JP5663949B2 - 積層塗膜構造 - Google Patents
積層塗膜構造 Download PDFInfo
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- JP5663949B2 JP5663949B2 JP2010114595A JP2010114595A JP5663949B2 JP 5663949 B2 JP5663949 B2 JP 5663949B2 JP 2010114595 A JP2010114595 A JP 2010114595A JP 2010114595 A JP2010114595 A JP 2010114595A JP 5663949 B2 JP5663949 B2 JP 5663949B2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/061—Special surface effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
- B05D7/577—Three layers or more the last layer being a clear coat some layers being coated "wet-on-wet", the others not
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
Description
被塗物1をカチオン電着塗料に浸漬し、被塗物1を陰極、電着槽内の極板を陽極として、この間に直流電流を流すことで被塗物1側に電着塗膜2を析出形成することができる。カチオン電着塗料は、カチオン性エポキシ樹脂、硬化剤及び顔料や添加剤を含んでいる。
ベース塗膜3は、水性ベース塗料或いは油性(溶剤型)ベース塗料の塗装によって形成することができる。水性ベース塗料に関し、その主成分である水性樹脂については、アクリル樹脂、ポリエステル樹脂、ポリウレタン樹脂、ビニル樹脂等を用いることができる。
クリヤ塗膜を形成する樹脂としては、特に限定されるものではないが、アクリル樹脂及び/又はポリエステル樹脂とアミノ樹脂との組み合わせ、或いはカルボン酸・エポキシ硬化系を有するアクリル樹脂及び/又はポリエステル樹脂等が挙げられる。例えば、2液ウレタンクリヤ塗料は、水酸基含有アクリル樹脂及びポリイソシアネート化合物を含有する。有機溶剤の例としては、炭化水素系溶剤、エステル系溶剤、ケトン系溶剤、アルコール系溶剤、エーテル系溶剤、芳香族石油系溶剤等が挙げられる。
先に説明したように、同じ着色顔料でも顔料の粒子径によって光の吸収性・反射性が異なる。すなわち、特定色の波長の光が塗膜内を進むときは、端的に言えば、顔料粒子間をすり抜けていくことになる。顔料の粒子径が小さいほど特定色の波長の光がすり抜け易くなる(透過性が良い)。そのすり抜ける過程で、特定色以外の不要な波長の光は当該顔料に吸収されていく(彩度が高くなる)。一方、顔料の粒子径が大きくなると、特定色の波長の光は、顔料粒子間をすり抜け難くなる。すなわち、顔料粒子表面で反射され易くなる(反射性が良い)。
先に上側の第2ベース塗膜3bの顔料粒子径の最適化について説明する。図4は顔料の平均粒子径と彩度の指標であるΔC*(L*C*h*表色系の彩度差)との関係を示す。顔料としては、ピーク波長660nmの赤色顔料(True Red)を用いた。すなわち、第2ベース塗膜3bの顔料の平均粒子径が異なる種々のサンプルを作製し、別に作製した彩度C*が60である塗装板との彩度差ΔC*を村上色彩技術研究所社製の色差計GSP−2を用いて測定した。
次に下側の第1ベース塗膜3aの顔料粒子径の最適化について説明する。図5は顔料の平均粒子径とその顔料によって発色すべき色の光の反射率との関係を示している。顔料としてはピーク波長660nmの赤色顔料(True Red)を用い、ベース塗膜の顔料の平均粒子径を変化させた各サンプルについて上記波長660nmの光の反射率を分光光度計で測定した。サンプルは、鋼板に電着塗装(主成分;エポキシ樹脂,塗膜厚;18μm)、ベース塗装(水性,主成分;アクリルメラミン樹脂,塗膜厚;10μm)及びクリヤ塗装(主成分;アクリルウレタン樹脂,塗膜厚;35μm)を順に施したものである。
ベース塗膜の顔料として、図6に示す0.25μmにピークを有する粒度分布の普通顔料A、0.35μmにピークを有する粒度分布の高反射顔料B(平均粒子径0.35μm)、並びに0.11μmにピークを有する粒度分布の高彩度顔料C(平均粒子径0.11μm)を準備した。それら顔料A,B,Cはいずれもピーク波長660nmの赤色顔料(True Red)である。そして、第1ベース塗膜用として、表1に示す顔料配合及び顔料濃度の第1ベース塗料(水性アクリルメラミン塗料)1−1ないし1−4の4種類を調製し、第2ベース塗膜用として、表2に示す顔料配合及び顔料濃度の第2ベース塗料(水性アクリルメラミン塗料)2−1ないし2−4の4種類を調製した。なお、顔料濃度は焼付け後の塗膜における濃度である。
同図によれば、第2ベース塗膜に普通顔料Aを使用した場合でも、その顔料濃度を高めると(□→●→△)、色差ΔE*が小さくなることがわかる。また、第1ベース塗膜に普通顔料Aを使用した場合でも、その顔料濃度を高めると、反射率が高くなって色差ΔE*が小さくなることがわかる。しかし、ベース塗膜の顔料濃度の増大には限界がある(例えば30質量%程度)。従って、顔料濃度増大による色差ΔE*の低減にも限界があり、同図のサンプルX(第1ベース塗料1−3と第2ベース塗料2−2との組み合わせ)も色差ΔE*は3.5程度であって比較的大きい。
上記実施形態は、第1ベース塗膜と第2ベース塗膜とで特定色としてピーク波長660nmの赤色を発色させるケースである。そこで、両ベース塗膜で特定色として他の色を出す場合の顔料粒子径について説明する。この場合も、赤色顔料の場合と同様に、その特定色のピーク波長に基いて、顔料の平均粒子径を定めることができる。
2 電着塗膜
3 ベース塗膜
3a 第1ベース塗膜(第1層)
3b 第2ベース塗膜(第2層)
4 クリヤ塗膜
5 高反射顔料
6 高彩度顔料
Claims (3)
- 被塗物に塗装された下側の第1層及び上側の第2層の両塗膜によって特定色を出すようにした積層塗膜構造において、
上記被塗物表面に電着塗膜が形成され、上記第1層の塗膜は該電着塗膜表面に直接重なるように形成され、
