CN104395789A - Preparing method for thin polarizer, thin polarizer and polarizing plate manufactured by using the same - Google Patents

Preparing method for thin polarizer, thin polarizer and polarizing plate manufactured by using the same Download PDF

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Publication number
CN104395789A
CN104395789A CN201480000906.1A CN201480000906A CN104395789A CN 104395789 A CN104395789 A CN 104395789A CN 201480000906 A CN201480000906 A CN 201480000906A CN 104395789 A CN104395789 A CN 104395789A
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China
Prior art keywords
film
polyvinyl alcohol
pva
oriented
orientation
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CN201480000906.1A
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Chinese (zh)
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CN104395789B (en
Inventor
南星铉
郑棕炫
罗钧日
柳惠珉
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Shanjin Optoelectronics Nanjing Co Ltd
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LG Chemical Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • G02B5/3025Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033Polarisers, 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
    • G02B5/3041Polarisers, 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
    • G02B5/305Polarisers, 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 including organic materials, e.g. polymeric layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/08Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/36Layered products comprising a layer of synthetic resin comprising polyesters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/40Properties of the layers or laminate having particular optical properties
    • B32B2307/402Coloured
    • B32B2307/4026Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00Electrical equipment
    • B32B2457/20Displays, e.g. liquid crystal displays, plasma displays

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to a method for manufacturing a thin polarizer. The method comprises the steps of: forming a film laminate by adhering an unstretched polyvinyl alcohol-based film by means of an attractive force or an adhesive layer between at least two unstretched polymer films; stretching the film laminate so that the polyvinyl alcohol-based films have a thickness of 10 [mu]m or less after the stretching; and separating the polymer films and the polyvinyl alcohol-based films from the stretched film laminate.

Description

The manufacture method of film polarizer, and the film polarizer and the polarization plates that use the method manufacture
Technical field
The present invention relates to a kind of manufacture method of film polarizer and use film polarizer and the polarization plates of the method manufacture, and more specifically, relate to a kind of method with the manufacture of the film polarizer of the reduction thickness of 10 μm or less, and use film polarizer and the polarization plates of the method manufacture.
Background technology
The polaroid used in polarization plates is the optical devices that natural light or elective polarized light can be made to be transformed into the polarized light with certain party tropism, and uses widely in display device is as liquid crystal indicator and organic light-emitting display device (OLED).The polaroid used in a display device at present, has usually used and has comprised based on the compound of iodine or dichroic dye and have the polarizing coating based on polyvinyl alcohol (PVA) (PVA) of the strand arranged in a predetermined direction.
Based on polyvinyl alcohol (PVA) polarizing coating usually by with iodine or dichroic dye dyeing based on the method manufacture of the film of polyvinyl alcohol (PVA), then orientation and crosslinked in a predetermined direction.In the case, the wet orientation process that this orientation process can be undertaken by the solution used as boric acid aqueous solution or iodine aqueous solution or the dry orientation process of carrying out in atmospheric environment are carried out, orientation magnification normally 5 or more times.But, there is not breakage according to correlation technique to carry out orientation process in described manufacturing process, before described orientation process is carried out, needing to have the film based on polyvinyl alcohol (PVA) that thickness is greater than 60 μm.Before described orientation process, when the film based on polyvinyl alcohol (PVA) has 60 μm or less thickness, degree of expansion based on the film of polyvinyl alcohol (PVA) may increase, and may increase due to the thickness per unit area elastic modulus relatively reduced, in orientation process, easily occur such breakage.
On the other hand, according to trend very thin in a display device recently, polarization plates is also needed to have the thickness relatively reduced.But, before described orientation process is carried out, when use there is the film based on polyvinyl alcohol (PVA) of thickness more than 60 μm time, as when as described in correlation technique, reduce the finite thickness of polaroid.Therefore, carried out manufacturing the research with the polaroid relatively reducing thickness.
Published publication number is a kind of method that the Korean Patent of 2010-0071998 discloses that use manufactures film polarization plates by the stacked body forming material and the manufacture of hydrophilic polymer layer formation material with hydrophilic polymer layer coating basic unit or coextrusion basic unit.But, when rubbing method and coetrusion, because be not easy to be separated polyvinyl alcohol layer from described basic unit after carrying out described orientation process, and, relatively high peel strength is needed, the problem such as described polyvinyl alcohol layer damage or distortion during described separating technology can be appeared at for it is separated.Therefore, the degree of polarization etc. of physical optical properties as polyvinyl alcohol film may be reduced.In addition, when using described rubbing method or described coetrusion, because then extrude this polyvinyl alcohol resin by polyethylene dissolving alcohol resin or prepare coating solution and the scheme applying this solution manufactures polyvinyl alcohol film, according to extrusion condition, application conditions or appear the physical property that (unveiling) condition easily can change manufactured polyvinyl alcohol film.Therefore, there is when the physical property deterioration of the polyvinyl alcohol film manufactured thus the difficulty realizing homogeneous physical property.
Summary of the invention
Technical matters
The thickness that some embodiments of the present invention can provide a kind of manufacture to have reduction relatively has the method for the polaroid of fabulous technology stability and optical property simultaneously.
Technical scheme
According to certain embodiments of the present invention, the manufacture method of film polarizer can comprise: use attractive force or adhesive phase to be incorporated into by the film based on polyvinyl alcohol (PVA) of non-oriented and to sandwich between two or more non-oriented polymer films and form film laminated body, film laminated body described in orientation so that the film based on polyvinyl alcohol (PVA) has 10 μm or less thickness, and described in the described polymer film of film laminated body and the described film based on polyvinyl alcohol (PVA) are separated from each other.
Described film laminated body can comprise the first non-oriented polymer film, be incorporated into the first non-oriented of described first non-oriented polymer film based on the film of polyvinyl alcohol (PVA) be incorporated into the second non-oriented polymer film of described first non-oriented based on the film of polyvinyl alcohol (PVA).
Described film laminated body can comprise the first non-oriented polymer film, be incorporated into the film of the first non-oriented based on polyvinyl alcohol (PVA) of described first non-oriented polymer film, be incorporated into described first non-oriented based on the film of polyvinyl alcohol (PVA) the second non-oriented polymer film, be incorporated into described second non-oriented polymer film the second non-oriented based on polyvinyl alcohol (PVA) film and be incorporated into the three non-oriented polymer film of described second non-oriented based on the film of polyvinyl alcohol (PVA).
Described non-oriented polymer film as having 5 or more maximum orientation magnifications doubly temperature range is from 20 DEG C to 85 DEG C, can be specially and having the polymer film of scope from about 5 to 15 times maximum orientation magnifications.Such as, can provide density polyethylene film with high, polyamine ester film, polypropylene screen, polyolefin film, film, low density polyethylene films, high density polyethylene and Low Density Polyethylene co-extruded films based on ester, copolymer resins film containing ethylene vinyl acetate in high density polyethylene, acrylic film, polyethylene terephthalate film, based on the film of polyvinyl alcohol (PVA), based on cellulosic film etc., as the example of non-oriented polymer film.
The orientation of described film laminated body can be carried out by dry orientation or wet orientation, and when wet orientation, have boron concentration from 1 to 5wt% scope boron aqueous solution in carry out the orientation of described film laminated body.
The temperature of 20 DEG C to 85 DEG C, the orientation of described film laminated body can be carried out under the orientation magnification of 5 to 15 times.
The described method at least one that can further be included in the front iodine of orientation of described film laminated body and dichroic dye dyes the film of described non-oriented based on polyvinyl alcohol (PVA).
