CN109477928A - The optical thin film of sheet - Google Patents

The optical thin film of sheet Download PDF

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Publication number
CN109477928A
CN109477928A CN201780045224.6A CN201780045224A CN109477928A CN 109477928 A CN109477928 A CN 109477928A CN 201780045224 A CN201780045224 A CN 201780045224A CN 109477928 A CN109477928 A CN 109477928A
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CN
China
Prior art keywords
film
optical
thin film
optical thin
sheet
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Granted
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CN201780045224.6A
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Chinese (zh)
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CN109477928B (en
Inventor
上野友德
池岛健太郎
三田聪司
岸敦史
徐菁璠
宫井惠美
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Nitto Denko Corp
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Nitto Denko Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02Physical, chemical or physicochemical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02Physical, chemical or physicochemical properties
    • B32B7/023Optical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/36Layered products comprising a layer of synthetic resin comprising polyesters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02Physical, chemical or physicochemical properties
    • B32B7/022Mechanical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/06Interconnection of layers permitting easy separation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/40Properties of the layers or laminate having particular optical properties
    • B32B2307/42Polarizing, birefringent, filtering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/732Dimensional properties

Abstract

Offer when thin optical functional film is fitted in optical element even if be applied in combination volume to panel mode with piece to panel mode can be suitable for the optical thin film for manufacturing the sheet of mutually isostructural optical display panel.A kind of optical thin film of sheet (2), it is sequentially laminated with mould release film (21), adhesive phase (22), optical functional film (23), 1st surface protective film (24) and the 2nd surface protective film (25), the size relation of the peeling force of each interlayer in the optical thin film (2) of sheet are as follows: the splitting power of mould release film and adhesive phase is set as A, the splitting power of adhesive phase and optical functional film is set as B, the splitting power of optical functional film and the 1st surface protective film is set as C, when the splitting power of 1st surface protective film and the 2nd surface protective film is set as D, A < B, A < C, A<D.

Description

The optical thin film of sheet
Technical field
The present invention relates to the optical thin film of sheet, it is related to sheet used in the manufacturing equipment for example in piece to panel mode Optical thin film.
Background technique
Mould release film, adhesive phase, optical functional film (representative is polarizing film) and surface is sequentially laminated with to protect The optical thin film of shield film is configured to web-like.Just like under type: for the optical thin film released from the optical thin film of the web-like, edge Width direction retain mould release film by adhesive phase, optical functional film and surface protective film cut off (hemisect), from into Mould release film is removed on optical thin film obtained from row cutting, optical thin film is fitted in into optics member by the adhesive phase of exposing The mode (hereinafter also referred to " volume is to panel (roll to panel) mode " of part.) (for example, with reference to patent document 1 and 2).
On the other hand, the laminating type as the optical thin film different to panel mode from rolling up, just like under type: by stripping The adhesive phase exposed from mould release film the optical thin film that sheet-like state is made in advance is fitted in optical element mode (with Down also referred to as " piece is to panel (sheet to panel) mode ".) (for example, with reference to patent document 3).
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2011-123208 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2015-049115 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2006-039238 bulletin
Summary of the invention
Problems to be solved by the invention
However, newly occurring not only making using liquid crystal display panel as the manufacture of the optical display panel of representative scene The feelings with mutually isostructural optical display panel are manufactured with rolling up to panel mode but piece being applied in combination to panel mode Condition.For example, Patent Document 2 discloses: optical display panel is continuously manufactured by panel mode using volume, it is secondary to being judged as The optical display panel of product implements reprocessing processing.It is contemplated that: in the case where substandard products do not have so much, in above-mentioned reprocessing In processing when being bonded new optical functional film on optical element, piece will use to panel mode.In addition, it is also conceivable that: example Such as when that there must be mutually isostructural optical display panel with short time mass production, panel mode can not be provided by volume Piece can be applied in combination to panel mode in whole supply amounts.
In recent years, it as the slimming of optical display panel is in progress, using polarizing film as representative, is developing than in the past more Thin optical functional film (for example, 60 μm of polarizing films below of thickness).Rigidity (the elasticity of optical functional film thin in this way Modulus) it is low, it is easy to happen torsion, curling etc..
According to volume to panel mode, it is defeated that thin optical functional film is laminated in the state of carrier thin film (mould release film) It send to bonding position, optical functional film is removed from carrier thin film (mould release film) in the bonding position, by optical functional film Optical element is fitted in, therefore is able to suppress torsion, curling etc. and occurred, and thin optical functional film is continuously fitted in into light Learn element.But in piece in panel mode, the conveying of the optical functional film of piece state, the removing of mould release film, optics function Energy film is difficult to the processing such as laminating process of liquid crystal cells, worries that generation is bonded bad, yield rate and reduces.
Even if the object of the present invention is to provide volume is applied in combination when thin optical functional film is fitted in optical element It also can suitably manufacture the optically thin of the sheet of mutually isostructural optical display panel to panel mode with piece to panel mode Film.
