TW202202340A - 多層結構體 - Google Patents
多層結構體 Download PDFInfo
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- TW202202340A TW202202340A TW110109394A TW110109394A TW202202340A TW 202202340 A TW202202340 A TW 202202340A TW 110109394 A TW110109394 A TW 110109394A TW 110109394 A TW110109394 A TW 110109394A TW 202202340 A TW202202340 A TW 202202340A
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Abstract
本多層結構體具有樹脂層,以及在上述樹脂層上經由黏接劑層而被層疊的玻璃層,上述玻璃層的厚度為10μm以上300μm以下,上述樹脂層與上述黏接劑層的界面的算術平均波紋度Wa為10μm以下。
Description
本發明係關於多層結構體。
已知使2層以上的層層疊而成的多層結構體。作為一例,可舉出在薄的玻璃層(玻璃膜)上層疊有銀反射層的多層結構體。這樣的多層結構體兼具表面硬度、尺寸穩定性、化學耐性和輕量、撓性。因此,如果有效地利用這樣的多層結構體,則能夠消除作為以往的板玻璃的課題的、由重量、開裂帶來的危險,具有在各種用途中的置換的可能性。
[先前技術文獻]
[專利文獻]
專利文獻1:日本特開2013-231744號公報
[發明欲解決之問題]
可是,也考慮了在樹脂層上經由黏接劑層而層疊有上述那樣的薄的玻璃層的多層結構體。在這樣的多層結構體中,經由玻璃層能夠看見下層側,但是有時下層側的可見性降低。可見性的降低導致例如,將多層結構體用於鏡面精加工的情況下、用於裝飾板的情況下等的品質降低。
本發明是鑑於上述方面而提出的,其目的在於提供能夠提高經由玻璃層的可見性的多層結構體。
[用於解決課題的方案]
本多層結構體具有樹脂層,以及在上述樹脂層上經由黏接劑層而被層疊的玻璃層,上述玻璃層的厚度為10μm以上300μm以下,上述樹脂層與上述黏接劑層的界面的算術平均波紋度Wa為10μm以下。
[發明之功效]
根據公開的技術,能夠提供能夠提高經由玻璃層的可見性的多層結構體。
以下,參照附圖對於實施方式進行說明。在各附圖中,同一構成部分附上同一符號,有時省略重複的說明。
〈第1實施方式〉
[多層結構體]
圖1為例示第1實施方式涉及的多層結構體的截面圖。如圖1所示那樣,多層結構體10具有樹脂層11、黏接劑層12、玻璃層13以及黏接劑層14。在多層結構體10中,玻璃層13在樹脂層11上經由黏接劑層12而被層疊。另外,在與樹脂層11的層疊有黏接劑層12一側的相反側的面上,形成有黏接劑層14。
但是,黏接劑層14只要根據需要設置即可。例如,可以將在樹脂層11上經由黏接劑層12而被層疊的玻璃層13剛要黏貼於被黏物之前,在樹脂層11的下表面黏貼雙面膠帶等,可以在被黏物側黏貼雙面膠帶等。
另外,多層結構體10的平面形狀(從玻璃層13的上表面的法線方向看到的形狀)能夠成為矩形、圓形、橢圓形、它們的組合、其它的適當的形狀。多層結構體10具有撓性,因此曲面上也能夠容易進行黏貼。
發明人等反復深入研究,查明在經由玻璃層13看見下層側的情況下,如果下層的平面性差,則可見性降低,而且樹脂層11與黏接劑層12的界面的平面性最大地有助於可見性的降低。
這裡,所謂平面性,為從基準長度中的平均面的平均的高低差(即,波紋度),例如,以算術平均波紋度Wa來表示。在本申請中,算術平均波紋度Wa為按照JIS-B-0601(2013),以基準長度10cm測定得到的值。
樹脂層11與黏接劑層12的界面的算術平均波紋度Wa,即,樹脂層11的與黏接劑層12相接的面的算術平均波紋度Wa為10μm以下。樹脂層11與黏接劑層12的界面的算術平均波紋度Wa更優選為5μm以下。樹脂層11與黏接劑層12的界面的算術平均波紋度Wa的下限值可以為0μm,但通常為大於0μm的值(例如,數μm)。
