TW201425049A - 影像顯示裝置用雙面黏著片材、附有離型薄膜之影像顯示裝置用雙面黏著片材及使用該等而成之影像顯示裝置 - Google Patents
影像顯示裝置用雙面黏著片材、附有離型薄膜之影像顯示裝置用雙面黏著片材及使用該等而成之影像顯示裝置 Download PDFInfo
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- TW201425049A TW201425049A TW102140653A TW102140653A TW201425049A TW 201425049 A TW201425049 A TW 201425049A TW 102140653 A TW102140653 A TW 102140653A TW 102140653 A TW102140653 A TW 102140653A TW 201425049 A TW201425049 A TW 201425049A
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- Prior art keywords
- double
- adhesive sheet
- sided adhesive
- image display
- display device
- Prior art date
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Abstract
本發明所提供的新穎影像顯示裝置用雙面黏著片材,係即便在貼合黏著片材的受黏面上出現因印刷等造成的高度差,仍可無間隙地密接狀貼合於受黏面。本發明的影像顯示裝置用雙面黏著片材1,係將從表面保護面板2、觸控板3及影像顯示面板之中選擇任二個受黏體予以貼合;其中,至少其中一受黏體(表面保護面板2)係在黏著雙面黏著片材1的受黏面2a上設有高度差部2b;雙面黏著片材1係將黏著於上述受黏面2a上的貼合面1a之面形狀,沿上述受黏面2a的略相同面形狀施行賦形。
Description
本發明係關於液晶顯示裝置(LCD)、有機EL顯示裝置(OLED)及電漿顯示器(PDP)等影像顯示裝置所使用的影像顯示裝置用雙面黏著片材、以及附有離型薄膜之影像顯示裝置用雙面黏著片材。又,本發明係關於使用該等影像顯示裝置用雙面黏著片材構成的影像顯示裝置。
近年,諸如智慧手機、平板電腦等觸控板方式的影像顯示裝置市場正急速成長中,要求式樣性、潮流性、裝飾性,且亦朝薄板化、輕量化、顏色變異化演進。
例如影像顯示裝置的表面保護面板有與強化玻璃一併使用丙烯酸樹脂板、聚碳酸酯板等塑膠材料,或者在表面保護面板上除辨視開口面部以外的周緣部之背面印刷係一般的黑色印刷(black printing)且施行白色印刷(white printing)的構件。
再者,觸控板係有採用例如:與玻璃感測器一起使用塑膠薄膜感測器,或使用由觸控板機能與表面保護面板呈一體化的鏡片觸控式(TOL)所構成構件,或者觸控板機能與影像顯示面板呈一體化的外嵌式
(on-cell)或內嵌式(in-cell)構成的構件。
再者,組合該等表面保護面板、觸控板、影像顯示面板(亦統稱為「影像顯示裝置用構成構件」),便形成觸控板方式的影像顯示裝置。
再者,為更加提升影像辨視性,一般係採取利用透明樹脂埋藏各影像顯示裝置用構成構件間之空隙的構造。
例如供埋藏空隙用的樹脂材料已知有如液狀接著劑、熱可塑性接著片材、黏著片材等。
