TW202224931A - 多層結構體 - Google Patents
多層結構體 Download PDFInfo
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- TW202224931A TW202224931A TW110141014A TW110141014A TW202224931A TW 202224931 A TW202224931 A TW 202224931A TW 110141014 A TW110141014 A TW 110141014A TW 110141014 A TW110141014 A TW 110141014A TW 202224931 A TW202224931 A TW 202224931A
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Images
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Abstract
本多層結構體具有支持體、在上述支持體上藉由黏著劑層而層疊的樹脂層以及上述樹脂層上所層疊的玻璃層，上述玻璃層的厚度為10μm以上300μm以下，在將上述支持體的線膨脹係數設為CTE［ppm/℃］，將上述黏著劑層的厚度設為d［μm］，將上述黏著劑層的彈性模量設為E［GPa］，設為a＝CTE/(d/E)時，a的值為3以下。
Description
發明領域
本發明系關於多層結構體。
發明背景
已知使2層以上的層層疊的多層結構體。作為一例，可舉出在板厚薄的玻璃層(玻璃膜)上層疊有銀反射層的多層結構體。該多層結構體的厚度在例如，10～200μm的範圍内。該多層結構體例如，由藉由向下拉引法而成型的玻璃輥來獲得。
先實施技術文獻
專利文獻
專利文獻1:日本特開2013-231744號公報
發明概要
＜發明欲解決之問題＞
上述那樣的板厚薄的玻璃層非常地脆，因此易於產生裂縫，此外操作性差，由此例如，提出了在玻璃層的單側黏貼樹脂層等以增強，提高了操作性的多層結構體。
然而，多層結構體在高溫環境下、高溫高濕環境下重複使用的情況下，有時玻璃層產生裂縫。
本發明是鑑於上述點而提出的，其目的在於提供玻璃層不易產生裂縫的多層結構體。
＜用於解決課題的方法＞
本多層結構體具有支持體、在上述支持體上藉由黏著劑層而層疊的樹脂層以及上述樹脂層上所層疊的玻璃層，上述玻璃層的厚度為10μm以上300μm以下，在將上述支持體的線膨脹係數設為CTE［ppm/℃］，將上述黏著劑層的厚度設為d［μm］，將上述黏著劑層的彈性模量設為E［GPa］，設為a＝CTE/(d/E)時，a的值為3以下。
＜發明之功效＞
根據公開的技術，能夠提供玻璃層不易產生裂縫的多層結構體。
較佳實施例之詳細說明
以下，參照附圖對於具體實施方式進行說明。各附圖中，同一構成部分附上同一符號，有時省略重複的說明。
圖1為例示本實施方式涉及的多層結構體的斷面圖。如圖1所顯示那樣，多層結構體1具有支持體10、黏著劑層20、樹脂層30、金屬層40、接着劑層50以及玻璃層60。黏著劑層20、樹脂層30、金屬層40、接著劑層50和玻璃層60依次層疊於支持體10的上面10a。
多層結構體1的平面形狀(從支持體10的上面10a的法線方向觀察的形狀)為例如，矩形狀。然而，並不限定於此，多層結構體1的平面形狀能夠為圓形狀、橢圓形狀、它們的複合、其它適當的形狀。
多層結構體1例如，能夠作為鏡來使用。多層結構體1中，玻璃層60的厚度為10μm以上300μm以下。多層結構體1中，玻璃層60的厚度薄，玻璃層60的表面與金屬層40的距離極其近。因此，多層結構體1中，能夠解決像雙重地顯現的以往的板玻璃的課題而顯現出清晰的像。
這裡，對於多層結構體1的各部分材料等進行說明。
［支持體］
支持體10支持樹脂層30、玻璃層60。支持體10的厚度能夠為例如，1mm以上5mm以下左右。支持體10的線膨脹係數優選為100ppm/℃以下。作為支持體10的材料，可舉出例如，樹脂、玻璃、金屬等。支持體10優選線膨脹係數小，在這一點上，作為支持體10的材料，優選使用玻璃、金屬。
