본 발명은 홀로그래프(Holograph)용 필름의 제조방법에 관한 것이다.The present invention relates to a method for producing a film for holographic (Holograph).
입체영상(立體映像)을 나타내는 도형(圖形)을 홀로그램(Hologram)이라 하며, 홀로그램을 나타낼 수 있는 광기록(光記錄)매체(媒體)를 홀로그래프(Holograph)라 하는데, 이러한 홀로그래프는 라벨(Label), 스티커(Sticker)또는 스탬핑 호일 (Stamping foil)의 형태로 공급되며 홀로그램의 독특한 영상은 기존의 인쇄방식으로는 복제가 불가능하기 때문에 각종 위·변조 방지 수단으로 널리 이용되고 있다.A hologram is a figure representing a stereoscopic image, and an optical recording medium capable of representing a hologram is called a hologram. A hologram is a label (a hologram). It is supplied in the form of a label, a sticker, or a stamping foil, and a unique image of the hologram is widely used as a means of preventing forgery and alteration because it cannot be reproduced by a conventional printing method.
홀로그램의 입체영상은 빛의 위상(位相)정보를 홀로그래프에 기록함으로서 나타낼 수 있는 것이다.The three-dimensional image of the hologram can be represented by recording the phase information of light on the hologram.
평면의 홀로그래프에 입체영상을 기록할 수 있는 것은 홀로그래프에 깊이와 굴절률 분포가 다른 미세한 요철무늬를 형성시키고, 이 요철무늬에 의해 반사, 흡수, 투과 등의 성질을 갖는 빛의 상호작용으로 빛을 산란시키고, 산란되는 빛에 상대적 광로차(optical path difference)가 발생되게 하여 입체감을 느낄 수 있게 하는 것이다.The ability to record a stereoscopic image on a flat hologram forms a fine concavo-convex pattern with different depths and refractive index distribution on the hologram, and the light is generated by the interaction of light having properties such as reflection, absorption, and transmission. To scatter the light, and to cause a relative optical path difference (optical path difference) to the scattered light to be able to feel a three-dimensional feeling.
일반적으로 홀로그래프는 필름형태로 제작되는데 종래 홀로그래프용 필름은 폴리에스텔(polyethylene terephthalate : 이하 PET라 한다) 수지와 같은 합성수지필름상에 열가소성수지를 도포 하여 열가소성수지층을 형성시키고, 이 열가소성수지층에 엠보싱(embossing)방법으로 미세 요철무늬를 형성시키고, 그 위에 금속을 진공증착(vacuum coating)하여 제조된다. 이때 미세요철무늬는 평면상에 파인 홈(凹형)과 돌기(凸형)가 미세한 선형(線形)으로 나타나게 한다.In general, the holographic film is manufactured in the form of a film. In the conventional holographic film, a thermoplastic resin layer is formed by applying a thermoplastic resin on a synthetic resin film such as polyester terephthalate (hereinafter referred to as PET) resin to form a thermoplastic resin layer. It is produced by forming a fine concavo-convex pattern by embossing method, and vacuum coating the metal thereon. At this time, the fine concave-convex pattern causes the grooves and the projections to be formed on the plane to appear as a fine linear.
여기에 사용되는 열가소성수지로서는 셀룰로오스 아세테이트 부틸레이트 (cellulose acetate butylate), 셀룰로오스 아세테이트 에틸레이트, 우레탄수지 등이 있으며, 열가소성수지층을 형성시켜 주는 이유는 열가소성수지가 비교적 연질이고, 형태유지성이 좋아 엠보싱 방법으로 미세한요철무늬를 형성시켜주기가 용이하기 때문이다. 또한 금속진공증착을 하여주면 빛의 반사 및 산란이 잘 이루어지게 된다.Thermoplastic resins used herein include cellulose acetate butylate, cellulose acetate ethylate, urethane resins, etc., and the reason for forming the thermoplastic resin layer is that the thermoplastic resin is relatively soft and has good shape retention. This is because it is easy to form a fine concave-convex pattern. In addition, when the vacuum deposition of the metal will be well reflected and scattered light.