液狀接著劑的情況,雖可在空隙中自由流動並樹脂密封,但會有:不易獲得辨視開口面部內的面內厚度精度,以及當施行紫外線照射而硬化時,於紫外線尚未照射於保護面板的印刷背面部而處於未硬化狀態下,會有電極及配線遭污染的問題,且未硬化的液狀樹脂經時會侵蝕影像顯示裝置內部的塑膠構件,導致發生溶劑龜裂情形、或在硬化部因硬化收縮而導致構件間出現剝離的顧慮。
再者,熱可塑性接著片材的情況,雖使該片材加熱熔融便可密封,但加熱熔融之際會有樹脂滲出情形、或因加熱線膨脹差而造成殘留應力、或因翹曲而導致經時剝落、或因加熱製程而導致節拍時間(tact time)拉長、或當低溫熔融材料的情況會有保管、輸送時的溫度管理問題顧慮。
就此點而言,當黏著片材的情況,可將該片材依常溫輕鬆地貼合,且面內尺寸精度非常佳、亦可縮短節拍時間、量產性亦優異。
專利文獻1及2有揭示貼合各影像顯示裝置用構成構件的黏著片
材。
[專利文獻1]日本專利特開2003-238915號公報
[專利文獻2]日本專利特開2004-231723號公報
近年隨影像顯示面板的顏色變異化,背面印刷除黑色之外尚有白色等出現。黑色的情況,背面印刷的厚度係5~20μm程度,但白色的情況,為隱藏來自影像顯示面板的洩光,印刷厚度便必需達40~80μm程度。
然而,液狀接著劑、熱可塑性接著片材係屬於完全流動的樹脂,但相對的黏著片材多少會有流動,當受黏體的表面凹凸較大時會有樹脂密封不完全的情形。
例如圖11所示,當對表面保護面板11的周緣部施行白色等印刷14時,會有高度差產生。此種情況下,若使表面保護面板11與觸控板12隔著黏著片材13進行貼合,便如圖12所示,在印刷14與辨視開口面15間之內角部會產生空隙16,導致辨視性變差、會因急激溫度變化而導致發生發泡‧剝離情形。
所以,在利用黏著片材13無間隙地貼合時,黏著片材13便要求
追蹤因印刷14造成的高度差,並能填充至角落的高度差追蹤性。
為賦予此種高度差追蹤性,雖有考慮將雙面黏著片材採取比較柔軟的設計,但若暴露於高溫高濕環境下、或暴露於急遽的溫度變化中,該雙面黏著片材便會有在貼合界面發生發泡、剝離問題的可能性。
另一方面,為解決此種發泡‧剝離的問題,雖有考慮將雙面黏著片材採取比較硬、且高凝聚力的設計,但此種設計的情況,會有導致雙面黏著片材的高度差追蹤性差之結果的可能性。
緣是,本發明目的在於提供一種新穎影像顯示裝置用雙面黏著片材即便在貼合黏著片材的受黏面上出現因印刷等造成的高度差,仍可無間隙地密接狀貼合於受黏面。
本發明者等假設藉由雙面黏著片材的材料設計,而賦予高度差追蹤性與耐發泡性時會有極限,經深入鑽研的結果,發現藉由預先對雙面黏著片材自體施行沿受黏體表面形狀的賦形加工,俾使無間隙地合致於該受黏體表面,便可解決上述問題,遂完成本發明。
即,本發明所提供的影像顯示裝置用雙面黏著片材,係用以將從表面保護面板、觸控板及影像顯示面板的影像顯示裝置用構成構件之中選擇任二個受黏體,予以貼合用的雙面黏著片材;其中,至少其中一受黏體係在黏著雙面黏著片材的受黏面上設有高度差部;雙面黏著片材係將與黏著於上述受黏面上的貼合面呈略相同之面形狀,沿上述
受黏面的面形狀施行賦形。
本發明的影像顯示裝置用雙面黏著片材,因為沿受黏面的面形狀賦形成與貼合面呈略同形狀的面形狀,因而即便受黏面上有因印刷等而造成的高度差,仍可無間隙地密接狀貼合於受黏面。
1‧‧‧影像裝置用雙面黏著片材
1a‧‧‧貼合面
1b‧‧‧凸部
2‧‧‧表面保護面板
2a‧‧‧受黏面
2b‧‧‧高度差部
2c‧‧‧辨視開口面
2d‧‧‧表面
2e‧‧‧內周面
3‧‧‧觸控板
3a‧‧‧電極圖案
4‧‧‧影像顯示面板
4‧‧‧高度差部
5‧‧‧表框構件
6‧‧‧缺口部
7‧‧‧電極端子
8‧‧‧凹部
9a~9c‧‧‧離型薄膜
10‧‧‧導件部
11‧‧‧表面保護面板
12‧‧‧觸控板
13‧‧‧黏著片材
