JPWO2019167897A1 - 熱線遮蔽構造体およびそれを含む合わせガラスならびにそれらの製造方法 - Google Patents
熱線遮蔽構造体およびそれを含む合わせガラスならびにそれらの製造方法 Download PDFInfo
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- JPWO2019167897A1 JPWO2019167897A1 JP2019537191A JP2019537191A JPWO2019167897A1 JP WO2019167897 A1 JPWO2019167897 A1 JP WO2019167897A1 JP 2019537191 A JP2019537191 A JP 2019537191A JP 2019537191 A JP2019537191 A JP 2019537191A JP WO2019167897 A1 JPWO2019167897 A1 JP WO2019167897A1
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Images
Classifications
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Abstract
Description
(1)
第1の樹脂層と第2の樹脂層との間に熱線遮蔽層を含む熱線遮蔽構造体であって、
前記熱線遮蔽層は、
高屈折率層および低屈折率層の繰り返し多層構造を有する第1の熱線反射層もしくは少なくともAu、Ag、CuおよびAlのいずれかを含有する第2の熱線反射層である熱線反射層、
無機酸化物および色素の少なくとも一方ならびにバインダー樹脂を含有する熱線吸収層、または
前記熱線反射層および前記熱線吸収層を含む層、
である熱線遮蔽構造体。
(2)
以下の工程を有する熱線遮蔽構造体の製造方法、
(A)剥離性を有する基材上に、高屈折率層および低屈折率層の繰り返し多層構造を有する第1の熱線反射層もしくは少なくともAu、Ag、CuおよびAlのいずれかを含有する第2の熱線反射層である熱線反射層を積層するか、
前記剥離性を有する基材上に、無機酸化物および色素の少なくとも一方ならびにバインダー樹脂を含有する熱線吸収層を積層するか、または、
前記剥離性を有する基材上に、前記熱線反射層および前記熱線吸収層のいずれか一方を積層し、さらに前記熱線反射層および前記熱線吸収層のいずれか一方の上に前記熱線反射層および前記熱線吸収層のいずれか他方を積層することで、第1の積層体を得る工程、
(B)工程(A)で得られた前記第1の積層体の前記熱線反射層または前記熱線吸収層を第1の樹脂層と張り合わせたのち前記剥離性を有する基材を剥離することで、前記第1の樹脂層上に前記熱線反射層または前記熱線吸収層を配置して第2の積層体を得る工程、
(C)工程(B)で得られた前記第2の積層体の前記熱線反射層または前記熱線吸収層を第2の樹脂層と張り合わせて、前記第2の樹脂層上に前記熱線反射層または前記熱線吸収層を配置して熱線遮蔽構造体を得る工程。
(3)
前記剥離性を有する基材は、25mm幅の粘着テープと前記剥離性を有する基材との速度300mm/minにおける180°剥離試験での剥離力が1000mN/25mm以上5000mN/25mm以下である、(2)に記載の熱線遮蔽構造体の製造方法。
(4)
第1のガラス板と、(1)に記載の熱線遮蔽構造体と、第2のガラス板とをこの順に有する熱線遮蔽構造体を構成中に含む合わせガラス。
(5)
(2)に記載の工程(A)、(B)および(C)を有し、さらに以下の工程を有する合わせガラスの製造方法、
(D)第1のガラス板と第2のガラス板との間に(2)に記載の工程(C)で得られた熱線遮蔽構造体を配置する工程。
(6)
前記剥離性を有する基材は、25mm幅の粘着テープと前記剥離性を有する基材との速度300mm/minにおける180°剥離試験での剥離力が1000mN/25mm以上5000mN/25mm以下である、(5)に記載の合わせガラスの製造方法。
(7)
(4)に記載の合わせガラスを含む窓。
本実施形態に係る熱線遮蔽構造体は、第1の樹脂層と第2の樹脂層との間に熱線遮蔽層を含む。本実施形態における熱線遮蔽層は、図1に示すように剥離性を有する基材1上に熱線遮蔽機能を有する層として設けられる(熱線遮蔽層2)。剥離性を有する基材1上に熱線遮蔽層2を備える第1の積層体(図1)によれば、ロール状に連続作製して窓材に張り付けて、剥離性を有する基材1を剥がすことで熱線遮蔽層2を容易に転写できる。これにより合わせガラスや窓の生産性を向上させることができる。
