JP2022525078A - 色を低減させた高効率赤外線反射体 - Google Patents
色を低減させた高効率赤外線反射体 Download PDFInfo
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- JP2022525078A JP2022525078A JP2021554565A JP2021554565A JP2022525078A JP 2022525078 A JP2022525078 A JP 2022525078A JP 2021554565 A JP2021554565 A JP 2021554565A JP 2021554565 A JP2021554565 A JP 2021554565A JP 2022525078 A JP2022525078 A JP 2022525078A
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Abstract
Description
いくつかの実施形態では、意図的に極めて色鮮やかな外観を有する赤外線反射フィルムを提供することが望ましい場合がある。本明細書に記載されている他の赤外線反射フィルムについては、赤外線反射フィルムは、複数の光学的繰り返し単位を有する多層光学コアを含み、各光学的繰り返し単位は、第1の複屈折ポリマー層及び第2のポリマー層を含み、赤外線反射フィルムは、多層光学コアの主表面に隣接して配置された、接着剤層ではない可視光吸収層を含む。複数の光学的繰り返し単位はそれぞれ、光学的厚さを有し、複数の光学的繰り返し単位の光学的厚さは、複数の光学的繰り返し単位が左帯域エッジ及び右帯域エッジを有する反射帯域を呈するように構成されており、反射帯域は入射角に応じてシフトし、60度の入射角で、左帯域エッジは750nm以下である。
フィルムの反射スペクトルは、偏角反射率を測定するためのサンプルの自動回転及び測定を可能にするTotal Absolute Measurement System(TAMS)アクセサリモジュール(モデル#L6310240)を使用して、PerkinElmer LAMBDA 1050分光計(Watham,Mass.)において測定された。次いで、色値が、各偏角測定スペクトルについて計算された。その結果を以下に報告する。全ての色値は、D65光源を使用して測定される。
反射スペクトル/色値は反射色の光学モデルから得られた。光学フィルム積層体は、数学的に記載され、材料A(PET)の各1-d層と、材料B(CoPMMA)の交互の1-d層とが互いに組み合わされたポリマー多層構築からなった。最初のA/B層対の位相厚さは、1/2λ0(波長)として規定され、λ0は一般に850nm付近である。隣接するA/B層対は、1/2λiの位相厚さを有するように調節された物理的厚さを有し、λiはλよりも漸増的に大きい。更に隣接するA/B層対は、1/2λnの位相厚さを有する最後のA/B層対に達するまで、光学フィルム積層体全体を通して1/2λi+1等であるように調節された位相厚さを有し、ここで、λnは約1160nmである。演算実施例の全てについて、フィルム積層体は、単調で線形のA/B層対厚さプロファイルにおける112個のA/B層対からなった。加えて、各A/B層対内では、A層及びB層の両方は、1/4λiの個々の位相厚さを有し、いわゆる1/4波長構成を作り出す。上述した干渉構造のこのような構成は、奇数次高調波のみで共振反射帯域を形成する。二軸延伸PET(A)及び非晶質CoPMMA(B)に適当な屈折率値は、以下の表1に示す。光学フィルム積層体及びその関連する位相厚さを演算的に形成するために使用される屈折率値は、表1の633nmの波長の欄にある値である。他の実施例は、λ0が800nmにほぼ等しい又は約700nmにほぼ等しいフィルム積層体構造を有してもよい。112個のA/B層対を有する光学フィルム積層体の上に、入射光に面する方向で、(可視波長で吸収する)吸収層が演算的に配置され得る。この吸収層の屈折率の実数部及び虚数部も表1に示す。
多層フィルムが作製され、保護コーティング及び接着剤がフィルムの両側に適用された。得られたフィルムは、軸上性能及び軸外性能について試験された。
軸上光学測定及び軸外光学測定
サンプルの接着剤コーティングされた側を3mmの透明なソーダ石灰フロートガラスに適用することにより、光学データが生成された。次いで、これらのラミネートは、Perkin Elmer Lambda 950 UV/VIS Spectrometerを使用して、透過及び反射スペクトルについて測定された。様々な角度での反射スペクトルを取得するために、Universal Reflectance Accessory(URA)モジュールがインストールされた。次いで、スペクトルデータは、Lawrence Berkeley National Labs製のOptics 5及びWindows 5ソフトウェアパッケージによって分析された。
