KR100479618B1 - The preparation method of plastic optical film for the use of display - Google Patents
The preparation method of plastic optical film for the use of display Download PDFInfo
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- KR100479618B1 KR100479618B1 KR10-2002-0020899A KR20020020899A KR100479618B1 KR 100479618 B1 KR100479618 B1 KR 100479618B1 KR 20020020899 A KR20020020899 A KR 20020020899A KR 100479618 B1 KR100479618 B1 KR 100479618B1
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- film
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- optical film
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- 239000012788 optical film Substances 0.000 title claims abstract description 12
- 239000004033 plastic Substances 0.000 title claims abstract description 9
- 229920003023 plastic Polymers 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title description 2
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 239000010408 film Substances 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000002834 transmittance Methods 0.000 claims abstract description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000004695 Polyether sulfone Substances 0.000 claims description 8
- 229920006393 polyether sulfone Polymers 0.000 claims description 8
- 238000009966 trimming Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 12
- 239000000155 melt Substances 0.000 abstract description 10
- 239000002985 plastic film Substances 0.000 description 8
- 229920006255 plastic film Polymers 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 238000000137 annealing Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 5
- 238000000807 solvent casting Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 229920001230 polyarylate Polymers 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 1
- 229920012266 Poly(ether sulfone) PES Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
- B29D11/00788—Producing optical films
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
본 발명은 용융압출법을 이용한, 디스플레이용 플라스틱 광학 필름의 제조방법에 관한 것이다.The present invention relates to a method for producing a plastic optical film for display using a melt extrusion method.
본 발명의 제조방법은 용융압출기를 통과한 필름을 3개의 연속된 냉각롤을 통하여 냉각 및 어닐링 시키는 것을 특징으로 한다.The production method of the present invention is characterized in that the film passing through the melt extruder is cooled and annealed through three consecutive cooling rolls.
본 발명의 제조방법에 의해 제조된 필름은 광학적 이방성, 빛 투과율, 두께 편차 등 광학 특성이 우수하여 액정 디스플레이 또는 터치패널 등에 이용할 수 있다.The film produced by the production method of the present invention is excellent in optical properties such as optical anisotropy, light transmittance, thickness variation, and can be used for a liquid crystal display or a touch panel.
Description
본 발명은 디스플레이용 플라스틱 광학 필름의 제조방법에 관한 것이다.The present invention relates to a method for producing a plastic optical film for display.
디스플레이는 전자계산기, 전자시계, 자동차 내비게이션, 사무자동화 기기의 조작화면, 휴대전화, 노트북 컴퓨터 및 휴대 정보통신 단말기 등에 널리 사용되고 있다.Displays are widely used in electronic calculators, electronic clocks, car navigation systems, operation screens of office automation equipment, mobile phones, notebook computers and portable information communication terminals.
종래에는 디스플레이의 소재로 유리기판을 사용하였다. 그러나 유리의 특성상 내충격성이 부족하여 충격에 쉽게 파손되고, 박형화하는데 한계가 있으며, 단위 부피당 무게가 커서 경량화하는데 한계가 있다. 이러한 문제를 해결하기 위하여 내충격성이 우수하고 경량화가 가능한 플라스틱 필름이 유리를 대체하여 사용되고 있다.In the past, a glass substrate was used as a material of a display. However, due to the characteristics of the glass, the impact resistance is insufficient, it is easily broken by the impact, there is a limit to thinning, and the weight per unit volume is limited to light weight. In order to solve this problem, a plastic film which is excellent in impact resistance and capable of being lightweight is used to replace glass.
