JP4586964B2 - Steel plate printing paint and steel plate printing method - Google Patents
Steel plate printing paint and steel plate printing method Download PDFInfo
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- JP4586964B2 JP4586964B2 JP2004158961A JP2004158961A JP4586964B2 JP 4586964 B2 JP4586964 B2 JP 4586964B2 JP 2004158961 A JP2004158961 A JP 2004158961A JP 2004158961 A JP2004158961 A JP 2004158961A JP 4586964 B2 JP4586964 B2 JP 4586964B2
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- 229910000831 Steel Inorganic materials 0.000 title claims description 59
- 239000010959 steel Substances 0.000 title claims description 59
- 239000003973 paint Substances 0.000 title claims description 57
- 238000000034 method Methods 0.000 title claims description 18
- 238000009835 boiling Methods 0.000 claims description 73
- 239000002904 solvent Substances 0.000 claims description 61
- 239000011347 resin Substances 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 21
- 239000000049 pigment Substances 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000004040 coloring Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 2
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 2
- QCDWFXQBSFUVSP-UHFFFAOYSA-N 2-phenoxyethanol Chemical compound OCCOC1=CC=CC=C1 QCDWFXQBSFUVSP-UHFFFAOYSA-N 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- -1 acetylbutyl Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012461 cellulose resin Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229960005323 phenoxyethanol Drugs 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
本発明は、温度範囲が常温〜300 ℃の鋼製板材にアトマイズエアー方式により印字する鋼板印字用ペイント及び鋼板印字方法に関するものである。 The present invention relates to a steel plate printing paint and a steel plate printing method for printing on a steel plate having a temperature range of room temperature to 300 ° C. by an atomizing air system.
周知の通り、鉄鋼材製造工場、自動車製造工場、造船所などにおいては、鉄板などの鋼製板材(鋼板)の表面にドット印字装置を用いて材質や用途を表示する文字を印字しており、当該ドット印字装置として口径0.10〜0.25mmφの吐出ノズルが複数個配置されて該吐出ノズルの開閉を制御することにより粘度20〜30cPに調整されたペイントをドット状に断続して吐出させて鋼板の表面に所要の文字・記号やラインを描いてマーキングを行う形式のドット印字装置が汎用されている。 As is well known, in steel material manufacturing factories, automobile manufacturing factories, shipyards, etc., characters that indicate materials and uses are printed on the surface of steel plate materials (steel plates) such as iron plates using a dot printing device, As the dot printing device, a plurality of discharge nozzles having a diameter of 0.10 to 0.25 mmφ are arranged, and by controlling the opening and closing of the discharge nozzles, the paint adjusted to a viscosity of 20 to 30 cP is intermittently discharged in the form of dots to discharge the steel plate 2. Description of the Related Art A dot printing apparatus that performs marking by drawing required characters / symbols or lines on the surface is widely used.
前記ドット印字装置には、例えば、無機着色顔料5〜10重量%と、エチルセルロース樹脂、アセチルブチルセルロース樹脂、ヒドロキシプロピルセルロース樹脂及び熱可塑性アクリル樹脂等の被膜形成樹脂5〜10重量%と、被膜形成樹脂の溶解性が良い沸点80℃以下の高揮発性有機溶剤5〜15重量%と、単独では被膜形成樹脂の溶解性が悪いか或いは溶解しない沸点80℃を越える中揮発性有機溶剤45〜75重量%と、被膜形成樹脂の溶解性が良い沸点120 ℃以上の低揮発性有機溶剤10〜20重量%とからなるペイントが用いられている(特許文献1参照)。 Examples of the dot printing device include 5 to 10% by weight of an inorganic coloring pigment, 5 to 10% by weight of a film-forming resin such as ethyl cellulose resin, acetylbutyl cellulose resin, hydroxypropyl cellulose resin, and thermoplastic acrylic resin, and film formation. Highly volatile organic solvent having a boiling point of 80 ° C. or lower with good resin solubility, 5 to 15% by weight, and medium-volatile organic solvent having a boiling point of over 80 ° C., which has poor solubility or does not dissolve by itself. A paint composed of 10% by weight and 10 to 20% by weight of a low-volatile organic solvent having a boiling point of 120 ° C. or higher with good solubility of the film-forming resin is used (see Patent Document 1).
