value of film 10,15 is more preferably 0.5% or less.Haze value can be found out as follows：According to JIS K7136： 2000, it is found out using haze meter (color technical research institute manufactures on ProductName " HM-150 ", village).Haze value is set as measuring The arithmetic mean of instantaneous value being worth obtained from 3 times.The light transmittance and haze value of optical film 10,15 are such as can be by adjusting sandwich layer In the additive amount of ultra-violet absorber etc. realize.

It is aftermentioned in order to be coated on surface 10A, 15A of optical film 10,15 (a face 11A of translucency functional layer 11) Hydrophilic translucency adhesive linkage composition, surface 10A, 15A of the optical film 10,15 after saponification process relative to water Contact angle is preferably 55 ° hereinafter, preferably 50 ° or less." saponification process " in this specification is by making optical film or laminate 2 equivalents, 55 DEG C of temperature sodium hydrate aqueous solution in impregnate 3 minutes and carry out.Contact angle can be measured as described below. For optical film, by after release film stripping after 24 hours, according to JIS R3257：1999 sessile drop method, use are micro- Mirror contact angle meter (ProductName " CA-QI series ", the manufacture of consonance surface chemistry Co., Ltd.) measures light transmission sexual function at 25 DEG C The contact angle relative to water on the surface of layer, is thus measured.Contact angle relative to water is set as obtained from measuring 3 times The arithmetic mean of instantaneous value of value.

<<Translucency functional layer>>

Translucency functional layer 11 is functioned as hard conating as described above, and therefore, translucency functional layer 12 is formed as JIS K5600-5-4：Layer with the hardness more than " H " in pencil hardness test specified in 1999 (4.9N load).Pass through Pencil hardness is set as " H " or more, optical film 10,15 is hardened, and can improve durability.It should be noted that from translucency The toughness of functional layer and from the perspective of preventing curling, the upper limit of the pencil hardness of the surface 11A of translucency functional layer 11 is excellent Choosing is set as 4H or so.

The face (is known as " surface of translucency functional layer " by one face 11A of translucency functional layer 11 below.) become light Learn surface 10A, 15A of film 10,15.See in 1 μm of square (1 1 μm of μ m) of the surface 11A of translucency functional layer 11 and 5 μm In the region of side's (5 5 μm of μ m), arithmetic average roughness (Ra) is respectively 0.5nm or more 1.5nm hereinafter, maximum height of the profile (Rz) it is respectively 4nm or more 20nm hereinafter, maximum crest height (Rp) is respectively 2nm or more 15nm or less.Ra, Rz and Rp's Definition is according to JIS B0601：2001.Ra, Rz, Rp are to use atomic force microscope (ProductName " WET-9100 ", Shimadzu Seisakusho Ltd. System) calculate as described below.Specifically, first, being selected at random in optical film and at least estimating not abnormal position at 3 (position of not big foreign matter or scratch etc.), cuts into 5mm square, obtains 3 samples.On the other hand, prepare multiple diameters The flat circular metal plate of 15mm and thickness 1mm, the carbon that the manufacture of Xin EM Co., Ltd. is pasted on each metallic plate are double Face adhesive tape.1 sample is pasted onto in such a way that the surface (surface of optical film) of sample is upside on above-mentioned adhesive tape.So Afterwards, in order to keep adhesive tape be bonded securely with sample, the metallic plate of carry sample is placed into a Dinner in drier.After placing a Dinner, The metallic plate of carry sample is fixed on atomic force microscope using magnet (ProductName " WET-9400 ", Shimadzu Seisakusho Ltd. manufacture) It measures on platform, with tapping-mode, is 1 μm of square and 5 μm of square in mensuration region, utilizes atomic force microscope observation surface shape Shape.Then, data according to the observation calculate Ra, Rz, Rp using face analysis software built-in in atomic force microscope.It needs Bright, longitudinal scale when face parses is set as 20nm.Observation carries out at room temperature, is manufactured using NanoWorld companies NCHR-20 is as cantilever.In addition, when observation, 1 sample is randomly chosen at 5, to (totally 15 points) minute at 3 sample × 5 Surface shape is not observed.Then, it for the total data of obtained 15 points, is solved using face built-in in atomic force microscope It analyses software and calculates Ra, Rz, Rp, the arithmetic mean of instantaneous value of 15 points is set as to Ra, Rz, Rp of each sample.

The reason that Ra of surface 11A of translucency functional layer 11 etc. is measured in the region of 1 μm of square is, sees with 5 μm Measurement in the region of side is compared, and analysis ability is can further improve；In addition, measuring translucency work(in the region of 5 μm of square The reason of the Ra of surface 11A of ergosphere 11 etc. is, can be in broader area compared with the measurement in the region of 1 μm of square Surface shape is observed in domain.

In addition, come the surface 11A of regulation translucency functional layer 11 being for following reasons using Ra, Rz, Rp.Ra be in order to It observes the average value of the height of peaks and troughs existing for the surface of translucency functional layer and uses, Rz is to observe The sum of the maximum value of the crest height on the surface of photosensitiveness functional layer and the maximum value of trough depth and use, Rp is to observe The maximum value of the crest height on the surface of translucency functional layer and use.Here, Ra observes the table in translucency functional layer The average value of the height of peaks and troughs existing for face, it is thus understood that the surface shape of rough translucency functional layer, but It is, it is possible to be averaged there are big wave crest or trough and have ignored its presence.In addition, Rp is to light transmission sexual function The maximum value of the crest height on the surface of layer is observed, therefore, using two parameters of Ra and Rp, it is possible to i.e. Make that there are big troughs can also ignore its presence, in addition, Rz is the maximum value to the crest height on the surface of translucency functional layer It is observed with the sum of the maximum value of trough depth, in the case of using two parameters of Ra and Rz, it is possible to wave can not be grasped Whether peak is high or whether trough is deep.Therefore, in order to more accurately judge whether the face shape for having uniform and flat, Ra is utilized One parameter, two parameters of Ra and Rp or two parameters of Ra and Rz are simultaneously insufficient, need tri- parameters of Ra, Rz and Rp.Cause This, in the present invention, using tri- parameters of Ra, Rz and Rp come the surface shape of regulation translucency functional layer.

If the Ra in 1 μm of square on the surface of translucency functional layer and the region of 5 μm of square is less than 0.5nm, have May due to excess smoothness and optical film is pasted each other when by optical film wound into rolls；In addition, if Ra is more than 1.5nm, it is likely that relative to water contact angle increase and because the bumps on surface cause haze value increase due to the transparency by Damage.Therefore, in the present invention, the Ra in the region of 1 μm of square on the surface of translucency functional layer and 5 μm of square is set separately For 0.5nm or more 1.5nm or less.

In 1 μm of square of the surface 11A of translucency functional layer 11 and the region of 5 μm of square, the lower limit difference of Ra is preferred For 1.0nm or more.

If the Rz in 1 μm of square on the surface of translucency functional layer and the region of 5 μm of square is less than 4nm, it is likely that Due to excess smoothness, optical film is pasted each other when by optical film wound into rolls；In addition, if Rz is more than 20nm, It is possible that the contact angle relative to water increases and the transparency is impaired due to haze value is caused to increase for the bumps on surface.Therefore, exist In the present invention, the Rz in the region of 1 μm of square on the surface of translucency functional layer and 5 μm of square is respectively set as 4nm or more 20nm or less.

In 1 μm of square of the surface 11A of translucency functional layer 11 and the region of 5 μm of square, the lower limit difference of Rz is preferred The upper limit for 5nm or more, Rz is respectively preferably 15nm or less.

If the Rp in 1 μm of square on the surface of translucency functional layer and the region of 5 μm of square is less than 2nm, it is likely that Due to excess smoothness, optical film is pasted each other when by optical film wound into rolls；In addition, when Rp is more than 15nm, then have It may increase relative to the contact angle of water and the transparency is impaired due to haze value is caused to increase for the bumps on surface.Therefore, at this In invention, the Rp in the region of 1 μm of square on the surface of translucency functional layer and 5 μm of square is respectively set as 2.0nm or more 15nm or less.

In 1 μm of square of the surface 11A of translucency functional layer 11 and the region of 5 μm of square, the lower limit difference of Rp is preferred The upper limit for 3nm or more, Rp is respectively preferably 10nm or less.

The film thickness of translucency functional layer 11 is preferably 2.0 μm or more 15 μm or less.If the film thickness of translucency functional layer 11 For the range, then desired hardness can be obtained, and residual solvent can be reduced, the reduction of adaptation can be inhibited.Light transmission The film thickness of sexual function layer can observe the section of translucency functional layer to find out by using scanning electron microscope (SEM). Specifically, using the image of scanning electron microscope, the film thickness of translucency functional layer at 3 is measured in one image, to 5 A image carries out above-mentioned measurement, calculates the average value of measured film thickness.

From the viewpoint of the rupture for inhibiting translucency functional layer, the lower limit of the film thickness of translucency functional layer 11 is preferably 12 μm or less.In addition, from the viewpoint of the filming for realizing translucency functional layer and inhibiting the generation crimped, light transmission sexual function The film thickness of layer 11 is more preferably 3 μm or more 10 μm or less.

The refractive index of translucency functional layer 11 can be 1.50 or more 1.60 or less.The refractive index of translucency functional layer 11 Lower limit can be 1.52 or more, and the upper limit of the refractive index of translucency functional layer 11 can be 1.56 or less.

The refractive index of translucency functional layer 11 can utilize Abbe refractomecer (ProductName " NAR-4T ", Atago corporations Make), ellipsometer measures.Furthermore it is possible to cut translucency functional layer 11 using cutter etc., the sample of powdery state is made, is led to It crosses according to JIS K7142：Bake (Becke) method of the 2008 B methods (the transparent material use of powder or granular) recorded (uses refraction The sample of above-mentioned powdery state is placed on glass slide etc. by Cargille reagents known to rate, and reagent is added dropwise on the sample, is utilized Reagent-impregnated sample.Its situation is observed using micro- sem observation, range estimation can not be observed because of the refractive index of sample and reagent not The method of same and refractive index in the refractive index of the reagent of the bright line (Becke line) of the profile of sample generation as sample) it finds out The refractive index of photosensitiveness functional layer 11.

Translucency functional layer 11 at least can be by including the ionizing ray polymerizable compound as curable resin precursor Solidfied material (polymer) resin constitute.It should be noted that can also contain in addition to the resins in translucency functional layer 11 There are inorganic particle and levelling agent.In the case that translucency functional layer 11 contains inorganic particle, resin is played as binder resin Function.

<Resin>

As resin contained in translucency functional layer 11, as long as by the surface of translucency functional layer when release film stripping 1 μm of square and 5 μm of square region in Ra, Rz, Rp be respectively that the resin of above range is just not particularly limited.

As described above, resin contains the solidfied material of ionizing ray polymerizable compound.In addition to ionizing ray polymerize in resin Property compound solidfied material other than can also contain solvent-dry type resin.

Ionizing ray polymerizable compound has at least one ionizing ray polymerizable functional group.In the present specification, " electricity From ray polymerization functional group " it is the functional group that polymerisation can occur by ionizing radiation exposure.It polymerize as ionizing ray Property functional group, such as can enumerate：The ethylenically unsaturated groups such as (methyl) acryloyl group, vinyl, allyl.It needs to illustrate , " (methyl) acryloyl group " in this specification refer to include both " acryloyl group " and " methylacryloyl ".In addition, As the ionizing ray being irradiated when ionizing ray polymerizable compound being made to polymerize, can enumerate：Luminous ray, ultraviolet light, X Ray, electron ray, alpha ray, β rays and gamma-rays.

As ionizing ray polymerizable compound, can enumerate：Ionizing ray polymerizable monomer, ionizing ray polymerism are low Polymers or ionizing ray polymerizing prepolymer can be adjusted suitably and use these substances.As ionizing ray polymerizable compound, It is preferred that the combination of ionizing ray polymerizable monomer and ionizing ray polyreactive oligomers or ionizing ray polymerizing prepolymer.

(ionizing ray polymerizable monomer)

As ionizing ray polymerizable monomer, it is however preferred to have the ionizing ray polymerism more than two (that is, two functions) The polyfunctional monomer of functional group.

As ionizing ray polymerizable monomer, can enumerate that alkylene oxide is modified, urethane-modified, epoxy-modified Or the ionizing ray polymerizable monomer for having imported modified base such as alkoxy-modified.Wherein, good from the fissility of release film from obtaining From the perspective of getting well and having adhesivity and the optical film of high mechanical strength, preferably alkylene oxide is modified (methyl) acrylic acid Ester.As alkylene oxide, epoxy methane, ethylene oxide, propylene oxide, epoxy butane etc. can be enumerated.

Wherein, from the viewpoint of obtaining good fissility and marresistance, more preferably ethylene-oxide-modified (EO changes Property) acrylate, epoxy pronane modification (PO modifications) acrylate.In addition, wherein good from the balance of fissility and marresistance It sets out well, particularly preferred PO modification acrylates.

(ionizing ray polyreactive oligomers)

As ionizing ray polyreactive oligomers, can enumerate：Carbamate (methyl) acrylate, polyester (methyl) Acrylate, epoxy (methyl) acrylate, melamine (methyl) acrylate, poly- fluoro-alkyl (methyl) acrylate, Oligomer such as siloxanes (methyl) acrylate etc..

(ionizing ray polymerizing prepolymer)

As the weight average molecular weight of ionizing ray polymerizing prepolymer, preferably 10000 or more 80000 hereinafter, more preferably It is 10000 or more 40000 or less.In the case that weight average molecular weight is more than 80000, it is possible to which viscosity is high, therefore is coated under adaptive Drop, the degraded appearance of obtained optical film.As photopolymerizing prepolymers, can enumerate：Carbamate (methyl) propylene Acid esters, polyester (methyl) acrylate, epoxy (methyl) acrylate, melamine (methyl) acrylate, poly- fluoro-alkyl Prepolymers such as (methyl) acrylate, siloxanes (methyl) acrylate etc..In the present specification, " weight average molecular weight " is dissolving It is converted in tetrahydrofuran (THF) equal solvent by being based on the polystyrene of conventionally known gel permeation chromatography (GPC) method The value arrived.

Wherein, from the viewpoint of improve with the interlayer adaptation of sandwich layer, preferred urethane acrylate prepolymer.

Ionizing ray polymerizable monomer is ionizing ray polymerism with preferred combine of ionizing ray polymerizing prepolymer Monomer is EO modification acrylates and ionizing ray polymerizing prepolymer is urethane acrylate prepolymer.

Ionizing ray polymerizable monomer is with ionizing ray polymerizing prepolymer preferably with 90：10~70：30 contain.By Contain ionizing ray polymerizable monomer and ionizing ray polymerizing prepolymer within the scope of this, it can be the case where so that hardness is reduced Lower raising flexibility and toughness.

Inorganic particle be mechanical strength for improving translucency functional layer 11, pencil strength ingredient, as inorganic particulate Grain, such as can enumerate：Silica (SiO₂) particle, alumina particle, titanium dioxide granule, granules of stannic oxide, Sb doped Tin oxide (referred to as：ATO) the inorganic oxide particles such as particle, Zinc oxide particles.Wherein, from the viewpoint for further increasing hardness It sets out, preferably silica dioxide granule, in silica dioxide granule, more preferably special-shaped silica dioxide granule.Use preparing spherical SiO 2 In the case of particle, the hardness of the smaller then translucency functional layer of grain size of spherical silica particle is higher.In contrast, for For special-shaped silica dioxide granule, can be realized not being the spherical silica particle of as low as commercially available minimum grain size with The same hardness of the preparing spherical SiO 2.

The average primary particle diameter of special-shaped silica dioxide granule is preferably 1nm or more 100nm or less.Special-shaped silica dioxide granule Average primary particle diameter to be the range can also realize that with average primary particle diameter be 1nm or more 45nm preparing spherical SiO 2s below Same hardness.The average grain diameter of special-shaped silica dioxide granule is as described below：In utilization transmission electron microscope (TEM) with 20 In picture obtained by the section of ten thousand times of shooting function layers, the special-shaped silica dioxide granule of random extraction 10, after calculating each grain size, Using its average value as average grain diameter.It is each abnormity silica dioxide granule grain size be set as in the section of particle longest diameter with The average value of most short diameter.

