TW201723110A - 硬塗膜及具有該膜之可撓式顯示器 - Google Patents
硬塗膜及具有該膜之可撓式顯示器 Download PDFInfo
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- TW201723110A TW201723110A TW105125046A TW105125046A TW201723110A TW 201723110 A TW201723110 A TW 201723110A TW 105125046 A TW105125046 A TW 105125046A TW 105125046 A TW105125046 A TW 105125046A TW 201723110 A TW201723110 A TW 201723110A
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- Prior art keywords
- hard coat
- coat layer
- film
- meth
- acrylate
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
本發明提供一種用於可撓式顯示器之硬塗膜,其包含透明基板;在該透明基板之一個表面上形成之第一硬塗層;及在該透明基板之另一表面上形成之第二硬塗層,其中該第一硬塗層及該第二硬塗層各自厚度為5μm至50μm且滿足15kPa.m至130kPa.m之勁度,且可撓式顯示器具有該硬塗膜。根據本發明之硬塗膜具有高硬度及極佳可撓性。
Description
本發明係關於一種硬塗膜及具有該膜之可撓式顯示器。特定言之,本發明提供一種具有良好硬度及可撓性之硬塗膜及具有該硬塗膜之可撓式顯示器。
硬塗膜已用於保護各種影像顯示器之表面,該等顯示器包括液晶顯示裝置(LCD)、電致發光(EL)顯示器、電漿顯示器(PD)、場發射顯示器(FED)及其類似物。
此類硬塗膜應具有高硬度及良好抗刮擦性,且在其製造或使用期間,其末端處不會出現翹曲。近年來,可撓式顯示器作為下一代顯示裝置得到越來越多的關注,因為可撓式顯示器應用諸如塑膠之可撓性材料代替不具有可撓性之玻璃基板,使得即使像紙一樣將其彎曲,其仍能夠維持顯示器效能。因此,亦需要具有適當可撓性之硬塗膜以便防止裂紋生成。
韓國專利申請公開案第2014-0027023號揭示了一種硬塗膜,其包含支撐基板;在該基板之一個表面上形成且包含第一光可固化交聯共聚物之第一硬塗層;及在該基板之另一表面上形成且包含第二光可固化交聯共聚物及分散在該第二光可固化交聯共聚物中之無機粒子的第二硬塗層,其藉此展現高硬度、抗衝擊性及抗刮擦性及高透明度。
然而,該硬塗膜之可撓性不足且難以塗覆於可撓式顯示器中。
本發明之目標在於提供一種用於可撓式顯示器之硬塗膜,該膜具有可撓性以及良好硬度。
本發明之另一目標在於提供一種具有該硬塗膜之可撓式顯示器。
根據本發明之一個態樣,提供一種硬塗膜,其包含:透明基板;在該透明基板之一個表面上形成之第一硬塗層;及在該透明基板之另一表面上形成之第二硬塗層,其中第一硬塗層及第二硬塗層中之每一者的厚度為5μm至50μm且滿足15kPa.m至130kPa.m之勁度,其由以下等式1定義:[等式1]勁度(kPa.m)=壓縮彈性模數(GPa)×層厚度(μm)
在本發明之一個實施例中,第一硬塗層之壓縮彈性模數可為3,000MPa至15,000MPa,且第二硬塗層之壓縮彈性模數可為3,000MPa至10,000MPa。
在本發明之一個實施例中,第一硬塗層在750g之負荷下測試之鉛筆硬度可為4H或大於4H,且第二硬塗層在750g之負荷下測試之鉛筆硬度可為H或大於H。
