JP2017218331A - 合わせガラスおよび自動車ドア - Google Patents
合わせガラスおよび自動車ドア Download PDFInfo
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- JP2017218331A JP2017218331A JP2016111690A JP2016111690A JP2017218331A JP 2017218331 A JP2017218331 A JP 2017218331A JP 2016111690 A JP2016111690 A JP 2016111690A JP 2016111690 A JP2016111690 A JP 2016111690A JP 2017218331 A JP2017218331 A JP 2017218331A
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- laminated glass
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- B60J1/08—Windows; Windscreens; Accessories therefor arranged at vehicle sides
- B60J1/12—Windows; Windscreens; Accessories therefor arranged at vehicle sides adjustable
- B60J1/16—Windows; Windscreens; Accessories therefor arranged at vehicle sides adjustable slidable
- B60J1/17—Windows; Windscreens; Accessories therefor arranged at vehicle sides adjustable slidable vertically
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Abstract
Description
前記合わせガラスは、少なくとも2枚のガラス板と、前記ガラス板の間に狭持される貯蔵弾性率G’(ただし、貯蔵弾性率G’は、周波数1Hz、動的せん断歪み0.015%、温度20℃の条件下、動的粘弾性試験により測定される)が1.5×106Pa以上の中間膜とを有する合わせガラス本体と、
前記合わせガラス本体の表面に、前記合わせガラスの閉時に前記シール部材または前記パネル板と当接してこれらと前記合わせガラス本体との間の隙間を封止する粘弾性部材を有する。
合わせガラス本体11は、互いに対向する1対のガラス板11A、11Bと、1対のガラス板11A、11Bに挟持されるように配置される中間膜12を有する。中間膜12は、1対のスキン層12A、12Bと、スキン層12A、12Bに挟持されるように配置されるコア層12Cの3層からなる。合わせガラス本体11において、中間膜12は、スキン層12Aがガラス板11A側に、スキン層12Bがガラス板1B側に位置するように配置されている。合わせガラス本体11において、1対のガラス板11A、11Bおよび、中間膜を構成する3層12A、12B、12Cは略同形、同寸の主面を有する。
合わせガラス本体11における1対のガラス板11A、11Bの板厚は、それぞれ0.3mm〜1.8mmの範囲にあることが好ましい。ガラス板11A、11Bの板厚が、0.3mm以上であることで以下の中間膜と組み合わせて合わせガラスとした際の剛性を確保しやすい。ガラス板11A、11Bの板厚が1.8mm以下であることで、合わせガラスとした際の軽量化が達成しやすい。ガラス板11A、11Bの板厚は、それぞれ1.0mm〜1.8mmの範囲にあることが好ましく、1.5mm〜1.8mmの範囲にあることがより好ましい。
合わせガラス本体11における中間膜12は、1対のスキン層12A、12Bと、スキン層12A、12Bに挟持されるように配置されるコア層12Cの3層からなる。中間膜12は、ガラス板11A、11Bの間に配置され、ガラス板11A、11Bを接着して合わせガラス本体11として一体化する機能を有するものである。
合わせガラス本体11は、上記所定の板厚の1対のガラス板11A、11Bと、その間に挟持されるように配置される、上記特性を有する中間膜12を有する。これにより合わせガラス本体11は、軽量でありながら、剛性と遮音性をともに有する合わせガラスである。
合わせガラス本体は、本発明の効果を損なわない範囲で、その他の層として、1対のガラス板の間に機能フィルムを有してもよい。機能フィルムを有する場合は、例えば、中間膜を複数層で構成し、中間膜の間に機能フィルムを挟持させる構成が好ましい。
合わせガラス本体は、一般的に用いられる公知の技術により製造できる。合わせガラス本体11においては、上記のようにしてスキン層12A、12Bの間にコア層12Cを挟持させて中間膜12を作製し、これを1対のガラス板11A、11Bの間に挿入して、ガラス板11A、中間膜12(スキン層12A/コア層12C/スキン層12B)、ガラス板11Bの順に積層された圧着前の合わせガラス本体である合わせガラス前駆体を準備する。その他の層を有する場合も、同様に得られる合わせガラス本体と同様の積層順にガラス板と各層を積層してガラス前駆体を準備する。
glazing)が66%以下であることが好ましく、60%以下であることがより好ましい。
図1、図3に示す合わせガラス1において、粘弾性部材13は、合わせガラス本体11のガラス板11A側の表面Saに、合わせガラス1の閉時(以下、単に「閉時」ともいう。)にインナーパネル21と当接して合わせガラス本体11とインナーパネル21との間の隙間を封止できる位置に設けられている。粘弾性部材13の形状は閉時に、合わせガラス本体11とインナーパネル21との間の隙間を封止できる形状、すなわち、合わせガラス本体11とインナーパネル21との間に拘束され得る形状であれば特に限定されない。