另一方面，在提高多層結構體1的操作性這一點上，優選將支持體10由重量輕的材料形成。在該情況下，支持體10的每單位面積的重量優選為8kg/m
2以下。在該情況下，能夠將支持體10由樹脂材料形成，優選選定線膨脹係數小的樹脂材料。作為線膨脹係數小的樹脂材料，可舉出例如，利用熔融成膜沒有拉伸的製法而製作的低收縮的丙烯酸系樹脂、利用拉伸製法而製作的低收縮的聚碳酸酯系樹脂等。
［黏著劑層］
黏著劑層20設置於支持體10與樹脂層30之間。作為黏著劑層20，使用任意的適當的黏著劑。作為黏著劑層20的材料，可舉出例如，丙烯酸系黏著劑、有機矽系黏著劑、橡膠系黏著劑等。黏著劑層20的厚度沒有特別限定，例如，為5μm以上500μm以下左右。
［樹脂層］
樹脂層30在支持體10上藉由黏著劑層20而層疊。樹脂層30由1層或複數個層來構成。在樹脂層30由複數個層形成的情況下，優選介在具有接著功能的密著層進行層疊。樹脂層30的總厚度從撓性的觀點考慮，只要為20μm以上1000μm以下即可，優選為25μm以上500μm以下，更優選為50μm以上200μm以下的範圍。在樹脂層30由1層構成的情況下，樹脂層30的厚度能夠為例如，20μm以上150μm以下的範圍。
作為樹脂層30的材料，可舉出例如，聚對苯二甲酸乙二醇酯系樹脂、聚萘二甲酸乙二醇酯系樹脂等聚酯系樹脂、降冰片烯系樹脂等環烯烴系樹脂、聚醚碸系樹脂、聚碳酸酯系樹脂、丙烯酸系樹脂、聚烯烴系樹脂、聚醯亞胺系樹脂、聚醯胺系樹脂、聚醯亞胺醯胺系樹脂、聚芳酯系樹脂、聚碸系樹脂、聚醚醯亞胺系樹脂、纖維素系樹脂、氨基甲酸酯系樹脂等。
［金屬層］
金屬層40層疊於樹脂層30上。金屬層40為隔著玻璃層60和接著劑層50將入射的可見光進行反射的層。作為金屬層40的材料，優選可見光反射率高的材料，可舉出例如，鋁、銀、銀合金等。金屬層40的厚度沒有特別限定，例如，為10nm以上500nm以下左右。金屬層40能夠在樹脂層30的上面，例如，藉由濺射法、蒸鍍法、鍍覆法等而形成。
另外，金屬層40可以形成於玻璃層60的下面。在該情況下，黏著劑層20、樹脂層30、接著劑層50、金屬層40和玻璃層60依次層疊於支持體10的上面10a。金屬層40能夠在玻璃層60的下面，例如，藉由濺射法、蒸鍍法、鍍覆法等而形成。
然而，只要在需要金屬層40的情況下設置即可。在多層結構體1不具有金屬層40的情況下，例如，能夠作為保有玻璃的質感、硬度的輕量的玻璃板而使用。
［接著劑層］
作為接著劑層50，由可見光透射率高的材料形成。接著劑層50的厚度為例如，0.1μm以上25μm以下。作為接著劑層50，能夠利用例如，丙烯酸系黏著劑、有機矽系黏著劑、橡膠系黏著劑、紫外線固化性丙烯酸系接著劑、紫外線固化性環氧系接著劑、熱固性環氧系接著劑、熱固性三聚氰胺系接著劑、熱固性苯酚系接著劑、乙烯乙酸乙烯酯(EVA)中間膜、聚乙烯醇縮丁醛(PVB)中間膜等。
另外，在本說明書中，所謂黏著劑，為在常溫下具有接著性，以輕的壓力接著於被著體的層。因此，即使在剝離貼著於黏著劑的被著體的情況下，黏著劑也保持實用上的黏著力。另一方面，所謂接著劑，為藉由介於物質之間而能夠結合物質的層。因此，在剝離貼著於接著劑的被著體的情況下，接著劑不具有實用上的接著力。
［玻璃層］
玻璃層60藉由接著劑層50而層疊於金屬層40上。玻璃層60沒有特別限定，能夠根據目的採用適當的物質。玻璃層60根據利用組成的分類，可舉出例如，鈉鈣玻璃、硼酸玻璃、矽酸鋁玻璃、石英玻璃等。另外，根據利用鹼成分的分類，可舉出無鹼玻璃、低鹼玻璃。上述玻璃的鹼金屬成分(例如，Na
2O、K
2O、Li
2O)的含量優選為15重量%以下，進一步優選為10重量%以下。
玻璃層60的厚度如果考慮玻璃所具有的表面硬度、氣密性、耐腐蝕性，則優選為10μm以上。另外，由於期望玻璃層60具有膜那樣的撓性，因此玻璃層60的厚度優選為300μm以下。玻璃層60的厚度進一步優選為20μm以上200μm以下，特別優選為30μm以上150μm以下。