また上記観点から、本実施形態の熱線遮蔽構造体中に支持基材(例えばPET等)を含有しない構成も、好ましい実施態様である。
(A)剥離性を有する基材上に、第1の熱線反射層もしくは第2の熱線反射層である熱線反射層を積層するか、
剥離性を有する基材上に、熱線吸収層を積層するか、または、
前記剥離性を有する基材上に、熱線反射層および熱線吸収層のいずれか一方を積層し、さらに熱線反射層および熱線吸収層のいずれか一方の上に熱線反射層および熱線吸収層のいずれか他方を積層することで、第1の積層体を得る工程、
(B)工程(A)で得られた第1の積層体の熱線反射層または熱線吸収層を第1の樹脂層と張り合わせたのち剥離性を有する基材を剥離することで、第1の樹脂層上に熱線反射層または熱線吸収層を配置して第2の積層体を得る工程、
(C)工程(B)で得られた第2の積層体の熱線反射層または熱線吸収層を第2の樹脂層と張り合わせて、第2の樹脂層上に熱線反射層または熱線吸収層を配置して熱線遮蔽構造体を得る工程。
なお、剥離性を有する基材上に熱線反射層および熱線吸収層の両方を積層する場合、その積層順番は限定されない。
(D)第1のガラス板と第2のガラス板の間に工程(C)で得られた熱線遮蔽構造体を配置する工程。
(熱線反射層用の高屈折率樹脂塗布液の作製)
平均一次粒子径35nmである酸化チタン微粒子(商品名「TTO−51A」、石原産業株式会社製) 1.4質量部、KAYARAD DPHA(日本化薬株式会社製) 0.4質量部、2−メチル−1−[4−(メチルチオ)フェニル]−2−モルホリノプロパン−1−オン(BASFジャパン株式会社製「イルガキュア907」) 0.05質量部、および分散剤(商品名「DISPERBYK−2001」、ビック・ケミージャパン株式会社製) 0.3質量部をトルエン 7質量部中に加え、高屈折率樹脂塗布液を作製した。
KAYARAD DPHA 0.4質量部およびイルガキュア907 0.05質量部をメチルエチルケトン(MEK) 4質量部に溶解した溶液中に、中空シリカ微粒子(商品名「スルーリア」、平均一次粒子径50nm、固形分濃度20重量%、日揮触媒化成株式会社製、分散媒:メチルイソブチルケトン) 3質量部を分散させ、低屈折率樹脂塗布液を調製した。
KAYARAD PET30(日本化薬株式会社製) 63.5質量部およびイルガキュア184 5質量部を、MEK 200質量部に溶解させた溶液中にスズドープ酸化インジウム微粒子(商品名「ITO−R」、CIKナノテック株式会社製) 30質量部、銅(II)2,3−ナフタロシアニン(シグマアルドリッチジャパン合同会社製) 1.5質量部を分散させ、熱線吸収層用の樹脂塗布液を調整した。
(積層体Aの作製)
剥離性を有する基材1として75μm厚みのポリエステル製剥離性フィルム(商品名「SP2020」 東洋クロス株式会社製)を用い、マイクログラビアコーター(商品名「プライムコーター」、康井精機社製社製)により基材上に高屈折率樹脂塗布液を乾燥後に層厚が120nmになるように塗布した。60℃で1分乾燥後、紫外線照射することで基材上に高屈折率樹脂層を作製した。続いて、高屈折樹脂層上に低屈折率樹脂塗布液を乾燥後に層厚が150nmになるよう塗布した。60℃で1分乾燥後、紫外線照射することで基材上に高屈折樹脂層と、低屈折樹脂層とをこの順に積層した。以降同様に高屈折率樹脂層、低屈折率樹脂層、高屈折率樹脂層、低屈折率樹脂層をこの順に積層し、計6層で構成される熱線反射層を作製した。次いで、熱線反射層上に熱線吸収層用の樹脂塗布液を乾燥後に層厚が2μmになるよう塗布し熱線吸収層を作製した。これにより剥離性を有する基材1上に6層で構成される熱線反射層3と熱線吸収層4とを有する熱線遮蔽層Aを有する積層体Aを作製した。層厚が2.81μmである熱線遮蔽層Aを、剥離性を有する基材1から剥離したところ、自立性に劣り、脆く容易にちぎれてしまうため熱線遮蔽層Aを単独で取り扱うことはできなかった。
(積層体Bの作製)
製造例2において剥離性を有する基材1上に熱線反射層3を形成した後、次いで熱線吸収層4を作製しない以外は製造例2と同様にして熱線遮蔽層Bを有する積層体Bを作製した。層厚が0.81μmである熱線遮蔽層Bを、剥離性を有する基材1から剥離したところ、自立性に劣り、脆く容易にちぎれてしまうため熱線遮蔽層Bを単独で取り扱うことはできなかった。
(積層体Cの作製)
