JP2017100446A - 平滑な表面を有し、巻取性良好な透明二軸延伸ポリエステルフィルム - Google Patents
平滑な表面を有し、巻取性良好な透明二軸延伸ポリエステルフィルム Download PDFInfo
- Publication number
- JP2017100446A JP2017100446A JP2016229843A JP2016229843A JP2017100446A JP 2017100446 A JP2017100446 A JP 2017100446A JP 2016229843 A JP2016229843 A JP 2016229843A JP 2016229843 A JP2016229843 A JP 2016229843A JP 2017100446 A JP2017100446 A JP 2017100446A
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- Prior art keywords
- film
- particles
- outer layer
- weight
- less
- Prior art date
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- Granted
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Classifications
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Abstract
Description
ジカルボン酸とジオールから、あるいはそれよりは好ましくないがジカルボン酸エステル、好ましくはジメチルエステルとジオールとを出発物質として、個々の層用のポリエステルポリマーを重縮合によって製造する。使用するポリエステルのSV値(固有粘度)は、好ましくは500〜1300であり、個々の層のSV値はそれほど重要ではないが、使用するポリマーのSV値の平均が700を超える必要があり、好ましくは750を超える。これらの値は、フィルムの上述のSV値を達成するために都合よく使用される。
本発明のフィルムは、平滑なラッカー表面の製造/提供のための補助フィルムとして、特にラッカーがUV硬化である場合に、極めて有用である。ここでラッカーは、フィルムに又は基材に塗布され、基材に塗布される方が好ましい。この場合に、フィルムの平滑な側が、ついで張力下でラッカーに積層させられる。すなわち、ラッカーを有するフィルムが基材に積層させられる。
原料およびフィルムの特性付けを行うために以下の物性値を測定した。
粒子の平均粒径d50はMalvern MasterSizer 2000を使用して測定した。水を入れたセルにサンプルを入れ、試験装置にセットする。レーザーを使用して分散体を測定し、較正曲線と信号とを比較して粒径分布を決定した。粒径分布は、平均粒径d50(平均値、中心値)とSPAN98(粒径の分布度合い)の2つのパラメータにより表現される。試験は自動的に行われ、粒径d50の数学的な計算も一緒に行われる。粒径d50の値は、累積粒径分布曲線から決定する。縦軸50%における交点から横軸上の所望のd50の値を求めた。
UV/可視光ツインビームスペクトロメーター(Lambda 12又は35、Perkin Elmer社製(米国))を用いてフィルムの光線透過率を測定した。これは、平板サンプルホルダーを使用し、光線の進行方向と垂直に約(3×5)cmのサンプルの光線透過部分を測定に使用した。測定光線は、検知器に対し50mm Ulbricht sphereによって照射、透過させた。強度は、所望の波長においける透過率を測定することにより決定した。バックグラウンド物質としては空気を使用した。所望の波長における透過率を読み取った。
光学的な透明性/ヘーズはフィルム性能に重要であるため、プラスチックフィルムのヘーズ及び透過率を測定した。測定は、ASTM D1003−61 in a haze−gard XL−21 1ヘーズメーター(BYK Gardner社製)を用いて行った。
黄変指数(YID)は無色状態から黄色方向への色の偏差をDIN 6167に従って測定した。
固有粘度SV(DCA(ジクロロ酢酸))はDIN 53726に従い、1%ジクロロ酢酸溶液で、ウベローデ型粘度計を使用し、25℃で測定した。無次元SV値は以下の相対粘度(ηrel)の式から算出した。
フィルムの機械的性質は、100mm×15mmのフィルム片を使用し、DIN EN ISO 572−1及び−3(サンプル種2)に基づき応力測定を行った。
巻き取り後の平滑な外層C側の表面性状を目視で判断し、フィルム外観を判断した。
ISO 25178−2に従い、Bruker社製Contour GT−K/A白色光干渉分光顕微鏡を使用し、フィルム表面トポグラフィーを測定した。0.95 mm×1.27mm(480×640ピクセル)の面積範囲を5.1倍に拡大した。この測定で、10×10cmの測定用フィルム片を顕微鏡に配置し、5cm径の金属リングを乗せて固定した。測定はVSIモード(位相シフト干渉法)により行われた。z軸における測定長は25μmにセットした。考えられるサンプルの起伏は除外した。突起側の測定値が無い場合は、計算によって補った(データ修復)。
ポリマー混合物を292℃で融解し、フラットフィルムダイを介し、静電密着法により、50℃に制御された冷却ロール上に押出した。引き取られたシートを長手方向に延伸し、次いで横方向に延伸し、熱固定を行い、二軸延伸ポリエステルフィルムを得た。フィルムの製造条件を以下に示す。
Claims (16)
- 少なくとも1層のベース層Bと、ベース層Bに対しそれぞれ反対側に配置される粗面を有する外層A及び平滑な面を有する外層Cとの少なくとも3層から成る二軸延伸ポリエステルフィルムであって、外層Aが炭酸カルシウム粒子を含有し、外層Cの粒子の含有量が外層Cの重量に対し0.1重量%未満であり、各層を構成する全てのポリエステルは、繰り返し単位として2,6−ナフタレンジカルボン酸から誘導される単位を含まず、フィルムの全重量に対するフィルム内に含まれる粒子の含有量が0.3重量%未満であることを特徴とする二軸延伸ポリエステルフィルム。
