CN109910410A - The manufacturing method of laminated body - Google Patents
The manufacturing method of laminated body Download PDFInfo
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- CN109910410A CN109910410A CN201811533101.XA CN201811533101A CN109910410A CN 109910410 A CN109910410 A CN 109910410A CN 201811533101 A CN201811533101 A CN 201811533101A CN 109910410 A CN109910410 A CN 109910410A
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- base material
- resin base
- resin
- manufacturing
- laminated body
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- 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
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
-
- 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
- B32B7/00—Layered 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
- B32B7/03—Layered 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 with respect to the orientation of features
- B32B7/035—Layered 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 with respect to the orientation of features using arrangements of stretched films, e.g. of mono-axially stretched films arranged alternately
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- 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
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
- B32B2037/243—Coating
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
-
- 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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/02—Temperature
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
Abstract
The present invention provides the laminated body of the light polarizing film of energy forming properties homogenization.The manufacturing method of laminated body of the invention successively includes following process: the process that resin base material (11) is heated to the process of -15 DEG C of glass transition temperature (Tg) of resin base material (11) or more and forms polyvinyl alcohol resin layer (12) on resin base material (11).
Description
The application is that application No. is 201580038875.3, applying date 2015.2.4, the entitled " system of laminated body
Make method " application for a patent for invention divisional application.
Technical field
The present invention relates to the manufacturing methods of laminated body.In particular to resin base material and being formed in the resin base
The manufacturing method of the laminated body of polyvinyl alcohol (PVA) resin on material.
Background technique
It proposes and forms PVA resin by being coated on resin base material, which is stretched, dyes and obtain
Obtain the method (such as patent document 1, patent document 2) of light polarizing film.The thin light polarizing film of thickness can be obtained according to such method, because
This is concerned because for example can help to the slimming of image display device.It but in this case, can be inclined in the presence of obtaining
The performance (specifically film thickness, optical characteristics, appearance) of light film is easy to produce uneven problem.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Application 51-69644 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2001-343521 bulletin
Summary of the invention
Problems to be solved by the invention
The present invention is made to solve above-mentioned conventional problems, can manufacturing property its main purpose is, providing
The laminated body of the light polarizing film of homogenization.
The solution to the problem
The manufacturing method of laminated body of the invention successively includes following process: resin base material is heated to the resin base material
The process of -15 DEG C of glass transition temperature (Tg) or more and the work that polyvinyl alcohol resin layer is formed on aforementioned resin substrate
Sequence.
In 1 embodiment, resin base material made of web-like is taken up as from the resin base material of strip and winds off this
Resin base material carries out above-mentioned heating process.
In 1 embodiment, after saving in the state of above-mentioned batch, above-mentioned heating process is carried out.
In 1 embodiment, it is carried out continuously above-mentioned uncoiling process, above-mentioned heating process and above-mentioned polyethenol series tree
Rouge layer formation process.
In 1 embodiment, above-mentioned add is carried out in+15 DEG C of the glass transition temperature (Tg) or less of above-mentioned resin base material
Thermal process.
In 1 embodiment, the side conveying roller being set in heating furnace conveys above-mentioned resin base material, and side carries out above-mentioned
Heating process.
In 1 embodiment, the angle of embrace of the conveying roller in above-mentioned heating furnace is 90 ° or more.
In 1 embodiment, the distance between centers of the conveying roller in above-mentioned heating furnace is 2m or less.
In 1 embodiment, while conveying above-mentioned resin base material with stenter, side carries out above-mentioned heating process.
In 1 embodiment, the shrinking percentage of the resin base material based on above-mentioned heating is 3% or less.
In 1 embodiment, above-mentioned resin base material is formed by PET series resin.
In 1 embodiment, above-mentioned resin base material is stretched.
In 1 embodiment, above-mentioned polyvinyl alcohol resin layer is by that will include polyethenol series using die coating method
The coating fluid of resin is coated on above-mentioned resin base material and makes it dry and formed.
According to another aspect of the present invention, the manufacturing method of light polarizing film is provided.The manufacturing method use of the light polarizing film passes through
The laminated body that above-mentioned manufacturing method obtains.
In 1 embodiment, the process including being stretched to above-mentioned laminated body.
According to another aspect of the invention, the manufacturing method of polarizer is provided.The manufacturing method of the polarizer is included in logical
The process that protective film is laminated is crossed in the light polarizing film that above-mentioned manufacturing method obtains.
According to another aspect of the invention, stretching laminated body is provided.The stretching laminated body has resin base material and is formed in
Polyvinyl alcohol resin layer on the resin base material.The 200mm (MD) of above-mentioned polyvinyl alcohol resin layer × 200mm (TD) ruler
It is very little in film thickness be not 0.25 μm hereinafter, and above-mentioned polyvinyl alcohol resin layer 200mm (MD) × 200mm (TD) ruler
Slow axis in very little is not 0.50 ° or less.
According to another aspect of the invention, the manufacturing device of laminated body is provided.
In 1 embodiment, above-mentioned manufacturing device has: uncoiling means are taken up from the resin base material of strip
The resin base material is wound off for resin base material made of web-like；Heating furnace has the resin base for conveying aforementioned strip
The conveying roller of material and -15 DEG C of the glass transition temperature (Tg) or more that aforementioned resin substrate is heated to the resin base material；And
Coating means, the coating fluid comprising polyvinyl alcohol resin are coated on heated resin base material.
In 1 embodiment, side conveys above-mentioned resin base material, Bian Jinhang with the conveying roller being set in above-mentioned heating furnace
Heating.
In 1 embodiment, the angle of embrace of the conveying roller in above-mentioned heating furnace is 90 ° or more.
In 1 embodiment, the distance between centers of the conveying roller in above-mentioned heating furnace is 2m or less.
In 1 embodiment, above-mentioned manufacturing device has: uncoiling means are taken up from the resin base material of strip
The resin base material is wound off for resin base material made of web-like；Heating means has the resin base material for holding aforementioned strip
The stenter that is conveyed of both ends, and the aforementioned resin substrate that both ends have been held with the fixture of aforementioned stenter is heated
To -15 DEG C of the glass transition temperature (Tg) or more of the resin base material；Coating means, by the painting comprising polyvinyl alcohol resin
Cloth liquid is applied on heated resin base material.
In 1 embodiment, side conveys above-mentioned resin base material with above-mentioned stenter, while being heated.