14‧‧‧印刷
15‧‧‧辨視開口面
16‧‧‧空隙
圖1係使用本發明一實施形態雙面黏著片材,將表面保護面板與觸控板予以貼合時的一例概略分解立體示意圖。
圖2係使用圖1所示形態雙面黏著片材,將表面保護面板與觸控板予以貼合前的狀態一例剖視圖。
圖3係使用圖1所示形態雙面黏著片材,將表面保護面板與觸控板予以貼合的狀態一例剖視圖。
圖4係在影像顯示面板上安裝表框構件的一例剖視圖。
圖5係在圖1所示形態雙面黏著片材上設置缺口部時的一例立體示意圖。
圖6係使用圖5所示形態雙面黏著片材,在將電極構件收納於缺口部中的情況下,表面保護面板與觸控板之貼合狀態一例剖視圖。
圖7係在圖1所示形態雙面黏著片材中設置凹部時的一例部分放大立體示意圖。
圖8係在圖1所示形態雙面黏著片材的雙面側,積層離型薄膜時的一例剖視圖。
圖9係在圖1所示形態雙面黏著片材的雙面側,積層離型薄膜時的一例剖視圖。
圖10係在圖1所示形態雙面黏著片材的雙面側,積層離型薄膜時的一例剖視圖。
圖11係使用習知黏著片材,將表面保護面板與觸控板予以貼合前的狀態一例剖視圖。
圖12係使用圖11所示形態黏著片材,將表面保護面板與觸控板予以貼合狀態的一例剖視圖。
以下,針對本發明實施形態一例進行說明,惟本發明並不僅侷限於下述實施形態。
本發明一實施形態的影像顯示裝置用雙面黏著片材1,係如圖1~3所示,為將表面保護面板2與觸控板3予以貼合用的俯視矩形狀黏著片材。表面保護面板2係在黏著雙面黏著片材1的受黏面2a上設有高度差部2b。雙面黏著片材1係貼合於受黏面2a上的貼合面1a之面形狀,被賦形成沿受黏面2a的面形狀。
影像顯示裝置係包括有:液晶顯示裝置(LCD)、有機EL顯示裝置(OLED)、以及具備有電漿顯示器(PDP)等的智慧手機、平板電腦、行動電話、電視機、遊戲機、個人電腦、汽車導航、ATM、魚群探測機等。
本實施形態中,雙面黏著片材1係使用於表面保護面板2與觸控板3的貼合,惟並不僅侷限於此,亦可使用於供將從表面保護面板、觸控板、影像顯示面板的影像顯示裝置用構成構件之中選擇任2個受
黏體予以貼合用,特別較佳係使用於將表面保護面板與觸控板、或者將觸控板與影像顯示面板予以貼合。
另外,表面保護面板係可由強化玻璃、丙烯酸樹脂板、聚碳酸酯板等塑膠材料等等形成。又,觸控板係可由玻璃感測器、塑膠薄膜感測器、或者觸控板機能與影像顯示面板呈一體化的外嵌式或內嵌式構件等形成。
表面保護面板2中黏貼雙面黏著片材1的受黏面2a,係如圖1或圖2所示,設有高度差部2b,該高度差部2b係例如對表面保護面板2的背面周緣部施行白色或黑色等印刷,而使受黏面2a的周緣部高出一層突出便可形成。即,表面保護面板2的受黏面2a可形成為在中央附近設有矩形凹狀辨視開口面2c的橫截面凹形狀。高度差部2b的高度並無限定,可形成距辨視開口面2c為1μm以上且100μm以下、較佳係5μm以上且90μm以下。
本實施形態中,高度差部2b係利用印刷形成,但例如圖4所示,在影像顯示面板4的周緣部安裝表框構件5,便可形成高度差部4a。
再者,高度差部2b在本實施形態中係形成單層狀,惟並不僅侷限於此,亦可形成二層狀、三層狀等複數層狀。高度差部2b的表面2d在本實施形態中係形成平面狀,惟並不僅侷限於此,亦可形成例如傾斜狀、彎曲凸狀、彎曲凹狀等形狀。
特別係依照影像顯示裝置,當配置各構件的電極或排線、或者辨視開口面2c在設計上有施行圓隅角加工時,高度差部2b的形狀亦有形成非直線性而是曲線狀。
高度差部2b的內周面2e係可相對於辨視開口面2c形成略垂直狀態,惟並不僅侷限於此。例如相對於辨視開口面2c,可形成0°以上且180°以下、較佳係60°以上且90°以下。內周面2d亦可形成階梯狀、圓弧狀、或彎曲狀等。
