KR19990015101A - Manufacturing method of diffuse reflection sheet - Google Patents
Manufacturing method of diffuse reflection sheet Download PDFInfo
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- KR19990015101A KR19990015101A KR1019970037001A KR19970037001A KR19990015101A KR 19990015101 A KR19990015101 A KR 19990015101A KR 1019970037001 A KR1019970037001 A KR 1019970037001A KR 19970037001 A KR19970037001 A KR 19970037001A KR 19990015101 A KR19990015101 A KR 19990015101A
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- South Korea
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- diffuse reflection
- reflection sheet
- particles
- acrylic urethane
- silica particles
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000008199 coating composition Substances 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 239000012948 isocyanate Substances 0.000 claims description 2
- 150000002513 isocyanates Chemical class 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 229920005906 polyester polyol Polymers 0.000 claims description 2
- 238000003848 UV Light-Curing Methods 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 11
- 239000011347 resin Substances 0.000 abstract description 11
- 229920005989 resin Polymers 0.000 abstract description 11
- 239000011248 coating agent Substances 0.000 abstract description 9
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000000704 physical effect Effects 0.000 abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 230000004313 glare Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000003999 initiator Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133502—Antiglare, refractive index matching layers
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
- G02B5/3091—Birefringent or phase retarding elements for use in the UV
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Laminated Bodies (AREA)
Abstract
본 발명은 액정표시장치에 사용되는 것으로 외부로부터 반사되는 빛에 의한 눈부심 방지를 위한 난반사 효과가 특히 우수하고 내스크랫치성, 콘트래스트 등의 물성이 전반적으로 우수한 난반사 시트를 제공하는 것을 그 목적으로 한 것이다.An object of the present invention is to provide a diffuse reflection sheet, which is used in a liquid crystal display device, which has particularly excellent diffuse reflection effect for preventing glare caused by light reflected from the outside and excellent physical properties such as scratch resistance and contrast. I did it.
본 발명은 상기와 같은 목적을 달성하기 위한 일 방법으로 자외선 경화형 아크릴 우레탄계 수지와 실리카 입자 및 용제를 함유한 코팅 조성물을 기재시트위에 코팅하여 건조후 자외선 경화에 의해 제조되는 공지의 난반사시트 제조시, 사용되는 실리카 입자는 밀링처리된 입자로서 평균입자크기가 400㎚-10㎛범위에 있고 표면에 드러나는 입자의 평균개수를 특정한 범위로 조절하여 사용하는 것을 특징으로 한 난반사 시트 제조방법을 제공하는데, 이와 같이 제조된 난반사 시트는 액정표시 장치 등에 사용되는 경우 우수한 물성을 나타낸다.The present invention is a method for achieving the above object by coating a coating composition containing an ultraviolet curable acrylic urethane-based resin, silica particles and a solvent on a base sheet to produce a known diffuse reflection sheet manufactured by ultraviolet curing after drying, The silica particles used are milled particles, which have an average particle size in the range of 400 nm-10 μm, and provide a method for producing a diffuse reflection sheet, characterized in that the average number of particles exposed on the surface is adjusted to a specific range. The diffuse reflection sheet manufactured as described above exhibits excellent physical properties when used in a liquid crystal display.
Description
본 발명은 액정표시장치에서 사용되는 것으로 외부로부터 반사되는 빛에 의한 눈부심 방지를 위한 난반사효과가 특7히 우수하고 내스크랫치성, 콘트래스트등의 물성이 전반적으로 우수한 난반사 시트의 제조방법에 관한 것이다.The present invention is to be used in the liquid crystal display device in the manufacturing method of the diffuse reflection sheet is particularly excellent in the anti-reflective effect for preventing glare by light reflected from the outside and excellent overall properties such as scratch resistance, contrast, etc. It is about.
