CN107031079A - The manufacture method of laminated optical film - Google Patents
The manufacture method of laminated optical film Download PDFInfo
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- CN107031079A CN107031079A CN201610821108.6A CN201610821108A CN107031079A CN 107031079 A CN107031079 A CN 107031079A CN 201610821108 A CN201610821108 A CN 201610821108A CN 107031079 A CN107031079 A CN 107031079A
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- film
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- polarizer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
- B29D11/00788—Producing optical films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
- B32B37/003—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid air inclusion
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/045—Light guides
- G02B1/048—Light guides characterised by the cladding material
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
Abstract
The present invention provides the manufacture method of laminated optical film, and it can suppress optical film surface and be overlapped in the damage of the resin layer surface of optical film.The manufacture method of laminated optical film possesses：Bonding process that the film 32a of the resin containing active energy ray-curable working procedure of coating is formed on film-like substrate 22a surface, be fitted in via film 32a on the surface of optical film (polarizer 38) by base material 22a, by base material 22a sides activation-energy-ray L is irradiated to film 32a, resin bed 32b curing process is formed by film 32a.The transmitance of activation-energy-ray L in base material 22a is more than 70%.
Description
Technical field
The present invention relates to the manufacture method of laminated optical film.
Background technology
Polarizer is one kind of laminated optical film, constitutes liquid crystal display device.Polarizer has, and is used as one kind of optical film
Polarizer and be laminated in polarizer one or two sides diaphragm.It is following Patent Document 1 discloses, by
The one or two sides application of resin solution of light polarizing film, forms transparent resin bed.It is necessary to protect the light beyond polarizer
Under the occasion for learning film, laminated optical film has and optical film overlapped resin bed.
(patent document 1) Japanese Patent Laid-Open 2000-199819 publications
The content of the invention
In recent years, along with the slimming of the mobile devices such as smart mobile phone, the stacking optics used in mobile device is sought
Film becomes thinner.A thinning method of laminated optical film is to replace conventional diaphragm, light is overlapped with thinner protective layer
Learn on film.For example, during manufacture Polarizer, being formed and being penetrated containing activation energy on the surface of polarizer using coating devices such as gravure rolls
The film of line curable resin, with activation-energy-ray by the curing of coating, easily forms the protection thinner than conventional diaphragm
Layer (resin bed).But, when applying film on the surface in polarizer, coating device is in contact with polarizer so as to meeting
Damage the surface of polarizer.Formed on the surface of the optical film beyond polarizer under the occasion of protective layer, it is also possible to go out
Now such the problem of.Namely because coating device scratches the surface of optical film, so that the optical property of optical film can be damaged.This
Outside, the protective layer (resin bed) formed on the surface of polarizer because it is too thin the reason for, process that also can be after or transport
When the contact with roller etc. and be scratched.
The present invention be in view of said circumstances and make, its object is to provide that optical film surface and and optics can be suppressed
The manufacture method of the laminated optical film of the damage of the overlapping resin layer surface of film.
The manufacture method of laminated optical film involved by the mode of the present invention, it has：On the surface of film-like substrate
The working procedure of coating of the upper film for forming the resin containing active energy ray-curable, the table with base material to be fitted in optical film via film
Bonding process on face, irradiates activation-energy-ray by the lateral film of base material, the curing process of resin bed is formed by film.In base material
Activation-energy-ray transmitance more than 70%.
In the mode of the present invention, activation-energy-ray can be ultraviolet.
In the mode of the present invention, base material can contain, cyclic polyolefin hydrocarbon system resin, polypropylene-based resin, acrylic acid
At least one selected in the group for being resin and polyethylene-based resin composition.
In the mode of the present invention, active energy ray-curable resin can be, epoxy system resin, acrylic resin
And at least one selected in the group of oxetanes system resin composition.
In the manufacture method for the laminated optical film that the mode of the present invention is related to, can further have after curing process
There is the stripping process from resin bed peeling base.
, can be in no reality in the working procedure of coating of the manufacture method of laminated optical film involved by the mode of the present invention
Film is formed on the surface for the base material for applying surface roughening processing.
In the mode of the present invention, resin bed can be the protective layer for protecting optical film.
According to the present invention there is provided can suppress optical film surface and be overlapped in optical film resin layer surface damage layer
The manufacture method of folded optical film.
Brief description of the drawings
Fig. 1 is the ideograph for the manufacture method for showing the Polarizer involved by the first embodiment of the present invention.
(c) in (a) in Fig. 2, (b) in Fig. 2 and Fig. 2 is to show inclined involved by the first embodiment of the present invention
The ideograph of the manufacture method of tabula rasa.
Fig. 3 is the ideograph for the manufacture method for showing the Polarizer involved by second embodiment of the present invention.
(c) in (a) in Fig. 4, (b) in Fig. 4 and Fig. 4 is to show inclined involved by second embodiment of the present invention
The ideograph of the manufacture method of tabula rasa.
Symbol description
38 ... polarizers (optical film), 32a, 52a, 54a ... film, 32b, 52b, 54b ... resin bed (protective layer),
22a, 42a, 44a ... base material, L ... activation-energy-rays.
Embodiment
Illustrated referring to the figure embodiment suitable to the present invention.In figure, same component parts mark is identical
Symbol.The present invention is not limited to following embodiments.
(first embodiment)
First embodiment is related to a kind of manufacture method of Polarizer as laminated optical film.First embodiment institute
The manufacture method for the Polarizer being related at least has working procedure of coating, bonding process, curing process.In working procedure of coating, in membranaceous base
The film of the resin containing active energy ray-curable is formed on the surface of material.In bonding process, base material is fitted in light via film
On the surface for learning film.In curing process, activation-energy-ray is irradiated by the lateral film of base material, resin bed is formed by film.It is right below
Each operation is described in detail.