The solution to the problem
The present invention is a kind of optical thin film of sheet, and it is thin to be sequentially laminated with mould release film, adhesive phase, optical function Film, the 1st surface protective film and the 2nd surface protective film,
The size relation of the peeling force of each interlayer in the optical thin film of sheet are as follows:
By the splitting power of mould release film and adhesive phase be set as A,
The splitting power of adhesive phase and optical functional film be set as B,
The splitting power of optical functional film and the 1st surface protective film be set as C,
When the splitting power of 1st surface protective film and the 2nd surface protective film is set as D,
A<B、A<C、A<D。
In foregoing invention, the size relation of aforementioned peeling force is preferably A < D < C≤B or A < D < B≤C, more preferably A < D < C <B。
In foregoing invention, aforementioned optical function film can be polarizing film.
In foregoing invention, the thickness of aforementioned polarizing film can be 60 μm or less.
In foregoing invention, aforementioned polarizing film can be for the structure with a thickness of 10 μm of polarisation parts below.
In foregoing invention, aforementioned 1st surface protective film can be with the 1st base film and the 1st adhesive phase and to press from both sides The 1st adhesive phase be laminated in the structure of aforementioned optical function film.
In foregoing invention, aforementioned 1st surface protective film can be the film of autoadhesion type.
In foregoing invention, aforementioned 2nd surface protective film can be with the 2nd base film and the 2nd adhesive phase and to press from both sides The 2nd adhesive phase be laminated in the structure of aforementioned 1st surface protective film.
In foregoing invention, aforementioned 2nd surface protective film can be the film of autoadhesion type.
The effect of invention
The optical thin film of sheet of the invention is in piece to using in panel mode.It is provided with the piece of the 2nd surface protective film The treatability of the optical thin film of shape is improved, therefore can inhibit the generations such as torsion, curling, and be able to use piece to panel side Formula suitably fits in optical element.Moreover, by the optical thin film from the sheet for fitting in optical display panel by the 2nd surface Protective film removal (such as removing) as a result can manufacture identical with by rolling up the optical display panel manufactured to panel mode The optical display panel of stepped construction.That is, the optical thin film of sheet according to the present invention, is fitting in optics member for optical thin film When part, though be applied in combination volume to panel mode and piece to panel mode in the case where, also can suitably manufacture identical knot The optical display panel of structure.
Detailed description of the invention
Fig. 1 is the schematic diagram for showing the optical pellicle of embodiment 1.
Fig. 2 is schematic diagram of the volume to the manufacture system of panel mode.
Fig. 3 is schematic diagram of the piece to the manufacture system of panel mode.
Specific embodiment
<optical thin film of sheet>
Firstly, the component of the optical thin film of optical thin film and web-like to sheet used in the present invention is illustrated.Fig. 1 For the schematic diagram for showing the optical thin film of sheet and the optical thin film of web-like.The top Fig. 1 shows the 1st optical thin film 1 of web-like Face and local enlarged section are overlooked in side.The lower part of Fig. 1 shows the side of the 1st optical thin film 2 of sheet, overlooks face drawn game Portion's enlarged section.1st optical thin film 1 of web-like is sequentially laminated with the 1st mould release film 11, the 1st adhesive phase 12, the 1st optics Function film 13 and the 1st surface protective film 14.
1st optical thin film 1 of web-like is used to manufacture optical display panel in such a way that volume is to panel.In these cases, The 1st band-like optical thin film 10 release from the 1st optical thin film 1 of web-like, width a is cut off unit C, and b is protected at predetermined intervals 11 ground of the first mould release film is stayed to cut off.Symbol s is the notch formed on the 1st optical thin film 10 by above-mentioned cutting.
In addition, the 1st optical thin film 2 of sheet is sequentially laminated with the 1st mould release film 21, the 1st adhesive phase 22, the 1st optics Function film 23, the 1st surface protective film 24 and the 2nd surface protective film 25.The size of 1st optical thin film 2 of sheet is length A, width b.1st optical thin film 2 of sheet is used to manufacture optical display panel in such a way that piece is to panel.
In the present embodiment, the 1st mould release film 11 is identical composition with the 1st mould release film 21.1st adhesive phase 12 with 1st adhesive phase 22 is identical composition.1st optical functional film 13 is identical composition with the 1st optical functional film 23.1st table Face protective film 14 is identical composition with the 1st surface protective film 24 with the 2nd surface protective film 25." identical composition " is not only It is that material, thickness etc. are completely the same, as long as substantially the same (for example, identical in manufacture quality).
In the present embodiment, the 1st surface protective film 14 (or 24) has the 1st base film and the 1st adhesive phase, folder The 1st adhesive phase be laminated in the 1st optical functional film 13 (or 23).It should be noted that as other embodiment, the 1 surface protective film 14 (or 24) can be the film of self-adhesion mould assembly.
In the present embodiment, the 2nd surface protective film 25 has the 2nd base film and the 2nd adhesive phase, clip this 2 adhesive phases are laminated in the 1st surface protective film 24.It should be noted that the 2nd surface protection is thin as other embodiment Film 25 can be the film of self-adhesion mould assembly.
(relationship of splitting power)
In addition, being greater than the 2nd surface in the peeling force of the 1st surface protective film 24 and the interlayer of the 1st optical functional film 23 The structure of the peeling force of the interlayer of protective film 25 and the 1st surface protective film 24.According to this structure, it can more successfully remove 2nd surface protective film 25.As the measurement of peeling force, cupping machine can be used for example.As stripping conditions, with 180 ° of removings in 0.3m/ minutes are measured.Peeling force is controlled by composition, thickness of adhesive etc..