이러한 용도의 플라스틱 필름의 기본재료로는 광학 특성이 우수한 폴리카보네이트(polycarbonate, PC), 폴리이미드(polyimide, PI), 폴리에테르술폰(polyethersulfone, PES), 폴리아릴레이트(polyarylate, PAR), 폴리에틸렌나프탈레이트(polyethylene naphthalate, PEN), 폴리에틸렌테레프탈레이트(polyethylene terephthalate, PET) 등의 열가소성 수지와 에폭시, 불포화 폴리에스터 등의 열경화성 수지를 사용할 수 있다.The basic material of the plastic film for such use is polycarbonate (PC), polyimide (PI), polyethersulfone (PES), polyarylate (PAR), polyethylene or Thermoplastic resins, such as thermoplastic resins, such as phthalate (polyethylene naphthalate (PEN) and polyethylene terephthalate (PET), and epoxy, an unsaturated polyester, can be used.
열가소성 수지를 사용하여 디스플레이용 플라스틱 필름을 제조하는 방법으로는 용매 캐스팅법, 블로우 성형, 압출 연신법 등이 있으며, 현재는 주로 용매캐스팅법을 사용하고 있다.As a method of manufacturing a display plastic film using a thermoplastic resin, there are a solvent casting method, a blow molding, an extrusion stretching method, and the like, and at present, a solvent casting method is mainly used.
용매캐스팅법은 수지를 용매에 녹여 용액으로 제조한 후, 캐스터에 적용하고 용매를 증발시켜 필름이나 쉬트를 만드는 배치공정식 방법이다. 이러한 방법은 다량의 용매를 사용하는 것이 필수적이므로 이들 용매를 증발시켜야 하는 공정상의 번거로움이 있고, 또한 증발시킨 용매에 의한 작업장의 공기 오염 등 환경 문제도 심각하다. 또한 배치공정에 의한 방법이므로 생산성이 높지 않아 생산단가가 매우 높은 단점이 있다.The solvent casting method is a batch process method in which a resin is dissolved in a solvent to prepare a solution, then applied to a caster and the solvent is evaporated to form a film or sheet. Since this method is essential to use a large amount of solvents, there is a process trouble to evaporate these solvents, and environmental problems such as air pollution in the workplace by the evaporated solvents are also serious. In addition, there is a disadvantage that the production cost is very high because the productivity is not high because of the batch process.
디스플레이용 플라스틱 필름을 제조하는 다른 방법으로 용융압출법이 있다. 용융압출법은 압출기에 T-다이, 코트행거다이 등을 장착하여 냉각롤을 이용하여 용융물을 냉각 시키면서 쉬트상으로 연속적으로 생산하는 방법이다. 이 방법은 용매캐스팅법의 단점으로 지적되는 용매를 제거하기 위한 공정상의 번거로움이나 용매에 의한 환경오염 문제가 없으며, 연속공정으로 제조할 수 있어 생산단가를 획기적으로 낮출 수 있다.Another method for producing plastic films for displays is the melt extrusion method. Melt extrusion method is a method of producing a sheet continuously by cooling the melt using a cooling roll by mounting a T-die, a coat hanger die, etc. in the extruder. This method has no problem of process pollution or environmental pollution caused by solvent to remove the solvent, which is pointed out as a disadvantage of the solvent casting method, and can be manufactured in a continuous process, which can significantly lower the production cost.
그러나 T-다이, 코트행거다이 등에서 압출하여 냉각롤에서 냉각되어 고화된 필름은 광학적 등방성 또는 균질성을 확보하기 어렵다. 그 이유는 다이 내부에서 수지 용융물에 전단응력이 작용하고 두께를 균일하게 조절하는 다이 립에서는 용융수지가 연신되며 흐름 방향으로 분자배향이 일어나기 때문이다. 상기의 필름 혹은 쉬트의 광학적 등방성을 얻기 위하여 롤-투-롤(roll-to-roll) 방법에 의해 어닐링 등의 열처리를 하여도 와인더에 의해 달리는 방향으로 장력이 작용하기 때문에 장력의 조정이 어려워 복굴절율의 조절이 매우 곤란하다.However, the film solidified by being extruded from a T-die or a coat hanger die and cooled in a cooling roll is difficult to secure optical isotropy or homogeneity. This is because the shear stress acts on the melt of the resin inside the die, and the molten resin is elongated and the molecular orientation occurs in the flow direction in the die lip uniformly controlling the thickness. In order to obtain the optical isotropy of the film or sheet, even though heat treatment such as annealing is performed by a roll-to-roll method, tension is difficult to adjust because the tension acts in the running direction by the winder. It is very difficult to control birefringence.
