KR0155039B1 - Method for manufacturing polarized light film - Google Patents
Method for manufacturing polarized light filmInfo
- Publication number
- KR0155039B1 KR0155039B1 KR1019950028036A KR19950028036A KR0155039B1 KR 0155039 B1 KR0155039 B1 KR 0155039B1 KR 1019950028036 A KR1019950028036 A KR 1019950028036A KR 19950028036 A KR19950028036 A KR 19950028036A KR 0155039 B1 KR0155039 B1 KR 0155039B1
- Authority
- KR
- South Korea
- Prior art keywords
- film
- polarizing film
- cellulose
- adhesive
- polarizing
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
- B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B23/08—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/04—Time
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/028—Treatment by energy or chemical effects using vibration, e.g. sonic or ultrasonic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
본 발명은 셀룰로오즈계 필름의 한면 또는 양면에 코로나 처리하고 순수중에서 10~30초간 초음파 처리하여 건조한 보호층을 접착제를 사용하여 폴리 비닐 알콜계의 편광 필름에 접착시킨 것을 특징으로 하는 편광 필름의 제조 방법에 관한 것으로 편광 필름의 뒤틀림 현상을 방지하여 치수 안정성이 우수하고 고온, 고습 조건에서도 그 기능을 충분히 발휘할 수 있을 뿐만 아니라 대형 표시부에 적용될 수 있는 특징이 있다.The present invention is a method for producing a polarizing film, characterized in that the corona treatment on one or both sides of the cellulose-based film and the ultrasonic treatment in pure water for 10-30 seconds to adhere the dry protective layer to the polyvinyl alcohol polarizing film using an adhesive. It is related to the excellent dimensional stability by preventing the warping phenomenon of the polarizing film, and can fully exhibit its function even under high temperature, high humidity conditions, there is a feature that can be applied to a large display.
Description
본 발명은 셀룰로오즈계 필름을 보호층으로 하는 편광 필름의 제조 방법에 관한 것으로, 본 발명에 의해 제조된 편광 필름은 뒤틀림 현상이 발생하지 않아 치수 안정성이 우수하고 고온, 다습 조건에서도 그 기능을 충분히 발휘할 수 있을 뿐만 아니라 대형 표시부에 적용될 수 있는 특징이 있다.The present invention relates to a method for producing a polarizing film having a cellulose-based film as a protective layer, and the polarizing film produced by the present invention does not generate warpage, so that the dimensional stability is excellent and its function can be sufficiently exhibited even at high temperature and high humidity conditions. Not only can there be a feature that can be applied to a large display.
편광 필름은 종래 전자 계산기 또는 시계 등의 소형 제품의 표시부에 주로 사용되었으나, 현재에는 자동차용 계기판, 사무자동화기기의 표시부, 액정 텔레비젼 등 대형 제품으로 사용이 확대되고 있다. 그러나, 자동차용 계기판이나 사무 자동화 기기의 표시부에 적용되는 편광 필름의 경우, 전자 게산기나 시계 등의 표시부로 사용되는 경우보다 환경 조건이 매우 까다로운 것이다. 예를 들면, 여름철 자동차의 내부 온도는 고온이고, 습도가 높아 이러한 환경 조건하에서도 그 기능을 발휘할 수 있는 치수 안정성, 내구성 및 열 안정성 등이 부가적으로 요구된다.BACKGROUND ART Polarizing films have been mainly used for display parts of small products such as electronic calculators or watches, but now, their use has been expanded to large products such as automotive instrument panels, display devices for office automation equipment, and liquid crystal televisions. However, in the case of a polarizing film applied to a display portion of an automobile instrument panel or an office automation device, environmental conditions are very demanded than those used as a display portion such as an electronic calculator or a clock. For example, the internal temperature of a summer car is high temperature, high humidity, additionally requires dimensional stability, durability and thermal stability that can exhibit its function even under these environmental conditions.
