JP6857657B2 - 保護ディスプレイフィルム - Google Patents
保護ディスプレイフィルム Download PDFInfo
- Publication number
- JP6857657B2 JP6857657B2 JP2018531452A JP2018531452A JP6857657B2 JP 6857657 B2 JP6857657 B2 JP 6857657B2 JP 2018531452 A JP2018531452 A JP 2018531452A JP 2018531452 A JP2018531452 A JP 2018531452A JP 6857657 B2 JP6857657 B2 JP 6857657B2
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- JP
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- layer
- display
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- film
- display film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B32B2307/7244—Oxygen barrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/734—Dimensional stability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2375/00—Polyureas; Polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/206—Organic displays, e.g. OLED
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Description
90/10PENコポリマーを、米国特許第8,263,731号の実施例対照Bに例示されているように調製した。水分除去のために真空をかけた二軸押出機を使用して、この材料を溶融押出した。溶融物を525°Fまで加熱し、押出ダイに送り、冷却されたドラム上で急冷した。この急冷したフィルムを、235〜250°Fの温度で、縦方向(machine direction)に3.3−1に延伸し、冷却した。この縦方向に延伸したフィルムを横延伸機(tenter machine)に供給し、これがフィルム両端を把持し、再び255〜300°Fまで加熱し、フィルムを横方向に3.7−1から4.1−1まで延伸した。次に同じ横延伸機においてフィルムを450°Fで8〜30秒間アニーリングした。フィルム両端をトリミングして除去し、フィルムを巻いてロール状にする前に、ポリエチレンプレマスクを適用した。
触媒を含むポリオールの調製−低せん断ブレードを備えた標準的な混合機に、200lbのK−FLEX 188及び42gのDABCO T−12を入れた。70℃及び28インチの水銀柱で4時間、真空下で成分を混合して、樹脂中の溶存気体を除去した。得られた樹脂を、後で使用するために5ガロンの円筒型容器に入れた。
触媒を含むポリオール及びDESMODUR N3300を、質量流量制御器(mass flow controller)を備えた別々のポンプカート(pump cart)に添加した。触媒を含むポリオールを60℃まで加熱して粘度を低下させた。2つの成分を、制御された化学量論で、ポンプカートから質量流量制御器を介してKenicsスタティックミキサー(長さ355mm、32個のエレメントを有する)に送った。ポリウレタン反応混合物を12”幅のT−50ライナーの間に入れ、約3mil厚さのポリウレタンコーティングを生じるようにギャップを設定して、ノッチバーの下からフィルムを連続的に引き出した。このアセンブリを熱板上で高温で加熱して、ポリウレタンフィルムをゲル化し、70℃のオーブン中に16時間入れて硬化させた。試験の前に、両方のライナーを取り外した。
触媒を含むポリオール及びDESMODUR N3300を、質量流量制御器を備えた別々のポンプカートに添加した。触媒を含むポリオールを60℃まで加熱して粘度を低下させた。2つの成分を、制御された化学量論で、ポンプカートから質量流量制御器を介してKenicsスタティックミキサー(長さ355mm、32個のエレメントを有する)に送った。2成分ポリウレタン反応混合物を12”COPライナーと、上述のプライマー処理したLmPENフィルムとの間でコーティングした。反応混合物を、連続的に、フィルム間で所望の厚さのポリウレタンコーティングに配置した。このアセンブリを熱板上で高温で加熱して、ポリウレタンフィルムをゲル化し、70℃のオーブン中に16時間入れて硬化させた。試験の前に、COPライナーを取り外した。硬化したポリウレタンコーティングの架橋密度を、実施例1〜5のように算出した。
Leistritz ZSE 18 HPe 18mm二軸及び単層ダイにおいて、製造者の推奨する押出温度及びダイ温度特性プロファイル(die temperature profiles)を使用して、熱可塑性ポリウレタン(TPU)を押し出した。ESTANE TPUはLubrizolから市販されており、TEXIN TPUはBayer Material Science LLCから市販されている。押出機条件は表4に示す。単層ダイ及びフィードブロック条件は表5に示す。
ガラス転移温度
TA Instruments Model Q2000 Differential Scanning Calorimeterを使用して、架橋密度に応じたポリウレタンコーティングのガラス転移温度を特性評価した。2℃/分の昇温速度で走査を行った。空のサンプルパンを標準として使用した。結果を下記の表4に示す。C3では、プライマー処理したLmPENのフィルム片を標準パンに入れた。ガラス転移の開始及び中点を、ASTM E1356−08(2014)に従って決定した。
実施例1〜5並びに比較例C1、C2、及びC3のサンプルを、幅6.35mm及び長さ約4cmのストリップに切断した。各フィルムの厚さを測定した。TA Instruments製のQ800 DMAの引張グリップに、6mm〜9mmの初期グリップ間隔で、フィルムを取り付けた。次に、2℃/分の速度での−20℃〜200℃の温度勾配の全体にわたって、0.2%ひずみ及び1Hzの振動で、サンプルを試験した。誘電正接シグナルが最大に達した温度を、ピーク誘電正接温度として記録した。
