JP5997132B2 - 再帰反射性物品及びその形成方法 - Google Patents
再帰反射性物品及びその形成方法 Download PDFInfo
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- JP5997132B2 JP5997132B2 JP2013504875A JP2013504875A JP5997132B2 JP 5997132 B2 JP5997132 B2 JP 5997132B2 JP 2013504875 A JP2013504875 A JP 2013504875A JP 2013504875 A JP2013504875 A JP 2013504875A JP 5997132 B2 JP5997132 B2 JP 5997132B2
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/12—Coating on the layer surface on paper layer
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- 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
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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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
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/418—Refractive
-
- 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
-
- 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
- B32B2307/75—Printability
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Description
オーバーレイフィルムはエチレンアクリル酸(EAA)(厚さ0.01cm(4ミル)のフィルムとしてDow Company(Midland,MI)から市販されている商標「Primacor 3440」を、約53インチ(134.6cm)幅及び0.05mm(0.002インチ)厚さのコロナ処理されたポリエチレンテレフタレート(PET)キャリア上にキャスティングすることによって作製された。EAAのペレットは、C.W.Brabender Instruments Inc.(South Hackensack,N.J)から入手可能な1.9cm(3/4インチ)の単一のスクリュー押出成形機内に供給された。押出成形機の温度プロファイルは140℃(284°F)〜175℃(347°F)で溶解温度は約175℃(347°F)であった。溶融樹脂が押出成形機を出るときに、水平ダイ(Extrusion Dies Industries LLC(Chippewa Falls,WI)から市販されている商標「Ultraflex−40」)を通過し、上記のPETキャリア上にキャスティングされた。PETキャリアは約36メートル/分(120ft/分)で移動した。得られるPETキャリア上の溶融オーバーレイフィルムは、ゴムロールと冷却されたスチールバックアップロールとの間に移動され、溶融樹脂を層へと凝固させた。EAA表面は1.5J/cm2のエネルギーでコロナ処理された。
構造化層は構造体を基材層の上に作ることによって調製された。いくつかの実施形態では、構造体は、基材層上のバリア材料(バリア層に使用するための材料)を選択的に適用することによって(例えばパターン印刷、パターンコーティング)作製された。あるいは、バリア材料は剥離層上に適用され、それに続いてバリア材料を含む剥離層が基材へ積層された。いくつかの実施形態では、構造化層は、金型を用いて基材層上へパターンを付与することによって調製された。いくつかの実施例では基材層は接着層である。再帰反射性光学構造体は、構造化層を再帰反射性層に積層することによって調製され、そこでバリア材料はキューブコーナーミクロ構造体に接触した。
再帰反射性層は、異なるロットの材料が使用されたことを除いて上記のように調製された。
放射線重合可能な感圧接着剤(PSA)は、本明細書において参照により組み込まれる米国特許第5,804,610号(Hamer)に記載のように調製された。PSA組成物は、95重量部のイソオクチルアクリレート(IOA)、5重量部のアクリル酸(AA)、0.15重量部のIrgacure 651(Ciba Corporation、現在はBASF Company(NJ)から市販されている)、0.10重量部の4−アクリロイル−オキシ−ベンゾフェノン(ABP)、0.05重量部のイソオクチルチオグリコレート(IOTG)、及び0.4重量部のIrganox 1076(Ciba Corporationから市販されている)を混合することによって作製された。PSA組成物は、0.0635mm厚さの(Pliant Corporation(Dallas,TX)から商標「VA−24」で市販されている)エチレンビニルアセテートコポリマーから作製された、約10cm×5cmのパッケージ内に配置され、熱封止された。PSA組成物は次いで重合された。重合の後、PSA組成物は概して米国特許第5,804,610号に記載のように、10%のTiO2顔料と混合され、4インチ×6インチ(10.2cm×15.2cm)当たり約27グレインの厚さ(11.3mg/cm2)でシリコーン剥離ライナーの上にキャスティングされた。PSAフィルムは次いで、放射架橋工程に供された。