그러나 합성수지필름 표면에 형성되는 열가소성수지층은 경도, 내열성 및 내용제성 등이 낮아 외부충격등에 의해서 쉽게 손상되는 결함이 있으며, 이것이 손상되게되면 정확한 영상을 나타낼 수 없게 되는 문제가 따르게 된다.However, the thermoplastic resin layer formed on the surface of the synthetic resin film has low hardness, heat resistance, and solvent resistance, and thus is easily damaged by an external impact. If this is damaged, it is not possible to display an accurate image.
따라서 이 분야에서는 경도와 내용제성이 우수하면서 미세요철무늬도 용이하게 형성시켜줄 수 있는 소재로 구성되는 홀로그래프용 필름의 개발이 요망되는 실정에 있다.Therefore, in this field, there is a demand for the development of a holographic film composed of a material which is excellent in hardness and solvent resistance and can easily form fine rough patterns.
본 발명의 목적은 홀로그램을 나타내게 하는 미세요철무늬를 형성시켜주는 것이 용이하면서 경도와 내용제성이 우수한 홀로그래프용 필름을 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a holographic film having excellent hardness and solvent resistance while being easy to form an uneven pattern showing a hologram.
본 발명자들은 PET수지필름과 같은 합성수지필름 일면에 단파장광개시제와 장파장광개시제를 함께 함유하는 자외선경화수지층을 형성시키고, 먼저 단파장의 자외선을 조사하여 자외선수지층을 반경화상태로 만들어주고 이 수지층이 반 경화된 상태에서 엠보싱방법으로 여기에 미세요철무늬를 형성시킨 후 재차 장파장의 자외선을 조사하여 완전히 경화시킨 후 금속을 증착시켜주면 미세요철무늬의 형성도 용이하면서 내용제성과 표면경도가 우수한 홀로그래프용 필름을 얻을 수 있는 것을 확인하여 본 발명을 완성하게 되었다.The present inventors form an ultraviolet curable resin layer containing both a short wavelength photoinitiator and a long wavelength photoinitiator on one surface of a synthetic resin film such as a PET resin film, and then irradiate the short wavelength ultraviolet rays to make the ultraviolet resin layer semi-cured and the resin layer In the semi-cured state, by forming the fine iron pattern on it by embossing method, and irradiating the ultraviolet rays of the long wavelength and completely hardening it, and depositing the metal, it is easy to form the fine iron pattern. The present invention was completed by confirming that a film for use could be obtained.
본 발명은 홀로그램을 나타내게 하는 미세요철무늬를 용이하게 형성시켜줄 수 있으면서 내용제성과 표면경도가 우수한 홀로그래프용 필름의 제조방법에 관한 것이다.The present invention relates to a method for producing a holographic film having excellent solvent resistance and surface hardness while being able to easily form a fine concave-convex pattern showing a hologram.
본 발명의 특징은 홀로그래프용 필름에 있어서, 플라스틱필름위에 형성시켜주는 미세요철무늬층을 단파장광개시제와 장파장광개시제를 함께 함유하는 자외선경화수지로 형성시키고, 이수지층에 단파장의 자외선을 조사, 이수지층을 반경화시킨 상태에서 엠보싱가공방법으로 미세요철무늬를 형성시킨 후 여기에 장파장의 자외선을 조사, 자외선경화수지층을 완전히 경화시키고 그 위에 금속 증착층을 형성시키는 홀로그래프용 필름의 제조방법에 관한 것이다.A feature of the present invention is that in the holographic film, the micro-convex pattern layer formed on the plastic film is formed of an ultraviolet curable resin containing both a short wavelength photoinitiator and a long wavelength photoinitiator, and irradiated with short wavelength ultraviolet rays to the resin layer, and the resin layer. After forming a fine concave pattern by the embossing method in a semi-cured state, and irradiated with long-wave ultraviolet rays, the UV curable resin layer is completely cured and a metal deposition layer is formed thereon. will be.
이하 실시예를 들어 본 발명을 구체적으로 설명한다.The present invention will be described in detail with reference to the following Examples.