また、厚板製造ラインではライン構成上、常温から300 ℃付近の温度範囲の鋼板に対して印字する必要があるため、細管よりなる二流体スプレーノズルを用いてペイントを噴霧して印字している(特許文献2参照)。 In addition, the thick plate production line requires printing on steel sheets in the temperature range from room temperature to around 300 ° C due to the line configuration, so it is printed by spraying paint using a two-fluid spray nozzle consisting of thin tubes. (See Patent Document 2).
さらに、厚板製造ライン等の常温から300 ℃付近の温度範囲までを対象とした二流体スプレーノズルによる印字方法では、沸点が50〜80℃の有機溶剤を主溶剤としたペイントを使用して対象物の温度によりペイント圧力とアトマイズエアー圧力とを制御して常温から300 ℃付近の温度範囲の厚板に対して印字する鋼板マーキング方法(特許文献3参照)が提案されている。 Furthermore, in the printing method using a two-fluid spray nozzle for the temperature range from room temperature to around 300 ° C, such as on a thick plate production line, it is possible to use paint with an organic solvent whose boiling point is 50-80 ° C as the main solvent. There has been proposed a steel plate marking method (see Patent Document 3) for printing on a thick plate in a temperature range from room temperature to around 300 ° C. by controlling the paint pressure and the atomizing air pressure according to the temperature of the object.
前記従来のペイントを使用しての二流体スプレーノズルを用いたアトマイズエアー方式による印字方法では、吐出されたペイントがアトマイズエアーにより霧状となって鋼板に付着し、さらに、アトマイズエアーによって押し広げられることにより、ある一定の径のドットが形成されるが、鋼板が高温の場合には鋼板温度とペイントの主溶剤の沸点とに大幅な温度差が生じ、ドット形成の過程で鋼板の界面上でペイントが急速な沸騰現象を起こして飛散し、鋼板上に十分に付着しなくなるので、アトマイズエアー圧力、ペイント圧力及び鋼板までの距離を変化させてペイントの吐出速度、吐出量及び液状態を変えて各温度に対応した印字条件にて印字を行っており、このため、印字装置のほかに温度センサーや制御機構を必要とするという問題点があった。 In the printing method by the atomized air method using the conventional two-fluid spray nozzle using the paint, the discharged paint is atomized by the atomized air and adheres to the steel plate, and is further spread by the atomized air. As a result, a dot of a certain diameter is formed, but when the steel plate is hot, a large temperature difference occurs between the steel plate temperature and the boiling point of the main solvent of the paint, and on the steel plate interface during the dot formation process. The paint will cause a rapid boiling phenomenon and scatter and will not adhere sufficiently to the steel sheet. Change the atomizing air pressure, paint pressure and distance to the steel sheet to change the paint discharge speed, discharge amount and liquid state. Printing is performed under the printing conditions corresponding to each temperature. For this reason, a temperature sensor and a control mechanism are required in addition to the printing device. There was a point.
また、100 ℃以下の鋼板においては、アトマイズエアーを用いない方法により実施されており、該方法においては、乾燥のために沸点50〜80℃の有機溶剤を主溶剤としたペイントが用いられているが、作業環境によって鋼板温度が100 ℃を越えると有機溶剤が蒸発して印字できないという問題点があった。 In addition, in a steel plate of 100 ° C. or less, it is carried out by a method that does not use atomized air, and in this method, a paint using an organic solvent having a boiling point of 50 to 80 ° C. as a main solvent is used for drying. However, when the steel sheet temperature exceeds 100 ° C. depending on the working environment, there is a problem that the organic solvent evaporates and printing cannot be performed.