[working procedure of coating]
As shown in (a) in Fig. 1 and Fig. 2, in the working procedure of coating of first embodiment, first layer stack 24 is used.First
Layered product 24 has：Membranaceous polarizer 38, the adhesive phase 36 overlapping with polarizer 38, fits via adhesive phase 36
In the diaphragm 34 of polarizer 38.
Membranaceous polarizer 38 can be according to for example following sequentially built.
Membranaceous polyvinyl alcohol resin is stretched along single shaft direction or biaxially oriented first.Then, iodine or two are passed through
Color pigment is dyed to polyvinyl alcohol resin.In order to be crosslinked, by the polyvinyl alcohol resin after dyeing in cross-linking agent solution (example
Such as, boric acid aqueous solution) in handled.After being handled by crosslinking agent, polyvinyl alcohol resin is washed, is then dried.
After sequence described above, polarizer 38 is obtained.Polyvinyl alcohol resin can be by by polyvinyl acetate system resin soap
Change and obtain.Polyvinyl acetate system resin can be for example, as the homopolymer of vinyl acetate polyvinyl acetate or
The copolymer (for example, vinyl-vinyl acetate copolymer) of person's vinyl acetate and other monomers.It is common with vinyl acetate
Poly- other monomers, can be unsaturated carboxylic acid class in addition to ethene, olefines, vinyl ethers, unsaturated sulfonic acid class,
Or the acrylic amide with ammonium.Polyvinyl alcohol resin can be with modified.Modified polyvinyl alcohol resin can be
For example, the polyvinyl formal being modified through aldehydes, polyvinyl acetal or polyvinyl butyral resin.
The thickness of polarizer 38 can be less than 10 μm or less than 8 μm.Polarizer 38 is thinner, easier to realize partially
The slimming of tabula rasa.The thickness of polarizer 38 can be more than 2 μm.The more thick then easier raising polarizer of polarizer 38
38 mechanical strength.
Diaphragm 34 has the function of protection polarizer 38.As long as thermoplastic resin of the diaphragm 34 with translucency
, can be optically transparent thermoplastic resin.The resin for constituting diaphragm 34 can be for example, chain polyolefin tree
Fat, cyclic polyolefin hydrocarbon system resin, cellulose esters system resin, polyester based resin, polycarbonate-based resin, (methyl) acrylic acid series tree
Fat, polystyrene resin or these mixture or copolymer.
Chain polyolefin-based resins can be for example, chain olefin as polyethylene-based resin or polypropylene-based resin
Homopolymer.Chain polyolefin-based resins can be the copolymer formed by more than two kinds of chain olefin.
Cyclic polyolefin hydrocarbon system resin can be open loop (co) polymer or the addition of cyclic olefin for example, cyclic olefin
Polymer.Cyclic polyolefin hydrocarbon system resin can be for example, cyclic olefin and the copolymer of chain olefin are (for example, random copolymerization
Thing).The chain olefin for constituting copolymer can be for example, ethene or propylene.Cyclic polyolefin hydrocarbon system resin can be above-mentioned polymerization
Thing is through unsaturated carboxylic acid or its derivative modified graft polymers or its hydride.Cyclic polyolefin hydrocarbon system resin can be
For example, having used the norbornene resin of the norborneol alkene monomer such as ENB or polycyclic norborneol alkene monomer.
Cellulose esters system resin can be for example, Triafol T (triacetyl cellulose), cellulose diacetate, propionic acid
Cellulose or dipropyl acid cellulose.These copolymer can be used.A part for hydroxyl can be used by other substituents
The cellulose esters system resin of modification.
The polyester based resin beyond cellulose esters system resin can be used.Polyester based resin can be for example, polybasic carboxylic acid
Or derivatives thereof condensation polymer with polyalcohol.Polybasic carboxylic acid or derivatives thereof can be dicarboxylic acids or derivatives thereof.Polynary carboxylic
Acid or derivatives thereof can be for example, terephthalic acid (TPA), M-phthalic acid, dimethyl terephthalate (DMT) or naphthalene dicarboxylic acids diformazan
Ester.Polyalcohol can be such as glycol.Polyhydric alcohols are if any ethylene glycol, propane diols, butanediol, neopentyl glycol or hexamethylene two
Methanol.
Polyester based resin can be such as polyethylene terephthalate, polybutylene terephthalate, poly- adjacent benzene two
Formic acid esters, PEN, PBN, PTT, poly- naphthalenedicarboxylic acid
Propylene glycol ester, cyclohexanedimethanol's dimethyl ester or poly- naphthalenedicarboxylic acid cyclohexanedimethylene terephthalate.
Polycarbonate-based resin is the polymer that polymerized unit (monomer) is bonded by carbonate group.It is polycarbonate-based
Resin can be modified polycarbonate or copolymerization polycarbonate with the polymer backbone after modification.
(methyl) acrylic resin, can be for example poly- (methyl) acrylate (such as polymethyl methacrylate)；
Methyl methacrylate-(methyl) acrylic copolymer；Methyl methacrylate-(methyl) acrylate copolymer；Methyl-prop
E pioic acid methyl ester-acrylate-(methyl) acrylic copolymer；(methyl) acrylate-styrene copolymer (such as MS trees
Fat)；Methyl methacrylate and copolymer (such as methyl methacrylate-methyl-prop of the compound with alicyclic alkyl
Olefin(e) acid hexamethylene base co-polymer, methyl methacrylate-(methyl) acrylic acid norborneol copolymer etc.).