편광 필름의 내구성 및 치수 안정성을 높이는 종래의 방법으로는 크게 3가지로 분류된다. 첫번째는 폴리비닐알콜계 필름 자체의 개질에 의하여 내구성을 높이는 방법이 있으며, 두번째는 승화성이 있는 요오드계 편광자 대신 비승화성의 이색성 염료를 사용함으로써 내열성을 높이는 방법이 있고, 세번째는 폴리비닐알콜계 필름에 보호층으로 트리아세테이트 셀룰로오즈 (이하, TAC라 칭함) 필름 또는 폴리에스테르 필름을 고온, 고습 조건에서 후처리함으로써 내구성을 높이는 방법 등이 알려져 있다.Conventional methods for enhancing the durability and dimensional stability of the polarizing film are classified into three types. The first is to improve the durability by the modification of the polyvinyl alcohol-based film itself, the second is to increase the heat resistance by using a non-sublimable dichroic dye instead of the sublimable iodine polarizer, and the third is polyvinyl alcohol A method of increasing durability by post-treating a triacetate cellulose (hereinafter referred to as TAC) film or polyester film in a high temperature and high humidity condition as a protective layer to a system film is known.
이중 첫번째 방법은 폴리비닐알콜(이하 PVA라 칭함)의 개질로 인하여 편광자(요오드 또는 이색성 염료)가 폴리머 매트릭스 상에 충분히 흡착되지 않아 편광도가 낮아지거나 매트릭스의 개질(공중합 및 블랜딩)에 의해 편광 필름의 투명도가 떨어지는 단점이 있으며, 두번째 방법인 비승화성 염료를 편광자로 사용하는 경우, 요오드계 편광 필름보다 우수한 내구성의 편광 필름을 제조할 수 있으나, PVA 연신시 염료의 배향 조절이 쉽지 않아 충분한 편광도를 얻지 못하는 문제점이 있다.The first method is that the polarizer (iodine or dichroic dye) is not sufficiently adsorbed on the polymer matrix due to the modification of polyvinyl alcohol (hereinafter referred to as PVA) or the polarization film is lowered due to the modification of the matrix (copolymerization and blending). In the case of using a non-sublimable dye, which is a second method, as a polarizer, a polarizing film having a higher durability than an iodine-based polarizing film can be manufactured, but it is not easy to control the orientation of the dye during PVA stretching. There is a problem that you do not get.
또한 세번째 방법인 보호층으로 폴리에스테르 필름을 사용할 경우에는 TAC 필름을 사용한 편광 필름보다 우수한 편광 필름을 얻을 수 있으나, 광학 특성 측면에서 폴리에스테르 필름은 연신에 의한 광학이방성을 나타내므로 액정표시 소자의 대형화시 복굴절에 의한 광간섭 무늬가 발생되어 화면의 콘트라스트를 저해하는 단점이 있다.In addition, when a polyester film is used as a protective layer, which is the third method, a polarizing film superior to a polarizing film using a TAC film can be obtained. However, in view of optical properties, the polyester film exhibits optical anisotropy due to stretching, thereby making the LCD larger Optical interference pattern due to birefringence is generated, which has the disadvantage of inhibiting the contrast of the screen.
한편, 셀룰로오즈계 필름은 제조시에 가소제를 사용하여 유연법에 의해 제조되므로, 가소제를 별도로 처리하지 않고 사용할 경우 표면장력이 높아 접착제의 고른 분포가 어려워지며, 보호층으로 접착된 이후 보호층 내부의 가소제가 휘발됨으로써 편광 필름 자체의 변형이 발생하는 문제점이 생기게 된다.On the other hand, since the cellulose-based film is manufactured by a plasticizing method using a plasticizer at the time of manufacture, even if the plasticizer is used without treatment separately, high surface tension makes it difficult to evenly distribute the adhesive, and after bonding with the protective layer, When the plasticizer is volatilized, there is a problem that deformation of the polarizing film itself occurs.