玻璃層60的波長550nm時的光透射率優選為85%以上。玻璃層60的波長550nm時的折射率優選為1.4～1.65。玻璃層60的密度優選為2.3g/cm
3～3.0g/cm
3，進一步優選為2.3g/cm
3～2.7g/cm
3。
玻璃層60的成型方法沒有特別限定，能夠根據目的採用適當的物質。代表性地，玻璃層60能夠將包含二氧化矽、氧化鋁等主原料、芒硝、氧化銻等消泡劑以及碳等還原劑的混合物在1400℃～1600℃左右的溫度進行熔融，成型為薄板狀之後，冷却並製作。作為玻璃層60的成型方法，可舉出例如，流孔下拉法、熔合法、浮漂法等。藉由這些方法而成型為板狀的玻璃層為了薄板化，或提高平滑性，可以根據需要利用氫氟酸等溶劑進行化學地研磨。
另外，可以在玻璃層60的上面(沒有形成接著劑層50一側的面)設置防污層、防反射層、導電層、反射層、裝飾層等功能層。
［多層結構體的操作性和玻璃層的裂縫］
如果玻璃層60薄，則操作性差，因此玻璃層60易於產生裂縫。因此，多層結構體1中，藉由在最下層設置支持體10，從而提高操作性。
作為支持體10，可以使用玻璃，但是由於玻璃重，因此多層結構體1的總體的重量增加而操作性惡化。因此，在重視操作性的情況下，優選將支持體10由樹脂材料形成。
然而，在支持體10使用樹脂材料的情況下，如果將多層結構體1在高溫環境(例如，80℃)或高溫高濕環境(例如，60℃95%)下使用，則樹脂材料產生熱膨脹。因此，如果任何對策都沒有實施，則在將多層結構體1在高溫環境或高溫高濕環境下重複使用的情況下，有時由於樹脂材料的熱膨脹而玻璃層60產生局部的變形，玻璃層60帶入裂縫。
因此，多層結構體1中，實施了即使在支持體10使用樹脂材料的情況下，玻璃層60也不產生裂縫那樣的對策。關於此，以下進行說明。另外，樹脂層30藉由接著劑層50與玻璃層60接著，因此顯示與玻璃層60幾乎同樣的挙動。因此，關於玻璃層60的裂縫，樹脂層30的熱膨脹能夠無視。
發明人等認為利用黏著劑層20吸收支持體10的熱膨脹，緩和對於玻璃層60的影響，反復進行研究，結果發現圖2那樣的關係。圖2為表示黏著劑層20的厚度d［μm］/彈性模量E［GPa］與支持體10的線膨脹係數CTE［ppm/℃］的關係的圖。
圖2中，横軸的厚度d［μm］/彈性模量E［GPa］越沿箭頭方向(右方向)行進，則黏著劑層20越易於追隨支持體10的熱膨脹。此外，縱軸的線膨脹係數CTE［ppm/℃］越沿箭頭方向(上方向)行進，則支持體10越易於由於熱膨脹而變形。
圖2的斜線表示a＝CTE［ppm/℃］/(厚度d［μm］/彈性模量E［GPa］)。與圖2的斜線相比靠下側的區域(1)和(2)中，玻璃層60沒有產生裂縫。與此相對，在與圖2的斜線相比靠上側的區域(3)中，玻璃層60產生裂縫。
即，如果支持體10的CTE［ppm/℃］小，則黏著劑層20的厚度d［μm］/彈性模量E［GPa］即使小，玻璃層60也沒有產生裂縫。即使在支持體10的CTE［ppm/℃］大的情況下，藉由增大黏著劑層20的厚度d［μm］/彈性模量E［GPa］，從而支持體10的熱膨脹被緩和，因此玻璃層60沒有產生裂縫。
區域(1)例如，為在支持體10使用玻璃的情況下獲得的特性。此外，區域(2)例如，為在支持體10使用樹脂材料的情況下獲得的特性。即，在支持體10使用玻璃的情況下，無論黏著劑層20的厚度d［μm］/彈性模量E［GPa］的大小，玻璃層60都不產生裂縫。與此相對，在支持體10使用樹脂材料的情況下，考慮樹脂材料的線膨脹係數，以成為與圖2的斜線相比靠下側的方式，調整黏著劑層20的厚度d［μm］/彈性模量E［GPa］，從而能夠抑制玻璃層60的裂縫。
根據發明人等的研究，如果a＝CTE［ppm/℃］/(厚度d［μm］/彈性模量E［GPa］)為3以下，則能夠抑制由支持體10的熱膨脹引起的玻璃層60的裂縫。在支持體10使用玻璃的情況下a的值為0.3左右，在支持體10使用樹脂材料的情況下，a的值為1以上。
因此，在能夠一定程度容許多層結構體1的重量的情況下，優選以使a的值為0.2以上3以下的方式，選定支持體10、黏著劑層20。另一方面，為了減輕多層結構體1的重量，支持體10需要使用樹脂材料，在該情況下，優選以使a的值成為1以上3以下的方式，選定支持體10、黏著劑層20。即使在任一情況下，如果a≦3，則能夠抑制玻璃層60的裂縫。