在本發明之一個實施例中,在第二硬塗層附著於黏著劑之狀態下,硬塗膜在750g之負荷下測試之鉛筆硬度可為H或大於H。
根據本發明之另一態樣,提供具有該硬塗膜之可撓式顯示器。
本發明之硬塗膜具有高硬度及極佳可撓性,且因此其可有效用於可撓式顯示器中。
在下文中較詳細地描述本發明。
本發明之一個實施例係關於一種用於可撓式顯示器之硬塗膜,其包含透明基板;在該透明基板之一個表面上形成之第一硬塗層;及在該透明基板之另一表面上形成之第二硬塗層,其中第一硬塗層及第二硬塗層中之每一者的厚度為5μm至50μm且滿足15kPa.m至130kPa.m之勁度,其由以下等式1定義:[等式1]勁度(kPa.m)=壓縮彈性模數(GPa)×層厚度(μm)
根據本發明之一個實施例的硬塗膜在其兩個表面上具有硬塗層,該等硬塗層具有5μm至50μm之薄厚度及15kPa.m至130kPa.m之勁度,藉此提供可撓性以及良好硬度。特定言之,當硬塗膜合攏或彎曲時,自向外方向對其施加張應力,其使得硬塗層中之裂紋生成得到緩解。
在本發明之一個實施例中,第一硬塗層之壓縮彈性模數可為3,000MPa至15,000MPa,且第二硬塗層之壓縮彈性模數可為3,000MPa至10,000MPa。藉由將各硬塗層之壓縮彈性模數控制在該等範圍內,其硬度及可撓性可得到改良。
在本發明中,量測壓縮彈性模數之方法不受特定限制。舉例而言,可根據下文實驗實例中所展示之方法來量測壓縮彈性模數。
在本發明之一個實施例中,第一硬塗層在750g之負荷下測試之
鉛筆硬度可為4H或大於4H,且第二硬塗層在750g之負荷下測試之鉛筆硬度可為H或大於H。
在本發明中,量測鉛筆硬度之方法不受特定限制。舉例而言,可根據下文實驗實例中所展示之方法來量測鉛筆硬度。
在本發明之一個實施例中,在第二硬塗層附著於黏著劑之狀態下,硬塗膜在750g之負荷下測試之鉛筆硬度可為H或大於H。黏著劑之厚度可為25μm或大於25μm,且其可為壓敏黏著劑(PSA)或光學透明黏著劑(OCA)。
在本發明中,在附著黏著劑之後量測鉛筆硬度之方法不受特定限制。舉例而言,可根據下文實驗實例中所展示之方法來量測鉛筆硬度。
根據本發明之一個實施例,可藉由在透明基板之兩個表面上塗覆且固化各硬塗料組合物以形成第一硬塗層及第二硬塗層來製備硬塗膜。
作為透明基板,若其具有透明度,則可使用任何塑膠膜。舉例而言,透明基板可選自由以下各者所製成之膜:具有環烯單體單元,諸如降冰片烯或多環降冰片烯單體之環烯衍生物;纖維素(二乙醯纖維素、三乙醯纖維素、乙酸丁酸纖維素、異丁酸纖維素、丙酸纖維素、丁酸纖維素、乙酸丙酸纖維素);乙烯-乙酸乙烯酯、聚酯、聚苯乙烯、聚醯胺、聚醚醯亞胺、聚丙烯酸酯、聚醯亞胺、聚醚碸、聚碸、聚乙烯、聚丙烯、聚甲基戊烯、聚氯乙烯、聚偏二氯乙烯、聚乙烯醇、聚乙烯縮醛、聚醚酮、聚醚醚酮、聚甲基丙烯酸甲酯、聚對苯二甲酸伸乙酯、聚對苯二甲酸伸丁酯、聚萘二甲酸伸乙酯、聚碳酸酯、聚胺基甲酸酯或環氧樹脂之共聚物。此外,可使用非拉伸、單軸拉伸或雙軸拉伸膜。
透明基板之厚度不受特定限制。其可在8μm至1,000μm,特定言
之,20μm至150μm範圍內。若透明基板之厚度小於8μm,則硬塗膜之強度可能會減小而使可加工性降低。若透明基板之厚度高於1,000μm,則硬塗膜之透明度可能會降低或其重量可能會有所升高。
用於形成第一硬塗層及第二硬塗層之硬塗料組合物可包含光可固化樹脂、光引發劑及溶劑。特定言之,用於形成第一硬塗層之硬塗料組合物可進一步包含直徑為10nm至100nm的含有奈米二氧化矽粒子之二氧化矽溶膠。
光可固化樹脂可包含光可固化(甲基)丙烯酸酯低聚物及/或單體。
光可固化(甲基)丙烯酸酯低聚物可為環氧(甲基)丙烯酸酯、胺基甲酸酯(甲基)丙烯酸酯及習用類似低聚物。其中,胺基甲酸酯(甲基)丙烯酸酯為更佳的。可藉由具有羥基之多官能(甲基)丙烯酸酯與具有異氰酸酯基之化合物在催化劑存在下之反應來製備胺基甲酸酯(甲基)丙烯酸酯。