Diaphragm 34, which can contain, is selected from lubricant, plasticizer, dispersant, heat stabilizer, ultra-violet absorber, infrared ray
At least one additive selected in the group of absorbent, antistatic additive and antioxidant formation.
The thickness of diaphragm 34 can be less than 90 μm, less than 50 μm or less than 30 μm.Diaphragm 34 is thinner, Polarizer
Slimming is easier.The thickness of diaphragm 34 can be more than 5 μm.Diaphragm 34 is thicker, the mechanical strength of diaphragm 34 and behaviour
The property made is easier to be improved.
Diaphragm 34 can be the film as phase retardation film or brightness raising film with optical function.For example by will be upper
The film stretching of thermoplastic resin formation is stated, or liquid crystal layer etc. is formed on the film, can obtain imparting arbitrary phase difference value
Phase retardation film.
Adhesive phase 36 can contain active energy ray-curable described later containing aqueous adhesives such as polyvinyl alcohol
Resin.The thickness of the adhesive phase 36 of solidification can be such as less than more than 0.05 μm 10 μm.Adhesive phase 36 is thicker, then polarizes
It is more difficult to be formed bubble between element 38 and diaphragm 34, polarizer 38 and diaphragm 34 is more easy firmly bonds.Adhesive
Layer 36 is thinner, and the slimming of Polarizer is easier.
As shown in (a) in Fig. 1 and Fig. 2, in the working procedure of coating of first embodiment, using coating device 1, in membranaceous base
The film 32a of the resin containing active energy ray-curable is formed on material 22a surface.Being made namely in working procedure of coating has base
Material 22a, the second layered product 22b for foring on base material 22a surface film 32a.Coating device 1 can be for example, MCD types
The notch board coating machine such as ultraprecise coating machine.Film 32a can be formed only by active energy ray-curable resin.As described above, because
Formed for film 32a on base material 22a surface rather than on the surface of polarizer 38, so coating device 1 is not direct
It is in contact with the surface of polarizer 38.So as to which the polarizer 38 because caused by being in contact with coating device 1 will not be produced
The damage on surface.
The transmitance of activation-energy-ray in base material 22a is more than 70%.Activation-energy-ray can be for example, ultraviolet,
Visible ray, electron beam or X-ray.The transmitance of activation-energy-ray in base material 22a can more than 75%, more than 76.7%,
More than 80% or more than 89%.The transmitance of activation-energy-ray in base material 22a is below 95%, less than 99% or not enough
100%.In addition, the transmitance T of the activation-energy-ray in base material 22a can be defined as example, (I/I0)×100。I0It is base material
The radiant exitance of incident activation-energy-ray in 22a.I is the radiant exitance for the activation-energy-ray for having passed through base material 22a.
The transmitance of activation-energy-ray in base material 22a can use for example, Japan Spectroscopy Corporation ultraviolet-
Visible ray-near infrared spectrometer " V-7100 " is determined.
Activation-energy-ray can be ultraviolet.Base material 22a of the transmitance of ultraviolet more than 70%, can be containing for example
Selected at least in the group that cyclic polyolefin hydrocarbon system resin, polypropylene-based resin, acrylic resin and polyethylene-based resin are constituted
It is a kind of.
Cyclic polyolefin hydrocarbon system resin can be open loop (co) polymer or the addition of cyclic olefin for example, cyclic olefin
Polymer.Cyclic polyolefin hydrocarbon system resin can be for example, cyclic olefin and the copolymer of chain olefin are (for example, random copolymerization
Thing).The chain olefin for constituting copolymer can be for example, ethene or propylene.Cyclic polyolefin hydrocarbon system resin can be above-mentioned polymerization
Thing is through unsaturated carboxylic acid or its derivative modified graft polymers or its hydride.Cyclic polyolefin hydrocarbon system resin can be
For example, using the norbornene resin of the norborneol alkene monomer such as ENB or polycyclic norborneol alkene monomer.
Acrylic resin ((methyl) acrylic resin) can be for example, poly- (methyl) acrylate (such as poly- first
Base methyl acrylate)；Methyl methacrylate-(methyl) acrylic copolymer；Methyl methacrylate-(methyl) acrylate
Copolymer；Methyl methacrylate-acrylate-(methyl) acrylic copolymer；(methyl) acrylate-styrene copolymerization
Thing (such as MS resins)；Methyl methacrylate and copolymer (such as methacrylic acid of the compound with alicyclic alkyl
Methyl esters-methacrylic acid hexamethylene base co-polymer, methyl methacrylate-(methyl) acrylic acid norborneol copolymer etc.).
Active energy ray-curable resin is the resin by irradiating activation-energy-ray to it and solidifying.Activation-energy-ray is consolidated
The property changed resin can be a kind of resin, can also contain various kinds of resin.
When activation-energy-ray is ultraviolet, active energy ray-curable resin is uv curing resin.Ultraviolet is consolidated
The property changed resin can be modulated to non-solvent adhesive.Therefore active energy ray-curable resin is uv curing resin
When, after working procedure of coating, bonding process or curing process, it is possible to implement remove the drying process of solvent.In addition, ultraviolet curing
Property resin is compared with aqueous adhesive, and easily the diaphragm low with moisture permeability is used in combination.
Uv curing resin can contain, cationically polymerizable curability compound or free-radical polymerised solidification
Property compound.Uv curing resin can draw containing the cationic polymerization for the curing reaction for triggering above-mentioned curability compound
Send out agent or radical polymerization initiator.