The effect of invention
According to the present invention, by implementing the heat treatment of predetermined temperature or more to resin base material, resin base material can be mitigated
Concave-convex surface (for example, the sudden and violent muscle (gauge band) (homogenization) generated when batching resin base material.As a result, it is possible to
The excellent PVA resin of the homogeneity of thickness is formed on resin base material.Pass through the PVA that the homogeneity to such thickness is excellent
Resin implements various processing, can manufacture and not generate unevenness in performance (specifically film thickness, optical characteristics, appearance)
And the light polarizing film (such as sufficiently meeting quality required by LCD TV) that homogeneity is extremely excellent.
Detailed description of the invention
Fig. 1 is the schematic section of the laminated body based on 1 embodiment of the invention.
It (a) of Fig. 2 and (b) is the schematic diagram for illustrating the heating means of the resin base material based on 1 embodiment.
Fig. 3 is the schematic diagram for illustrating the heating means of the resin base material based on another embodiment.
Fig. 4 is the schematic diagram for showing an example of the invention.
Fig. 5 is the schematic diagram for illustrating the evaluation method of appearance of PVA resin.
Specific embodiment
Hereinafter, being illustrated to the preferred embodiment of the present invention, but the present invention is not limited to these embodiments.
A. laminated body
Fig. 1 is the schematic section of the laminated body based on 1 embodiment of the invention.Laminated body 10 is by resin
It is formed obtained from polyvinyl alcohol (PVA) resin 12 on substrate 11.
A-1. resin base material
Representative above-mentioned resin base material is to be made into strip.The thickness of resin base material is preferably 20 μm~300 μm, into
One step is preferably 50 μm~200 μm.
As the forming material of resin base material, for example: the esters such as PET series resin system
The olefin-based resins such as resin, cyclic olefine resin, polypropylene, (methyl) acrylic resin, polyamide resin, polycarbonate
It is resin, their copolymer resin etc..It is preferable to use PET series resins.It is wherein, it is preferable to use non-
The PET series resin of crystalloid.As the specific of amorphous PET series resin
Example, can enumerate: so include M-phthalic acid as dicarboxylic acids copolymer so that include cyclohexanedimethanol as glycol
Copolymer.
The glass transition temperature (Tg) of resin base material is preferably 170 DEG C or less.By using such resin base material, energy
The stretching of laminated body is realized at a temperature of the crystallization of PVA system resin not rapid progression, being able to suppress is caused by the crystallization
The unfavorable condition orientation of the PVA resin based on stretching (for example, interfere).On the other hand, the vitrifying of resin base material turns
Temperature is preferably 60 DEG C or more.It should be noted that glass transition temperature (Tg) is the value found out according to JIS K7121.
Resin base material is shaped by any suitable method.As manufacturing process, for example: melting extrusion
Method, melt casting (cast) method (melt the tape casting), rolling process, compression forming method etc..Among these, preferred molten extrusion molding.
Surface modification treatment (such as sided corona treatment etc.) can be implemented on resin base material surface, easy bonding can also be formed
Layer.Processing in this way can be improved the adaptation of resin base material Yu PVA resin.Surface modification treatment and/or easy to stick
The formation for connecing layer can be carried out before aftermentioned heat treatment, can also be carried out after a heating treatment.In addition, carrying out aftermentioned stretching
In the case where, it can carry out, can also be carried out before the stretching after the stretch.
In 1 embodiment, resin base material is stretched before aftermentioned heat treatment.Drawing as resin base material
Stretching method can use any suitable method.Specifically, can be stretched for fixing end, or free end stretches.Separately
It outside, can be simultaneously biaxial drawing, or gradually biaxial stretch-formed.The stretching of resin base material can be carried out with a stage,
The multistage can be divided to carry out.In the case where dividing the multistage to carry out, the stretching ratio of aftermentioned resin base material is the stretching of each stage
The product of multiplying power.It can be aerial stretching mode, or stretching mode in water in addition, stretching mode is not particularly limited.
It can be suitable for the draw direction for setting resin base material.For example, the resin base material of strip is stretched in the width direction.
Specifically, conveying resin base material along its length and being stretched along the direction (TD) orthogonal with its conveying direction (MD).
In the present specification, " orthogonal " is also comprising substantially orthogonal situation.Herein, " substantially orthogonal " is included as 90 ° ± 5.0 °
Situation, preferably 90 ° ± 3.0 °, further preferably 90 ° ± 1.0 °.By the way that resin base material is stretched in the width direction (TD),
Resin base material can be effectively utilized.In addition, the thickness of the TD of resin base material can be made uniform, inhibit aftermentioned local film thickness not
?.
For the draft temperature of resin base material, can be set as appointing according to forming material, the stretching mode etc. of resin base material
It anticipates value appropriate.Draft temperature is representative to be, the glass transition temperature (Tg) relative to resin base material is preferably Tg-10 DEG C
~Tg+80 DEG C.Use PET series resin as in the case where the forming material of resin base material, stretches temperature
Preferably 70 DEG C~150 DEG C, further preferably 90 DEG C~130 DEG C of degree.
The stretching ratio of resin base material is preferably 1.5 times or more relative to the raw footage of resin base material.By being set as in this way
Range, aftermentioned localized membrane thickness ununiformity can be inhibited well.On the other hand, the stretching ratio of resin base material is relative to resin base
The raw footage of material is preferably 3.0 times or less.By being set as such range, the pleat in aftermentioned heating process can be inhibited well
The generation of wrinkle.
A-2. it batches and saves
In 1 embodiment, the resin base material of above-mentioned strip is batched as web-like.It can be produced in resin base material forming
Raw localized membrane thickness ununiformity when being batched in this state, can generate concave-convex on resin base material.Coiling tension is representative to be
60N/m~150N/m (unit: N/m is the tension of the wide length of per unit).The resin base material (resin base material volume) batched is until quilt
Any suitable period supplied until connecing subsequent processing can directly save (placement) with the state batched.For example, setting
After the forming of aliphatic radical material, not (can not) be formed continuously above-mentioned PVA resin in the case where, resin base material is come with the state batched
Directly save.If the holding time is elongated (such as 3 days or more), concave-convex generation (the generation number of concave-convex degree bumps
Amount) become significant, it is uneven that the PVA resin (laminated body) having the tendency that generates film thickness.Therefore, the preservation of resin base material volume
Time is longer, can more obtain the effect based on aftermentioned heat treatment significantly.It should be noted that resin base material volume can be
It is saved under any suitable atmosphere.Storage temperature is, for example, 15 DEG C~35 DEG C.Relative humidity is, for example, 40%RH~80%RH.