따라서, 셀룰로오즈계 필름의 표면 장력을 낮추고 가소제를 제거하지 않으면 차량용 및 사무자동화용기기를 대형 액정 표시 소자에 적용할 수 없다.Therefore, unless the surface tension of the cellulose-based film is lowered and the plasticizer is not removed, the vehicle and office automation equipment cannot be applied to the large liquid crystal display device.
본 발명의 목적은 편광 필름의 치수 안정성, 외관 특성, 고온, 다습 분위기하에서 신뢰성 및 대형화에 적합한 편광 필름의 제조 방법을 제공하는데 있다.An object of the present invention is to provide a method for producing a polarizing film suitable for dimensional stability, appearance characteristics, reliability and enlargement under a high temperature and high humidity atmosphere of the polarizing film.
이에 본 발명에서는 편광 필름의 보호층으로 사용된 셀룰로오즈계 필름에 코로나 처리하여 표면 장력을 낮추어 접착제가 고루 분포되도록 하고, 또 수중에서 초음파 처리하여 가소제를 치환시킴으로써 가소제의 휘발로 인한 편광필름의 비틀림 현상을 방지하였다.Accordingly, in the present invention, the cellulose-based film used as the protective layer of the polarizing film is corona treated to lower the surface tension so that the adhesive is evenly distributed, and the ultrasonic treatment is performed in water to displace the plasticizer, thereby torsional phenomenon of the polarizing film due to volatilization of the plasticizer. Was prevented.
본 발명을 좀더 구체적으로 설명하면 다음과 같다.The present invention will be described in more detail as follows.
셀룰로오즈계 필름의 한면 또는 양면에 코로나 처리하고 수중에서 10~30초간 초음파 처리하여 건조된 셀룰로오즈계 필름을 접착제를 사용하여 폴리비닐알콜계 필름에 접착시킨 편광필름의 제조 방법에 관한 것이다.The present invention relates to a method for producing a polarizing film in which a cellulose-based film dried by corona treatment on one or both sides of a cellulose-based film and ultrasonically treated in water for 10-30 seconds is adhered to a polyvinyl alcohol-based film using an adhesive.
일반적으로 사용되는 셀룰로오즈계 필름의 표면 장력을 낮추는 화학적인 방법으로는 알카리 처리 방법이 있으나, 이 경우 약품이 필름 표면에 직접 접촉되어야 하기 때문에 이를 제거하는 과정이 필요하며, 얼룩이 남는 문제점이 있다.As a chemical method for lowering the surface tension of a cellulose-based film that is generally used, there is an alkali treatment method, but in this case, a process of removing the chemical agent is required because it is in direct contact with the surface of the film, and there is a problem that stains remain.
따라서, 본 발명에서는 비접촉 방법인 코로나 처리를 함으로써 필름의 얼룩 및 공정 단순화, 제조 설비의 청결도를 유지할 수 있다.Therefore, in the present invention, by performing a corona treatment, which is a non-contact method, it is possible to maintain unevenness of the film, process simplification, and cleanliness of manufacturing facilities.
또한, 셀룰로오즈계 필름을 순수(純水) 중에서 10~30초간 초음파 처리를 함으로써 셀룰로오즈 내부의 가소제를 물로써 치환 및 건조 처리하여 제거하였다. 초음파 처리의 경우 10초 이하로 짧게 할 경우 폴리머 사이로 물의 침투가 어려워 가소제의 치환이 일부 이루어지지 않아 내구성에 문제점이 있으며, 30초 이상 처리할 경우 셀룰로오즈계 필름의 표면에 결점이 발생되어 광학 특성이 떨어진다.In addition, the cellulose-based film was sonicated in pure water for 10 to 30 seconds to remove the plasticizer in the cellulose by replacing with water and drying. If the ultrasonic treatment is shorter than 10 seconds, water is difficult to penetrate between the polymers, so that the plasticizer is not partially substituted, which causes problems in durability. If the treatment is performed for 30 seconds or longer, defects are generated on the surface of the cellulose-based film, resulting in optical characteristics. Falls.