Cationically polymerizable curability compound can be for example epoxy system resin (intramolecular have at least one epoxy radicals
Compound) or the oxetanes system resin compound of at least one oxetanes ring (intramolecular have).Radical polymerization
Close property curability compound can be for example (methyl) acrylic resin (intramolecular have at least one (methyl) acryloyl-oxy
The compound of base).Free-radical polymerised curability compound, can be the ethene base system tree with free-radical polymerised double bond
Fat.
Active energy ray-curable resin, can contain cationic polymerization accelerator, ion capturing agent, antioxygen as needed
Agent, chain-transferring agent, bonding imparting agent, thermoplastic resin, filler, flowing regulator, plasticizer, defoamer, antistatic additive, stream
Flat agent or solvent etc..
Activation-energy-ray can be ultroviolet A (UVA).Ultroviolet A is the ultraviolet that wavelength is 400~315nm.Structure
Resin into base material 22a of the transmitance more than 70% of ultroviolet A can be for example, cyclic polyolefin hydrocarbon system resin, poly- third
Alkene system resin or acrylic resin.Active energy ray-curable resin (the ultraviolet solidified by the irradiation of ultroviolet A
Curable resin) can be for example, epoxy system resin, acrylic resin or oxetanes system resin.Activation-energy-ray can
To be Ultra Violet-B (UVB).Ultra Violet-B is the ultraviolet that wavelength is 315~280nm.Constitute the transmitance of Ultra Violet-B
The resin of base material 22a more than 70% can be for example, cyclic polyolefin hydrocarbon system resin, polypropylene-based resin or acrylic acid series tree
Fat.The active energy ray-curable resin (uv curing resin) solidified by the irradiation of Ultra Violet-B can be example
Such as, epoxy system resin, acrylic resin or oxetanes system resin.Activation-energy-ray can be ultraviolet C ripple (UVC).
Ultraviolet C ripple is ultraviolet of the wavelength less than 280nm.Resins of the base material 22a using the transmitance of ultraviolet C ripple more than 70%
.
Activation-energy-ray can be visible ray.Resins of the base material 22a using the transmitance of visible ray more than 70%.
For example, activation-energy-ray is ultraviolet using high-pressure mercury-vapor lamp as light source, the ultraviolet wavelength is 300nm, base material
When 22a is formed by cyclic polyolefin resin film or polypropylene-based resin film, the transmitance of the activation-energy-ray in base material 22a is
89%.The active energy ray-curable resin now solidified by the irradiation of activation-energy-ray is for example, epoxy system resin.Example
Such as, activation-energy-ray be ultraviolet using high-pressure mercury-vapor lamp as light source, the ultraviolet wavelength be 300nm, base material 22a is by acrylic acid
During resin film formation, the transmitance of the activation-energy-ray in base material 22a is 76.7%.Now pass through the irradiation of activation-energy-ray
And the active energy ray-curable resin solidified is for example, epoxy system resin.
Base material 22a thickness can be for example, less than more than 5 μm 100 μm.Base material 22a is thinner, then the work in base material 22a
The transmitance of change energy ray is tended to higher.Base material 22a is thicker, then the transmitance of the activation-energy-ray in base material 22a is tended to
It is lower.
[bonding process]
As shown in (a) in Fig. 1 and Fig. 2, first layer stack 24 is transferred along direction d24, a pair of doubling roller (rollers are supplied to
7a and 7b) between.The surface for the diaphragm 34 that guide roller 5a has with first layer stack 24 is in contact.In addition, along direction d22
The second layered product 22b is transferred, is supplied between a pair of rolls 7a and 7b.The base material 22a that guide roller 5b and the second layered product 22b have
Surface be in contact.
As shown in Fig. 1 and (a) and (b) in Fig. 2, in bonding process, with the second layered product 22b film 32a and the
The polarizer 38 of one layered product 24 is relative, and the layered product of first layer stack 24 and second is overlapped.Overlapping first layer stack
24 and second layered product 22b by a pair of rolls 7a and 7b clamp.In other words, using a pair of doubling rollers, via film 32a by base material
22a fits with the surface of polarizer 38.Result is to have obtained third layer stack 26a, and it has base material 22a and base material 22a weights
Folded film 32a, the polarizer 38 overlapping with film 32a, the adhesive phase 36 and adhesive phase overlapping with polarizer 38
36 overlapping diaphragms 34.
[curing process and stripping process]
As shown in figure 1, transferring third layer stack 26a between a pair of rolls 7a and 7b along direction d26.Then in solidification work
In sequence, activation-energy-ray L is irradiated by the lateral film 32a of base material 22a using irradiation unit 3.Namely via base material 22a to film
32a irradiates activation-energy-ray L indirectly.Namely activation-energy-ray L reaches film 32a through base material 22a.Penetrated by activation energy
Line L irradiation, film 32a is solidified into resin bed 32b.
Irradiation unit 3 can be such as Cooper-Hewitt lamp, middle medium pressure mercury lamp, high-pressure mercury-vapor lamp, extra-high-pressure mercury vapour lamp, chemistry
Lamp, black light lamp, microwave-excitation light lamp or metal-halide lamp.
Stripping process can be implemented after curing process.Shown in (b) and (c) such as Fig. 1 and in Fig. 2, in stripping process,
Base material 22a is peeled off by third layer stack 26a resin bed 32b.In stripping process, guide roller 5c and third layer stack 26a has
Some base material 22a are in contact.The 4th layered product 26b after base material 22a will have been peeled off to transfer to direction d26.
