WO2015046858A1 - 박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 - Google Patents
박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 Download PDFInfo
- Publication number
- WO2015046858A1 WO2015046858A1 PCT/KR2014/008836 KR2014008836W WO2015046858A1 WO 2015046858 A1 WO2015046858 A1 WO 2015046858A1 KR 2014008836 W KR2014008836 W KR 2014008836W WO 2015046858 A1 WO2015046858 A1 WO 2015046858A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polyvinyl alcohol
- film
- based film
- auxiliary support
- thin polarizer
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
Definitions
- the present invention relates to a method of manufacturing a thin polarizer, a thin polarizer and a polarizing plate manufactured using the same, and more particularly, a method of manufacturing a thin polarizer having a thin thickness of 10 ⁇ m or less, a thin polarizer and a polarizing plate manufactured using the same. It is about.
- the polarizer used in the polarizing plate is an optical element for making natural light or arbitrary polarization into a polarized light in a specific direction, and is widely used in a display device such as a liquid crystal display device and an organic light emitting device (OLED).
- a polarizer used in the display device a polyvinyl alcohol polarizing film in which molecular chains containing iodine or dichroic dye are oriented in a constant direction is generally used.
- the polyvinyl alcohol-based polarizing film is prepared by dyeing a polyvinyl alcohol-based film with iodine or dichroic dye, and then stretching and crosslinking in a predetermined direction, wherein the stretching process is an aqueous solution of boric acid or an iodine solution. Wet drawing carried out in solution or dry drawing carried out in air, and the like, and the draw ratio is generally at least 5 times.
- stretching exceeds 60 micrometers.
- the thickness of the polyvinyl alcohol-based film before stretching is 60 ⁇ m or less, the swelling degree of the polyvinyl alcohol-based film increases, so that the side ends in the direction perpendicular to the stretching direction of the film are easily dried, and the dried portion adheres to the film surface. This may be caused by an uneven phenomenon or due to the thin thickness, so that the modulus acting per unit area in the stretching process may increase, so that breakage may occur easily.
- polarizers also need to have a thinner thickness.
- a polyvinyl alcohol-based film having a thickness before stretching of more than 60 ⁇ m as in the prior art there is a limit in reducing the thickness of the polarizer. Therefore, studies have been attempted to fabricate thinner polarizers.
- the polyvinyl alcohol resin is manufactured by melting and extruding the polyvinyl alcohol resin or by applying the coating solution after coating and then applying the polyvinyl alcohol according to extrusion conditions, coating conditions or film forming conditions. It is easy to change the physical properties of the film, the physical properties of the finally produced polyvinyl alcohol has a limit that the polyvinyl alcohol-based stretching properties vary depending on the substrate properties.
- the present invention has been made to solve the above problems, and after forming auxiliary supports at both side ends of the width direction (TD) of the unstretched polyvinyl alcohol-based film, by stretching by wet stretching, high-strength stretching can be achieved even by single stretching. It is possible to provide a method of manufacturing a thin polarizer having excellent physical properties.
- the present invention comprises the steps of forming auxiliary supports on both side ends of the width direction (TD) of the unstretched polyvinyl alcohol-based film and the thickness of the polyvinyl alcohol-based film is 10 ⁇ m or less It provides a method for producing a thin polarizer comprising the step of wet stretching the polyvinyl alcohol-based film having the auxiliary support is formed in the longitudinal direction (MD).
- the auxiliary support is polyvinyl alcohol-based resin, low density polyethylene resin, high density polyethylene resin, copolymer resin containing ethylene vinyl acetate in high density polyethylene, polypropylene resin, polyethylene terephthalate resin containing isophthalic acid, water-soluble cellulose resin And it may be a polymer film containing one or more selected from the group consisting of acrylic resins.
- the auxiliary support is preferably a polymer film having a glass transition temperature of 30 °C to 60 °C, it is preferable that the shrinkage after wet stretching is 3.0% or less.
- the auxiliary support may be formed on at least one of the upper and lower surfaces of both side end portions in the width direction (TD) of the unstretched polyvinyl alcohol-based film.
- the forming of the auxiliary support may include attaching the polymer film to both side ends of the width direction TD of the unstretched polyvinyl alcohol-based film through an adhesive and drying the adhesive film.
