JP2023018663A - フィルム、光透過積層体、カバーフィルム及び多重層電子装備 - Google Patents
フィルム、光透過積層体、カバーフィルム及び多重層電子装備 Download PDFInfo
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- VDBXLXRWMYNMHL-UHFFFAOYSA-N decanediamide Chemical compound NC(=O)CCCCCCCCC(N)=O VDBXLXRWMYNMHL-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 125000004427 diamine group Chemical group 0.000 description 1
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- 230000003628 erosive effect Effects 0.000 description 1
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- 238000001879 gelation Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
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- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
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- FJXWKBZRTWEWBJ-UHFFFAOYSA-N nonanediamide Chemical compound NC(=O)CCCCCCCC(N)=O FJXWKBZRTWEWBJ-UHFFFAOYSA-N 0.000 description 1
- OEIJHBUUFURJLI-UHFFFAOYSA-N octane-1,8-diol Chemical compound OCCCCCCCCO OEIJHBUUFURJLI-UHFFFAOYSA-N 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
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- 229920006146 polyetheresteramide block copolymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
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Abstract
Description
弾性層100は、優れた機械的物性を有し、特に、低温で物性が優れる。
R80/20は、高温貯蔵モジュラスの比率であり、SMnは、温度n℃で測定した前記弾性層の貯蔵モジュラス(Mpa)である。
R-40/20は、低温貯蔵モジュラスの比率であり、
SMnは、温度n℃で測定した前記弾性層の貯蔵モジュラス(Mpa)である。
D-40-20は、低温貯蔵モジュラスの差であり、
SMnは、温度n℃で測定した前記弾性層の貯蔵モジュラス(Mpa)である。
Xoは、初期の弾性層の長さ(mm)であり、
X2%は、弾性層を2%引っ張った後の長さ(mm)であり、
Xfは、50mm/minの速度で2%引っ張った後、再び50mm/minの速度で元の長さに復元することを1サイクルとして、100回のサイクル後の弾性層の長さ(mm)である。
他の一具現例に係るフィルム190は弾性層100を含む。
フィルム190に含まれる弾性層だけでなく、弾性層以外の層も優れた光学的特性を有することができる。
他の具現例において、多重層電子装備900は弾性層100を含む。
具現例に係る弾性層100の製造方法は、高分子樹脂を弾性シートとして形成するステップと;キャリアフィルム92上に前記弾性シート80が配置された組立体をローラ間に通過させて弾性層100を設けるステップと;を含む。
高分子樹脂の準備
弾性層を含むフィルムの実施例または比較例に適用される樹脂は、以下のように準備した。
Arkema Pebax(登録商標) 2533(PEBA樹脂1)、Arkema Pebax(登録商標) 5533(PEBA樹脂2)、Arkema Pebax(登録商標) 7033(PEBA樹脂3)、Arkema Pebax(登録商標) Rnew(登録商標) 55R53(PEBA樹脂4)、Arkema Pebax(登録商標) Rnew(登録商標) 63R53(PEBA樹脂5)、Arkema Pebax(登録商標) Rnew(登録商標) 70R53(PEBA樹脂6)、Arkema Pebax(登録商標) Rnew(登録商標) 72R53(PEBA樹脂7)、Arkema Pebax(登録商標) Rnew(登録商標) 80R53(PEBA樹脂8)などをアルケマフランス社から入手し、以下の実験に適用した。
PA610(PA樹脂1)、PA612(PA樹脂2)、PA1010(PA樹脂3)、PA1012(PA樹脂4)、PA12(PA樹脂5)、AESNO TL(PA樹脂6)、PA11(PA樹脂7)などをアルケマフランス社から入手し、以下の実験に適用した。
TPUは、Argotec社の46510フィルム(脂肪族TPU)を購入して適用した。PETフィルムは、SKC社製のPETフィルムNRFを適用した。
前記で準備した各樹脂を押出機に入れて溶融混練した後、単層シートとして弾性シートを押出した。このとき、溶融混練の温度は、PEBA樹脂7の場合に約220℃を適用し、各樹脂に応じて約200~300℃の範囲で溶融混練の温度を調節して行った。製造された単層の弾性シートは、連続した工程により一枚のキャリアフィルム(50μm~250μmの厚さのPETフィルム。PETフィルムのRaが0.001~0.01μmであるものを適用する)上に配置して組立体を形成し、この組立体が10~120℃の温度に加熱されたキャスティングロールとスクイージングロールとの間を通過しながら、弾性層を含む積層体を製造した。以降、キャリアフィルムを除去した約100μmの厚さの弾性層を、以下で実施例のフィルムとし、物性を評価した。それぞれのフィルムは、前記の樹脂と同一に命名して提示した。
弾性層の低温損傷指数などの評価