In the film laminated body of described orientation, the separation of described polymer film from the described film based on polyvinyl alcohol (PVA) can be carried out by the peel strength applying below 2N/2cm.
According to certain embodiments of the present invention, film polarizer can be manufactured by said method, and described film polarizer can have 10 μm or less thickness and have the group transmittance (group transmittance) of 40 to 45% and the degree of polarization of 99% or larger.
According to certain embodiments of the present invention, the polarization plates comprising above-mentioned film polarizer can be provided.
Beneficial effect
According to the embodiment of the present invention, in the manufacture method of described film polarizer, can be manufactured by the technique simplified and there is the film polarizer that 10 μm or less thickness have fabulous technology stability simultaneously.
In addition, according to an illustrative embodiment of the invention, when using the wherein PVA film film laminated body be arranged between two or more non-oriented polymer films to carry out orientation process, even if when carrying out high power orientation damaged incidence can be reduced significantly when increasing the degree of orientation of PVA polaroid.Therefore, the film polarizer with fabulous physioptial character can be manufactured.
Accompanying drawing explanation
Fig. 1 represents the schematic diagram using Texture instrument to measure the method for adhesion strength or peel strength;
Fig. 2 is the schematic diagram representing the damaged incidence comparing the film laminated body manufactured in embodiments of the present invention 1 and comparative example 1 and 2; And
Fig. 3 is the photo of the surface state representing the film polarizer manufactured in embodiments of the present invention 2.
Embodiment
As manufacturing the result that repeat study of film-type based on the polarizing coating of polyvinyl alcohol (PVA), the present inventor finds to be incorporated into the one or both sides of non-oriented polymer film and the accumulating film that formed by having the non-oriented that reduces thickness based on the film of polyvinyl alcohol (PVA) by using, can manufacture and there is the polaroid that excellent optical character (as high-polarization etc.) has the reduction thickness of 10 μm or less simultaneously, there is not breakage in a manufacturing process simultaneously, and have submitted Korean Patent (the invention exercise question: the manufacture method of film polarizer that application number is 10-2012-0130576, and use the film polarizer of the method and polarization plates) and application number be 10-2012-0130577 (invention exercise question: the manufacture method of film polarizer, and use the film polarizer of the method and polarization plates) application.
But, in the application that these are submitted to, according to the limitation that can reduce damaged incidence.Such as because polymer film and based on polyvinyl alcohol (PVA) film between clinging power relatively low, during technique, there is the problem that the described film based on polyvinyl alcohol (PVA) and described polymeric membrane are separated from each other etc., therefore bad stability in the process.Therefore, as the result repeating to study of the manufacture method in order to develop the film polarizer with relative LB incidence and fabulous technology stability of being undertaken by the present inventor, the present invention is provided to solve problem as above.
Below, embodiments of the present invention are described in detail with reference to accompanying schematic figure.But the present invention can illustrate in a number of different ways and should not be construed as limited to embodiment described herein.Certainly, provide these embodiments so that this invention will be complete and complete, and scope of the present invention will be passed on fully to those skilled in the art.
According to an illustrative embodiment of the invention, the manufacture method of film polarizer can comprise and uses attractive force or adhesive phase to form film laminated body by making non-oriented be incorporated into based on the film of polyvinyl alcohol (PVA) and sandwich between two or more non-oriented polymer films, film laminated body described in orientation so that the film based on polyvinyl alcohol (PVA) has 10 μm or less thickness, and makes polymer film described in the film laminated body of described orientation and the film based on polyvinyl alcohol (PVA) be separated from each other.
When using film laminated body, as mentioned above, non-oriented polymer film is arranged on the two sides of non-oriented based on the film of polyvinyl alcohol (PVA), because polymer film is positioned at the upper and lower portion of a slice based on poly film, thus sandwich wherein in a symmetrical, in technique subsequently, as described in the orientation process etc. of film laminated body, the possibility that the described film based on polyvinyl alcohol (PVA) may be out of shape reduces.Therefore, the stability in the manufacturing process of polaroid can be improved, and crimpiness when polarization plates manufactures is fabulous.
In addition, when using such film laminated body, because use two or more polymer films, when tension applicatcation is in described film laminated body, the elastic modulus of the film per unit area based on polyvinyl alcohol (PVA) may be reduced, compared with using the situation of a slice polymer film, damaged occurrence rate can be reduced.Therefore, carry out high power orientation Absorbable organic halogens.
Further, when having the film laminated body of structure described above, can effectively suppress, the peeling of peeling off based on the film of polyvinyl alcohol (PVA) occurred according to the degree of expansion of the described film based on polyvinyl alcohol (PVA) in the wet orientation process manufacturing described polaroid and/or described segregation phenomenon etc. of peeling off from polymeric substrate based on the film of polyvinyl alcohol (PVA).Thus, the instability of film laminated body can be reduced.
In addition, in the wet orientation process of boron using relative lower concentration, usually, can occur that the film based on polyvinyl alcohol (PVA) expanded is attached to and around the phenomenon on neighbouring volume, but according to an illustrative embodiment of the invention, because polymeric substrate is positioned on the described two sides based on the film of polyvinyl alcohol (PVA), such phenomenon can be prevented, and therefore, even if when using the boric acid aqueous solution of low concentration, described technique can be carried out when not damaging described duplexer.
On the other hand, when disclosed in the patented claim that applicant of the present invention has submitted to when manufacture method, because the film based on polyvinyl alcohol (PVA) is attached on the one or both sides of polymer film, due to variant based on the degree of expansion between the film of polyvinyl alcohol (PVA) and described polymer film described in wet orientation process, may there is the described phenomenon based on film distortion on a direction of polymer film of polyvinyl alcohol (PVA).But according to an illustrative embodiment of the invention, when described film laminated body, because the described film based on polyvinyl alcohol (PVA) is not exposed to outside, even if when carrying out wet orientation process, phenomenon as above can suppress on degree of functioning ground.
Further, when the described film based on polyvinyl alcohol (PVA) is exposed to outside, before introducing polaroid manufacturing process, described film laminated body is wound for the form of volume film, usually, film as polyvinyl alcohol (PVA) is damaged, may occur through moisture, the surface of the described film based on polyvinyl alcohol (PVA) of causing such as the gauffer phenomenon of mutually pasting, but according to an illustrative embodiment of the invention, problem as above can be prevented.
Below, according to an illustrative embodiment of the invention, the manufacture method of film polarizer will further be described in detail.
First, non-oriented is incorporated into based on the film of polyvinyl alcohol (PVA) by attractive force or adhesive phase and is sandwiched between two or more non-oriented polymer films and forms film laminated body with this.
According to an illustrative embodiment of the invention, described film laminated body can be used, as long as it has non-oriented be arranged in structure between two or more non-oriented polymer films based on the film of polyvinyl alcohol (PVA), and the quantity of described non-oriented polymer film or described non-oriented are not particularly limited based on the quantity of the film of polyvinyl alcohol (PVA).
Such as, described film laminated body can have the first non-oriented of comprising the first non-oriented polymer film, being incorporated into described first non-oriented polymer film based on the film of polyvinyl alcohol (PVA) be incorporated into the structure of described first non-oriented based on the second non-oriented polymer film of the film of polyvinyl alcohol (PVA), such as, orientated polymer film/non-oriented is based on the structure of the film/non-oriented polymer film of polyvinyl alcohol (PVA).