기존의 눈부심방지(방현) 가공물로서는 표면에 요철이 있는 롤을 연속적으로 필름에 눌러줌으로써 필름에 요철을 부여하여 난반사효과를 내는 매트상 가공물(1), 수지의 상용성이나 결정화도의 차이를 이용한 확산형 가공물(2) 및 무기화합물의 박층 코팅을 한 가공물(3) 등이 알려져 있다.Existing anti-glare (anti-glare) workpiece is a mat-like workpiece (1) which gives irregular reflection to the film by applying unevenness to the film by continuously pressing a roll having irregularities on the surface, and diffusion using a difference in compatibility or crystallinity of the resin. Molded workpieces 2 and workpieces 3 having a thin layer coating of inorganic compounds are known.
이러한 가공물 중에서 (1)은 제조공정이 복잡하고 장시간을 요하여 제조단가가 높고, 또한 사용하는 금형의 내구성이나 금형수지를 분리할 때의 난점이 있으며, (2)는 가공물 자체의 내구성에 문제가 있고, (3)의 가공물은 기재 표면에 박층의 단층 또는 다층의 코팅층을 광선의 파장 레벨(Level)에 맞추어 형성한 것으로, 사용한 기재가 제한되어 제조공정이 복잡하고 장치가 복잡해지는 단점이 있다.Among these workpieces, (1) has a complicated manufacturing process and requires a long time, resulting in high manufacturing cost, and difficulty in separating the durability or mold resin of the mold used, and (2) has problems in durability of the workpiece itself. The workpiece of (3) is formed by forming a single layer or a multilayer coating layer on the surface of the substrate in accordance with the wavelength level of the light beam. The substrate used is limited, and thus, the manufacturing process is complicated and the apparatus is complicated.
본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로서, 제조공정이 단순하고 양산화가 가능하며 성능면에서도 우수한 난반사 효과를 가진 시트를 제조하는 방법을 제공하는 것을 그 목적으로 한 것이다.The present invention has been made to solve the above problems, it is an object of the present invention to provide a method for producing a sheet having a simple diffuse reflection effect in terms of performance and the production process is simple and mass production.
본 발명은 상기 목적을 달성하기 위하여 자외선 경화형 아크릴 우레탄계 수지와 실리카 입자 및 용제를 함유한 코팅 조성물을 기재 시트위에 코팅하여 건조 후 자외선 경화방식으로 제조하는 공지의 난반사 시트 제조공정에서 실리카 입자로서 입자의 평균크기가 400㎚∼10㎛인 것을 사용하고 표면에 드러난 입자의 평균개수가 103-108개/㎠의 범위에 있도록 사용하는 것을 특징으로 한 난반사 시트의 제조법을 제공한다.In order to achieve the above object, the present invention provides a coating composition containing an ultraviolet curable acrylic urethane-based resin, silica particles, and a solvent on a base sheet to dry the particles as silica particles in a known diffuse reflection sheet manufacturing process. Provided is a method for producing a diffuse reflection sheet, which uses an average size of 400 nm to 10 μm and uses the particles in the range of 10 3 -10 8 / cm 2.
이하에서 본 발명을 구체적으로 설명한다.Hereinafter, the present invention will be described in detail.