- auxiliary support can be used to fold both side ends of the width direction (TD) of the unstretched polyvinyl alcohol-based film directly to attach through an adhesive and then dry.
- the ratio of the width of the auxiliary support to the width of the unstretched polyvinyl alcohol-based film may be 0.06 to 0.25.
- the method may further include separating the auxiliary support from the polyvinyl alcohol-based film after wet stretching the polyvinyl alcohol-based film on which the auxiliary support is formed in the longitudinal direction (MD).
- the present invention provides a thin polarizer having a thickness of 10 ⁇ m or less, a single transmittance of 40 to 43%, a polarization degree of 99% or more, and a polarizing plate including the same.
- the manufacturing method of the present invention in the method of manufacturing a thin polarizer using wet stretching, it is possible to stretch at a high magnification with a single film, and has a thickness of 10 ⁇ m or less without curling and breaking phenomenon at both ends of the film. Can be produced with high productivity.
- FIG. 1 is a cross-sectional view showing an example of a polyvinyl alcohol-based film having an auxiliary support of the present invention.
- FIG. 2 is a plan view illustrating an example of a polyvinyl alcohol-based film having an auxiliary support of the present invention.
- the inventors of the present invention have repeatedly studied to develop a method of manufacturing a thin polarizer capable of stretching at high magnification while wet stretching a polyvinyl alcohol-based film alone, and thus, the amount of the width direction (TD) of the unstretched polyvinyl alcohol-based film.
- TD width direction
- One aspect of the present invention comprises the steps of forming auxiliary supports on both side ends of the width direction (TD) of the unstretched polyvinyl alcohol-based film; And wet stretching a polyvinyl alcohol-based film having the auxiliary support formed therein such that the thickness of the polyvinyl alcohol-based film is 10 ⁇ m or less in a longitudinal direction (MD).
- the unstretched polyvinyl alcohol-based film in the step of forming auxiliary supports at both side ends of the width direction (TD) of the unstretched polyvinyl alcohol-based film, is not limited thereto, but the degree of polymerization It is preferably about 1,000 to 10,000, preferably about 1,500 to 5,000. This is because when the degree of polymerization satisfies the above range, the molecular motion is free and can be mixed flexibly with iodine or dichroic dye.
- the unstretched polyvinyl alcohol-based film has a thickness of about 10 to 60 ⁇ m, preferably about 10 to 40 ⁇ m.
- the thickness of the polyvinyl alcohol-based film exceeds 60 ⁇ m, it is difficult to achieve a thickness of less than 10 ⁇ m even when stretched, when the thickness is less than 10 ⁇ m tends to break during stretching.
- the unstretched polyvinyl alcohol-based film of the present invention a commercially available polyvinyl alcohol-based film may be used.
- a commercially available polyvinyl alcohol-based film may be used.
- P30, PE20, PE30, PE60 manufactured by Kureray Co., Ltd., M1000, M1500, M2005, M3000, M6000 and the like can be used.
- the auxiliary support may be formed of a polymer film, for example, polyvinyl alcohol-based resin, low density polyethylene resin, high density polyethylene resin, copolymer resin containing ethylene vinyl acetate in high density polyethylene, polypropylene resin, iso It may be a polymer film including one or more selected from the group consisting of polyethylene terephthalate resin, soluble cellulose resin, and acrylic resin containing phthalic acid, but is not limited thereto.
- the polymer film is preferably a polymer film formed of a polyvinyl alcohol-based resin, and in particular, a polymer film having the same or similar component as the unstretched polyvinyl alcohol-based film that is the base film is most preferred. This is because when the polyvinyl alcohol-based film is stretched after the auxiliary support is attached, the same or similar stretching behavior is secured between the polyvinyl alcohol-based film and the polymer film, so that not only physical damage such as warping or breaking, but also optical characteristics are different. This is because it is possible to prevent the phenomenon that is lost or distorted.
- the auxiliary support is preferably a polymer film having a glass transition temperature of about 20 ° C to 80 ° C, more preferably about 30 ° C to 60 ° C.
- the film may have proper fluidity during stretching, and thus may sufficiently serve as a support, and does not interfere with the stretching of the polyvinyl alcohol-based film, and thus the stretching efficiency is excellent. Has the advantage.
- the auxiliary support is preferably a shrinkage of 3.0% or less, more preferably 1.0% or less after wet stretching in the longitudinal direction (MD) as described below.
