JP2017185456A - 塗装装置及び塗装方法 - Google Patents
塗装装置及び塗装方法 Download PDFInfo
- Publication number
- JP2017185456A JP2017185456A JP2016076770A JP2016076770A JP2017185456A JP 2017185456 A JP2017185456 A JP 2017185456A JP 2016076770 A JP2016076770 A JP 2016076770A JP 2016076770 A JP2016076770 A JP 2016076770A JP 2017185456 A JP2017185456 A JP 2017185456A
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- Prior art keywords
- solvent
- mixture
- resin
- carbon dioxide
- mpa
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Images
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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
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- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
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Abstract
【解決手段】この塗装方法は、第1溶剤、及び、二酸化炭素を含む液相の第1混合物が貯留された圧力容器から前記第1混合物を排出させて混合器に供給する工程と、樹脂を含む塗料を前記混合器に供給する工程と、前記混合器で前記第1混合物及び前記塗料を混合して第2混合物を得る工程と、第2混合物を対象物に噴霧する工程と、を備える。
【選択図】図1
Description
<塗装装置>
本実施形態に係る塗装装置100は、CO2溶剤混合ボンベ(圧力容器)1、冷却器2、ポンプ3、加熱器4、塗料タンク5、ポンプ6、加熱器7、混合器8、噴霧器9、減圧弁10、ラインL1〜L3を備える。
CO2溶剤混合ボンベ1は、第1溶剤、及び、二酸化炭素を含む液相の第1混合物を貯留する圧力容器である。ボンベ内には、液相以外の気相などの相を有することができる。
第1溶剤は、二酸化炭素と混合した液相を形成できれば特に限定されない。第1溶剤は、二酸化炭素と相溶した単一液相を形成できることが好ましい。第1溶剤は単一化合物からなっても、複数の溶剤の混合物であってもよい。
塗料タンク5には、樹脂成分を含む液状の塗料が貯留される。塗料は、樹脂成分以外に第2溶剤を含むことができる。塗料タンク5内の圧力は通常常圧すなわち大気圧である。粘度の高い塗料を確実にポンプ6に供給するため、塗料タンク5内の圧力を0〜0.2MPaとしてもよい。
δ良溶剤A+貧溶剤H=(φA・δA 2+φH・δH 2)0.5
δ良溶剤A+貧溶剤L=(φA・δA 2+φL・δL 2)0.5
したがって、樹脂のSP値SPRは、
SPR=((V良溶剤A+貧溶剤H・δ良溶剤A+貧溶剤H 2+V良溶剤A+貧溶剤L・δ良溶剤A+貧溶剤L 2)/(V良溶剤A+貧溶剤H+V良溶剤A+貧溶剤L))0.5
ここで、V良溶剤A+貧溶剤H、V良溶剤A+貧溶剤Lは、混合溶剤の濁点における平均モル体積であり、例えば、前者は、次式により求められる。
1/V良溶剤A+貧溶剤H=φA/VA+φH/VH
ここで、VA、VHはそれぞれ良溶剤A,及び、貧溶剤Hのモル体積である。
第2溶剤は樹脂成分を溶解/分散して塗料の流動性を高めるものである。第2溶剤は単一化合物からなっても、複数の溶剤の混合物であってもよい。第2溶剤のSP値は23.5(MPa)0.5未満であることができる。第2溶剤のSP値SPBは、樹脂成分のSP値SPRに対してSPR−7≦SPB≦SPR+4であることができる。
塗料が第2溶剤を含む場合、塗料における第2溶剤の配合量は特に限定されないが、樹脂成分100質量部に対して、25〜10000質量部であることができ、25〜1000質量部であることが好ましく、87〜461質量部であることがより好ましい。
表1に示す樹脂組成物、表2に示す添加剤、表3に示す溶剤を用意した。また、表4に二酸化炭素のSP値を示す。なお、表1におけるNVは、樹脂組成物の非揮発成分の質量割合を意味し、NVが100%でない場合には、溶剤を含む。
Claims (6)
- 第1溶剤、及び、二酸化炭素を含む液相の第1混合物を貯留する圧力容器と、
前記圧力容器から供給される第1混合物を、樹脂を含む塗料と混合して第2混合物を得る混合器と、
前記混合器から供給される第2混合物を噴霧する噴霧器と、を備える、塗装装置。 - 前記第1溶剤の少なくとも一部は23.5〜40(MPa)0.5の溶解度パラメータを有する、請求項1記載の装置。
- 第1溶剤、及び、二酸化炭素を含む液相の第1混合物が貯留された圧力容器を用意する工程と、
前記圧力容器から前記第1混合物を排出させて混合器に供給する工程と、
樹脂を含む塗料を前記混合器に供給する工程と、
前記混合器で前記第1混合物及び前記塗料を混合して第2混合物を得る工程と、
第2混合物を対象物に噴霧する工程と、を備える、塗装方法。 - 前記第1溶剤の少なくとも一部は23.5〜40(MPa)0.5の溶解度パラメータを有する、請求項3記載の方法。
- 第1溶剤、及び、二酸化炭素を含む液相の第1混合物を貯留した二酸化炭素塗装用の圧力容器。
- 前記第1溶剤の少なくとも一部は23.5〜40(MPa)0.5の溶解度パラメータを有する、請求項5記載の圧力容器。
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