JPWO2007145083A1 - 近赤外線領域光反射性能を有する暗色シート状物 - Google Patents
近赤外線領域光反射性能を有する暗色シート状物 Download PDFInfo
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Abstract
Description
前記表面層(A)が380〜720nmの波長領域において90%以上の日射吸収率を有し、720〜1500nmの近赤外線領域において30%未満の日射吸収率を有し、且つ720〜1500nmの近赤外線領域において50%以上の日射透過率を有する、暗色を呈する層であり、
前記反射層(B)が380〜1500nmの波長領域において85%以上の日射反射率を有する層であり、且つ、
前記表面層(A)と前記反射層(B)とを積層したシート状物の720〜1500nmの近赤外線領域における日射反射率が70%以上であるものである。
前記表面層(A)が380〜720nmの波長領域において90%以上の日射吸収率を有し、720〜1500nmの近赤外線領域において30%未満の日射吸収率を有し、且つ720〜1500nmの近赤外線領域において50%以上の日射透過率を有する、暗色を呈する層であり、
前記反射層(B)が380〜1500nmの波長領域において85%以上の日射反射率を有する層であり、且つ、
前記表面層(A)と前記反射層(B)とを積層したシート状物の720〜1500nmの近赤外線領域における日射反射率が70%以上であるものである。
ポリ塩化ビニル系樹脂1:新第一塩ビ社製「PX−QHPN」
ポリ塩化ビニル系樹脂2:鐘淵化学工業社製「PSH−23」
熱可塑性オレフィン系エラストマー樹脂1:三井化学社製「ミラストマー N-8030」
ウレタン系樹脂1:大日精化工業社製「レザミン NE-8875」
可塑剤:ジイソノニルフタレート、積水化学工業社製
安定剤1:旭電化工業社製「AC-183」
安定剤2:旭電化工業社製「AO-60」
充填剤1:中空ガラスバルーン、旭ガラス社製「セルスターZ27」
充填剤2:セラミックバルーン、太平洋セメント社製「E−SPHERES」
顔料1:酸化チタン系白色顔料、テイカ(株)社製「JR600A」
顔料2:酸化チタン系白色顔料、テイカ(株)社製「JR1000」
顔料3:茶色顔料:富士色素工業(株)社製「Brown FT−9000」
顔料4:黒色顔料:レジノカラー工業社製「DPF−T−7939」
顔料5:黒色顔料:BASF AG 社製「Pariogen Black S0084」
顔料6:黒色顔料:特殊色料工業(株)社製「Black FT-10」
顔料7:黒色顔料:Shepherd Japan 社製「ARCTIC Black 10C909」
顔料8:黒色顔料:Shepherd Japan 社製「ARCTIC Black 411」。
(I)ペースト状プラスチゾル及び成形用組成物の調製
樹脂、顔料、充填剤及び各種添加剤を、それぞれ表1及び表2に記載の通りの組成となるように、混合してペースト状プラスチゾル及び成形用組成物を作製した。
表面層及び反射層の日射特性を評価するために、以下に示すようにして表面層(A1〜A10)及び反射層(B1〜B8)の単層シートを作製した。そして、得られた単層シートの日射特性(日射吸収率、日射透過率、日射反射率)を以下に示すようにして評価した。
調製例で得られた反射層(B1〜B6)及び表面層(A1〜A7)成形用のペースト状プラスチゾルを、それぞれ表1及び表2に記載の通りの厚みとなるように、ナイフコーティング法により離型紙上にコーティングし、140℃で2分間加熱し、次いで195℃で3分間加熱した。その後、冷却して離型紙を剥離し、反射層(B1〜B6)及び表面層(A1〜A7)の単層シートをそれぞれ作製した。
以下の方法によって、作製例で得られた反射層(B1〜B8)及び表面層(A1〜A10)の単層シートの日射特性(日射吸収率、日射透過率、日射反射率)を評価した。すなわち、先ず、作製例で得られた単層シートを試料とし、自記分光光度計U−4000(日立製作所社製)を用いて、アルミナ白色基板を反射率100%とし、各波長での反射率(分光反射率)を測定した。そして、JIS A5759付表3を用いて、分光反射率に各波長での重価係数を乗じた値の和を計算し、日射反射率を導き出した(分光日射反射率試験法)。
(日射吸収率)=100%−(日射反射率)−(日射透過率)