そこで、本発明者は、アトマイズエアー圧力、ペイント圧力及び鋼板までの距離を変化させなくても温度範囲が常温〜300 ℃の鋼板に対してドット径を同じに保持して印字できるペイント及び該ペイントを使用した印字方法を得ることを技術的課題として、その具現化をはかるべく研究・実験を重ねた結果、ペイントを沸点80℃未満の高揮発性溶剤と沸点80〜150 ℃の中揮発性溶剤と沸点が150 ℃を越え220 ℃以下の溶剤と沸点が220 ℃を越える溶剤とから構成して初期粘度を50〜70cPとすれば、沸点の異なる各溶剤を鋼板温度によって段階的に揮発させて粘度を変化させることにより、ペイントの飛散を可及的に抑制してドット径を略同じに保持して印字できるという刮目すべき知見を得、前記技術的課題を達成したものである。 Therefore, the present inventor has disclosed a paint that can be printed with the same dot diameter on a steel plate having a temperature range of room temperature to 300 ° C. without changing the atomizing air pressure, the paint pressure, and the distance to the steel plate, and the paint. As a result of repeated research and experimentation to achieve the realization of a printing method that uses paint, the paint was made into a highly volatile solvent with a boiling point of less than 80 ° C and a medium volatile solvent with a boiling point of 80-150 ° C. If the initial viscosity is 50 to 70 cP and the solvent has a boiling point of more than 150 ° C and less than 220 ° C and a solvent with a boiling point of more than 220 ° C, each solvent with a different boiling point is volatilized stepwise depending on the steel plate temperature. By changing the viscosity, it was possible to suppress the scattering of the paint as much as possible and maintain the dot diameter to be approximately the same to obtain a remarkable knowledge, thereby achieving the technical problem.
前記技術的課題は、次の通りの本発明によって解決できる。 The technical problem can be solved by the present invention as follows.
即ち、本発明に係るアトマイズエアー方式による鋼板印字用ペイントは、無機着色顔料10〜20重量%と被膜形成樹脂10〜30重量%と該被膜形成樹脂の溶解性が良い沸点80℃未満の高揮発性溶剤10〜20重量%と沸点80〜150 ℃の中揮発性溶剤10〜40重量%と沸点が150 ℃を越え220 ℃以下の溶剤10〜30重量%と沸点が220 ℃を越える溶剤5〜10重量%とからなり、且つ、粘度が50〜70cPとなっているものである。 That is, the atomized air printing paint according to the present invention has 10-20% by weight of inorganic color pigment, 10-30% by weight of the film-forming resin, and high volatility with a boiling point of less than 80 ° C. 10 to 20% by weight of volatile solvent and 10 to 40% by weight of volatile solvent with a boiling point of 80 to 150 ° C and 10 to 30% by weight of solvent with a boiling point of over 150 ° C and less than 220 ° C and a solvent with a boiling point of over 220 ° C It consists of 10% by weight and has a viscosity of 50 to 70 cP.
また、本発明に係るアトマイズエアー方式による鋼板印字方法は、無機着色顔料10〜20重量%と被膜形成樹脂10〜30重量%と該被膜形成樹脂の溶解性が良い沸点80℃未満の高揮発性溶剤10〜20重量%と沸点80〜150 ℃の中揮発性溶剤10〜40重量%と沸点が150 ℃を越え220 ℃以下の溶剤10〜30重量%と沸点が220 ℃を越える溶剤5〜10重量%とからなり、且つ、粘度が50〜70cPである鋼板印字用ペイントを流体スプレーノズルから加熱された鋼板に噴射させ、前記沸点の異なる各溶剤を鋼板温度によって段階的に揮発させて粘度を変化させることにより、前記鋼板印字用ペイントの飛散を可及的に抑制して印字するようにしたものである。 In addition, the steel plate printing method using the atomized air method according to the present invention has a high volatility of 10 to 20% by weight of the inorganic color pigment, 10 to 30% by weight of the film-forming resin, and a boiling point of less than 80 ° C. 10 to 20% by weight of solvent and 10 to 40% by weight of volatile solvent with a boiling point of 80 to 150 ° C and 10 to 30% by weight of solvent with a boiling point of over 150 ° C and less than 220 ° C and a solvent of 5 to 10 with a boiling point of over 220 ° C The steel sheet printing paint having a viscosity of 50% to 70 cP is sprayed onto the heated steel plate from the fluid spray nozzle, and the solvents having different boiling points are volatilized stepwise depending on the steel plate temperature. By changing, the scattering of the steel plate printing paint is suppressed as much as possible, and printing is performed.