상기한 바와 같이 코로나 처리 및 초음파 처리된 셀룰로오즈계 필름의 표면 장력은 수적(水滴)과의 접촉각이 15도 이하이며, 15도로 초과할 경우는 접착제의 응집군이 발생하여 편광 필름의 외관에 얼룩이 나타난다.As described above, the surface tension of the corona-treated and sonicated cellulose-based film has a contact angle with water droplets of 15 degrees or less, and when it exceeds 15 degrees, agglomeration groups of adhesives are generated and stains appear on the appearance of the polarizing film. .
본 발명에서 사용한 접착제는 폴리에스테르계 접착제, 폴리아크릴계 접착제, 에폭시계 접착제, 시아노아클릴레이트계 접착제 또는 폴리우레탄 계 접착제 중 선택된 것으로 셀룰로오즈계 필름과 PVA 필름과의 친화성을 갖는 접착제를 사용한다.The adhesive used in the present invention is selected from a polyester adhesive, a polyacrylic adhesive, an epoxy adhesive, a cyanoacrylate adhesive, or a polyurethane adhesive, and uses an adhesive having affinity between a cellulose film and a PVA film.
이하, 실시예 및 비교예에서 본 발명을 좀더 상세히 설명한다.Hereinafter, the present invention in more detail in Examples and Comparative Examples.
[실시예 1]Example 1
두께 80㎛의 시판되는 트리아세테이트 셀룰로오즈 필름(富山寫眞 필름사 제품)을 진공 중에서 코로나 처리하고 순수 중에서 20초간 초음파 처리한 후 폴리우레탄계 접착제로 양면에 접착한 후, 요오드가 흡착된 PVA 연신 필름에 접착하여 단체 투과도 43%, 편광도 92%인 편광 필름을 얻었다.A commercially available triacetate cellulose film (manufactured by Fukuyama Film Co., Ltd.) having a thickness of 80 µm was corona treated in vacuum and sonicated in pure water for 20 seconds, and then bonded to both sides with a polyurethane-based adhesive, followed by iodine-adsorbed PVA stretched film. Thus, a polarizing film having a single transmittance of 43% and a polarization degree of 92% was obtained.
[실시예 2]Example 2
두께 80㎛의 시판되는 트리아세테이트 셀룰로오즈 필름(富山寫眞 필름사 제품)을 진공 중에서 코로나 처리하고 순수 중에서 15초간 초음파 처리한 후 폴리아크릴계 접착제로 양면에 접착한 후, 이색성 염료가 흡착된 PVA 연신필름에 접착하여 단체투과도 39%, 편광도 90%인 편광필름을 얻었다.A commercially available triacetate cellulose film (manufactured by Fukuyama Film Co., Ltd.) having a thickness of 80 µm was corona treated in vacuum and sonicated for 15 seconds in pure water, and then adhered to both sides with a polyacrylic adhesive, followed by a PVA stretched film adsorbed with a dichroic dye. It adhere | attached on and obtained the polarizing film of 39% of single transmittance, and 90% of polarization degree.
[실시예 3]Example 3
실시예 1에 있어서, 초음파 처리 시간을 25초로 변경한 것 이외에는 동일하게 실시하여 단체투과도 43%, 편광도 95%인 편광필름을 얻었다.In Example 1, it carried out similarly except having changed the sonication time into 25 second, and obtained the polarizing film of 43% of single transmittance and 95% of polarization degree.
[실시예 4]Example 4
실시예 2에 있어서, 초음파 처리 시간을 10초로 변경한 것 이외에는 동일하게 실시하여 단체투과도 40%, 편광도 92%인 편광필름을 얻었다.In Example 2, except having changed the ultrasonication time into 10 second, it carried out similarly and obtained the polarizing film of 40% of single transmittance, and 92% of polarization degree.