上記第2層の塗膜は、上記第1層の塗膜表面に直接重なるように形成されており、
上記第1層は、上記特定色を出すための、平均粒子径が上記特定色の波長の1/2以上で且つ2μm以下である顔料を有し、
上記第2層は、上記特定色を出すための、平均粒子径が0.05μm以上で且つ上記特定色の波長の1/2未満である顔料を有することを特徴とする積層塗膜構造。 - 請求項1において、
上記第2層の上記顔料の平均粒子径が、0.05μm以上で且つ上記特定色の波長の1/3未満であることを特徴とする積層塗膜構造。 - 請求項1又は請求項2において、
上記特定色は有彩色であることを特徴とする積層塗膜構造。
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| JP2010114595A JP5663949B2 (ja) | 2010-05-18 | 2010-05-18 | 積層塗膜構造 |
| US13/642,396 US10052658B2 (en) | 2010-05-18 | 2011-05-13 | Laminated coating film structure |
| CN201180024511.1A CN102933317B (zh) | 2010-05-18 | 2011-05-13 | 层叠涂敷薄膜结构 |
| PCT/JP2011/002665 WO2011145303A1 (en) | 2010-05-18 | 2011-05-13 | Laminated coating film structure |
| DE112011101668.9T DE112011101668B4 (de) | 2010-05-18 | 2011-05-13 | Laminierte Beschichtungsfilmstruktur |
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| JP2015066865A (ja) * | 2013-09-30 | 2015-04-13 | マツダ株式会社 | 積層塗膜及び塗装物 |
| JP6410508B2 (ja) * | 2014-05-20 | 2018-10-24 | トリニティ工業株式会社 | 加飾部品及びその製造方法 |
| US10239091B2 (en) * | 2014-10-23 | 2019-03-26 | Kansai Paint Co., Ltd. | Method for forming multilayer coating film |
| JP6355585B2 (ja) * | 2014-12-01 | 2018-07-11 | 関西ペイント株式会社 | 複層塗膜形成方法 |
| JP6254970B2 (ja) * | 2015-03-31 | 2017-12-27 | 株式会社Subaru | 積層塗膜の形成方法 |
| JP6138323B1 (ja) * | 2016-07-13 | 2017-05-31 | 関西ペイント株式会社 | 複層塗膜形成方法 |
| RU2696443C1 (ru) * | 2016-09-30 | 2019-08-01 | Мазда Мотор Корпорейшн | Многослойная покровная пленка и изделие с покрытием |
| RU2702593C1 (ru) | 2016-09-30 | 2019-10-08 | Мазда Мотор Корпорейшн | Многослойная покровная пленка и изделие с покрытием |
| JP6875138B2 (ja) * | 2017-02-01 | 2021-05-19 | 日本ペイント・オートモーティブコーティングス株式会社 | 積層塗膜、塗装物及び積層塗膜の形成方法 |
| JP7694016B2 (ja) * | 2020-11-13 | 2025-06-18 | マツダ株式会社 | 積層塗膜及び塗装物 |
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| WO1996033814A1 (fr) * | 1995-04-27 | 1996-10-31 | Kansai Paint Co., Ltd. | Procede de revetement multicouche |
| KR20060061355A (ko) * | 2003-09-11 | 2006-06-07 | 닛뽕 뻬인또 가부시키가이샤 | 전기적 관통 구멍을 형성하여 양이온 전착 막을 형성하는방법 및 전기적 관통 구멍을 형성하는 양이온 전착 조성물 |
| JP2005169313A (ja) * | 2003-12-12 | 2005-06-30 | Nissan Motor Co Ltd | 高彩度積層塗膜および塗膜形成方法 |
| DE102005012056A1 (de) * | 2005-03-16 | 2006-09-28 | Basf Coatings Ag | Mehrschichtlackierungen, Verfahren zu ihrer Herstellung und deren Verwendung im Automobilbau |
| US20070071901A1 (en) | 2005-09-29 | 2007-03-29 | Giannoula Avgenaki | Process for the production of multi-layer coatings |
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| DE112011101668B4 (de) | 2015-07-02 |
| CN102933317A (zh) | 2013-02-13 |
| US20130048501A1 (en) | 2013-02-28 |
| US10052658B2 (en) | 2018-08-21 |
| DE112011101668T5 (de) | 2013-03-14 |
| CN102933317B (zh) | 2016-03-30 |
| JP2011240255A (ja) | 2011-12-01 |
| WO2011145303A1 (en) | 2011-11-24 |
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