本発明によれば、沸点の異なる各溶剤を鋼板温度によって段階的に揮発させ、粘度を変化させてペイントの飛散を抑制しているから、アトマイズエアー圧力、ペイント圧力及び鋼板までの距離を変化させなくても温度範囲が常温〜300 ℃の鋼板に対してドット径が略同じに保持された付着力の高いマークを印字することができる。 According to the present invention, each solvent having different boiling points is volatilized stepwise depending on the steel plate temperature, and the viscosity is changed to suppress the scattering of the paint. Therefore, the atomizing air pressure, the paint pressure, and the distance to the steel plate are changed. Even if it is not, it is possible to print a mark having a high adhesive force in which the dot diameter is kept substantially the same on a steel sheet having a temperature range of room temperature to 300 ° C.
従って、本発明の産業上利用性は非常に高いといえる。 Therefore, it can be said that the industrial applicability of the present invention is very high.
以下、本発明の実施の形態について説明する。 Embodiments of the present invention will be described below.
実施の形態1. Embodiment 1 FIG.
本実施の形態に係るアトマイズエアー方式による鋼板印字用ペイントは、粘度が50〜70cPで、且つ、無機着色顔料と被膜形成樹脂と該被膜形成樹脂の溶解性が良い沸点80℃未満の高揮発性溶剤と沸点80〜150 ℃の中揮発性溶剤と沸点が150 ℃を越え220 ℃以下の溶剤と沸点が220 ℃を越える溶剤とから構成されており、溶剤全量はペイント全体量に対して50〜80重量%とするのが好ましく、50重量%未満では固形分が多くなり目的とする粘度が得られず、80重量%を越える量では無機着色顔料と被膜形成樹脂との配合割合が必要量に満たなくなるので好ましくない。また、被膜形成樹脂全量はペイント全体量に対して10重量%以上とするのが好ましく、10重量%未満では粘度が50〜70cPが得られず、付着性が低下するので好ましくない。 The steel plate printing paint by the atomized air method according to the present embodiment has a viscosity of 50 to 70 cP and a high volatility with an inorganic color pigment, a film-forming resin, and a good boiling point of less than 80 ° C. It consists of a solvent, a medium volatile solvent with a boiling point of 80-150 ° C, a solvent with a boiling point of more than 150 ° C and less than 220 ° C, and a solvent with a boiling point of more than 220 ° C. 80% by weight is preferable. If the amount is less than 50% by weight, the solid content increases and the desired viscosity cannot be obtained. If the amount exceeds 80% by weight, the blending ratio of the inorganic coloring pigment and the film-forming resin is the required amount. It is not preferable because it is not satisfied. Further, the total amount of the film-forming resin is preferably 10% by weight or more with respect to the total amount of the paint, and if it is less than 10% by weight, the viscosity of 50 to 70 cP cannot be obtained and the adhesiveness is lowered, which is not preferable.
前記無機着色顔料の色彩は、特に限定されるものではないが、鋼板の表面に印字した場合の目視性の観点から白色が好ましく、無機白色顔料の内でも、隠蔽力に優れたチタン白が適している。無機着色顔料の配合割合はペイント全体量に対して10〜20重量%の範囲内において十分な目視性が得られるので好ましく、10重量%未満の場合には実用できる目視性が得られ難いので好ましくない。 The color of the inorganic coloring pigment is not particularly limited, but white is preferable from the viewpoint of visibility when printed on the surface of the steel sheet, and among the white inorganic pigments, titanium white having excellent hiding power is suitable. ing. The blending ratio of the inorganic coloring pigment is preferable because sufficient visibility is obtained within the range of 10 to 20% by weight relative to the total amount of the paint, and when it is less than 10% by weight, it is difficult to obtain practical visibility, which is preferable. Absent.