Under the occasion for implementing stripping process, Polarizer does not possess base material 22a.The Polarizer completed via stripping process
Shown in (c) in (the 4th layered product 26b), such as Fig. 2, have：Resin bed 32b, polarizer directly overlapping with resin bed 32b
38th, the diaphragm 34 of polarizer 38 is fitted in via adhesive phase 36.As long as in addition, not being necessarily need not in subsequent handling
, can not also peeling base 22a during base material 22a.Base material 22a can suppress resin bed 32b table by protecting resin bed 32b
The appearance of scar or bumps on face.
Resin bed 32b can be the protective layer for protecting polarizer 38.Resin bed 32b can be optical compensating layer (OC
Layer).Polarizer (the 4th layered product 26b) can possess other optical layers for being laminated in diaphragm 34 or resin bed 32b.Other light
It can be such as reflection type polarizing film, the film with anti-dazzle function, the film with surface anti-reflective function, reflectance coating, half to learn layer
Through reflectance coating, compensation film for angular field of view, hard conating, adhesive phase, touch sensor layer, antistatic backing or stain-proofing layer.
In curing process, the transmitance of the activation-energy-ray L in base material 22a is more than 70%, therefore, with the work in base material
The occasion for changing the energy ray L not enough lower limit of transmitance is compared, and film 32a is easily homogeneous and is fully cured.As a result, shape
It is high into hardness, it is not easy to the resin bed 32b being scraped off.Therefore, under the occasion from resin bed 32b peeling base 22a,
A resin bed 32b part or uncured resin are difficult to be attached on the surface of the base material 22a after peeling off.It can namely press down
The resin bed 32b bonded on base material 22a processed surface, its damage occurred along with base material 22a stripping.Based on above-mentioned reason
By, it is suppressed that the resin bed 32b overlapping with membranaceous polarizer 38 (optical film) damage.
, can be on the surface without the base material 22a for implementing surface roughening processing in working procedure of coating when implementing stripping process
Form film 32a.When implementing surface roughening processing on base material 22a, film 32a easily fits closely with base material 22a surface,
Film 32a (resin bed 32b) peeling base 22a after solidifying becomes difficult.In addition, implementing surface roughening on base material 22a
During processing, along with the sur-face peeling base material 22a from the resin bed 32b connected with base material 22a, damage is occurred in that.Therefore, pass through
Formed and peeled off in film 32a, stripping process by resin bed 32b on the surface without the base material 22a for implementing surface roughening processing
Base material 22a becomes easy, can suppress the damage on resin bed 32b surface.Surface roughening processing can be such as plasma
Processing, sided corona treatment, ultraviolet treatment with irradiation, fiery frame processing (flame treatment).
Stripping process can not be implemented., can be before working procedure of coating to base material 22a's under the occasion for not implementing stripping process
Implement roughening processing in surface.In ensuing working procedure of coating, film can be formed on surface roughening base material 22a surface
32a.As a result, becoming difficult from peeling base 22a on resin bed 32b.Under the occasion for not implementing stripping process, the polarisation of completion
Plate, which possesses, to be had：Base material 22a, the resin bed 32b overlapping with base material, the polarizer 38 overlapping with resin bed 32b, via adhesive
Layer 36 is fitted on the diaphragm 34 on polarizer 38.Base material 22a can have the function of the film of protection polarizer 38.Polarisation
Plate can have the other optical layers being laminated on base material 22a.
(second embodiment)
The manufacture method of Polarizer involved by second embodiment of the present invention, except the item of following record, other
It is identical with first embodiment.Second embodiment, it is identical with first embodiment, it can suppress and (the optics of polarizer 38
Film) overlapping resin bed 32b damage.The item common to first embodiment and second embodiment omitted below is said
It is bright.
The manufacture method for the Polarizer that second embodiment is related to, identical with first embodiment, at least possessing has coating
Process and bonding process and curing process.Simply, in the working procedure of coating of second embodiment, on the respective surface of a pair of base materials
Upper formation film.In the bonding process of second embodiment, membranaceous polarizer is configured between a pair of base materials.Then via
A pair of base materials are fitted in the two sides of polarizer by film.In the curing process of second embodiment, by respectively by a pair of bases
Activation-energy-ray is irradiated in each side of material to film, forms a pair of resin beds for being clamped with polarizer.Each operation is carried out below detailed
Carefully illustrate.
As shown in (a) in Fig. 3 and Fig. 4, in the working procedure of coating of second embodiment, using coating device 1a, membranaceous
The film 54a of the resin containing active energy ray-curable is formed on base material 44a surface, layered product 44b is made.Second embodiment
Layered product 44b, can be identical with the second layered product 22b of first embodiment.In addition, in working procedure of coating, being laid using painting
Standby 1b, forms the film 52a of the resin containing active energy ray-curable on film-like substrate 42a surface, makes layered product 42b.
The layered product 42b of second embodiment, can be identical with the second layered product 22b of first embodiment.Layered product 44b film
54a composition, can be identical with layered product 42b film 52a.Layered product 44b film 54a composition can be with layered product
42b film 52a is different.Layered product 44b base material 44a composition, can be identical with layered product 42b base material 42a.Layered product
44b base material 44a composition, can be different from layered product 42b base material 42a.As described above, because film 52a formation is in base
On material 42a surface rather than on the surface of polarizer 38, so the surfaces of coating device 1b not directly with polarizer 38
It is in contact.In addition, film 54a formation is on base material 44a surface rather than on the surface of polarizer 38, so coating device
Surfaces of the 1a not directly with polarizer 38 is in contact.Therefore, being not in the contact because with coating device 1a and 1b and causing
Polarizer 38 two surfaces damage.