A-3. it heats
Above-mentioned resin base material is heated.Specifically, passing through hot wind, infrared heater, roller heater etc. pair
Resin base material is heated.Heating temperature is -15 DEG C of the glass transition temperature (Tg) or more of resin base material, preferably Tg-10
DEG C or more, further preferably Tg-5 DEG C or more.Use PET series resin as resin base material
In the case where forming material, heating temperature is preferably 68 DEG C or more.By being heated at such temperatures to resin base material,
The concave-convex surface of (homogenization) resin base material can be mitigated.It, can as a result, it is possible to form aftermentioned PVA resin well
Form the excellent PVA resin of the homogeneity of thickness.On the other hand, heating temperature is preferably+15 DEG C of (Tg) following, further
Preferably Tg+10 DEG C or less.Use PET series resin as the feelings of the forming material of resin base material
Under condition, heating temperature is preferably 80 DEG C or less.By being heated at such temperatures to resin base material, can press down well
The generation of fold (hot fold) processed.
Heating time is preferably 70 seconds~150 seconds, further preferably 75 seconds~100 seconds.
Resin base material can be shunk because of heating.For example, the feelings for before heating having stretched resin base material in the width direction
Under condition, resin base material can shrink (TD contraction) in width direction due to heating.The shrinking percentage (TD shrinking percentage) of resin base material is preferred
It is 3% or less, further preferably 2% or less, particularly preferably 1.5% or less.In such range, the generation quilt of fold
Inhibit, excellent appearance can be obtained.It should be noted that TD shrinking percentage calculates according to the following formula.
TD shrinking percentage (%)={ 1- (resin base material width (W after heating1Resin base material width (W before)/heating0))}
×100
In 1 embodiment, heated when conveying resin base material.As described above, batching resin base material for volume
In the case where shape, heat treatment preferably is implemented to the resin base material for winding off volume from resin base material.As heating means, for example, can
To enumerate: be set in heating furnace conveying roller conveying resin base material method, while with stenter convey resin base material while into
The method of row heating.According to the former, it is able to suppress the enlargement of equipment.According to the latter, it can extremely well inhibit fold
It generates.
Particular instantiation when conveying roller will be used in (a) of Fig. 2 and (b) of Fig. 2.In illustrated example, dried using being set to
Free roll R2~R5 in furnace A conveys resin base material 11 along its length, thus heats to resin base material 11.From life
From the perspective of producing speed, as shown in the example of the figure, setting 4 or more free roll preferably in baker.
The angle of embrace of free roll in baker is preferably 90 ° or more.In the example that (a) of Fig. 2 is shown, by free roll R2 and
The angle of embrace θ of R5 is set as 90 °, the angle of embrace θ of free roll R3 and R4 is set as 180 °.It, will be free in the example that (b) of Fig. 2 is shown
The angle of embrace θ of roller R2~R5 is set as 90 °.By being set as such angle of embrace, the contraction of resin base material is suppressed, and is able to suppress fold
It generates.It should be noted that angle of embrace are as follows: when from cross-section observation free roll perpendicular to axis direction, connection free roll center
The central point and resin base material and free roll of the straight line of the contact start point of point and resin base material and free roll and connection free roll
Contact end point straight line formed by angle.The interval (distance between centers of roller) of free roll in baker is preferably 2m or less.
In addition, the interval for 2 free rolls being arranged in a manner of the entrance across baker (in illustrated example between R1-R2, between R5-R6)
Preferably also 2m or less.By being set as such interval, the contraction of resin base material is suppressed, and is able to suppress the generation of fold.It needs
It is noted that in the present embodiment, the contraction of resin base material is also with the stretching ratio of above-mentioned resin base material, heating temperature etc.
It is related.
The particular instantiation in the case where stenter will be used in Fig. 3.In illustrated example, with the fixture 21,21 of stenter or so
The both ends (on the line orthogonal with conveying direction) for holding resin base material 11 respectively, along its length with defined speed
It conveys in heating region, thus resin base material 11 is heated.(adjacent clip end is each other for distance between the fixture of conveying direction
Distance) be preferably 20mm or less, further preferably 10mm or less.Clamp jaw width be preferably 20mm or more, further preferably
For 30mm or more.In the present embodiment, such as the TD of resin base material can be controlled by adjusting distance between the fixture of left and right
It shrinks.Specifically, TD shrinking percentage is essentially 0% in the case where distance between not changing the fixture controlled moves it.
On the contrary, distance can be such that resin base material is stretched by TD between the fixture for passing through expansion left and right.The TD change rate of resin base material is preferably
1.00 times or more, further preferably 1.00 times~1.10 times.It should be noted that TD change rate calculates according to the following formula.
Resin base material width (W after TD change rate (again)=heating1Resin base material width (W before)/heating0)
The formation of A-4.PVA resin
As the PVA system resin for forming above-mentioned PVA resin, any suitable resin can be used.Such as it can lift
Out: polyvinyl alcohol, vinyl-vinyl alcohol copolymer.Polyvinyl alcohol is as will be obtained from saponifying polyvinyl acetate.Second
Alkene-vinylalcohol copolymer is as obtained from being saponified vinyl-vinyl acetate copolymer.The saponification degree of PVA system resin
Usually 85 moles of %~100 mole %, preferably 95.0 moles of %~99.95 mole %, it further preferably 99.0 rubs
You are %~99.93 mole %.Saponification degree can be found out according to JIS K6726-1994.By using such saponification degree
PVA system resin, can obtain the light polarizing film of excellent in te pins of durability.In the case that saponification degree is excessively high, there is the worry that gelation can occur.
The average degree of polymerization of PVA system resin can make appropriate choice according to purpose.Average degree of polymerization is usually 1000
It~10000, preferably 1200~4500, is more preferably 1500~4300.It should be noted that average degree of polymerization can root
It is found out according to JIS K6726-1994.
For PVA resin, preferably by the way that the coating fluid comprising PVA system resin to be coated on resin base material and carry out
It dries and is formed.Representative coating fluid is that above-mentioned PVA system resin is made to be dissolved in solution obtained from solvent.As solvent, example
Such as can be used water, dimethyl sulfoxide, dimethylformamide, dimethyl acetamide, N-Methyl pyrrolidone, various glycols,
The amines such as the polyalcohols such as trimethylolpropane, ethylene diamine, diethylenetriamines.They can be used alone, can also be with
It is applied in combination two or more.Among these, preferably water.The PVA system resin concentration of solution is preferred relative to 100 parts by weight of solvent
For 3 parts by weight~20 parts by weight.When for such resin concentration, the uniform coated film for being sealed at resin base material can be formed.
Also it may include additive in coating fluid.As additive, for example, plasticizer, surfactant etc..