雙面黏著片材1係將貼合於表面保護面板2之受黏面2a上的貼合面1a面形狀,沿受黏面2a的面形狀賦形。即,將貼合面1a的中央附近形成略矩形狀隆起高一層的凸部1b,而形成橫截面凸形狀。依此藉由將貼合面1a的面形狀作成與受黏面2a之面形狀緊密合致的形狀,當雙面黏著片材1貼合於表面保護面板2時,便如圖3所示,可使貼合面1a與受黏面2a毫無無間隙地密接狀合致,因而能無空隙地貼合,可防止辨視性惡化、及剝離‧發泡等。
貼合面1a較佳係沿受黏面2a之面形狀賦形為緊密合致的形狀,但因為雙面黏著片材1係具有若干流動性,因而可容許某程度的誤差,例如-5%以上且+5%以下、特佳係-1%以上且+1%以下的誤差。
例如雙面黏著片材1的凸部1b高度係相對於表面保護面板2的高度差部2b,可形成-5%以上且+5%以下、特佳係-1%以上且+1%以下。又,例如雙面黏著片材1的凸部1b橫寬係相對於表面保護面板2的辨視開口面2c橫寬,可形成0.95倍以上且1.05倍以下、較佳係0.99倍以上且1.01倍以下。
再者,雙面黏著片材1的最大厚度係相對於高度差部2b的高度,可形成1.0倍以上且3.0倍以下、較佳係1.1倍以上且2.0倍以下。
再者,雙面黏著片材1係可僅對單面側(表面保護面板2側)施行賦形加工,但當觸控板3的受黏面設有高度差部時,亦可對雙面側均施行賦形加工。
雙面黏著片材1係如圖5或圖6所示,亦可在周緣部設置缺口部6,該缺口部6係用以收納連接於觸控板3上之電極圖案3a的電極端子7。缺口部6係例如在雙面黏著片材1的一緣部中央附近缺損呈矩形狀便可形成。又,如圖7所示,亦可設置使雙面黏著片材1凹陷的凹部8。在凹部8中係可與缺口部6同樣地收納電極端子7。缺口部6與凹部8均係利用湯姆生刀刃進行的切斷、或利用沖壓模框進行的沖壓等便可形成。
雙面黏著片材1的材料係可使用習知公知的黏著片材用材料。例如:1)將(甲基)丙烯酸酯系聚合體(含共聚合體的涵義,以下稱「丙烯酸酯系(共)聚合體」)使用為基質樹脂,在其中摻合入交聯單體、視需要的交聯起始劑與反應觸媒等,使進行交聯反應而形成者;2)將丁二烯或異戊二烯系共聚合體使用為基質樹脂,在其中摻合入交聯單體、視需要的交聯起始劑、反應觸媒等,使進行交聯反應而形成者;3)將聚矽氧系聚合體使用為基質樹脂,在其中摻合入交聯單體、視需要的交聯起始劑、反應觸媒等,使進行交聯反應而形成者;4)將聚胺甲酸乙酯系聚合體使用為基質樹脂的聚胺甲酸乙酯系黏著劑等。
本發明中,黏著片材本身的物性雖不會有本質的問題,但就從黏著性、透明性、及耐候性等觀點,較佳係可使用上述1)的丙烯酸酯系(共)
聚合體。
當要求電氣特性、低折射率等性能的情況,較佳係可使用上述2)的丁二烯或異戊二烯系共聚合體。
當要求耐熱性、廣泛溫度域的橡膠彈性等性能之情況,較佳係可使用上述3)的聚矽氧系共聚合體。
當要求再剝離性等性能的情況,較佳係可使用上述4)的聚胺甲酸乙酯系聚合體。
丙烯酸酯聚合體(包括共聚合體)係可依照為將其進行聚合而使用的丙烯酸單體或甲基丙烯酸單體之種類、組成比率、以及聚合條件等,而適當調整玻璃轉移溫度(Tg)等特性。
為將丙烯酸酯聚合體進行聚合而使用的丙烯酸單體或甲基丙烯酸單體,係可例如:丙烯酸-2-乙基己酯、丙烯酸正辛酯、丙烯酸正丁酯、丙烯酸乙酯、甲基丙烯酸甲酯等。亦可使用使該等與親水基或有機官能基等進行共聚合之諸如:酯酸乙烯酯、丙烯酸羥乙酯、丙烯酸、丙烯酸環氧丙酯、丙烯醯胺、丙烯腈、甲基丙烯腈、氟丙烯酸酯、聚矽氧丙烯酸酯等。
丙烯酸酯聚合體之中,較佳係(甲基)丙烯酸烷基酯系共聚合體。