실시예 1Example 1
<자외선경화수지의 제조><Production of UV Curing Resin>
일반적으로 자외선경화수지는 반복단위가 적은 저분자량의 중합체(oligomer : 이하 올리고머라 한다) 및 단량체(monomer: 이하 모노머라 한다)및 용제 가용성 수지와 광개시제(Photoinitiator)및 유기용제로 구성된다. 여기에 광개시제는 자외선 조사에 의하여 중합개시제의 역할을 하는 물질을 말하며, 유기용제는 메틸에틸케톤이나 톨루엔 같은 용제를 말하며 유기용제가용성수지는 유기용제에 잘 녹는 수지를 말한다.UV curable resins generally consist of low molecular weight polymers (oligomers) and monomers (monomers), solvent-soluble resins, photoinitiators and organic solvents with few repeating units. Here, the photoinitiator refers to a material that acts as a polymerization initiator by UV irradiation, the organic solvent refers to a solvent such as methyl ethyl ketone or toluene, and the organic solvent soluble resin refers to a resin that is well soluble in the organic solvent.
본 발명에서는 단파장광개시제와 장파장광개시제를 혼합 사용한다. 여기에서 단파장광개시제는 파장이 250nm이하인 자외선에 감응하는 광개시제를 의미하며 장파장광개시제는 400nm이하인 자외선에 감응하는 광개시제를 말한다.In the present invention, a short wavelength photoinitiator is mixed with a long wavelength photoinitiator. Here, the short wavelength photoinitiator refers to a photoinitiator that is sensitive to ultraviolet rays having a wavelength of 250 nm or less, and the long wavelength photoinitiator refers to a photoinitiator that is sensitive to ultraviolet rays of 400 nm or less.
본 발명에서 사용될 수 있는 올리고머는 에폭시 아크릴레이트, 우레탄 아크릴레이트, 폴리에스텔 아크릴레이트, 아크릭 아크릴레이트, 아민변성 아크릴레이트, 우레탄메타아크릴레이트 등이 있고, 이들을 단독 또는 혼합 사용할 수 있다.The oligomers that can be used in the present invention include epoxy acrylate, urethane acrylate, polyester acrylate, acryl acrylate, amine-modified acrylate, urethane methacrylate, and the like, and these may be used alone or in combination.
모너머로서는 라우릴 아크릴레이트, 이소보닐 아크릴레이트, 이소데실아크릴레이트, 스티어릴 아크릴레이트, 1.6헥산디올 디아크릴레이트, 디에틸렌글리콜 디아크릴레이트, 네오펜틸글리콜 디아크릴레이트, 펜타에리스리톨 테트라아크릴레이트, 트리 메틸올 프로판 트리아크릴레이트, 펜타에리스리톨트리아크릴레이트, 펜타에리스리톨 테트라아크릴레이트, 펜타에리스리톨 트리아크릴레이트, 펜타에리스리톨 테트라아크릴레이트, 디펜타에리스리톨 펜타 아크릴레이트, 디펜타에리스리톨 핵사아크릴레이트 등을 단독 또는 혼합하여 사용할 수 있다.The monomers include lauryl acrylate, isobornyl acrylate, isodecyl acrylate, styryl acrylate, 1.6 hexanediol diacrylate, diethylene glycol diacrylate, neopentyl glycol diacrylate, pentaerythritol tetraacrylate, Trimethylol propane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol nuxaacrylate and the like alone or mixed Can be used.