본 발명에 있어서 사용된 자외선 경화형 아크릴 우레탄계 수지는 일반적으로 폴리에스테르 폴리올에 이소시아네이트 모노마를 반응시켜 얻어지는 것이며, 분자 골격중에 우레탄 결합을 가지는 동시에 분자내의 임의위치(가장 좋기로는 분자말단)에 아크릴레이트(메타크릴레이트) 또는 유도된 아크릴레이트(메타크릴레이트)를 가지는 것을 사용하는 것이 좋다. 또한, 아크릴우레탄계 수지는 대부분 모노마와 분자량 5,000미만의 올리고머와의 혼합제를 사용하는데, 올리고머의 분자량이 5,000이상이 되면 고형분의 양을 일정하게 유지하더라도 코팅액의 점도가 올라가고 코팅 후 필름의 표면조도가 작아져 난반사효과가 줄어들고 이 때문에 입자의 함량을 늘리는 경우에는 필름의 선명도가 떨어지는 문제점이 발생한다. 그리고, 이러한 아크릴우레탄계 수지는 굴절율이 1.52 이상인 것을 사용하는데, 이는 굴절율이 대략 1.46 정도인 실리카와의 굴절율 차이를 크게하여 정반사되는 광을 줄이기 위함으로, 즉 코팅층의 표면에서 반사되는 빛은 표면에 드러난 입자에 의해 결정되지만 표면을 통과한 빛의 경우는 입자와 수지를 동시에 통과하게 되므로 이때 수지와 입자의 굴절율 차이를 이용해 빛의 난반사 효과를 극대화 할 수 있는 것이며, 이와같이 제조된 난반사 필름은 내부광의 투과율은 최대로 유지하면서 반사광은 줄일 수 있어 콘트래스트를 향상시킬 수 있는 것이다.UV curable acrylic urethane resins used in the present invention are generally obtained by reacting an isocyanate monoma with a polyester polyol, and having an urethane bond in the molecular backbone, and at the same time in the molecule (most preferably, the end of the molecule). Methacrylates) or derived acrylates (methacrylates). In addition, most of the acrylic urethane-based resin using a mixture of monomer and oligomer of less than 5,000 molecular weight, when the molecular weight of the oligomer is 5,000 or more, even if the amount of solid content is kept constant, the viscosity of the coating liquid rises and the surface roughness of the film after coating is small. The diffuse reflection effect is reduced, and thus, when the content of the particles is increased, the sharpness of the film is deteriorated. In addition, the acrylic urethane resin has a refractive index of 1.52 or more, which is to reduce the specularly reflected light by increasing the refractive index difference with silica having a refractive index of about 1.46, that is, the light reflected from the surface of the coating layer is exposed to the surface Although it is determined by the particles, the light passing through the surface passes through the particles and the resin at the same time, so that the diffuse reflection effect of the light can be maximized by using the difference between the refractive index of the resin and the particles. Can keep the maximum light while reducing the reflected light, thereby improving contrast.
본 발명에서 사용되는 실리카 입자는 이산화규소(SiO2)로 이루어져 있으며, 이와같은 실리카 입자의 밀링 후 입자의 크기는 400㎚-10㎛(보다 바람직하게는 1∼3㎛)정도가 바람직한데, 입자 크기가 400㎚미만인 경우에는 가시광선 영역의 파장을 산란 시키지 못하게 되고, 입자크기가 10㎛보다 클 경우에는 광투과율이 떨어지며 표면 상태가 거칠어지는 단점이 있다.The silica particles used in the present invention are composed of silicon dioxide (SiO 2 ), and the size of the particles after milling of such silica particles is preferably about 400 nm-10 μm (more preferably 1 to 3 μm). If the size is less than 400 nm, the wavelength of the visible light region is not scattered, and if the particle size is larger than 10 μm, the light transmittance is decreased and the surface state is rough.
한편, 본 발명에서는 코팅 후 표면에 드러나는 실리카 입자의 평균 개수는 103개/㎠∼108개/㎠ 범위에 있도록 하는 것을 또다른 특징부로 하는데, 입자의 평균개수가 103개/㎠ 미만 일때는 입자개수가 너무적어 정반사되는 빛의 양이 많아지기 때문에 화상의 콘트레스트가 떨어지고, 108개/㎠ 초과시에는 빛의 산란으로 인해 광투과율이 저하되며 입자의 돌출로 인해 표면경도가 떨어지는 문제점이 있다.On the other hand, the mean number of silica particles revealed on the surface after the coating in the present invention is 10 3/8 ㎠~10 number / ㎠ to another part characterized in that to the range, when the average number of particles 10 3 / under ㎠ Since the number of particles is too small, the amount of reflected light increases, so the contrast of the image falls, and when it exceeds 10 8 / cm 2, the light transmittance decreases due to light scattering, and the surface hardness decreases due to the protrusion of particles. have.