[비교예 1]Comparative Example 1
실시예 1에서, 두께 80㎛의 시판되는 트리아세테이트 셀룰로오즈 필름(富山寫眞 필름사 제품)을 수산화나트륨 15% 수용액 중에서 처리한 것 이외에는 동일하게 실시하여 단체투과도 42%, 편광도 93%인 편광필름을 얻었다.In Example 1, a polarizing film having a unitary transmittance of 42% and a polarization of 93% was carried out in the same manner except that a commercially available triacetate cellulose film (manufactured by Toyama Co., Ltd.) having a thickness of 80 µm was treated in a 15% aqueous solution of sodium hydroxide. Got it.
[비교예 2]Comparative Example 2
실시예 2에서, 두께 80㎛의 시판되는 트리아세테이트 셀룰로오즈 필름(富山寫眞 필름사 제품)을 수산화나트륨 15% 수용액 중에서 처리하고 초음파 처리를 하지 않은 것 이외에는 동일하게 실시하여 단체 투과도 40%, 편광도 92%인 편광필름을 얻었다.In Example 2, a commercially available triacetate cellulose film (manufactured by Fukuyama Film Co., Ltd.) having a thickness of 80 µm was treated in 15% aqueous solution of sodium hydroxide and subjected to the same procedure except that it was not subjected to sonication, so that the transmittance was 40% and the degree of polarization 92. A polarizing film of% was obtained.
[비교예 3]Comparative Example 3
두께 80㎛의 시판되는 트리아세테이트 셀룰로오즈 필름(富山寫眞 필름사 제품)을 요오드를 흡착시킨 연신된 PVA 필름의 보호 필름으로 폴리아크릴계 접착제로 양면에 접착하여 단체투과도 40%, 편광도 92%인 편광필름을 얻었다.A commercially available triacetate cellulose film (manufactured by Tofuyama Film Co., Ltd.) having a thickness of 80 µm is a protective film of a stretched PVA film adsorbed with iodine, and is adhered to both sides with a polyacrylic adhesive to have a single transmittance of 40% and a polarization of 92%. Got.
[비교예 4][Comparative Example 4]
두께 80㎛의 시판되는 트리아세테이트 셀룰로오즈 필름(富山寫眞 필름사 제품)을 초음파 처리 중인 물속으로 20초간 통과시켜 요오드를 흡착시킨 연신된 PVA 필름의 보호필름으로 폴리우레탄계 접착제로 양면에 접착하여 단체투과도 41%, 편광도 94%인 편광필름을 얻었다.A commercially available triacetate cellulose film (manufactured by Fukuyama Film Co., Ltd.) having a thickness of 80 μm was passed through the water under ultrasonic treatment for 20 seconds to protect the stretched PVA film adsorbed with iodine. % And a polarizing film having a degree of polarization of 94% were obtained.
제조된 편광필름을 평가하여 표1에 기재하였다.The prepared polarizing film was evaluated and shown in Table 1.
(평가 방법)(Assessment Methods)
- 비틀림 (curl)-Curl
편광필름을 한변의 길이가 15cm인 정사각형으로 잘라 편편한 장소에 놓았을 때, 정사각형의 4꼭지점이 바닥으로부터 수직으로 떨어진 높이를 측정하여 mm 단위의 평균값으로 한다.When the polarizing film is cut into squares having a length of 15 cm on one side and placed in a flat place, the height of the four vertices of the square is measured perpendicularly from the floor to be an average value in mm.
- 단체 투과도-Unit permeability
편광필름 1면을 다중채널 광량측정기(일본 오츠카사 제품)로 광파장 380~780nm 사이의 투과율을 측정하여 평균값을 취한다.On one side of the polarizing film, the transmittance between the wavelengths of 380 nm and 780 nm is measured by using a multi-channel photometer (manufactured by Otsuka, Japan) and the average value is taken.