The size relation of the peeling force of each interlayer in 1st optical thin film 2 of sheet is as follows.
By the splitting power of the 1st mould release film 21 and the 1st adhesive phase 22 be set as A,
The splitting power of 1st adhesive phase 22 and the 1st optical functional film 23 be set as B,
The splitting power of 1st optical functional film 23 and the 1st surface protective film 24 be set as C,
When the splitting power of 1st surface protective film 24 and the 2nd surface protective film 25 is set as D,
A<B、A<C、A<D。
Preferably A < D < C≤B or A < D < B≤C.
More preferably A < D < C < B.
According to the relationship of above-mentioned splitting power, it is able to suppress the 2nd surface protective film when removing 1 mould release film It is stripped.
<optical functional film>
1st optical functional film 13,23 is not particularly limited as long as the film with optical function, can enumerate: Polarizing film, phase-contrast film, bright enhancement film, diffusion film etc., representative is polarizing film.
(polarizing film)
In the present embodiment, it is preferable to use thickness (overall thickness) is 60 μm below inclined from the viewpoint of slimming Optical thin film, more preferably 55 μm or less, further preferably 50 μm or less.It as polarizing film, such as can enumerate: (1) exist The two sides of polarisation part are laminated with protective film (sometimes referred to as " polarisation part protective film ".) structure (sometimes referred to as " two protections are inclined Optical thin film ".);(2) structure (sometimes referred to as " single protection polarizing film " of protective film only is laminated in the unilateral side of polarisation part.) Deng.
(polarisation part)
Polarisation part, which can be used, utilizes polarisation part made of polyvinyl alcohol resin.It as polarisation part, such as can enumerate: make Iodine, dichroic dye dichroic substance be adsorbed to polyvinyl alcohol film, part formolation polyvinyl alcohol film, ethylene- Vinyl acetate copolymer pastern divides the hydrophilic macromolecules such as saponified film film and carries out polarisation part made of simple tension, gathers The polyenoid system such as dehydration treatment, dehydrochlorinated products of polyvinyl chloride of vinyl alcohol oriented film etc..It include poly- second in these The polarisation part of the dichroic substances such as enol system film and iodine is suitable.
Polyvinyl alcohol film is dyed with iodine and carry out polarisation part made of simple tension for example and can pass through by Polyvinyl alcohol film is impregnated in the aqueous solution of iodine to be dyed, and is stretched to 3~7 times of raw footage to make.As needed It can also can also be impregnated in the aqueous solution of potassium iodide etc. comprising boric acid, zinc sulfate, zinc chloride etc..And then as needed also Polyvinyl alcohol film can be impregnated in water to wash before dyeing.By carrying out water to polyvinyl alcohol film It washes, so as to clean pollutant, the anti-blocking agent on polyvinyl alcohol film surface, furthermore by keeping polyvinyl alcohol film molten Swollen, also having prevents from dyeing unequal non-uniform effect.Stretching can be carried out after with iodine staining, can also with Edge Coloring side into Row stretches, and in addition can also be dyed after the stretch with iodine.Can also in the aqueous solution of boric acid, potassium iodide etc., water-bath into Row stretches.
From the viewpoint of slimming, the thickness of polarisation part is preferably 10 μm or less, further preferably 8 μm or less, into One step is preferably 7 μm or less, further preferably 6 μm or less.On the other hand, the thickness of polarisation part is preferably 2 μm or more, into one Preferably 3 μm or more of step.The uneven thickness of such slim polarisation part is few, visual excellence, and in addition change in size is small, therefore To the excellent in te pins of durability of thermal shock.On the other hand, for the polarizing film comprising 10 μm of thickness polarisation parts below, due to film Rigidity (elasticity modulus) be significantly lower, therefore in piece to high a possibility that in panel mode, twisting, crimp etc..Therefore, Instant invention is especially suited for the polarizing films.
As slim polarisation part, can typically enumerate:
No. 4751486 specifications of Japanese Patent No.,
No. 4751481 specifications of Japanese Patent No.,
No. 4815544 specifications of Japanese Patent No.,
No. 5048120 specifications of Japanese Patent No.,
No. 2014/077599 pamphlet of International Publication No.,
No. 2014/077636 pamphlet of International Publication No.
The slim polarisation part that the slim polarisation part or the manufacturing method by recording in these documents recorded in obtain.
The polarisation part preferably meets following formula with optical characteristics represented by singleton transmittance T and degree of polarization P
P>-(100.929T-42.4- 1) × 100 (wherein, T < 42.3) or
P >=99.9 (wherein, T >=42.3)
The mode of condition constitute.The polarisation part constituted in a manner of meeting aforementioned condition unambiguously has as making Performance required by display with the liquid crystal display television of large-scale display element.Specifically contrast 1000:1 or more and most Big brightness 500cd/m2More than.As other purposes, such as the visible side of organic EL units can be fitted in.