본 발명에서의 코팅 조성물은 아크릴우레탄 수지, 아크릴 수지, 실리카 입자를 용제와 함께 균일하게 혼합하여 만든다. 이때 사용되는 용제로서는 기재에 대하여 불활성인 것이 사용되며, 그 사용량은 고형분 농도가 20∼80중량% 정도가 되도록 사용하는 것이 좋다.The coating composition in the present invention is made by uniformly mixing an acrylic urethane resin, an acrylic resin, and silica particles with a solvent. The solvent used at this time is an inert thing with respect to a base material, It is good to use that the usage-amount so that solid content concentration may be about 20 to 80 weight%.
또한, 상기의 코팅 조성물에는 발명의 목적을 손상시키지 않는 한 각종의 첨가제, 예를들면, 안료, 염료, 대전방지제 등을 첨가할 수 있으며, 특히 자외선 경화를 위해 개시제가 사용되는데, 사용 가능한 개시제로는 아세톤페논류, 벤조페논류, 벤질류, 벤조인류 등이 있다.In addition, various additives such as pigments, dyes, antistatic agents, and the like can be added to the coating composition as long as the object of the invention is not impaired. In particular, an initiator is used for ultraviolet curing, Acetone phenones, benzophenones, benzyl, benzoin, etc. are mentioned.
본 발명에 따라 조제된 코팅 조성물은 기재 시트위에 스프레이법, 그라비에법 등의 일반적인 코팅방법에 의해 통상 두께가 3-10㎛정도로 코팅되며 가열건조 후 자외선을 조사하여 경화시킨다.The coating composition prepared according to the present invention is usually coated in a thickness of about 3-10㎛ by a general coating method such as spray method, gravure method on the substrate sheet and cured by irradiation with ultraviolet rays after heat drying.
기재 시트로서는 통상 TAC(TriAcetate Cellulose)이 사용되며, 그외에 투명한 폴리에스테르 수지, 폴리카보네이트 수지, 폴리아크릴 수지, 염화비닐 수지 등의 플라스틱 시트가 사용될 수 있다.TAC (TriAcetate Cellulose) is usually used as the base sheet, and other plastic sheets such as transparent polyester resins, polycarbonate resins, polyacrylic resins, and vinyl chloride resins may be used.
이하에서 실시예 및 비교예를 들어 본 발명을 좀 더 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
(실시예 1∼4, 비교예 1, 2)(Examples 1-4, Comparative Examples 1 and 2)
아래 표 1 에 기재된 바와 같이 구성된 코팅 조성물을 공지의 방법으로 난반사 시트를 제조하였는바, 이때 밀링처리하여 사용하였으며, 실시예1∼실시예4 에서는 코팅 후 표면에 드러나는 입자의 개수가 103개/㎠∼108개/㎠ 범위가 되도록 입자량을 조절하여 코팅하였으며, 비교예 1,2에서는 표면에 드러나는 입자의 개수가 103개/㎠미만, 또는 109개/㎠ 초과되도록 하였다. 이때 난반사 시트는 평균 코팅 두께가 5㎛ 되도록 하였으며, 물성을 조사하여 표 1 에 나타내었다.The coating composition configured as described in Table 1 below was prepared by a known method for the diffuse reflection sheet, which was used by milling, in Examples 1 to 4, the number of particles exposed on the surface after coating is 10 3 / Particles were adjusted to be coated so as to be in the range of cm 2 to 10 8 / cm 2, and in Comparative Examples 1 and 2, the number of particles exposed on the surface was less than 10 3 pieces / cm 2 or more than 10 9 pieces / cm 2. At this time, the diffuse reflection sheet was to have an average coating thickness of 5㎛, it is shown in Table 1 by examining the physical properties.