The content of inorganic particle in translucency functional layer 11 is preferably 20 mass % or more, 70 mass % or less.If nothing The content of machine particle is less than 20 mass %, then is difficult to ensure sufficient hardness；In addition, if the content of inorganic particle is more than 70 matter % is measured, then filling rate excessively improves, and the adaptation of inorganic particle and resin component is deteriorated, and makes the hard of translucency functional layer instead Degree reduces.

As inorganic particle, it is preferable to use there is the inorganic particle (reactive inorganic of optical polymerism functional group on surface Grain).It is such to have the inorganic particle of optical polymerism functional group be by using silane coupling agent etc. to inorganic particulate on surface Grain is surface-treated to make to obtain.It, can as the method handled the surface of inorganic particle using silane coupling agent To enumerate：The dry process of silane coupling agent is sprayed to the inorganic particle, inorganic particle dispersion is made to add silane idol afterwards in a solvent The damp process etc. that connection agent is reacted.

Levelling agent is generated due to preventing the surface tension because of translucency functional layer from becoming uneven, is shunk, recess, needle The defects of hole, orange peel shape defect (ユズ Ha ダ) and the additive for keeping surface smoothened.Levelling agent is not particularly limited, can be with It enumerates：With polyether-based, polyurethane, epoxy group, carboxyl, acrylate-based, methacrylate, methanol-based or hydroxyl Compound etc..Above-mentioned levelling agent can the end (single end, two ends) of main chain have polyether-based, polyurethane, epoxy group, Carboxyl, acrylate-based, methacrylate, methanol-based or hydroxyl can also have above-mentioned group in side chain, can also be The end of main chain and side chain have above-mentioned group.As levelling agent, as long as with polyether-based, polyurethane, epoxy group, carboxylic Base, acrylate-based, methacrylate, the compound of methanol-based or hydroxyl are just not particularly limited, such as can enumerate： The levelling agent of siloxane-based, fluorine system, siloxanes/fluorine mixed stocker, acrylic compounds, methacrylic, aromatic system.

Levelling agent containing silicon atom is due to being possible to recoatability variation and the coating defects increasing such as contraction when additive amount is more It is more, therefore, as levelling agent, preferably fluorine system levelling agent.As commercially available fluorine system levelling agent, such as can enumerate：F-568、F- 556, F-554, F-553 (being the manufacture of DIC companies) etc..

(the composition is known as below relative to the aftermentioned solidification compound for being used to form translucency functional layer 11 " translucency functional layer composition ") in 100 mass parts of ionizing ray polymerizable compound, the content of levelling agent is preferably It is more than 0.01 mass parts that 5 is below mass part.By the way that the content of levelling agent to be set as within the scope of this, it is more excellent flatness can be obtained The surface 11A of good translucency functional layer 11.

<<Sandwich layer>>

The face (is known as " back of the body of translucency functional layer by 12 lamination of sandwich layer below in the another side 11B of translucency functional layer 11 Face ".) side.Sandwich layer 12 is that the layer instead of base material especially more preferably contains specifically, it is preferable that containing the resin comprising solidfied material There is the resin of the solidfied material comprising ionizing ray polymerizable compound.It is preferable to use the resin conducts comprising solidfied material to form sandwich layer The case where the reason of 12 resin, is, replaces the resin to form sandwich layer using the solvent-dry type resin of thermoplastic resin etc Under, sandwich layer becomes excessively soft, and the pencil hardness of optical film reduces.

Sandwich layer 12 can be only to include the layer of above-mentioned resin, but can also contain additive to play desired function. As additive, be not particularly limited, the most outdoor application of mobile device, polarizer be exposed to ultraviolet light be easy to happen it is bad Change, it is therefore preferable that absorbing ultraviolet light and inhibiting the ultra-violet absorber (UVA) of the deterioration because of UV-induced polarizer. In addition, in order to improve dimensional stability, fracture strength, sandwich layer 12 can contain the inorganic particles such as silica dioxide granule, talcum or Organic series fiber etc. is used as additive.As organic series fiber, can be properly used cellulose nano-fibrous.Sandwich layer 12 contains purple In the case of the additives such as ultraviolet absorbers, resin is functioned as binder resin.

The film thickness of sandwich layer 12 is preferably 5 μm or more 40 μm or less.It, can by the way that the film thickness of sandwich layer 12 is set as the range Inhibit the significant decrease of the intensity of sandwich layer 12, and can easily be done the painting for the sandwich layer composition for being used to form sandwich layer 12 Cloth, in addition, not will produce the deterioration of the processability (especially chipping resistance) caused by the thickness of sandwich layer 12 is blocked up.Sandwich layer Film thickness can observe the section of sandwich layer to find out using scanning electron microscope (SEM).Specifically, using scanning electron Microscope measures the film thickness of sandwich layer 12 at 3 in one image, carries out above-mentioned measurement to 5 images, calculates measured film thickness Average value.

The upper limit of the film thickness of sandwich layer 12 be more preferably 30 μm hereinafter, further preferably 20 μm hereinafter, most preferably 10 μm Below.

<Resin>

As described above, resin contained in sandwich layer 12 is the resin comprising solidfied material, in such resin, electricity is preferably comprised Solidfied material (polymer) from ray polymerization compound.Obtain the sandwich layer with the flexibility of excellent toughness and appropriateness In the case of, as ionizing ray polymerizable compound, such as it is preferable to use ionizing ray polyreactive oligomers, ionizing rays to polymerize Property prepolymer.As ionizing ray polyreactive oligomers or ionizing ray polymerizing prepolymer, can enumerate：Carbamate (methyl) acrylate, polyester (methyl) acrylate, epoxy (methyl) acrylate, melamine (methyl) acrylate, The oligomer or prepolymer of poly- fluoro-alkyl (methyl) acrylate, siloxanes (methyl) acrylate etc..These ionizing rays Polyreactive oligomers or ionizing ray polymerizing prepolymer can be used a kind of or be applied in combination two or more.

The weight average molecular weight of ionizing ray polyreactive oligomers or ionizing ray polymerizing prepolymer is preferably 1000 or more 20000 or less.The lower limit of the weight average molecular weight of ionizing ray polyreactive oligomers or ionizing ray polymerizing prepolymer is more preferable It is 3000 or more, the upper limit is more preferably 12000 hereinafter, further preferably 10000 or less.

It, can be by ionizing ray polyreactive oligomers or ionizing ray in order to adjust the viscosity etc. of hardness, composition The solidfied material of mixture on the basis of polymerizing prepolymer further containing simple function ionizing ray polymerizable monomer forms core The resin of layer 21.Simple function ionizing ray polymerizable monomer is the change with 1 ionizing ray polymerizable functional group in the molecule Close object.As simple function ionizing ray polymerizable monomer, such as can enumerate：Hydroxyethyl Acrylate (HEA), methacrylic acid Ethylene oxidic ester, methoxy poly (ethylene glycol) (methyl) acrylate, (methyl) acrylic acid iso stearyl ester, 2- acryloxy second Base succinate etc..

<Ultra-violet absorber>

Ultra-violet absorber has the function of absorbing ultraviolet light.As ultra-violet absorber, it is not particularly limited, for example, As ultra-violet absorber, such as can enumerate：Triazine system ultra-violet absorber, benzophenone series ultra-violet absorber and benzene And triazole system ultra-violet absorber etc..

As above-mentioned triazine system ultra-violet absorber, such as can enumerate：2- (2- hydroxyls -4- [1- octyl Epoxide carbonyl second Oxygroup] phenyl) bis- (4- the phenyls) -1,3,5- triazines of -4,6-, 2- [4- [(2- hydroxyl -3- dodecyl oxygroups propyl) oxygen Base] -2- hydroxy phenyls] bis- (2,4- the 3,5-dimethylphenyls) -1,3,5- triazines of -4,6-, the bis- [2- hydroxyl -4- butyl phenyl ethers of 2,4- Base] -6- (2,4- dibutoxies phenyl) -1,3,5- triazines, 2- [4- [(2- hydroxyl -3- tridecyl oxygroups propyl) oxygroup] -2- Hydroxy phenyl] bis- (2,4- the 3,5-dimethylphenyls) -1,3,5- triazines of -4,6- and 2- [4- [(2- hydroxyls -3- (2 '-ethyl) hexyl) Oxygroup] -2- hydroxy phenyls] bis- (2,4- the 3,5-dimethylphenyls) -1,3,5- triazines of -4,6- etc..

In addition, as commercially available triazine system ultra-violet absorber, such as can enumerate：TINUVIN460(BASF JAPAN Company manufactures), LA-46 (manufacture of ADEKA companies) etc..

As above-mentioned benzophenone series ultra-violet absorber, such as can enumerate：2- dihydroxy benaophenonels, 2,4- dihydroxy Benzophenone, 2,2 '-dihydroxy -4,4 '-dimethoxy-benzophenone, 2,2 ', 4,4 '-tetrahydroxybenzophenones, 2- hydroxyls -4- Methoxy benzophenone, group oxybenzone sulfonic acid and its trihydrate, group oxybenzone sodium sulfonate etc.. In addition, as commercially available benzophenone series ultra-violet absorber, such as can enumerate：CHMASSORB81/FL (BASF AG's systems Make) etc..

As above-mentioned enumerate BTA system ultra-violet absorber, such as can enumerate：2- ethylhexyls -3- [3- tertiary butyls -4- Hydroxyl -5- (the chloro- 2H- benzotriazole -2- bases of 5-) phenyl] propionic ester, 2- (2H- benzotriazole -2- bases) -6- (straight chain and side chain Dodecyl) -4- methylphenols, 2- [5- chlorine (2H)-benzotriazole -2- bases] -4- methyl -6- (tertiary butyl) phenol, 2- (2H- Benzotriazole -2- bases) -4,6- di-tert-pentyl phenols, 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole, 2- (2 '-hydroxyls - 3 ', 5 '-di-tert-butyl-phenyls) benzotriazole, 2- (2 '-hydroxyls -3 '-tertiary butyl -5 '-aminomethyl phenyl) benzotriazole, 2- (2 ' - Hydroxyl -3 ', 5 '-di-tert-butyl-phenyls) -5- chlorobenzotriazoles, 2- (2 '-hydroxyls -3 '-(3 ", 4 ", 5 ", 6 "-tetrahydrochysene O-phthalics Acid imide methyl) -5 '-aminomethyl phenyls) benzotriazole, 2,2- di-2-ethylhexylphosphine oxides (4- (1,1,3,3- tetramethyl butyls) -6- (2H- benzene And triazole-yl) phenol) and 2- (2 '-hydroxyls -3 '-tertiary butyl -5 '-aminomethyl phenyl) -5- chlorobenzotriazoles etc..

In addition, as commercially available enumerate BTA system ultra-violet absorber, such as can enumerate：KEMISORB71D、 KEMISORB79 (be Chemipro chemical conversion company manufacture), JF-80, JAST-500 (being the manufacture of north of the city chemical company), ULS-1933D (side company manufacture), RUVA-93 (manufacture of great Mound chemical companies) etc..

About above-mentioned ultra-violet absorber, wherein it is preferable to use triazine system ultra-violet absorbers, specifically, from ultraviolet Line absorption, the dissolubility in the above-mentioned ionizing ray polymerizable monomer or ionizing ray polyreactive oligomers for constituting sandwich layer 12 Etc. viewpoints set out, particularly preferably use TINUVIN400.

It as the content of above-mentioned ultra-violet absorber, is not particularly limited, 100 matter of resin solid content relative to sandwich layer Part is measured, more than preferably 1 mass parts 6 is below mass part.If the content of the ultra-violet absorber in sandwich layer is set as the model It in enclosing, then can make fully to contain ultra-violet absorber in sandwich layer, and can inhibit to generate significant coloring, intensity in sandwich layer It reduces.The preferred lower limit of the content of ultra-violet absorber is 2 mass parts or more, and the preferred upper limit is 5 below mass part.

Sandwich layer 12 can contain such as lubricant, plasticizer, filler, filler, antistatic agent, resist blocking and that as needed Other ingredients such as the colorants such as agent, crosslinking agent, light stabilizer, dyestuff, pigment.

<<Cementability improves layer>>

It is for improving and the layer of the cementability of bonding agent that cementability, which improves layer 13,.In the present specification, " cementability improves Layer " refers to the layer that peel strength is 1N or more when measuring the peel strength at the interface between bonding agent by following methods.Specifically For, first, the optical film of no base material it is unassembled in polarizing film in the case of, via polyethenol series bonding agent (by poly- second Enol resin (ProductName " PVA-117 ", the manufacture of KURARAY companies) is diluted to poly- second obtained by solid constituent 5% using pure water Enol aqueous solution), the optical film without base material after saponification process is pasted on a face of polarizer, and in polarizer Another side on paste triacetyl cellulose base material, the optical film of no base material is assembled in polarizing film.Then, using the polarization Piece, by temple ridge make manufactured double faced adhesive tape " 751B " by polarizing film from glass plate in the way of outstanding by the nothing in polarizing film The surface mount of the optical film side of base material is in glass plate.Then, it is caught from glass plate polarizing film outstanding, with 180 using collet The speed of the angle and 375mm/ of degree minute carries out tension test, at this time bonding agent and the optical film of no base material with it is bonding The peel strength at the interface of the layer of agent contact is measured.It should be noted that will make path increment (tensile elongation) 100mm~ Intensity after being equalized between 200mm is set as peel strength.On the other hand, the optical film of no base material is assembled in the feelings of polarizing film Under condition, using the polarizing film, manufactured double faced adhesive tape " 751B " is made with polarizing film from glass plate side outstanding using temple ridge Formula is by the surface mount of the optical film side without base material in polarizing film in glass plate.Then, by as described above the step of, survey Determine peel strength.In the case that the layer contacted with bonding agent in the optical film of no base material is sandwich layer, the boundary of bonding agent and sandwich layer The peel strength in face is 100mN hereinafter, therefore, there is layer contact with bonding agent on sandwich layer and bonding agent and this layer In the case that peel strength is 1N or more, it can judge through this layer so that the cementability with bonding agent improves, it may be said that should Layer is that cementability improves layer.

Cementability improves layer 13 and is not particularly limited as long as it can improve with the layer of the cementability of bonding agent, for example, In the case where sandwich layer 12 contains ultra-violet absorber, it is possible to (exudation) ultra-violet absorber is precipitated on the surface of sandwich layer 21, The haze value of protective film increases, and therefore, cementability improves layer 22 and can also be played other than playing the function of improving cementability Inhibit the function of the precipitation of ultra-violet absorber.

Cementability improves layer 13 and is not particularly limited as long as it can improve with the layer of the cementability of bonding agent, is being bonded Property improve the surface 13A of layer 13 and be coated with aftermentioned water system bonding agent etc., therefore, the cementability after saponification process improves the table of layer 13 The contact angle relative to water of face 13A is preferably 80 ° or less.Cementability after saponification process improves the phase of the surface 13A of layer 13 It can be according to JIS R3257 for the contact angle of water：1999 sessile drop methods recorded utilize microscope type contact angle meter (ProductName " CA-QI series ", consonance surface chemistry Co., Ltd. manufacture) it is measured.Cementability after saponification process improves the table of layer 13 The contact angle relative to water of face 13A is more preferably 70 ° or less.

The film thickness that cementability improves layer 13 is preferably 100nm or more, is less than 800nm.If cementability improves the film of layer 13 Thickness is less than 100nm, it is likely that is not improved with the cementability of bonding agent；In addition, if the film thickness that cementability improves layer 13 is 800nm or more, it is likely that cure shrinkage increases and the adaptation of sandwich layer is deteriorated.The film thickness that cementability improves layer 13 can lead to Assay method same as the assay method of the film thickness of above-mentioned sandwich layer 12 is crossed to be measured.Cementability improves under the film thickness of layer 13 Limit is more preferably 150nm or more.The upper limit that cementability improves the film thickness of layer 13 is more preferably 600nm hereinafter, most preferably 500nm Below.

From the viewpoint of improving the cementability with bonding agent, cementability improves layer 13 and preferably comprises to be gathered comprising ionizing ray The resin and silane coupling agent of the solidfied material (polymer) of conjunction property compound.