PSA組成物は、モノマー比が90/10 IOA/AAであり、TiO2が使用されていないということを除いて、実施例1〜5に記載されるように調製された。PSA組成物は、0.8グレイン/インチ2(7.95mg/cm2)の厚さでフィルムとしてキャスティングされた。
バリア材料は、UVインクジェットプリンタ及び黄色のインクジェットのインクを使用して、実施例1〜5のシリコーンコーティングされた剥離層の上に印刷された。使用されたインクジェットは100%だった。実施例1〜5に記載されるドットパターンが使用され、これは図6に概略的に示されている。印刷された剥離層7は、以下の表4で詳述される印刷パターンを使用して調製された。
バリア材料は、白色のUV架橋可能なスクリーン印刷インク(3M Company(St.Pal,MN)から商標「9808シリーズ」で市販されている)を、シリコーンコーティングされた剥離層上に、スクリーン印刷(A.W.T.World Trade,Inc.(Chicago,IL)から利用可能なAccu−Print Printerを使用して)することによって作られた。380メッシュスクリーンを使用して、実施例1〜5のドット印刷パターンが使用されて、バリア材料を作製した。印刷された剥離層8は、実施例1〜5の印刷パターンを使用して調製された。
構造化層はエンボスロールを使用して、本明細書に参照により組み込まれる米国特許第6,254,675号(Mikami)に一般的に記載されるように調製された。米国特許第6,254,675号の図4aに示されるように、エンボスロールは、露出した表面を有する、切頭四角柱と、第1のピラミッドの露出した表面上に配置された第2の四角柱と、を有するパターンを提供するようにレーザーで機械加工された。この構造体は、一般的に米国特許第6,254,675号の実施例6に記載されるように、200μmのピッチ、15μmの高さ、及び25μm幅を有した。ポリエチレンの上にシリコーンコーティングを有するポリエチレンコーティングされた紙剥離ライナー、例えばRexam又はInnocoatから入手可能であるようなものは、加熱されたゴムロールと、エンボスロールとの間でエンボス加工され、隆起部を備えるミクロ構造化ライナーを作った。ゴムロールは、110℃の温度まで加熱され、剥離ライナーは、ゴムロールとエンボス加工ロールとの間に入る前に、表面温度110℃まで加熱された。剥離ライナーは、エンボス加工ロールの約半分まで移動させてから冷却缶へ移動させて、ライナーを冷却した。
以下の記載は、実施例10〜13を調製するのに使用された:本明細書に参照により組み込まれる米国特許第6,285,001号(Fleming)に概ね記載されるレーザーアブレーションシステムが使用されて、所定のパターンを高分子フィルムに付与した。レーザーのアブレーションシステムは、248nmの波長でビームを放射するKrFエキシマレーザー、標準的な半導体リソグラフィのマスク技術を使用して製造されたパターン付きマスク、及びそのマスクを通じて基材上に光のパターンの画像を投射する撮像レンズから構成された。5ミル(0.13mm)厚さのポリイミド層から構成された基材は、銅層に取り付けられた。基材は、パターン付き放射線に暴露され、ポリイミド層において得られる構造体は、図4に示されるように六角形チャネルのパターンを含んだ。各六角形は0.731mm幅及び0.832mm長さだった。チャネルの幅、すなわち隣接する六角形のそれぞれ隣接する壁部間の距離は0.212mm(幅d)であり、1つの六角形の中心と隣接する六角形の中心との間の距離は、図4Aに示されるように0.943mm(ピッチD)だった。
再帰反射性層は、比較実施例A1及びA2に記載されるように調製された。
酸/アクリレート−修飾エチレンビニルアセテート(EVA)ポリマー(商標「Bynel 3101」でDow Corning(Michigan,USA)から市販されている)の2層構造体を含む封止層は、共押出によって調製され、ここでは第1層は透明であり、第2層は共押出柱のTiO2の添加により着色された。20重量%の80/20 TiO2/EVAブレンドと混合したBynel 3101のペレットは押出成形機内に供給され、PETキャリア上に0.005cm(2ミル)の厚さで白色フィルムとしてキャストされた。透明層(すなわちTiO2を有さない)は、0.002cm(1ミル)の厚さでフィルムとしてキャスティングされ、約1J/cm2のエネルギーでコロナ処理された。
構造化封止層が低屈折率コーティング材料を用いて再帰反射層にコーティングされることを除き、封止層は実施例10に記載されるように調製された。
PSAフィルムは実施例6に記載のとおり調製された。構造化接着フィルムは、実施例10に記載のとおりポリイミド層に対して接着フィルムを押し付けることによって得られた。