As aforementioned slim polarisation part, in the process stretched comprising the state with laminated body and the process dyed Preparation method in, especially from can be stretched to high magnification and can be improved polarizing properties aspect, preferably by such as Japanese No. 4751481 No. 4751486 specification of patent, Japanese Patent No. specifications are remembered in No. 4815544 specifications of Japan Patent It include polarisation part obtained from the preparation method of the process stretched in boric acid aqueous solution as load, particularly preferably using such as special In No. 4815544 sharp No. 4751481 specification, patent specifications it is recorded it is such be included in boric acid aqueous solution drawn Polarisation part obtained from the preparation method of the process secondarily stretched in the air before stretching.These slim polarisation parts can be by including Polyvinyl alcohol resin (hereinafter also referred to PVA system resin) layer and stretching are drawn with resin base material in the state of laminated body The preparation method of the process stretched and the process dyed and obtain.When for the preparation method, even if PVA resin is thin, can also it pass through It is stretched with resin base material support without being stretched a problem that fracture caused by stretching.
(protective film (polarisation part protective film))
As constitute protective film material, preferably clear, mechanical strength, thermal stability, moisture barrier property, respectively to same The excellent materials such as property.Such as can enumerate: the Polyesters such as polyethylene terephthalate, polyethylene naphthalate are poly- Close the acrylic polymerics such as cellulose-based polymer, the polymethyl methacrylates such as object, cellulose diacetate, cellulose triacetate Styrenics, the polycarbonate based polymers such as object, polystyrene, acrylonitritrile-styrene resin (AS resin) etc..Separately Outside, the example as the polymer for forming above-mentioned protective film, can also enumerate: polyethylene, polypropylene have ring system or drop ice Polyolefin polymer, vinyl chloride-based polymer, nylon, fragrance as the polyolefin of piece alkene structure, ethylene-propylene copolymer The amides such as polyamide based polymer, imide series polymer, sulfone based polymer, polyether sulfone based polymer, polyether-ether-ketone system are poly- Close object, polyphenylene sulfide based polymer, vinyl alcohol system polymer, vinylidene chloride based polymer, vinyl butyral based polymer, virtue Ester based polymer, polyformaldehyde based polymer, epoxy based polymer or blend of above-mentioned polymer etc..
It should be noted that may include a kind of any of the above additive appropriate in protective film.As additive, example Can such as enumerate: ultraviolet absorbing agent, antioxidant, lubricant, plasticizer, release agent, anti-coloring agent, fire retardant, nucleating agent, Antistatic agent, pigment, colorant etc..The content of above-mentioned thermoplastic resin in transparent protective film be preferably 50 weight %~ It 100 weight %, more preferably 50 weight of weight %~99 %, is more preferably 60 weight of weight %~98 %, particularly preferred For 70 weight of weight %~97 %.When the content of above-mentioned thermoplastic resin in transparent protective film is less than 50 weight %, whether there is or not Method sufficiently shows the worry of high transparency that thermoplastic resin has originally etc..
As aforementioned protective film, phase-contrast film, bright enhancement film, diffusion film etc. can also be used.
Hard conating, anti-reflection layer, adherent layer, diffusion layer can be set in the face for not being bonded polarisation part of aforementioned protective film Or the functional layers such as antiglare layer.It should be noted that the functions such as above-mentioned hard conating, anti-reflection layer, adherent layer, diffusion layer, antiglare layer Layer is also used as the component different from transparent protective film separately in addition to can be set other than transparent protective film is on itself Setting.
(holding sheet)
Aforementioned protective film and polarisation part can clip the clampings such as adhesive layer, adhesive phase, priming coat (prime coat) clamping Layer is laminated.At this time, it is generally desirable to the two is laminated in a manner of no the air gap holding sheet.
Adhesive layer is formed by bonding agent.The type of bonding agent is not particularly limited, various bonding agents can be used.Before Adhesive layer is stated to be not particularly limited as long as optically transparent, as bonding agent, can be used water system, solvent system, hot melt system, The bonding agent of the various forms such as active energy ray curable, but water system bonding agent or active energy ray curable bonding agent are Suitable.
As water system bonding agent, can be exemplified out: isocyanates system bonding agent, polyethenol series bonding agent, gelatin system are viscous Connect agent, ethylene base system latex system, water system polyester etc..Water system bonding agent can usually be made in the form of the bonding agent comprising aqueous solution With usually containing the solid component of 0.5 weight of weight %~60 %.
Active energy ray curable bonding agent is by electron ray, ultraviolet light (radical-curable, cationic curing Type) the cured bonding agent of isoreactivity energy-ray progress, for example, can be with electron beam curing type, the shape of ultraviolet hardening Formula uses.Optical free radical curing type bonding agent can be used for example in active energy ray curable bonding agent.Use optical free radical When the active energy ray curable bonding agent of curing type is as ultraviolet hardening, which contains free-radical polymerisedization Close object and Photoepolymerizationinitiater initiater.
It should be noted that in layered polarization part and protective film, it can between transparent protective film and adhesive layer Adhesive layer is arranged.Adhesive layer for example can be by with polyester backbone, polyether skeleton, polycarbonate backbone, polyurethane bone The various resins of frame, organic silicon-type, polyamide backbone, polyimide backbone, polyvinyl alcohol skeleton etc. are formed.These polymer trees Rouge can be used alone, or two or more is applied in combination.In addition, other additions can also be added in the formation of adhesive layer Agent.Specifically, the stabilizers such as tackifier, ultraviolet absorbing agent, antioxidant, heat-resisting stabilizing agent can also be further used Deng.