合わせガラス1、合わせガラス1Bと組み合わせるドアパネル2は、通常の自動車サイドドアを構成するドアパネルであれば特に制限されない。通常の自動車サイドドアを構成するドアパネルにおいては、パネル板は粘弾性部材よりヤング率が高く、図3、図5に示される閉時において、合わせガラス本体11とパネル板(インナーパネル)21間に粘弾性部材13、粘弾性部材13Cが拘束されることで拘束型の制振構造が形成できる。また、シール部材においては、通常のシール部材と同様の構成をとることができる。通常のシール部材の構成においては、例えば、リップ部は少なくとも1個でよい。
図5に示すのと同様の構成の合わせガラス1Bをドアパネル2に取り付けた自動車ドア3を製造し、遮音性能を評価した。なお、合わせガラス1Bに用いた合わせガラス本体11は、図1に示す合わせガラス1の合わせガラス本体11の構成と同様にした。
(1)中間膜12の製造
車内側スキン層12Aおよび車外側スキン層12B用の樹脂膜として、積水化学工業株式会社製、通常中間膜(S−LEC Clear Film(商品名))を100℃、200時間静置し、可塑剤を飛散させることで硬質PVB膜を準備した。硬質PVB膜の、後述の中間膜12と同様の条件で測定される貯蔵弾性率G’は1.2×108Paであった。
板厚2mmのガラス板11A、中間膜12(ただし、車内側スキン層12A側をガラス板11A側とする)、板厚2mmのガラス板11Bを積層し、この積層体を真空バッグに入れ、絶対圧力−60kPa以下の減圧下で脱気しながら110℃で圧着を行った後、温度140℃、圧力1.3MPaの条件でさらに圧着を行うことにより合わせガラスを得た。なお、用いたガラス板11A、11Bはソーダライムガラスであった。
粘弾性部材13Cとして、遮音シートMTS−20(商品名、早川ゴム株式会社製)を準備した。なお、MTS−20の温度20℃におけるヤング率E(N/m2)と、振動数4000Hz、温度20℃における損失係数tanδは上記式(1)を満たすものである。粘弾性部材13Cは、長さ約850mm、断面形状が図5に示すのと同様に、合わせガラス1Bの閉時にシール部材41およびパネル板21の両方と当接して合わせガラス本体1Bとシール部材41およびパネル板21との間の隙間を封止する形状であった。
ドアパネル2としては、自動車のフロントドア用の図5に示すのと同様のベルトライン部Ls断面を示すドアパネル2、すなわち、互いに対向する2枚のパネル板21、22と、パネル板21、22の各対向面のベルトライン部Lsに配設されたシール部材41、42を有するドアパネル2を用いた。該ドアパネル2のシール部材41、42の間に合わせガラス1Bが位置するように合わせガラス1Bを昇降可能に取り付けた。
得られた自動車ドア3について、合わせガラス1Bを閉じた状態(閉時の状態)で、SAE J1400に準拠して、音源を車外に置いた場合として、20℃、50%RHにて、車内側での音響透過損失(STL)を測定した。なお、本測定は自動車ドア3全体の遮音性を測定するものである。
実施例1における合わせガラス本体11を比較例1の合わせガラスとして、すなわち、実施例1における合わせガラス1Bにおいて粘弾性部材13Cを有しないものを比較例1の合わせガラスとして、実施例1と同様のドアパネル2に取り付けて自動車ドアを製造した。得られた比較例1の自動車ドアについて実施例1同様の遮音性測定を行った。
比較例1における合わせガラスの中間膜を、積水化学工業株式会社製、遮音中間膜(S−LEC Sound Acoustic Film(商品名)、上記実施例1と同様に測定される貯蔵弾性率G’は1.4×106Paである。に代えて、参考例1の合わせガラス(粘弾性部材13Cを有しない)を得た。得られた参考例1の合わせガラスを実施例1と同様のドアパネル2に取り付けて自動車ドアを製造した。得られた参考例1の自動車ドアについて実施例1同様の遮音性測定を行った。
得られた結果を以下の表1および、図6に示す。
1,1A,1B…合わせガラス、2…ドアパネル、3…自動車ドア、
11…合わせガラス本体、Sa…車内側表面、Sb…車外側表面、11A,11B…ガラス板、12…中間膜、12A,12B…スキン層、12C…コア層、
13,13A,13B,13C,13D,13E,13F…粘弾性部材、
21…インナーパネル、22…アウターパネル、
41…インナーシール部材、42…アウターシール部材、411…上部インナーリップ、412…下部インナーリップ、421…上部アウターリップ、422…下部アウターリップ
Claims (7)
- 互いに対向する2枚のパネル板と、前記パネル板の各対向面のベルトラインに沿った領域にシール部材を備える自動車ドアパネルの、前記2枚のパネル板間に、前記シール部材間を摺動するように、開閉自在に配設される合わせガラスであって、
前記合わせガラスは、少なくとも2枚のガラス板と、前記ガラス板の間に狭持される貯蔵弾性率G’(ただし、貯蔵弾性率G’は、周波数1Hz、動的せん断歪み0.015%、温度20℃の条件下、動的粘弾性試験により測定される)が1.5×106Pa以上の中間膜とを有する合わせガラス本体と、
前記合わせガラス本体の表面に、前記合わせガラスの閉時に前記シール部材または前記パネル板と当接してこれらと前記合わせガラス本体との間の隙間を封止する粘弾性部材を有する、合わせガラス。 - 前記中間膜は、1層のコア層と前記コア層を挟持する1対のスキン層からなる3層構造である、請求項1記載の合わせガラス。
- 前記粘弾性部材は、複数の材料で構成される請求項1〜3のいずれか1項記載の合わせガラス。
- 前記粘弾性部材は、発泡体からなる層を含む請求項1〜4のいずれか1項記載の合わせガラス。
- 前記ガラス板の板厚みの合計が3.3mm以下である請求項1〜5のいずれか1項記載の合わせガラス。
- 請求項1〜6のいずれか1項記載の合わせガラスを備える自動車ドア。
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