As plasticizer, for example, the polyalcohols such as ethylene glycol, glycerol.As surfactant, for example, nonionic
Surfactant.For the homogeneity of the PVA resin further increased, dyeability, the purpose of draftability, can make
Use them.In addition, as additive, for example, easy bonding composition.By using easy bonding composition, resin can be improved
The adaptation of substrate and PVA resin.As a result, it is possible to inhibit such as PVA resin is from resin base material removing not
Good situation carries out aftermentioned dyeing well, stretches in water.As easy bonding composition, it is, for example, possible to use acetoacetyls to change
The modified PVAs such as property PVA.
As the coating method of coating fluid, any suitable method can be used.For example: rolling method, rotation
Rubbing method, bar rubbing method, dip coating, die coating method, curtain coating processes, spray coating method, scraper for coating method (comma rubbing method etc.) etc..
In 1 embodiment, using die coating method.In die coating method, make resin base material and die head (such as fountain coventry type die head coventry,
Slot die (slot die)) gap fix and applied coating solution, therefore the painting that the homogeneity that can obtain thickness is extremely excellent
Cloth film.On the other hand, in the case where generating concave-convex on resin base material, distance is inhomogenous between resin base material-die lip, can be difficult to shape
At uniform coated film.Therefore, in the case where using die coating method, the effect based on above-mentioned heat treatment can be obtained significantly.
Preferably become 3 μm~40 μm with the thickness of the PVA resin after drying, further preferably become 3 μm~20 μm
Mode be coated with above-mentioned coating fluid.The coating drying temperature of above-mentioned coating fluid is preferably 50 DEG C or more.
It is preferred that being formed continuously PVA resin after above-mentioned heating.For example, resin base material is not batched after the heating, and
PVA resin is formed on resin base material.This is because the effect based on above-mentioned heating can be obtained well.
It should be noted that before forming PVA resin, it can be the one of the formation PVA resin of resin base material
Side is pre-formed lower coating (priming coat).As the material for constituting priming coat, as long as can be to resin base material and PVA resin
The two plays the material of a degree of strong closing force, is just not particularly limited.Such as use the transparency, thermal stability, drawing
The excellent thermoplastic resin such as stretching property.As thermoplastic resin, for example: acrylic resin, polyolefin-based resins,
Polyester based resin, polyvinyl alcohol resin or their mixture.
A-5. other
In 1 embodiment, it is carried out continuously uncoiling (uncoiling process), the resin that resin base material is rolled up from above-mentioned resin base material
The heating (heating process) of substrate and the formation (PVA resin formation process) of PVA resin.According to such implementation
Mode can obtain the effect based on above-mentioned heat treatment well.As the concrete example of present embodiment, can enumerate such as figure
Uncoiling, heating and PVA resin shape are successively carried out in a series of production lines of the resin base material of conveying strip shown in 4
At the mode of process.Have in laminated body producing device 100 shown in Fig. 4: for rolling up resin base material 11 from resin base material
The unwinding roll 40 of 30 uncoilings, the heating device 50 that resin base material 11 is heated, the painting for that will include above-mentioned PVA system resin
Cloth liquid is coated on apparatus for coating 60 on the surface of resin base material 11, by the dry drying device 70 of the coating fluid of coating and
For batching the work beam 80 of laminated body 10.In addition, having multiple conveying rollers 90 in laminated body producing device 100.
B. laminated body is stretched
Stretching laminated body of the invention is made by being stretched to above-mentioned laminated body.In 1 embodiment, stretch
Laminated body by using aerial stretching mode with 1.5 times of stretching ratio or more and 3.0 times or less stretch above-mentioned laminated body and make.
The details of drawing process about laminated body, as be described hereinafter.Stretch laminated body in PVA resin 200mm (MD) ×
Film thickness in the size of 200mm (TD) is not both preferably 0.25 μm or less, further preferably 0.20 μm or less.Stretch laminated body
Slow axis in the 200mm (MD) of middle PVA resin × 200mm (TD) size be not both preferably 0.50 ° or less, it is further excellent
It is selected as 0.30 ° or less, particularly preferably 0.25 ° or less.
C. light polarizing film
Light polarizing film of the invention by implement for by the PVA resin of above-mentioned laminated body be made the processing of light polarizing film come
Production.
As the processing for above-mentioned light polarizing film to be made, for example: dyeing processing, stretch processing, insoluble place
Reason, crosslinking Treatment, cleaning treatment, drying process.It can be suitable for these processing of selection according to purpose.Furthermore it is possible to be suitable for setting
Processing sequence, the opportunity of processing, number of processes etc..Hereinafter, being illustrated to various processing.
(dyeing processing)
Representative above-mentioned dyeing processing is carried out by being dyed with dichroic substance to PVA resin.It is excellent
Gating carries out PVA resin absorption dichroic substance.As the adsorption method, for example, following method:
PVA resin (laminated body) is impregnated in the method for the dyeing liquor comprising dichroic substance, applies and is somebody's turn to do on PVA resin
The method of dyeing liquor, method that the dyeing liquor is sprayed to PVA resin etc..Preferably laminated body is made to be impregnated in dyeing liquor
Method.This is because dichroic substance can be adsorbed well.
As above-mentioned dichroic substance, for example, iodine, organic dyestuff.They can be used alone, can also group
It closes using two or more.Dichroic substance is preferably iodine.Use iodine as in the case where dichroic substance, above-mentioned dyeing liquor is preferred
For iodine aqueous solution.The compounding amount of iodine is preferably 0.05 parts by weight~5.0 parts by weight relative to 100 parts by weight of water.In order to improve iodine
Relative to the solubility of water, iodide are preferably compounded in iodine aqueous solution.As iodide, for example: potassium iodide, iodine
Change lithium, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide etc..These it
In, preferably potassium iodide.The compounding amount of iodide is preferably 0.3 parts by weight~15 parts by weight relative to 100 parts by weight of water.
Liquid temperature when the dyeing of dyeing liquor is preferably 20 DEG C~40 DEG C.The case where making PVA resin be impregnated in dyeing liquor
Under, dip time is preferably 10 seconds~300 seconds.When for such condition, PVA resin can be made sufficiently to adsorb dichroism object
Matter.Furthermore it is possible to be set in such a way that the degree of polarization of finally obtained light polarizing film or singleton transmittance become defined range
Dyeing condition (concentration, liquid temperature, dip time).In 1 embodiment, with the degree of polarization of obtained light polarizing film for 99.98%
Above mode sets dip time.In another embodiment, with the singleton transmittance of obtained light polarizing film for 40% or so
Mode set dip time.