<Resin>

The resin that cementability improves layer is the resin of the solidfied material comprising ionizing ray polymerizable compound.It is penetrated as ionization Line polymerizable compound, as long as the compound in the molecule with 1 or more ionizing ray polymerizable functional group, preferably For the multifunctional ionizing ray polymerizable compound in the molecule with 2 or more ionizing ray polymerizable functional groups.By making With multifunctional ionizing ray polymerizable compound, layer 13 can be improved to cementability and assign hardness.In addition, if adding in the core Add ultra-violet absorber, is then transferred to the table that cementability improves layer, improves layer in cementability from sandwich layer with ultra-violet absorber The tendency that face is precipitated, by using multifunctional ionizing ray polymerizable compound, bonding in improving layer composition in cementability Property improve layer in crosslink density improve, therefore, it is possible to inhibit the precipitation of ultra-violet absorber.Multifunctional ionizing ray polymerism Compound preferably has 2 or more ionizing ray polymerizable functional groups in the molecule, more preferably has 3 or more.

The ionizing ray polymerizable compound in layer composition is improved as cementability, is not particularly limited, Ke Yilie It lifts：Ester compounds, hetero ring type (methyl) acrylate, carbamate (methyl) acrylic acid of polyalcohol and (methyl) acrylic acid Ester, polyester (methyl) acrylate, epoxy (methyl) acrylate and their mixture etc..

Silane coupling agent is the organo-silicon compound for having reactive functional groups and hydrolization group.Reactive functional groups are The group that can be reacted with multifunctional ionizing ray polymerizable compound etc. can enumerate choosing as reactive functional groups Free ethylene base, epoxy group, styryl, (methyl) acryloyl group, amino, urea groups, sulfydryl, thioether group and isocyanate group One or more of group of composition functional group.Wherein, from the viewpoint of with the adaptation of sandwich layer 12, preferred (methyl) acryloyl Base.

Hydrolization group is can to generate the group of silanol (Si-OH) and alcohol by hydrolysis, as water-disintegrable base, Such as it can enumerate：Halogen atom, alkoxy, acyloxy, alkenyloxy group, carbamoyl, amino, amino oxygroup, ketoxime base etc.. In the case that hydrolization group has carbon atom, preferably its carbon atom number is 6 hereinafter, more preferably 4 or less.Particularly preferably carbon Atomicity is 4 alkoxies below or alkenyloxy group, particularly preferably methoxy or ethoxy.

As the concrete example of silane coupling agent, such as can enumerate：3- methacryloyloxypropyl methyl dimethoxys Silane, 3- methacryloxypropyl trimethoxy silanes, 3- methacryloxypropyl methyl diethoxysilanes, 3- Methacryloxypropyl, 3- acryloxypropyl triethoxysilanes etc..

The composition (is known as " cementability by the solidification compound for being formed relative to cementability raising layer 13 below Improve layer composition ") in 100 mass parts of resin solid content, the content of silane coupling agent is preferably 10 mass parts or more 50 is below mass part.By the way that the content of silane coupling agent to be set as within the scope of this, can make better with the cementability of bonding agent It is good.

<<<The manufacturing method of optical film>>>

Optical film 10,15 can for example make as described below.First, prepare the release film 21 as shown in Fig. 2 (A) etc..

<<Release film>>

Release film 21 is removed from the surface 11A of translucency functional layer 11, as a result, transfers a face 21A of release film 21 To the surface 11A of translucency functional layer 11.Therefore, a face 21A of release film 21 is preferably in the area of 1 μm of square and 5 μm of square It is respectively 4nm or more that domain arithmetic internal mean roughness (Ra), which is respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz), 20nm or less, maximum trough depth (Rv) are respectively 2nm or more 15nm or less.The definition of Ra, Rz and Rv are according to JIS B0601：2001.Ra, Rz, Rv be using atomic force microscope (ProductName " WET-9100 ", Shimadzu Seisakusho Ltd. manufacture) with it is saturating Same Step By Condition of Ra, Rz, Rp illustrated in the column of photosensitiveness functional layer etc. is lower to be calculated.

Release film 21 can be translucency, and when optical film 10,15 is assembled in display panel, release film 21 is stripped, because This, can not also be translucency.As release film 21, as long as when release film 21 is removed translucency functional layer 11 surface Ra, Rz, Rp in the region of 1 μm of square and 5 μm of square in 11A are respectively that the film of above range is just not particularly limited, example As, it is preferable to use at least single side is untreated polyethylene terephthalate (PET) film.In this case, gather to benzene two The face of the untreated side of formic acid glycol ester film is used as release surface.At least single side is untreated polyethylene terephthalate Ester film is not only excellent with the release performance of translucency functional layer, but also due to cheap, can be by the lamination of present embodiment The manufacturing cost of body inhibits relatively low.For example, if being made using the release film for being coated with Si systems mould release containing silicon atom etc. For above-mentioned release film, then the fissility of the release film is good, another aspect, sometimes mould release when the transfer of translucency functional layer Ingredient is transferred to translucency functional layer side, and the concave-convex of the surface of translucency functional layer increases, and the surface of translucency functional layer Relative to water contact angle increase.In contrast, if the use of at least single side being untreated polyethylene terephthalate Ester film is then not transferred to the ingredient of translucency functional layer 11 as release film 21 in the transfer of translucency functional layer 11, because This, the bumps on the surface of translucency functional layer are small, and are difficult to generate at the surface 11A of the translucency functional layer 11 after transfer The variation of the contact angle of water.In the present specification, " at least single side is untreated polyethylene terephthalate film " refers to Polyethylene terephthalate film with the face not being surface-treated.Therefore, in single side it is at least untreated poly- pair There is no the mould releases for improving fissility on the face of the untreated side of ethylene terephthalate film.

The thickness of release film 21 is not particularly limited, and is preferably set to 25 μm or more 100 μm or less.If the thickness of release film Degree is less than 25 μm, then the influence of the cure shrinkage of translucency functional layer can be notable when so that translucency functional layer is cured using ultraviolet light It shows, serious fold is easy tod produce in release film；In addition, if the thickness of release film is more than 100 μm, manufacturing cost It increases.

After preparing release film 21, as shown in Fig. 3 (A), translucency functional layer use is coated on a face 21A of release film 21 Composition makes it dry, to form the film 22 of translucency functional layer composition.

Translucency functional layer composition contains ionizing ray polymerizable compound, but in addition to this can also be as needed Add above-mentioned inorganic particle, above-mentioned levelling agent, solvent, polymerization initiator.In addition, according to improve translucency functional layer hardness, The purpose of inhibiting cure shrinkage or inhibiting refractive index, can add conventionally known in translucency functional layer composition Dispersant, surfactant, silane coupling agent, thickener, stainblocker, colorant (pigment, dyestuff), antifoaming agent, fire retardant, Ultra-violet absorber, adhesion promoters, polymerization inhibitor, antioxidant, surface modifier, anticlogging agent etc..

As solvent, such as can enumerate：Alcohols (methanol, ethyl alcohol, propyl alcohol, isopropanol, n-butanol, sec-butyl alcohol, tertiary fourth Alcohol, benzylalcohol, PGME, ethylene glycol etc.), ketone (acetone, methyl ethyl ketone (MEK), cyclohexanone, methyl iso-butyl ketone (MIBK), two acetone Alcohol, cycloheptanone, metacetone etc.), ethers (1,4- dioxanes, dioxolanes, diisopropyl ether dioxane, tetrahydrofuran etc.), fat Fat race hydro carbons (hexane etc.), ester ring type hydro carbons (hexamethylene etc.), aromatic hydrocarbon (toluene, dimethylbenzene etc.), halogenated hydrocarbons (dichloromethane Alkane, dichloroethanes etc.), esters (methyl formate, methyl acetate, ethyl acetate, propyl acetate, butyl acetate, ethyl lactate etc.), Dioxane (methyl cellosolve, ethyl cellosolve, butyl cellosolve etc.), cellosolve acetate class, sulfoxide type (dimethyl sulfoxide (DMSO) Deng), amides (dimethylformamide, dimethylacetylamide etc.) or their mixture.

Polymerization initiator is to generate free radicals to make ionizing ray polymerizable compound by light or heat are decomposed Polymerization (crosslinking) start or carry out ingredient.Polymerization initiator used in translucency functional layer composition can be enumerated Photoepolymerizationinitiater initiater (such as optical free radical polymerization initiator, light cationic polymerization initiator, time cation polymerization initiator).

As above-mentioned optical free radical polymerization initiator, such as can enumerate：Benzophenone based compound, acetophenone system chemical combination Object, acylphosphine oxide compound, titanocenes based compound, oxime ester based compound, benzoin ether based compound, thioxanthones etc..

As commercially available product in above-mentioned optical free radical polymerization initiator, such as can enumerate：IRGACURE184、 IRGACURE369、IRGACURE379、IRGACURE651、IRGACURE819、IRGACURE907、IRGACURE2959、 IRGACURE OXE01, Lucirin TPO (being BASF JAPAN corporations), NCI-930 (manufacture of ADEKA companies), SPEEDCURE EMK (Japanese Siebel Hegner corporations), benzoin methylether, benzoin ethyl ether, benzoin iso-propylether are ( For Tokyo chemical conversion industry corporation) etc..

As above-mentioned light cationic polymerization initiator, such as can enumerate：Aromatic diazonium salt, aromatic iodonium salts, Aromatic series sulfonium salt etc..As commercially available product in above-mentioned light cationic polymerization initiator, such as can enumerate：ADEKA OPTMER SP-150, ADEKA OPTMER SP-170 (being ADEKA corporations) etc..

Relative to 100 mass parts of ionizing ray polymerizable compound, the polymerization in translucency functional layer composition causes The content of agent is preferably that 0.5 mass parts or more 10.0 are below mass part.By the way that the content of polymerization initiator is set as the range It is interior, it can fully ensure hard painting propert energy, and solidification can be inhibited to hinder.

As the method for coating translucency functional layer composition, can enumerate：Spin coating, dip coating, spray coating method, slope flow coat Coating method well known to cloth method, stick coating method, rolling method, gravure coating process, die coating method etc..

Then, ultraviolet light ionizing ray is irradiated to make ionizing ray polymerism chemical combination to film 22 as shown in Fig. 3 (B) Object polymerize (crosslinking), as a result, cures film 22, forms translucency functional layer 11.Here, when solidification, blown if carrying out nitrogen It sweeps, then translucency functional layer over-curing, it is therefore preferable that making translucency functional layer solid in the case where being purged without nitrogen Change.

As ionizing ray when translucency functional layer composition being made to cure, in the case of using ultraviolet light, Ke Yili With the ultraviolet light etc. sent out by ultrahigh pressure mercury lamp, high-pressure sodium lamp, low pressure mercury lamp, carbon arc lamp, xenon arc lamp, metal halide lamp etc.. In addition, the wavelength as ultraviolet light, can use the wavelength region of 190~380nm.It, can as the concrete example of electronic radial source To enumerate：Cockcroft-Wall (Cockcroft Walt) type, Fan get Ge loudspeakers husband (Bandgraph) type, resonance transformer Type, insulating core transformer typ or linear type, the various electron ray accelerators such as that meter of type, high-frequency type.

After forming translucency functional layer 11 on release film 21, as shown in Fig. 3 (C) translucency functional layer 11 with it is release It is coated with sandwich layer composition on the face of the face opposite side of 21 side of film, makes it dry, to form the film of sandwich layer composition 23.As described above, sandwich layer composition contains ionizing ray polymerizable compound, but can also contain as needed in addition to this Above-mentioned ultra-violet absorber, above-mentioned levelling agent, solvent, polymerization initiator.Solvent contained in sandwich layer composition, polymerization cause Agent is same as solvent, the polymerization initiator described in the column of translucency functional layer composition, therefore, in this description will be omitted.

Then, as shown in Fig. 4 (A), the ionizing rays such as ultraviolet light is irradiated to film 23, make ionizing ray polymerizable compound It polymerize (crosslinking), thus cures film 23, to form sandwich layer 12.

After forming sandwich layer 12 in translucency functional layer 11, by release film 21 from translucency functional layer 11 as shown in Fig. 4 (B) Stripping.The surface shape of release film 21 is transferred to the surface 11A of translucency functional layer 11 as a result, can obtain as shown in Figure 1 Optical film 10.

In the case of obtaining optical film 15 as shown in Figure 2, after forming sandwich layer 12 in translucency functional layer 11, such as Fig. 5 (A) cementability is coated on the face with the face opposite side of 11 side of translucency functional layer of sandwich layer 12 improve layer composition shown in And make it dry, to form the film 24 that cementability improves layer composition.As described above, cementability improves layer composition Containing ionizing ray polymerizable compound and silane coupling agent, solvent can also be contained as needed in addition to this, polymerization is drawn Send out agent.Cementability improves in the column of solvent, polymerization initiator and translucency functional layer composition contained in layer composition Solvent, the polymerization initiator of record are same, therefore, in this description will be omitted.

Then, as shown in Fig. 5 (B), the ionizing rays such as ultraviolet light is irradiated to film 24, make ionizing ray polymerizable compound Polymerization (crosslinking) thus cures film 24, forms cementability and improves layer 13.As a result, as shown in Fig. 5 (C), formation makes release film 21, translucency functional layer 11, sandwich layer 12, cementability improve the laminate 25 obtained by lamination successively of layer 13.On it should be noted that After making film 22 that (complete solid) be fully cured to form translucency functional layer 11 in stating, make film 23 be fully cured (complete solid) to Sandwich layer 12 is formed, in addition, make film 24 that (complete solid) be fully cured improves layer 13 to form cementability, but it is also possible to making Film 24 is formed on film 23 in the state of film 22,23 semi-solid preparations (half is solid), is then fully cured film 22~24 (complete Gu)." being fully cured " in this specification refer to even if irradiate more ionizing rays on this basis and cure substantially Without " semi-solid preparation " refers to curing substantially to carry out if irradiating ionizing ray.

As shown in Fig. 5 (D), release film 21 is removed from translucency functional layer 11.The surface shape of release film 21 turns as a result, It prints to the surface 11A of translucency functional layer 11, optical film 15 shown in Fig. 2 can be obtained.

In the present embodiment, the calculation in 1 μm of square of the surface 11A of translucency functional layer 11 and the region of 5 μm of square Art mean roughness (Ra) be respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz) be respectively 4nm or more 20nm with Under, maximum crest height (Rp) be respectively 2nm or more 15nm hereinafter, therefore, the uniform and flat optics of surface 10A can be obtained Film 10,15.

In the present embodiment, surface 10A, 15A of optical film 10,15 are uniform and flat, therefore, even if not making levelling agent It is precipitated in surface 10A, 15A, can also reduce the contact angle relative to water.

In the present embodiment, by the surface 11A of the transferring surface shape of release film 21 to translucency functional layer 11, thus Realize 1 μm of square of surface 11A of translucency functional layer 11 and arithmetic average roughness (Ra) difference in the region of 5 μm of square It is respectively 4nm or more 20nm or less, maximum crest height (Rp) point for 0.5nm or more 1.5nm or less, maximum height of the profile (Rz) It Wei not 2nm or more 15nm or less.It should be noted that being made by being coated with translucency functional layer composition on Mght-transmitting base material The existing manufacturing method of its cured method etc is extremely hard to form translucency functional layer 11 as in this embodiment Specific surface shape.

In the present embodiment, by the surface 11A of the transferring surface shape of release film 21 to translucency functional layer 11, because This, is not influenced, easy to manufacture by additive contained in translucency functional layer 11.

<<<Polarizing coating>>>

Optical film 10,15 can for example be assembled in polarizing coating and use.It should be noted that in the present embodiment, light It learns film 10,15 to use as the protective film of polarizing coating, but the purposes of optical film 10,15 is not particularly limited.Fig. 6 is assembling It is another optical film for being assembled with present embodiment to have the schematic configuration of the polarizing coating of the optical film of present embodiment, Fig. 7 Another polarizing coating schematic configuration.As shown in fig. 6, polarizing coating 30 has：Polarizer 31 is bonded via bonding agent 32 In fitting in polarizer 31 as the optical film 10 of protective film on a face of polarizer 31 and via bonding agent 33 Protective film 34 on another side.In addition, as polarizing coating, as shown in fig. 7, can use have polarizer 31, via bonding Agent 32 fits on a face of polarizer 31 and fits in polarization as the optical film 15 of protective film and via bonding agent 33 The polarizing coating 35 of protective film 34 on the another side of element 31.Protective film 34 can be phase difference film.