Adhesive phase is formed by adhesive.As adhesive, various adhesives can be used, such as can enumerate: rubber It is adhesive, acrylic adhesive, organic silicon-type adhesive, carbamate system adhesive, the bonding of vinyl alkyl ethers system Agent, polyvinylpyrrolidone system adhesive, Polyacrylamide adhesive, cellulose-based adhesive etc..According to aforementioned adhesion agent Type select the base polymer of adhesiveness.It is excellent from optical transparence, show suitable profit in aforementioned adhesion agent , it is preferable to use acrylic acid series from the perspective of the adhesion characteristic of moist, cohesion and cementability, weatherability, heat resistance etc. are excellent Adhesive.
Priming coat (prime coat) is formed to improve the adaptation of polarisation part and protective film.As composition priming paint The material of layer, as long as playing both base film and polyvinyl alcohol resin layer the material of a degree of strong closing force Material is just not particularly limited.Such as the excellent thermoplastic resins etc. such as the transparency, thermal stability, draftability can be used.As heat Plastic resin, such as can enumerate: acrylic resin, polyolefin-based resins, polyester based resin, polyvinyl alcohol resin or Their mixture.
(surface protective film)
1st, the 2nd surface protective film be set in optical thin film polarizing film single side (non-laminate adhesive oxidant layer Face), the optical functional films such as protection polarizing film.
Tool may be selected from the viewpoints such as inspectability, managerial as the 1st, base film of the 2nd surface protective film There is the thin-film material of isotropism or near-isotropic.It as the thin-film material, such as can enumerate: poly terephthalic acid second The polyester based resins such as terephthalate films, cellulose-based resin, acetic acid esters system resin, polyether sulfone system resin, polycarbonate-based resin, The transparent polymer of polyamide resin, polyimides system resins, polyolefin-based resins, acrylic resin etc.These Preferred polyester based resin in the middle.Base film can also be used in the form of the layered product of one kind or two or more thin-film material, In addition it can use the stretching thing of aforementioned film.The thickness of base film is preferably 10 μm~150 μm or less, further preferably It is 20 μm~100 μm.
1st, the 2nd surface protective film can use aforementioned substrates film in the form of the film of self-adhering-type, additionally may be used To use the film with aforementioned substrates film and adhesive phase.Go out from the viewpoint of the optical functional films such as protection polarizing film Hair, the 1st, it is preferable to use the films with adhesive phase for the 2nd surface protective film.
Adhesive phase used in stacking as the 1st, the 2nd surface protective film, such as can be suitable for selecting and using It is poly- with (methyl) acrylic acid series polymeric compounds, organic silicon-type polymer, polyester, polyurethane, polyamide, polyethers, fluorine system, rubber series etc. Close adhesive of the object as basic polymer.From the viewpoint of the transparency, weatherability, heat resistance etc., preferably with acrylic acid series Acrylic adhesive of the polymer as basic polymer.The thickness (dry film thickness) of adhesive phase is according to required bonding force To determine.Usually 1 μm~100 μm or so, preferably 5 μm~50 μm.
It should be noted that the 1st, the 2nd surface protective film can be handled by organosilicon, chain alkyl is handled, at fluorine Lift-off processing layer is arranged in opposing face of the low cementitious materials such as reason in the face for being provided with adhesive phase.
<adhesive phase>
Suitable adhesive can be used in the formation of adhesive phase 12,22, to the kind thereof is not particularly limited.As bonding Agent can enumerate: elastomeric adhesive, acrylic adhesive, organic silicon-type adhesive, carbamate system adhesive, second Alkenyl alkyl ethers system adhesive, polyethenol series adhesive, polyvinylpyrrolidone system adhesive, Polyacrylamide bonding Agent, cellulose-based adhesive etc..
, it is preferable to use optical transparence is excellent, shows suitable wetability, cohesion and bonding in these adhesives The excellent adhesives such as adhesion characteristic, weatherability, the heat resistance of property.As the adhesive for showing such feature, preferably Use acrylic adhesive.
It as the method for forming adhesive phase 12,22, such as can be made using following method: aforementioned adhesion agent is coated with It is dry to remove polymer solvent etc. and form adhesive phase in the mould release film (isolation film) etc. being release-treated, it is transferred to later The method of polarisation part (or transparent protective film);Or it is coated with described adhesive on polarisation part (or transparent protective film), it is dry It removes polymer solvent etc. and forms the method etc. of adhesive phase on polarisation part.It should be noted that in coating adhesive, also It can be suitable for new more than one the solvent being added other than polymer solvent.
As the mould release film being release-treated, organosilicon release liner is preferably used.It is coated on such liner Adhesive of the invention simultaneously makes it dry and is formed in the process of adhesive phase, as the method for keeping adhesive dry, Ke Yigen According to purpose using suitable, method appropriate.It is preferable to use the methods being thermally dried to above-mentioned film.Heat drying temperature is excellent It is selected as 40 DEG C~200 DEG C, further preferably 50 DEG C~180 DEG C, particularly preferably 70 DEG C~170 DEG C.By by heating temperature It is set as above range, so as to obtain the adhesive for the adhesion characteristic for having excellent.