- MD longitudinal direction
- the shrinkage of the auxiliary support satisfies the above range, after the polyvinyl alcohol-based film and the auxiliary support is stretched, twisting, breaking or end curling This is because the same damage can be prevented.
- the contraction rate of the auxiliary support is fixed by stretching the auxiliary support film to the stretching machine and stretched 6 times, and after measuring the final length of the film, removing the tension of the stretching machine to measure the change rate of the film shrinkage after 10 minutes You can see how.
- the auxiliary support may be formed on at least one of the upper and lower surfaces of both side ends of the width direction (TD) of the unstretched polyvinyl alcohol-based film, even if formed on the upper surface or the lower surface, or both sides Irrelevant
- the less stretched polyvinyl alcohol-based film is more susceptible to moisture, the easier it is also affected by the moisture present in the air.
- the swelling of the film occurs more quickly by the moisture, the rigidity is lowered by the swelling and the volume increases, and it becomes mushy.
- tension is generated in the longitudinal direction MD in this state, the film is dried and folded while passing through a nip roll.
- the thickness of the auxiliary support is added to both side ends of the width direction (TD) which is a direction perpendicular to the stretching direction.
- the swelling speed can be slowed down to reduce drying.
- the unstretched polyvinyl alcohol-based film and the polymer film serving as an auxiliary support may be attached by a weak attraction force or may be attached through an aqueous adhesive, but may be interposed with an adhesive to secure mutual adhesion and process stability. It is more preferable.
- the step of forming the auxiliary support preferably comprises a step of attaching the polymer film through the adhesive on both side ends in the direction perpendicular to the stretching direction of the unstretched polyvinyl alcohol-based film, and drying. .
- an adhesive layer may be formed at both side ends of the width direction TD of the unstretched polyvinyl alcohol-based film.
- the thickness of the adhesive layer is preferably about 70nm to 100nm, it is preferable that the viscosity is formed by the water-based adhesive of 4cP to 50cP.
- it may be formed by an aqueous adhesive including at least one selected from the group consisting of polyvinyl alcohol-based resins, acrylic resins, and vinyl acetate-based resins, wherein the adhesive layer has a polymerization degree of 500 to 1800 and a solid content. 2 to 10% by weight of the water-based adhesive can be formed.
- a polyvinyl alcohol-based adhesive is preferred, and a modified polyvinyl alcohol adhesive including an acetoacetyl group is particularly preferable.
- Specific examples of the polyvinyl alcohol-based adhesive may include, but are not limited to, Japan Synthetic Chemicals Gohsefiner Z-100, Z-200, Z-200H, Z-210, Z-220, Z-320, and the like.
- the polymer film is attached to the adhesive layer formed by the adhesive, and the method of attaching the polymer film may be performed by a method well known in the art.
- the drying step is preferably dried in an oven for at least 1 minute at a relatively low temperature of 40 °C to 50 °C.
- the drying temperature is higher than the above range, the moisture evaporation amount of the polyvinyl alcohol-based film increases, wrinkles occur on the surface of the film, and the stretchability is lowered.
- the auxiliary support may be formed by directly folding both side ends of the unstretched polyvinyl alcohol-based film and attaching the adhesive through an adhesive, rather than attaching a separate polymer film.
- the auxiliary support since the auxiliary support of the same kind as the unstretched polyvinyl alcohol-based film is formed, it has the same components and similar stretching behavior is particularly preferable.
- the auxiliary support stand in the both side end part of the width direction TD of an unstretched polyvinyl alcohol-type film.
- the auxiliary support is formed on both side end portions of the width direction (TD) which is a direction perpendicular to the stretching direction.
- the auxiliary supports formed on both side end portions of the width direction TD have a constant width and are attached to the same direction and the same length as the longitudinal direction MD of the polyvinyl alcohol-based film.
- the length and width of the unstretched polyvinyl alcohol-based film are referred to as V 0 and W 0 , respectively, and the length and width of the auxiliary support are referred to as V and W, respectively.
- the ratio of the width of the auxiliary support to the width of the unstretched polyvinyl alcohol-based film that is, W / W 0 is preferably about 0.06 to 0.25, and more preferably about 0.08 to 0.20.