As shown in figure 3, in second embodiment, transferring layered product 44b along direction d44, being supplied to a pair of doubling roller (rollers
7c and 7d) among.Guide roller 5d is in contact with the layered product 44b base material 44a having surface.In addition, being transferred along direction d42
Layered product 42b, is supplied between roller 7c and 7d.Guide roller 5e is in contact with the layered product 42b base material 42a having surface.This
Outside, membranaceous polarizer 38 is supplied between roller 7c and 7d.
Shown in (a) and (b) such as Fig. 3 and in Fig. 4, in the bonding process of second embodiment, polarizer 38 is clamped
Between a pair of layered products 44b and 42b.Layered product 44b film 54a is relative with a surface of polarizer 38.Layered product
42b film 52a is relative with another surface of polarizer 38.Then layered product 44b, polarizer 38 and layered product 42b
It is held on overlapping between a pair of rolls 7c and 7d.As a result, as shown in (b) in Fig. 4, base material 44a fits via film 54a
On a surface of polarizer 38, base material 42a is fitted on another surface of polarizer 38 via film 52a.Also
It is to have obtained layered product 46a in bonding process, it has：Base material 42a, the film 52a overlapping with base material 42a and film 52a weights
Folded polarizer 38, the film 54a overlapping with polarizer 38, the base material 44a overlapping with film 54a.
As shown in figure 4, in second embodiment, layered product 46a is transferred between a pair of rolls 7c and 7d along direction d46.
Then, irradiation unit 3a is used in curing process, activation-energy-ray L is irradiated by the lateral film 54a of base material 44a indirectly, makes painting
Film 54a solidifies.Namely activation-energy-ray L reaches film 54a through base material 44a.Irradiation unit 3b is used simultaneously, by base material
The lateral film 52a of 42a irradiate activation-energy-ray L indirectly, solidify film 52a.Namely activation-energy-ray L passes through base material
42a reaches film 52a.Curing process more than, forms resin bed 52b by film 52a, resin bed is formed by film 54a
54b。
Shown in (b) and (c) such as Fig. 3 and in Fig. 4, in second embodiment, it can implement to peel off work after curing process
Sequence.In stripping process, from peeling base 44a on layered product 46a resin bed 54b.In stripping process, guide roller 5f and layered product
The base material 44a that 46a has connects.In addition, in stripping process, from layered product 46a resin bed 52b peeling base 42a.Peel off work
In sequence, guide roller 5g connects with the base material 42a that layered product 46a has.By the layered product 46b peeled off on base material 42a and 44a along
Direction d46 is transferred.
When implementing stripping process, Polarizer does not possess base material 42a or 44a.For example, the Polarizer completed via stripping process
At least possess：Resin bed 52b, with resin bed 52b directly equitant polarizers 38, direct equitant with polarizer 38
Other resin beds 54b.Polarizer, which can possess, is laminated on resin bed 52b or 54b other optical layers.As long as in addition, follow-up
It is not not need base material 42a or 44a necessarily in process, can not peeling base 42a or 44a.Resin bed is protected by base material 42a
52b, can suppress the scar on resin bed 52b surface or the generation of bumps.Resin bed 54b is protected by base material 44a, can be with
Suppress the scar on resin bed 54b surface or the generation of bumps.
When implementing stripping process, can be used in working procedure of coating base material 42a without the surface roughening processing of implementation and
44a。
In second embodiment, in stripping process can peeling base 42a or 44a either one.Peeling base 42a
Or 44a either one when, in working procedure of coating, as the base material without stripping side, can use and not implement surface roughening place
The base material of reason.In second embodiment, stripping process can not be implemented.When not implementing stripping process, it can make in working procedure of coating
With the base material for implementing surface roughening processing.Base material is configured with the outer surface for the Polarizer do not implemented stripping process and completed
42a and 44a.The Polarizer, can have the other optical layers being laminated on base material 42a or 44a.
The first embodiment and second embodiment to the present invention are illustrated above, but the present invention is not limited to
State embodiment.
For example, form the optical film of resin bed, polarizer can not be, but other optical layers.For example, passing through
, can be in diaphragm, reflection type polarizing film, with anti-dazzle work(with forming method same during resin bed on the surface of polarizer
Film, the film with surface anti-reflective function, reflectance coating, semipermeable reflection film, compensation film for angular field of view, touch sensor layer or the liquid of energy
Resin bed is formed on the surface of the optical layer of crystal layer etc..
(embodiment)
Hereinafter, present disclosure is explained by using embodiment and comparative example, but the present invention is not limited
In following embodiment.
[embodiment 1]
(1) prime coat formation process
In the hot water that polyvinyl alcohol powder is dissolved in 95 DEG C, the polyvinyl alcohol water solution that modulation concentration is 3 weight %.As
Polyvinyl alcohol powder, (average degree of polymerization 1100, saponification degree 99.5 rubs " Z-200 " made using Japanese synthetic chemical industry (strain)
You are %).The mixed cross-linker in polyvinyl alcohol water solution.Relative to the parts by weight of polyvinyl alcohol powder 6, the addition of crosslinking agent is adjusted
To 5 parts by weight.As crosslinking agent, " the SUMIREZ resins 650 " made using field ridge chemical industry (strain).By above process, obtain
To the coating liquid (coating liquid 1) of prime coat formation.
As base material film, prepare the un-stretched polypropylene film (melting point of 90 μm of thickness：163℃).It is real to the one side of base material film
Apply sided corona treatment.On the surface of base material film for implementing sided corona treatment, path gravure coating machine, coating liquid coating 1 are used.