Drying time can be using suitable, reasonable time.Above-mentioned drying time is preferably 5 seconds~20 minutes, further Preferably 5 seconds~10 minutes, particularly preferably 10 seconds~5 minutes.
As the forming method of the 1st adhesive phase 12,22, various methods can be used.Specifically, can for example enumerate: Roller coating, roller lick coating, intaglio plate coating, coating, roller are reversed to brush cloth, spraying, dipping roller coating, stick painting, blade coating, air knife painting Cloth, lip coating, utilizes the methods of extrusion coating methods of die coating machine etc. at curtain coating.
The thickness of 1st adhesive phase 12,22 is not particularly limited, for example, 1 μm~100 μm or so.Preferably 2 μm~ 50 μm, more preferably 2 μm~40 μm, further preferably 5 μm~35 μm.
<mould release film>
1st mould release film 11,21 is until for protecting adhesive phase until practical.As the constituent material of mould release film, Such as it can enumerate: the plastic films such as polyethylene, polypropylene, polyethylene terephthalate, polyester film, paper, cloth, nothing The suitable sheet etc. such as the porous materials such as woven fabric, net, foamed sheet, metal foil and their layered product, it is excellent from surface smoothness It is suitable for using plastic film from the perspective of different.
It as the plastic film, is not particularly limited as long as the film that can protect described adhesive layer, such as can It enumerates: polyethylene film, polypropylene film, polybutene film, polybutadiene membrane, poly-methyl pentene film, polyvinyl chloride Film, vinyl chloride copolymer film, pet film, polybutylene terephthalate (PBT) film, poly- ammonia Ester film, vinyl-vinyl acetate copolymer film etc..
The thickness of 1st mould release film 11,21 is usually 5 μm~200 μm, preferably 5 μm~100 μm or so.As needed Release agent, the dioxy using organic silicon-type, fluorine system, chain alkyl system or fatty acid acyl amine system can also be carried out to the isolation film The antistatic treatment of the demoulding of SiClx powder etc. and antifouling process, application type, mixed milling type, vapor deposition type etc..In particular, by described The surface suitable of mould release film carries out the lift-off processings such as organosilicon processing, chain alkyl processing, fluorine processing, can further increase From the fissility of described adhesive layer.
(liquid crystal cells, liquid crystal display panel)
Liquid crystal cells be relative configuration a pair of of substrate (the 1st substrate (visible surface) Pa, the 2nd substrate (back side) Pb) it Between structure made of sealing fluid crystal layer.Any type of liquid crystal cells can be used in liquid crystal cells, but in order to realize high contrast, It is preferable to use the liquid crystal cells of vertically oriented (VA) mode, plane conversion (IPS) mode.Liquid crystal display panel is in liquid crystal cells One or two sides fitting polarizing film made of, be assembled with driving circuit as needed.
(organic EL units, organic EL display panel)
Organic EL units are that structure made of electroluminescence layer is clamped between a pair of electrodes.Organic EL units can for example make With top light emitting (Top Emission) mode, bottom-emission (Bottom Emission) mode and the double-deck luminous (Double Emission) any type of organic EL units such as mode.Organic EL display panel is the one or two sides in organic EL units It is bonded made of polarizing film, is assembled with driving circuit as needed.
(rolling up the manufacture system to panel mode)
Fig. 2 shows the volumes for the 1st optical thin film 1 for having used web-like to the manufacture system of the optical display panel of panel mode System.In present embodiment, liquid crystal cells are enumerated as optical element and are illustrated as an example, as optical display panel column Liquid crystal display panel is enumerated to be illustrated as an example.
It is thin that 1st optical thin film 1 of web-like is sequentially laminated with the 1st mould release film 11, the 1st adhesive phase 12, the 1st optical function Film 13 and the 1st surface protective film 14.As shown in Figure 1,1 width of the 1st optical thin film of web-like is a, has corresponding to liquid crystal surface The width (being essentially the width shorter than the long side of liquid crystal cells P) of the long side of plate.
As shown in Fig. 2, the manufacture system of the liquid crystal display panel of present embodiment, which is included, is delivered to the 1st for liquid crystal cells P 1st delivery section 81 in attaching portion 64, to use the 1st optical thin film 1 of web-like liquid crystal cells P the 1st face P1 attach it is optically thin The 2nd delivery section 82 that liquid crystal cells P after film is conveyed.Each delivery section has for by along orthogonal with conveying direction The parallel rotary shaft in direction pivots about to be constituted to convey multiple conveying roller R of liquid crystal cells P.It needs to illustrate It is can also have adsorption plate etc. other than conveying roller and constitute.
(liquid crystal cells conveying operation)
From the incorporating section 91 of storage liquid crystal cells P, liquid crystal cells P is configured in the way of top surface by the 1st face P1 to the 1st defeated Portion 81 is sent, and is conveyed by the rotation of conveying roller R to the 1st attaching portion 64.