Selectively, described film laminated body also can have and comprises the first non-oriented polymer film, be incorporated into the film of the first non-oriented based on polyvinyl alcohol (PVA) of described first non-oriented polymer film, be incorporated into the second non-oriented polymer film of described first non-oriented based on the film of polyvinyl alcohol (PVA), be incorporated into the film of the second non-oriented based on polyvinyl alcohol (PVA) of described second non-oriented polymer film, with be incorporated into the structure of described second non-oriented based on the 3rd non-oriented polymer film of the film of polyvinyl alcohol (PVA), such as, non-oriented polymer film/non-oriented based on the film/non-oriented polymer film/non-oriented of polyvinyl alcohol (PVA) based on the structure of the film/non-oriented polymer film of polyvinyl alcohol (PVA).Except such structure, also can use the film laminated body with mutually stacking polymer film that quantity increases further or the structure based on the film of polyvinyl alcohol (PVA).Such amendment also will comprise within the scope of this invention.
In addition, comprise in two or more situations based on the film of polyvinyl alcohol (PVA) at described film laminated body of the present invention, each described two surfaces based on the film of polyvinyl alcohol (PVA) also should be provided with the polymer film be located thereon.Therefore, in the additional process relative to described film laminated body, the possibility that the described film based on polyvinyl alcohol (PVA) may be out of shape can reduce, and its principle is as implied above.
On the other hand, can be provided in described film laminated body of the present invention the described non-oriented polymer film used, thus prevent from described orientation process, destroy the described film based on polyvinyl alcohol (PVA), and described non-oriented polymer film can be the polymer film at the temperature of 20 DEG C to 85 DEG C with 5 or more maximum orientation magnifications doubly.In the case, described maximum orientation magnification refers to by the orientation magnification before breakage.On the other hand, above-mentioned orientation can refer to dry orientation process or wet orientation process.When described dry orientation process, the concentration of boron can refer to that the maximum orientation magnification in the situation of described orientation process is carried out in use 1.0 to the boric acid aqueous solution of the boron concentration of 5wt%.
As this polymer film, can use such as, density polyethylene film with high, polyamine ester film, polypropylene screen, polyolefin film, film, low density polyethylene films, high density polyethylene and Low Density Polyethylene co-extruded films based on ester, copolymer resins film containing ethylene vinyl acetate in high density polyethylene, acrylic film, polyethylene terephthalate film, based on the film of polyvinyl alcohol (PVA), based on cellulosic film etc., but the present invention is not limited to this.
On the other hand, the described non-oriented polymer film used in the present invention can have 20 μm to about 100 μm, is specially 30 μm to about 80 μm, is more specifically the thickness of 40 μm to about 60 μm.When the thickness of described non-oriented polymer film is less than 20 μm, because polymer film can not support the described film based on polyvinyl alcohol (PVA) fully described in the orientation process of described film laminated body, breakage etc. may be there is.When the thickness of described non-oriented polymer film is more than 100 μm, the orientation character possible deviation of described film laminated body, and natural shrinkage in width may be hindered when the film based on polyvinyl alcohol (PVA) described in drying, the physioptial character of the last polaroid obtained may be reduced like this.
In addition, the glass transition temperature of non-oriented polymer film can lower than the glass transition temperature of the described film based on polyvinyl alcohol (PVA), and such as, scope can, at 20 DEG C to about 60 DEG C, be more specifically, 30 DEG C to about 60 DEG C.Consider that the described glass transition temperature based on the film of polyvinyl alcohol (PVA) is usually the scope of 70 DEG C to about 80 DEG C, when the glass transition temperature of described polymer film meets such numerical range, under described orientation temperature condition, described polymer film can have the characteristic of flexible relative.Therefore, the described orientation characteristic based on the film of polyvinyl alcohol (PVA) can further be improved.But when described glass transition temperature is too low, because may there is breakage when high power orientation, the glass transition temperature of described polymer film can be 20 DEG C or higher.On the other hand, differential scanning calorimeter (DSC) can be used to measure described glass transition temperature.Such as, when only approximately the sample of 10mg be enclosed in DSC planchet (fan), and to heat under predetermined Elevated Temperature Conditions, its temperature can be measured measure the caloric receptivity and calorific value that generate when undergoing phase transition, thus determine its glass transition temperature.
In addition, when described non-oriented polymer film, its elastic modulus scope under room temperature (about 25 DEG C) can comprise about 200MPa to 1500MPa, is specially, about from 350MPa to 1300MPa.When the elastic modulus of described polymer film is more than 1500MPa, be difficult to realize high amplification degree orientation, and, when the elastic modulus of described polymer film is less than 200MPa, may breakage be there is during described orientation process.In the case, described elastic modulus refers to based on then applying power and the value that force value size that the tension force that provides measures per unit area obtains on the direction orthogonal relative to the thickness direction of film of the two ends by the fixing sample standby according to JIS-K6251-1 metric system.As measuring equipment, such as, universal testing machine (Zwick/Roell Z010UTM) etc. can use.
In addition, when described non-oriented polymer film, about under room temperature (25 DEG C), the scope of the power of its limit can comprise from 5N to 40N, be more specifically, about from 10N to 30N.In the case, the power of the described limit refers to when then the two ends by fixed sample apply tension force on the direction orthogonal relative to the thickness direction of film, the tension force obtained during film rupture, and, such as, the measurements such as universal testing machine (Zwick/Roell Z010UTM) can be used.When the power of the limit of described non-oriented polymer film exceedes such numerical range, be difficult to realize high power orientation or may breakage be occurred in the orientation process stage.
On the other hand, in the present case, two or more polymer film is used.At this, described polymer film, such as, described first non-oriented polymer film, described second non-oriented polymer film, described 3rd non-oriented polymer film etc., can be and the polymer film be no difference or polymer film different from each other.
Subsequently, insert the non-oriented between described non-oriented polymer film can have about 10 to 60 μm thickness based on the film of polyvinyl alcohol (PVA), be specially about 10 to 40 μm.When described non-oriented based on the thickness of the film of polyvinyl alcohol (PVA) more than 60 μm, even after described orientation process, be also not easy acquisition 10 μm or less thickness, and when its thickness is less than 10 μm, during described orientation process, easily there is breakage.
On the other hand, described non-oriented can have 1,000 to 10 based on the film of polyvinyl alcohol (PVA), and the degree of polarization of about 000, is specially 1,500 to 5, and about 000, but be not limited to this.When described degree of polarization meets such scope, molecular motion can be promoted, and molecule successfully can mix with iodine, dichroic dye etc.
Further, according to an illustrative embodiment of the invention, as the film of described non-oriented based on polyvinyl alcohol (PVA), the film based on polyvinyl alcohol (PVA) commercially sold can be used, and such as, PS30, PE30, PE60 that Kuraray sells, M2000, M3000, M6000 etc. that Nippon Gohsei sells.
On the other hand, described film laminated body of the present invention can use two or more based on the film of polyvinyl alcohol (PVA), and the described film based on polyvinyl alcohol (PVA) can be same to each other or different to each other according to its composition or degree of polarization etc.
On the other hand, described non-oriented can be the film under the state with iodine and/or dichroic dye dyeing based on the film of polyvinyl alcohol (PVA).More specifically, described non-oriented can for standing the film of expansion process and described dyeing based on the film of polyvinyl alcohol (PVA).
For this reason, before film laminated body described in orientation, can carry out further dyeing the technique of described non-oriented based on the film of polyvinyl alcohol (PVA) with iodine and/or dichroic dye, and, more specifically, described non-oriented of can carrying out further expanding is based on the film of polyvinyl alcohol (PVA) and dye the non-oriented of described expansion based on the technique of the film of polyvinyl alcohol (PVA) with iodine and/or dichroic dye.