단파장광개시제로서는 디페닐케톤 벤질디메틸케탈, 2-하이드록시-2-메틸-1-페닐-1-온, 4-하이드록시 사이클로페닐케톤이 있고, 장파장광개시제로서는 2.4.6-트리메틸 벤조일 디페닐포스핀옥사이드, 2-메틸-1-(4-메틸티오)-페닐-2-모폴리노푸로판-2-온, 2-비스(2.6-디메톡시벤조일)-2.4.4-트리메틸 포스핀옥사이드, 2.4-디에틸티오 옥산톤, 4-디메틸 아미노 벤조익에시드 에틸에스텔, 2-이소푸로필티오옥산톤, 4-이소푸로필티오옥산톤 등이 있다.The short wavelength photoinitiator includes diphenyl ketone benzyl dimethyl ketal, 2-hydroxy-2-methyl-1-phenyl-1-one and 4-hydroxy cyclophenyl ketone, and the long wavelength photoinitiator is 2.4.6-trimethyl benzoyl diphenylphosphine. Oxide, 2-methyl-1- (4-methylthio) -phenyl-2-morpholinopuropan-2-one, 2-bis (2.6-dimethoxybenzoyl) -2.4.4-trimethyl phosphineoxide, 2.4 -Diethylthio oxanthone, 4-dimethyl amino benzoic acid ethyl ester, 2-isofurophyl thiooxanthone, 4-isofurophyl thiooxanthone, etc. are mentioned.
유기용제 가용성 수지로서는 로진에스텔수지, 석유수지, 스틸렌-이스프렌-스틸렌수지, 니트로 셀룰로오스, 에틸셀룰로오스 아세테이트, 부틸 셀룰로오스 아세테이트, 아크릴수지 우레탄 아크릴레이트, 에폭시 아크릴레이트, 에틸렌 비닐아세테이트, 쿠마론인덴수지 등이 사용될 수 있다. 유기용제로서는 메틸 에틸케톤(MEK) 또는 톨루엔이 사용되며 이들을 50중량%씩 혼합하여서된 혼합용제가 가장 적합하다.Organic solvent soluble resins include rosin ester resin, petroleum resin, styrene-isoprene-styrene resin, nitro cellulose, ethyl cellulose acetate, butyl cellulose acetate, acrylic resin urethane acrylate, epoxy acrylate, ethylene vinyl acetate, coumarone indene resin, etc. This can be used. As the organic solvent, methyl ethyl ketone (MEK) or toluene is used, and a mixed solvent obtained by mixing them by 50% by weight is most suitable.
다음 각 실시예에서 사용할 자외선경화수지조성물을 다음 [표 1]에 기재된 조성에 따라 제조하였다.UV curable resin compositions to be used in the following Examples were prepared according to the compositions shown in Table 1 below.
[표 1]TABLE 1
자외선경화수지제조용 조성물의 조성예Composition example of composition for manufacturing ultraviolet curing resin
<홀로그래프용 필름의 제조><Production of holographic film>
실시예 1Example 1
40㎛두께의 PET필름표면에 상기 [표 1] 실시예 1에 기재된 조성의 자외선경화수지조성물을 건조도막의 두께가 5㎛되도록 그라비아 인쇄방법으로 도포한다.On the surface of PET film having a thickness of 40 μm, the ultraviolet curable resin composition having the composition described in Example 1 was applied by a gravure printing method so that the thickness of the dry coating film was 5 μm.
이를 100℃의 건조실에서 60m/분의 속도로 이동시키면서 약 30초간 열풍 건조시킨다.It is dried by hot air for about 30 seconds while moving at a speed of 60 m / min in a drying chamber at 100 ° C.
이를 250nm파장의 자외선등 으로 자외선을 조사시키면 자외선경화수지층을 완전경화되지 않고 반경화된 상태를 유지한다.When the ultraviolet rays are irradiated with ultraviolet light having a wavelength of 250 nm, the ultraviolet curable resin layer is not cured completely but remains in a semi-cured state.
자외선경화수지를 완전경화되지 않고 반경화 상태를 유지시켜주기 위해서는 조사되는 단파장자외선의 파장이 250nm이하이어야 하며, 50~250nm의 것이 적당하다.In order to maintain the semi-cured state without completely curing the UV curable resin, the wavelength of the irradiated short wavelength ultraviolet ray should be 250 nm or less, and 50 ~ 250 nm is appropriate.
여기에 엠보싱방법으로 홀로그램을 나타내게 하는 미세요철무늬를 형성시킨 후 여기에 파장이 400nm이하인 장파장자외선을 조사하면 자외선경화수지는 완전히 경화된다.Here, after forming a fine concave-convex pattern that shows a hologram by an embossing method, when ultraviolet rays having a wavelength of 400 nm or less are irradiated thereto, the ultraviolet curable resin is completely cured.