(stretch processing)
As the drawing process of laminated body, any suitable method can be used.Specifically, can be stretched for fixing end
(such as method using tentering stretching-machine), or free end stretching (such as keep laminated body different by peripheral speed
The method being uniaxially stretched between roller).Furthermore it is possible to for simultaneously biaxial drawing (such as the side using simultaneously biaxial drawing machine
Method), or it is gradually biaxial stretch-formed.The stretching of laminated body can be carried out with a stage, and the multistage can also be divided to carry out.Divide more
In the case that stage carries out, the stretching ratio (maximum tension multiplying power) of aftermentioned laminated body is the product of the stretching ratio in each stage.
Stretch processing can be stretching mode in the water carried out when laminated body to be immersed in stretch bath, or empty
Middle stretching mode.Preferably at least implement stretch processing in 1 water, in further preferred combination water at stretch processing and aerial stretching
Reason.It, can (representative be 80 in the glass transition temperature than above-mentioned resin base material, PVA resin when using being stretched in water
DEG C or so) it is low at a temperature of stretched, can inhibit PVA resin crystallization in the case where high magnification stretch.It is tied
Fruit can manufacture the light polarizing film with excellent optical characteristics (such as degree of polarization).
As the draw direction of laminated body, any suitable direction can choose.In 1 embodiment, along strip
The length direction of laminated body stretched.Specifically, conveying laminated body along its length, draw direction is its conveying direction
(MD).In another embodiment, the width direction along the laminated body of strip is stretched.Specifically, by laminated body edge
Length direction conveying, draw direction are the direction (TD) orthogonal with its conveying direction (MD).
The draft temperature of laminated body can be set as any suitable according to forming material, the stretching mode etc. of resin base material
Value.In the case where aerial stretching mode, draft temperature be preferably the glass transition temperature (Tg) of resin base material or more, into
One step is preferably+10 DEG C of glass transition temperature (Tg) of resin base material or more, particularly preferably Tg+15 DEG C or more.Another party
Face, the draft temperature of laminated body are preferably 170 DEG C or less.By being stretched at such temperatures, it is able to suppress PVA system tree
The crystallization rapid progression of rouge, thus inhibition unfavorable condition as caused by the crystallization (such as interfere the PVA system tree based on stretching
The orientation of rouge layer).
Using stretching mode in water as stretching mode in the case where, the liquid temperature of stretch bath is preferably 40 DEG C~85 DEG C, more
Preferably 50 DEG C~85.When at such temperatures, it is able to suppress the dissolution of PVA resin, and drawn with high magnification
It stretches.Specifically, as described above, the glass transition temperature (Tg) of the resin base material just relationship with the formation of PVA resin
For, preferably 60 DEG C or more.In this case, if draft temperature is lower than 40 DEG C, even if considering the resin base based on water
The plasticized of material also has the worry that can not be stretched well.On the other hand, the temperature of stretch bath is higher, PVA resin
Dissolubility become higher, have the worry for being unable to get excellent optical characteristics.
In the case where using stretching mode in water, it is impregnated in laminated body in boric acid aqueous solution and is stretched (boric acid
It is stretched in water).By using boric acid aqueous solution as stretch bath, apply when can assign resistance to Tensile to PVA resin
The rigidity of tension and the water resistance for being not dissolved in water.Specifically, boric acid generate tetrahydroxy acid anion in aqueous solution and
It is crosslinked with PVA system resin by hydrogen bond.As a result, it is possible to assign rigidity and water resistance to PVA resin, thus well
Ground is stretched, and the light polarizing film with excellent optical characteristics can be made.
Above-mentioned boric acid aqueous solution is preferably obtained and being dissolved in boric acid and/or borate in the water as solvent.Boron
Acid concentration is preferably 1 parts by weight~10 parts by weight relative to 100 parts by weight of water.By the way that boric acid concentration is set as 1 parts by weight or more,
The dissolution of PVA resin can be effectively inhibited, the light polarizing film of higher characteristic can be made.It should be noted that removing boric acid
Or other than borate, also can be used the boron compounds such as borax, glyoxal, glutaraldehyde etc. are dissolved in it is water-soluble obtained from solvent
Liquid.
It is preferred that being compounded iodide in above-mentioned stretch bath (boric acid aqueous solution).By being compounded iodide, it is able to suppress absorption
In the dissolution of the iodine of PVA resin.The concrete example of iodide is for example above-mentioned.The concentration of iodide is excellent relative to 100 parts by weight of water
It is selected as 0.05 parts by weight~15 parts by weight, more preferably 0.5 parts by weight~8 parts by weight.
Dip time of the laminated body in stretch bath is preferably 15 seconds~5 minutes.
Raw footage of the stretching ratio (maximum tension multiplying power) of laminated body relative to laminated body, it is representative be 4.0 times with
Above, preferably 5.0 times or more.Such high stretching ratio (can for example be drawn by using stretching mode in water in boric acid water
Stretch) and realize.It should be noted that in the present specification, " maximum tension multiplying power " refers to the drawing before laminated body will be broken
Multiplying power is stretched, confirms the stretching ratio of laminated body fracture, in addition for the value for being worth low 0.2 than it.
Preferably, stretch processing carries out after dyeing processing in water.
(insoluble processing)
Representative above-mentioned insoluble processing is carried out by making PVA resin be impregnated in boric acid aqueous solution.Especially
It is to use in water in the case where stretching mode, is implemented by implementing insoluble processing, PVA resin can be assigned water-fast
Property.The concentration of the boric acid aqueous solution is preferably 1 parts by weight~4 parts by weight relative to 100 parts by weight of water.Insoluble bath (boric acid water
Solution) liquid temperature be preferably 20 DEG C~50 DEG C.Preferably, insoluble processing is after laminated body production and in dyeing processing, water
It is carried out before stretch processing.
(crosslinking Treatment)
Representative above-mentioned crosslinking Treatment is carried out by making PVA resin be impregnated in boric acid aqueous solution.Pass through reality
Crosslinking Treatment is applied, water resistance can be assigned to PVA resin.The concentration of the boric acid aqueous solution is excellent relative to 100 parts by weight of water
It is selected as 1 parts by weight~4 parts by weight.In addition, preferably and then being compounded iodine in the case where carrying out crosslinking Treatment after above-mentioned dyeing processing
Compound.By being compounded iodide, it is able to suppress the dissolution for being adsorbed in the iodine of PVA resin.The compounding amount of iodide relative to
100 parts by weight of water are preferably 1 parts by weight~5 parts by weight.The concrete example of iodide is as described above.Crosslinking bath (boric acid aqueous solution)
Liquid temperature is preferably 20 DEG C~50 DEG C.Preferably, stretch processing carries out crosslinking Treatment before in water.In preferred embodiment
In, successively carry out dyeing processing, stretch processing in crosslinking Treatment and water.