Polarizer 31 can enumerate the polyethylene for being dyed and being uniaxially stretched using iodine or dichroism pigment Alcohol resin film.As polyvinyl alcohol resin, it can use and polyvinyl acetate system resin is carried out to the substance after saponification.Make It can also be enumerated other than as the polyvinyl acetate of the homopolymer of vinyl acetate for polyvinyl acetate system resin The copolymer etc. of vinyl acetate and the other monomers that can be copolymerized with it.As can with other monomers of vinyl acetate copolymerization, Such as it can enumerate：Unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class, the acrylic amide with ammonium Deng.

Polyvinyl alcohol resin can be modified, for example, it is also possible to using the modified polyvinyl alcohol contracting first of aldehydes is utilized Aldehyde, polyvinyl acetal etc..

<<Bonding agent>>

As bonding for making polarizer 31 be bonded with optical film 10,15 and polarizer 31 with protective film 34 Agent can be enumerated：Water system bonding agent, ionizing ray curability bonding agent.In the present specification, " water system bonding agent " refers to water The modes such as solution or lotion water-dispersed liquefied and be coated with and make water drying to carry out solidification bonding form bonding agent.Make For water system bonding agent, can enumerate：Polyethenol series bonding agent, epoxy bonding agent, acrylic-based adhesives etc..Wherein, lead to Polyethenol series bonding agent is often used in the fitting of polarizer.In addition, " ionizing ray curability bonding agent " refers to containing The bonding agent of form for having the adhesive composition irradiation ionizing ray of ionizing ray polymerizable compound and being bonded.As water It is bonding agent, ionizing ray curability bonding agent, known water system bonding agent, ionizing ray curability back and forth can be used Bonding agent.

<<Protective film>>

Protective film 34 is the film for protecting polarizer 31.Protective film 34, which not becomes, is used to form translucency functional layer 11 supporter, therefore, " base material " being not belonging in this specification.

As protective film 34, it is not particularly limited, it can be by for example selected from by polyethylene terephthalate or poly- naphthalene The cellulose-based resins such as the polyester based resins such as naphthalate, diacetyl cellulose or triacetyl cellulose, poly- methyl-prop The phenylethylene resin series such as the acrylic resins such as e pioic acid methyl ester, polystyrene or acrylonitritrile-styrene resin (AS resins) gather Carbonic ester system resin, polyethylene, polypropylene, ring system or polyolefin-based resins with norbornene structure, vinyl chloride-based resin, The amides such as nylon or aromatic polyamide based polymer, imide series polymer, sulfone based polymer, polyether sulfone system resin, polyethers Ether ketone system resin, polyphenylene sulfide system resin, vinyl alcohol resin, vinylidene chloride resin, vinyl butyral system resin, virtue More than one polymer are formed in the group of ester system resin, polyformaldehyde system resin and epoxy system resin composition.

<<<The manufacturing method of polarizing coating>>>

Polarizing coating 35 can for example make as described below.Fig. 8 is the polarizing coating for schematically showing present embodiment The figure of manufacturing process.First, as shown in Fig. 8 (A), the side that layer 13 connects is improved with the cementability of laminate 25 according to bonding agent 32 Formula, via bonding agent 32 by a laminated of laminate 25 and polarizer 31.On the other hand, it will be polarized via bonding agent 33 The another side of element 31 and 34 lamination of protective film.Here, via bonding agent 32 by a face of laminate 25 and polarizer 31 Before lamination, saponification process preferably is implemented to laminate 25 (optical film 15) in advance.If in translucency functional layer 11, sandwich layer 12 Middle addition levelling agent, it is likely that surface 13A that is mobile and being present in cementability raising layer 13, which occurs, for levelling agent nearby causes to make Obtaining reduces with the cementability of bonding agent 32, still, if implementing saponification process to laminate 25, can remove and be present in bonding Property improve levelling agent near the surface 13A of layer 13, therefore cementability can be further increased.

Then, as shown in Fig. 8 (B), bonding agent 32,33 is made to dry.In the case of using water system bonding agent as bonding agent, By the drying laminate 25 is bonded with polarizer 31 and protective film 34 with polarizer 31.In addition, using ionization In the case that ray-curable bonding agent is as bonding agent, after the drying, ionizing ray is irradiated to laminate, thus makes laminate It is bonded with polarizer with polarizer and protective film.

After laminate 25 is bonded with polarizer 31 and protective film 34 with polarizer 31 via bonding agent 32,33, As shown in Fig. 8 (C), release film 21 is removed from laminate 25.Polarizing coating 35 shown in Fig. 7 is obtained as a result,.

In optical film 15, it is provided with cementability on sandwich layer 12 and improves layer 13, therefore, it is possible to improve and bonding agent 32 Cementability.It, can be into one especially in the case where cementability improves layer 13 and contains the silane coupling agent with hydrolization group Step improves the cementability with bonding agent 32.That is, cementability improve layer 13 in silane coupling agent in saponification process or with it is bonding Hydrolization group occurs hydrolysis and generates silanol group when agent contacts.The hydroxyl of the silanol group and bonding agent forms hydrogen bond, leads to Crossing drying process makes dehydration condensation carry out, and forms covalent bond.It is bonding with bonding agent 32 thereby, it is possible to further increase Property.

In the present embodiment, cementability improves layer 13 containing the solidification for including multifunctional ionizing ray polymerizable compound In the case of the resin of object, with phase the case where resin containing the solidfied material comprising simple function ionizing ray polymerizable compound Than the higher layer of crosslink density can be formed, therefore, even if the cementability that ultra-violet absorber reaches sandwich layer 12 improves 13 side of layer Also glued property improves layer 13 and blocks on surface.Thereby, it is possible to further suppress the precipitation of ultra-violet absorber.

According to the present embodiment, the tensile break strength of optical film 15 is 30N/mm²In the case of above, can be had There is the optical film 15 of excellent in toughness.Here, if using the solidification containing multifunctional ionizing ray compound and silane coupling agent Property composition formed sandwich layer, then sandwich layer become really up to the mark, cannot obtain tensile break strength be 30N/mm²Above optical film.With This is opposite, according to the present embodiment, sandwich layer 12 and cementability is improved layer 13 and distinguished, therefore, it is strong can to obtain tension failure Degree is 30N/mm²Above optical film 15.

Such optical film 10,15 or polarizing coating 30,35 can for example be assembled in image display device and use.Fig. 9 is The schematic configuration of the image display device of present embodiment.

<<<Image display device>>>

As shown in figure 9, image display device 40 mainly has for showing the display panel 50 of image, being configured at display surface The backlight arrangement 60 of the back side of plate 50,70 and of touch panel that the person of closer looking at side is configured at compared with display panel 50 Translucency adhesive linkage 80 between display panel 50 and touch panel 70.In the present embodiment, display panel 50 is liquid LCD panel, therefore, image display device 40 have backlight arrangement 60, because the type of display panel (display element) also may be used Not have backlight arrangement 60.

<<Display panel>>

As shown in figure 9, display panel 50 is with fine from 60 side of backlight arrangement towards observer side successively lamination triacetyl Protective films 51, polarizer 52, protective film 53, translucency adhesive layer 54, display element 55, the translucency such as the plain film (TAC film) of dimension Structure made of adhesive layer 56, protective film 34, polarizer 31, optical film 10,15.Display panel 50 has 55 He of display element It is configured at the optical film 10 of the person of closer looking at side compared with display element 55, may not possess protective film 51 etc..It needs It is noted that in image display device 40 shown in Fig. 9, it is assembled with optical film 10, the replacement of optical film 15 can also be assembled Optical film 10.

As protective film 51,53, same as protective film 34, and the description is omitted.As composition transparent adhesive layer 54,56 Clear binder can enumerate pressure adhesive (PSA).

Display element 55 is liquid crystal display element.But display element 55 is not limited to liquid crystal display element, for example, can Think that organic electro-luminescent display unit (organic EL display element, Organic Light Emitting Diode (OLED)), inorganic EL are aobvious Show element (inorganic EL display elements) and/or light emitting diode with quantum dots (QLED).Liquid crystal display element is in two sheet glass bases Element configured with liquid crystal layer, alignment films, electrode layer, colour filter etc. between material.

Optical film 10 is configured at the person of closer looking at side compared with display element 55, and translucency functional layer 11 according to Sandwich layer 12 is configured compared to the mode for being configured at the person of closer looking at side.Surface 10A (the translucency work(of the observer side of optical film 10 The surface 11A of ergosphere 11) connect with translucency adhesive linkage 80.

<<Backlight arrangement>>

Backlight arrangement 60 illuminates display panel 50 from the back side of display panel 50.As backlight arrangement 60, well known backlight arrangement can be used, in addition, backlight arrangement 60 can be the backlight of edge light type, full run-down type Any one of device.

<<Touch panel>>

Touch panel 70 has：Sensor portion 90, the protection that the person of closer looking at side is configured at compared with sensor portion 90 Glass 100 and for by sensor portion 90 and 100 fixed transparent adhesive layer 101 of protective glass.Touch panel 70 has sensing Device portion 90 may not possess protective glass 100, transparent adhesive layer 101.

Sensor portion 90 is the part functioned as the sensor of touch panel 50.As sensor portion 90, do not have It is particularly limited to, such as the sensor used in projection type electrostatic capacitance method can be enumerated.90 shape of sensor portion shown in Fig. 7 By the base material film 91 for being provided with patterned conductive layer 92 and it is provided with patterned conductive layer as via transparent adhesive layer 94 Structure made of 93 91 lamination of base material film.

Base material film 91 shown in Fig. 9 has：Mght-transmitting base material 95, the hard painting being set on a face of Mght-transmitting base material 95 Layer 96, the high refractive index layer 97 being set on hard conating 96, the low-index layer 98 being set on high refractive index layer 97 and lamination In the hard conating 99 on the another side of Mght-transmitting base material 95.

It can use base material film as described below that base material film 91, the base material film is replaced to have：Mght-transmitting base material is set to Hard conating on one face of photosensitiveness base material, the high refractive index layer being set on hard conating, be set to it is low on high refractive index layer Index layer, the hard conating being set on the another side of Mght-transmitting base material, the high refractive index layer being set on hard conating and lamination Low-index layer on the high refractive index layer.In this case, divide on the two-sided low-index layer for be present in base material film Patterned conductive layer is not set.

As Mght-transmitting base material 95, hard conating 96,99, high refractive index layer 97 and low-index layer 98, can use logical Mght-transmitting base material, hard conating, high refractive index layer used in normal contact panel sensor and low-index layer, therefore, In this description will be omitted.

The shape of conductive layer 92,93 is not particularly limited, such as can enumerate square, striated.Conductive layer 92,93 passes through It is connect with portion of terminal (not shown) by taking-up pattern (not shown).Conductive layer 92,93 illustrates being made of transparent conductive material Example, but conductive layer can also be made of latticed conducting wire.As transparent conductive material, can enumerate：The oxidation of tin dope Tin oxide (ATO), zinc oxide, the indium oxide (In of indium (ITO), Sb doped₂O₃), aluminium doping zinc oxide (AZO), gallium doping The gold such as zinc oxide (GZO), tin oxide, zinc oxide-Sn system, indium oxide-tin oxide system, zinc oxide-indium oxide-magnesia system Belong to oxide etc..As the material of conducting wire, can enumerate：Silver, copper, aluminium or their alloy etc. have the metal material of light-proofness Material.

The film thickness of conductive layer 92,93 is suitably set according to the specification etc. of resistance, such as preferably 10nm or more 50nm or less.

The forming method of conductive layer 92,93 is not particularly limited, and can use sputtering method, vacuum vapour deposition, ion plating Method, CVD method, rubbing method, print process etc..As by the method for conductive layer pattern, such as photoetching process can be enumerated.

In the case that conductive layer is made of latticed conducting wire, the width of conducting wire is preferably 1 μm or more 20 μm hereinafter, more excellent It is selected as 2 μm or more 15 μm or less.Thereby, it is possible to conducting wire is reduced to and can be neglected on influence caused by the image that observer is seen Degree slightly.

In the case that conductive layer is made of latticed conducting wire, conductive layer has the opening of such as rectangle formed by conducting wire Portion.The aperture opening ratio of conductive layer is suitably set according to the characteristic etc. for the image light released by display device, for instance in 80% or more In 90% or less range.In addition, the configuration spacing of opening portion according to required aperture opening ratio, the width of conducting wire value and It is suitably set in 100 μm or more 1000 μm or less of range.

<<Translucency adhesive linkage>>

Translucency adhesive linkage 80 between display panel 50 and touch panel 70, and with display panel 50 and touch surface Both plates 70 bonding.Display panel 50 and touch panel 70 are fixed as a result,.Translucency adhesive linkage 80 is by containing curable resin The curability adhesive linkage of the liquid of precursor is with composition (for example, OCR：Optically clear resin, optical clear resin) Solidfied material constitute.

When being fixed display panel 50 and touch panel 90 using translucency adhesive linkage 80, first, in translucency functional layer It is coated with liquid curability adhesive linkage composition on 11 surface 11A, forms the film of curability adhesive linkage composition. Then, to the film irradiation light of curability adhesive linkage composition or apply heat across touch panel 90, to make the film Solidification.As a result, while forming translucency adhesive linkage 80 so that display panel 50 is be bonded via translucency with touch panel 70 Layer 80 and integration is fixed.

The film thickness of translucency adhesive linkage 80 is preferably 10 μm or more 50 μm or less.If the film thickness of translucency adhesive linkage is less than 10 μm, then cause to generate interference in display panel sometimes due to excessively thin；In addition, if the film thickness of translucency adhesive linkage is more than 50 μ M then excessively expends manufacturing cost.The film thickness of translucency adhesive linkage can be observed by using scanning electron microscope (SEM) The section of translucency adhesive linkage is found out.Specifically, using the image of scanning electron microscope, measure in one image The film thickness of translucency adhesive linkage at 3 carries out above-mentioned measurement to 5 images, calculates the average value of measured film thickness.

[second embodiment]

Hereinafter, it is aobvious to be directed at the optical film of second embodiment of the present invention, polarizing coating and image while refer to the attached drawing Showing device illustrates.It should be noted that about the content repeated with first embodiment, omit the description.In addition, Figure 10 is The schematic configuration of the optical film of present embodiment, Figure 11 are the schematic configurations of another optical film of present embodiment. Figure 12 is the schematic configuration of the polarizing film of present embodiment, and Figure 13 is the schematic structure of another polarizing film of present embodiment Cheng Tu, Figure 14 are the schematic configurations of the image display device of present embodiment.

<<<Optical film>>>

Optical film 110,115 shown in Figure 10 and Figure 11 is that do not have base material, the i.e. optical film without base material.Optical film 110 Have translucency functional layer 111 and lamination in the sandwich layer 12 of translucency functional layer 111.But optical film 110 has translucency work( Ergosphere 111 may not possess sandwich layer 12.In addition, as optical film, however it is not limited to optical film 110, as shown in figure 11, Can also use have translucency functional layer 111, lamination in translucency functional layer 111 sandwich layer 12 and be set to sandwich layer 12 with Cementability on the face of the face opposite side of 111 side of translucency functional layer improves the optical film 115 of layer 13.Optical film 110,115 Surface 110A, 115A become translucency functional layer 111 surface 111A.Optical film 110 with surface 110A opposite side Face, that is, back side 110B becomes the surface 12A of sandwich layer 12, optical film 115 with face, that is, back side 115B of surface 115A opposite side at The surface 13A of layer 13 is improved for cementability.