為形成(甲基)丙烯酸烷基酯系共聚合體而使用的(甲基)丙烯酸酯(即丙烯酸烷基酯或甲基丙烯酸烷基酯)成分,較佳係烷基為正辛基、異辛基、2-乙基己基、正丁基、異丁基、甲基、乙基、異丙基中之任1者的丙烯酸烷基酯或甲基丙烯酸烷基酯中之1種、或由該等中選擇2
種以上的混合物。
其他的成分亦可使具有羧基、羥基、環氧丙基等有機官能基的丙烯酸酯或甲基丙烯酸酯進行共聚合。具體而言,以由上述(甲基)丙烯酸烷基酯成分、與具有機官能基的(甲基)丙烯酸酯成分適當選擇性組合的單體成分為起始原料,施行加熱聚合便可獲得(甲基)丙烯酸酯系共聚合體聚合物。
其中,較佳係可例如:從丙烯酸異辛酯、丙烯酸正辛酯、丙烯酸正丁酯、丙烯酸-2-乙基己酯等丙烯酸烷基酯之1種或從該等中選擇2種以上的混合物,或者由丙烯酸異辛酯、丙烯酸正辛酯、丙烯酸正丁酯、丙烯酸-2-乙基己酯等之中至少1種以上、與丙烯酸進行共聚合者。
此用該等單體進行的聚合處理係可採用例如:溶液聚合、乳化聚合、塊狀聚合、懸浮聚合等公知聚合方法,此時藉由配合聚合方法而使用熱聚合起始劑、光聚合起始劑等聚合起始劑,便可獲得丙烯酸酯共聚合體。
丙烯酸酯聚合體進行交聯時所使用的交聯單體(亦稱「交聯劑」),係可使用例如:具有2個以上(甲基)丙烯醯基的多官能基(甲基)丙烯酸酯;具有諸如異氰酸酯基、環氧基、三聚氰胺基、二醇基、矽氧烷基、胺基等有機官能基達2個以上的多官能基有機官能基樹脂;具有諸如鋅、鋁、鈉、鋯、鈣等之金屬錯合物的有機金屬化合物。
若舉上述多官能基(甲基)丙烯酸酯的例,則可例如:1,4-丁二醇二丙烯酸酯、1,6-己二醇二丙烯酸酯、1,9-壬二醇二丙烯酸酯、三羥甲基丙烷三丙烯酸酯等。
交聯單體的含有量係只要能獲得所需保持力而合併其他因素進行
調整便可,一般相對於基質聚合物100質量份,較佳係在0.01~40.0質量份、更佳係0.1~30.0質量份、尤其係0.5~30.0質量份的比例範圍內進行調整。但,因與其他因素間之均衡,亦可超越此範圍。
再者,丙烯酸酯聚合體進行交聯之際,適當添加交聯起始劑(過氧化起始劑、光起始劑)、反應觸媒(三級胺系化合物、四級銨系化合物、月桂酸錫化合物等)係屬有效。
進行紫外線照射交聯時,較佳係摻合光起始劑。
光起始劑係可使用開裂型光起始劑或脫氫型光起始劑中之任一者,亦可二者併用。
開裂型光起始劑係可例如:苯偶姻丁醚、苄基二甲基縮酮、羥基苯乙酮等。
另一方面,脫氫型光起始劑係可例如:二苯基酮、米蚩酮、二苯并環庚酮、2-乙基蒽醌、異丁基-9-氧硫等。
但,並不僅侷限於上述所舉例的物質。
光起始劑的添加量係只要依上述儲存剪切彈性模數在既定範圍內的方式進行調整便可,一般較佳係相對於基質聚合物100質量份在0.05~5.0質量份的比例範圍內進行調整,最好脫氫型與開裂型各光起始劑依1:1比例併用。但,因與其他因素間之均衡,亦可超越此範圍。
除上述成分之外,視需要尚可適當摻合諸如:具有近紅外線吸收特性的顏料、染料等色素;賦黏劑、抗氧化劑、抗老化劑、吸濕劑、紫外線吸收劑、矽烷偶合劑、天然物或合成物的樹脂類、玻璃纖維或
玻璃珠等各種添加劑。
雙面黏著片材1係可使用單一材料並依單層形成,但亦可形成二層、三層等複數層。
雙面黏著片材1係為使處置較為容易等,可在單面或雙面上積層離型薄膜。離型薄膜係可使用自習知起便已存在的材質,例如可使用PET薄膜等。
離型薄膜較佳係例如依如下述積層於雙面黏著片材1上。
如圖8所示,可在雙面黏著片材1的雙面側,依離型薄膜9a的周緣部較雙面黏著片材1的周緣部更朝外邊伸出的方式積層。藉此,不易直接接觸到雙面黏著片材1,便可輕易地進行貼合作業。只要依至少一面側的離型薄膜9a周緣部,較雙面黏著片材1的周緣部更朝外邊伸出的方式積層便可。