此時,這裡所說的算術平均波紋度Wa不含缺點等局部的鼓起。
如果樹脂層11與黏接劑層12的界面的算術平均波紋度Wa在上述值的範圍內,則樹脂層11的與黏接劑層12相接的面的平面性提高,因此能夠提高經由玻璃層13而能夠看見下層側的情況下的可見性。其結果是例如,在將多層結構體10用於鏡面精加工的情況下、用於透明的保護膜、裝飾板等的情況下的品質提高(質感的提高)成為可能。
另外,黏接劑層12追隨樹脂層11的形狀,因此黏接劑層12的與樹脂層11相接的面的算術平均波紋度Wa與樹脂層11的與黏接劑層12相接的面的算術平均波紋度Wa相等。
藉由調整樹脂層11的成型時的成型條件、成型後研磨樹脂層的表面等,從而能夠使樹脂層11與黏接劑層12的界面的算術平均波紋度Wa處於上述範圍內。或者,可以獲得市售的樹脂膜,測定算術平均波紋度Wa,選定算術平均波紋度Wa落入上述範圍內的樹脂膜。
這裡,對於多層結構體10的各部的材料等進行說明。
[樹脂層]
樹脂層11為作為層疊玻璃層13等的基材的層,具有撓性。樹脂層11由一層或多層構成。在樹脂層11由多層構成的情況下,優選經由具有黏接功能的密合層使其層疊。從撓性的觀點考慮,樹脂層11的總厚度只要為20μm以上1000μm以下即可,優選為25μm以上500μm以下,更優選為25μm以上300μm以下的範圍。
從波紋度的觀點考慮,樹脂層11的彈性模量優選為1GPa以上,優選為10GPa以下。
作為樹脂層11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、氨基甲酸酯系樹脂等。
例如,在要使樹脂層11保持衝擊吸收性的情況下,作為樹脂層11的材料,優選使用氨基甲酸酯系樹脂。另外,在要使樹脂層11保持硬度的情況下,作為樹脂層11的材料,優選使用聚對苯二甲酸乙二醇酯系樹脂。
樹脂層11可以為透明的。例如,在將樹脂層11和黏接劑層12由相對於可見光透明的材料所形成的情況下,能夠將多層結構體10用作用於保護車輛的窗玻璃不受飛石等的影響的保護膜。作為這樣的用途,還考慮了使用表面為樹脂的保護膜,但在表面為樹脂的情況下,保護性能低,另外,有時由於排氣氣體等的影響而表面的樹脂發生變色。
另一方面,多層結構體10的表面為玻璃層13,因此與表面為樹脂的保護膜相比,表面難以受到損傷,能夠發揮高的保護性能。另外,多層結構體10的表面為玻璃層13,因此耐久性、耐化學性高,能夠降低位於下層的樹脂層11發生變色等劣化的擔憂。
樹脂層11可以為賦予了設計性的不透明的裝飾層。裝飾層可以為具有單色的顏色的層,可以為賦予了任意的模樣、圖形、文字等的層。
例如,藉由使樹脂層11為黑色的裝飾層,從而能夠利用多層結構體10實現相當於鋼琴烤漆加工(piano finishing)(有時被稱為鋼琴烤漆塗裝、鋼琴烤漆黑等)的鏡面精加工。
以往的鋼琴烤漆加工採用在樹脂層等基材上多層層疊氨基甲酸酯系樹脂的方法,經由特別複雜的工序來形成。另外,由該方法獲得的鋼琴烤漆加工由於表面為樹脂,因此易於受到損傷,並且耐久性、耐化學性差。
另一方面,在使用將樹脂層11作為黑色的裝飾層的多層結構體10的情況下,僅將多層結構體10黏貼於被黏物,就不經由複雜的工序,而能夠容易地實現相當於鋼琴烤漆加工的鏡面精加工。另外,多層結構體10由於表面為玻璃層13,因此與表面為樹脂的以往的鋼琴烤漆加工相比,表面難以受到損傷,並且耐久性、耐化學性提高。
黑色的裝飾層例如,能夠藉由使樹脂含有黑色系著色劑來實現。或者,可以在樹脂中組合並含有氰系著色劑、品紅系著色劑、和黃色系著色劑、進一步根據需要的黑色系著色劑。
這裡,所謂黑色,基本上是指,L*a*b*表色系所規定的L*為35以下(0~35)[優選為30以下(0~30),進一步優選為25以下(0~25)]的黑色系顏色。另外,在黑色中,L*a*b*表色系所規定的a*、b*能夠分別根據L*的值來適當選擇。作為a*、b*,例如,兩者都優選為-10~10,更優選為-5~5,特別優選為-3~3的範圍(其中,亦可以為0或幾乎0)。