具有羥基之多官能(甲基)丙烯酸酯可為選自由以下組成之群的至少一者:2-(甲基)丙烯酸羥乙酯、2-(甲基)丙烯酸羥基異丙酯、4-(甲基)丙烯酸羥丁酯、己內酯開環羥基丙烯酸酯、異戊四醇三/四(甲基)丙烯酸酯之混合物及二異戊四醇五/六(甲基)丙烯酸酯之混合物。
此外,具有異氰酸酯基之化合物可為選自由以下組成之群的至少一者:衍生自1,4-二異氰酸酯基丁烷、1,6-二異氰酸酯基己烷、1,8-二異氰酸酯基辛烷、1,12-二異氰酸酯基十二烷、1,5-二異氰酸酯基-2-甲基戊烷、三甲基-1,6-二異氰酸酯基己烷、1,3-雙(異氰酸酯基甲基)環己烷、反-1,4-環己烯二異氰酸酯、4,4'-亞甲基-雙(異氰酸環己酯)、異佛爾酮二異氰酸酯、甲苯-2,4-二異氰酸酯、甲苯-2,6-二異氰酸酯、二甲苯-1,4-二異氰酸酯、四甲基二甲苯-1,3-二異氰酸酯、1-氯甲基-2,4-二異氰酸酯、4,4'-亞甲基-雙(2,6-二甲基苯基異氰酸酯)、4,4'-氧基
雙(異氰酸苯酯)之三官能異氰酸酯;衍生自二異氰酸己二酯之三官能異氰酸酯;及三甲基丙醇與二異氰酸甲苯酯之加合物。
單體可為習知用於此項技術中之任一者。單體之特定實例可包括具有光可固化官能基,諸如(甲基)丙烯醯基、乙烯基、苯乙烯基、烯丙基或類似基團之不飽和基團,較佳(甲基)丙烯醯基之化合物。
具有(甲基)丙烯醯基之單體可為選自由組成之群的至少一者:新戊二醇丙烯酸酯、1,6-己二醇(甲基)丙烯酸酯、丙二醇二(甲基)丙烯酸酯、三乙二醇二(甲基)丙烯酸酯、二丙二醇二(甲基)丙烯酸酯、聚乙二醇二(甲基)丙烯酸酯、聚丙二醇二(甲基)丙烯酸酯、三羥甲基丙烷三(甲基)丙烯酸酯、三羥甲基乙烷三(甲基)丙烯酸酯、1,2,4-環己烷四(甲基)丙烯酸酯、五甘油三(甲基)丙烯酸酯、異戊四醇四(甲基)丙烯酸酯、異戊四醇三(甲基)丙烯酸酯、二異戊四醇三(甲基)丙烯酸酯、二異戊四醇五(甲基)丙烯酸酯、二異戊四醇四(甲基)丙烯酸酯、二異戊四醇六(甲基)丙烯酸酯、三異戊四醇三(甲基)丙烯酸酯、三異戊四醇六(甲基)丙烯酸酯、雙(2-羥乙基)異氰尿酸酯二(甲基)丙烯酸酯、(甲基)丙烯酸羥乙酯、(甲基)丙烯酸羥丙酯、(甲基)丙烯酸羥丁酯、(甲基)丙烯酸異辛酯、(甲基)丙烯酸異癸酯、(甲基)丙烯酸硬脂醯基酯、(甲基)丙烯酸四氫糠酯、(甲基)丙烯酸苯氧基乙酯及(甲基)丙烯酸異冰片酯。
以100wt%之硬塗料組合物計,光可固化樹脂可以20wt%至90wt%,較佳30wt%至60wt%之量存在。若光可固化樹脂之量小於20wt%,則難以增加塗層厚度且獲得足夠機械強度。若光可固化樹脂之量高於90wt%,則塗層特性可能會嚴重降低,藉此產生不良外觀且使得其難以獲得均勻厚度。
光引發劑可為(但不限於)此項技術中所正使用之任一者。具體言之,光引發劑可為選自由以下組成之群的至少一者:2-甲基-1-[4-(甲
硫基)苯基]2-嗎啉-丙酮-1、二苯基酮、苯甲基二甲基縮酮、2-羥基-2-甲基-1-苯基-1-酮、4-羥基環己基苯基酮、二甲氧基-2-苯基苯乙酮、蒽醌、茀、三苯胺、咔唑、3-甲基苯乙酮、4-氯苯乙酮、4,4-二甲氧基苯乙酮、4,4-二胺二苯甲酮、1-羥基環己基苯酮及二苯甲酮。
以100wt%之硬塗料組合物計,光引發劑可以0.1wt%至10wt%之量存在。若光引發劑之量小於0.1wt%,則固化率可能會有所降低。若光引發劑之量高於10wt%,則可能會過度固化而在硬塗層中引起裂紋生成。
溶劑可為(但不限於)此項技術中所正使用之任一者。溶劑之特定實例可包括醇類(甲醇、乙醇、異丙醇、丁醇等)、賽路蘇(cellosolve)(甲基賽路蘇、乙基賽路蘇等)、酮類(甲基乙基酮、甲基丁基酮、甲基異丁基酮、二乙酮、二丙酮、環己酮等)、己烷類(己烷、庚烷、辛烷等)、苯類(苯、甲苯、二甲苯等)。此等溶劑可單獨使用或兩者或大於兩者組合使用。