(the 1st optical thin film releases process, the 1st optical thin film cut off operation)
The 1st mould release film 11 is fixed in band-like 10 side of the 1st optical thin film absorption released from the 1st optical thin film 1 of web-like Side cutting portion 61 in a manner of retaining the 1st mould release film 11 with not cutting off by band-like adhesive phase 12, the band-like the 1st Optical functional film 13, the 1st band-like surface protective film 14 cut into prescribed level (short side corresponding to liquid crystal cells P Length (being essentially the length shorter than short side)), form notch s.The cutting carried out by cutting portion 61 can for example enumerate Using the cutting (utilizing the cutting for cutting saw blade tool) of cutter, utilize the cutting of laser aid.After indicating cutting with the arrow of Fig. 2 An example of notch s, but in order to be easy explanation and enlarged depiction notch.Niproll (not shown) can be disposed on and cut The structure of 1st optical thin film 10 of the upstream side or downstream side in disconnected portion 61 for conveying band.It should be noted that niproll It can be only fitted to the upstream side and downstream side of cutting portion 61.
(tension adjustment process)
In order to make processing for a long time not in the attaching of the cutoff process of the 1st band-like optical thin film 10 and back segment processing It is interruptedly carried out continuously and handles and be provided with the 1st tension adjustment portion 62 to adjust the slackness of film.1st tension tune Section portion 62 is for example constituted with the trip gear using hammer.Niproll (not shown) can be disposed on the 1st tension adjustment portion 62 upstream side or downstream side are used to convey the structure of the 1st optical thin film 10.It should be noted that niproll also can be only fitted to The upstream side and downstream side in the 1st tension adjustment portion 62.
(stripping process)
1st optical thin film 10 is wound overturning in the 1st stripping portion 63, and the 1st optical thin film is removed from the 1st mould release film 11 10.1st mould release film 11 is batched in rolls by the 1st reeling end 65.1st reeling end 65 has roller and rotary driving part, rotation driving 1st mould release film 11 is wound into a roll by portion and rotation by making roller.In addition, niproll (not shown) can be disposed on stripping portion 63 upstream side or downstream side are used to convey the structure of the 1st optical thin film 10 or the 1st mould release film 11.It should be noted that folder It holds roller also and can be only fitted to the upstream side and downstream side of stripping portion 63.
(the 1st attached process)
It is glued on the 1st face P1 of liquid crystal cells P when conveying liquid crystal cells P by the 1st adhesive phase 12 in 1st attaching portion 64 Patch has removed the 1st optical thin film 10 of the 1st mould release film 11.1st attaching portion 64 is made of a pair the 1st roller 64a and the 2nd roller 64b. It can be that any one is driven roller and another one is driven voller, being also possible to two rollers is driven roller.While by the 1st roller 64a of a pair, 2 roller 64b clamp the 1st optical thin film 10 and the side liquid crystal cells P and they are delivered to downstream, thus attach the 1st optical thin film 10 In the 1st face P1 of liquid crystal cells P.Liquid crystal cells P after the 1st face P1 of liquid crystal cells P attaches the 1st optical thin film 10 of sheet Downstream is transported to by the 2nd delivery section 82.
(manufacture system of the piece to panel mode)
Fig. 3, which is shown, has used the piece of the 1st optical thin film 2 of sheet to the manufacture system of the optical display panel of panel mode System.In present embodiment, liquid crystal cells are enumerated as optical element and are illustrated as an example, as optical display panel act Liquid crystal display panel is illustrated as an example out.
It is thin that 1st optical thin film 2 of sheet is sequentially laminated with the 1st mould release film 21, the 1st adhesive phase 22, the 1st optical function Film 23, the 1st surface protective film 24 and the 2nd surface protective film 25.As shown in Figure 1, the 1st optical thin film 2 of sheet be long a, Wide b has the width (being essentially the width shorter than the long side of liquid crystal cells P) of the long side corresponding to liquid crystal display panel.
As shown in figure 3, the manufacture system of the liquid crystal display panel of present embodiment, which is included, is delivered to piece for liquid crystal cells P 3rd delivery section 181 of label apparatus 164 (being equivalent to the 2nd attaching portion), to use the 1st optical thin film 2 of sheet in liquid crystal cells P The 1st face P1 optical film adhered after the 4th delivery section 182 that is conveyed of liquid crystal cells P.Each delivery section has for passing through It conveys multiple conveyings of liquid crystal cells P to be pivoted about along the rotary shaft parallel with the orthogonal direction of conveying direction and uses Roller R and constitute.It should be noted that can also have adsorption plate etc. other than conveying roller and constitute.
(liquid crystal cells conveying operation)
From the incorporating section 191 of storage liquid crystal cells P, liquid crystal cells P is configured in the way of top surface by the 1st face P1 to the 3 delivery sections 181, and conveyed by the rotation direction turning piece label apparatus 164 of conveying roller R.
From the container 100 for the 1st optical thin film 2 for containing sheet, pass through the adsorption section 164a suction sheet of piece label apparatus 164 1st optical thin film 2 of shape is simultaneously supplied to bonding position.It is using stripping unit that the 1st mould release film 21 is optically thin from the 1st of sheet Film 2 is removed.The adsorption plane of adsorption section 164a is section arc-shaped.Stripping unit is for example pasted adhesive tape by using adhesive tape Keep adhesive tape mobile together in 21 face of the 1st mould release film and by mobile mechanism to remove the 1st mould release film 21.