製造例2において剥離性を有する基材1として75μm厚みのポリエステル製剥離性フィルム(商品名「SP2020」 東洋クロス株式会社製)の代わりに、剥離性を有さない基材として厚み75μmのポリエステルフィルム(コスモシャインA4300 東洋紡株式会社製)(プラスチック支持基材9)を用いて積層体Cを作製した。層厚が2.81μmである熱線遮蔽層Aはポリエステルフィルムに固着しており剥離することはできなかった。ただし、ポリエステルフィルムの基材上に熱線遮蔽層Aを有しており自立性を有するフィルムとして取り扱うことができた。
(第1のシート状接着樹脂5の作製)
ポリビニルブチラール樹脂(商品名「エスレック」、積水化学社製) 360g、およびトリエチレングリコールビス(2−エチルブチレート)130gを、3本ロールミキサーにより約70℃で15分間練りこみ混合することで第1のシート状接着樹脂原料を得た。次いで押出し成形機を用いて、成形温度200℃で押出し成形することで、厚み約0.8mmの第1のシート状接着樹脂5を作製した。
(第2のシート状接着樹脂6の作製)
ポリビニルブチラール樹脂(商品名「エスレック」、積水化学社製) 360g、ITO微粒子(粒径0.02μm以下)1.6gを添加したトリエチレングリコールビス(2−エチルブチレート)130gを、3本ロールミキサーにより約70℃で15分間練りこみ混合することで第2のシート状接着樹脂原料を得た。次いで押出し成形機を用いて、成形温度200℃で押出し成形することで、厚み約0.8mmの熱線吸収性を有する第2のシート状接着樹脂6を作製した。
(熱線遮蔽構造体Aを構成中に含む合わせガラスの作製)
製造例2で作製した積層体Aの熱線吸収層4の面に第1の樹脂層として製造例5で作製した第1のシート状接着樹脂5を、ロールラミネータを用いて熱接着させた。ラミネーターロールの温度は140℃、ニップ圧力は0.2MPa、搬送速度は0.7m/分であった。熱接着後、積層体から剥離性を有する基材1を剥離し、第1の樹脂上に熱線遮蔽層を配置した。次いで、熱線反射層3の面と第2の樹脂層として製造例5で作製した第1のシート状接着樹脂5とをロールラミネータを用いて熱接着させて熱線遮蔽構造体Aを作製した。ラミネーターロールの温度は140℃、ニップ圧力は0.2MPa、搬送速度は0.7m/分であった。次いで厚さ2mのソーダガラス7、熱線遮蔽構造体A、および厚さ2mmのグリーンガラス8をこの順で重ねあわせた後、真空バッグに入れ、−0.09MPaまで真空ポンプで減圧した。その後、減圧下で110℃、30分間保持し予備圧着した。予備圧着後、オートクレーブにて圧力1.5Mpa、150℃の条件で30分間保持し本圧着した。その後常温常圧まで戻すことで本発明に係る熱線遮蔽構造体Aを構成中に含む合わせガラスを作製した(図2参照)。
(熱線遮蔽構造体Bを構成中に含む合わせガラスの作製)
実施例1において積層体Aの代わりに製造例3で作製した積層体Bを用いる以外は実施例1と同様にして第1の樹脂上に熱線反射層3を配置した。次いで熱線反射層3の面と第2の樹脂層として製造例6で作製した第2のシート状接着樹脂6を、ロールラミネータを用いて熱接着させて熱線遮蔽構造体Bを作製した。ラミネーターロールの温度は140℃、ニップ圧力は0.2MPa、搬送速度は0.7m/分であった。次いで厚さ2mのソーダガラス7、熱線遮蔽構造体B、および厚さ2mmのグリーンガラス8をこの順で重ね合わせた後、真空バッグに入れ、−0.09MPaまで真空ポンプで減圧した。その後、減圧下で110℃、30分間保持し予備圧着した。予備圧着後、オートクレーブにて圧力1.5Mpa、150℃の条件で30分間保持し本圧着した。その後常温常圧まで戻すことで本発明に係る熱線遮蔽構造体Bを構成中に含む合わせガラスを作製した(図3参照)。
厚さ2mのソーダガラス7、第1のシート状接着樹脂5、製造例4で作製した積層体C、第1のシート状接着樹脂5、および厚さ2mmのグリーンガラス8をこの順で重ねあわせた後、真空バッグに入れ、−0.09MPaまで真空ポンプで減圧した。その後、減圧下で110℃、30分間保持し予備圧着した。予備圧着後、オートクレーブにて圧力1.5Mpa、150℃の条件で30分間保持し本圧着した。その後常温常圧まで戻すことで構造中にプラスチック支持基材9を含む比較用の熱線遮蔽構造体Cを構成中に含む合わせガラスを作製した(図4参照)。