以100wt%之硬塗料組合物計,溶劑可以10wt%至80wt%,較佳30wt%至60wt%之量存在。若溶劑之量小於10wt%,則黏度可能會增加而降低可加工性。若溶劑之量高於80wt%,則乾燥及固化時間可能會增加且難以增加硬塗膜之厚度。
若需要,硬塗料組合物可進一步包含此項技術中習用之其他組分,例如,調平劑、UV穩定劑、熱穩定劑、抗氧化劑、界面活性劑、潤滑劑、防污劑等。
可使用調平劑來為由硬塗料組合物所形成之塗膜提供平滑度且增強組合物之塗層特性。作為調平劑,可使用市售之矽型、氟型及丙烯酸聚合物型調平劑。舉例而言,可使用BYK-3530、BYK-323、BYK-331、BYK-333、BYK-337、BYK-373、BYK-375、BYK-377及BYK-378(BYK Chemie)、TEGO Glide 410、TEGO Glide 411、TEGO
Glide 415、TEGO Glide 420、TEGO Glide 432、TEGO Glide 435、TEGO Glide 440、TEGO Glide 450、TEGO Glide 455、TEGO Rad 2100、TEGO Rad 2200N、TEGO Rad 2250、TEGO Rad 2300及TEGO Rad 2500(Degussa)、FC-4430及FC-4432(3M)。以100wt%之硬塗料組合物計,調平劑可以0.1wt%至1wt%之量存在。
可使用模塗機、氣刀、逆輥、噴霧器、刮刀、鑄造、凹板、微凹板、旋塗等藉由已知塗佈方法將硬塗料組合物以適合方式塗覆於透明基板上。
將硬塗料組合物塗覆於透明基板上之後,可藉由在30℃至150℃之溫度下蒸發揮發物10秒至一小時,更具體言之,30秒至30分鐘,之後進行UV固化來實施乾燥方法。可藉由呈約0.01J/cm2至10J/cm2,特定言之,0.1J/cm2至2J/cm2之UV射線之照射進行UV固化。
本發明之一個實施例係關於一種具有硬塗膜之可撓式顯示器。舉例而言,本發明之硬塗膜可附著於可撓式顯示器之窗。
根據本發明之一個實施例的硬塗膜可用於各種操作模式之液晶裝置(LCD)中,包括反射型、透射型、透射反射型、扭轉向列(TN)型、超扭轉向列(STN)型、光學補償彎曲型(OCB)、混合排列向列(HAN)型、垂直排列(VA)型及共平面切換(IPS)型LCD。此外,根據本發明之一個實施例的硬塗膜可用於各種圖像顯示裝置中,包括電漿顯示器、場發射顯示器、有機EL顯示器、無機EL顯示器、電子紙及類似裝置。
本發明藉由以下實例、比較實例及實驗實例進一步展示,該等實例不應解釋為限制本發明之範疇。
混合25wt%二氧化矽溶膠之異丙醇溶液(IPA-ST-L,Nissan Chemical,粒度為20nm至30nm)、15wt%十(10)官能丙烯酸胺基甲酸
酯低聚物(UV1000,Shin-A T&C)、18.5wt%三官能單體(M340,MIRAMER)、1.2wt%光引發劑(I-184,BASF)、0.3wt%調平劑(BYK-3530,BYK Chemie)及40wt%甲基乙基酮(MEK),得到形成第一硬塗層之組合物。
混合7wt%十官能丙烯酸胺基甲酸酯低聚物(UV1000,Shin-A T&C)、38.5wt%三官能單體(M340,MIRAMER)、1.2wt%光引發劑(I-184,BASF)、0.3wt%調平劑(BYK-3530,BYK Chemie)及53wt%甲基乙基酮(MEK),得到形成第二硬塗層之組合物。