In the case, the expansion process of described non-oriented based on the film of polyvinyl alcohol (PVA) can be carried out, to promote described iodine and/or dichroic dye described based on the absorption in the film of polyvinyl alcohol (PVA) and dispersion, and improve the described orientation character based on the film of polyvinyl alcohol (PVA).Such as, by immersing the film 5 to 30 second of described non-oriented based on polyvinyl alcohol (PVA) in the pure water of 25 DEG C to 30 DEG C, being specially 10 to 20 seconds, can described expansion process being carried out, but be not limited to this.In addition, described expansion process so that described non-oriented can be carried out about 36% to 44%, can be specially in the scope of about 38% to 42% based on the degree of expansion of the film of polyvinyl alcohol (PVA).When described non-oriented meets such numerical range based on the degree of expansion of the film of polyvinyl alcohol (PVA), the optical property of the final film polarizer obtained, as degree of polarization etc., can be relatively remarkable.On the other hand, can calculate by { (based on the weight based on the film of polyvinyl alcohol (PVA) before the weight-expansion of the film of polyvinyl alcohol (PVA) after expansion)/expand the front weight based on the film of polyvinyl alcohol (PVA) } × 100 and represent described degree of expansion.
Further, immerse described non-oriented and can carry out described dyeing by being equipped with in the dye vat containing the staining solution of iodine and/or dichroic dye based on the film of polyvinyl alcohol (PVA) or with the described film based on polyvinyl alcohol (PVA) of staining solution coating containing iodine and/or dichroic dye.In this case, although usually can water be used, as the solvent of described staining solution, there is the organic solvent of compatibility also can mix with water with glassware for drinking water.On the other hand, relative to the solvent of 100 weight portions, iodine and/or the dichroic dye content in staining solution is that 0.06 weight portion is to 0.25 weight portion.Further, described staining solution can further containing the auxiliary agent for improving staining efficiency except iodine and/or dichroic dye.As described auxiliary agent, iodide can be used, as potassium iodide, lithium iodide, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide and its potpourri.In the case, relative to the solvent of 100 weight portions, the content of described auxiliary agent is about 0.3 weight portion to 2.5 weight portions, and is specially, about the weight ratio of iodine and iodide can comprise from 1:5 to 1:10.On the other hand, can described dyeing be carried out under about 25 DEG C to the temperature of 40 DEG C, and in described dye vat the dip treating time can be about 30 to 120 seconds, but the present invention is not limited to this.
On the other hand, can by alternately be combined with each other by bonding agent described non-oriented polymer film and described non-oriented based on polyvinyl alcohol (PVA) film or when without when independently dielectric material by alternately stacking described non-oriented polymer film and the described non-oriented film manufacture described film laminated body according to an illustrative embodiment of the invention based on polyvinyl alcohol (PVA).
On the other hand, when utilize attractive force be combined with each other film based on polyvinyl alcohol (PVA) of described non-oriented polymer film and described non-oriented time, the one side or two sides of described polymer film or the described film based on polyvinyl alcohol (PVA) can carry out surface treatment to have suitable clinging power.In the case, described surface treatment can be undertaken by well-known various method, such as, and the surface modification treatment of corona treatment, the process of electricity slurry, use strong alkali aqueous solution (as NaOH or KOH etc.).
When described non-oriented polymer film and described non-oriented be combined with each other based on the film of polyvinyl alcohol (PVA), before orientation process, the thickness of adhesive phase can in the scope about 20nm to 4000nm, being specially about 20nm to 1000nm, is more specifically about 20nm to 500nm.After the orientation process of described film laminated body, the thickness of described adhesive phase in the scope of about 10nm to 1000nm, can be specially about 10nm to 500nm, is more specifically about 10nm to 200nm.When the thickness of adhesive phase meets above-mentioned scope described in the orientation process front and rear of described film laminated body, the described layering based on the film of polyvinyl alcohol (PVA) can be promoted after described orientation process and drying process, and damage can not be caused to it.
The material of described bonding agent is not particularly limited, and unrestrictedly can use various well-known bonding agent.Such as, water-based adhesive or ultraviolet light curing adhesive is used can to form described adhesive phase.
More specifically, use and can form described adhesive phase containing being selected from based on the resin of polyvinyl alcohol (PVA), acryl resin and the water-based adhesive based on one or more in the resin of vinyl acetate.
Alternately, the water-based adhesive containing the resin based on polyvinyl alcohol (PVA) comprising acrylic acid groups and oh group is used can to form described adhesive phase.Here, the resin based on polyvinyl alcohol (PVA) comprising acrylic acid groups and oh group described in can have the degree of polarization of about 500 to 1800.
Alternately, the water-based adhesive comprising the metallic compound crosslinking chemical based on amine and the resin based on polyvinyl alcohol (PVA) containing acetoacetyl group is used can to form described adhesive phase.More specifically, described bonding agent can for comprise described in 100 weight portions containing acetoacetyl group the resin based on polyvinyl alcohol (PVA) and with described in 1 to 50 weight portion based on the aqueous solution of the metallic compound crosslinking chemical of amine.
Here; although degree of polarization and the saponification degree of the described resin based on polyvinyl alcohol (PVA) are not particularly limited, as long as the described resin based on polyvinyl alcohol (PVA) only comprises acetoacetyl group, its degree of polarization described can be 200 to 4; 000, and its saponification degree described can be 70mol% to 99.9mol%.In the case, the described resin based on polyvinyl alcohol (PVA) can comprise the acetoacetyl group of 0.1 to 30mol%.Time in above-mentioned scope, it is smooth with the reaction based on the metallic compound crosslinking chemical of amine, and the water tolerance of subject adhesives is enough remarkable.
The described metallic compound crosslinking chemical based on amine has the water-soluble cross-linker with the functional group of the described resin reaction based on polyvinyl alcohol (PVA), and can have the metal mixture form of the part comprised based on amine.Transition metal can be used as wherein operable metal, as zirconium (Zr), titanium (Ti), hafnium (Hf), tungsten (W), iron (Fe), cobalt (Co), nickel (Ni), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), palladium (Pd), platinum (Pt) etc.Any part can be used as the part with central metal chemical combination, as long as it material comprising one or more formation amido is as primary amine, secondary amine (diamino), tertiary amine, ammonium hydroxide etc.
In addition, when such bonding agent, described in comprise the resin based on polyvinyl alcohol (PVA) of acetoacetyl group solid content can about 1 to 10wt% scope in.When the solid content of the described resin based on polyvinyl alcohol (PVA) is less than 1wt%, because its water tolerance can not fully ensure, in described orientation process, reduce the effect that breakage occurs may be relatively low.When the solid content of the described resin based on polyvinyl alcohol (PVA) is more than 10wt%, the operating voltage of user weakens, and when carrying out separating technology, may damage the described surface based on the film of polyvinyl alcohol (PVA).
The pH of described bonding agent can in the scope of about 4.5 to 9.When the PH of described bonding agent meets above-mentioned numerical range, the storage properties in high humidity atmosphere and permanance can be improved further.
On the other hand, the pH of described bonding agent can be adjusted by the method comprising acid in aqueous, and in the case, as the acid of its pH of Use Adjustment, strong acid and weak acid can use.Such as, nitric acid, hydrochloric acid, sulfuric acid, acetic acid etc.