調製した実施例の光学的特性は、Hazegard測定器を使用して測定した。光透過率(luminous transmission)、透明度、及びヘイズは、Gardner Haze−Guard Plusモデル4725(BYK−Gardner(Columbia,MD)から入手可能)を使用して、ASTM D1003−00に従って測定した。表7の各結果は、所与のサンプルにおける3回の測定の平均である。
保護フィルムの2.125”×4.0”サンプルを、支柱間の間隔を1cmにして試験管立てに配置し、それによって、5mmの有効な曲げ半径を作り出した。温度60℃相対湿度93%に制御されたチャンバーにサンプルを24時間入れ、その後、その試験管立てから取り出し、24時間垂直に吊した。その後、水平面に対して保護フィルムサンプルが開いた角度を記録した。180°は、サンプルが完全に折り畳まれた状態であったことを意味する。0°は、サンプルが完全に開いて水平なフィルムに戻ったことを意味する。結果を表8に示す。熱可塑性ポリウレタン(比較例C11〜16)は開かないことが分かる。架橋ポリウレタンコーティングを有するサンプルは全て、50〜70°の角度まで開いた。
ASTMメソッドD522/522M−13「Mandrel Bend Test of Attached Organic Coatings」の修正版、試験方法B、円筒形マンドレル試験を使用して、保護フィルムの曲げ特性を試験した。ASTM法で指示されているように90°まで曲げる代わりに、全てのサンプルをマンドレルの周囲に180°巻きつけ、その後損傷を評価した。全てのサンプルは、コーティングを外径側にして(すなわち、コーティングは伸張状態になる)、試験した。クラックが認められなかった最小の円筒サイズを、最小曲げ半径として報告した(合否判定方式)。試験開始前に、サンプルを21±2℃及び50±5%の相対湿度で少なくとも24時間前処理した。結果を表9に示す。
複数回の折り畳み動作に対する保護フィルムの耐久性を、動的折り畳み試験機を使用して評価した。動的折り畳み試験機は、2つの同一平面上のプレートを有し、プレートの一方は固定されており、他方のプレートは回転して互いに重なり合って向き合う。閉じているときのプレート間の間隙は、約6mmに調節されており、それによって曲げ半径は約3mmとなる。7”×1.75”の各サンプル片を、ロータリーカッターを使用して切断し、ライナーを取り外した。両面Scotchパーマネントテープを使用して、コーティング側を上にして折り畳みプレートにサンプルを貼り付けた(コーティングは圧縮状態になる)。フィルムが圧迫されない(unconstrained)折り畳み軸の両側に約6mm幅の空き領域ができるように、テープをプレートに貼った。折り畳み速度は折り畳み約20回/minとし、試験は200,000サイクル行った。コーティングクラック、層間剥離又はヘイズなどの損傷の痕跡に関して、10,000〜25,000サイクル毎にサンプルを目視で検査した。結果を表9に示す。動的折り畳み損傷は、各実施例につき全部で3つのサンプル試験のうちの数である。
1mm直径の100Cr6ステンレス鋼ボールチップを取り付けたRevetest RSTを備えたスクラッチ試験機(Anton Paar(USA))を使用して、コーティングされた基材の耐擦傷性を特性評価した。各実施例をガラススライドに固定し、次に、一定の垂直荷重及び60mm/minの速度で、サンプルに一連の長さ8mmのスクラッチを形成する。次にサンプルを離して、21±2℃及び50±5%相対湿度で修復させた。24時間の修復後に肉眼で圧痕(デント)が見えなかった最も高い垂直荷重を、限界垂直荷重(N)として記録し、表10において報告した。
Claims (3)
- 透明なポリマー基材層と、
前記透明なポリマー基材層上に配置された透明な脂肪族架橋ポリウレタン層と、
を含むディスプレイフィルムであって、前記透明な脂肪族架橋ポリウレタン層は、11〜27℃の範囲のガラス転移温度及び0.5〜2.5の範囲の損失正接ピーク値を有し、
前記ディスプレイフィルムは、1%以下のヘイズ値を有する、ディスプレイフィルム。 - 透明なポリマー基材層と、
前記透明なポリマー基材層上に配置された透明な脂肪族架橋ポリウレタン層と、
を含むディスプレイフィルムであって、前記透明な脂肪族架橋ポリウレタン層は、11〜27℃の範囲のガラス転移温度及び0.5〜2.5の範囲の損失正接ピーク値を有し、
前記ディスプレイフィルムは、3mmの半径での少なくとも100,000回の曲げサイクルの後に無傷である、ディスプレイフィルム。 - 光学ディスプレイと、
前記光学ディスプレイ上に配置された保護フィルムであって、前記保護フィルムは、
透明なポリマー基材層、
前記透明なポリマー基材層上に配置された透明な脂肪族架橋ポリウレタン層
を含み、前記透明な脂肪族架橋ポリウレタン層は、11〜27℃の範囲のガラス転移温度及び0.5〜2.5の範囲の損失正接ピーク値及び0.34〜0.65mol/kgの範囲の架橋密度を有し、
前記ディスプレイフィルムは、1%以下のヘイズ値を有する、保護フィルムと、
前記透明なポリマー基材層を前記光学ディスプレイに固定する光学接着剤層と、
を備える物品。
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US14/969,002 US9780318B2 (en) | 2015-12-15 | 2015-12-15 | Protective display film |
PCT/US2016/064315 WO2017105850A1 (en) | 2015-12-15 | 2016-12-01 | Protective display film |
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CN108367553B (zh) | 2020-09-18 |
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EP3390052A4 (en) | 2019-07-24 |
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