In the present embodiment, translucency functional layer 111 has hard conating 112 and lamination in a face of hard conating 112 On low-index layer 113, the face 111A that the surface 113A of low-index layer 113 becomes translucency functional layer 111 is (following The face is known as " surface of translucency functional layer ").In addition, 12 lamination of sandwich layer is in the another side 111B of translucency functional layer 111 (face is known as " back side of translucency functional layer " below) side.Optical film 110,115 can be in hard conating 112 and low-refraction Have other layers (such as high refractive index is in high refractive index layer of the refractive index of hard conating 112) between layer 113.In Figure 10 and Figure 11 In, label is identical as Fig. 1 and component shown in Fig. 2 as the component of Fig. 1 and Fig. 2 the same symbols, and and the description is omitted.

In the present embodiment, and on the (surfaces of low-index layer 113 surface 111A of translucency functional layer 111 In the region of 1 μm of square and 5 μm of square 113A), arithmetic average roughness (Ra) is respectively 0.5nm or more 1.5nm or less, wheel It is respectively 2nm or more 15nm or less that wide maximum height (Rz), which is respectively 4nm or more 20nm or less, maximum crest height (Rp),. In present embodiment, using tri- parameters of Ra, Rz and Rp come the surface shape of regulation translucency functional layer for it is first real Apply the same reason of mode.

If the Ra in 1 μm of square on the surface of translucency functional layer and the region of 5 μm of square is less than 0.5nm, having can Can due to excess smoothness and optical film is pasted each other when by optical film wound into rolls；In addition, if Ra is more than 1.5nm, it is likely that due to the bumps on the surface of translucency functional layer to all directions diffusing reflection occurs for exterior light, therefore, will The tone of picture when the extinguishing of image display device when optical film is assembled in image display device will not it is so black and because The bumps on surface cause haze value to increase and the transparency is damaged.

If the Rz in 1 μm of square on the surface of translucency functional layer and the region of 5 μm of square is less than 4nm, it is likely that Due to excess smoothness, optical film is pasted each other when by optical film wound into rolls；In addition, if Rz is more than 20nm, It is possible that due to the bumps on the surface of translucency functional layer to all directions diffusing reflection occurs for exterior light, therefore, by optical film group The tone of picture when the extinguishing of image display device when loaded on image display device will not be so black and recessed because of surface It is convex to lead to that haze value increases and the transparency is impaired.

If the Rp in 1 μm of square on the surface of translucency functional layer and the region of 5 μm of square is less than 2nm, it is likely that Due to excess smoothness, optical film is pasted each other when by optical film wound into rolls；In addition, if Rp is more than 15nm, It is possible that due to the bumps on the surface of translucency functional layer to all directions diffusing reflection occurs for exterior light, therefore, by optical film group The tone of picture when the extinguishing of image display device when loaded on image display device will not contact so black, relative to water Angle increases and the transparency is impaired due to haze value is caused to increase for the bumps on surface.

See in 1 μm of square of the surface 111A (the surface 113A of low-index layer 113) of translucency functional layer 111 and 5 μm In the region of side, the lower limit of Ra is respectively preferably 0.6nm or more, and the upper limit of Ra is respectively preferably 1.0nm or less.In addition, saturating In 1 μm of square of surface 111A (the surface 113A of low-index layer 113) of photosensitiveness functional layer 111 and the region of 5 μm of square, Rz Lower limit be respectively preferably 5.0nm or more, the upper limit of Rz is respectively preferably 15nm or less.On the surface of translucency functional layer 111 In 1 μm of square of 111A (the surface 113A of low-index layer 113) and the region of 5 μm of square, the lower limit of Rp is respectively preferably The upper limit of 3.0nm or more, Rp are respectively preferably 10nm or less.

<<Hard conating>>

The translucency functional layer 11 illustrated in hard conating 112 and first embodiment is same, therefore, in this description will be omitted. But in 1 μm of square on the surface of hard conating 112 and the region of 5 μm of square, it may not be arithmetic average roughness (Ra) Respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz) are respectively 4nm or more 20nm or less, maximum crest height (Rp) it is respectively 2nm or more 15nm or less.

<<Low-index layer>>

Low-index layer 113 is the table in optical film 110,115 in the light (such as fluorescent lamp, natural light etc.) from outside Layer when face is reflected for making its reflectivity reduce.Low-index layer 113 has the refractive index less than hard conating 111.Tool For body, for example, low-index layer 113 preferably has 1.45 refractive index below, more preferably there are 1.42 refractive index below.

The thickness of low-index layer 113 does not limit, and is usually suitably set in the range of 30nm~1 μm or so. The thickness d of low-index layer 13_A(nm) following formula (1) is preferably satisfied.

d_A=m λ/(4n_A)…(1)

In above-mentioned formula, n_AIndicate that the refractive index of low-index layer, m indicate that positive odd number, preferably 1, λ are wavelength, preferably For the value of 480nm or more 580nm ranges below.

From the viewpoint of antiradar reflectivity, low-index layer 113 preferably satisfies following formula (2).

120<n_Ad_A<145…(2)

Low-index layer can be obtained by effect using single layer, but for adjusting lower minimum reflectivity or higher The purpose of minimum reflectivity can also be appropriately arranged with 2 layers or more low-index layers.The feelings of 2 layers or more of low-index layer are set Under condition, difference preferably is set between the refractive index and thickness of each low-index layer.

As low-index layer 113, can be made of the layer containing low-refraction particle and binder resin.

<Low-refraction particle>

As low-refraction particle, such as the solid or hollow particle being made of silica or magnesium fluoride can be enumerated Deng.Wherein, preferably hollow silica particle, such hollow silica particles can for example pass through Japanese Unexamined Patent Publication 2005- Manufacturing method described in the embodiment of No. 099778 bulletin makes.

In hollow particle, preferably average primary particle diameter is 1nm or more 100nm hollow silica particles below.It is hollow The average primary particle diameter of silica dioxide granule is such as can be by section electron microscope (preferably transmission electron TEM, STEM Electron microscope that microscope and multiplying power are 50,000 times or more) imagery exploitation image processing software find out.Furthermore it is possible to make With the section electron microscope (electron microscopic that preferably transmission electron microscopes such as TEM, STEM and multiplying power are 50,000 times or more Mirror) image, consider engineer's scale, by calculating average value manually, thus find out the average primary grain of hollow silica particle Diameter.In this case, in an image, 10 hollow dioxies are selected in hollow silica particle from larger-size particle Silicon carbide particle carries out aforesaid operations to 5 images, and average value is calculated by totally 50 hollow silica particles.In addition, if it is Hollow silica particle is in the presence of simple substance, i.e. hollow silica particle is mixed into low-index layer, low-refraction Stage before layer composition, then the average primary particle diameter of hollow silica particle can be surveyed using laser scattering method It is fixed.The measurement result and the result of the image calculating by section electron microscope obtained based on laser scattering method is roughly equal.

As low-refraction particle, it is preferable to use there is the silica dioxide granule (reaction of optical polymerism functional group on surface Property silica dioxide granule).It is such to have the silica dioxide granule of optical polymerism functional group be by using silane on surface Coupling agent etc. is surface-treated silica dioxide granule to produce.As utilization silane coupling agent to silica dioxide granule The method that surface is handled can be enumerated：The dry process of silane coupling agent is sprayed to silica dioxide granule, makes silica The grain dispersion damp process etc. that addition silane coupling agent is reacted afterwards in a solvent.

Binder resin can use material same as the material illustrated in the column of the resin of translucency functional layer.

<<<The manufacturing method of optical film>>>

Optical film 110,115 can for example make as described below.First, same as first embodiment, prepare release Film 21.After preparing release film 21, it is coated on a face of release film 21 and contains low-refraction particle and ionizing ray polymerism Compound or composition for low refractive index layer containing fluorine-containing ionizing ray polymerizable compound, make it dry, to shape At the film of composition for low refractive index layer.Then, the light such as ultraviolet light are irradiated to film, make ionizing ray polymerizable compound or Fluorine-containing ionizing ray polymerizable compound polymerization (crosslinking), thus makes curing of coating, to form low-index layer 113.

After forming low-index layer 113, by the step same as first embodiment, the shape on low-index layer 113 At hard conating 112 and sandwich layer 12；Or it forms hard conating 112, sandwich layer 12 and cementability on low-index layer 113 and improves Layer 13.

After forming sandwich layer 12 on hard conating 112 or forming sandwich layer 12 and cementability raising layer 13, by release film 21 It is removed from low-index layer 113.The transferring surface shape of release film 21 can be obtained to the surface of low-index layer 113 as a result, Optical film 110,115 shown in Figure 10 and Figure 11.

In the present embodiment, 1 μ of the surface 111A (the surface 113A of low-index layer 113) of translucency functional layer 111 Arithmetic average roughness (Ra) in the region of m square and 5 μm of square is respectively 0.5nm or more 1.5nm or less, the maximum height of profile It is respectively 2nm or more 15nm hereinafter, therefore, can obtain that degree (Rz), which is respectively 4nm or more 20nm or less, maximum crest height (Rp), The optical film 110,115 uniform and flat to surface 110A.

In the present embodiment, the surface 111A (the surface 113A of low-index layer 113) of translucency functional layer 111 is uniform And it is flat, the tone therefore, it is possible to picture when making the extinguishing of image display device becomes more black.That is, low-index layer is usual Containing particles such as silica dioxide granules, therefore, the surface of low-index layer is easy to form bumps.Therefore, although keeping exterior light anti- Reduction is penetrated, still, due to the bumps on the surface of low-index layer to all directions diffusing reflection occurs for exterior light, picture when extinguishing Tone whiten.In contrast, in the present embodiment, the surface 111A (low-index layers of optical transmission functional layer 111 113 surface 113A) it is uniform and flat, the tone therefore, it is possible to picture when making the extinguishing of image display device becomes more black. Therefore, when optical film 110 being set to image display device, even if putting out for image display device can be made if under exterior light The tone of picture when going out and the tone for the black framework for surrounding picture match, and thereby, it is possible to realize image display device There are the designs of a body-sensing between picture and framework.

<<<Polarizing coating>>>

As shown in FIG. 12 and 13, optical film 110,115 can be assembled in and the polarizing coating that illustrates in first embodiment 30, in the polarizing coating 120,125 of 35 same structures.In Figure 12 and Figure 13, the component of label and Fig. 6 and Fig. 7 the same symbols Identical as Fig. 6 and component shown in Fig. 7, and the description is omitted.Polarizing coating 125 can pass through method system same as polarizing coating 35 Make.

<<<Image display device>>>

As shown in figure 14, optical film 110,115 can be assembled in image display device 130.Image display device 130 does not have Standby touch panel.Optical film 110 is assembled in display panel 140, constitutes the outermost of the close observer side of image display device 130 Surface.Specifically, the surface 113A of low-index layer 113 becomes the surface of the close observer side of image display device 130. In fig. 14, label is component identical with component shown in Fig. 9 with the component of Fig. 9 the same symbols, and and the description is omitted.It needs Illustrate, in the image display device 130 shown in Figure 14, is assembled with optical film 110, but optical film 115 can also be assembled Instead of optical film 110.

[third embodiment]

Hereinafter, be directed at while refer to the attached drawing third embodiment of the present invention polarizing coating and image display device into Row explanation.It should be noted that about with first and second embodiment duplicate contents, omit the description.In addition, Figure 15 is this The schematic configuration of the polarizing coating of embodiment, Figure 16~Figure 18 are the systems for the polarizing coating for schematically showing present embodiment Make the figure of process.

<<<Polarizing coating>>>

First, polarizing coating 140 shown in figure 15 is that do not have base material, the i.e. polarizing coating without base material.As shown in figure 15, it polarizes Film 140 has translucency functional layer 141 and is set to the polarizer 142 of a surface side of translucency functional layer 141.Figure 15 institutes The polarizing coating 140 shown is further equipped with the sandwich layer 143 being set between translucency functional layer 141 and polarizer 142 and is bonded Protective film 144 on the face with the face opposite side of 141 side of translucency functional layer of polarizer 142.Polarizer 142 with Sandwich layer 143 is bonded via bonding agent 145, in addition, polarizer 142 is bonded with protective film 144 via bonding agent 146.In this reality It applies in mode, not only protective film 144, translucency functional layer 141 and sandwich layer 143 are also functioned as protective film.But partially Vibrating diaphragm 140 has translucency functional layer 141 and polarizer 142, may not possess sandwich layer 143, protective film 144.

Translucency functional layer 141, polarizer 142, sandwich layer 143, protective film 144, bonding agent 145,146 and translucency work( Ergosphere 11, polarizer 31, sandwich layer 12, protective film 34, bonding agent 32,33 are same, therefore in this description will be omitted.That is, above-mentioned The whole records for being related to translucency functional layer 11, polarizer 31, sandwich layer 12, protective film 34, bonding agent 32,33 can be applied to Photosensitiveness functional layer 141, polarizer 142, sandwich layer 143, protective film 144, bonding agent 145,146.But in translucency functional layer In 1 μm of square (1 1 μm of μ m) of 141 surface 141A and the region of 5 μm of square (5 5 μm of μ m), arithmetic average roughness (Ra) be respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz) it is respectively 4nm or more 20nm or less, maximum crest height of wave Degree (Rp) is respectively 2nm or more 15nm hereinafter, still, Ra, Rz, Rp at the 141A of surface not necessarily fall into the range.

<<<The manufacturing method of polarizing coating>>>

Polarizing coating 140 can for example make as described below.First, prepare the release film 151 as shown in Figure 16 (A) etc.. Release film 151 is same as release film 21, therefore, in this description will be omitted.

After preparing release film 151, as shown in Figure 16 (A), light transmission sexual function is coated on a face 151A of release film 151 Layer composition, makes it dry, to form the film 152 of translucency functional layer composition.Translucency functional layer combines Object is same as the translucency functional layer composition illustrated in the column of the manufacturing method of above-mentioned optical film, therefore, omits say herein It is bright.

Then, ionizing ray is irradiated to film 152 as shown in Figure 16 (B), the ionization as curable resin precursor is made to penetrate Line polymerizable compound polymerize (crosslinking), thus cures film 152, to form translucency functional layer 152.Here, solidification When, if carrying out nitrogen purging, translucency functional layer over-curing, it is therefore preferable that making the case where being purged without nitrogen Translucency functional layer cures.

After forming translucency functional layer 141 on release film 151, as shown in Figure 16 (C), in translucency functional layer 141 Contain the ionizing ray polymerism chemical combination as curable resin precursor with coating on the face of the face opposite side of 151 side of release film The sandwich layer composition of object, makes it dry, to form the film 153 of sandwich layer composition.Sandwich layer composition and above-mentioned light It is same to learn the sandwich layer composition illustrated in the column of the manufacturing method of film, therefore in this description will be omitted.

Then, as shown in Figure 17 (A), ionizing ray is irradiated to film 153, ionizing ray polymerizable compound is made to polymerize (crosslinking) thus cures film 153, to form sandwich layer 143.

It is opposite with 151 side of release film in translucency functional layer 141 after forming sandwich layer 143 in translucency functional layer 141 Side is bonded polarizer 142.In the present embodiment, in translucency functional layer 141 and 151 side opposite side shape of release film At sandwich layer 143, therefore, as shown in Figure 17 (B), on the face with the face opposite side of 141 side of translucency functional layer of sandwich layer 143 It is bonded polarizer 142 via bonding agent 145.It is preferably real to sandwich layer 143 in advance when by polarizer 142 and 143 lamination of sandwich layer Apply saponification process.By implementing saponification process, become good with the cementability of polarizer 14.

Then, as shown in Figure 17 (C), in the face with the face opposite side of 141 side of translucency functional layer of polarizer 142 On via bonding agent 146 be bonded protective film 144.

After being bonded protective film 144, release film 151 is removed from translucency functional layer 141 as shown in figure 18.Thus, it is possible to Obtain polarizing coating 140 as shown in figure 15.It should be noted that if release film 151 removed from translucency functional layer 141, Then the transferring surface shape of release film 151 to translucency functional layer 141 surface 141A.

In the present embodiment, translucency functional layer 141 is formed on release film 151, then removes release film 151, Therefore, the polarizing coating 140 that the base material of Mght-transmitting base material etc is not present can be obtained.For base material, even if thin, generally also At least with 25 μm or more of thickness, therefore, even if in the case where forming other layers in translucency functional layer, and has base material Polarizing coating compared to also the thickness of polarizing coating capable of being made thinning.Thereby, it is possible to realize the slimming of polarizing coating.