On the other hand, before described orientation process, the thickness of the described adhesive phase that the described bonding agent of use described above is formed can in the scope about 80nm to 200nm, be specially about 80nm to 150nm, and, after the orientation process of described film laminated body, in the scope about 10nm to 100nm, about 10nm to 80nm can be specially.When the thickness of described adhesive phase meets above-mentioned scope, cohesive between basement membrane and the described film based on polyvinyl alcohol (PVA) can remain on suitable level, thus the damaged incidence in orientation process can reduce, further, the damage on polaroid surface significantly can be reduced when there is layering.
When above-mentioned bonding agent, cross-linking reaction can occur between the described metallic compound based on amine and the acetoacetyl group of the described resin based on polyvinyl alcohol (PVA), therefore the water tolerance of adhesive phase can be relatively high after the curing process.Therefore, when using the stacking described polymer film of bonding agent and described film based on polyvinyl alcohol (PVA), the phenomenon that described bonding agent dissolves in water can significantly reduce more effectively to use in described wet orientation process.
On the other hand, also ultraviolet light curing adhesive can be used to form described adhesive phase, described ultraviolet light curing adhesive comprises, such as, the glass transition temperature of homopolymer is the first ring oxygen compound of 120 DEG C or higher, the glass transition temperature of homopolymer is second epoxy compound of 60 DEG C or lower, and cationic photopolymerization initiating agent.Concrete, the glass transition temperature that described ultraviolet light curing adhesive can comprise the homopolymer of 100 weight portions is the first ring oxygen compound of 120 DEG C or higher, the glass transition temperature of the homopolymer of 30 to 100 weight portions is second epoxy compounds of 60 DEG C or lower, and the cationic photopolymerization initiating agent of 0.5 to 20 weight portions.
In the present invention, described epoxy compound can refer to the compound comprising one or more epoxide group in the molecule, concrete, comprise the compound of two or more epoxide groups in the molecule, and can refer to comprise monomer, polymkeric substance, or the concept of all compounds of resin form.More specifically, according to an illustrative embodiment of the invention, described epoxy compound can have the form of resin.
On the other hand, as described first ring oxygen compound, any epoxy compound can be used, as long as the glass transition temperature of homopolymer is 120 DEG C or higher epoxy compound, and be not particularly limited.Such as, the glass transition temperature of homopolymer can be used to be 120 DEG C or higher aromatic epoxies and/or alicyclic epoxide compound as described first ring oxygen compound of the present invention.The glass transition temperature that can be provided as homopolymer is the concrete example of the described epoxy compound of 120 DEG C or higher, 3,4-epoxycyclohexyl-methyl-3,4'-epoxycyclohexane carboxylate, titanium dioxide vinylcyclohexene titanium dioxide bicyclopentadiene, bis-epoxy cyclopentyl ether, the epoxy compound based on bisphenol-A, the epoxy compound etc. based on Bisphenol F.In more detail, as described first ring oxygen compound, the epoxy compound of the glass transition temperature of homopolymer in the scope of 120 DEG C to about 200 DEG C can be used.
As described second epoxy compound, any epoxy compound can be used, as long as the glass transition temperature of homopolymer is 60 DEG C or lower epoxy compound, and be not particularly limited.Such as, as described second epoxy compound, alicyclic epoxide compound can be used, aliphatic epoxy compound etc.
In the case, as alicyclic epoxide compound, 2-functional epoxide compound, such as, can use the compound with two epoxide groups.More specifically, two epoxide groups can be used to be all the compound of cycloaliphatic epoxy groups, but to be not limited to this.
As aliphatic epoxy compound, as an example, the epoxy compound with the aliphatic epoxide groups being different from cycloaliphatic epoxy groups can be used.Such as, the polyglycidyl ether of aliphatic polyol can be used, the polyglycidyl ether of the alkylene oxide adduct of aliphatic polyol, the polyglycidyl ether of the polyester polyol of aliphatic polyol and aliphatic polycarboxylic acid, the polyglycidyl ether of aliphatic polycarboxylic acid, the polyglycidyl ether of the polyester polycarboxylic acid of aliphatic polyol and aliphatic polycarboxylic acid, the dipolymer obtained by the vinyl polymerization of glycidyl acrylate or glycidyl methacrylate, oligomer, or polymkeric substance, by be different from glycidyl acrylate or glycidyl methacrylate the monomer based on ethene vinyl polymerization obtain oligomer or polymkeric substance.Concrete, polyglycidyl ether or its alkylene oxide adduct of aliphatic polyol can be used, but the present invention is not limited to this.
In the case, such as, as described aliphatic polyol, as example, the aliphatic polyol of the carbon number with 2 to 20,2 to 16,2 to 12,2 to 8 or 2 to 4 scopes can be provided.Such as, aliphatic diol can be used, as ethylene glycol, 1,2-propylene glycol, 1,3-PD, 2-methyl isophthalic acid, ammediol, 2-butyl-2-ethyl-1, ammediol, 1,4-butylene glycol, neopentyl glycol, 3-methyl-2,4-pentanediol, 2,4-pentanediols, 1,5-pentanediol, 3-methyl isophthalic acid, 5-pentanediol, 2-methyl-2,4-pentanediol, 2,4-diethyl-1,5-pentanediol, 1,6-hexanediol, 1,7-heptandiol, 3,5-heptandiols, 1,8-ethohexadiol, 2-methyl isophthalic acid, 8-ethohexadiol, 1,9-nonanediol and 1,10-decanediol; Alicyclic diol, as cyclohexanedimethanol, cyclohexanediol, hydrogenated bisphenol A and A Hydrogenated Bisphenol A F; Trimethylolethane, trimethylolpropane, hexitol, pentitol, glycerine, polyglycereol, pentaerythrite, dipentaerythritol, tetra methylol propane etc.
In addition, as alkylene oxide, as an example, the alkylene oxide of the carbon number with 1 to 20,1 to 16,1 to 12,1 to 8 or 1 to 4 scopes can be provided.Such as, oxirene, propylene oxide, butadiene monoxide etc. can be used.
In addition, as the example of described aliphatic polycarboxylic acid, ethane diacid can be provided, malonic acid, succinic acid, glutaric acid, hexane diacid, heptandioic acid, suberic acid, azelaic acid, decanedioic acid, dodecylic acid, 2-dimethyl succinic acid, 2-methyl hexane diacid, 3-methyl hexane diacid, 3 methylvaleric acid, 2-methyloctanoic acid, 3, 8-dimethyl capric acid, 3, 7-dimethyl capric acid, 1, 20-bis-decamethylene dicarboxylic acid, 1, 2-cyclopentane dicarboxylic acid, 1, 3-cyclopentane dicarboxylic acid, 1, 2-cyclohexane dicarboxylic acid, 1, 3-cyclohexane dicarboxylic acid, 1, 4-cyclohexane dicarboxylic acid, 1, 4-dicarboxyl methylenecyclohexane, 1, 2, 3-propyl tricarboxylic acids, 1, 2, 3, 4-BTCA, 1, 2, 3, 4-cyclo-butane tetrabasic carboxylic acid etc.But the present invention is not limited to this.
Concrete, described second epoxy compound of the present invention can contain one or more glycidyl ether group.Such as, as described second epoxy compound according to an illustrative embodiment of the invention, can use and be selected from 1,4-cyclohexanedimethanodiglycidyl diglycidyl ether, 1, one or more in 4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, neopentyl diglycidyl ether, resorcinolformaldehyde resin, diethylene glycol glycidol ether, diglycidyl ether of ethylene glycol, trihydroxymethylpropanyltri diglycidyl ether, n-butyl glycidyl ether, 2-hexyl glycidyl ether, phenyl glycidyl ether, o-tolyl glycidol ether.