前記被膜形成樹脂としては、エチルセルロース樹脂、アセチルブチルセルロース樹脂、熱可塑性アクリル樹脂、ロジンエステル樹脂、マレイン酸樹脂及びシリコーン樹脂の単独又は混合物を使用すればよい。被膜形成樹脂の配合割合はペイント全体量に対して10〜30重量%とするのが好ましく、10重量%未満では目的の粘度が得られず、30重量%を越える量ではペイント全体量に対して溶剤の配合割合が満たなくなるので好ましくない。 As the film forming resin, an ethyl cellulose resin, an acetyl butyl cellulose resin, a thermoplastic acrylic resin, a rosin ester resin, a maleic acid resin, and a silicone resin may be used alone or as a mixture. The blending ratio of the film-forming resin is preferably 10 to 30% by weight based on the total amount of the paint. If the amount is less than 10% by weight, the desired viscosity cannot be obtained, and if it exceeds 30% by weight, the total amount of the paint is Since the blending ratio of the solvent is not satisfied, it is not preferable.
ペイントに使用する溶剤は、沸点80℃未満の高揮発性溶剤と沸点80〜150 ℃の中揮発性溶剤と沸点が150 ℃を越え220 ℃以下の溶剤と沸点が220 ℃を越える溶剤との四つの沸点範囲を満足する溶剤を選択しなければ、温度範囲が常温〜300 ℃の鋼板に対して沸点の異なる各溶剤を鋼板温度によって段階的に揮発させてペイントの粘度を変化させることができない。 Solvents used in paints include high volatile solvents with a boiling point of less than 80 ° C, medium volatile solvents with a boiling point of 80-150 ° C, solvents with a boiling point of more than 150 ° C and less than 220 ° C, and solvents with a boiling point of more than 220 ° C. Unless a solvent satisfying one boiling range is selected, the viscosity of the paint cannot be changed by volatilizing each solvent having a different boiling point stepwise depending on the steel plate temperature with respect to a steel plate having a temperature range of room temperature to 300 ° C.
前記被膜形成樹脂の溶解性が良い沸点80℃未満の高揮発性溶剤としては、沸点56.2℃のアセトン、沸点79.6℃のメチルエチルケトン、沸点57.2℃の酢酸メチル、沸点76.7℃の酢酸エチル及び沸点39.8℃のジクロルメタン等を使用することができ、高揮発性溶剤の配合割合はペイント全体量に対して10〜20重量%である。 As the highly volatile solvent having a boiling point of less than 80 ° C, the film-forming resin has good solubility, acetone having a boiling point of 56.2 ° C, methyl ethyl ketone having a boiling point of 79.6 ° C, methyl acetate having a boiling point of 57.2 ° C, ethyl acetate having a boiling point of 76.7 ° C, and a boiling point of 39.8 ° C Dichloromethane or the like can be used, and the mixing ratio of the highly volatile solvent is 10 to 20% by weight based on the total amount of the paint.
次に、沸点80〜150 ℃の中揮発性溶剤としては、沸点126.6 ℃の酢酸ブチル、沸点135.6 ℃のエチレングリコールモノエチルエーテル、沸点82℃のエチレングリコールジメチルエーテル及び沸点121.2 ℃のテトラクロルエチレンを使用することができ、中揮発性溶剤の配合割合はペイント全体量に対して10〜40重量%である。 Next, as a volatile solvent having a boiling point of 80 to 150 ° C, butyl acetate having a boiling point of 126.6 ° C, ethylene glycol monoethyl ether having a boiling point of 135.6 ° C, ethylene glycol dimethyl ether having a boiling point of 82 ° C, and tetrachlorethylene having a boiling point of 121.2 ° C are used. The mixing ratio of the medium volatile solvent is 10 to 40% by weight based on the total amount of the paint.