再者,如圖9所示,亦可在雙面黏著片材1的雙面側積層離型薄膜9b,並將一面側的離型薄膜9b沿貼合面1a的表面形狀賦形,使密接狀合致於貼合面1a進行積層。藉此,雙面黏著片材1便容易保形。當對雙面黏著片材的雙面側施行賦形加工時,亦可對雙面側的離型薄膜施行賦形加工。
再者,如圖10所示,亦可在雙面黏著片材1的雙面側積層離型薄膜9c,並依離型薄膜9c的周緣部較雙面黏著片材1的周緣部更朝外邊
伸出的方式積層,且在離型薄膜9c的周緣部其中一部分或全周圍,設置介設於二離型薄膜9c間且可防止對雙面黏著片材1施加應力的導件部10。藉此,便可防止雙面黏著片材1發生變形。
導件部10係藉由將各種薄膜小片設置於既定位置便可形成。例如在製作具有雙面黏著片材1被離型薄膜夾置的構造,並裁斷為既定尺寸的附離型薄膜之雙面黏著片材後,剝離其中任一離型薄膜使雙面黏著片材1的其中一黏著面呈露出狀態,再於較雙面黏著片材1的周緣部更朝外邊伸出的離型薄膜既定位置(例如呈對向的緣部)設置薄膜小片。
其次,藉由使離型薄膜貼合於雙面黏著片材1已露出的黏著面上,便可形成具有導件部10的雙面黏著片材。
此時,薄膜小片的材質並無特別的限定,可例如:聚丙烯、聚乙烯等各種聚烯烴系樹脂;聚乳酸、聚對苯二甲酸乙二酯等各種聚酯系樹脂;6-尼龍、12-尼龍等各種聚醯胺系樹脂等等。其中,就從取得容易度、耐熱性、強度等觀點,較佳係由聚對苯二甲酸乙二酯構成的薄膜。又,導件部10較佳係在單面或雙面上塗佈黏著劑、或能與離型薄膜密接的材料,作成不會從離型薄膜上的任意位置處移動。
再者,導件部10並不僅限定於由單片薄膜構成,亦可為由複數薄膜構成的積層薄膜。此時,所積層的薄膜並不需要全部為相同形狀,亦可使不同形狀的薄膜片重疊,便能賦予各自特定的機能。
再者,導件部10較佳係至少設置於呈對向的緣部。導件部10的高度並無特別的限定,相對於雙面黏著片材1的最大厚度,較佳係0.5
倍以上且2.0倍以下、更佳係1.0倍以上且1.5倍以下。
雙面黏著片材1係例如將黏著片材採行例如:利用沖壓模框進行的賦形、使用模具的賦形、利用輥進行的賦形、利用積層進行的賦形等賦形加工便可製作。
利用沖壓模框進行的賦形係對設有離型薄膜的平面狀黏著片材,越過離型薄膜施行沖壓、或直接對黏著片材施行沖壓,便可製得經賦形加工的雙面黏著片材1。
再者,藉由將離型薄膜利用沖壓模框施行沖壓而施行賦形加工,再於該離型薄膜上塗佈黏著劑組成物或使黏著劑組成物流入等,便可製得經賦形加工的雙面黏著片材1。
使用模具的賦形係藉由使黏著劑組成物流入模框中並固化,便可製得經賦形加工的雙面黏著片材1。
利用輥進行的賦形係藉由使設有離型薄膜的平面狀黏著片材通過輥間,便可製得經賦形加工的雙面黏著片材1。
利用積層進行的賦形係製作大小不同的2個平面狀黏著片材,藉由使該等重疊,便可製得經賦形加工的雙面黏著片材1。
因為雙面黏著片材1係使貼合面1a的面形狀沿受黏面2a的面形
狀賦形,因而即便受黏面2a上存在有因印刷等而造成的高度差部2b,仍可毫無間隙地貼合表面保護面板2、或觸控板3等各影像顯示裝置用構成構件。
以下,針對雙面黏著片材1的製作方法、特別係雙面黏著片材的貼合面之面形狀賦形方法例,進行更具體的說明。
(利用沖壓框進行的賦形方法)
a)越過離型薄膜施行沖壓的方法
將雙面上積層有離型薄膜的平坦黏著片材之原片適當裁切,將經裁切過的黏著片材一邊饋送繞出,一邊使用沿受黏體的表面凹凸形狀(即受黏面2a的面形狀)的沖壓模框,將平坦的黏著片材越過離型薄膜施行熱壓而表面賦形。
下一步驟係剝離一面側的離型薄膜,並將已露出的黏著片材沿賦形形狀外形予以切斷,經將外形外周的不需要黏著耳部予以膠渣去除後,重新貼上較外形切斷尺寸更寬的新離型薄膜。
更於下一步驟切斷為可操作的形狀,便製得雙面黏著片材1。
b)直接對黏著片材施行沖壓的方法