を用いて計算することにより、日射吸収率を導き出した。
調製例で得られた表面層(A1〜A7)成形用のペースト状プラスチゾルを、それぞれ表3及び表4に記載の通りの層構成及び厚みとなるように、ナイフコーティング法により離型紙上にコーティングして140℃で2分間加熱した。その後、このような表面層の上に調製例で得られた反射層(B1〜B6)成形用のペースト状プラスチゾルを、それぞれ表3及び表4に記載の通りの層構成及び厚みとなるように、ナイフコーティング法によりコーティングして195℃で3分間加熱した。そして、冷却した後に離型紙を剥離して複層シートをそれぞれ作製した(実施例1〜6、比較例1〜10)。
(I)評価方法
以下の方法によって、複層シートの遮熱性及び眩しさを評価した。また、複層シートの日射特性は、単層シートにおける日射特性の評価方法と同様の方法により評価した。
巾200mm、長さ300mm、厚さ0.3mmの鋼板の上に実施例及び比較例で得られた複層シートを鋼板と同じ大きさにして貼付けて試料を得た。そして、厚み30mmの発泡ポリスチレンで作製した上面が開口した箱(高さ150mm、巾240mm、長さ340mm)の底面に、試料を載置し、箱の上面に厚み1.5mmのソーダガラス板を乗せて、箱内部のシート表面の温度を熱電対で測定しつつ、北関東8月の晴天の日に太陽光に暴露した。その後、シート表面の温度上昇を観測し、上昇温度が一定になった所の温度とそのときの日陰における気温との差をΔT(℃)として記録した。
巾200mm、長さ300mm、厚さ0.3mmの鋼板の上に実施例及び比較例で得られた複層シートを鋼板と同じ大きさにして貼付けて試料を得た。そして、晴天下において、試料を斜め45度に傾け、1mの距離から肉眼で観察し、眩しさを感じるか否かを下記の基準で評価した。
A:反射が感じられず、眩しさは無い。
B:ほとんど反射は感じられないが、長時間見ていると疲れる。
C:光が反射してきて、眩しさが感じられる。
D:非常に眩しく感じられ、長時間目を向けていられない。
実施例1〜8及び比較例1〜11で得られた複層シートの日射特性、遮熱性及び眩しさを評価した。なお、日射特性については、380〜720nmの波長領域における日射吸収率、日射透過率及び日射反射率、並びに720〜1500nmの波長領域における日射吸収率、日射透過率及び日射反射率を評価した。得られた結果を表3及び表4にそれぞれ示す。
Claims (6)
- 日射を受ける表面層(A)と反射層(B)とを備える合成樹脂シート状物であって、
前記表面層(A)が380〜720nmの波長領域において90%以上の日射吸収率を有し、720〜1500nmの近赤外線領域において30%未満の日射吸収率を有し、且つ720〜1500nmの近赤外線領域において50%以上の日射透過率を有する、暗色を呈する層であり、
前記反射層(B)が380〜1500nmの波長領域において85%以上の日射反射率を有する層であり、且つ、
前記表面層(A)と前記反射層(B)とを積層したシート状物の720〜1500nmの近赤外線領域における日射反射率が70%以上である、近赤外線領域光反射性能を有する暗色シート状物。 - 前記表面層(A)及び前記反射層(B)がそれぞれ、ポリ塩化ビニル系樹脂、ポリウレタン系樹脂及び熱可塑性エラストマー系樹脂からなる群から選択される少なくとも一つの合成樹脂からなる、請求項1に記載の近赤外線領域光反射性能を有する暗色シート状物。
- 前記表面層(A)と前記反射層(B)とが同一の合成樹脂からなる、請求項1に記載の近赤外線領域光反射性能を有する暗色シート状物。
- 前記表面層(A)が、合成樹脂100重量部と、アゾ系顔料、アゾメチンアゾ系顔料、ペリレン系顔料からなる群から選択される少なくとも一つの顔料1〜5重量部とを含有する、請求項1に記載の近赤外線領域光反射性能を有する暗色シート状物。
- 前記反射層(B)が、合成樹脂100重量部と、酸化チタン系白色顔料3〜75重量部とを含有する、請求項1に記載の近赤外線領域光反射性能を有する暗色シート状物。
- 前記反射層(B)が、合成樹脂100重量部と、酸化チタン系白色顔料3〜75重量部と、ガラスビーズ、中空ガラスバルーン、マイクロカプセルからなる群から選択される少なくとも一つの充填剤5〜20重量部とを含有する、請求項1に記載の近赤外線領域光反射性能を有する暗色シート状物。
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