此外，從確實地抑制玻璃層60的裂縫的觀點考慮，支持體10的線膨脹係數優選為5［ppm/℃］≦CTE≦100［ppm/℃］。此外，黏著劑層20的厚度優選為d≧50［μm］，優選為d≧100［μm］，進一步優選為d≧150［μm］。
［實施例1］
實施例1中，製作圖1所顯示的結構的多層結構體，研究操作性和玻璃層的裂縫產生。由實施例1製作的多層結構體中，玻璃層的材料使用日本電氣硝子社製OA-10G，厚度為約100μm。黏著劑層的材料使用丙烯酸系樹脂，厚度為約100μm，彈性模量為約3［GPa］。支持體的材料使用丙烯酸系樹脂，線膨脹係數為70ppm/℃。在該情況下，a=2.1［GPa・ppm/℃・μm］。
［實施例2］
實施例2中，製作圖1所顯示的結構的多層結構體，研究操作性和玻璃層的裂縫產生。由實施例2製作的多層結構體中，玻璃層的材料使用日本電氣硝子社製OA-10G，厚度為約100μm。黏著劑層的材料使用丙烯酸系樹脂，厚度為約100μm，彈性模量為約3［GPa］。支持體的材料使用板玻璃，線膨脹係數為9ppm/℃。在該情況下，a=0.3［GPa・ppm/℃・μm］。
［實施例3］
實施例3中，製作圖1所顯示的結構的多層結構體，研究操作性和玻璃層的裂縫產生。由實施例3製作的多層結構體中，玻璃層的材料使用日本電氣硝子社製OA-10G，厚度為約100μm。黏著劑層的材料使用丙烯酸系樹脂，厚度為約150μm，彈性模量為約3［GPa］。支持體的材料使用丙烯酸系樹脂，線膨脹係數為70ppm/℃。在該情況下，a=1.4［GPa・ppm/℃・μm］。
［比較例1］
比較例1中，製作圖1所顯示的結構的多層結構體，研究操作性和玻璃層的裂縫產生。由比較例1製作的多層結構體中，玻璃層的材料使用日本電氣硝子社製OA-10G，厚度為約100μm。黏著劑層的材料使用丙烯酸系樹脂，厚度為約30μm，彈性模量為約3［GPa］。支持體的材料使用丙烯酸系樹脂，線膨脹係數為70ppm/℃。在該情況下，a=7.0［GPa・ppm/℃・μm］。
將實施例1～3和比較例1的條件和結果歸納於圖3。另外，關於玻璃層的裂縫產生，對於實施例1～3和比較例1的任一例，將多層結構體於溫度60℃濕度95%的環境放置12小時之後進行了確認。
由圖3能夠確認，如果為a≦3，則玻璃層沒有產生裂縫。此外，在要進一步提高操作性的情況下，可以說支持體優選使用樹脂材料。
以上，對於優選的實施方式等進行了詳細地說明，但並不限定於上述實施方式等，能夠不脫離請求項所記載的範圍，對於上述實施方式等施加各種變形和置換。
本國際申請主張基於2020年11月27日申請的日本專利申請2020-196632號的優先權，將日本專利申請2020-196632號的全部内容援用至本國際申請中。
1:多層結構體
10:支持體
10a:上面
20:黏著劑層
30:樹脂層
40:金屬層
50:接著劑層
60:玻璃層
圖1為例示本實施方式涉及的多層結構體的斷面圖。
圖2為表示黏著劑層的厚度/彈性模量與支持體的線膨脹係數的關係的圖。
圖3為表示實施例和比較例的條件和結果的圖。
Claims (8)
- 一種多層結構體，其具有: 支持體、 在該支持體上藉由黏著劑層而層疊的樹脂層、以及 在該樹脂層上所層疊的玻璃層， 該玻璃層的厚度為10μm以上300μm以下， 在將該支持體的線膨脹係數設為CTE［ppm/℃］，將該黏著劑層的厚度設為d［μm］，將該黏著劑層的彈性模量設為E［GPa］，設為a＝CTE/(d/E)時，a的值為3以下。
- 如請求項1之多層結構體，其中， 該CTE為100ppm/℃以下。
- 如請求項1或2之多層結構體，其中， 該d為50μm以上。
- 如請求項1至3中任一項之多層結構體，其中， 該支持體的每單位面積的重量為8kg/m 2以下。
- 如請求項4之多層結構體，其中， 該a的值為1以上。
- 如請求項5之多層結構體，其中， 該支持體由樹脂材料形成。