次に、沸点が150 ℃を越え220 ℃以下の溶剤としては、沸点156.3 ℃のエチレングリコールモノエチルエーテルアセテート及び沸点192 ℃のエチレングリコールモノブチルエーテルアセテートを使用することができ、当該溶剤の配合割合はペイント全体量に対して10〜30重量%である。 Next, as the solvent having a boiling point exceeding 150 ° C. and not more than 220 ° C., ethylene glycol monoethyl ether acetate having a boiling point of 156.3 ° C. and ethylene glycol monobutyl ether acetate having a boiling point of 192 ° C. can be used, and the blending ratio of the solvent is 10 to 30% by weight based on the total amount of paint.
次に、沸点が220 ℃を越える溶剤としては、沸点244.7 ℃のエチレングリコールモノフェニルエーテル及び沸点246.8 ℃のジエチレングリコールモノブチルエーテルアセテートを使用することができ、当該溶剤の配合割合はペイント全体量に対して5〜10重量%である。 Next, as the solvent having a boiling point exceeding 220 ° C., ethylene glycol monophenyl ether having a boiling point of 244.7 ° C. and diethylene glycol monobutyl ether acetate having a boiling point of 246.8 ° C. can be used. 5 to 10% by weight.
ペイントの粘度は50〜70cPとしなければならない。鋼板温度が常温〜100 ℃の場合において、初期粘度が50cP未満ではアトマイズエアーによるエアー圧力によってペイントのドットが不特定方向へ伸びるから、丸い形のドットを得ることができないので、好ましくなく、70cPを越える粘度ではペイントの吐出量が低下すると共に、アトマイズエアーによる押し広げが起こらずドット径が小さくなるので好ましくない。また、鋼板温度が100 ℃より高い場合において、初期粘度が50cP未満では鋼板の表面で起こる粘度上昇が緩慢となり、特に、高温域において蒸気圧によってペイントが飛散して付着量が低下し、ドット径が小さくなるので好ましくなく、70cPを越える粘度ではペイントが十分な霧状とならず、色の濃さにバラツキのあるドットができるので好ましくない。 The viscosity of the paint must be 50-70 cP. When the steel plate temperature is from room temperature to 100 ° C, if the initial viscosity is less than 50 cP, the dot of paint extends in an unspecified direction due to the air pressure by atomizing air, so it is not preferable because round dots cannot be obtained. Viscosity exceeding this is not preferable because the amount of paint discharged is reduced and the atomization air does not cause spreading and the dot diameter is reduced. In addition, when the steel plate temperature is higher than 100 ° C, when the initial viscosity is less than 50 cP, the increase in viscosity occurring on the surface of the steel plate becomes slow. Is not preferable, and a viscosity exceeding 70 cP is not preferable because the paint does not have a sufficient mist and dots with uneven color density can be formed.
実施の形態2. Embodiment 2. FIG.
本実施の形態に係るアトマイズエアー方式による鋼板印字方法は、無機着色顔料10〜20重量%と被膜形成樹脂10〜30重量%と該被膜形成樹脂の溶解性が良い沸点80℃未満の高揮発性溶剤10〜20重量%と沸点80〜150 ℃の中揮発性溶剤10〜40重量%と沸点が150 ℃を越え220 ℃以下の溶剤10〜30重量%と沸点が220 ℃を越える溶剤5〜10重量%とからなり、且つ、粘度が50〜70cPである鋼板印字用ペイントを流体スプレーノズルから加熱された鋼板に噴射させ、前記沸点の異なる各溶剤を鋼板温度によって段階的に揮発させて粘度を変化させることにより、ペイントの飛散を可及的に抑制して印字するものである。 The steel plate printing method by the atomized air system according to the present embodiment has a high volatility of 10 to 20% by weight of the inorganic color pigment, 10 to 30% by weight of the film-forming resin, and a boiling point of less than 80 ° C. 10 to 20% by weight of solvent and 10 to 40% by weight of volatile solvent with a boiling point of 80 to 150 ° C and 10 to 30% by weight of solvent with a boiling point of over 150 ° C and less than 220 ° C and a solvent of 5 to 10 with a boiling point of over 220 ° C The steel sheet printing paint having a viscosity of 50% to 70 cP is sprayed onto the heated steel plate from the fluid spray nozzle, and the solvents having different boiling points are volatilized stepwise depending on the steel plate temperature. By changing it, the scattering of the paint is suppressed as much as possible and printing is performed.