將雙面上積層有離型薄膜的平坦黏著片材之原片適當裁切,將經裁切過的黏著片材一邊饋送繞出,一邊剝離一面側的離型薄膜,並使用沿受黏體表面凹凸形狀(即受黏面2a的面形狀)之沖壓模框,直接對平坦的黏著片材施行熱壓而表面賦形。
下一步驟將已露出一面側的黏著片材沿賦形形狀的外形予以切
斷,經將外形外周的不需要黏著耳部予以膠渣去除後,重新貼上較外形切斷尺寸更寬的新離型薄膜。
更於下一步驟個片切斷為可操作的形狀,便製得雙面黏著片材1。
沖壓模框的材質並無特別的限定,亦可利用離型性優異的聚矽氧樹脂、氟系樹脂。又,即便不鏽鋼、鋁等無具離型性的材質,但藉由塗佈各種離型劑便亦可適於使用。
熱壓的溫度係例如室溫以上、較佳係80℃以上、更佳係100℃以上。又,沖壓壓力、沖壓深度、沖壓時間係只要依照尺寸、形狀、賦形狀態等,再行適當調整便可。
再者,切斷方法係可例如利用湯姆生刀刃、旋轉刀進行的切斷方法。
再者,表面賦形與外形切斷亦可依如上述利用個別製程施行的方法,但若使用例如由賦形用模具與切斷模具呈一體化的模具,便可利用單一步驟便施行表面賦形與外形切斷。
(利用經賦形加工過的離型薄膜施行之方法)
將預先沿受黏體之表面凹凸形狀(即受黏面2a的面形狀)賦形的離型薄膜,至少配置於一面側,塗佈黏著劑而製得經表面賦形的黏著片材原片。
其次,與原片的表面凹凸形狀寬度一致地進行適當裁切後,再將經裁切的黏著片材於下一步驟中剝離一面側的離型薄膜,並將所露出的黏著片材面沿外形予以切斷,經將外形外周不需要黏著耳部予以膠
渣去除後,重新貼上較外形切斷尺寸更寬的新離型薄膜。
更於下一步驟個片切斷為可操作的形狀,便製得雙面黏著片材1。
(使用模具的賦形方法)
在以受黏體之表面凹凸形狀(即受黏面2a之面形狀)為模型的模具中塗佈或注入黏著劑,而成形為經表面賦形的黏著片材。
當模具僅有單面的情況,便在塗佈或注入黏著劑之後,再於對向側上黏貼離型薄膜,從其上面利用橡膠輥等而使密接。
經使黏著劑固化後,藉由拉取離型薄膜,便將雙面黏著片材1從模具上撕離。
將在塗佈或注入於模具時發生的滲出予以除去,視需要設置導件部10,再於露出的黏著片材上貼合離型薄膜。
更於下一步驟個片切斷為可操作的形狀,便製得雙面黏著片材1。
當模具係雙面的情況,於使黏著劑固化後,卸除單邊的模具,取而代之貼合離型薄膜,從其上面利用橡膠輥等而使密接。
然後,藉由拉取離型薄膜,便將黏著片材從模具上撕離。
將在塗佈或注入於模具時發生的滲出予以除去,視需要設置導件部10,再於露出的黏著片材上貼合離型薄膜。
更於下一步驟個片切斷為可操作的形狀,便製得雙面黏著片材1。
模具的材質並無特別的限定,亦可利用離型性優異的聚矽氧樹脂、氟系樹脂。又,即便不鏽鋼、鋁等無具離型性的材質的模具,但藉由塗佈各種離型劑便亦可適於使用。
(利用輥進行的賦形方法)
在平坦的離型薄膜2片間塗佈黏著劑後,於至少一面側上設置以受黏體表面凹凸形狀(即受黏面2a之面形狀)為模型之賦形輥,夾置於與另一面側的輥之間並使其通過而施行表面賦形,便製得黏著片材的原片。
其次,與原片的表面凹凸形狀寬度一致地適當裁切後,再將所裁切的黏著片材於下一步驟中剝離一面側的離型薄膜,將已露出的黏著片材沿賦形形狀的外形予以切斷,經將外形外周的不需要黏著耳部予以膠渣去除後,重新貼上較外形切斷尺寸更寬的新離型薄膜。
更於下一步驟個片切斷為可操作的形狀,便製得雙面黏著片材1。
配置賦形輥並夾置於另一面側的輥之間並使其通過而施行表面賦形時的溫度,係室溫以上、較佳係80℃以上、更佳係100℃以上。
(利用積層進行的賦形)
將雙面上積層著離型薄膜的平坦黏著片材之原片適當裁切,分別製作預先切斷為辨視開口面2c形狀的平坦第1黏著片材、與切斷為高度差部2b之表面2d形狀大小且不同形狀的平坦第2黏著片材。