(cleaning treatment)
Representative above-mentioned cleaning treatment is carried out by making PVA resin be impregnated in potassium iodide aqueous solution.
(drying process)
The drying temperature of drying process is preferably 30 DEG C~100 DEG C.
Obtained light polarizing film is essentially the PVA resin film for being adsorbed with dichroic substance and being orientated.Light polarizing film
Thickness be preferably 15 μm or less, more preferably 10 μm or less, be more preferably 7 μm hereinafter, particularly preferably 5 μm or less.
Such light polarizing film can inhibit the generation of crackle etc. in environmental test (such as 80 DEG C of environmental tests).On the other hand, polarisation
The thickness of film is preferably 0.5 μm or more, more preferably 1.0 μm or more.The transporting that such light polarizing film waits during fabrication can pole
Its is excellent.
Light polarizing film shows absorption dichroism under any wavelength preferably in wavelength 380nm~780nm.Light polarizing film is preferred
In 42% or more singleton transmittance, degree of polarization is 99.9% or more.
D. polarizer
Polarizer of the invention has above-mentioned light polarizing film.Preferably, polarizer has above-mentioned light polarizing film and is configured at this
At least unilateral protective film of light polarizing film.As the protective film, above-mentioned resin base material can be directly used, also can be used
The film different from above-mentioned resin base material.As the forming material of protective film, for example: (methyl) acrylic acid series tree
The olefin-based resins such as the cellulose-based resins such as rouge, cellulose diacetate, cellulose triacetate, cyclic olefine resin, polypropylene are gathered
The esters system such as ethylene glycol terephthalate system resin resin, polyamide resin, polycarbonate-based resin, their copolymer resin
Rouge etc..The thickness of protective film is preferably 10 μm~100 μm.
As described above, in 1 embodiment, not by above-mentioned resin base material from polarisation film stripping, and directly using its work
For protective film.In another embodiment, from polarisation film stripping and another film is laminated in above-mentioned resin base material.For protection
Film can be laminated in light polarizing film by adhesive layer, can also be made its closely sealed (not by adhesive layer) and be laminated.Adhesive layer generation
Table is formed by bonding agent or adhesive.According to the present invention, the extremely excellent light polarizing film of the homogeneity of thickness is obtained, therefore
Stacking of the protective film to light polarizing film can be carried out well.
[embodiment]
Hereinafter, by embodiment, specifically the present invention will be described, but the present invention is not limited to embodiments.
[embodiment 1-1]
(production of laminated body)
It will be by water absorption rate 0.75%, amorphous isophthalic diformazan of 75 DEG C of glass transition temperature (Tg) with tension 100N/m
Acid copolymerization polyethylene terephthalate (IPA be copolymerized PET) constitutes, in advance at 115 DEG C TD be stretched as 2.0 times, strip
The resin base material that 100 μm of shape thickness batches as web-like and resin base material volume is made, in the state of batching, 25 DEG C, it is relatively wet
It is saved 30 days under degree 60%RH environment.
Then, volume resin base material is wound off from resin base material, implemented at 60 seconds heat at 70 DEG C when conveying resin base material
Reason.
Then, sided corona treatment is implemented to the single side of resin base material.It will be with the ratio of 9:1 comprising poly- using die coating method at 25 DEG C
Vinyl alcohol (99.2 moles of degree of polymerization 4200, saponification degree %) and acetoacetyl modified PVA (degree of polymerization 1200, acetoacetyl
Modification degree 4.6%, 99.0 moles of % or more of saponification degree, the Nippon Synthetic Chemical Industry Co., Ltd's system, trade name " Gohsefimer
Z200 ") aqueous solution be coated on the sided corona treatment face after, dry 200 seconds at 60 DEG C, form 10 μm of thickness of PVA system tree
Rouge layer makes laminated body.
(production of light polarizing film)
Resulting laminated body is carried out freely along its length in 115 DEG C of baking oven, between the different roller of peripheral speed
End is uniaxially stretched to 2.0 times (aerial to stretch).
Then, make laminated body 30 DEG C of liquid temperature insoluble bath (relative to 100 parts by weight of water be compounded 3 parts by weight of boric acid and
Obtained boric acid aqueous solution) in impregnate 30 seconds (insoluble processing).
Then, side adjustment iodine concentration, dip time so that obtained light polarizing film singleton transmittance (Ts) be 40% hereinafter,
While the dye bath (being compounded iodine aqueous solution obtained from iodine and potassium iodide in water with weight ratio 1:7) for making it be impregnated in 30 DEG C of liquid temperature
In (dyeing processing).
Then, it is made (to be compounded 3 parts by weight of potassium iodide, boric acid 3 relative to 100 parts by weight of water in 30 DEG C of liquid temperature of crosslinking bath
Boric acid aqueous solution obtained from parts by weight) 30 seconds (crosslinking Treatment) of middle dipping.
Then, while the boric acid aqueous solution for making laminated body be impregnated in 70 DEG C of liquid temperature (is compounded boric acid 4 relative to 100 parts by weight of water
Aqueous solution obtained from parts by weight, 5 parts by weight of potassium iodide) in, while being carried out along its length between the different roller of peripheral speed single
Axis is stretched to 2.7 times (stretching in water).
Then, make laminated body 30 DEG C of liquid temperature cleaner bath (relative to 100 parts by weight of water be compounded 4 parts by weight of potassium iodide and
Obtained aqueous solution) in dipping after 10 seconds, make its dry 60 seconds (cleaning-drying operation) under 60 DEG C of hot wind.
It operates in this way, forms 5 μm of thickness of light polarizing film on resin base material.
[embodiment 1-2]
When making laminated body, the temperature of heat treatment is set as 75 DEG C, in addition to this, is operated in the same way with embodiment 1-1,
Light polarizing film is formed on resin base material.
[embodiment 1-3]
When making laminated body, the temperature of heat treatment is set as 80 DEG C, in addition to this, is operated in the same way with embodiment 1-1,
Light polarizing film is formed on resin base material.
[embodiment 1-4]
When making laminated body, the temperature of heat treatment is set as 90 DEG C, in addition to this, is operated in the same way with embodiment 1-1,
Light polarizing film is formed on resin base material.
[embodiment 1-5]
When making laminated body, the temperature of heat treatment is set as 100 DEG C, in addition to this, is operated in the same way with embodiment 1-1,
Light polarizing film is formed on resin base material.
[embodiment 2-1]
(production of laminated body)
It is operated in the same way with embodiment 1-1, makes laminated body.