另外,L*a*b*表色系所規定的L*、a*、b*例如,藉由使用色彩色差計(商品名「CR-200」美能達公司製;色彩色差計)來測定而求出。另外,L*a*b*表色系為國際照明委員會(CIE)於1976年推薦的顏色空間,是指被稱為CIE1976(L*a*b*)表色系的顏色空間。另外,L*a*b*表色系在日本工業標準中,被JISZ 8729所規定。
[黏接劑層]
作為黏接劑層12,使用任意適當的黏接劑。黏接劑層12的厚度從波紋度的觀點考慮,優選為0.5μm以上25μm以下,更優選為0.5μm以上5μm以下,進一步優選為0.5μm以上3μm以下。
作為黏接劑層12,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黏接劑、紫外線固化性環氧系黏接劑、熱固性環氧系黏接劑、熱固性三聚氰胺系黏接劑、熱固性苯酚系黏接劑、乙烯乙酸乙烯酯(EVA)中間膜、聚乙烯醇縮丁醛(PVB)中間膜等。
在設置黏接劑層14的情況下,能夠使用作為黏接劑層12例示的任意黏著劑、黏接劑。黏接劑層14的厚度例如,能夠設為與黏接劑層12同樣。
另外,在本說明書中,所謂黏著劑,是指常溫下具有黏接性,以輕的壓力就黏接於被黏物的層。因此,即使在將黏貼於黏著劑的被黏物進行剝離的情況下,黏著劑也保持實用上的黏著力。另一方面,所謂黏接劑,是指藉由處於物質之間而能夠將物質結合的層。因此,在將黏接劑所黏貼的被黏物進行剝離的情況下,黏接劑不具有實用上的黏接力。
[玻璃層]
玻璃層13沒有特別限定,能夠根據目的而採用適當的物質。玻璃層13根據基於組成的分類,可舉出例如,鈉鈣玻璃、硼酸玻璃、鋁矽酸玻璃、石英玻璃等。另外,根據基於鹼性成分的分類,可舉出無鹼玻璃、低鹼玻璃。上述玻璃的鹼金屬成分(例如,Na2
O、K2
O、Li2
O)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13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,期望玻璃層13具有膜那樣的撓性,因此玻璃層13的厚度優選為300μm以下。玻璃層13的厚度進一步優選為30μm以上200μm以下,特別優選為50μm以上100μm以下。
玻璃層13的波長550nm時的光透射率優選為85%以上。玻璃層13的波長550nm時的折射率優選為1.4~1.65。玻璃層13的密度優選為2.3g/cm3
~3.0g/cm3
,進一步優選為2.3g/cm3
~2.7g/cm3
。
玻璃層13的成型方法沒有特別限定,能夠根據目的採用適當的方法。代表性地,玻璃層13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,冷卻並製作。作為玻璃層13的成型方法,可舉出例如,開口下拉法、融合(fusion)法、漂浮(float)法等。藉由這些方法成型為板狀的玻璃層為了薄板化,或者提高平滑性,可以根據需要,藉由氫氟酸等溶劑進行化學地研磨。
另外,可以在玻璃層13的表面上設置防污層、防反射層、導電層、反射層、裝飾層等功能層。
[製法]
樹脂層11、黏接劑層12、玻璃層13的層疊部例如,使藉由壓製加工等形成為規定的形狀的樹脂層11和玻璃層13經由黏接劑層12進行層疊而獲得。或者可以將樹脂層11和玻璃層13經由黏接劑層12,利用輥對輥工藝,連續地層疊之後,藉由壓製加工等,單片化為任意的尺寸。
[用途]
多層結構體10用於例如,用於使建築物的壁面、傢俱、家電的表面保持光澤的構件、保護膜、裝飾板、部分(partition)等。對於以往例示的多層結構體也同樣。
〈第1實施方式的變形例〉
在第1實施方式的變形例中,示出與第1實施方式的層結構不同的多層結構體的例子。另外,在第1實施方式的變形例中,對於與已經說明的實施方式同一構成部的說明有時省略。
圖2為例示第1實施方式的變形例1涉及的多層結構體的截面圖。如圖2所示那樣,多層結構體10A在樹脂層11的經由黏接劑層12而層疊玻璃層13一側的相反側,經由黏接劑層16而層疊有金屬層15這一點上與多層結構體10(參照圖1)不同。