- 편광도-Polarization degree
편광필름 2매를 광축이 서로 평행 및 직교하도록 겹쳐서 다중채널 광량측정기로 광파장 380~780 nm사이의 투과율을 측정하여 평균값을 구하고 그 수치를 각각 평행투과율, 직교투과율이라고 정의하고 아래의 식에 의해 편광도를 구하였다.Two polarizing films are stacked so that the optical axes are parallel and orthogonal to each other, and the average value is obtained by measuring the transmittance between optical wavelengths of 380 to 780 nm using a multi-channel photometer. The values are defined as parallel transmittances and orthogonal transmittances, respectively. Was obtained.
-내습열성Moisture and Heat Resistance
60℃, 90%RH 분위기에서 편광 필름을 500시간 경과한 후 편광도를 측정한다.The polarization degree is measured after passing a polarizing film for 500 hours in 60 degreeC and 90% RH atmosphere.
- 외관 특성-Appearance characteristics
눈으로 보아 편광필름의 표면에 얼룩이 있는지 여부를 판별하고 비틀림의 크기가 5mm 이하인지를 판별하여 아래와 같이 4가지로 분류한다.Visually determine whether there is a stain on the surface of the polarizing film and determine whether the amount of torsion is less than 5mm and classify it into four types as follows.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950028036A KR0155039B1 (en) | 1995-08-31 | 1995-08-31 | Method for manufacturing polarized light film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950028036A KR0155039B1 (en) | 1995-08-31 | 1995-08-31 | Method for manufacturing polarized light film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970010098A KR970010098A (en) | 1997-03-27 |
| KR0155039B1 true KR0155039B1 (en) | 1998-11-16 |
Family
ID=19425468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950028036A KR0155039B1 (en) | 1995-08-31 | 1995-08-31 | Method for manufacturing polarized light film |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0155039B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006119203A (en) * | 2004-10-19 | 2006-05-11 | Nitto Denko Corp | Polarizing plate and method for manufacturing polarizing plate, and liquid crystal panel using such polarizing plate, liquid crystal television and liquid crystal display |
-
1995
- 1995-08-31 KR KR1019950028036A patent/KR0155039B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR970010098A (en) | 1997-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100767542B1 (en) | Liquid Crystal Display | |
| KR101900530B1 (en) | Polarizing plate and liquid crystal display apparatus comprising the same | |
| JP5372215B2 (en) | Polarizing plate and liquid crystal display device using the same | |
| JP4355317B2 (en) | Polarizing film, polarizing plate, and liquid crystal display device | |
| JPH0223304A (en) | Visible polarizing film | |
| US20060187548A1 (en) | Polarizing layer with adherent protective layer | |
| JP2003270442A (en) | Polarizing plate and liquid crystal display device using the same | |
| CN115394189A (en) | Image display device with fingerprint verification sensor | |
| JP2002090546A (en) | Polarizing plate and method for manufacturing the same | |
| KR100958287B1 (en) | Polarizer having excellent durability, polarizing plate and method for producing thereof | |
| CN105278023A (en) | Polarizing plate, liquid crystal display comprising the same and method for preparing polarizing plate | |
| TW202225747A (en) | Polarizing plate subjected to curved surface machining and method for manufacturing same | |
| JP7461758B2 (en) | Method for restoring optical properties of polarizing plates deteriorated in high temperature environments | |
| JPH11337730A (en) | Polarizing plate | |
| KR0155039B1 (en) | Method for manufacturing polarized light film | |
| TW200300511A (en) | Polarizing plate, production method thereof and liquid crystal display using the same | |
| CN113189692A (en) | Method for manufacturing polarizing plate | |
| JPH07198939A (en) | Production of polarizing film | |
| JP3520347B2 (en) | Release film for polarizing plate | |
| JP2001281452A (en) | Optical film, polarizing plate and liquid crystal display device | |
| JP3211590B2 (en) | Polarizer | |
| JP2001083329A (en) | Production of polarizing film | |
| JP3602555B2 (en) | Liquid crystal display | |
| JP3327410B2 (en) | Polarizing plate and liquid crystal display | |
| JP3878693B2 (en) | Polarizing plate and liquid crystal display device using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20120713 Year of fee payment: 15 |
|
| LAPS | Lapse due to unpaid annual fee |