(formation of light polarizing film)
With tentering stretching-machine, it is uniaxially stretched resulting laminated body under 115 DEG C of heating by free end along width side
To being stretched to 4.0 times (stretch processings).
Then, make laminated body 30 DEG C of liquid temperature insoluble bath (relative to 100 parts by weight of water be compounded 3 parts by weight of boric acid and
Obtained boric acid aqueous solution) in impregnate 30 seconds (insoluble processing).
Then, side adjustment iodine concentration, dip time so that obtained light polarizing film singleton transmittance (Ts) be 40% hereinafter,
While the dye bath (being compounded iodine aqueous solution obtained from iodine and potassium iodide in water with weight ratio 1:7) for making it be impregnated in 30 DEG C of liquid temperature
In (dyeing processing).
Then, it is made (to be compounded 3 parts by weight of potassium iodide, boric acid 3 relative to 100 parts by weight of water in 30 DEG C of liquid temperature of crosslinking bath
Boric acid aqueous solution obtained from parts by weight) 30 seconds (crosslinking Treatment) of middle dipping.
Then, make laminated body 30 DEG C of liquid temperature cleaner bath (relative to 100 parts by weight of water be compounded 4 parts by weight of potassium iodide and
Obtained aqueous solution) in dipping after 10 seconds, make its dry 60 seconds (cleaning-drying operation) under 60 DEG C of hot wind.
It operates in this way, forms 2.5 μm of thickness of light polarizing film on resin base material.
[embodiment 2-2]
When making laminated body, the temperature of heat treatment is set as 75 DEG C, in addition to this, is operated in the same way with embodiment 2-1,
Light polarizing film is formed on resin base material.
[embodiment 2-3]
When making laminated body, the temperature of heat treatment is set as 100 DEG C, in addition to this, is operated in the same way with embodiment 2-1,
Light polarizing film is formed on resin base material.
[comparative example 1-1]
When making laminated body, not firm heat applying treatment operates in the same way, on resin base material in addition to this with embodiment 1-1
Form light polarizing film.
[comparative example 1-2]
When making laminated body, the temperature of heat treatment is set as 50 DEG C, in addition to this, is operated in the same way with embodiment 1-1,
Light polarizing film is formed on resin base material.
[comparative example 1-3]
When making laminated body, the temperature of heat treatment is set as 55 DEG C, in addition to this, is operated in the same way with embodiment 1-1,
Light polarizing film is formed on resin base material.
[comparative example 2-1]
When making laminated body, the temperature of heat treatment is set as 55 DEG C, in addition to this, is operated in the same way with embodiment 2-1,
Light polarizing film is formed on resin base material.
(evaluation)
To each Examples and Comparative Examples, conduct the following evaluation.
1. film thickness is uneven
Simultaneously with Otsuka Electronics Co., Ltd. system " MCPD3000 " measurement (I) painting polyethylene alcohol solution
The film thickness of PVA resin after drying (before stretching) and after (II) stretching in the air.Part comprising defective part (was had sudden and violent originally
The part of muscle) it is cut into 200mm (MD) × 200mm (TD) size, as measurement sample, in MD, TD with 1mm spacing to its film
Measurement, the difference of maximum film thickness and minimum thickness to defective part are evaluated in thick carry out face.
2. slow axis unevenness absorption axiss are uneven
After being measured (I) painting polyethylene alcohol solution with Axometrics corporation " Axoscan " and dried (before stretching)
The slow-axis direction of PVA resin, (II) in the air stretch after PVA resin slow-axis direction and (III) light polarizing film
Absorb axis direction.200mm (MD) × 200mm (TD) size is cut into part comprising defective part, as measurement sample, measurement
The maximum axis direction in the defects of face portion is poor.It should be noted that making PVA system resin by adhesive phase about (I) and (II)
After layer fits in glass plate, resin base material is removed, measures the slow axis of PVA resin.
3. appearance
PVA resin, (II) after visually observing (I) painting polyethylene alcohol solution and drying (before stretching) are drawn in the air
The appearance of PVA resin and (III) light polarizing film after stretching.
About (I) and (II), as shown in (a) of Fig. 5, commercially available polarizer is overlapped with respectively up and down in laminated body (sample)
In the state of, irradiation light from below, from visually being carried out from top.At this point, configuring 2 in the orthogonal mode of mutual absorption axiss
Polarizer is configured in the mode that the draw direction of laminated body is orthogonal with the absorption axiss of the polarizer of downside.
About (III), as shown in (b) of Fig. 5, in the state of overlapping with commercially available polarizer under laminated body (sample),
Irradiation light from below, from visually being carried out from top.At this point, with the polarizer of the absorption axiss of the light polarizing film of laminated body and downside
The orthogonal mode of absorption axiss is configured.
It should be noted that evaluation criteria shown in table 1 is as follows.
Zero: not seeing the unevenness of defective part
×: the unevenness in visual defects portion
4. degree of polarization
Using spectrophotometer (Murakami Color Research Laboratory system, ProductName " Dot-41 "),
Singleton transmittance (Ts), parallel transmitance (Tp) and the orthogonal transmitance (Tc) for measuring light polarizing film, find out degree of polarization by following formula
(P).It should be noted that these transmitances are to be measured by 2 degree of visual fields (illuminant-C) of JISZ8701 and carried out visibility
The Y value of correction.
Degree of polarization (P)={ (Tp-Tc)/(Tp+Tc) }1/2×100
[table 1]
In embodiment, at all time points, the film thickness unevenness and slow axis unevenness absorption axiss unevenness quilt of PVA resin
Inhibit.In addition, appearance is also excellent.It should be noted that visual confirmation has arrived the production of fold in embodiment 1-5 and embodiment 2-3
It is raw.Think that it is as caused by the hot fold generated on resin base material by heat treatment.
Industrial availability
Light polarizing film of the invention is suitable for such as image display device.Specifically, being suitable for use as LCD TV, liquid crystal
Display, mobile phone, digital camera, DV, portable game machine, vehicle mounted guidance, duplicator, printer, fax
Liquid crystal display panel, antireflection plate of organic el device of machine, clock and watch, micro-wave oven etc. etc..
Description of symbols
10 laminated bodies
11 resin base materials
12 polyvinyl alcohol (PVA) resin
Claims (15)
1. a kind of manufacturing method of laminated body, successively includes following process:
The uncoiling process that resin base material made of web-like winds off volume is taken up as from the resin base material of strip；
The process that the resin base material of uncoiling is heated to -15 DEG C of glass transition temperature (Tg) of the resin base material or more；
Implement the process of sided corona treatment to the surface of the resin base material；
Coating forms coated film comprising the coating fluid of polyvinyl alcohol resin on the resin base material for implementing the sided corona treatment,
The resin base material for foring the coated film, the process that the dry coated film forms polyvinyl alcohol resin layer are not stretched.
