JP2018022062A - フォルダブルディスプレイ用フィルムおよびその製造方法 - Google Patents
フォルダブルディスプレイ用フィルムおよびその製造方法 Download PDFInfo
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- JP2018022062A JP2018022062A JP2016153653A JP2016153653A JP2018022062A JP 2018022062 A JP2018022062 A JP 2018022062A JP 2016153653 A JP2016153653 A JP 2016153653A JP 2016153653 A JP2016153653 A JP 2016153653A JP 2018022062 A JP2018022062 A JP 2018022062A
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- film
- meth
- foldable display
- acrylate
- polymerizable composition
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
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Abstract
【解決手段】本発明に係るフォルダブルディスプレイ用フィルム19は、厚みが30μm〜200μmの薄膜状で、紫外線硬化型アクリル系樹脂12の硬化フィルムからなる。
【選択図】図1
Description
上記(A)ポリイソシアネート化合物(但し、脂環構造を有するものを除く。)と、水酸基含有(メタ)アクリレートとを反応させてなる多官能ウレタン(メタ)アクリレートは、例えば、下記化1に示すものである。
成分(B)は、脂環構造を有する2官能(メタ)アクリレートである。成分(B)の脂環構造を有する多官能(メタ)アクリレートとしては、ビス(ヒドロキシメチル)トリシクロ[5.2.1.02,6]デカン=ジ(メタ)アクリレート、ビス(ヒドロキシ)トリシクロ[5.2.1.02,6]デカン=アクリレートメタクリレート、ビス(ヒドロキシ)ペンタシクロ[6.5.1.13,6.02,7.09,13]ペンタデカン=ジ(メタ)アクリレート、ビス(ヒドロキシ)ペンタシクロ[6.5.1.13,6.02,7.09,13]ペンタデカン=アクリレートメタクリレート、2,2−ビス[4−(β−メタクリロイルオキシエトキシ)シクロヘキシル]プロパン、1,3−ビス(メタクリロイルオキシメチル)シクロヘキサン、1,3−ビス(メタクリロイルオキシエチルオキシメチル)シクロヘキサン、1,4−ビス(メタクリロイルオキシメチル)シクロヘキサン、1,4−ビス(メタクリロイルオキシエチルオキシメチル)シクロヘキサンなどの2官能(メタ)アクリレート、1,3,5−トリス(メタクリロイルオキシメチル)シクロヘキサン、1,3,5−トリス(メタクリロイルオキシエチルオキシメチル)シクロヘキサンなどの3官能(メタ)アクリレートがあげられる。上記成分(B)としては、フレキシブル性の点から2官能(メタ)アクリレートを用いる。耐熱性の点から、2官能メタクリレートを用いることが好ましい。
上記重合性組成物は、成分(A)及び成分(B)の他に、光重合開始剤である成分(C)を含有していてもよい。成分(C)としては、光重合開始剤として用いることができれば特に限定されないが、例えば、ベンゾイン誘導体、ベンジルケタール、α−ヒドロキシアセトフェノン、α−アミノアセトフェノン、アシルフォスフィンオキサイド、チタノセン類、O−アシルオキシム型開始剤、ベンゾフェノン/アミン系光重合開始剤(ベンゾフェノンとアミンとの混合物)、ミヒラーケトン/ベンゾフェノン系光重合開始剤(ミヒラーケトンとベンゾフェノンとの混合物)、チオキサントン/アミン系光重合開始剤(チオキサントンとアミンとの混合物)等が挙げられ、具体的には、1,3−ジ(tert−ブチルジオキシカルボニル)ベンゾフェノン、3,3’,4,4’−テトラキス(tert−ブチルジオキシカルボニル)ベンゾフェノン、3−フェニル−5−イソオキサゾロン、2−メルカプトベンズイミダゾール、ビス(2,4,5−トリフェニル)イミダゾール、2,2−ジメトキシ−1,2−ジフェニルエタン−1−オン(商品名イルガキュア651、チバ・ジャパン株式会社製)、1−ヒドロキシ−シクロヘキシル−フェニル−ケトン(商品名イルガキュア184、チバ・ジャパン株式会社製)、2−ベンジル−2−ジメチルアミノ−1−(4−モルフォリノフェニル)−ブタン−1−オン(商品名イルガキュア369、チバ・ジャパン株式会社製)、ビス(η5−2,4−シクロペンタジエン−1−イル)−ビス(2,6−ジフルオロ−3−(1H−ピロール−1−イル)−フェニル)チタニウム(商品名イルガキュア784、チバ・ジャパン株式会社製)、ビス(2,4,6−トリメチルベンゾイル)−フェニルフォスフィンオキサイド(商品名イルガキュア819)等が挙げられる。これらの光重合開始剤は単独で用いても、2種以上を併用してもよい。