In the present embodiment, in 1 μm of square of the surface 141A of translucency functional layer 141 and the region of 5 μm of square It is respectively 4nm or more 20nm that arithmetic average roughness (Ra), which is respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz), Below, maximum crest height (Rp) is respectively 2nm or more 15nm hereinafter, therefore, it is uniform and flat can to obtain surface 140A Polarizing coating 140.

In the present embodiment, the surface 140A of polarizing coating 140 can be made uniform and flat, therefore, even if not making levelling The contact angle that can also reduce relative to water is precipitated in surface 140A for agent.

In the present embodiment, by the surface 141A of the transferring surface shape of release film 151 to translucency functional layer 141, The arithmetic average roughness in 1 μm of square of surface 141A and the region of 5 μm of square to realize translucency functional layer 141 (Ra) be respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz) it is respectively 4nm or more 20nm or less, maximum crest height of wave It is respectively 2nm or more 15nm or less to spend (Rp).It should be noted that being used using translucency functional layer is coated on Mght-transmitting base material Composition makes the existing manufacturing method of its cured method etc, is extremely hard to form translucency as in this embodiment The specific surface shape of functional layer 11.

In the present embodiment, by the surface 141A of the transferring surface shape of release film 151 to translucency functional layer 141, Accordingly, it is difficult to be influenced by additive contained in translucency functional layer 141, easy to manufacture.

Such polarizing coating 140 can for example be assembled in image display device same as image display device and make With.Be assembled with the image display device of polarizing coating 140 can be set as other than using polarizing coating 140 to replace polarizing coating 30 and 40 same structure of image display device, therefore, in this description will be omitted.

[the 4th embodiment]

Hereinafter, be directed at while refer to the attached drawing the present invention the 4th embodiment polarizing coating and image display device into Row explanation.It should be noted that about the content repeated with first~third embodiment, omit the description.In addition, Figure 19 is this The schematic configuration of the polarizing coating of embodiment, Figure 20~Figure 22 are the systems for the polarizing coating for schematically showing present embodiment Make the figure of process.

<<<Polarizing coating>>>

Polarizing coating 160 shown in Figure 19 is that do not have base material, the i.e. polarizing coating without base material.Polarizing coating 160 has translucency The polarizer 142 of functional layer 161 and a surface side for being set to translucency functional layer 161.Polarizing coating 160 shown in Figure 19 into One step has the sandwich layer 143 being set between translucency functional layer 161 and polarizer 142 and is pasted on polarizer 142 With the protective film 144 on the face of the face opposite side of 161 side of translucency functional layer.Polarizer 142 is with sandwich layer 143 via bonding Agent 145 is bonded, in addition, polarizer 142 is bonded with protective film 144 via bonding agent 146.In the present embodiment, it not only protects Cuticula 144, and translucency functional layer 161 and sandwich layer 143 are also functioned as protective film.But polarizing coating 160 has Photosensitiveness functional layer 161 and polarizer 142 may not possess sandwich layer 143, protective film 144.In Figure 19, label with The component of Figure 15 the same symbols is component identical with component shown in figure 15, and and the description is omitted.

Translucency functional layer 161 has hard conating 162 and lamination in the low-index layer on a face of hard conating 162 163, the surface 163A of low-index layer 163 becomes the surface 160 of polarizing coating 160 and the surface of translucency functional layer 161 161A.Polarizing coating 160 can have other layers (for example, high refractive index is in hard between hard conating 162 and low-index layer 163 The high refractive index layer of the refractive index of coating 162).

It is translucency functional layer 161, hard conating 162, low-index layer 163 and translucency functional layer 111, hard conating 112, low Index layer 113 is same, therefore, in this description will be omitted.That is, above-mentioned about translucency functional layer 111, hard conating 112, low refraction Whole record of rate layer 113 can be applied to translucency functional layer 161, hard conating 162, low-index layer 163.But in light transmission In 1 μm of square (1 1 μm of μ m) of the surface 161A of sexual function layer 161 and the region of 5 μm of square (5 5 μm of μ m), arithmetic average Roughness (Ra) be respectively 0.5nm or more 1.5nm or less, maximum height of the profile (Rz) be respectively 4nm or more 20nm or less, it is maximum Crest height (Rp) is respectively 2nm or more 15nm hereinafter, still, Ra, Rz, Rp at the 161A of surface not necessarily fall into the model It encloses.

<<<The manufacturing method of polarizing coating>>>

Polarizing coating 160 can for example make as described below.First, prepare the release film 151 as shown in Figure 20 (A).It is accurate After standby release film 151, as shown in Figure 20 (A), it is coated on a face 151A of release film 151 and contains low-refraction particle and work For the ionizing ray polymerizable compound of curability binder resin precursor or containing as curability binder resin precursor Fluorine-containing ionizing ray polymerizable compound composition for low refractive index layer, make it dry, to form low-index layer With the film 171 of composition.

Then, as shown in Figure 20 (B), ionizing ray is irradiated to film 171, makes ionizing ray polymerizable compound or fluorine-containing Ionizing ray polymerizable compound polymerization (crosslinking), thus make film 171 solidification, to form low-index layer 163.

After forming low-index layer 163 on release film 151, as shown in Figure 20 (C), it is coated on low-index layer 163 Composition for hard coat makes it dry, to form the film 172 of composition for hard coat.Composition for hard coat and third The translucency functional layer composition illustrated in embodiment is same, in this description will be omitted.

Then, ionizing ray is irradiated to film 172 as shown in Figure 21 (A), the polymerization of ionizing ray polymerizable compound is made (to hand over Connection), thus cure film 123, to form hard conating 162.

After forming hard conating 162 on release film 151, in hard conating 162 and 151 side of release film as shown in Figure 21 (B) Face opposite side face on be coated with the sandwich layer composition containing ionizing ray polymerizable compound, make it dry, to shape At the film 153 of sandwich layer composition.Sandwich layer composition is same as the sandwich layer composition illustrated in first embodiment, because This, in this description will be omitted.

Then, as shown in Figure 21 (C), ionizing ray is irradiated to film 153, ionizing ray polymerizable compound is made to polymerize (crosslinking) thus cures film 153, to form sandwich layer 143.

After forming sandwich layer 143 on hard conating 162, polarization is bonded with 151 side opposite side of release film in hard conating 162 Element 142.In the present embodiment, sandwich layer 143 is formed in hard conating 162 and 151 side opposite side of release film, therefore, such as Shown in Figure 22 (A), polarization member is bonded via bonding agent 145 in sandwich layer 143 on the face of the face opposite side of 162 side of hard conating Part 142.When polarizer 142 being made to be bonded with sandwich layer 143, saponification process preferably is implemented to sandwich layer 143 in advance.By implementing saponification Processing, becomes good with the cementability of polarizer 142.

Then, it as shown in Figure 22 (B), is passed through on the face with the face opposite side of low-index layer 163 of polarizer 142 Protective film 144 is bonded by bonding agent 146.

After being bonded protective film 144, release film 151 is removed from low-index layer 163 as shown in Figure 22 (C).Thus, it is possible to Obtain polarizing coating 160 as shown in figure 19.If release film 151 removed from low-index layer 163, the table of release film 151 Face shape is transferred to the surface 163A of low-index layer 163.

In the present embodiment, translucency functional layer 161 is formed on release film 151, then removes release film 151, Therefore, the polarizing coating 160 that the base material of Mght-transmitting base material etc is not present can be obtained.For base material, even if thin, generally also At least with 25 μm or more of thickness, therefore, even if in the case where forming other layers in translucency functional layer 161, and have The polarizing coating of base material, which is compared, also can make the thickness of polarizing coating thinning.Thereby, it is possible to realize the slimming of polarizing coating.

In the present embodiment, 1 μ of the surface 161A (the surface 163A of low-index layer 163) of translucency functional layer 161 Arithmetic average roughness (Ra) in the region of m square and 5 μm of square is respectively 0.5nm or more 1.5nm or less, the maximum height of profile It is respectively 2nm or more 15nm hereinafter, therefore, can obtain that degree (Rz), which is respectively 4nm or more 20nm or less, maximum crest height (Rp), The polarizing coating 110 uniform and flat to surface 160A.

In the present embodiment, the surface 161A (the surface 163A of low-index layer 163) of translucency functional layer 161 is uniform And it is flat, the tone therefore, it is possible to picture when making the extinguishing of image display device becomes more black.That is, low-index layer is usual Containing particles such as silica dioxide granules, therefore, the surface of low-index layer is easy to form bumps.Therefore, although keeping exterior light anti- Reduction is penetrated, still, due to the bumps on the surface of low-index layer to all directions diffusing reflection occurs for exterior light, picture when extinguishing Tone whiten.In contrast, in the present embodiment, the surface 161A (low-index layers of optical transmission functional layer 161 163 surface 163A) it is uniform and flat, the tone therefore, it is possible to picture when making the extinguishing of image display device becomes more black. Therefore, when polarizing coating 110 being set to image display device, even if putting out for image display device can be made if under exterior light The shade-matched blend of the tone of picture when going out and the framework for the black for surrounding picture, thus, it is possible to realize the picture of image display device There are the designs of a body-sensing between face and framework.

Such polarizing coating 160 can for example be assembled in image display device same as image display device and make With.Be assembled with the image display device of polarizing coating 160 can be set as other than using polarizing coating 160 to replace polarizing coating 30 and 40 same structure of image display device, therefore, in this description will be omitted.

Embodiment

In order to be described in detail to the present invention, it is exemplified below embodiment and illustrates, but the present invention is not limited to this It is a little to record.It should be noted that following " 100% scaled values of solid constituent " is to be set as the solid constituent in solvent dilution product Value when 100%.

First, each ingredient of mixture in the way of the composition being as follows, obtains composition for hard coat etc..

(composition for hard coat 1)

(inorganic particle, ProductName " ELCOM V8803 " wave catalyst chemical conversion corporation day to reactive abnormity silica It makes)：30 mass parts

Ethylene-oxide-modified bisphenol a diacrylate (ProductName " BPE-20 ", the manufacture of the first industrial pharmaceutical company, Two functions)：56 mass parts

Urethane acrylate prepolymer (ProductName " UN-350 ", the manufacture of Gen Shang industrial groups, weight average molecular weight 12500, two function)：14 mass parts

Polymerization initiator (ProductName " Irgacure 184 ", the manufacture of BASF JAPAN companies)：4 mass parts

Levelling agent (ProductName " F568 ", the manufacture of DIC companies)：0.1 mass parts (100% scaled value of solid constituent)

Methyl iso-butyl ketone (MIBK) (MIBK)：150 mass parts

(composition for hard coat 2)

(inorganic particle, ProductName " ELCOM V8803 " wave catalyst chemical conversion corporation day to reactive abnormity silica It makes)：45 mass parts

Ethylene-oxide-modified bisphenol a diacrylate (ProductName " BPE-20 ", the manufacture of the first industrial pharmaceutical company, Two functions)：44 mass parts

Urethane acrylate prepolymer (ProductName " UN-350 ", the manufacture of Gen Shang industrial groups, weight average molecular weight 12500, two function)：11 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：150 mass parts

(composition for hard coat 3)

Reactive abnormity silica (ProductName " ELCOM V8803 " waves the manufacture of catalyst chemical conversion company day)：60 mass Part

Ethylene-oxide-modified bisphenol a diacrylate (ProductName " BPE-20 ", the manufacture of the first industrial pharmaceutical company, Two functions)：32 mass parts

Urethane acrylate prepolymer (ProductName " UN-350 ", the manufacture of Gen Shang industrial groups, weight average molecular weight 12500, two function)：8 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：150 mass parts

Each ingredient of mixture in the way of the composition being as follows, obtains sandwich layer composition 1.

(sandwich layer composition 1)

Urethane acrylate (ProductName " UV-3310B ", the manufacture of synthesis chemical company of Japan, weight average molecular weight 5000, two function)：40 mass parts

Ultra-violet absorber (ProductName " TINUVIN400 ", the manufacture of BASF JAPAN companies)：3 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：60 mass parts

(sandwich layer composition 2)

Polyester acrylate (ProductName " M7100 ", East Asia Synesis Company manufacture, are multifunctional)：4 mass parts

Silane coupling agent (ProductName " A1597 ", the manufacture of Tokyo chemical conversion industry company, reactive functional groups：Acryloyl Base, hydrolization group：Methoxyl group)：1 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：60 mass parts

(cementability improves layer composition 1)

Polymerization initiator (ProductName " Irgacure 184 ", the manufacture of BASF JAPAN companies)：0.2 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：70 mass parts

Cyclohexanone：25 mass parts

(cementability improves layer composition 2)

Isocyanuric acid EO modified diacrylates and triacrylate (ProductName " M313 ", East Asia Synesis Company system It makes, two functions and trifunctional mixture)：4 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：70 mass parts

Cyclohexanone：25 mass parts

(cementability improves layer composition 3)

Silane coupling agent (ProductName " G0210 ", the manufacture of Tokyo chemical conversion industry company, reactive functional groups：Acryloyl Base, hydrolization group：Methoxyl group)：1 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：70 mass parts

Cyclohexanone：25 mass parts

Each ingredient of mixture, obtains coating composition in the way of the composition being as follows.

(coating composition 1)

2- ethylhexyl EO modification acrylates (ProductName " M-120 ", the manufacture of East Asia Synesis Company, simple function)：4 matter Measure part

Methyl iso-butyl ketone (MIBK) (MIBK)：70 mass parts

Cyclohexanone：25 mass parts

(coating composition 2)

Methyl iso-butyl ketone (MIBK) (MIBK)：70 mass parts

Cyclohexanone：25 mass parts

Each ingredient of mixture, obtains composition for low refractive index layer in the way of the composition being as follows.

(composition for low refractive index layer 1)

Ethylene-oxide-modified bisphenol a diacrylate (ProductName " BPE-20 ", the manufacture of the first industrial pharmaceutical company, two Function)：1.2 mass parts

Hollow silica particle (20 mass % of solid constituent, average primary particle diameter 50nm, voidage 40%)：7.4 Mass parts

Polymerization initiator (ProductName " Irgacure 127 ", BASF AG's manufacture)：0.2 mass parts

Levelling agent (ProductName " Seika Beam 10-28 (MB) ", industrial group's manufacture of refining big day)：0.05 mass Part

Dispersant (ProductName " KBM-5103 ", the manufacture of chemical company of SHIN-ETSU HANTOTAI)：0.05 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：91.1 mass parts

(composition for low refractive index layer 2)

Neopentyl glycol PO modified diacrylates (ProductName " Miramer M216 ", Japan's Chemicals corporations It makes, two functions)：1.2 mass parts

Methyl iso-butyl ketone (MIBK) (MIBK)：91.1 mass parts

First, prepare the poly terephthalic acid for having carried out single side and being easily bonded processing for being 100 μm as the thickness of release film Glycol ester film (ProductName " Cosmoshine A4100 ", Japan spin company's manufacture), in polyethylene terephthalate film Untreated side on be coated with hard coating composition 1, formed film.Then, for being formed by film, with the flow velocity of 0.5m/s It circulates after 15 seconds 50 DEG C of dry airs, further keeps it dry with 30 seconds 70 DEG C of dry airs of the flow rate of 10m/s It is dry, thus make the evaporation of the solvent in film, is 200mJ/cm according to accumulated light²Mode irradiate ultraviolet light to make film consolidate Change, thus forms the hard conating for being 5 μm as the film thickness of translucency functional layer.

After forming hard conating, it is coated with above-mentioned sandwich layer composition 1 on hard conating, forms film.Then, for being formed Film, after 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with the flow rate of 10m/s 30 seconds 70 DEG C of dry air makes it dry, and thus makes the evaporation of the solvent in film, is 300mJ/cm according to accumulated light²Mode shine Ultraviolet light is penetrated to make curing of coating, forms the sandwich layer that film thickness is 10 μm as a result,.It forms as a result, and has 5 μm of film thickness successively The thickness of the sandwich layer of 10 μm of hard conating and film thickness is 15 μm of optical films and the laminate being made of release film and optical film. The thickness of optical film is as described below：Using scanning electron microscope (SEM), the section of optical film is shot, the figure in its section The thickness of optical film at 20 is measured as in, is set as the average value of the thickness at 20.

