JP2023517012A - 非対称積層グレージング - Google Patents
非対称積層グレージング Download PDFInfo
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- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
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- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
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- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
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- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
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Abstract
Description
R=K(E,μ)・T3
式中Kは、材料の弾性係数E及びそのポワソン比μに応じた比例係数である。このような理由から、2.85~4.85mmの厚さのモノリシックガラスの曲げ剛性Rmを、個別の厚さが1.6mm~2.6mmである2枚のガラスの積層材の曲げ剛性Rfと比較した場合、モノリシックガラスの剛性がはるかに大きいことが分かる:
Rm=K・(2.85~4.85)3
>>Rf=K・[(1.6~2.6)3+(1.6~2.6)3]
・非常に薄いガラスシート(すなわち1mm未満、典型的に0.7又は0.55mm)は、極めて脆弱であり、プロセス中の多くのステップ、すなわち切断、処理、成形前又は後の洗浄、任意の化学的強化、組立て、パレット化などにおいて、多くの破損をひき起こす;
・非常に薄いシート(すなわち1mm未満、典型的に0.7又は0.55mm)の場合に考えられる冷間成形は、以下の2つの理由から期待外れであることが判明した:すなわち、(1)非常に薄い内部ガラスシートはグレージングの周囲で折り目を形成する傾向にあることから、縁部の光学的品質又は2枚のガラスシートの組立て可能性に影響が及ぼされることを理由として、この技術で達成可能な幾何学的複雑性には限界があり、また(2)化学的強化により内部ガラスシートの機械的特性を強化することが必要である;
・非常に薄いシートを強化するために必要である化学的強化作業は、自動車用製品の生産にあまり適していないことが判明した:すなわち(1)この作業は、正しい表面応力レベルを得るために異なるアルカリ金属塩浴中に数時間高温でガラスシートを維持することを必要とするため、時間がかかりすぎ、(2)これによると、取扱い作業、化学的強化の前又は後の洗浄、そして強化作業自体の間に多くの破損が発生し、歩留りがあまり良くなく、また(3)本来不連続であり中間保管を必要とするバッチ式の作業は、生産工場において非常に混乱をきたすものである。
(1)1.1mm以上の厚さのガラスシートを使用すること、
(2)従来の熱間成形方法(「冷間」成形方法ではなく)及び積層方法において2枚のガラスシートを成形すること、そして
(3)各ガラスシートを半強化又は任意に強化するために、空気中での急速冷却による熱強化(化学的強化ではなく)を使用すること;
(4)ポリマー材料製の中間層の厚さを考慮に入れること;実際、中間層が厚くなればなるほど、それが積層グレージングの剛性をより低下させることがわかった。
- 厚いガラスV1の厚さE1が、1.4mm≦E1≦3.9mmであること、
- 薄いガラスV2の厚さE2が、1.1mm≦E2≦2.6mmであること、
- ポリマー材料Mの厚さE3が0.3mm≦E3≦1.2mmであること、
- 合計ガラス厚さEVが、2.5mm≦EV≦5.7mmであること、
- 厚さの比E2/E1が、0.34≦E2/E1≦0.9であること。
適切な場合には、剛性を促進する合計ガラス厚さについてのすでに言及した選好性、すなわち3mm≦EV≦5.7mm、さらには3.5mm≦EV≦5.7mm、と組み合わせた形で、かつ適切な場合には、V1とV2の間に従来のポリマー材料(概してPVB製)を使用すること組み合わせた形で、
- E2/E1≦0.88、好ましくはE2/E1≦0.74、好ましくはE2/E1≦0.62、そして
- 1.8mm≦E1、好ましくは2.1mm≦E1。
この組合せに関連して、最終的グレージングの剛性の僅かな喪失が受容可能である場合には、2つのガラスシートの間に音響ポリマー(概して音響PVBを含む)を設置することも可能である。
適切な場合には、剛性を促進する合計ガラス厚さについてのすでに言及した選好性、すなわち3mm≦EV≦5.7mm、さらには3.5mm≦EV≦5.7mmと組み合わせた形で、そして好ましくは、概して音響PVBである音響ポリマー材料を含む中間層の使用と組合せた形で、