然後,分別剝離各自一面側的離型薄膜,使所露出的黏著面彼此間重疊黏貼,便製得具有所需表面賦形的雙面黏著片材1。
1‧‧‧影像裝置用雙面黏著片材
2‧‧‧表面保護面板
2b‧‧‧高度差部
3‧‧‧觸控板
Claims (16)
- 一種影像顯示裝置用雙面黏著片材,係用以將從表面保護面板、觸控板及影像顯示面板之中選擇任二個受黏體,予以貼合之雙面黏著片材;其特徵在於,至少其中一受黏體係在黏著雙面黏著片材的受黏面上設有高度差部;雙面黏著片材係將黏著於上述受黏面上的貼合面之面形狀,沿上述受黏面的略相同面形狀施行賦形。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,上述受黏面係具有周緣部突出的高度差部。
- 如申請專利範圍第1或2項之影像顯示裝置用雙面黏著片材,其中,在周緣部設有收納電極端子的缺口部或凹部。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,上述受黏面係具有利用保持影像顯示面板的表框構件所形成之高度差部。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,最大厚度係上述高度差部的高度之1.0倍以上且3.0倍以下。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,積層有離型薄膜的黏著片材,係利用越過離型薄膜的沖壓模框施行沖壓而賦形。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,黏著片材係利用沖壓模框施行沖壓而賦形。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,藉由在經利用沖壓模框施行沖壓而賦形加工過的離型薄膜上,塗佈黏著劑而賦形。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,藉由使黏著劑流入於模具中並使其固化而賦形。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,藉由使雙面上已積層著離型薄膜的黏著片材,通過輥間而賦形。
- 如申請專利範圍第1項之影像顯示裝置用雙面黏著片材,其中,藉由使2個黏著片材重疊而賦形。
- 一種附有離型薄膜之影像顯示裝置用雙面黏著片材,係在申請專利範圍第1至11項中任一項之影像顯示裝置用雙面黏著片材的雙面側積層離型薄膜,且依至少一面側的離型薄膜周緣部較雙面黏著片材的周緣部更朝外邊伸出狀態進行積層。
- 一種附有離型薄膜之影像顯示裝置用雙面黏著片材,係在申請專利範圍第1至11項中任一項之影像顯示裝置用雙面黏著片材的雙面側積層離型薄膜,且至少一面側的離型薄膜係沿上述貼合面的表面形狀賦形。
- 一種附有離型薄膜之影像顯示裝置用雙面黏著片材,係在申請專利範圍第1至11項中任一項之影像顯示裝置用雙面黏著片材的雙面側積層離型薄膜;該離型薄膜係依周緣部較雙面黏著片材的周緣部更朝外邊伸出的狀態進行積層,且該離型薄膜周緣部其中一部分或全部周圍設有介設於二離型薄膜間且防止對雙面黏著片材施加應力的導件部。
- 一種影像顯示裝置,係使用申請專利範圍第1至11項中任一項之影像顯示裝置用雙面黏著片材。
- 一種影像顯示裝置用雙面黏著片材之貼合方法,係申請專利範圍第1至11項中任一項之影像顯示裝置用雙面黏著片材的貼合方法。
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