Then, make laminate 2 equivalents, 55 DEG C of temperature sodium hydrate aqueous solution in impregnate 3 minutes, thus to laminate Carry out saponification process.On the other hand, polyvinyl alcohol mesentery is made to adsorb iodine, then, be uniaxially stretched makes its orientation, thus makes Polarizer, in addition, the double spread polyethenol series bonding agent in polarizer ((is produced polyvinyl alcohol resin using pure water The name of an article " PVA-117 ", the manufacture of KURARAY companies) it is diluted to the polyvinyl alcohol water solution after solid constituent 5%).

According to so that a face of polarizer is connected with the sandwich layer of optical film and make the another side of polarizer with into The mode that the triacetyl cellulose base material (TAC base materials) of 80 μm of the thickness of row saponification process connects, configuration optical film, polarization member Part, TAC base materials.In such a state, 10 minutes dry at 100 DEG C, obtain optical film and polarizer and TAC base materials Polarizing coating made of being bonded with polyethenol series bonding agent with polarizer.

Finally, polyethylene terephthalate film the surface dew of hard conating has been obtained into from the sur-face peeling of hard conating The polarizing coating gone out.

In embodiment A2, using composition for hard coat 2 replace composition for hard coat 1, in addition to this with embodiment A1 has got similarly optical film and polarizing coating.

In embodiment A3, using composition for hard coat 3 replace composition for hard coat 1, in addition to this with embodiment A1 has got similarly optical film and polarizing coating.

In embodiment A4, after forming sandwich layer, it is coated with cementability on sandwich layer and improves layer composition 1, formation film.It connects It, for being formed by film, after 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with 10m/s's 30 seconds 70 DEG C of dry airs of flow rate make it dry, and thus make the evaporation of the solvent in film, are according to accumulated light 100mJ/cm²Mode irradiate ultraviolet light, on sandwich layer formed film thickness be 500nm cementability improve layer, in addition to this Optical film and polarizing coating have been got similarly with embodiment A1.

In embodiment 5, improve layer composition 2 using cementability and cementability replaced to improve layer composition 1, except this with Outside optical film has been got similarly with embodiment A4.

In embodiment A6, improves layer composition 3 using cementability and cementability is replaced to improve layer composition 1, remove this In addition optical film has been got similarly with embodiment A4.

First, prepare the poly terephthalic acid for having carried out single side and being easily bonded processing for being 100 μm as the thickness of release film Glycol ester film (ProductName " Cosmoshine A4100 ", Japan spin company's manufacture), in polyethylene terephthalate film Untreated side on be coated with above-mentioned composition for low refractive index layer 1, form film.Then, for being formed by film, with After 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with the dry of 70 DEG C of the flow rate of 10m/s 30 seconds Dry air makes it dry, and thus makes the evaporation of the solvent in film, is 100mJ/cm according to accumulated light²Ultraviolet light is irradiated to make Curing of coating thus forms the low-index layer for being 110nm as the film thickness of translucency functional layer.

After forming low-index layer, it is coated with hard coating composition 1, forms film.Then, for being formed by film, with After 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with the dry of 70 DEG C of the flow rate of 10m/s 30 seconds Dry air makes it dry, and thus makes the evaporation of the solvent in film, is 200mJ/cm according to accumulated light²Mode irradiate ultraviolet light To make curing of coating, the hard conating for being 5 μm as the film thickness of translucency functional layer is thus formed.

After forming hard conating, it is coated with above-mentioned sandwich layer composition 1 on hard conating, forms film.Then, for being formed Film, after 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with the flow rate of 10m/s 30 seconds 70 DEG C of dry air makes it dry, and thus makes the evaporation of the solvent in film, is 300mJ/cm according to accumulated light²Mode shine Ultraviolet light is penetrated to make curing of coating, the sandwich layer that film thickness is 10 μm is consequently formed.It forms as a result, and has film thickness 110nm successively Low-index layer, 5 μm of film thickness hard conating and 10 μm of film thickness sandwich layer thickness be about 15.1 μm optical film, Yi Jiyou The laminate that release film and optical film are constituted.The thickness of optical film is as described below：Using scanning electron microscope (SEM), clap The section of photographic/optical film measures the thickness of optical film at 20 in the image in its section, is set as the average value of the thickness at 20.

Then, make laminate 2 equivalents, 55 DEG C of temperature sodium hydrate aqueous solution in impregnate 3 minutes, thus to laminate Carry out saponification process.On the other hand, polyvinyl alcohol mesentery is made to adsorb iodine, then, be uniaxially stretched makes its orientation, makes as a result, Make polarizer, and ((is produced polyvinyl alcohol resin using pure water in the double spread polyethenol series bonding agent of polarizer The name of an article " PVA-117 ", KURARAY corporations) it is diluted to the polyvinyl alcohol water solution after solid constituent 5%).

According to so that a face of polarizer is connected with the sandwich layer of optical film and make the another side of polarizer with into The mode that the triacetyl cellulose base material (TAC base materials) of 80 μm of the thickness of row saponification process connects, configuration optical film, polarization member Part, TAC base materials.In such a state, 10 minutes dry in 100 DEG C, obtain optical film and polarizer and TAC base materials Polarizing coating made of being bonded with polyethenol series bonding agent with polarizer.

Finally, polyethylene terephthalate film low-index layer has been obtained into from the sur-face peeling of low-index layer Surface expose polarizing coating.

In embodiment A8, after forming sandwich layer, it is coated with cementability on sandwich layer and improves layer composition 1, formation film.It connects It, for being formed by film, after 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with 10m/s's 30 seconds 70 DEG C of dry airs of flow rate make it dry, and thus make the evaporation of the solvent in film, are according to accumulated light 100mJ/cm²Mode irradiate ultraviolet light, on sandwich layer formed film thickness be 500nm cementability improve layer, in addition to this Optical film and polarizing coating have been got similarly with embodiment A7.

In embodiment A9, improves layer composition 2 using cementability and cementability is replaced to improve layer composition 1, remove this In addition optical film and polarizing coating have been got similarly with embodiment A8.

In embodiment A10, improves layer composition 3 using cementability and cementability is replaced to improve layer composition 1, remove this In addition optical film and polarizing coating have been got similarly with embodiment A8.

In comparative example 1, prepare triacetyl cellulose base material (ProductName " TD80UL M ", the Fujiphoto of 80 μm of thickness Company manufactures), it is coated with hard coating composition 1 on a face of triacetyl cellulose base material, forms film.Then, for institute The film of formation, after 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with the flow rate of 10m/s 30 Seconds 70 DEG C of dry air makes it dry, and thus makes the evaporation of the solvent in film, is 200mJ/cm according to accumulated light²Side Formula irradiates ultraviolet light to make curing of coating.The hard of 10 μm of triacetyl cellulose base material and film thickness is obtained having successively as a result, The optical film of coating.

Then, make optical film 2 equivalents, 55 DEG C of temperature sodium hydrate aqueous solution in impregnate 3 minutes, thus to optical film Carry out saponification process.On the other hand, polyvinyl alcohol mesentery is made to adsorb iodine, then, be uniaxially stretched makes its orientation, thus makes Polarizer, and ((produced polyvinyl alcohol resin using pure water in the two-sided upper pva coating system bonding agent of polarizer The name of an article " PVA-117 ", KURARAY corporations) it is diluted to the polyvinyl alcohol water solution after solid constituent 5%).

According to making a face of polarizer connect with the triacetyl cellulose base material of optical film and make polarizer The mode that another side connects with the other triacetyl cellulose base materials for 80 μm of thickness for having carried out saponification process, configuration optical film, Polarizer, triacetyl cellulose base material.In such a state, 10 minutes dry in 100 DEG C, obtain optical film and polarization Polarizing coating made of element and triacetyl cellulose base material are bonded with polarizer with polyethenol series bonding agent.

In Comparative examples A 2,50 μm gather to benzene of the thickness being surface-treated using non-silicone system mould release is used Naphthalate film (ProductName " TN100 ", Japan spin company's manufacture) replaces having carried out poly- pair that single side is easily bonded processing Ethylene terephthalate film has made optical film and polarizing coating in the same manner as embodiment A1 in addition to this.

In Comparative examples A 3, sandwich layer composition 1 is replaced using sandwich layer composition 2, it is same with Comparative examples A 2 in addition to this Optical film and polarizing coating are made to sample.

In Comparative examples A 4, formed after sandwich layer and before by release film stripping, Coating combines on sandwich layer Object 1 forms film.Then, for being formed by film, after 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, It is further made it dry with 30 seconds 70 DEG C of dry airs of the flow rate of 10m/s, thus makes the evaporation of the solvent in film, press It is 100mJ/cm according to accumulated light²Mode irradiate ultraviolet light, on sandwich layer formed film thickness be 500nm coating, remove this In addition optical film and polarizing coating have been got similarly with Comparative examples A 2.

In Comparative examples A 5, coating composition 1 is replaced using coating composition 2, it is same with Comparative examples A 4 in addition to this Optical film and polarizing coating are obtained to sample.

First, in triacetyl cellulose base material (ProductName " TD80UL M ", the Fujiphoto of 80 μm of the thickness as base material Company manufacture) single side on be coated with hard coating composition 1, formed film.Then, for being formed by film, with 0.5m/s's After 15 seconds 50 DEG C of dry airs of flow rate, further made with 30 seconds 70 DEG C of dry airs of the flow rate of 10m/s It is dried, and the evaporation of the solvent in film is thus made, and is 100mJ/cm according to accumulated light²Mode irradiate ultraviolet light to make painting Film cures, and thus forms the hard conating for being 5 μm as the film thickness of translucency functional layer.

After forming hard conating, it is coated with composition for low refractive index layer 1, forms film.Then, for being formed by film, After 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with 70 DEG C of the flow rate of 10m/s 30 seconds Dry air makes it dry, and thus makes the evaporation of the solvent in film, is 100mJ/cm according to accumulated light²Mode irradiate it is ultraviolet The low-index layer that film thickness is 110nm is consequently formed to make curing of coating in line.It has been made as a result, in triacetyl cellulose base The optical film of hard conating and low-index layer is formed on material.

Then, make optical film 2 equivalents, 55 DEG C of temperature sodium hydrate aqueous solution in impregnate 3 minutes, thus to optical film Carry out saponification process.On the other hand, polyvinyl alcohol mesentery is made to adsorb iodine, then, be uniaxially stretched makes its orientation, makes as a result, Make polarizer and ((is produced polyvinyl alcohol resin using pure water in the double spread polyethenol series bonding agent of polarizer The name of an article " PVA-117 ", the manufacture of KURARAY companies) it is diluted to the polyvinyl alcohol water solution after solid constituent 5%).

According to making a face of polarizer connect with the triacetyl cellulose base material of optical film and make polarizer The mode that another side connects with the other triacetyl cellulose base materials for 80 μm of thickness for having carried out saponification process, configuration optical film, Polarizer, triacetyl cellulose base material.In such a state, 10 minutes dry in 100 DEG C, to obtained optical film with Polarizing coating made of polarizer and triacetyl cellulose base material are bonded with polarizer with polyethenol series bonding agent.

In comparative example 7,50 μm gather to benzene of the thickness being surface-treated using non-silicone system mould release is used Naphthalate film (ProductName " TN100 ", Japan spin company's manufacture) replaces having carried out poly- pair that single side is easily bonded processing Ethylene terephthalate film has made optical film and polarizing coating in the same manner as embodiment A7 in addition to this.

In Comparative examples A 8, sandwich layer composition 1 is replaced using sandwich layer composition 2, it is same with Comparative examples A 7 in addition to this Optical film and polarizing coating are made to sample.

In Comparative examples A 9, after forming sandwich layer, the Coating composition 1 on sandwich layer forms film.Then, for It is formed by film, after 15 seconds 50 DEG C of dry airs of flow rate of 0.5m/s, further with the flow rate of 10m/s 70 DEG C of dry air makes it dry within 30 seconds, thus makes the evaporation of the solvent in film, is 100mJ/cm according to accumulated light²'s Mode irradiates ultraviolet light, to form the coating that film thickness is 500nm on sandwich layer, is got similarly in addition to this with Comparative examples A 7 Optical film and polarizing coating.

In Comparative examples A 10, coating composition 1 is replaced using coating composition 2, it is same with Comparative examples A 9 in addition to this Optical film and polarizing coating are obtained to sample.

In embodiment B1, polarizing coating has been got similarly with embodiment A1.

In embodiment B2, using composition for hard coat 2 replace composition for hard coat 1, in addition to this with embodiment B1 has got similarly polarizing coating.

In embodiment B3, using composition for hard coat 3 replace composition for hard coat 1, in addition to this with embodiment B1 has got similarly polarizing coating.

In embodiment B4, polarizing coating has been got similarly with embodiment A7.

In embodiment B5, composition for low refractive index layer 1 is replaced using composition for low refractive index layer 2, in addition to this Polarizing coating has been got similarly with embodiment B4.

In comparative example B1, polarizing coating has been got similarly with Comparative examples A 1.

In comparative example B3, using composition for hard coat 3 replace composition for hard coat 1, in addition to this with comparative example B1 has got similarly polarizing coating.

In comparative example B4, polarizing coating has been got similarly with Comparative examples A 4.

In comparative example B5, composition for low refractive index layer 1 is replaced using composition for low refractive index layer 2, in addition to this Polarizing coating has been got similarly with comparative example B4.

<Ra, Rz, Rp are calculated>

The optical film and embodiment B1~B5 and ratio obtained in 1~A10 of embodiment A1~A10 and Comparative examples A Compared with the polarizing coating obtained in example B1~B5 surface (in embodiment A1~A6, embodiment B1~B3,1~A5 of Comparative examples A and ratio Compared with the surface in example B1~B3 being hard conating, in embodiment A7~A10, embodiment B4, B5,6~A10 of Comparative examples A and compare It is the surface of low-index layer in example B4, B5), utilize atomic force microscope (ProductName " WET-9400 ", Shimadzu Seisakusho Ltd.'s system Make) surface shape is observed respectively in the case where mensuration region is 1 μm of square and 5 μm of square, according to the data of observed surface shape Ra, Rz, Rp are calculated.The definition of Ra, Rz and Rp are according to JIS B0601：2001.Specifically, first, each optical film with And in each polarizing coating, randomly selects and at least estimates not abnormal position (position of not big foreign matter or scratch etc.) at 3, 5mm square is cut into, 3 samples are respectively obtained.On the other hand, prepare the flat circle of multiple diameter 15mm and thickness 1mm Shape metallic plate pastes the carbon double faced adhesive tape of Xin EM Co., Ltd. manufacture on each metallic plate.By 1 sample according to sample Surface (surface of optical film or polarizing coating) is that the mode of upside is respectively adhered on above-mentioned adhesive tape.Then, in order to make adhesive tape with Sample is bonded securely, and the metallic plate of carry sample is placed a Dinner in drier.After placing a Dinner, by the metallic plate of carry sample It is fixed on using magnet on the measurement platform of atomic force microscope (ProductName " WET-9400 ", Shimadzu Seisakusho Ltd. manufacture), with tapping Pattern is 1 μm of square and 5 μm of square in mensuration region, utilizes atomic force microscope observation surface shape.Then, according to the observation Data, use face analysis software built-in in atomic force microscope, calculate Ra, Rz, Rp.It should be noted that when face parses Longitudinal scale be set as 20nm.Observation carries out at room temperature, using the NCHR-20 that NanoWorld companies manufacture as cantilever. In addition, when observation, 1 sample is randomly chosen at 5, surface shape is observed respectively to (totally 15 points) at 3 sample × 5. Then, for the total data of obtained 15 points, using face analysis software built-in in atomic force microscope calculate Ra, The arithmetic mean of instantaneous value of 15 points is set as Ra, Rz, Rp of each sample by Rz, Rp.