- W / W 0 value is less than 0.06, the side end portion folding and breaking occurs because it does not serve as an auxiliary support, and when the W / W 0 value is greater than 0.25, when the unstretched polyvinyl alcohol-based film is stretched, the width shrinkage is inhibited. There is a problem that can not obtain sufficient optical properties.
- the length of the auxiliary support is preferably the same as the length of the polyvinyl alcohol-based film.
- the stretching direction is the longitudinal direction (MD) of the film, wherein the auxiliary support is characterized in that formed on both side ends of the width direction (TD), characterized in that it is performed by a wet stretching method.
- the wet stretching step is mainly divided into a tender stretching method or a roll-to-roll stretching method, and the like, and dyeing iodine and / or dichroic dye on a polyvinyl alcohol-based film and / or the dyed iodine and / or dichroic dye. May be carried out together with at least one of the steps of crosslinking the polyvinyl alcohol-based film.
- the thin polarizer manufacturing method according to the present invention like a conventional polarizer manufacturing method, includes a swelling step, a dyeing step, a crosslinking step, an stretching step, a washing step and a drying step.
- the method of manufacturing the thin polarizer of the present invention by wet stretching is not limited thereto.
- the remaining steps except the drying step are performed in a state in which the unstretched polyvinyl alcohol-based film is immersed in a constant temperature bath filled with at least one solution selected from several kinds of solutions.
- the order of the steps and the number of repetitions are not particularly limited, and the steps may be performed simultaneously or sequentially, and some steps may be omitted.
- the stretching step may be performed before the dyeing step or after the dyeing step, or may be performed simultaneously with the swelling step or the dyeing step.
- the swelling step is immersed in a swelling tank filled with an swelling aqueous solution before dyeing the unstretched polyvinyl alcohol-based film, to remove impurities such as dirt or antiblocking agent deposited on the surface of the polyvinyl alcohol-based film, and polyvinyl alcohol-based It is a step for improving the physical properties of the polarizer by swelling the film to improve the stretching efficiency and to prevent dyeing unevenness.
- aqueous solution for swelling water (pure water, deionized water) can be usually used alone, and when a small amount of glycerin or potassium iodide is added thereto, the processability can be improved together with the swelling of the polymer film. It is preferable that content of glycerin is 5 weight% or less with respect to 100 weight% of aqueous solutions for swelling, and content of potassium iodide is 10 weight% or less.
- the temperature of a swelling tank is 20 degreeC-45 degreeC, More preferably, it is 25 degreeC-40 degreeC.
- the execution time (swelling tank dipping time) of the swelling step is preferably 180 seconds or less, and more preferably 90 seconds or less.
- the immersion time is within the above range, the swelling can be prevented from becoming saturated due to excessive swelling, preventing breakage due to softening of the polyvinyl alcohol-based film, and the adsorption of iodine is uniform in the dyeing step, thereby improving the degree of polarization. .
- the swelling step may be omitted, and swelling may be performed simultaneously in the following dyeing step.
- the dyeing step is a step of adsorbing iodine to the polyvinyl alcohol-based film by immersing the polyvinyl alcohol-based film in a dye bath filled with a dichroic material, for example, an aqueous solution for dyeing containing iodine.
- a dichroic material for example, an aqueous solution for dyeing containing iodine.
- the dyeing aqueous solution may include water, a water-soluble organic solvent or a mixed solvent and iodine thereof.
- iodide may be further included as a dissolution aid.
- potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, barium iodide, calcium iodide, tin iodide, titanium iodide, etc. may be used alone or in combination of two or more thereof. Of these, potassium iodide is preferred in view of its high solubility in water.
- the temperature of a dye bath is 5 degreeC-42 degreeC, More preferably, it is 10-35 degreeC.
- the immersion time of the polyvinyl alcohol-based film in the dyeing tank is not particularly limited, preferably 1 to 20 minutes, more preferably 2 to 10 minutes.
- the crosslinking step is a step of fixing the adsorbed iodine molecules by immersing the dyed polyvinyl alcohol-based film in an aqueous solution for crosslinking so that the dyeability by physically adsorbed iodine molecules is not lowered by the external environment.
- Dichroic dyes are not frequently eluted in a moisture resistant environment, but iodine is often dissolved or sublimed depending on the environment when the crosslinking reaction is unstable, so sufficient crosslinking reaction is required.