- 外層Aの炭酸カルシウム粒子の含有量が外層Aの重量に対し0.1〜0.7重量%であり、炭酸カルシウム粒子の平均粒径d50が0.7〜1.5μmである請求項1に記載のポリエステルフィルム。
- 炭酸カルシウム粒子が天然のものではなく合成粒子である請求項1又は2に記載のポリエステルフィルム。
- 非相溶性ポリマー粒子の含有量が、フィルムの全重量に対し0.3重量%未満である請求項1〜3の何れかに記載のポリエステルフィルム。
- 二酸化チタン粒子および/または硫酸バリウム粒子の含有量が、フィルムの全重量に対し0.2重量%未満である請求項1〜4の何れかに記載のポリエステルフィルム。
- 二酸化ケイ素粒子および/または酸化アルミニウム粒子の含有量が、フィルムの全重量に対し0.3重量%未満である請求項1〜5の何れかに記載のポリエステルフィルム。
- フィルムが、炭酸カルシウム粒子およびポリエステル製造における触媒残渣に由来する粒子以外に粒子を含まない請求項1〜6の何れかに記載のポリエステルフィルム。
- 外層Cに意図的に添加される粒子の含有量が、外層Cの重量に対し0.1重量%未満である請求項1〜7の何れかに記載のポリエステルフィルム。
- 外層Cがポリエステル製造における触媒残渣に由来する粒子以外に粒子を含まない請求項1〜8の何れかに記載のポリエステルフィルム。
- 外層A及びCに使用されるポリエステルにおけるイソフタル酸から誘導される繰り返し単位の含有量が、それぞれの外層の重量に対し23重量%未満であり、フィルム全体のポリエステルにおけるシクロヘキサンジメタノールから誘導される繰り返し単位の含有量が、フィルム全体の重量に対し2重量%未満である請求項1〜9の何れかに記載のポリエステルフィルム。
- 外層A及びCに使用されるポリエステルにおいて、エチレングリコール及びテレフタル酸から誘導される繰り返し単位以外の繰り返し単位の含有量が2重量%未満であるか、又は上記ポリエステルが純粋なテレフタル酸を使用した製法(PTA法)で製造されている請求項1〜10の何れかに記載のポリエステルフィルム。
- 外層A及びCに使用されるポリエステルが、重縮合触媒としてチタン化合物を使用して及び/又はエステル交換触媒としてマグネシウム化合物あるいはマンガン化合物を使用して製造されている請求項1〜11の何れかに記載のポリエステルフィルム。
- 再生材料の含有量が、全ての層における押出し成形物の総重量に対し70重量%未満であり、フィルムの黄変指数YIDが3.0未満である請求項1〜12の何れかに記載のポリエステルフィルム。
- 少なくとも1層のベース層Bと、ベース層Bに対しそれぞれ反対側に配置される粗面を有する外層A及び平滑な面を有する外層Cとの少なくとも3層から成る二軸延伸ポリエステルフィルムであって、当該フィルムは、(1)透明度が80〜95%、(2)ヘーズが7%未満、(3)フィルム総厚みが12〜75μm、(4)平滑な面を有する外層Cの表面粗度Saが25nm未満で且つSpが500nm未満であり、(5)平滑な面を有する外層Cの厚さが1μm以上であり、(6)粗面を有する外層Aの表面粗度Saが25nm以上で且つSpが500nm以上であり、(7)330〜400nmの波長における透過率がこの波長範囲の全てにおいて50%を超えることを特徴とする二軸延伸ポリエステルフィルム。
- 請求項1〜14に記載のポリエステルフィルムの製造方法であって、当該製造方法は(1)個々の層のポリエステルまたはポリエステル混合物を複数の押出し機内で圧力をかけ、溶融流動可能にする工程と、(2)溶融体を共押出しダイから押出して溶融フラットフィルムを形成する工程と、(3)溶融フラットフィルムを冷却ロール上および1つ以上の引取りロール上で冷却し、冷却固化されたプレフィルムを得る工程と、(4)プレフィルムを二軸延伸する工程とから成り、当該二軸延伸フィルムの外層Aが炭酸カルシウム粒子を含有し、外層Cがその重量に対し0.1重量%未満の粒子を含有し、各層を構成する全てのポリエステルは、繰り返し単位として2,6−ナフタレンジカルボン酸から誘導される単位を含まず、フィルムの全重量に対するフィルム内に含まれる粒子の含有量が0.3重量%未満であることを特徴とするポリエステルフィルムの製造方法。
- 家具表面の表面特性を供給する加工フィルムとしての請求項1〜14に記載のフィルムの使用方法。
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WO2022168702A1 (ja) * | 2021-02-03 | 2022-08-11 | 東洋紡株式会社 | 二軸配向ポリエステルフィルム及びその製造方法 |
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DE102016205913A1 (de) * | 2016-04-08 | 2017-10-12 | Mitsubishi Polyester Film Gmbh | Biaxial orientierte Polyesterfolie für die Metalllaminierung |
DE102021134261A1 (de) | 2021-12-22 | 2023-06-22 | Mitsubishi Polyester Film Gmbh | Transparente einseitig glatte Polyesterfolie mit Polymethylsilsesquioxan basierten Partikeln |
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JP6898726B2 (ja) | 2021-07-07 |
EP3178651A1 (de) | 2017-06-14 |
KR20170063403A (ko) | 2017-06-08 |
US11034127B2 (en) | 2021-06-15 |
US20170151746A1 (en) | 2017-06-01 |
DE102015120760A1 (de) | 2017-06-01 |
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