Claims (25)
- 赤外線反射フィルムであって、
複数の光学的繰り返し単位を有する多層光学コアであって、各光学的繰り返し単位が、第1の複屈折ポリマー層及び第2のポリマー層を含む、多層光学コアと、
前記多層光学コアの主表面に隣接して配置された、接着剤層ではない可視光吸収層と、を備え、
前記複数の光学的繰り返し単位がそれぞれ、光学的厚さを有し、
前記複数の光学的繰り返し単位の前記光学的厚さは、前記複数の光学的繰り返し単位が、左帯域エッジ及び右帯域エッジを有する反射帯域を呈するように構成されており、
前記反射帯域が、入射角に応じてシフトすると共に最大色シフトをもたらし、前記最大色シフトは、5度刻みで測定される0~85度の入射角の範囲にわたる、L*a*b*色空間における反射色の2点間の明度を無視した最大距離であり、
60度の入射角で、前記左帯域エッジが750nm以下であり、
前記可視光吸収層を伴い前記可視光吸収層を通した場合の前記最大色シフトが、前記可視光吸収層を伴わない場合の前記最大色シフトと比較して、少なくとも25%低減する、赤外線反射フィルム。 - 前記可視光吸収層を伴い前記可視光吸収層を通した場合の前記最大色シフトが、少なくとも50%低減する、請求項1に記載の赤外線反射フィルム。
- 0度入射での前記左帯域エッジが850nm未満である、請求項1に記載の赤外線反射フィルム。
- 0度入射での前記左帯域エッジが800nm未満である、請求項1に記載の赤外線反射フィルム。
- 0度入射での前記左帯域エッジが750nm未満である、請求項1に記載の赤外線反射フィルム。
- 前記第1の複屈折ポリマーが、ポリエチレンテレフタレート又はそのコポリマーである、請求項1に記載の赤外線反射フィルム。
- 前記第2のポリマーが、ポリ(メチルメタクリレート)又はそのコポリマーである、請求項1に記載の赤外線反射フィルム。
- ラミネートであって、
請求項1に記載の赤外線反射フィルムと、
ガラス層と、
光学的に透明な接着剤層と、を備え、
前記赤外線反射フィルムが、前記光学的に透明な接着剤層によって前記ガラス層に取り付けられている、ラミネート。 - 第2のガラス層及び第2の光学的に透明な接着剤層を更に備え、前記赤外線反射フィルムが、前記第2の光学的に透明な接着剤層によって前記第2のガラス層に取り付けられている、請求項8に記載のラミネート。
- 前記光学的に透明な接着剤層がポリビニルブチラールを含む、請求項8又は9に記載のラミネート。
- 前記吸収層が可視光吸収材料を含む、請求項1に記載の赤外線反射フィルム。
- 前記吸収層が、それらのスペクトル範囲にわたる平均で400~800nmの範囲の光を800~1200nmの範囲の光よりも多く吸収する材料を含む、請求項1に記載の赤外線反射フィルム。
- 前記吸収層が透明な金属酸化物を含む、請求項1に記載の赤外線反射フィルム。
- 前記吸収層がカーボンブラックを含む、請求項1に記載の赤外線反射フィルム。
- 前記吸収層が、少なくとも2つの異なる吸収材料を含む、請求項1に記載の赤外線反射フィルム。
- 前記可視光吸収層が、前記多層光学コアにラミネートされたポリマーフィルム層である、請求項1に記載の赤外線反射フィルム。
- 前記可視光吸収層が、前記多層光学コア内に共押出しされたスキン層である、請求項1に記載の赤外線反射フィルム。
- 前記多層光学コアの第2の主表面に隣接する第2の吸収層を更に備える、請求項1に記載の赤外線反射フィルム。
- 前記第1の吸収層と前記第2の吸収層とが、異なる可視光透過率を有する、請求項18に記載の赤外線反射フィルム。
- 前記第1の吸収層と前記第2の吸収層とが、同じ可視光透過率を有する、請求項18に記載の赤外線反射フィルム。
- 赤外線反射フィルムであって、
複数の光学的繰り返し単位を有する多層光学コアであって、各光学的繰り返し単位が、第1の複屈折ポリマー層及び第2のポリマー層を含む、多層光学コアと、
前記多層光学コアの主表面に隣接して配置された、接着剤層ではない可視光吸収層と、を備え、
前記複数の光学的繰り返し単位がそれぞれ、光学的厚さを有し、
前記複数の光学的繰り返し単位の前記光学的厚さは、前記複数の光学的繰り返し単位が、左帯域エッジ及び右帯域エッジを有する反射帯域を呈するように構成されており、
前記反射帯域が入射角に応じてシフトし、
60度の入射角で、前記左帯域エッジが750nm以下であり、