자외선경화수지를 완전히 경화시켜주기 위해서는 조사되는 장파장자외선의 파장이 400nm이하이어야 하며, 250~400nm의 것이 적당하다.In order to completely cure the UV-curing resin, the wavelength of the long-wavelength ultraviolet ray to be irradiated should be 400 nm or less, and 250 to 400 nm is appropriate.
자외선경화수지를 완전히 경화시킨 후 그 표면에 금속진공증착시키면 본 발명의 홀로그래프용 필름이 얻어진다.When the ultraviolet curable resin is completely cured, metal vacuum deposition on the surface thereof yields the holographic film of the present invention.
필름표면에 진공증착시키는 기술을 이 분야에서 이미 잘 알려져 있는 기술이며, PET필름대신에 나일론수지, 폴리카보네이트수지로된 필름을 사용할 수도 있다.Vacuum deposition on the film surface is well known in the art, and a film made of nylon resin or polycarbonate resin may be used instead of PET film.
실시예 2Example 2
자외선경화수지조성물을 상기[표 1]의 실시예 2의 것을 사용한 것을 제외하고는 실시예 1과 같은 방법으로 홀로그래프용 필름을 제조하고 이 필름의 표면경도, 내용제성 등을 시험하고 그 결과를 다음 [표 2]에 나타냈다.A holographic film was prepared in the same manner as in Example 1, except that the ultraviolet curable resin composition was used in Example 2 of Table 1 above, and the surface hardness, solvent resistance, and the like of the film were tested and the results were obtained. The following [Table 2] is shown.
[표 2] 홀로그래프용 필름의 물성시험표[Table 2] Physical property test table of holographic film
본 발명의 방법으로 제조되는 홀로그래프용 필름의 자외선경화수지층이 완전히 경화되지 않은 상태에서 여기에 홀로그램을 나타나게 하는 미세요철무늬를 형성시켜줌으로서 미세요철무늬의 형성이 용이하게되며, 미세요철무늬를 형성시킨 후 완전경화시켜줌으로서 표면경도와 내용제성등이 우수하게 되어 외부충격에 의하여 훼손될 가능성이 크게 줄어들게 된다.In the state of the UV-curable resin layer of the holographic film produced by the method of the present invention is not completely cured, by forming a fine rough pattern to make the hologram appear here, it is easy to form a fine rough pattern, After hardening, it is completely hardened, so the surface hardness and solvent resistance are excellent, and the possibility of damage by external shock is greatly reduced.
본 발명의 방법은 홀로그램을 나타내게 하는 미세요철무늬를 형성시켜주는 것이 용이하면서 경도와 내용제성이 우수한 홀로그래프용 필름을 제공할 수 있는 효과를 갖는다.The method of the present invention has an effect of providing a holographic film having excellent hardness and solvent resistance while being easy to form a fine concave-convex pattern that shows a hologram.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0050866AKR100498711B1 (en) | 2003-07-24 | 2003-07-24 | Manufacturing method of Holograph film |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0050866AKR100498711B1 (en) | 2003-07-24 | 2003-07-24 | Manufacturing method of Holograph film |
| Publication Number | Publication Date |
|---|---|
| KR20050011832A KR20050011832A (en) | 2005-01-31 |
| KR100498711B1true KR100498711B1 (en) | 2005-07-01 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-2003-0050866AExpired - Fee RelatedKR100498711B1 (en) | 2003-07-24 | 2003-07-24 | Manufacturing method of Holograph film |
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| KR (1) | KR100498711B1 (en) |
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|---|---|---|---|---|
| KR100845636B1 (en) | 2006-10-11 | 2008-07-10 | 한국정보통신대학교 산학협력단 | How to make and play hologram labels |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100845636B1 (en) | 2006-10-11 | 2008-07-10 | 한국정보통신대학교 산학협력단 | How to make and play hologram labels |
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| KR20050011832A (en) | 2005-01-31 |
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