또한 용융압출의 특성상 수지가 고온에 노출되는 이력이 길어 노화, 황변 등의 문제점이 발생한다.In addition, due to the characteristics of melt extrusion, the resin has a long history of exposure to high temperature, causing problems such as aging and yellowing.
본 발명에서는 새로운 용융압출법을 이용한, 디스플레이용 필름으로서의 광학적 특성을 충족하는 플라스틱 광학 필름을 제조하기 위한 방법을 제공하고자 한다.The present invention is to provide a method for producing a plastic optical film that satisfies the optical properties as a display film using a new melt extrusion method.
본 발명은 용융압출법을 이용한, 디스플레이용 플라스틱 광학 필름의 제조방법을 제공한다.The present invention provides a method for producing a plastic optical film for display using a melt extrusion method.
본 발명의 제조방법은 1) 수지를 건조하는 단계, 2) 건조된 수지를 압출기로 이송하여 용융시키는 단계, 3) 수지 용융물을 T-다이로 압출시키는 단계, 4) 압출된 필름을 냉각롤을 통하여 냉각 및 어닐링시키는 단계, 및 5) 고화된 필름을 트리밍하는 단계로 이루어진다.The manufacturing method of the present invention comprises the steps of 1) drying the resin, 2) transferring the dried resin to an extruder to melt, 3) extruding the resin melt into a T-die, 4) cooling the extruded film to a cooling roll. Cooling and annealing through, and 5) trimming the solidified film.
본 발명의 제조방법은 상기 4)단계에서 압출된 필름을 냉각시킬때, 3개의 연속된 냉각롤을 통하여 냉각 및 어닐링시킴을 특징으로 한다.The production method of the present invention is characterized by cooling and annealing through three consecutive cooling rolls when cooling the extruded film in step 4).
또한 본 발명의 제조방법은, 상기 4)단계에서 3개의 연속된 냉각롤을 이용하여 냉각 및 어닐링 시킬때, 제 1 냉각롤의 온도는 130~200℃, 바람직하게는 155~185℃, 제 2 냉각롤의 온도는 130~200℃, 제 3 냉각롤의 온도는 180~240℃, 바람직하게는 190~220℃로 함을 특징으로 한다.In addition, the manufacturing method of the present invention, when the cooling and annealing using three consecutive cooling rolls in the step 4), the temperature of the first cooling roll is 130 ~ 200 ℃, preferably 155 ~ 185 ℃, the second The temperature of the cooling roll is 130 ~ 200 ℃, the temperature of the third cooling roll is characterized in that 180 ~ 240 ℃, preferably 190 ~ 220 ℃.
본 발명의 제조방법은 3개의 냉각롤이 서로 균일하게 밀어주는 압력에 의해 종래의 냉각롤 2개만 가지고 냉각시킬 때보다 필름의 표면을 더욱 균일하게 하여, 두께 편차가 1% 이하인 플라스틱 필름을 얻을 수 있다.The manufacturing method of the present invention makes the surface of the film more uniform than when cooling with only two conventional cooling rolls by the pressure of three cooling rolls uniformly pushing each other, thereby obtaining a plastic film having a thickness variation of 1% or less. have.
이하, 본 발명의 제조방법에 대하여 상세히 설명한다.Hereinafter, the manufacturing method of the present invention will be described in detail.