Optical film, embodiment B1 in 1~A10 of embodiment A1~A10 and Comparative examples A after obtained saponification process The surface of the polarizing coating obtained in~B5 and comparative example B1~B5 is (in embodiment A1~A6, embodiment B1~B3, Comparative examples A 1 In~A5 and comparative example B1~B3 be hard conating surface, embodiment A7~A10, embodiment B4, B5, Comparative examples A 6~ It is the surface of low-index layer in A10 and comparative example B4, B5), the contact angle as described below measured relative to water.It is specific and Speech, optical film, embodiment B1~B5 and the comparative example B1 obtained in 1~A10 of embodiment A1~A10 and Comparative examples A~ The surface of the polarizing coating obtained in B5, by after release film stripping after 24 hours, according to JIS R3257：1999 record it is quiet Drop method measures 25 DEG C using microscope type contact angle meter (ProductName " CA-QI series ", consonance surface chemistry Co., Ltd. manufacture) The contact angle relative to water on the surface of lower hard conating.It should be noted that the contact angle relative to water be set as measure 3 times and The arithmetic mean of instantaneous value of obtained value.

The back of the body of optical film after the saponification process obtained in 2~A5 of embodiment A1~A10 and Comparative examples A, A7~A10 Face (in embodiment A1~A3, A7 and Comparative examples A 2, A3, A7, A8 be sandwich layer surface, embodiment A4~A6, A8~ The surface for improving layer in A10 for cementability is the surface of coating in Comparative examples A 4, A5, A9, A10), as described below, measure phase For the contact angle of water.Specifically, at the back side of optical film, according to JIS R3257：1999 sessile drop methods recorded, using aobvious Micro mirror formula contact angle meter (ProductName " CA-QI series ", the manufacture of consonance surface chemistry Co., Ltd.) measures optical film at 25 DEG C The contact angle relative to water at the back side.It should be noted that the contact angle relative to water is set as being worth obtained from measuring for 3 times Arithmetic mean of instantaneous value.

Using atomic force microscope (ProductName " WET-9400 ", Shimadzu Seisakusho Ltd. manufacture) observation embodiment A1~A10 with And the table of the polarizing coating obtained in optical film, embodiment B1~B5 and the comparative example B1~B5 obtained in 1~A10 of Comparative examples A Face (it is the surface of hard conating in embodiment A1~A6, embodiment B1~B3,1~A5 of Comparative examples A and comparative example B1~B3, It is the table of low-index layer in embodiment A7~A10, embodiment B4, B5,6~A10 of Comparative examples A and comparative example B4, B5 Face), it is evaluated.Evaluation criterion is as described below.

○：Surface is uniform and flat.

△：A little bumps are confirmed at surface.

×：It is concave-convex apparent at surface.

The polarizing film stripping of the outmost surface of the LCD TV " KDL-40X2500 " of Sony manufacture is pasted without table The polarizing film of face coating.Then, above utilize transparent adhesion film (91% or more total light transmittance, mist degree 0.3% with Under, the product of 20~50 μm of film thickness, such as MHM series：Day Rong Jiagong companies manufacture etc.) the obtained embodiment A7 of stickup~ The optical film of 6~A10 of A10 and Comparative examples A, and so that low-index layer is outmost surface.In addition, Sony is manufactured liquid The polarizing film of the outmost surface of brilliant TV " KDL-40X2500 " is removed, using transparent adhesion film (total light transmittance 91% with Upper, 0.3% or less mist degree, the product of 20~50 μm of film thickness, such as MHM series：Day Rong Jiagong companies manufacture etc.) paste embodiment The polarizing coating of B4, B5 and comparative example B4, B5, and so that low-index layer is outmost surface.These LCD TVs are set to Illumination is the interior in the environment of about 1000Lx.Appearance when by the extinguishing of the visual observations LCD TVs, is evaluated.It comments Price card is accurate as described below.

○：The tone of picture is black, and there are a body-sensings with the framework of TV.

×：The tone of picture whitens, and the framework with TV is without a body-sensing.

The surface of the polarizing coating obtained in embodiment A1~A10 and 1~A10 of Comparative examples A is measured (in embodiment A1~A6 And in 1~A5 of Comparative examples A be hard conating surface, in 6~A10 of embodiment A7~A10 and Comparative examples A be low-refraction Layer surface) pencil hardness.Specifically, by polarizing coating under conditions of 25 DEG C of temperature, relative humidity 60% damping 2 hours Afterwards, using experiment pencil specified in JIS-S-6006, JIS K5600-5-4 are carried out on the surface of polarizing coating：It is advised in 1999 Fixed pencil hardness test (4.9N load), pencil hardness is set as by the maximum hardness of not cut.

For the polarizing coating of embodiment A4~A6, A8~A10 and Comparative examples A 4, A5, A9, A10, in order to evaluate bonding Property, carry out 180 degree disbonded test.Specifically, first, manufactured double faced adhesive tape " 751B " is made by polarizing coating using temple ridge The face of optical film side be pasted on glass plate, and polarizing coating is protruded from glass plate.It is caught from glass plate and is protruded using collet Polarizing coating, tension test is carried out with the speed of the angle of 180 degree and 300mm/ minutes, measures bonding agent and cementability at this time Improve the peel strength at the interface of layer.It will make strong obtained by averaging between path increment (tensile elongation) 100mm~200mm Degree is set as peel strength.

The optical film of 2~A5 of embodiment A1~A10 and Comparative examples A, A7~A10 are measured and drawn to evaluate toughness Stretch fracture strength.Specifically, according to JIS-K7161-1：2014, using Tensilon universal testing machines, in width 25mm, folder Between head under distance 80mm with 300mm/ minute test speeds by optics film stretching, measure when optical film is broken and be applied to optical film Stress, using the stress as tensile break strength.It should be noted that the tensile break strength of optical film is by release film It is measured in the state of after laminate stripping.Tensile break strength is set as the arithmetic mean of instantaneous value being worth obtained from measuring 3 times.

For the optical film of 3~A5 of embodiment A1~A10 and Comparative examples A, A8~A10, in 80 DEG C, relative humidity 90% In the environment of place 24 hours, carry out humidity resistance experiment, measure the front and back haze value of the humidity resistance experiment of optical film respectively (total mist degree value).Haze value is according to JIS K7136：2000 use haze meter (color technical research on ProductName " HM-150 ", village It is manufactured) it finds out.Heat-resistance test carries out in the state of carrying the laminate of release film on optical film, will when mist degree measures Release film is removed from laminate, and mist degree is measured in the state of optical film simple substance.Haze value is set as being worth obtained from measuring 3 times Arithmetic mean of instantaneous value.

Hereinafter, showing the result in 1~table of table 3.

[table 1]

[table 2]

[table 3]

For the optical film of 1~A10 of Comparative examples A, it is unsatisfactory for the 1 μm of square and 5 μm of square on the surface of optical film Region in Ra be respectively 0.5nm or more 1.5nm or less, Rz be respectively 4nm or more 20nm or less and Rp is respectively 2nm or more Therefore at least a certain item in 15nm or less does not obtain the uniform and flat optical film in surface.In contrast, for implementing For the optical film of example A1~A10, meeting the Ra in 1 μm of square on the surface of optical film and the region of 5 μm of square is respectively 0.5nm or more 1.5nm or less, Rz are respectively 4nm or more 20nm or less and Rp is respectively that 2nm or more 15nm wholes below are wanted It asks, therefore, has obtained the uniform and flat optical film in surface.

In addition, for the surface of the optical film of 1~A10 of Comparative examples A, the contact relative to water on the surface of optical film Angle is high, in addition, for the optical film of 6~A10 of Comparative examples A, the tone of picture whitens, and the framework with TV is without one Sense.In contrast, for the surface of the optical film of embodiment A1~A10, the contact relative to water on the surface of optical film Angle is small, in addition, for the optical film of embodiment A7~A10, the tone of picture is black, and there are a body-sensings with the framework of TV.

In addition, as shown in table 2, for the optical film of embodiment A4~A6, A8~A10, with Comparative examples A 4, A5, A9, The optical film of A10 is compared, and the cementability of optical film and bonding agent is good, and therefore, optical film is difficult to remove with polarizer.Thus It confirms, improves layer by forming cementability on sandwich layer, improved with the cementability of bonding agent.

In addition, for the optical film of Comparative examples A 3, A8, sandwich layer becomes really up to the mark, and therefore, tensile break strength is less than 30N/mm².In contrast, for the optical film of embodiment A4~A6, A8~A10, it is divided into sandwich layer and cementability improves layer, Therefore, sandwich layer becomes really up to the mark, tensile break strength 30N/mm²More than.It confirms, is bonded by being formed on sandwich layer as a result, Property improve layer, obtained the optical film with excellent toughness.

In addition, for the optical film of embodiment A4~A6, A8~A10, the optical film phase with embodiment A1~A3, A7 Than the haze value after humidity resistance experiment is low.It is thought that because：For the optical film of embodiment A1~A3, A7, because resistance to Humid is tested and is scattered in the ultra-violet absorber of sandwich layer and is precipitated on the surface of sandwich layer, in contrast, for embodiment A4~ For the optical film of A6, A8~A10, it is formed with cementability on sandwich layer and improves layer, therefore, improves layer using cementability and inhibit The precipitation of ultra-violet absorber.It should be noted that taking the object in the precipitation of the back side of the optical film of embodiment A1~A3, A7 Matter is analyzed using infrared measure, and the substance for confirming the precipitation is ultra-violet absorber.

As shown in table 3, the polarizing coating of comparative example B1~B5 is thick due to having the tri acetyl cellulose membrane as base material Polarizing coating of the degree more than embodiment B1~B5.Thus, it is possible to confirm, for the polarizing coating of embodiment B1~B5, it can be achieved that Slimming.

For the polarizing coating of comparative example B1~B5, it is unsatisfactory for the 1 μm of square and 5 μm of square on the surface of polarizing coating It is respectively 4nm or more 20nm or less and Rp is respectively 2nm or more that Ra, which is respectively 0.5nm or more 1.5nm or less, Rz, in region Therefore at least a certain item in 15nm or less does not obtain the uniform and flat polarizing coating in surface.In contrast, for implementing For the polarizing coating of example B1~B5, meeting the Ra in 1 μm of square on the surface of polarizing coating and the region of 5 μm of square is respectively 0.5nm or more 1.5nm or less, Rz are respectively 4nm or more 20nm or less and Rp is respectively that 2nm or more 15nm wholes below are wanted It asks, therefore, has obtained the uniform and flat polarizing coating in surface.

For the polarizing coating of comparative example B1~B5, the contact angle relative to water is high, in addition, for comparative example B4, B5 Polarizing coating for, the tone of picture whitens, with the framework of TV without a body-sensing.In contrast, for embodiment B1~B5 Polarizing coating for, the contact angle relative to water is low, in addition, for the polarizing coating of embodiment B4, B5, the tone of picture Black, there are a body-sensings with the framework of TV.

Symbol description

10,15,110,115 ... optical film

The surface 10A, 15A, 110A, 115A, 140A, 160A ...

The back side 10B, 15B, 110B, 115B ...

11,111,141,161 ... translucency functional layer

Face (surface) of 11A, 111A ...

11B, 111A ... another side (back side)

12,143 ... sandwich layers

30,35,120,125,140,160 ... polarizing coating

31,142 ... polarizers

40 ... image display devices

50 ... display panels

55 ... display elements

70 ... touch panels

112,162 ... hard conatings

113,163 ... low-index layers

Claims

1. a kind of optical film is that have translucency functional layer, the optical film without base material, wherein

One face of the translucency functional layer forms the surface of the optical film,

In 1 μm of square in one face of the translucency functional layer and the region of 5 μm of square, arithmetic average roughness (Ra) it is respectively 0.5nm or more 1.5nm hereinafter, maximum height of the profile (Rz) is respectively 4nm or more 20nm hereinafter, maximum crest height of wave It is respectively 2nm or more 15nm or less to spend (Rp).

2. optical film as described in claim 1, wherein the optical film is further equipped with lamination in the translucency functional layer The sandwich layer of another surface side.

3. optical film as claimed in claim 2, wherein the film thickness of the translucency functional layer is 2 μm or more 15 μm hereinafter, simultaneously And the film thickness of the sandwich layer is 5 μm or more 40 μm or less.

4. optical film as described in claim 1, wherein the translucency functional layer contains inorganic particle.

5. optical film as claimed in claim 4, wherein the inorganic particle is special-shaped silica dioxide granule.

6. optical film as described in claim 1, wherein the translucency functional layer is hard conating.

7. optical film as described in claim 1, wherein the translucency functional layer has hard conating and is formed in the hard painting One surface side of layer and refractive index are less than the low-index layer of the refractive index of the hard conating, and the low-index layer Surface becomes one face of the translucency functional layer.

8. optical film as claimed in claim 2, wherein the optical film is further equipped in the sandwich layer and light transmission sexual function The cementability being arranged on the face of the face opposite side of layer side improves layer.

9. optical film as claimed in claim 8, wherein the tensile break strength of the optical film is 30N/mm²More than.

10. optical film as claimed in claim 8, wherein the cementability after saponification process improves the opposite of the surface of layer In water contact angle be 80 ° or less.

11. optical film as claimed in claim 8, wherein the cementability improves layer and contains binder resin and silane coupled Agent, the binder resin include the solidfied material of ionizing ray polymerizable compound.

12. optical film as claimed in claim 11, wherein the ionizing ray polymerizable compound is multifunctional ionizing ray Polymerizable monomer.

13. a kind of polarizing coating, has：

Optical film described in claim 1 and

It is set to the polarizer with surface side opposite side of the optical film.

14. a kind of manufacturing method of polarizing coating is that have translucency functional layer and be set to the one of the translucency functional layer The manufacturing method of the polarizing coating of the polarizer of a surface side, wherein

The manufacturing method has：

It is coated with the translucency functional layer composition containing curable resin precursor on a face of release film, makes it dry, To formed the translucency functional layer composition film process；

The process for making the curing of coating to form the translucency functional layer；

In the process for being bonded polarizer with release film side opposite side of the translucency functional layer；With

The process that the release film is removed from the translucency functional layer.

15. the manufacturing method of polarizing coating as claimed in claim 14, wherein in the tool that takes a step forward for being bonded the polarizer The standby process that sandwich layer is formed on the face with the face opposite side of release film side of the translucency functional layer, the polarizer Fit in the face with the face opposite side of translucency functional layer side of the sandwich layer.

16. the manufacturing method of polarizing coating as claimed in claim 14, wherein the film thickness of the translucency functional layer be 2 μm with Upper 15 μm or less.

17. the manufacturing method of polarizing coating as claimed in claim 15, wherein the film thickness of the sandwich layer be 5 μm or more 40 μm with Under.

18. the manufacturing method of polarizing coating as claimed in claim 14, wherein the translucency functional layer composition contains ring Siloxane modified acrylate.

19. the manufacturing method of polarizing coating as claimed in claim 18, wherein the alkylene oxide modification acrylate is epoxy second At least any one in alkane modification acrylate and epoxy pronane modification acrylate.

20. the manufacturing method of polarizing coating as claimed in claim 18, wherein the translucency functional layer composition is further Contain inorganic particle.

21. the manufacturing method of polarizing coating as claimed in claim 20, wherein the inorganic particle is special-shaped silica Grain.

22. a kind of polarizing coating, for the polarizing coating of no base material, wherein

The polarizing coating has：

Translucency functional layer and

It is set to the polarizer of a surface side of the translucency functional layer.

23. polarizing coating as claimed in claim 22, wherein the polarizing coating, which is further equipped with, is set to the translucency functional layer With the sandwich layer between the polarizer.

24. polarizing coating as claimed in claim 22, wherein the translucency functional layer contains inorganic particle.

25. polarizing coating as claimed in claim 24, wherein the inorganic particle is special-shaped silica dioxide granule.

26. a kind of image display device is the image display device for having display panel, wherein

The display panel, which has display element and is configured at the right of the person of closer looking at side compared with the display element, to be wanted Seek the polarizing coating described in optical film described in 1 or claim 13 or claim 22.

27. image display device as claimed in claim 26, wherein the image display device is further equipped with and the display Panel is compared the touch panel for being configured at the person of closer looking at side and is configured between the display panel and the touch panel And by the display panel and the fixed translucency adhesive linkage of the touch panel.