JP2017181528A - 光拡散板及び照明器具 - Google Patents
光拡散板及び照明器具 Download PDFInfo
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Abstract
Description
図1を用いて、本発明の実施形態に係る光拡散板1を説明する。
[照明器具]
図2を用いて、本発明の実施形態に係る照明器具10を説明する。
(実施例1)
アクリル樹脂膜3に用いられるアクリル樹脂として、ガラス転移温度が30℃であるアクリル樹脂(DIC株式会社製アクリディック A−9510)を用い、アクリル樹脂粒子4として、平均粒子径8μm、細孔径20nmの架橋ポリメタクリル酸メチル多孔質球状微粒子(積水化成品工業株式会社製 MBP−8)を用いた。また、硬化剤として、加水分解性シリル基含有シリコン化合物(DIC株式会社製アクリディック FZ−523)を用いた。また、熱可塑性樹脂基材2として、ポリカーボネート(三菱エンジニアリングプラスチック株式会社製ユーピロン H−4000)を用いた。
(実施例2)
アクリル樹脂膜3に用いられるアクリル樹脂として、ガラス転移温度が50℃であるアクリル樹脂(DIC株式会社製アクリディック A−9540)を用い、硬化剤として、加水分解性シリル基含有シリコン化合物(DIC株式会社製アクリディック FZ−521)を用い、熱可塑性樹脂基材2として、スチレン・アクリロニトリル共重合体(ダイセルポリマー株式会社製 セビアン−N020)を用いた以外は、実施例1と同様に光拡散板1を製造した。
(実施例3)
アクリル樹脂膜3に用いられるアクリル樹脂として、ガラス転移温度が30℃であるアクリル樹脂(DIC株式会社製アクリディック A−9510)と、ガラス転移温度が5
0℃であるアクリル樹脂(DIC株式会社製アクリディック A−9540)とを質量比で7:3となるように混合した樹脂を用いた以外は、実施例1と同様に光拡散板1を製造した。
(実施例4)
アクリル樹脂膜3に用いられるアクリル樹脂100質量部に対して、アクリル樹脂粒子4を100質量部混合したこと、調整した樹脂組成物の塗料を基材に塗布膜厚3μmになるように塗布したこと以外は、実施例1と同様に光拡散板1を製造した。
(実施例5)
アクリル樹脂膜3に用いられるアクリル樹脂100質量部に対して、アクリル樹脂粒子4を20質量部混合したこと、調整した樹脂組成物の塗料を基材に塗布膜厚10μmになるように塗布したこと以外は、実施例1と同様に光拡散板1を製造した。
(実施例6)
アクリル樹脂粒子4として、平均粒子径8μmの架橋ポリメタクリル酸メチルの無孔質球状微粒子(積水化成品工業株式会社製 MBX−8)を用いた以外は、実施例1と同様に光拡散板1を製造した。
(実施例7)
調整した樹脂組成物の塗料を基材に塗布膜厚20μmになるように塗布したこと以外は、実施例1と同様に光拡散板1を製造した。
(実施例8)
アクリル樹脂膜3に用いられるアクリル樹脂100質量部に対して、アクリル樹脂粒子4を5質量部混合したこと以外は、実施例1と同様に光拡散板1を製造した。
(比較例1)
アクリル樹脂膜3に用いられるアクリル樹脂として、ガラス転移温度が90℃であるアクリル樹脂(DIC株式会社製アクリディック BZ−1160)を用いた以外は、実施例1と同様に光拡散板1を製造した。
(比較例2)
アクリル樹脂膜3に用いられるアクリル樹脂として、ガラス転移温度が15℃であるアクリル樹脂(DIC株式会社製アクリディック A−9521)を用い、硬化剤として、加水分解性シリル基含有シリコン化合物(DIC株式会社製アクリディック FZ−521)を用いた以外は、実施例1と同様に光拡散板1を製造した。
(評価)
(光拡散性評価)
ヘーズメーター(日本電色工業株式会社製「NDH2000」)を用いて、実施例1〜8、比較例1〜2の光拡散板について、全光線透過率を測定した。測定は光拡散層側を光源に向けて測定した。全光線透過率が60%以上あり、かつ、光均一性がありランプイメージがない状態であれば、優れた器具効率と光均一性を両立できていると言えるため、以下のような判定基準とした。
・判定基準
65%以上:〇
60〜65%:△
60%未満:×
(外観評価)
パナソニック社製スクエアベースライトXL524PFULT9を用い、実施例1〜8、比較例1〜2の光拡散板1について、光源イメージの隠蔽性を目視により確認した。光拡散板1はこの器具に合うサイズ(350×350mm)に切り出し、測定は光拡散層側を光源に向けて、以下のような判定基準で評価した。
・判定基準
A:光源形状が確認できず発光が均一である。
(一次密着性評価)
JIS K−5600−5−6に準じて、実施例1〜8、比較例1〜2の光拡散板1における熱可塑性樹脂基材2とアクリル樹脂膜3の密着性を碁盤目試験により測定した。