入射角8°に対する入射角50°での400nm~700nmの可視光の反射比が少なくとも150%である、赤外線反射フィルム。 - 入射角8°に対する入射角50°での400nm~700nmの可視光の前記反射比が少なくとも200%である、請求項21に記載の赤外線反射フィルム。
- 入射角8°に対する入射角50°での400nm~700nmの可視光の前記反射比が少なくとも300%である、請求項21に記載の赤外線反射フィルム。
- 前記可視光吸収層がカーボンブラックを含む、請求項21に記載の赤外線反射フィルム。
- 内面及び外面を有し、請求項21に記載の赤外線反射フィルムを備える窓であって、前記赤外線反射フィルムの前記可視光吸収層が、前記内面に面する、窓。
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CN103038678B (zh) | 2010-06-30 | 2015-06-03 | 3M创新有限公司 | 具有空间选择性双折射减小的漫反射光学膜 |
WO2012173170A1 (ja) | 2011-06-17 | 2012-12-20 | 帝人株式会社 | 反射偏光フィルム、それからなる液晶表示装置用光学部材および液晶表示装置 |
US9551818B2 (en) * | 2011-10-20 | 2017-01-24 | 3M Innovative Properties Company | Apodized broadband partial reflectors having differing optical packets |
WO2015134824A2 (en) | 2014-03-07 | 2015-09-11 | 3M Innovative Properties Company | Durable extruded dyed polyester films |
US9823395B2 (en) * | 2014-10-17 | 2017-11-21 | 3M Innovative Properties Company | Multilayer optical film having overlapping harmonics |
KR20190009426A (ko) | 2014-12-30 | 2019-01-28 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | 반사 편광기 및 보상 필름을 포함하는 광학 적층물 |
CN111856635B (zh) * | 2015-12-18 | 2022-08-09 | 3M创新有限公司 | 宽带可见光反射器 |
-
2020
- 2020-03-11 KR KR1020217032089A patent/KR20210128008A/ko unknown
- 2020-03-11 JP JP2021554565A patent/JP2022525078A/ja active Pending
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- 2020-03-11 WO PCT/IB2020/052133 patent/WO2020183384A1/en unknown
- 2020-03-11 US US17/310,542 patent/US11346987B2/en active Active
- 2020-03-11 CN CN202080014227.5A patent/CN113424083B/zh active Active
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2022
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US11346987B2 (en) | 2022-05-31 |
US20220252772A1 (en) | 2022-08-11 |
US20220043195A1 (en) | 2022-02-10 |
EP3938820A4 (en) | 2022-12-14 |
KR20210128008A (ko) | 2021-10-25 |
CN113424083A (zh) | 2021-09-21 |
EP3938820A1 (en) | 2022-01-19 |
CN113424083B (zh) | 2023-05-16 |
TW202102882A (zh) | 2021-01-16 |
WO2020183384A1 (en) | 2020-09-17 |
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