藉由使樹脂層11為不透明的層(例如,第1實施方式中說明的裝飾層),從而從玻璃層13側不能看見金屬層15和黏接劑層16。在該情況下,金屬層15和黏接劑層16的表面的平面性並不有助於從玻璃層13側的可見性的好壞。
金屬層15的厚度從撓性的維持和強度提高的觀點考慮,優選為10μm以上2000μm以下。作為金屬層15的材料,可舉出例如,不銹鋼、銅、鋁、鐵、鎳、坡莫合金等。作為金屬層15,可以使用市售的不銹鋼箔、銅箔、鋁箔等。
黏接劑層16能夠使用作為黏接劑層12例示的任意黏著劑、黏接劑。黏接劑層16的厚度例如,能夠設為與黏接劑層12同樣。
這樣,藉由在樹脂層11的下層設置金屬層15,從而能夠一邊維持多層結構體10A的撓性一邊提高強度。
另外,作為金屬層15的材料,在選擇鐵、鎳、坡莫合金等強磁性體的情況下,能夠使磁鐵吸附於多層結構體10A。例如,在將多層結構體10A用作貼附於冰箱的表面的裝飾板的情況下,能夠使記錄用的磁鐵、能夠收納小東西的帶磁鐵的架子等吸附於多層結構體10A。
另外,磁鐵對於下層的金屬層15的吸附是由樹脂層11、黏接劑層12和玻璃層13越具有撓性則越薄而獲得的效果,在以往的使用了厚的板玻璃的情況下,得不到該效果。
圖3為例示第1實施方式的變形例2涉及的多層結構體的截面圖。如圖3所示那樣,多層結構體10B在與樹脂層11的經由黏接劑層12而層疊玻璃層13一側的相反側,經由黏接劑層16而層疊有緩衝層17這一點上與多層結構體10(參照圖1)不同。
藉由使樹脂層11為不透明的層(例如,第1實施方式中說明的裝飾層),從而不能從玻璃層13側看到黏接劑層16和緩衝層17。在該情況下,黏接劑層16和緩衝層17的表面的平面性並不有助於從玻璃層13側的可見性的好壞。
緩衝層17為具有緩衝性的層。緩衝層17的厚度從表現良好的緩衝性的觀點考慮,優選為100μm以上2000μm以下。作為緩衝層17的材料,可舉出例如,氨基甲酸酯系樹脂、各種發泡材料等。作為各種發泡材料,可以使用例如,聚烯烴系樹脂、聚丙烯系樹脂、聚苯乙烯系樹脂、聚乙烯系樹脂等。作為緩衝層17,可舉出市售的發泡片。作為市售的發泡片,可舉出例如,日東電工株式會社製的SCF(註冊商標)。
這樣,藉由在樹脂層11的下層設置緩衝層17,從而能夠提高多層結構體10B的緩衝性,緩和從外部對於多層結構體10B所施加的衝擊。另外,可以代替緩衝層17,或者除了緩衝層17以外,層疊絕熱層等具有其它功能的層。
另外,可以在圖2所示的多層結構體10A中,在金屬層15的下層層疊圖3所示的黏接劑層16和緩衝層17。
以上,對於優選的實施方式等進行了詳細說明,但是並不限制於上述實施方式等,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3月30日申請的日本發明專利申請2020-059417號的優先權,將日本發明專利申請2020-059417號的全部內容援用至本國際申請中。
10、10A、10B:多層結構體
11:樹脂層
12,14,16:黏接劑層
13:玻璃層
15:金屬層
17:緩衝層
圖1為例示第1實施方式涉及的多層結構體的截面圖。
圖2為例示第1實施方式的變形例1涉及的多層結構體的截面圖。
圖3為例示第1實施方式的變形例2涉及的多層結構體的截面圖。
10:多層結構體
11:樹脂層
12:黏接劑層
13:玻璃層
14:黏接劑層
Claims (8)
- 一種多層結構體,其具有: 樹脂層,以及 在該樹脂層上經由黏接劑層而被層疊的玻璃層, 該玻璃層的厚度為10μm以上300μm以下, 該樹脂層與該黏接劑層的界面的算術平均波紋度Wa為10μm以下。
- 如請求項1的多層結構體,該樹脂層的厚度為20μm以上1000μm以下。
- 如請求項1或2的多層結構體,該樹脂層為透明的層。
- 如請求項1或2的多層結構體,該樹脂層為裝飾層。
- 如請求項4的多層結構體,該裝飾層為黑色。
- 如請求項1至5中任一項的多層結構體,在該樹脂層的與層疊該玻璃層一側的相反側,經由第2黏接劑層而層疊有金屬層。