- the crosslinking step is important because it generally has to be drawn at the largest draw ratio in the crosslinking step.
- the stretching step may be performed together with the crosslinking step, in which case the unstretched polyvinyl alcohol-based film is stretched in the longitudinal direction (MD).
- the stretching is preferably carried out so that the thickness of the polyvinyl alcohol-based film is less than 10 ⁇ m, more preferably less than 8 ⁇ m.
- it may be performed at a draw ratio of about 4 to 9 times, preferably about 5 to 7 times, at a temperature of about 20 ° C to 85 ° C, preferably about 40 ° C to 65 ° C.
- the fluidity of the polyvinyl alcohol-based film chain may be lowered, and thus, the stretching efficiency may be reduced.
- the temperature is higher than 85 ° C.
- the polyvinyl alcohol-based film may be softened to weaken the strength.
- the orientation of the chain may not sufficiently occur at a draw ratio of less than 4 times, the polyvinyl alcohol-based film chain may be cut at a draw ratio of more than 9 times.
- the stretching step may be performed together with the swelling step, the dyeing step, and the crosslinking step, or may be performed as an independent stretching step using a separate drawing tank filled with an aqueous solution for drawing after the crosslinking step.
- the washing step is a step of removing the unnecessary residue such as a crosslinking agent attached to the polyvinyl alcohol-based film in the previous steps by immersing the polyvinyl alcohol-based film completed crosslinking and stretching in a washing tank filled with a water solution for washing.
- the washing step may be omitted and may be performed whenever previous steps such as dyeing step, crosslinking step or stretching step are completed. In addition, it may be repeated one or more times, and the number of repetitions is not particularly limited.
- the aqueous solution for washing may be water, iodide may be further added thereto, the temperature of the washing tank is preferably 10 °C to 60 °C, more preferably 15 °C to 40 °C.
- the drying step is a step of obtaining a polarizer having excellent optical properties by drying the washed polyvinyl alcohol-based film and further improving the orientation of the salted iodine molecules.
- a drying method methods such as natural drying, air drying, heat drying, far infrared drying, microwave drying, and hot air drying may be used. Recently, microwave drying for activating and drying only water in a film is newly used. Drying is mainly used. For example, hot air drying may be performed at 20 ° C. to 90 ° C. for 1 minute to 10 minutes.
- the drying temperature is preferably low in order to prevent deterioration of the polarizer, more preferably 80 ° C. or less, and most preferably 60 ° C. or less.
- the step of wet stretching the polyvinyl alcohol-based film in which the auxiliary support is formed in the longitudinal direction (MD) may further comprise the step of separating the auxiliary support from the polyvinyl alcohol-based film.
- the separating may be performed by applying a peel force to the polyvinyl alcohol-based film or the auxiliary support to separate from each other, or may be performed by cutting both side ends of the polyvinyl alcohol-based film on which the auxiliary support is formed. have.
- the polarizer manufacturing method according to the present invention despite being a single film, it is characterized in that the stretching of the side end portion of the film and the phenomenon of breaking in the wet stretching process can be stretched at a high magnification.
- the polarizer manufacturing method according to the present invention has a maximum draw ratio of 7.3 or more and has improved performance compared to the maximum draw ratio of a conventional single film.
- the present invention provides a polarizer manufactured by the above manufacturing method.
- the polarizer of the present invention produced by the above method is very thin, the thickness of which is about 10 ⁇ m or less, preferably about 1 ⁇ m to 10 ⁇ m, more preferably about 3 ⁇ m to 10 ⁇ m.
- the unitary transmittance is about 40% to 43%, and the polarization degree is 99% or more, indicating very excellent optical properties.
- the present invention provides a polarizing plate in which a protective film is laminated on at least one surface of the polarizer.
- the polarizing plate may be formed by laminating a transparent film on one or both surfaces of the polarizer of the present invention as described above.
- various films used in the art as a polarizer protective film or a retardation film may be used without limitation, for example, polyester polymer, styrene polymer, cellulose polymer, polyether sulfone type Polymer, polycarbonate polymer, acrylic polymer, polyolefin polymer, polyamide polymer, polyimide polymer, sulfone polymer, polyether sulfone polymer, polyether ether ketone polymer, polyphenylene sulfide polymer, vinyl Films comprising at least one selected from the group consisting of alcohol polymers, vinylidene chloride polymers, vinyl butyral polymers, arylate polymers, polyoxy methylene polymers, epoxy polymers and mixtures of these polymers can be used. .