(실시예 5∼7, 비교예 3, 4)(Examples 5-7, Comparative Examples 3 and 4)
하기 표 2 는 조성물 중 아크릴 우레탄계 수지의 굴절율에 따른 반사광의 변화를 나타낸 것으로, 실시예5∼실시예7 에서는 굴절율이 1.52 이상인 수지를 사용하였으며, 비교예3, 비교예4에서는 굴절율이 각각 1.48, 1.50인 수지를 사용하였다. 코팅액의 조성 및 코팅방식은 실시예 1과 동일하게 하여 평균 코팅두께 5㎛의 난반사 시트를 얻었으며, 물성을 조사하여 표 2 에 나타내었다.Table 2 shows the change in the reflected light according to the refractive index of the acrylic urethane resin in the composition. In Examples 5 to 7, resins having a refractive index of 1.52 or more were used. In Comparative Examples 3 and 4, the refractive index was 1.48, respectively. A resin of 1.50 was used. The composition and the coating method of the coating solution were the same as in Example 1 to obtain a diffuse reflection sheet having an average coating thickness of 5㎛, it is shown in Table 2 by examining the physical properties.
상기 실시예 및 비교예에서도 확인 되듯이 본 발명에 따라 얻어지는 난반사 시트는 실리카가 함유된 경화피막으로 인해 양호한 방현성을 가지며, 자외선 경화피막의 경도가 높기 때문에 내스크래치성이 우수한 특성을 나타내는 한편 콘트래스트가 우수한 성능을 진닌다.As can be seen from the above examples and comparative examples, the diffused reflection sheet according to the present invention has good anti-glare property due to the cured film containing silica, and exhibits excellent scratch resistance due to the high hardness of the UV cured film. Trast has excellent performance.
Claims (4)
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| KR1019970037001A KR100469308B1 (en) | 1997-08-01 | 1997-08-01 | Manufacturing method of sheet for diffused reflection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100824325B1 (en) * | 2006-05-26 | 2008-04-22 | 요업기술원 | Anti-glare coating comprising silica fine hollow spheres, and anti-glare film produced therefrom |
| KR100959683B1 (en) * | 2001-12-28 | 2010-05-26 | 엘지디스플레이 주식회사 | Reflective Liquid Crystal Display and Manufacturing Method Thereof |
| US8040456B2 (en) | 2003-01-15 | 2011-10-18 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and manufacturing method of liquid crystal display device |
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| JPS54158078A (en) * | 1978-06-05 | 1979-12-13 | Osaka Gas Co Ltd | Waste melting furnace |
| JPH05341109A (en) * | 1992-06-04 | 1993-12-24 | Toyo Alum Kk | Light reflecting plate |
| JPH0727905A (en) * | 1993-07-14 | 1995-01-31 | Keiwa Shoko Kk | Reflecting sheet material |
| JP3092035B2 (en) * | 1993-10-13 | 2000-09-25 | 松下電器産業株式会社 | Liquid crystal display device and method of manufacturing reflector thereof |
| JPH09113707A (en) * | 1995-10-19 | 1997-05-02 | Dainippon Printing Co Ltd | Light reflector and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100959683B1 (en) * | 2001-12-28 | 2010-05-26 | 엘지디스플레이 주식회사 | Reflective Liquid Crystal Display and Manufacturing Method Thereof |
| US8040456B2 (en) | 2003-01-15 | 2011-10-18 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and manufacturing method of liquid crystal display device |
| US8218105B2 (en) | 2003-01-15 | 2012-07-10 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and manufacturing method of liquid crystal display device |
| US8634041B2 (en) | 2003-01-15 | 2014-01-21 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and manufacturing method of liquid crystal display device |
| KR100824325B1 (en) * | 2006-05-26 | 2008-04-22 | 요업기술원 | Anti-glare coating comprising silica fine hollow spheres, and anti-glare film produced therefrom |
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