- 如請求項6的多層結構體,該金屬層為強磁性體。
- 如請求項1至7中任一項的多層結構體,在該樹脂層的與層疊該玻璃層一側的相反側,經由第2黏接劑層而層疊有緩衝層。
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JP5615134B2 (ja) * | 2010-04-30 | 2014-10-29 | 日東電工株式会社 | 透明基板の製造方法 |
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 |
JP6234658B2 (ja) * | 2010-12-16 | 2017-11-22 | 大日本印刷株式会社 | 表示用前面板および表示装置 |
KR101498938B1 (ko) * | 2011-07-13 | 2015-03-05 | 니폰 덴키 가라스 가부시키가이샤 | 복합 기판 |
JP6441687B2 (ja) * | 2015-01-14 | 2018-12-19 | 株式会社カネカ | タッチパネル用基板の製造方法 |
WO2019151091A1 (ja) * | 2018-01-31 | 2019-08-08 | 日東電工株式会社 | 光学積層体ロール |
JP7145720B2 (ja) | 2018-10-11 | 2022-10-03 | 西川ゴム工業株式会社 | ウェザストリップ |
JP6856720B2 (ja) * | 2019-08-20 | 2021-04-07 | 日東電工株式会社 | ガラス層付積層体および該ガラス層付積層体を含む画像表示装置 |
JP7357500B2 (ja) * | 2019-09-26 | 2023-10-06 | 日東電工株式会社 | 複層構造体 |
-
2020
- 2020-03-30 JP JP2020059417A patent/JP2021154664A/ja active Pending
-
2021
- 2021-03-10 WO PCT/JP2021/009467 patent/WO2021199985A1/ja unknown
- 2021-03-10 CN CN202180024540.1A patent/CN115335219A/zh active Pending
- 2021-03-10 EP EP21781148.8A patent/EP4129650A4/en not_active Withdrawn
- 2021-03-10 KR KR1020227033684A patent/KR20220158730A/ko unknown
- 2021-03-10 US US17/915,027 patent/US20230053803A1/en active Pending
- 2021-03-16 TW TW110109394A patent/TW202202340A/zh unknown
-
2024
- 2024-04-25 JP JP2024071283A patent/JP2024097826A/ja active Pending
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US20230053803A1 (en) | 2023-02-23 |
JP2021154664A (ja) | 2021-10-07 |
CN115335219A (zh) | 2022-11-11 |
EP4129650A1 (en) | 2023-02-08 |
EP4129650A4 (en) | 2023-09-06 |
KR20220158730A (ko) | 2022-12-01 |
JP2024097826A (ja) | 2024-07-19 |
WO2021199985A1 (ja) | 2021-10-07 |
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