Coating liquid coated on base material film is dried 10 minutes at 80 DEG C, by this, prime coat is formed.The thickness of prime coat is 0.2 μ
m。
(2) making (resin bed formation process) of stacked film
In the hot water that polyvinyl alcohol powder is dissolved in 95 DEG C, modulation concentration 8 weight % polyvinyl alcohol water solution.As poly-
Vinyl alcohol powder, uses " PVA124 " (average degree of polymerization 2400,98.0~99.0 moles of % of saponification degree) of (strain) Kuraray.Will
The polyvinyl alcohol water solution is used as the coating liquid (coating liquid 2) of polyvinyl alcohol resin layer formation.
On the surface of the prime coat formed on base material film, labial lamina coating machine, coating liquid coating 2 are used.By prime coat
Surface on coated coating liquid 2 dried 20 minutes at 80 DEG C, by this, polyvinyl alcohol resin is formed on prime coat
Layer.By above process, base material film is obtained, the prime coat overlapping with base material film, the polyvinyl alcohol resin overlapping with prime coat
The stacked film that layer is formed.
(3) making (stretching process) of stretched film
5.3 times of uniaxial tension is implemented to the free end of stacked film at 160 DEG C, stretched film is obtained.The stretching of stacked film, makes
With floating type vertical uniaxial stretching device.The thickness of polyvinyl alcohol resin layer after stretching is 5.0 μm.
(4) making (dyeing process) of polarity stacked film
Stretched film is impregnated about 180 seconds in the aqueous solution (dyeing liquor) of iodine and KI, polyethenol series tree is carried out
The dyeing processing of lipid layer.The temperature of dyeing liquor is adjusted to 30 DEG C.The weight of iodine in dyeing liquor, is adjusted to every 100 parts by weight water
In 0.6 parts by weight.The weight of KI in dyeing liquor, is adjusted to 10 parts by weight in every 100 parts by weight water.After dyeing processing,
Using 10 DEG C of pure water, the upper remaining dyeing liquor of polyvinyl alcohol resin layer is washed away.
Then, in the first crosslinking Treatment, stretched film is immersed in the aqueous solution of boronic acid containing (the first crosslinked fluid) 120 seconds
Clock.The temperature of first crosslinked fluid is adjusted to 78 DEG C.The weight of boric acid in first crosslinked fluid, is adjusted in every 100 parts by weight water
9.5 parts by weight.
Then, in the second crosslinking Treatment, stretched film is soaked in the aqueous solution (the second crosslinked fluid) of boronic acid containing and KI
Stain 60 seconds.The temperature for adjusting the second crosslinked fluid is 70 DEG C.The weight of boric acid in second crosslinked fluid, is adjusted to every 100 weight
9.5 parts by weight in part water.The weight of KI in second crosslinked fluid, is adjusted to 4 parts by weight in every 100 parts by weight water.
After second crosslinking Treatment, stretched film is cleaned 10 seconds in 10 DEG C of pure water.Dried at 40 DEG C after cleaning
Stretched film 300 seconds.
By above process, obtain base material film and, the polarity stacking of overlapping with base material film membranaceous polarizer formation
Film.
(5) making of the polarizer with diaphragm
As the first diaphragm, prepare the film of triacetate fiber prime system resin formation.The thickness of first diaphragm is 25 μm.
When Polarizer is configured on the display unit, the first diaphragm is configured at outside (opposite side of display unit).
Implement sided corona treatment on the surface of first diaphragm.On the surface of the first diaphragm for implementing sided corona treatment,
Ultraviolet-curing adhesive is applied, first adhesive phase is formed.As ultraviolet-curing adhesive, (strain) ADEKA is used
" KR-70T " of system.The coating of ultraviolet-curing adhesive, uses path gravure coating machine.
Via first adhesive phase, the first diaphragm is fitted in the surface of the polarizer with polarity stacked film
On.The laminating of first diaphragm, uses a pair of doubling rollers.
Then, by using high-pressure mercury-vapor lamp, from the lateral first adhesive phase irradiation ultraviolet radiation of polarity stacked film, is made
One adhesive phase solidifies.The thickness of first adhesive phase after solidification is 1.2 μm.The accumulative light quantity for adjusting ultraviolet is 200mJ/
cm2。
By above process, obtain base material film, the polarizer overlapping with base material film, overlapping with polarizer first glue
The layered product that mixture layer, the first diaphragm being fitted in via first adhesive phase on polarizer are formed.By from the stacking
Peeling base film on body, obtain polarizer, the first adhesive phase overlapping with polarizer, via first adhesive phase fit
The polarizer with diaphragm of the first diaphragm formation on polarizer.
(6) making of Polarizer
(working procedure of coating)
In order to form protective layer, preparation is used as a kind of of active energy ray-curable resin (uv curing resin)
Epoxy system resin.When Polarizer is configured on display unit, protective layer is configured at display unit side.As epoxy resin, use
(strain) ADEKA " KR-25T ".As transfer substrate, prepare the film of cyclic polyolefin resin film formation.Transfer substrate
Thickness is 20 μm.Using path gravure coating machine, epoxy system resin is coated on the surface of base material, the shape on the surface of base material
Into the film of epoxy system resin formation.
(bonding process)
On the surface that transfer substrate is fitted in the polarizer for constituting the polarizer with diaphragm via film.Patch
Doubling roller is used in conjunction.