The 1st face side P1 that there is piece label apparatus 164 stationary plane 164b, stationary plane 164b to adsorb fixed liquid crystal cells P.With rolling The mode of dynamic adsorption section 164a will remove the 1st mould release film 21 and expose the 1st light of the sheet of the state of the 1st adhesive phase 22 Learn the 1st face P1 that film 2 is attached at liquid crystal cells P.
(the 2nd surface protective film stripping process)
After the 1st optical thin film 2 for attaching sheet, the 2nd surface protective film 25 is removed.Lift-off processing can be with manual behaviour It carries out, can also be carried out with stripping off device.
In manufacture system (Fig. 2) of the above-mentioned volume to panel mode, to the one sides (the 1st face P1) of liquid crystal cells to roll up opposite Plate mode has attached optical thin film, but is not limited to this.Can also another side (the 2nd face P2) to liquid crystal cells to roll up to panel Mode or piece are to panel mode optical film adhered.
In manufacture system (Fig. 3) of the sheet above to panel mode, to the one sides (the 1st face P1) of liquid crystal cells with piece opposite Plate mode has attached optical thin film, but is not limited to this.Can also another side (the 2nd face P2) to liquid crystal cells to roll up to panel Mode or piece are to panel mode optical film adhered.
Above-mentioned volume to panel mode and piece in the manufacture system of panel mode, by optical thin film be attached at any surface or Behind two sides, it can be optically inspected.It, can be from liquid crystal according to the result (such as in the case where being determined as substandard products) of optical check Unit (optical element) removes optical thin film, attaches optical element again with the 2nd panel manufacturing department (piece is to panel mode) come again It manufactures liquid crystal display panel (optical display panel).
(variation)
In the present embodiment, it uses by optical pellicle as the optical thin film of the optical thin film of web-like and sheet It is illustrated in the case where method for continuous production of liquid crystal display panel, however, not limited to this, it is aobvious to can be used for organic EL Show the method for continuous production of panel.
In embodiment, as the optical thin film of web-like, above-mentioned optical thin film, but the knot of the optical thin film of web-like have been used Structure is not limited to this.For example, can also use other than mould release film and be formed with the band-like of multiple cut line in the width direction Optical thin film winding made of film (optical thin film for having joint-cutting).
In embodiment, cutting (hemisect) band-like optical thin film at predetermined intervals in the width direction, but from improve at From the perspective of product rate, (jump is cut) band can be cut off in the width direction in a manner of avoiding the defect part of band-like optical thin film The optical thin film of shape, can also be with the size smaller than specified interval (size of optical element) (more preferably with as small as possible big It is small) optical thin film of the cutting comprising defect part.
In embodiment, enumerates and be illustrated for the liquid crystal cells and liquid crystal display panel of rectangular rectangle, but liquid The shape of brilliant unit and liquid crystal display panel as long as with opposite one group while and it is another group opposite while shape as long as do not have It is particularly limited to.
Description of symbols
The optical thin film of 1 web-like
11 mould release films
12 adhesive phases
13 optical functional films
14 the 1st surface protective films
The optical thin film of 2 sheets
21 mould release films
22 adhesive phases
23 optical functional films
24 the 1st surface protective films
25 the 2nd surface protective films

Claims (10)

1. a kind of optical thin film of sheet is sequentially laminated with mould release film, adhesive phase, optical functional film, the 1st surface guarantor Film and the 2nd surface protective film are protected,
The size relation of the peeling force of each interlayer in the optical thin film of sheet are as follows:
By the splitting power of mould release film and adhesive phase be set as A,
The splitting power of adhesive phase and optical functional film be set as B,
The splitting power of optical functional film and the 1st surface protective film be set as C,
When the splitting power of 1st surface protective film and the 2nd surface protective film is set as D,
A<B、A<C、A<D。
2. the optical thin film of sheet according to claim 1, wherein the size relation of the peeling force are as follows:
A < D < C≤B or A < D < B≤C.
3. the optical thin film of sheet according to claim 2, wherein the size relation of the peeling force are as follows:
A<D<C<B。
4. the optical thin film of sheet described according to claim 1~any one of 3, which is characterized in that the optical function Film is polarizing film.
5. the optical thin film of sheet according to claim 4, which is characterized in that the polarizing film with a thickness of 60 μm with Under.
6. the optical thin film of sheet according to claim 4 or 5, which is characterized in that the polarizing film have with a thickness of 10 μm of polarisation parts below.
7. the optical thin film of sheet described according to claim 1~any one of 6, which is characterized in that the 1st surface is protected Protecting film has the 1st base film and the 1st adhesive phase, and clips the 1st adhesive phase and be laminated in the optical functional film.
8. the optical thin film of sheet described according to claim 1~any one of 6, which is characterized in that the 1st surface is protected Protect the film that film is self-adhesion mould assembly.
9. the optical thin film of sheet described according to claim 1~any one of 8, which is characterized in that the 2nd surface is protected Protecting film has the 2nd base film and the 2nd adhesive phase, and clips the 2nd adhesive phase to be laminated in the 1st surface protection thin Film.
10. the optical thin film of sheet described according to claim 1~any one of 8, which is characterized in that the 2nd surface Protective film is the film of self-adhesion mould assembly.
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