- the method of laminating the polarizer and the transparent film is not particularly limited, and may be performed using an adhesive or an adhesive well known in the art.
- the pressure-sensitive adhesive or adhesive may be appropriately selected in consideration of the material of the transparent film to be used, for example, when using a TAC as a transparent film, an aqueous adhesive such as a polyvinyl alcohol-based adhesive may be used, When using an acrylic film, a COP film, etc. as a transparent film, photocuring or thermosetting adhesives, such as an acrylic adhesive and an epoxy adhesive, can be used.
- the polarizing plate of the present invention preferably further has an adhesive layer in order to facilitate lamination to a liquid crystal cell or the like, and may be disposed on one side or both sides of the polarizing plate.
- the adhesive may be sufficiently cured by heat or ultraviolet rays after adhesion, and thus the mechanical strength may be improved to an adhesive level.
- the adhesive strength is also large, so that the adhesive does not peel off without breakage of either film to which the adhesive is attached. It is desirable to have.
- the adhesive which can be used is excellent in optical transparency, and it is preferable to show the adhesive characteristic of moderate wettability, cohesion, or adhesiveness.
- the adhesive etc. which suitably prepared polymers, such as an acryl-type polymer, a silicone type polymer, polyester, a polyurethane, a polyether, synthetic rubber, as a base polymer, are mentioned.
- a primer layer or an adhesive layer may be further included between the adhesive layer and the polyvinyl alcohol-based polarizer and / or between the adhesive layer and the transparent film.
- Auxiliary supports using the same film as the polyvinyl alcohol film
- a stretched film After drying for 1 minute in a 40 °C oven to prepare a stretched film.
- the width (Wo) of the polyvinyl alcohol film and the width (W) of the auxiliary support are as shown in Table 1 below.
- the stretched film is dyed in 0.15 wt% of iodine for 20 seconds, and then stretched about 2 times in a 1 wt% aqueous solution of boric acid.
- the film was finally stretched 6-fold in a 2 wt% aqueous solution of boric acid, immersed in a 5 wt% aqueous solution of KI for 15 seconds, and then dried in a 50 ° C. oven for 3 minutes to prepare a polarizer.
- Polyvinyl alcohol (M2005 grade 20 ⁇ ⁇ ) film fabric was dyed in 0.15 wt% of iodine for 20 seconds, and then stretched about 2 times in 1 wt% aqueous solution of boric acid. Thereafter, the film was drawn 6 times in a 2 wt% aqueous solution of boric acid, immersed in a 5 wt% aqueous solution of KI for 15 seconds, and dried for 3 minutes in an oven at 50 ° C. to prepare a polarizer.
- the single transmittance means the transmittance of a single polarizer, and the polarization degrees are orthogonal to each other so that the parallel transmittance (Tp) and the absorption axis obtained when the two polarizers are arranged in parallel with the absorption axes are 90 °. It is defined by the following formula 1 by the orthogonal transmittance Tc obtained after.