(二次密着性評価)
沸騰水に実施例1〜8、比較例1〜2の光拡散板1を試験サンプルとして30分間浸漬後、を取り出して乾燥し、JIS K−5600−5−6に準じて熱可塑性樹脂基材2とアクリル樹脂膜3の密着性を碁盤目試験により測定した。
(表面硬度評価)
JIS K5600(塗料一般試験方法)における引っかき硬度(鉛筆法)に準じて、実施例1〜8、比較例1〜2の光拡散板1における光拡散層5の硬度を測定した。
(耐傷性評価)
スチールウール(等級:#0000番)を用いて100g/cm2の荷重にて10往復、実施例1〜8、比較例1〜2の光拡散板1における光拡散層5を磨耗し、磨耗後の被膜表面における傷の有無を評価した。判定基準は以下のようにした。
・判定基準
○:目視により傷が確認できない、あるいは傷が2本以下である。
2 熱可塑性樹脂基材
3 アクリル樹脂膜
4 アクリル樹脂粒子
5 光拡散層
21 一方の面
10 照明器具
11 照明基板
12 LED光源
Claims (8)
- 熱膨張係数が4×10−5〜8×10−5/Kである熱可塑性樹脂基材と、
前記熱可塑性樹脂基材の表面に設けられ、ガラス転移温度が30〜50℃である一又は二以上のアクリル樹脂を含むアクリル樹脂膜と、前記アクリル樹脂膜に複合された平均粒子径が1〜15μmであるアクリル樹脂粒子と、を含む光拡散層と、
を有する、光拡散板。 - 前記光拡散層が、前記アクリル樹脂の合計量100質量部に対して、前記アクリル樹脂粒子を10〜300質量部含む、請求項1に記載の光拡散板。
- 前記アクリル樹脂粒子が多孔質である、請求項1又は2に記載の光拡散板。
- 前記多孔質の平均細孔径が10〜100nmである、請求項3に記載の光拡散板。
- 前記アクリル樹脂膜の膜厚が、前記アクリル樹脂粒子の平均粒子径よりも小さい、請求項1〜4のいずれか一項に記載の光拡散板。
- 前記熱可塑性樹脂基材が、ポリカーボネートである、請求項1〜5のいずれか一項に記載の光拡散板。
- 請求項1〜6に記載の光拡散板と、LED光源とを有し、
前記光拡散板の前記熱可塑性樹脂基材側に、前記LED光源の発光面と前記熱可塑性樹脂基材とが向かい合うように前記LED光源が配置された、照明器具。 - 請求項1〜6に記載の光拡散板と、LED光源とを有し、
前記光拡散板の前記光拡散層側に、前記LED光源の発光面と前記光拡散層とが向かい合うように前記LED光源が配置された、照明器具。
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| JP2016062982A JP2017181528A (ja) | 2016-03-28 | 2016-03-28 | 光拡散板及び照明器具 |
| CN201710173070.0A CN107238879A (zh) | 2016-03-28 | 2017-03-22 | 光漫射板和照明器具 |
| US15/467,164 US9815978B2 (en) | 2016-03-28 | 2017-03-23 | Light diffuser and luminaire |
| DE102017106238.6A DE102017106238A1 (de) | 2016-03-28 | 2017-03-23 | Lichtdiffusor und Beleuchtungskörper |
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| JP (1) | JP2017181528A (ja) |
| CN (1) | CN107238879A (ja) |
| DE (1) | DE102017106238A1 (ja) |
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| KR20200088950A (ko) * | 2019-01-15 | 2020-07-24 | 삼성디스플레이 주식회사 | 표시 장치 및 이의 제조 방법 |
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Also Published As
| Publication number | Publication date |
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| US9815978B2 (en) | 2017-11-14 |
| US20170275445A1 (en) | 2017-09-28 |
| DE102017106238A1 (de) | 2017-09-28 |
| CN107238879A (zh) | 2017-10-10 |
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