混合7wt%十官能丙烯酸胺基甲酸酯低聚物(UV1000,Shin-A T&C)、38.5wt%二官能單體(M200,MIRAMER)、1.2wt%光引發劑(I-184,BASF)、0.3wt%調平劑(BYK-3530,BYK Chemie)及53wt%甲基乙基酮(MEK),得到形成第二硬塗層之組合物。
混合38wt%十官能丙烯酸胺基甲酸酯低聚物(UV1000,Shin-A T&C)、7.5wt%二官能單體(M200,MIRAMER)、1.2wt%光引發劑(I-184,BASF)、0.3wt%調平劑(BYK-3530,BYK Chemie)及53wt%甲基乙基酮(MEK),得到形成第二硬塗層之組合物。
以20μm之厚度將製備實例1中所製備的形成第一硬塗層之組合物塗佈於聚醯亞胺(PI)膜(50μm)之一個表面上,在80℃烘箱中乾燥1分鐘,且藉由使用高壓汞燈將其曝露於350mJ/cm2之光加以固化,形成第一硬塗層。以5μm之厚度將製備實例2-1中所製備的形成第二硬
塗層之組合物塗佈於聚醯亞胺(PI)膜之另一表面上,在80℃烘箱中乾燥2分鐘,且藉由使用高壓汞燈將其曝露於350mJ/cm2之光加以固化,形成第二硬塗層。由此,製備出硬塗膜。
根據下文所述之方法針對所製備之硬塗膜的特性對其進行量測,且其結果展示於下表1中。
重複實例1之程序,不同之處在於,以15μm之厚度塗佈形成第二硬塗層之組合物以製備硬塗膜。
重複實例1之程序,不同之處在於,以25μm之厚度塗佈形成第二硬塗層之組合物以製備硬塗膜。
重複實例1之程序,不同之處在於未形成第二硬塗層來製備硬塗膜。
重複實例1之程序,不同之處在於,以10μm之厚度塗佈製備實例2-2中所製備的形成第二硬塗層之組合物以製備硬塗膜。
重複實例1之程序,不同之處在於,以10μm之厚度塗佈製備實例2-3中所製備的形成第二硬塗層之組合物以製備硬塗膜。
根據下文所述之方法針對所製備之硬塗膜的特性對其進行量測,且其結果展示於下表1中。
針對各硬塗層在其表面中心處之壓縮彈性模數,藉由奈米壓痕法使用PICODENTOR HM-500(Fisher Instruments)對各層進行量測。
在25℃及50%濕度下進行量測。對於各硬塗層,進行5次量測且計算其平均值。
將硬塗膜置放於玻璃基板上且使用三菱鉛筆(Mitsubishi pencil)在750g之負荷下經由鉛筆硬度測試器(PHT,Sukbo Science,韓國)對其鉛筆硬度進行量測。對於各鉛筆硬度,進行5次量測。
同時,藉由在玻璃基板上形成厚度為50μm之黏著層且使硬塗膜附著於黏著層上,以使得第二硬塗層與黏著層接觸(按自頂部至底部之順序為:第一硬塗層/基板/第二硬塗層/黏著劑/玻璃基板)來評估附著黏著劑之後的鉛筆硬度。
在大小設定為4mm及6mm之週期性彎曲測試器(Covotech)上使硬塗膜彎曲,以使得第一硬塗層向內彎曲且檢查膜上所生成之裂紋。藉由重複200,000次彎曲進行此類彎曲測試。將彎曲次數輸入上述測試器中,之後在生成裂紋(斷裂)時經由實時攝影機確定位置及彎曲次數。藉由n=3進行各評估。
藉由以下等式1,使用如上文所量測之壓縮彈性模數計算出硬塗膜之勁度。
[等式1]勁度(kPa.m)=壓縮彈性模數(GPa)×層厚度(μm)
如自表1可見,與在一個表面上僅具有單一硬塗層之比較實例1的硬塗膜及其中勁度值偏離15kPa.m至130kPa.m之範圍的比較實例2及3之硬塗膜相比,實例1至實例3之硬塗膜在其兩個表面上具有硬塗層且滿足在該範圍內之勁度值,由此在附著黏著劑之後展現高鉛筆硬度。此外,在彎曲測試中,實例1至實例3之硬塗膜展現出比比較實例1至比較實例3之硬塗膜好的可撓性結果,亦即在同一厚度條件下,實例1至實例3之膜會在較高彎曲次數下破裂。因此,實例1至實例3之硬塗膜可有效用於可撓式顯示器中。