- W width of auxiliary support
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
Description
분류 | PVA필름 및 지지체 | 편광자(연신비 6배)의 물성 | |||||
PVA 폭(mm) | 보조 지지대 폭 (mm) | 최대 연신비 | 폭 (mm) | 두께(㎛) | 단체 투과도 (%) | 편광도 (%) | |
실시예1 | 80 | 5 | 7.3 | 42 | 4.5 | 41.72 | 99.9861 |
실시예2 | 80 | 10 | 7.7 | 43 | 4.2 | 41.50 | 99.9834 |
실시예3 | 80 | 20 | 8.3 | 47 | 3.5 | 41.48 | 99.9684 |
비교예1 | 80 | - | 7.2 | 42 | 4.5 | 41.64 | 99.9870 |
Claims (13)
- 미연신 폴리비닐알코올계 필름의 폭 방향(TD)의 양 측단부에 보조 지지대를 형성하는 단계; 및상기 폴리비닐알코올계 필름의 두께가 10㎛ 이하가 되도록 상기 보조 지지대가 형성된 폴리비닐알코올계 필름을 길이 방향(MD)으로 습식 연신하는 단계를 포함하는 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대는 폴리비닐알코올계 수지, 저밀도 폴리에틸렌 수지, 고밀도 폴리에틸렌 수지, 고밀도 폴리에틸렌에 에틸렌 비닐아세테이트가 함유된 공중합체 수지, 폴리프로필렌 수지, 이소프탈산을 함유한 폴리에틸렌테레프탈레이트 수지, 수용성 셀룰로오스 수지 및 아크릴 수지로 이루어진 군으로부터 선택된 1종 이상을 포함하는 고분자 필름인 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대는 유리전이온도가 20℃ 내지 80℃ 인 고분자 필름인 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대는 습식 연신 후 수축율이 3.0% 이하인 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대는 미연신 폴리비닐알코올계 필름의 폭 방향(TD)의 양 측단부의 상면 및 하면 중 적어도 어느 한 면에 형성되는 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대를 형성하는 단계는 미연신 폴리비닐알코올계 필름의 폭 방향(TD)의 양 측단부에 접착제를 개재하여 고분자 필름을 부착한 후, 건조하는 단계를 포함하는 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대는 미연신 폴리비닐알코올계 필름의 폭 방향(TD)의 양 측단부를 직접 접어서 접착제를 개재하여 부착한 후 건조한 것인 박형 편광자의 제조 방법.
- 제6항에 있어서,상기 접착제는 점도가 4cP 내지 50cP인 수계 접착제를 사용하는 것인 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 미연신 폴리비닐알코올계 필름의 폭에 대하여 상기 보조 지지대의 폭의 비가 0.06 내지 0.25인 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대가 형성된 폴리비닐알코올계 필름을 길이 방향(MD)으로 습식 연신하는 단계 20℃ 내지 85℃의 온도에서 4배 내지 9배의 연신 배율로 수행되는 것인 박형 편광자의 제조 방법.
- 제1항에 있어서,상기 보조 지지대가 형성된 폴리비닐알코올계 필름을 길이 방향(MD)으로 습식 연신하는 단계 이후에 상기 보조 지지대를 상기 폴리비닐알코올계 필름으로부터 분리하는 단계를 더 포함하는 박형 편광자의 제조 방법.
- 청구항 1 내지 청구항 11 중 어느 한 항의 방법으로 제조되며,두께가 10㎛ 이하이고, 단체 투과도 40% 내지 43%이며, 편광도가 99% 이상인 박형 편광자.
- 청구항 12의 박형 편광자를 포함하는 편광판.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016545683A JP6284170B2 (ja) | 2013-09-30 | 2014-09-23 | 薄型偏光子の製造方法、これを用いて製造された薄型偏光子および偏光板 |
CN201480053832.8A CN105637392B (zh) | 2013-09-30 | 2014-09-23 | 薄偏振片的制备方法,使用该方法制备的薄偏振片,及偏振板 |
US15/025,037 US10101513B2 (en) | 2013-09-30 | 2014-09-23 | Method for manufacturing thin polarizer, thin polarizer manufactured using same, and polarizing plate |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2013-0117008 | 2013-09-30 | ||
KR20130117008 | 2013-09-30 | ||
KR10-2014-0123603 | 2014-09-17 | ||
KR1020140123603A KR101621161B1 (ko) | 2013-09-30 | 2014-09-17 | 박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015046858A1 true WO2015046858A1 (ko) | 2015-04-02 |
Family
ID=52743904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2014/008836 WO2015046858A1 (ko) | 2013-09-30 | 2014-09-23 | 박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2015046858A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9958442B2 (en) | 2009-02-11 | 2018-05-01 | Duke University | Sensors incorporating antibodies and methods of making and using the same |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100102291A (ko) * | 2009-03-11 | 2010-09-24 | 동우 화인켐 주식회사 | 박형 편광자의 제조방법, 박형 편광자 및 이것이 구비된 편광판 |