The glass transition temperature range of homopolymer can be used from second epoxy compound of 0 DEG C to about 60 DEG C.
Meanwhile, more specifically, according to an illustrative embodiment of the invention, as described epoxy compound, can use the potpourri of the first ring oxygen compound comprising one or more epoxidised aliphatics cyclic group and the second epoxy compound comprising one or more glycidyl ether group, but the present invention is not limited to this.
As mentioned above, after forming described film laminated body, described film laminated body can through orientation process., can described orientation process be carried out so that the described film based on polyvinyl alcohol (PVA) can have 10 μm or less thickness here, concrete, 1 μm to about 10 μm can be had, 3 μm to about 10 μm, or the thickness of 1 μm to about 5 μm.
On the other hand, according to an illustrative embodiment of the invention, although alignment conditions is not particularly limited, such as, at the temperature of 20 DEG C to 85 DEG C and under the orientation magnification of 5 to 15 times, more specifically, at the temperature of 40 DEG C to 80 DEG C and under the orientation magnification of 5 to 12 times, described orientation process can be carried out.
In the case, described orientation process can be undertaken by wet orientation and dry orientation.But, because when described wet orientation process, thermoplastic polyurethane film and may increasing in described dry orientation process relative to it based on the surface adhesion force of the film of polyvinyl alcohol (PVA), can stablize when not having independent adhesive unit and carry out described wet orientation process.Described wet orientation process can be carried out in boron aqueous solution.Here, the boron concentration range in described boron aqueous solution can 1.0 to about 5.0wt%.
When carrying out described wet orientation process as mentioned above in described boron aqueous solution, because boron is cross-linked the damaged incidence that can reduce PVA film, stability in the process can be increased like this, and the fold in the described PVA film occurred during described wet orientation process can be suppressed.In addition, relative to it when dry orientation process, also described orientation process can be carried out at relatively low temperature.
On the other hand, the manufacturing process of polarization components can comprise washing process, expansion process, dyeing, cleaning procedure, orientation process, compensate for process usually, drying process etc., but in the present case, use boric acid aqueous solution can carry out described clean and orientation process.Concrete, when described cleaning procedure, the concentration of described boron can 0.1 to about 0.25wt%, or more specifically in 0.5 scope to about 2.0wt%, and when described orientation process, the concentration of described boron can 1.0 to about 5.0wt%, or more specifically in 1.5 scopes to about 4.5wt%.
On the other hand, after the orientation process of described film laminated body, clinging power between the film based on polyvinyl alcohol (PVA) and the polymer film of described orientation of described orientation can be 2N/2cm or less, is specially 0.1 to about 2N/2cm, be more specifically 0.1 to about 1N/2cm scope in.When the clinging power between the film based on polyvinyl alcohol (PVA) and the polymer film of described orientation of described orientation meets above-mentioned scope, the breakage on surface significantly can be reduced in separating technology, when forming adhesive phase between the described film based on polyvinyl alcohol (PVA) and described polymer film, because described adhesive phase and the described film based on polyvinyl alcohol (PVA) orientation in described orientation process, therefore relative to the situation before described orientation process, the thickness of described adhesive phase can be reduced to the level of 10 to 50%.Therefore, the clinging power between the described film based on polyvinyl alcohol (PVA) and described polymer film can be reduced to 2N/2cm or less, can promote described separating technology like this.In the case, when having adhered to the sample of the film as having 2cm length, can bounding force have been measured, and show detailed measuring method in FIG.In the present invention, as shown in fig. 1, described bounding force between described film shows, after use specimen holder H fixes the described polyvinyl alcohol film A of described film laminated body, by the surface direction relative to described film laminated body orthogonal on direction force be separated polyvinyl alcohol film A from polymer film B time the size of peel strength measured.In the case, as described measurement mechanism, the Texture instrument (TA-XT Plus) of Stable Micro Systems can be used.
As mentioned above after film laminated body described in orientation, as needs, the film laminated body of described orientation can further across drying process.In the case, described drying process can the temperature of 20 DEG C to about 100 DEG C, or carries out 1 to 10 minutes under 40 DEG C to about 90 DEG C more specifically.During polarization plates manufacturing process, described drying process is bad by the change of the physical property that removing PVA surface and inner moisture can prevent polaroid from causing due to moisture, and the contraction on the Width of the polyvinyl alcohol film carrying out described orientation during drying process smoothly can be caused, to increase the chromosomal directive property comprising polyvinyl alcohol film and iodine, and therefore to improve the degree of polarization of described polaroid.
Subsequently, the described polymer film of the film laminated body of described orientation and the described film based on polyvinyl alcohol (PVA) can be separated from each other.In the present invention, described separating technology can be completed by the method for the peel strength to the described film application low relative levels based on polyvinyl alcohol (PVA), and such two kinds of films are separated from each other.In the case, described peel strength can be 2N/2cm or less, and, such as, can 0.1 to about 2N/2cm, or be more specifically 0.1 to about 1N/2cm scope in.
In the present invention as above, because the peel strength needed when being separated the described film based on polyvinyl alcohol (PVA) from described polymer film is relatively more weak than being carried out stacking situation by rubbing method or coetrusion, when without separating technology with when not using tripping device, two kinds of films can easily be separated from each other, and the breakage based on the film of polyvinyl alcohol (PVA) described in described separating technology can significantly reduce, significantly remarkable optical property can be shown like this.
On the other hand, according to an illustrative embodiment of the invention, the manufacture method of described film polarizer can be carried out to blade technolgy, sheet to volume technique, reel-to-reel technique etc. by well-known.Here, the described method that can cut individual type film with pre-sizing by use from raw material film (such as the described film based on polyvinyl alcohol (PVA) or described polymer film) to blade technolgy is carried out; Further, described can be used as wherein being wound with of a part for raw material film to stretch the roll film of film to volume technique, and carries out as the method that the cutting that surplus stock film uses has individual type film of predetermined size.Consider continuity and the throughput rate of described technique, institute's reel-to-reel technique can be used in above-mentioned technique.
Such as, according to an illustrative embodiment of the invention, the manufacture method of described film polarizer can comprise: by arrange between non-oriented polymer film volume non-oriented based on the film volume of polyvinyl alcohol (PVA) and the adhesive phase of bounding force utilizing attractive force when unclamping the described film based on polyvinyl alcohol (PVA) and described polymer film from described film volume or there is 2N/2cm or less be combined with each other based on the film of polyvinyl alcohol (PVA) and polymer film, thus formed and comprise two or more non-oriented polymer films and the non-oriented film laminated body based on the film of polyvinyl alcohol (PVA); Film laminated body described in orientation is to have 10 μm or less thickness based on the film of polyvinyl alcohol (PVA) described in providing after described orientation process; And be separated from each other the described polymer film of film laminated body of described orientation and the described film based on polyvinyl alcohol (PVA).
After the polymer film of two or more non-oriented described and the film based on polyvinyl alcohol (PVA) of described non-oriented be combined with each other, rewinding process can be carried out, the film of described like this combination can recoil the form into volume, and described film laminated body can be opened to be introduced into orientation process from the film laminated body unwinding of described recoil, or its orientation process can be carried out immediately when not having rewinding process.
In addition, described separating technology can by inserting delamination unit (such as between described polymer film and the described film based on polyvinyl alcohol (PVA), layering is rolled up) method carry out, interface to be in-between wound around the polymer film of described separation respectively and to roll up in difference based on the film of polyvinyl alcohol (PVA) from polymer film described in the described UF membrane based on polyvinyl alcohol (PVA).