도 1은 본 발명의 용융압출법에 의한 플라스틱 필름의 제조공정을 나타낸 도이다.1 is a view showing a manufacturing process of a plastic film by the melt extrusion method of the present invention.
원료이송장치(1)에 의해 수지를 원료 패킹백(2)으로 이송한 다음, 건조기(3)로 옮겨 170℃에서 7시간 건조한다. 건조기(3)에서 수분, 미세부유 먼지, 휘발성 기체 등을 제거한 후, 수지를 압출기(4)에 투입한다. 압출기의 원료 투입구쪽 배럴의 온도는 150~170℃로 가열하고, 압출기 용융부의 온도는 370~420℃로 가열하여 수지를 용융시킨다. T-다이(5)를 통해 압출된 플라스틱 필름을 3개의 냉각롤(6)로 이송시켜 고화 및 아닐링 한다. T-다이의 온도는 370~420℃, 바람직하게는 380~410℃로 제어한다. 이때 T-다이의 온도가 너무 낮으면 냉각롤의 인발에 의해 연신배향이 일어나 복굴절이 커지게 되며, 온도가 너무 높으면 냉각롤 상에서 극히 미세한 냉각 주름이 발생하여 광학적 복굴절의 불균일성이 생긴게 된다.The resin is transferred to the raw material packing bag 2 by the raw material conveying apparatus 1, and then transferred to the dryer 3 and dried at 170 ° C. for 7 hours. After removing moisture, fine-floating dust, volatile gases, and the like from the dryer 3, the resin is introduced into the extruder 4. The temperature of the barrel of the raw material inlet side of the extruder is heated to 150 to 170 ° C, and the temperature of the extruder melt is heated to 370 to 420 ° C to melt the resin. The plastic film extruded through the T-die 5 is transferred to three cooling rolls 6 for solidification and annealing. The temperature of the T-die is controlled to 370 to 420 ° C, preferably 380 to 410 ° C. At this time, if the temperature of the T-die is too low, the stretching orientation is caused by the drawing of the cooling rolls, and the birefringence is increased. If the temperature is too high, extremely fine cooling wrinkles are generated on the cooling rolls, resulting in uneven optical birefringence.
제 1 냉각롤의 온도는 바람직하게는 155~185℃의 범위에서 균일하게 제어된다. 냉각롤의 온도가 너무 높으면 필름이 롤상으로 밀착하여 외관 불량의 원인이 되며, 너무 낮으면 미세 냉각 주름이 생긴다. 제 2 냉각롤의 온도는 130~200℃의 범위에서 행하고, 바람직하게는 130~170℃로 균일하게 제어한다. 제 3 냉각롤의 온도는 180~240℃, 바람직하게는 190~220℃로 균일하게 제어하여 어닐링이 일어나도록 한다. T-다이에서 나오는 필름을 롤에 느슨하게 공급하여 제 1 냉각롤과 제 2 냉각롤에서 필름이 연신되지 않도록 하는 것이 중요하다.Preferably the temperature of a 1st cooling roll is controlled uniformly in the range of 155-185 degreeC. If the temperature of the cooling roll is too high, the film is in close contact with the roll, causing appearance defects, and if it is too low, fine cooling wrinkles occur. The temperature of the 2nd cooling roll is performed in the range of 130-200 degreeC, Preferably it is controlled uniformly to 130-170 degreeC. The temperature of the third cooling roll is controlled uniformly to 180 ~ 240 ℃, preferably 190 ~ 220 ℃ to cause annealing. It is important to loosely feed the film from the T-die onto the roll so that the film is not stretched on the first and second chill rolls.
제조된 필름을 마스킹롤(7)로 이송하여 보호필름을 부착하고, 트리밍 장치(8)로 가장자리를 트리밍한 후, 와인더(9)로 감아 최종 제품을 생산한다.The produced film is transferred to a masking roll 7 to attach a protective film, and trimming the edges with a trimming device 8, and then wound with a winder 9 to produce a final product.