KR20100102292A (ko) * | 2009-03-11 | 2010-09-24 | 동우 화인켐 주식회사 | 편광자의 제조방법, 편광자 및 이것이 구비된 편광판 |
JP2012073580A (ja) * | 2010-09-03 | 2012-04-12 | Nitto Denko Corp | 薄型偏光膜の製造方法 |
JP2013011837A (ja) * | 2010-09-03 | 2013-01-17 | Nitto Denko Corp | 薄型偏光膜、薄型偏光膜を有する光学積層体、および薄型偏光膜の製造方法 |
-
2014
- 2014-09-23 WO PCT/KR2014/008836 patent/WO2015046858A1/ko active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100102291A (ko) * | 2009-03-11 | 2010-09-24 | 동우 화인켐 주식회사 | 박형 편광자의 제조방법, 박형 편광자 및 이것이 구비된 편광판 |
KR20100102292A (ko) * | 2009-03-11 | 2010-09-24 | 동우 화인켐 주식회사 | 편광자의 제조방법, 편광자 및 이것이 구비된 편광판 |
JP2012073580A (ja) * | 2010-09-03 | 2012-04-12 | Nitto Denko Corp | 薄型偏光膜の製造方法 |
JP2013011837A (ja) * | 2010-09-03 | 2013-01-17 | Nitto Denko Corp | 薄型偏光膜、薄型偏光膜を有する光学積層体、および薄型偏光膜の製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9958442B2 (en) | 2009-02-11 | 2018-05-01 | Duke University | Sensors incorporating antibodies and methods of making and using the same |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2016003107A1 (ko) | 편광판의 제조방법 및 편광판 | |
WO2016056803A1 (ko) | 편광판의 제조방법 및 이를 이용하여 제조된 편광판 | |
WO2015147551A1 (ko) | 국지적 탈색 영역을 포함하는 편광 부재의 제조 방법, 편광 부재 롤의 제조 방법 및 매엽형 편광 부재의 제조 방법 | |
WO2014204150A1 (ko) | 연신 적층체, 박형 편광자의 제조 방법, 이를 이용하여 제조되는 박형 편광자 및 이를 포함하는 편광판 | |
WO2014204148A1 (ko) | 연신 적층체, 박형 편광자의 제조 방법, 이를 이용하여 제조되는 박형 편광자 및 이를 포함하는 편광판 | |
WO2014204134A1 (ko) | 박형 편광판 및 그의 제조 방법 | |
WO2010090449A2 (ko) | 내구성 및 내열성이 우수한 편광소자, 편광판 및 화상표시장치 | |
WO2016105017A1 (ko) | 광학필름 및 이를 구비한 oled 표시장치 | |
WO2015064946A1 (ko) | 적층체, 이를 이용하는 박형 편광자의 제조 방법, 박형 편광자 및 편광판 | |
WO2014204154A1 (ko) | 연신 적층체, 박형 편광자의 제조 방법, 이를 이용하여 제조되는 박형 편광자 및 이를 포함하는 편광판 | |
WO2014077636A1 (ko) | 박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 | |
WO2013180504A1 (ko) | 수지 조성물, 이를 이용하여 형성된 광학 필름, 이를 포함하는 편광판 및 액정 표시 장치 | |
WO2016195440A1 (ko) | 편광자의 제조방법 및 이를 이용하여 제조된 편광자 | |
WO2019083160A1 (ko) | 액정 위상차 필름, 이를 포함하는 발광표시장치용 편광판 및 이를 포함하는 발광표시장치 | |
WO2014204132A1 (ko) | 광학 물성이 우수한 박형 편광자, 그 제조 방법, 이를 포함하는 편광판 및 디스플레이 장치 | |
WO2012002662A2 (ko) | 편광자의 제조방법 | |
WO2014204151A1 (ko) | 연신 적층체, 박형 편광자의 제조 방법, 이를 이용하여 제조되는 박형 편광자 및 이를 포함하는 편광판 | |
WO2014077599A1 (ko) | 박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 | |
WO2015046858A1 (ko) | 박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 | |
WO2017078290A1 (ko) | 편광판 및 이를 포함하는 액정 표시 장치 | |
WO2020184862A1 (ko) | 편광판 및 이를 포함하는 광학표시장치 | |
WO2015046765A1 (ko) | 편면형 박형 편광판의 제조방법 | |
WO2013191418A1 (ko) | 편광판 및 이를 포함하는 액정표시장치 | |
WO2014088273A1 (ko) | 편광판 및 이를 포함하는 액정표시장치 | |
KR101621161B1 (ko) | 박형 편광자의 제조 방법, 이를 이용하여 제조된 박형 편광자 및 편광판 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14848597 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15025037 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2016545683 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14848597 Country of ref document: EP Kind code of ref document: A1 |