JP2021530382A - 適合性遮蔽フィルム - Google Patents
適合性遮蔽フィルム Download PDFInfo
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- JP2021530382A JP2021530382A JP2021502872A JP2021502872A JP2021530382A JP 2021530382 A JP2021530382 A JP 2021530382A JP 2021502872 A JP2021502872 A JP 2021502872A JP 2021502872 A JP2021502872 A JP 2021502872A JP 2021530382 A JP2021530382 A JP 2021530382A
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- 229920006254 polymer film Polymers 0.000 claims abstract description 25
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Abstract
Description
[実施例]
遮蔽フィルムを有する、及び有していないフィルム積層体を作製し、熱成形した。得られた形成形を、欠陥について検査した。これらの実施例は、単に例示目的のみのものであり、添付の特許請求の範囲を限定することを意味するものではない。以下の略語を本明細書で使用する。in=インチ、cm=センチメートル、℃=摂氏温度、°F=華氏温度。
目視検査試験
熱成形した部品を、視覚的欠陥について、標識面点灯ボックスを使用して評価した。点灯ボックス内で使用する白色LEDを、99インチ2(639cm2)の表面積にわたって平均光束発散度が標識面拡散体で2351ルクスとなるように、設定した。
手順:
1.熱成形した部品の裏側を目視評価した(評価基準を参照されたい)。
2.熱成形した部品を、前側が外に向いた状態で、点灯ボックス上に載せた。部品の前側について、頂部、側部、及び側部の下方の0.5インチ(1.27cm)の着地領域(熱成形した部分を標識に取り付けているとき、典型的には覆われている平坦領域)を含めて、またダウンウェブ、クロスウェブ、及び斜角から、反射光にて目視評価した(評価基準を参照されたい)。
3.点灯ボックスのLEDを点灯し、熱成形した部品が覆っていない点灯ボックス表面の領域を遮蔽し、全ての光を遮断したことについて確かめた。部品の前側について、頂部、側部、及び側部の下方の0.5インチ(1.27cm)の着地領域を含めて、またダウンウェブ、クロスウェブ、及び斜角から、透過光にて評価した(評価基準を参照されたい)。
4.熱成形された部品は、評価基準のいずれかを観察した場合、目視検査験に不合格であった。
5.評価基準:
i亀裂、穴、気泡、しわ、融解、焼損、又は汚染などの物理的欠点。
ii.熱成形後にフィルムの浮き上がりによって生じた、影、気泡、又は不均一性。これには、基材からの透光性部の浮き上がり(気泡、適用前の基材の不適正な表面の生成によって、又は成形型が離型していないことによって生じたもの)、及び/又はフィルム層間での浮き上がり(影、構造体内)が含まれる。
iii.部品の頂部と側部との間の彩度の不均一性(すなわち、頂部は側部よりもかなり暗く見え、側部での着色が不規則に見える)。
評価基準の各々を、図3に示す。
(実施例)
全ての基材を乾燥し、洗浄し、3M Thermoforming Instruction Bulletin5.16(3M Company(St.Paul,MN))にて指定した推奨の熱成形フィルム適用手順を使用して、適用した。実施例の作製に使用した成形型を、MDF(Medium Density Fiberboard)から製作した。成形型の形状は、8インチ×8インチ(20.3cm×20.3cm)の基部及び6.75インチ×6.75インチ(17.1cm×17.1cm)の頂部を有する、2.25インチ(5.71cm)の深さの台形切頭体であった。成形型の4辺について、様々な抜き勾配及び縁形状を評価することができるように設計した。側部A及びBの抜き勾配は6.4度であり、縁部半径は0.25インチ(0.64cm)であった。側部C及びDの抜き勾配は20度であり、縁部半径は9/32インチ(0.71cm)であった。角部のうちの1つは、頂部から観察したとき、成形型の頂部表面を基準にして約2インチ(5.08cm)の丸形であり、丸形の基部まで20度の抜き勾配を保持していた。成形型を、図4A及び図4Bに示す。
図4Cは、積層した層を示す。成形型と接触したフィルムは、遮蔽フィルム層(得られた熱成形部品の裏側)であった。基材は、積層体の最外表面上であった(得られた熱成形部品の前側)。
実施例1.(E1)
フィルム適用のための3M Translucent Thermoforming Instruction Bulletin5.16(3M Company(St.Paul,MN))手順を使用して、B1、D1、及びT1を、S1に積層した。次いで、構造体を成形型の頂部の上に載せ、380°F〜420°F(193℃〜215℃)で熱成形した。E1を評価すると、目視検査試験に合格し、D1及びT1を首尾よく保護していた。E1は、断裂も、気泡も、焼損も、引き裂き欠陥もなく、成形型の成形性又は再現性が実質的に完全なものに達していた。結果を、図5及び以下の表2に示す。