厚さ2mのソーダガラス7、第2のシート状接着樹脂6、および厚さ2mmのグリーンガラス8をこの順で重ね合わせた後、真空バッグに入れ、−0.09MPaまで真空ポンプで減圧した。その後、減圧下で110℃、30分間保持し予備圧着した。予備圧着後、オートクレーブにて圧力1.5Mpa、150℃の条件で30分間保持し本圧着した。その後常温常圧まで戻すことでシート状接着樹脂層が熱線吸収機能を有している比較用の構造体Dを配置した合わせガラスを作製した(図5参照)。
分光光度計(株式会社島津製作所、商品名「UV−3100」)を用いて、JIS R 3106に準拠して、得られた熱線遮蔽構造体の波長380nm〜780nmにおける可視光透過率を測定した。
全日射透過率(Tts;Total Solar Transmittance)は、太陽からの熱的エネルギー(全日射エネルギー)のうちどの程度の熱的エネルギーが、測定対象となる材料を透過するかという尺度である。熱線遮蔽構造体の全日射透過率(Tts)は、ISO13837に定義されている測定方法および計算式にて算出した。算出された熱線遮蔽構造体の全日射透過率の数値が小さいほど、熱線遮蔽構造体を透過する全日射エネルギーが小さいことを示し、熱線遮蔽構造体の熱線遮蔽性が高いことを示す。尚、分光光度計で透過率、反射率を測定する際、入射光はソーダガラス側(外気側)より入射させた。
ヘイズメーター(有限会社東京電色製、商品名「TC−HIIIDPK」)を用いて、JIS K 6714に準拠して、得られた熱線遮蔽構造体のヘイズを測定した。
なお、本願は、2018年2月27日付で出願された日本国特許出願(特願2018−32984)に基づいており、その全体が引用により援用される。また、ここに引用されるすべての参照は全体として取り込まれる。
Claims (7)
- 第1の樹脂層と第2の樹脂層との間に熱線遮蔽層を含む熱線遮蔽構造体であって、
前記熱線遮蔽層は、
高屈折率層および低屈折率層の繰り返し多層構造を有する第1の熱線反射層もしくは少なくともAu、Ag、CuおよびAlのいずれかを含有する第2の熱線反射層である熱線反射層、
無機酸化物および色素の少なくとも一方ならびにバインダー樹脂を含有する熱線吸収層、または
前記熱線反射層および前記熱線吸収層を含む層、
である熱線遮蔽構造体。 - 以下の工程を有する熱線遮蔽構造体の製造方法、
(A)剥離性を有する基材上に、高屈折率層および低屈折率層の繰り返し多層構造を有する第1の熱線反射層もしくは少なくともAu、Ag、CuおよびAlのいずれかを含有する第2の熱線反射層である熱線反射層を積層するか、
前記剥離性を有する基材上に、無機酸化物および色素の少なくとも一方ならびにバインダー樹脂を含有する熱線吸収層を積層するか、または、
前記剥離性を有する基材上に、前記熱線反射層および前記熱線吸収層のいずれか一方を積層し、さらに前記熱線反射層および前記熱線吸収層のいずれか一方の上に前記熱線反射層および前記熱線吸収層のいずれか他方を積層することで、第1の積層体を得る工程、
(B)工程(A)で得られた前記第1の積層体の前記熱線反射層または前記熱線吸収層を第1の樹脂層と張り合わせたのち前記剥離性を有する基材を剥離することで、前記第1の樹脂層上に前記熱線反射層または前記熱線吸収層を配置して第2の積層体を得る工程、
(C)工程(B)で得られた前記第2の積層体の前記熱線反射層または前記熱線吸収層を第2の樹脂層と張り合わせて、前記第2の樹脂層上に前記熱線反射層または前記熱線吸収層を配置して熱線遮蔽構造体を得る工程。 - 前記剥離性を有する基材は、25mm幅の粘着テープと前記剥離性を有する基材との速度300mm/minにおける180°剥離試験での剥離力が1000mN/25mm以上5000mN/25mm以下である、請求項2に記載の熱線遮蔽構造体の製造方法。
- 第1のガラス板と、請求項1に記載の熱線遮蔽構造体と、第2のガラス板とをこの順に有する熱線遮蔽構造体を構成中に含む合わせガラス。
- 請求項2に記載の工程(A)、(B)および(C)を有し、さらに以下の工程を有する合わせガラスの製造方法、
(D)第1のガラス板と第2のガラス板との間に請求項2に記載の工程(C)で得られた熱線遮蔽構造体を配置する工程。 - 前記剥離性を有する基材は、25mm幅の粘着テープと前記剥離性を有する基材との速度300mm/minにおける180°剥離試験での剥離力が1000mN/25mm以上5000mN/25mm以下である、請求項5に記載の合わせガラスの製造方法。
- 請求項4に記載の合わせガラスを含む窓。
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