前記鋼板印字方法では、鋼板の温度が常温〜100 ℃の場合には、ペイントの初期粘度が50〜70cpであるから、アトマイズエアーにより霧状になったペイントが鋼板の表面に付着して丸い形のドットが形成され、アトマイズエアーと沸点80℃未満の高揮発性溶剤によって乾燥が促進される。 In the steel plate printing method, when the temperature of the steel plate is from room temperature to 100 ° C., the initial viscosity of the paint is 50 to 70 cp, so that the atomized paint adheres to the surface of the steel plate to form a round shape. The dots are formed and drying is accelerated by atomized air and a highly volatile solvent having a boiling point of less than 80 ° C.
次に、鋼板の温度が100 ℃より高い場合には、アトマイズエアーによって吐出されたペイントの溶剤成分の内、鋼板の温度より低い沸点の溶剤程、鋼板からの輻射熱により揮発が促進され、初期粘度より高い状態で鋼板に到達する。そして、ペイントが鋼板に到達した直後に前記各溶剤が揮発することで急激な粘度上昇が生じ、このとき、鋼板温度より低い沸点を持つ溶剤の沸騰時における蒸気圧に比較して粘度上昇によるペイントの付着力が高くなるので、沸騰現象による飛散を防止することができる。 Next, when the temperature of the steel plate is higher than 100 ° C, volatilization is accelerated by the radiant heat from the steel plate, the solvent having a boiling point lower than the temperature of the steel plate among the solvent components of the paint discharged by atomized air, and the initial viscosity. Reach the steel plate in a higher state. Then, immediately after the paint reaches the steel plate, the respective solvents volatilize to cause a sudden increase in viscosity. At this time, the paint due to the viscosity increase compared to the vapor pressure at the boiling of the solvent having a boiling point lower than the steel plate temperature. Since the adhesion force of is increased, scattering due to boiling phenomenon can be prevented.
即ち、前記ペイントによれば、鋼板温度が高い程、付着時のペイント粘度は上昇することとなり、蒸気圧によるペイントの飛散が防止されて付着量が一定となってドット径が不揃いにならなず、ドット径が略同じに保持された均一なドットが形成される。 That is, according to the paint, the higher the steel plate temperature, the higher the viscosity of the paint at the time of adhesion, and the scattering of the paint due to vapor pressure is prevented, the amount of adhesion is constant, and the dot diameter does not become uneven. A uniform dot is formed in which the dot diameters are kept substantially the same.
また、ドット塗膜の乾燥は、アトマイズエアーと、鋼板温度近傍の沸点を持つ溶剤とが乾燥を促進させる働きをする。 In addition, when the dot coating is dried, atomized air and a solvent having a boiling point near the steel plate temperature serve to promote drying.
市販のドット印字装置(二流体スプレーノズルを用いたアトマイズエアー方式印字装置:ノズル数7個:商品名:マークテック株式会社製)を用いて本発明に係るペイントを使用して厚さ9mmの鉄板(厚さ×幅×長さ:9×400 ×200mm)を使用して温度範囲が常温〜300 ℃について印字した。印字条件は、印字速度60m /min ,印刷距離(吐出ノズル開口部と被印刷物との距離)15mmとした。 A 9 mm thick iron plate using the paint according to the present invention using a commercially available dot printing device (atomized air type printing device using a two-fluid spray nozzle: number of nozzles: 7: product name: manufactured by Marktec Co., Ltd.) (Thickness × width × length: 9 × 400 × 200 mm) was used, and the temperature range was from room temperature to 300 ° C. The printing conditions were a printing speed of 60 m / min and a printing distance (distance between the discharge nozzle opening and the substrate) of 15 mm.