実施例2.(E2)
E1にて使用した同じプロセスを使用して、B1、D2、及びT1を、S1に積層した。構造体を、380°F〜420°F(193℃〜215℃)で熱成形した。E2評価すると、目視検査試験に合格し、D2及びT1を首尾よく保護していた。E2は、断裂も、気泡も、焼損も、引き裂き欠陥もなく、成形型の成形性又は再現性が完全なものに達していた。結果を、以下の表2に示す。
実施例3.(E3)
E1にて使用した同じプロセスを使用して、B2、D2、及びT1を、S2に積層した。構造体を、360°F〜385°F(182℃〜196℃)で熱成形した。E3を評価すると、目視検査試験に合格し、D2及びT1を首尾よく保護していた。E3は、断裂も、気泡も、焼損も、引き裂き欠陥もなく、成形型の成形性又は再現性が完全なものに達していた。結果を、以下の表2に示す。
実施例4.(E4)
E1にて使用した同じプロセスを使用して、B2、D2、及びT1を、S3に積層した。構造体を、360°F〜385°F(182℃〜196℃)で熱成形した。E4を評価すると、目視検査試験に合格し、D2及びT1を首尾よく保護していた。E4は、断裂も、気泡も、焼損も、引き裂き欠陥もなく、成形型の成形性又は再現性が完全なものに達していた。結果を、以下の表2に示す。
実施例5.(E5)
E1にて使用した同じプロセスを使用して、B1及びT1を、S1に積層した。構造体を、380°F〜420°F(193℃〜215℃)で熱成形した。E5を評価すると、目視検査試験に合格し、T1を首尾よく保護していた。E5は、断裂も、気泡も、焼損も、引き裂き欠陥もなく、成形型の成形性又は再現性が完全なものに達していた。結果を、以下の表2に示す。
比較例1.遮蔽フィルムなし(CE1)
E1にて使用した同じプロセスを使用して、D2及びT1を、S1に積層した。構造体を、380°F〜420°F(193℃〜215℃)で熱成形した。CE1は、目視検査試験に不合格であった。CE1は、断裂、焼損、及び引き裂き欠陥を有していた。結果を、図6及び以下の表2に示す。
Claims (20)
- 剛性フィルム構造体を熱成形する方法であって、
剛性フィルム構造体を成形型に適用することと、
前記剛性フィルム構造体を、前記成形型に適合するまで、加熱することと、を含み、
前記剛性フィルム構造体が、
剛性ポリマーフィルム層、
光調節フィルム層、及び
遮蔽フィルム層を含み、
前記遮蔽フィルムが、ポリメチルメタクリレート(PMMA)を含み、
前記遮蔽フィルム層が、前記成形型の表面に接触する、方法。 - 前記剛性ポリマーフィルム層が、ポリカーボネート、アクリル、ポリエチレンテレフタレート、及びポリエチレンテレフタレートグリコールのうちの少なくとも1つを含む、請求項1に記載の方法。
- 前記剛性フィルム構造体の反対側の前記成形型の側に、真空を適用する工程、を更に含む、請求項1に記載の方法。
- 前記光調節フィルム層が、ビニルフィルムである、請求項1に記載の方法。
- 前記光調節フィルム層が、印刷されたインク層を更に含む、請求項1に記載の方法。
- 前記光調節フィルム層が、透光性を有する、請求項1に記載の方法。
- 前記光調節フィルム層が、拡散体として機能する、請求項1に記載の方法。
- 前記遮蔽フィルム層が、光学的に不活性である、請求項1に記載の方法。
- 前記遮蔽フィルム層が、ポリメチルメタクリレートからなる、請求項1に記載の方法。
- 前記遮蔽フィルム層が、100マイクロメートル未満の厚さを有する、請求項1に記載の方法。
- 熱成形プロセスに使用するための剛性フィルム構造体であって、
剛性ポリマーフィルム層、
光調節フィルム層、及び
ポリメチルメタクリレート(PMMA)を含む遮蔽フィルム層、を含み、
前記遮蔽フィルム層が、成形型の表面に接触するように構成され、前記剛性フィルム構造体は、加熱したときに前記成形型の形状に適合する、剛性フィルム構造体。 - 前記剛性ポリマーフィルム層が、ポリカーボネート、ポリエチレンテレフタレート、又はアクリルのうちの少なくとも1つを含む、請求項11に記載の剛性フィルム構造体。
- 前記光調節フィルム層が、ビニルフィルムである、請求項11に記載の剛性フィルム構造体。
- 前記光調節フィルム層が、印刷されたインク層を更に含む、請求項11に記載の剛性フィルム構造体。
- 前記光調節フィルム層が、透光性を有する、請求項11に記載の剛性フィルム構造体。
- 前記光調節フィルム層が、拡散体として機能する、請求項11に記載の剛性フィルム構造体。
- 前記遮蔽フィルム層が、光学的に不活性である、請求項11に記載の剛性フィルム構造体。
- 前記遮蔽フィルム層が、150マイクロメートル未満の厚さを有する、請求項11に記載の剛性フィルム構造体。
- 前記遮蔽フィルム層が、100マイクロメートル未満の厚さを有する、請求項11に記載の剛性フィルム構造体。
- 前記遮蔽フィルム層が、ポリメチルメタクリレートからなる、請求項11に記載の剛性フィルム構造体。
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