実施例11の低屈折率コーティング組成物が構造化接着剤にコーティングされることを除き、構造化接着フィルムは実施例12に記載されるように調製された。再帰反射性光学構造体は、コーティングされた構造化接着フィルムを再帰反射性層に室温にて、ハンドローラーを用いて積層することによって調製され、そこでフィルムの接着面はキューブコーナーミクロ構造体に接触した。
3M Company(St.Paul,MN)によって商標「Diamond Grade 3910」で市販されている封止されたプリズム状の再帰反射性シート材が入手された。
3M Companyによって商標「License Plate Sheeting Series 4770」で市販されているビーズの再帰反射性シート材が入手された。
実施例10記載されるように調製された封止層が入手された。
以下の記載は比較実施例F、G、及びH、並びに実施例14〜19の調製に使用された:キューブ構造体が、101.6マイクロメートル(0.004インチ)のピッチ、すなわち主な溝部間隔を備える、3セットの交差する溝部を有したことを除き、再帰反射性層は「再帰反射性層の調製」で記載されるように調製された。交差する溝部は、58、58、64度の角度を含んでキューブコーナーベース三角形を形成し、49.6マイクロメートル(0.00195インチ)であるキューブコーナー要素の高さとなった。主な溝部間隔は、ベース三角形の2つの58度のベース角度を形成する溝部間の溝部の間隔として定義される。
Claims (3)
- 主面に対して反対側にある構造化面を集合的に形成する複数のキューブコーナー要素を含む再帰反射性層と、
第1領域及び第2領域を有する封止層であって、前記第1領域はバリア層を含み、前記第2領域は前記構造化面と接触し、前記第2領域が前記第1領域を包囲して少なくとも1つのセルを形成している、封止層と、
前記第1領域の前記バリア層と前記再帰反射性層の前記構造化面との間の低屈折率層とを備え、
前記低屈折率層の屈折率は、前記再帰反射性層の屈折率よりも低く、
前記封止層は、透明でない感圧接着剤を含み、
前記セルは、前記セルの面積を前記セルの外周長さで除した特徴的なセル寸法を有し、該特徴的なセル寸法が1000マイクロメートル未満である、再帰反射性物品。 - 主面に対して反対側にある構造化面を含む再帰反射性層と、
前記構造化面の少なくとも一部分と接触して、入射光を実質的に再帰反射しない光学的不活性領域を形成する、封止層と、
前記封止層に設けられる少なくとも1つのバリア層と、
前記少なくとも1つのバリア層と前記再帰反射性層の前記構造化面との間の少なくとも1つの低屈折率層であって、入射光を再帰反射する光学的活性領域を形成する少なくとも1つの低屈折率層とを含み、
前記低屈折率層の屈折率は、前記再帰反射性層の屈折率よりも低く、
前記封止層は、透明でない感圧接着剤を含み、
前記光学的活性領域は、前記光学的不活性領域に包囲されて少なくとも1つのセルを形成し、
前記セルは、前記セルの面積を前記セルの外周長さで除した特徴的なセル寸法を有し、該特徴的なセル寸法が1000マイクロメートル未満である、再帰反射性物品。 - 再帰反射性物品を形成する方法であって、
主面に対して反対側にある構造化面を含む再帰反射性層を提供する工程と、
第1領域及び第2領域を有する封止層を適用する工程であって、前記第1領域はバリア層を含み、前記第2領域は前記構造化面と接触し、前記第2領域が前記第1領域を包囲して少なくとも1つのセルを形成する、封止層を適用する工程とを備え、
前記封止層は、透明でない感圧接着剤を含み、
前記バリア層が、前記第1領域と前記再帰反射性層の前記構造化面との間に、前記再帰反射性層の屈折率よりも低い屈折率を有する低屈折率層を形成し、
前記セルは、前記セルの面積を前記セルの外周長さで除した特徴的なセル寸法を有し、該特徴的なセル寸法を1000マイクロメートル未満とする、方法。
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US20130135731A1 (en) | 2013-05-30 |
US9618663B2 (en) | 2017-04-11 |
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KR101954456B1 (ko) | 2019-03-05 |
US20170184763A1 (en) | 2017-06-29 |
EP2558290A1 (en) | 2013-02-20 |
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US10132969B2 (en) | 2018-11-20 |
EP2558290B1 (en) | 2019-01-23 |
WO2011129833A1 (en) | 2011-10-20 |
US20190086590A1 (en) | 2019-03-21 |
KR20130067272A (ko) | 2013-06-21 |
EP2558290A4 (en) | 2014-01-22 |
US10557976B2 (en) | 2020-02-11 |
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