本発明においては、本発明のFDフィルムの物性を損ねない範囲で、他の成分を含んでいてもよい。上記他の成分としては、例えば、成分(A)及び(B)以外の3官能以上の多官能ポリエステルアクリレート、成分(A)及び(B)以外のエチレン性不飽和結合を有する単量体、増感剤、重合禁止剤、熱重合開始剤、酸化防止剤、紫外線吸収剤、消泡剤、レベリング剤、ブルーイング剤、染顔料、フィラー等が挙げられる。
厚み250μmとなるように調整した以外は実施例1と同様にしてFDフィルムを作成した。
ポリエチレンテレフタレート(PET)フィルムの両面に活性エネルギー線硬化型アクリル系樹脂を含むハードコート層を備えるハードコートフィルムを作成し、評価を行った。
JIS K−5600−5−4に準拠して、ハードコート層の表面に750gの荷重をかけた硬度2Hから9Hの鉛筆(三菱UNI)を用い、試験を行い、キズによる外観の変化を目視で評価した。
JIS−K5600−5−1に準拠して、マンドレル試験を実施したときに、FDフィルムにクラックの発生しないマンドレル直系を評価した。
FDフィルム表面に、カッターナイフで1mm角の碁盤目を100個刻み、そこにセロハンテープを貼ってから引き剥がす試験を行い、100個の碁盤目のうち剥がれずに残った碁盤目の数で評価した。
2 トレイ
3 バックアップローラ
4 ロールナイフ
5,6 ローラ
7 UV照射装置
8,10 基材ローラ
9,11 PET基材フィルム
12 重合性組成物
13 ラミネートフィルム
14 ラミネートフィルムロール
15,16 剥離ローラ
17,18,20 巻き取りローラ
19 FDフィルム
Claims (8)
- 厚みが30μm〜200μmの薄膜状で、紫外線硬化型アクリル系樹脂の硬化フィルムからなる、フォルダブルディスプレイ用フィルム。
- 前記紫外線硬化型アクリル系樹脂は、(A)ポリイソシアネート化合物(但し、脂環構造を有するものを除く。)と水酸基含有(メタ)アクリレートとを反応させてなる多官能ウレタン(メタ)アクリレートと、(B)脂環構造を有する2官能(メタ)アクリレートとを含む、請求項1に記載のフォルダブルディスプレイ用フィルム。
- 前記硬化フィルムの鉛筆硬度は3H〜9Hであり、屈曲耐久性はφ10mm以下である請求項1に記載のフォルダブルディスプレイ用フィルム。
- 前記硬化フィルムの少なくとも一方の面にガスバリア膜が設けられた、請求項1〜3のいずれか1項に記載のフォルダブルディスプレイ用フィルム。
- 前記硬化フィルムの少なくとも一方の面に透明導電膜が設けられた、請求項1〜3のいずれか1項に記載のフォルダブルディスプレイ用フィルム。
- 前記硬化フィルムの少なくとも一方の面に反射防止膜が設けられた、請求項1〜3のいずれか1項に記載のフォルダブルディスプレイ用フィルム。
- 前記硬化フィルムの少なくとも一方の面に耐指紋膜が設けられた、請求項1〜3のいずれか1項に記載のフォルダブルディスプレイ用フィルム。
- 未処理面を有する透明基材フィルムを2枚準備する工程と、
1枚の透明基材フィルムの前記未処理面の上に、紫外線硬化型アクリル系樹脂を含む重合性組成物を、その硬化後の厚みが30μm〜200μmになるように、その量を制御して塗布する工程と、
前記塗布された重合性組成物の上に、もう1枚の透明基材フィルムを、その未処理面が接するようにラミネートし、3層構造のラミネートフィルムを形成する工程と、
前記3層構造のラミネートフィルムに紫外線を照射して、中間層である前記重合性組成物を硬化させる工程と、
紫外線照射後の前記ラミネートフィルムから、両面に位置する前記2枚の透明基材フィルムを剥離して、紫外線硬化型アクリル系樹脂の硬化フィルムからなる単層のフォルダブルディスプレイ用フィルムを得る工程と、を備えたフォルダブルディスプレイ用フィルムの製造方法。
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