(curing process)
Using high-pressure mercury-vapor lamp by the lateral film irradiation ultraviolet radiation (activation-energy-ray) of transfer substrate.Pass through the photograph of ultraviolet
Penetrating makes curing of coating, forms resin bed.The accumulative light quantity for the ultraviolet being radiated in transfer substrate is adjusted to 200mJ/cm2.It is purple
The wavelength of outside line is 300nm.The transmitance of ultraviolet in transfer substrate, as described in Table 1.The thickness of resin bed is 3.5 μ
m。
(stripping process)
After curing process, transfer substrate is peeled off from resin bed.
By above process, the Polarizer of embodiment 1 is made, it, which possesses, has：Resin bed, the polarization member overlapping with resin bed
Part, first adhesive phase, the first diaphragm being fitted in via first adhesive phase on polarizer.
[embodiment 1~3, comparative example 1]
In addition to the transfer substrate shown in table 1 below is used, by method same as Example 1, other are made respectively
Embodiment and comparative example 1 in Polarizer.It is ultraviolet in other embodiments and the respective used transfer substrate of comparative example 1
The transmitance of line is as described in Table 1.
[comparative example 2]
In the working procedure of coating of comparative example 2, using path gravure coating machine, epoxy system resin is applied directly to constitute band guarantor
On the surface of the polarizer of the polarizer of cuticula, film is formed.
In the curing process of comparative example 2, to the film direct irradiation ultraviolet formed on the surface of polarizer, in polarization
Resin bed is formed on the surface of element.
As described above, in addition to forming resin bed without using transfer substrate, using method same as Example 1,
The Polarizer of comparison example 2.
The observation ＞ on the surface of ＜ resin beds
The Polarizer of embodiment 1 is cut off, sample is made.The size of sample is 500mm × 500mm.Sample is configured at glimmering
Under light lamp, make the surface for the resin bed that sample has to quasi-optical.Observe the reflection image of the light on the surface of resin bed.The knot of observation
Fruit is as described in Table 1.
By method same as Example 1, the surface of the other embodiments of observation and the respective resin bed of comparative example.See
Examine result as described in Table 1.The A that table 1 below is recorded means not find there is scar and bumps on the surface of resin bed.B
Mean to be found that bumps on the surface of resin bed.C means to be found that scar on the surface of resin bed.
【Table 1】
(industrial applicability)
According to the present invention it is possible to manufacture laminated optical film, the laminated optical film can suppress optical film surface and be overlapped in
The damage of the resin layer surface of optical film.
Claims (7)
1. a kind of manufacture method of laminated optical film,
It possesses working procedure of coating, bonding process, curing process,
In the working procedure of coating, the film of the resin containing active energy ray-curable is formed on the surface of film-like substrate,
In the bonding process, the base material is fitted on the surface of optical film via the film,
In the curing process, activation-energy-ray is irradiated by the lateral film of the base material, resin bed is formed by the film,
The transmitance of the activation-energy-ray in the base material is more than 70%.
2. the manufacture method of laminated optical film according to claim 1, the activation-energy-ray is ultraviolet.
3. the manufacture method of laminated optical film according to claim 1 or 2, the base material contains cyclic polyolefin hydrocarbon system tree
At least one selected in the group that fat, polypropylene-based resin, acrylic resin and polyethylene-based resin are constituted.
4. the manufacture method of laminated optical film according to claim 1 or 2, the active energy ray-curable resin be from
At least one selected in the group of epoxy system resin, acrylic resin and oxetanes system resin composition.
5. the manufacture method of laminated optical film according to claim 1 or 2, after the curing process, also further has
The standby stripping process that the base material is peeled off from the resin bed.
6. in the manufacture method of laminated optical film according to claim 1 or 2, the working procedure of coating, the film is not having
Have and formed on the surface for the base material for implementing surface roughening processing.
7. the manufacture method of laminated optical film according to claim 1 or 2, the resin bed is the protection optical film
Protective layer.
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| JP2015-180812 | 2015-09-14 | ||
| JP2015180812A JP6567931B2 (en) | 2015-09-14 | 2015-09-14 | Method for producing laminated optical film |
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| JP (1) | JP6567931B2 (en) |
| KR (1) | KR102675419B1 (en) |
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| CN111164473A (en) * | 2017-10-03 | 2020-05-15 | 日东电工株式会社 | Polarizing plate, image display device, and method for manufacturing polarizing plate |
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| JP2006163082A (en) * | 2004-12-08 | 2006-06-22 | Nippon Paper Chemicals Co Ltd | Optical member, manufacturing method thereof and liquid crystal display device |
| JP5728191B2 (en) * | 2010-09-30 | 2015-06-03 | リンテック株式会社 | Hard coat layer surface forming film, method for producing optical member with hard coat layer, and optical member with hard coat layer |
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| JP6127490B2 (en) * | 2012-12-11 | 2017-05-17 | 東亞合成株式会社 | Polarizer |
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| CN101104329A (en) * | 2006-07-12 | 2008-01-16 | 日东电工株式会社 | Method for producing multilayer laminated film |
| CN104122614A (en) * | 2013-04-26 | 2014-10-29 | 日东电工株式会社 | Polarizing film, method for manufacture thereof, optical film, and image display device |
| CN104765090A (en) * | 2014-01-07 | 2015-07-08 | 日东电工株式会社 | Method of producing pressure-sensitive adhesive layer attached one-side protection polarizing film |
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| KR20170032188A (en) | 2017-03-22 |
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| TW201722730A (en) | 2017-07-01 |
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| CN107031079B (en) | 2020-03-03 |
| JP6567931B2 (en) | 2019-08-28 |
| TWI692403B (en) | 2020-05-01 |
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