前記ペイントは、無機着色顔料として酸化チタン(チタン白)を使用し、被膜形成樹脂としてアセチルブチルセルロース樹脂(CAB381-05 :型番:イーストマンコダック社製)と熱可塑性アクリル樹脂(BR106 :型番:三菱レーヨン社製)とシリコーン樹脂(KR220 :型番:信越化学社製)とを使用し、沸点80℃未満の高揮発性溶剤としてアセトンとメチルエチルケトンとを使用し、沸点80〜150 ℃の中揮発性溶剤として酢酸ブチルとエチレングリコールモノエチルエーテルとを使用し、沸点が150 ℃を越え220 ℃以下の溶剤としてエチレングリコールモノエチルエーテルアセテートとエチレングリコールモノブチルエーテルアセテートとを使用、沸点が220 ℃を越える溶剤としてエチレングリコールモノフェニルエーテルを使用した構成とした。 The paint uses titanium oxide (titanium white) as an inorganic coloring pigment, and acetylbutylcellulose resin (CAB381-05: model number: manufactured by Eastman Kodak Company) and thermoplastic acrylic resin (BR106: model number: Mitsubishi) as a film-forming resin. A medium volatile solvent with a boiling point of 80-150 ° C, using acetone and methyl ethyl ketone as a highly volatile solvent with a boiling point of less than 80 ° C, using a rayon) and silicone resin (KR220: model number: Shin-Etsu Chemical) Butyl acetate and ethylene glycol monoethyl ether are used as solvents, and the boiling point is higher than 150 ° C and lower than 220 ° C. Ethylene glycol monoethyl ether acetate and ethylene glycol monobutyl ether acetate are used as solvents with boiling points higher than 220 ° C. It was set as the structure which used ethylene glycol monophenyl ether.
表1及び表2に前記印字条件とペイント成分構成による実施例と比較例と示し、各実施例と各比較例による文字品質とドット径(mm)との結果を表3及び表4に示した。なお、表3及び表4において、評価「○」はドット径が略同じに保持され均一で良好、評価「△」はドットの径が不均一で不定形、評価「×」はドットが微細な点々でマークを形成しないことを表している。 Tables 1 and 2 show examples and comparative examples according to the printing conditions and paint component configurations, and Tables 3 and 4 show the results of character quality and dot diameter (mm) according to the examples and comparative examples. . In Tables 3 and 4, the evaluation “◯” indicates that the dot diameter is substantially the same and is uniform and good, the evaluation “Δ” indicates that the dot diameter is non-uniform and irregular, and the evaluation “×” indicates that the dot is fine. It represents that a mark is not formed with dots.
実施例1〜5において、ドット径4.5 〜5mmの範囲内に保持され均一で付着力が高く良好なマークが得られた。 In Examples 1 to 5, good marks were obtained that were held within a dot diameter range of 4.5 to 5 mm and were uniform and had high adhesion.
本発明に係るペイントを使用すれば、温度範囲が常温〜300 ℃の鋼板に対してペイントのドット径を略同じに保持して印字できるから、温度センサーや各種制御機構を備えない安価なアトマイズエアー方式によるドット印字装置を利用できる。 If the paint according to the present invention is used, it is possible to print the steel plate having a temperature range of room temperature to 300 ° C. while keeping the dot diameter of the paint substantially the same, so an inexpensive atomized air that does not have a temperature sensor or various control mechanisms. A dot printing device based on this method can be used.
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JP5803514B2 (en) * | 2011-09-29 | 2015-11-04 | Jfeスチール株式会社 | Painted steel with excellent laser cutting ability, primary rust prevention and visibility |
JP6731271B2 (en) * | 2016-04-06 | 2020-07-29 | マークテック株式会社 | Resin composition for paint |
JP6972536B2 (en) * | 2016-11-04 | 2021-11-24 | 凸版印刷株式会社 | Coating agent and discharge |
KR102077892B1 (en) | 2017-07-07 | 2020-02-14 | 마크텍 가부시키가이샤 | Aqueous coating material for steel and solubilizer for dried coating film of the aqueous coating material |
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