2. the manufacturing method according to claim 1, wherein after saving in the state of described batch, carry out the heating
Process.
3. manufacturing method according to claim 1 or 2, wherein be carried out continuously the uncoiling process, the heating process,
The sided corona treatment and the polyvinyl alcohol resin layer formation process.
4. manufacturing method according to any one of claim 1 to 3, wherein in the glass transition of the resin base material
+ 15 DEG C of temperature (Tg) or less carries out the heating process.
5. manufacturing method according to any one of claim 1 to 4, wherein the side conveying roller being set in heating furnace
The resin base material is conveyed, side carries out the heating process.
6. manufacturing method according to claim 5, wherein the angle of embrace of the conveying roller in the heating furnace is 90 ° or more.
7. manufacturing method according to claim 5 or 6, wherein the distance between centers of the conveying roller in the heating furnace is
2m or less.
8. manufacturing method according to any one of claim 1 to 4, wherein while the resin base material is conveyed with stenter,
Side carries out the heating process.
9. manufacturing method according to any one of claim 1 to 8, wherein the receipts of the resin base material based on the heating
Shrinkage is 3% or less.
10. manufacturing method according to any one of claim 1 to 9, wherein the resin base material is by poly terephthalic acid
Glycol ester system resin is formed.
11. manufacturing method according to any one of claim 1 to 10, wherein the resin base material is stretched.
12. manufacturing method according to any one of claim 1 to 11, wherein the polyvinyl alcohol resin layer is logical
It crosses and the coating fluid comprising polyvinyl alcohol resin is coated on the resin base material using die coating method and is made it dry and is formed
's.
13. a kind of manufacturing method of light polarizing film is used and is obtained by manufacturing method described in any one of claims 1 to 12
Laminated body.
14. the manufacturing method of light polarizing film according to claim 13, wherein including the work stretched to the laminated body
Sequence.
15. a kind of manufacturing method of polarizer comprising obtained by manufacturing method described in claim 13 or 14 it is inclined
The process of protective film is laminated on light film.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2014-145574 | 2014-07-16 | ||
| JP2014145574 | 2014-07-16 | ||
| JP2015004658A JP6109862B2 (en) | 2014-07-16 | 2015-01-14 | Manufacturing method of laminate |
| JP2015-004658 | 2015-01-14 | ||
| CN201580038875.3A CN106537196B (en) | 2014-07-16 | 2015-02-04 | Method for producing laminate |
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| CN201580038875.3A Division CN106537196B (en) | 2014-07-16 | 2015-02-04 | Method for producing laminate |
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| CN201580038875.3A Active CN106537196B (en) | 2014-07-16 | 2015-02-04 | Method for producing laminate |
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| JP (1) | JP6109862B2 (en) |
| KR (4) | KR102450442B1 (en) |
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| CN105729962B (en) * | 2014-12-24 | 2018-01-05 | 住友化学株式会社 | The manufacture method of polarizing coating, polarizer and polarizing coating |
| CN105223639B (en) * | 2015-11-16 | 2019-06-25 | 云南云天化股份有限公司 | The preparation method of slim Pva Polarizing Film |
| JP2017173793A (en) * | 2016-03-22 | 2017-09-28 | 住友化学株式会社 | Polarizer, polarization film, and method for producing polarizer |
| CN107219583B (en) * | 2016-03-22 | 2021-12-03 | 住友化学株式会社 | Polarizing plate, polarizing film, and method for producing polarizing plate |
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| JP2012058383A (en) * | 2010-09-07 | 2012-03-22 | Nitto Denko Corp | Method for producing thin polarizing film |
| CN102753276A (en) * | 2010-03-31 | 2012-10-24 | 住友化学株式会社 | Method for producing laminate film, method for producing polarizing laminate film, and method for producing polarizing plate |
| JP2014016450A (en) * | 2012-07-09 | 2014-01-30 | Sumitomo Chemical Co Ltd | Method for manufacturing polarizing plate |
| JP2014074786A (en) * | 2012-10-04 | 2014-04-24 | Nitto Denko Corp | Method for manufacturing stretched laminate |
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| JP4661504B2 (en) * | 2005-09-29 | 2011-03-30 | 富士フイルム株式会社 | Thermoplastic resin film and method for producing the same |
| JP2008122502A (en) * | 2006-11-09 | 2008-05-29 | Sumitomo Chemical Co Ltd | Method of manufacturing polarizing plate |
| JP4651054B2 (en) * | 2008-04-11 | 2011-03-16 | 日東電工株式会社 | Manufacturing method of polarizer and wet stretching apparatus used therefor |
| JP2012003173A (en) * | 2010-06-21 | 2012-01-05 | Sumitomo Chemical Co Ltd | Polarization film and manufacturing method of polarizer |
| JP5563412B2 (en) * | 2010-09-07 | 2014-07-30 | 日東電工株式会社 | Manufacturing method of thin polarizing film |
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| CN102753276A (en) * | 2010-03-31 | 2012-10-24 | 住友化学株式会社 | Method for producing laminate film, method for producing polarizing laminate film, and method for producing polarizing plate |
| JP2012058383A (en) * | 2010-09-07 | 2012-03-22 | Nitto Denko Corp | Method for producing thin polarizing film |
| JP2014016450A (en) * | 2012-07-09 | 2014-01-30 | Sumitomo Chemical Co Ltd | Method for manufacturing polarizing plate |
| JP2014074786A (en) * | 2012-10-04 | 2014-04-24 | Nitto Denko Corp | Method for manufacturing stretched laminate |
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| Publication number | Publication date |
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| CN109910410B (en) | 2021-01-08 |
| KR20220093005A (en) | 2022-07-04 |
| TWI660846B (en) | 2019-06-01 |
| KR102450442B1 (en) | 2022-10-06 |
| KR20210031544A (en) | 2021-03-19 |
| CN106537196B (en) | 2020-02-07 |
| KR102580445B1 (en) | 2023-09-21 |
| TW201919909A (en) | 2019-06-01 |
| KR20220092637A (en) | 2022-07-01 |
| KR102450433B1 (en) | 2022-10-05 |
| JP6109862B2 (en) | 2017-04-05 |
| CN106537196A (en) | 2017-03-22 |
| TWI693156B (en) | 2020-05-11 |
| JP2016028875A (en) | 2016-03-03 |
| WO2016009663A1 (en) | 2016-01-21 |
| KR20170039191A (en) | 2017-04-10 |
| TW201604016A (en) | 2016-02-01 |
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