- 0.36≦E2/E1、好ましくは0.39≦E2/E1、好ましくは0.42≦E2/E1、好ましくは0.45≦E2/E1、そして
- 1.4mm≦E2、好ましくは1.6mm≦E2。
- 2枚のガラスシートに空気を吹き付けることによる熱強化が後続する熱間成形ステップと、
- 2枚のガラスシートを積層グレージングへと組立てるステップであって、2枚のガラスシートの間に1枚のポリマー材料シートが置かれこれらのガラスシートに接着するステップと;
を含む方法に関する。
Claims (17)
- ポリマー材料製の中間層(M)により分離された異なる厚さの2枚のガラスシート(V1、V2)を含む、乗物(1)用の成形積層グレージング(3)であって、
- 厚いガラスV1の厚さE1が、1.4mm≦E1≦3.9mmであること、
- 薄いガラスV2の厚さE2が、1.1mm≦E2≦2.6mmであること、
- 前記ポリマー材料Mの厚さE3が、0.3mm≦E3≦1.2mmであること、
- 前記合計ガラス厚さEVが、2.5mm≦EV≦5.7mmであること、及び
- 前記厚さの比E2/E1が、0.34≦E2/E1≦0.9であること、
を特徴とする、成形積層グレージング。 - 前記合計ガラス厚さEVは、3mm≦EV≦5.7mm、好ましくは3.5mm≦EV≦5.7mmであることを特徴とする、請求項1に記載のグレージング。
- 前記ポリマー材料が、音響PVBと呼ばれる、20℃の温度、500Hz~5000Hzの周波数で20MPa未満のせん断係数G’及び0.8超のtan(δ)損失係数を有するPVBを含むことを特徴とする、請求項1~2のいずれか一項に記載のグレージング。
- - 0.36≦E2/E1、好ましくは0.39≦E2/E1、好ましくは0.42≦E2/E1、及び好ましくは0.45≦E2/E1であること、及び
- 1.4mm≦E2であること、
を特徴とする、請求項3に記載のグレージング。 - 1.6mm≦E2であることを特徴とする、請求項4に記載のグレージング。
- - E2/E1≦0.88、好ましくはE2/E1≦0.74、好ましくはE2/E1≦0.62であること、及び
- 1.8mm≦E1であること、
を特徴とする、請求項1~3のいずれか一項に記載のグレージング。 - 2.1mm≦E1であることを特徴とする、請求項6に記載のグレージング。
- 0.45≦E2/E1≦0.62であることを特徴とする、請求項1~7のいずれか一項に記載のグレージング。
- 前記少なくとも1つのガラスシートが熱強化されていること、及び好ましくは2枚のガラスシートが熱強化されていることを特徴とする、請求項1~8のいずれか一項に記載のグレージング。
- 前記2枚のガラスシートが異なる組成及び色調のものであることを特徴とする、請求項1~9のいずれか一項に記載のグレージング。
- 自動車グレージング、特にフレームレスドア用の自動車グレージングであることを特徴とする、請求項1~10のいずれか一項に記載のグレージング。
- 請求項1~11のいずれか一項に記載の前記グレージング(3)を具備している、乗物(1)。
- 前記グレージングがフレームレスドア(2)に組付けられることを特徴とする、請求項12に記載の乗物。
- 請求項1~11のいずれか一項に記載のグレージングを製造する方法であって、
- 熱間成形し、そしてその後で、前記2枚のガラスシートに空気を吹き付けることによって熱強化すること、そして
- 1枚のポリマー材料シートを、前記2枚のガラスシートの間に置き、そしてこれらのガラスシートに接着するようにして、前記2枚のガラスシートを積層グレージングへと組立てること;
を含む方法。 - 前記熱間成形が、前記2枚のガラスシートに同一の形状を付与することを特徴とする、請求項14に記載の方法。
- 前記熱間成形を、各シートに対して個別の状態で実施し、2枚のガラスシートを成形するために、同じタイプの成形プロセスを使用することを特徴とする、請求項14又は15に記載の方法。
- 前記熱間成形が、これらのガラスシートの各々について、2回の別個の生産操作にわたり実施されることを特徴とする、請求項1~17のいずれか一項に記載の方法。
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FR2002440 | 2020-03-12 | ||
FR2002440A FR3108060B1 (fr) | 2020-03-12 | 2020-03-12 | Vitrage feuillete asymetrique |
PCT/EP2021/056129 WO2021180828A1 (fr) | 2020-03-12 | 2021-03-11 | Vitrage feuillete asymetrique |
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CN113677522B (zh) | 2023-12-05 |
WO2021180828A1 (fr) | 2021-09-16 |
US20230093696A1 (en) | 2023-03-23 |
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