The described polaroid of the present invention manufactured by said method can have 10 μm or less, is specially 1 μm to about 10 μm, is more specifically the very thin thickness of 3 μm to about 10 μm.In addition, even if when thickness thin like this, polarizer group transmitance can in the scope of about 40 to 45%, and degree of polarization can be 99% or higher, can show significantly remarkable physical optical properties whereby.
In addition, according to an illustrative embodiment of the invention, the degree of polarization of described polaroid on the Width of described polaroid can have very excellent consistance.Particularly, according to an illustrative embodiment of the invention, when polaroid, the standard deviation of the degree of polarization that 10 some positions that described polariscopic Width equidistantly separates each other are measured can be 0.002% or less.
On the other hand, polarization plates can be formed by stacking hyaline membrane on the one or both sides of polaroid as above according to an illustrative embodiment of the invention.In the case, as described hyaline membrane, normally used various film can use as polaroid protective film or phase shift films, and is not particularly limited.Such as, described hyaline membrane can be used, as acrylic film, polyethylene terephthalate (PET) film, by the PET film of acrylic primer process, based on cellulosic film, the film based on cycloolefin, the film based on polycarbonate, film etc. based on polynorbornene.
The mutually stacking method of polaroid and hyaline membrane is not particularly limited, and can use well-known membrane laminating process.Such as, can make with the following method: application bonding agent or contact adhesive (cohesiveagent) are at least one side of described polaroid and/or hyaline membrane and polaroid and described hyaline membrane etc. described in lamination.Here, suitably described contact adhesive or described bonding agent can be selected according to the material of described hyaline membrane etc.Such as, when using tri acetyl cellulose membrane (TAC) as hyaline membrane, water-based adhesive can be used, as the bonding agent based on polyvinyl alcohol (PVA), and, when using acrylic film, cyclic olefin polymer (COP) film etc. as described hyaline membrane, Photocurable adhesive or hot setting adhesive can be used, as acryloid cement or the bonding agent based on epoxy.
Although the mutually stacking method of polaroid and hyaline membrane is not particularly limited, according to throughput rate, the scheme of the reel-to-reel that polarizer membrane is rolled up and hyaline membrane is rolled up can be used.Be normally used method because described by the manufacture method through the mutual stacking polaroid of scheme of described reel-to-reel and the polarization plates of hyaline membrane, will its detailed description be omitted.When the scheme by described reel-to-reel manufactures polarization plates, the roll polarization plates of extension can be obtained.
Except described hyaline membrane, according to an illustrative embodiment of the invention,, described polarization plates can comprise the optical layers for adhering to the difference in functionality on liquid crystal panel further, as brightness improving film, prime coat, hard coat, antiglare layer, anti-reflecting layer or tack coat etc.The formation method of described optical layers is not particularly limited, and can use well-known method.
Described polarization plates according to an illustrative embodiment of the invention can have fabulous optical property, there is the thickness significantly reduced simultaneously for the thickness of the polarization plates according to correlation technique, to be used effectively in display device, as display panels, Organnic electroluminescent device etc.
Below, based on following embodiment, in more detail the present invention will be described.
Embodiment 1
When not using dielectric material three non-oriented polyurethane films and two panels non-oriented based on polyvinyl alcohol (PVA) film alternately mutually stacking to be formed with this there is the film/non-oriented polyurethane film/non-oriented of non-oriented polyurethane film/non-oriented based on polyvinyl alcohol (PVA) based on the film laminated body of the film/non-oriented polyurethane film structure of polyvinyl alcohol (PVA).
In the case, as the film of non-oriented based on polyvinyl alcohol (PVA), the PE30 level of Kuraray can be used based on the film (thickness: 30 μm) of polyvinyl alcohol (PVA), and expand 15 seconds at 25 DEG C in pure solution, the dyeing then through using the iodine solution with the concentration of 0.3wt% to carry out at the temperature of 25 DEG C 60 seconds.
The film using the thermoplastic polyurethane resin reacting to each other acquisition by methylenediphenyl diisocyanates, BDO and hexane diacid to make can be used as non-oriented polyurethane film.
Comparative example 1
When not using dielectric material three non-oriented based on the film of polyvinyl alcohol (PVA) and two panels non-oriented polyurethane film alternately mutually stacking to be formed with this there is the film/non-oriented polyurethane film/non-oriented of non-oriented based on polyvinyl alcohol (PVA) based on the film/non-oriented polyurethane film/non-oriented of polyvinyl alcohol (PVA) based on the film laminated body of the membrane structure of polyvinyl alcohol (PVA).As described non-oriented based on the film of polyvinyl alcohol (PVA) and described non-oriented polyurethane film, can use as these the identical films in embodiment 1.
Comparative example 2
Have non-oriented based on polyvinyl alcohol (PVA) film/non-oriented polyurethane film/non-oriented based on the membrane structure of polyvinyl alcohol (PVA) film laminated body by alternately on the two sides of non-oriented polyurethane film stacking non-oriented formed based on the film of polyvinyl alcohol (PVA).As described non-oriented based on the film of polyvinyl alcohol (PVA) and described non-oriented polyurethane film, can use as these the identical films in embodiment 1.
Comparative example 3
The PE30 level of Kuraray expands 15 seconds in pure solution based on the film (thickness: 30 μm) of polyvinyl alcohol (PVA) at 25 DEG C, the dyeing then through using the iodine solution with the concentration of 0.3wt% to carry out at the temperature of 25 DEG C 60 seconds.
The measurement of EXPERIMENTAL EXAMPLE 1-damaged incidence
The film laminated body of described embodiment 1 and comparative example 1 and 2, with the film based on polyvinyl alcohol (PVA) of described comparative example 3 in the solution of boron with 1wt% through cleaning 15 seconds, then before being about to occur breakage at least one film based on polyvinyl alcohol (PVA), film laminated body described in orientation under the orientation magnification of 6 to 8 times.
After orientation process, the described thickness based on the film of polyvinyl alcohol (PVA) is calculated by following numerical expression with the ratio based on the thickness of the film of polyvinyl alcohol (PVA) described before described orientation process.Its result of calculation represents in fig. 2.
Thickness proportion (dr) (%)={ based on the thickness (do) based on the film of polyvinyl alcohol (PVA) before the thickness (d) of the film of polyvinyl alcohol (PVA)/orientation after orientation } × 100
The value of described thickness proportion (dr) is lower, can carry out orientation when not having damaged, and the thickness of its described film based on polyvinyl alcohol (PVA) provided after representing orientation reduces relatively.
As shown in Figure 2, when comparative example 3 of the described film autoorientation based on polyvinyl alcohol (PVA), described thickness proportion (dr) is about 27%.Further, described in comparative example 1 and comparative example 2 thickness proportion (dr) in the scope of about 21% to 22%.Meanwhile, when embodiments of the present invention 1, described thickness proportion (dr) is 19%, therefrom can understand relative to the situation comparative example 1 and 2, described in be oriented in when not having damaged and suitably carry out.
Embodiment 2
The non-oriented film duplexer of described embodiment 1 through cleaning 15 seconds, then under 7 times of orientation magnifications, comprises orientation in the solution of the boron of 2.5wt% in the B solution with 1wt% at 52 DEG C.After completing described orientation process, potassium iodide (KI) solution of 5wt% is used to carry out its compensate for process, then described film laminated body in 80 DEG C of baking ovens dry 5 minutes.Then, be separated the described film based on polyvinyl alcohol (PVA) by the Polyurethane substrate of the film laminated body from described orientation and obtain film polarizer.