- 如請求項6所述的多層結構體，其中， 該樹脂材料為丙烯酸系樹脂或聚碳酸酯系樹脂。
- 如請求項1至7中任一項之多層結構體， 其具有層疊於該樹脂層與該玻璃層之間的金屬層。
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| JP2013231744A (ja) | 2010-08-20 | 2013-11-14 | Konica Minolta Advanced Layers Inc | フィルムミラーと、その製造方法、それを用いた太陽光反射用ミラー |
| JP2015101044A (ja) * | 2013-11-27 | 2015-06-04 | 日本電気硝子株式会社 | 化学強化ガラス樹脂積層体及びその製造方法 |
| JP6645021B2 (ja) | 2014-10-24 | 2020-02-12 | セイコーエプソン株式会社 | 媒体搬送ユニット、記録装置 |
| JP6613870B2 (ja) * | 2015-07-17 | 2019-12-04 | 三菱ケミカル株式会社 | ガラス積層体、及び表示装置用保護材 |
| CN107924003B (zh) * | 2016-02-01 | 2020-08-25 | Ａｇｃ株式会社 | 透光性结构体 |
| CN110494282B (zh) * | 2017-04-11 | 2022-02-22 | 富士胶片株式会社 | 光学层叠体及具有光学层叠体的图像显示装置的前面板、图像显示装置、电阻膜式触摸面板及静电电容式触摸面板 |
| US11760077B2 (en) * | 2017-10-30 | 2023-09-19 | Nitto Denko Corporation | Laminate for image display devices |
| WO2020013012A1 (ja) * | 2018-07-09 | 2020-01-16 | 日本板硝子株式会社 | 画像表示装置に適したガラス板 |
-
2020
- 2020-11-27 JP JP2020196632A patent/JP2022085125A/ja not_active Withdrawn
-
2021
- 2021-10-29 US US18/038,070 patent/US20240001651A1/en active Pending
- 2021-10-29 WO PCT/JP2021/040086 patent/WO2022113652A1/ja active Application Filing
- 2021-10-29 CN CN202180078789.0A patent/CN116568500A/zh active Pending
- 2021-10-29 EP EP21897628.0A patent/EP4253042A4/en active Pending
- 2021-10-29 KR KR1020237019566A patent/KR20230111608A/ko unknown
- 2021-11-03 TW TW110141014A patent/TW202224931A/zh unknown
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|---|---|
| EP4253042A1 (en) | 2023-10-04 |
| US20240001651A1 (en) | 2024-01-04 |
| EP4253042A4 (en) | 2024-05-22 |
| JP2022085125A (ja) | 2022-06-08 |
| KR20230111608A (ko) | 2023-07-25 |
| CN116568500A (zh) | 2023-08-08 |
| WO2022113652A1 (ja) | 2022-06-02 |
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