儘管已展示且描述本發明之特定實施例,但熟習此項技術者應瞭解,並不意欲將本發明限制於較佳實施例,且對熟習此項技術者顯而易見的是,可在不背離本發明之精神及範疇下進行各種變化及修改。
因此,本發明之範疇將由隨附申請專利範圍及其等效物界定。
Claims (8)
- 一種硬塗膜,其用於可撓式顯示器,該硬塗膜包含:透明基板;在該透明基板之一個表面上形成之第一硬塗層;及在該透明基板之另一表面上形成之第二硬塗層,其中該第一硬塗層及該第二硬塗層中之每一者的厚度為5μm至50μm且滿足15kPa.m至130kPa.m之勁度,其由以下等式1定義:[等式1]勁度(kPa.m)=壓縮彈性模數(GPa)×層厚度(μm)。
- 如請求項1之硬塗膜,其中該第一硬塗層之壓縮彈性模數為3,000MPa至15,000MPa,且該第二硬塗層之壓縮彈性模數為3,000MPa至10,000MPa。
- 如請求項1之硬塗膜,其中該第一硬塗層在750g之負荷下測試之鉛筆硬度為4H或大於4H,且該第二硬塗層在750g之負荷下測試之鉛筆硬度可為H或大於H。
- 如請求項1之硬塗膜,其中在該第二硬塗層附著於黏著劑之狀態下,該膜在750g之負荷下測試之鉛筆硬度為H或大於H。
- 如請求項4之硬塗膜,其中該黏著劑之厚度為25μm或大於25μm。
- 如請求項4之硬塗膜,其中該黏著劑為壓敏黏著劑(PSA)或光學透明黏著劑(OCA)。
- 如請求項1之硬塗膜,其中該等第一硬塗層及第二硬塗層分別由硬塗料組合物形成,該硬塗料組合物包含光可固化樹脂、光引 發劑及溶劑。
- 一種可撓式顯示器,其具有如請求項1至7中任一項之硬塗膜。
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WO2020263633A1 (en) | 2019-06-26 | 2020-12-30 | Applied Materials, Inc. | Flexible multi-layered cover lens stacks for foldable displays |
WO2021108998A1 (en) * | 2019-12-03 | 2021-06-10 | Schott Glass Technologies (Suzhou) Co. Ltd. | Foldable cover article with reduced hazardous projects |
KR102232514B1 (ko) * | 2020-07-13 | 2021-03-25 | 동우 화인켐 주식회사 | 플렉시블 윈도우 적층체 및 이를 포함하는 화상 표시 장치 |
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JP2013101177A (ja) | 2011-11-07 | 2013-05-23 | Keiwa Inc | ハードコートフィルム、透明導電性積層体及びタッチパネル |
JP2013117584A (ja) | 2011-12-01 | 2013-06-13 | Keiwa Inc | ハードコートフィルム、透明導電性積層体及びタッチパネル |
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JP2017036439A (ja) | 2017-02-16 |
KR20170017734A (ko) | 2017-02-15 |
KR101854524B1 (ko) | 2018-05-03 |
US20170036242A1 (en) | 2017-02-09 |
CN106443842A (zh) | 2017-02-22 |
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