On the other hand, Fig. 3 is for having represented the image of the surface state of the described film laminated body of drying process described in embodiment 2.As shown in Figure 3, can understand when using the film laminated body of described embodiment 2, stable orientation process can be carried out when not having damaged generation, and the surface state of the described film based on polyvinyl alcohol (PVA) is even and good.
Embodiment 3
The aqueous solution of 4wt% is produced by the polyvinyl alcohol (PVA) (average polarization degree of 2000, the saponification degree of 94%, Nippon Gohsei) dissolved containing acetoacetyl group (5wt%) in pure water.Here, relative to the polyvinyl alcohol (PVA) of 100 weight portions, add the titanium amine compound crosslinking chemical (the TYZOR TE of Dupont) of 6.7 weight portions and be uniformly mixed to manufacture adhesive A.
The two sides of a slice non-oriented polyamine ester film is coated with described adhesive A to 100nm thickness, then there is non-oriented film/non-oriented polyamine ester film/non-oriented based on polyvinyl alcohol (PVA) based on the film laminated body 1 of the structure of the film of polyvinyl alcohol (PVA) based on the film of polyvinyl alcohol (PVA) to manufacture in conjunction with two panels non-oriented to it.Then, described film laminated body 1 expands 15 seconds at 25 DEG C in pure water solution, is then through dyeing 60 seconds in the iodine solution of 0.3wt% having concentration at the temperature of 25 DEG C.
Then, by by attractive force on the two sides of described film laminated body 1 in conjunction with two panels non-oriented polyamine ester film, obtain having the film/non-oriented polyamine ester film/non-oriented of non-oriented Polyurethane/non-oriented based on polyvinyl alcohol (PVA) based on the non-oriented film duplexer of the structure of the film/non-oriented Polyurethane of polyvinyl alcohol (PVA).
In the case, as the film of described non-oriented based on polyvinyl alcohol (PVA), use the film (thickness: 20 μm) of M2000 level based on polyvinyl alcohol (PVA) of Nippon Gohsei, and as described non-oriented polyamine ester film, can use and be reacted to each other the film of heat plasticity polyurethane resin manufacture obtained by methylenediphenyl diisocyanates and hexane diacid.
Described non-oriented film duplexer in the B solution with 1wt% through cleaning procedure 15 seconds, with the orientation magnification orientation of 7 times in the solution of the then boron of described film laminated body containing 2.5wt% at 52 DEG C.After completing described orientation process, in potassium iodide (KI) solution of 5wt%, compensate process, then described film laminated body in the baking oven of 80 DEG C dry 5 minutes.Then, by being separated described polyamine ester film with the peel strength of 0.7N/2cm from the described film based on polyvinyl alcohol (PVA), thus obtain the film polarizer that two panels has 5 to 8 μm of thickness.
The measurement of EXPERIMENTAL EXAMPLE 2-physical optical properties
When the described film polarizer according to embodiment 2 and 3 manufacture, use JASCOV-7100 spectrophotometer measurement as the physical optical properties of polarizer group transmittance, degree of polarization, polarizer group color, orthogonal color etc.Its measurement result under provide in [table 1].
[table 1]
In reference when [table 1] described film polarizer made according to the method for the present invention, the physical optical properties can understood as polaroid list transmittance, degree of polarization, colour vision etc. is fabulous.
[description of Reference numeral]
H: frame
A: based on the film of polyvinyl alcohol (PVA)
B: polymer film
MD: longitude direction of orientation

Claims (15)

1. a manufacture method for film polarizer, comprises:
Attractive force or adhesive phase is used to form film laminated body by making non-oriented be incorporated into based on the film of polyvinyl alcohol (PVA) and sandwich between two or more non-oriented polymer films;
Film laminated body described in orientation is so that the described film based on polyvinyl alcohol (PVA) has 10 μm or less thickness; And
The described polymer film of the film laminated body of described orientation and the film based on polyvinyl alcohol (PVA) of described orientation are separated from each other.
2. the method for claim 1, wherein, described film laminated body comprises the first non-oriented polymer film, is incorporated into the film of the first non-oriented based on polyvinyl alcohol (PVA) of described first non-oriented polymer film, and is incorporated into the second non-oriented polymer film of the first non-oriented based on the film of polyvinyl alcohol (PVA).
3. the method for claim 1, wherein, described film laminated body comprises the first non-oriented polymer film, be incorporated into the film of the first non-oriented based on polyvinyl alcohol (PVA) of described first non-oriented polymer film, be incorporated into the second non-oriented polymer film of the first non-oriented based on the film of polyvinyl alcohol (PVA), be incorporated into the film of the second non-oriented based on polyvinyl alcohol (PVA) of the second non-oriented polymer film, and be incorporated into the three non-oriented polymer film of the second non-oriented based on the film of polyvinyl alcohol (PVA).
4. the method for claim 1, wherein described non-oriented polymer film is set to have the polymer film of 5 or more maximum orientation magnifications doubly at the temperature of 20 DEG C to 85 DEG C.
5. the method for claim 1, wherein, described non-oriented polymkeric substance comprise be selected from density polyethylene film with high, polyamine ester film, polypropylene screen, polyolefin film, film, low density polyethylene films, high density polyethylene and Low Density Polyethylene co-extruded films based on ester, copolymer resins film containing ethylene vinyl acetate in high density polyethylene, acrylic film, polyester terephthalate ethylene Glycol Films, based on the film of polyvinyl alcohol (PVA), based on one or more in cellulosic film etc.
6. the method for claim 1, wherein the orientation of described film laminated body is undertaken by dry orientation or wet orientation.
7. the method for claim 1, wherein described film laminated body be oriented in the temperature of 20 DEG C to 85 DEG C under carry out with the orientation magnification of 5 to 15 times.
8. being the method for claim 1, wherein oriented in the boron aqueous solution of the boron concentration range with 1 to 5wt% of described film laminated body is carried out.
9. the method for claim 1, at least one be further included in the front iodine of orientation of described film laminated body or dichroic dye dyes the film of described non-oriented based on polyvinyl alcohol (PVA).
10., the method for claim 1, wherein after the orientation of described film laminated body, the clinging power between the film based on polyvinyl alcohol (PVA) of described orientation and the polymer film of described orientation is 2N/2cm or less.
11., the method for claim 1, wherein by applying the peel strength of 2N/2cm or less, carry out being separated the described polymer film in the film laminated body of described orientation and the described film based on polyvinyl alcohol (PVA).
12. 1 kinds of film polarizer, it is by the method manufacture in claim 1 to 11 described in any one, and described film polarizer has 10 μm or less thickness, and has the group transmittance of 40 to 45% and the degree of polarization of 99% or larger.
13. film polarizer as claimed in claim 12, wherein, in described film polarizer, the standard deviation that the Width of described film polarizer has between some the degree of polarization that equally spaced 10 points are measured is 0.002% or less.
14. 1 kinds of polarization plates, it comprises film polarizer as claimed in claim 12.
15. 1 kinds of display device, it comprises polarization plates as claimed in claim 14.
CN201480000906.1A 2013-06-18 2014-06-13 The manufacture method of film polarizer, and use the film polarizer and polarization plates of the method manufacture Active CN104395789B (en)

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KR1020140067603A KR101584441B1 (en) 2013-06-18 2014-06-03 Preparing method for thin polarizer, thin polarizer and polarizing plate manufactured by using the same
PCT/KR2014/005231 WO2014204143A1 (en) 2013-06-18 2014-06-13 Method for manufacturing thin polarizer, and thin polarizer and polarizing plate manufactured using same

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