引張強度、伸度などは、標準ASTM D882、移動速度50mm/minを適用し、インストロン(Instron)社の万能材料試験機(UTM)で測定した。但し、温度の調節のためのチャンバを万能材料試験機と連結し、温度を調節して測定し、それぞれ、+20℃、-10℃、-40℃で測定した。測定された引張強度(Tensile Strength)、伸度(Elongation)、引張弾性率(Tensile Modulus)などは、下記表1に示した。
ASTM D4065に準拠して、TAインスツルメント社のDMA Q800モデルを適用して貯蔵弾性率(Storage Modulus、E')を評価した。前記装置はDMA(Dynamic Mechanical Analysis)テンションモードで1Hz、2℃/minを適用し、温度区間(-40~+80℃)において貯蔵弾性率(E')をMpa単位で測定した結果を表2に示した。Amplitudeは5μmが適用され、Pre forceは0.01Nが適用された。
表面粗さは、ミツトヨ社(MITUTOYO)のSJ-310モデルを用いて、ASTM D4417に準拠して評価した。
80mm×25mmのフィルムを、フィルムの両端のそれぞれ15mmにジグ(jig)を用いて固定し、応力が加えられるフィルムの長さは50mm×25mmにセットした。前記フィルムを50mm/minの速度で2%引っ張った後、再び50mm/minの速度で元の長さに復元することを1サイクルとして、100回のサイクル後の引張試験を行った。100回のサイクル後のフィルムのジグ間の長さ(Xf)を測定し、初期のフィルムのジグ間の長さ(Xo、50mm)と比較して、下記式3によってリカバリー指数を評価した。
Xoは、初期の弾性層の長さ(mm)であり、
X2%は、弾性層を2%引っ張った後の長さ(mm)であり、
Xfは、50mm/minの速度で2%引っ張った後、再び50mm/minの速度で元の長さに復元することを1サイクルとして、100回のサイクル後の弾性層の長さ(mm)である。
屈折率の測定は、ATAGO社のDR-A1-plusモデルを適用して摂氏23度の温度及び550nmの波長で測定した。
フィルムの準備
カバーフィルム試験片の製造:50μmの厚さの透明ポリイミドフィルム(SKC社製)上に、100μmの厚さの3M社の市販のOCA(-40℃で測定した貯蔵モジュラスと+80℃で測定した貯蔵モジュラスとの差が-100~+100kPa以内であるもの)を粘着層として使用し、前記粘着層上に、前記で製造した100μmの厚さの弾性層(PEBA樹脂7で製造したフィルム)を積層して、実施例1のカバーフィルム試験片を製造した(図2の(b)の構造)。
1)引張衝撃強度の評価
JIS K 7160に準拠して弾性層の引張衝撃強度(tensile-impact strength)を評価した。測定温度は23℃、50%R.H.、測定条件は4.0Jのペンジュラム(pendulum)、共振角度を150°として適用した衝撃強度(Impact strength)及び吸収エネルギー(Absorbed energy)を測定し、その結果を下記表7に示した。
動的曲げ試験( Dynamic bending test):保護フィルム試験片を用いてIEC 62715-6-1に準拠して、曲率半径2mm及び2秒/回の曲げの程度を適用し、総20万回のテストを行った後、浮き上がりが発生する場合に×、浮き上がりが発生しない場合に○で表示した。その結果は、下記表8に示した。
100a 弾性層の一面
100b 弾性層の他面
120 硬度層
130,130' 粘着層
140 ハードコーティング層
150 離型フィルム
80 弾性シート
92 キャリアフィルム
94 シート保護フィルム
40 第1ロール、キャスティングロール
60 第2ロール、スクイージングロール
90 シート積層体
190 フィルム、フィルム積層体
300 発光機能層
320 発光層
322 信号伝達層
324 発色層
326 封止層
340 センサ層
360 偏光層
380 支持層
900 多重層電子装備
Claims (15)
- 弾性層を含み、
前記弾性層は、屈折率が1.48~1.58であり、
低温損傷指数は、特定の温度での引張弾性率と引張強度との差であり、
前記弾性層は、-40℃で前記低温損傷指数が1,300MPa以下である、フィルム。 - 前記弾性層は、-10℃で引張弾性率が3,000MPa以下である、請求項1に記載のフィルム。
- 前記弾性層は、面内位相差Reが300nm以下である、請求項1に記載のフィルム。
- 前記弾性層は、-40℃で貯蔵モジュラスが2300MPa以下である、請求項1に記載のフィルム。
- 粗さ基準値は、一面の表面粗さRaの値であるRa1及び他面の表面粗さRaの値であるRa2のうちの大きい値であり、
前記弾性層は、0.5μm以下の粗さ基準値を有する、請求項1に記載のフィルム。 - 弾性層、及び前記弾性層の一面上に配置される硬度層を含み、
前記弾性層は、-40℃で引張弾性率が2,000MPa以下であり、
前記弾性層の屈折率は、前記硬度層の屈折率よりも小さい、フィルム。 - 前記弾性層は、-10℃で伸度が200%以上である、請求項6に記載のフィルム。
- 前記硬度層は、ポリイミドフィルムまたはガラス層を含み、
前記フィルムは、総厚さが3,000μm以下である、請求項6に記載のフィルム。 - 前記弾性層は、光透過度が85%以上であり、ヘイズが3%以下である、請求項6に記載のフィルム。
- 請求項1又は6に記載のフィルムを含む、光透過積層体。
- 繰り返し単位としてアミドまたはその残基を含む高分子樹脂から弾性シートとして形成するステップと、
キャリアフィルム上に前記弾性シートが配置された第1組立体をローラ間に通過させて、前記キャリアフィルム上に位置する弾性層を含む第2組立体を設けるステップとを含んで、
請求項1又は6に記載のフィルムを製造する、フィルムの製造方法。 - 請求項1又は6に記載のフィルムを含む、カバーフィルム。
- 前記弾性層の一面または他面上に配置されるガラス層をさらに含み、
前記ガラス層は、厚さが200μm以下である強化ガラスである、請求項12に記載のカバーフィルム。 - 発光機能層及びフィルムを含み、
前記発光機能層は、外部の信号に従って光を放出するかまたは放出しない表示領域を有し、
前記フィルムは、請求項1又は6に記載のものであり、
前記フィルムは、前記表示領域の上面または背面上に配置される、多重層電子装備。 - 発光機能層及びフィルムを含み、
前記発光機能層は、外部の信号に従って光を放出するかまたは放出しない表示領域を有し、
前記フィルムは、請求項1又は6に記載のものであり、
前記フィルムは、前記発光機能層の一面上に配置され、前記表示領域の少なくとも一部を覆う、多重層電子装備。
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