본 발명의 제조방법에 사용되는 플라스틱 수지는 폴리카보네이트, 폴리에테르술폰, 폴리아릴레이트등 이며, 특히 폴리에테르술폰이 바람직하다.Plastic resin used for the manufacturing method of this invention is polycarbonate, polyether sulfone, polyarylate, etc., Especially polyether sulfone is preferable.
본 발명의 용융압출법에 의해 제조된 필름은 디스플레이용 광학 필름으로서의 광학적 성질, 즉 빛 투과율, 광학적 이방성을 모두 만족하며, 물리적 성질인 표면 평활도, 기계적 강도, 두께 편차 등을 모두 만족한다. 특히, 고내열성 폴리에테르술폰을 원료로 하여 본 발명의 제조방법에 따라 제조된 필름은 빛 투과율 88~91%, 두께 100~500㎛, 광학적 이방성 10㎚이하, 두께 편차 1%이하의 우수한 광학적 및 물리적 특성을 나타낸다.The film produced by the melt extrusion method of the present invention satisfies both optical properties, that is, light transmittance and optical anisotropy, as the optical film for display, and satisfies all surface smoothness, mechanical strength, thickness variation, and the like as physical properties. In particular, the film produced according to the production method of the present invention using a high heat-resistant polyether sulfone as a raw material has excellent optical transmittance of 88 ~ 91%, thickness 100 ~ 500㎛, optical anisotropy 10nm or less, thickness deviation 1% or less Physical properties.
본 발명의 제조방법에 의해 제조된 필름의 양면 또는 단면에 ITO(Indium tin oxide), PEDOT 등의 투명 전극을 증착하므로써 TN(Twisted nematic), STN(Super Twisted nematic), TFT(Thin film transistor) 등의 액정 디스플레이 또는 터치패널 등에 이용될 수 있다.TN (Twisted nematic), STN (Super Twisted nematic), TFT (Thin film transistor), etc. by depositing transparent electrodes such as ITO (Indium tin oxide), PEDOT, etc. It can be used for a liquid crystal display or a touch panel.
이하, 본 발명은 하기 실시예에 의해 더욱 구체적으로 설명하나, 본 발명이 이들 실시예로 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
실시예Example : 폴리에테르술폰 필름의 제조 : Preparation of Polyethersulfone Film
도 1에 나타낸 압출공정 및 하기 표 1에 기재한 압출공정 조건을 이용하여 디스플레이용 폴리에테르술폰 광학 필름을 제조하였다. 필름의 두께는 200㎛, 폭 1,450㎜ 이다.The polyethersulfone optical film for display was produced using the extrusion process shown in FIG. 1, and the extrusion process conditions shown in Table 1 below. The thickness of the film is 200 µm and the width 1,450 mm.
실험예Experimental Example : 물성 측정 Property measurement
상기 실시예에 의해 제조된 폴리에테르술폰 필름을 사용하여, 위상차 균일성, 빛 투과율, 표면 평활도 및 제반 물성을 측정 하였다.Using the polyether sulfone film prepared according to the above example, retardation uniformity, light transmittance, surface smoothness and physical properties were measured.
필름의 기계적 성질은 UTM(universal testing machine), 표면 평활도는 AFM(Atomic force microscope), 광학적 성질에서 위상차(retardation)는 PCT-2000 자동 복굴절율 측정기(독일 Instrument System), 빛 투과율은 UV/VIS 분광계(휴렛팩커드사의 8452A)를 사용하였다.The mechanical properties of the film are UTM (universal testing machine), the surface smoothness is AFM (Atomic force microscope), the optical retardation is PCT-2000 automatic birefringence meter (German Instrument System), and the light transmittance is UV / VIS spectrometer. (8452A of Hewlett-Packard Company) was used.
측정 결과는 표 2에 나타내었다.The measurement results are shown in Table 2.
표 2에서 보듯이, 본 발명에 의하여 제조된 폴리에테르술폰 필름은 빛 투과율 88~91%, 광학적 이방성 10㎚이하, 두께 편차 1%이하로 우수한 광학적 및 물리적 특성을 나타냄을 확인하였다.As shown in Table 2, it was confirmed that the polyether sulfone film prepared according to the present invention exhibits excellent optical and physical properties with light transmittance of 88 to 91%, optical anisotropy of 10 nm or less, and thickness variation of 1% or less.
본 발명의 제조방법에 의해 제조된 디스플레이용 플라스틱 광학 필름은 빛 투과율 및 표면 평활도 등 광학용 필름으로서의 광학적 및 물리적 성질이 우수하다.The plastic optical film for display manufactured by the manufacturing method of this invention is excellent in the optical and physical property as an optical film, such as light transmittance and surface smoothness.
또한 본 발명의 제조방법은 용매를 사용하지 않고 고온에서 수지를 직접 용융 및 압출하므로, 환경친화적이고, 연속식 공정이므로 생산성이 높아 생산단가를 낮추는 효과가 있다.In addition, the production method of the present invention directly melts and extrudes the resin at a high temperature without using a solvent, which is environmentally friendly and thus a continuous process, thereby increasing productivity and reducing production costs.
도 1은 본 발명의 용융압출법에 의한 플라스틱 필름의 제조공정을 나타낸 도이다.1 is a view showing a manufacturing process of a plastic film by the melt extrusion method of the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
1 : 원료이송장치 2 : 원료 패킹백1: Raw material feeder 2: Raw material packing bag
3 : 건조기 4 : 압출기3: dryer 4: extruder
5 : 다이 6 : 냉각롤5: die 6: cooling roll
7 : 마스킹롤 8 : 트리밍 장치7: masking roll 8: trimming device
9 : 와인더9: winder
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| KR100730415B1 (en) | 2006-12-20 | 2007-06-19 | 제일모직주식회사 | Device for manufacturing the optical film and method for manufacturing the same |
| KR101008539B1 (en) | 2008-10-24 | 2011-01-14 | 주식회사 에스폴리텍 | Multifilm manufacturing system of a display device |
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| KR20040046343A (en) * | 2002-11-27 | 2004-06-05 | (주)아이컴포넌트 | A manufacturing method of transparent film for display panel |
| KR20040046344A (en) * | 2002-11-27 | 2004-06-05 | (주)아이컴포넌트 | A manufacturing method of polyethersulfone film for display panel |
| KR100668683B1 (en) * | 2004-03-16 | 2007-01-12 | (주)아이컴포넌트 | A manufacturing method of transparent film having low thermal shrinkage properties for display panel |
| KR100824613B1 (en) * | 2006-12-08 | 2008-04-23 | 천효원 | Cooling system of extruded plastics |
| KR102051744B1 (en) * | 2018-04-06 | 2019-12-03 | 김순이 | Apparatus for manufacturing an envelope with removing a thickness variation of a plastic bag and a plastic bag manufactured by the apparatus |
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| JPH09155951A (en) * | 1995-12-01 | 1997-06-17 | Sekisui Chem Co Ltd | Manufacture of polysulphone resin film |
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| JPH07276471A (en) * | 1994-04-06 | 1995-10-24 | Teijin Chem Ltd | Manufacture of optical polycarbonate resin sheet |
| JPH08318538A (en) * | 1995-03-20 | 1996-12-03 | Teijin Ltd | Manufacture of optically isotropycal film of aromatic polyether sulfone |
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| KR100730415B1 (en) | 2006-12-20 | 2007-06-19 | 제일모직주식회사 | Device for manufacturing the optical film and method for manufacturing the same |
| KR101008539B1 (en) | 2008-10-24 | 2011-01-14 | 주식회사 에스폴리텍 | Multifilm manufacturing system of a display device |
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