CN103086744B - Organic dry powder electrostatic spraying technology on surfaces of building ceramic products - Google Patents
Organic dry powder electrostatic spraying technology on surfaces of building ceramic products Download PDFInfo
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- CN103086744B CN103086744B CN201310004864.6A CN201310004864A CN103086744B CN 103086744 B CN103086744 B CN 103086744B CN 201310004864 A CN201310004864 A CN 201310004864A CN 103086744 B CN103086744 B CN 103086744B
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Abstract
The invention provides an organic dry powder electrostatic spraying technology on the surfaces of building ceramic products. The organic dry powder electrostatic spraying technology on the surfaces of the building ceramic products comprises the following steps of: spraying organic dry powder coatings from a spraying gun; adsorbing the organic dry powder coatings with charges opposite to that of green bodies on the surfaces of the green bodies tightly under an electrostatic effect through electrostatic fields with high voltages between surfaces of the spraying gun and to-be-sprayed green bodies of the building ceramic products; and then baking the green bodies at low temperature for certain period of time, thereby combining the organic dry powder coatings and the green bodies integrally so as to achieve the aim of decoration. Organic facing manufactured by the production technology can form colorful veins beyond comparison of the traditional ceramic facing, and integral individualization decoration can be formed, and the applicable product range is wide. Moreover, products treated by the technology have multiple effects of antibiosis, electrostatic resistance, scratching resistance, high-temperature resistance, light pollution reduction, thermal reflection, leather touch and the like.
Description
Technical field
The invention provides a kind of technique of organic dry powder paint being carried out to application by electrostatic painting process at architectural pottery product surface, belong to construction sanitary ceramic decoration technique field.
Background technology
Construction sanitary ceramic decoration technique refers to apply ceramic decoration material---and colour glaze and base substrate processing technology are carried out technical finesse to construction sanitary ceramic product surface, thereby make goods reach the effect of functional, practicality and artistry, meet people's needs.Decoration technique can be strengthened the artistic effect of construction sanitary ceramic goods, improve performance and the class of goods, quality to goods and moulding play a part to set off, beautify, and play a part very important to the total quality that improves China's construction sanitary ceramic product.
Architectural pottery goods mainly comprise ceramic exterior wall brick (plate), ceramic inner wall brick (plate), floor tile (plate), ceramic smallpox sheet material, roof porcelain watt, sintered tiles, terra-cotta etc.In China, the billet surface decorative effect of these goods is adopted to the processing of wet method glazing decoration technique conventionally.Common glazing process has glaze spraying, gets rid of glaze, drenches glaze, brushing glazing and soak glaze, and people select glazing mode and glaze slip parameter according to the kind of base substrate, character, size and dimension and working condition conventionally.
Wherein glaze spraying technique is application glaze spraying device---the colour glaze atomization that spray gun contains certain moisture by pressurized air handle, be sprayed at the surface of goods base substrate, through certain high temperature sintering, make the complete combination of colour glaze and base substrate, reach the decoration technique of decorative purpose.It is a kind of inorganic materials wet method glazing decoration technique.
Summary of the invention
The object of this invention is to provide a kind of technique of carrying out organic electrostatic dry powder spraying at architectural pottery product surface, organic facing of production technique manufacture can form the incomparable colorful texture of traditional ceramics facing thus, and can realize overall individual decoration.
Technique of the present invention is: the present invention utilizes dry powder paint spray gun, by organic resin powder coating by spraying in spray gun, under electrostatic interaction, be tightly adsorbed in billet surface, then base substrate is carried out to low-temperature bake, make the melting of organic resin powder coating, levelling, solidify, form hard film in billet surface, make the complete combination of organic resin powder coating and base substrate, then base substrate is carried out coolingly, must there is the ceramic of decorative effect.
Wherein organic resin powder coating is made up of 74%～76% organic resin, 0.8%～1% colorant, 19%～21% filler, 2%～4% auxiliary agent.
Wherein storing temperature is no more than 250 DEG C, and the time is 5 minutes～15 minutes.
The general size distribution of described toner coating is: D10:9.77 μ m, D50:42.56 μ m, D90:88.60 μ m; Median size is 30～40 μ m, relative density 1.2～1.7.
Described organic resin is epoxy resin or vibrin.
Described colorant is divided into pigment dyestuff and mineral dye, and mineral dye is carbon black, titanium dioxide or ferric oxide, and pigment dyestuff is that phthalocyanine blue, quinacridone are red, pyrrolopyrrole is red, pyrrolopyrrole is red, benzimidazolone is orange or isoindolinone is yellow.
Described filler is barium sulfate or calcium carbonate.
Described auxiliary agent is aluminium powder, copper powder, mica, tetrafluoroethylene wax powder, CAB resin, glycoluril resin, polyacrylic ester, polyethers, silicone, composite salt, polyprotonic acid mixture, GMA resin, polyethylene wax, quaternary ammonium salt, polarity fat acid resin or soap.
The present invention is a kind of organic materials dry method electrostatic spraying decoration technology of novelty, with the difference of inorganic materials wet method glazing decoration technology as shown in the following chart:
Spraying and decorating technique of the present invention also has following characteristics:
1. applicable product scope is wider, is not only applicable to ceramic tile (plate) series products of surfacing, as ceramic exterior wall brick (plate), ceramic inner wall brick (plate), floor tile (plate), ceramic smallpox sheet material; And be applicable to special-shaped building ceramic decoration material, as roofing tile, sintered tiles, terra-cotta etc.
2. the dry powder paint that used belongs to pure solid, and not containing solvent material,, containing poisonous chemical and heavy metal, carbon compound burst size is not low, pollutes so do not have obnoxious flavour.
Through the product of functional technical finesse have antibacterial, antistatic, scratch resistance, high temperature resistant, reduce the multi-effects such as light pollution, heat reflection, leather sense of touch.
This technique also has the following advantages simultaneously:
1. energy-conservation: firing temperature is low, can replace the twice firing of some ceramics.
2. reduce discharging: technique manufacturing processed low-carbon emission, non-volatile thing VOC, non-wastewater discharge, noiselessness produces, the recyclable circulation of dry powder paint.
3. environmental protection: dry powder paint does not contain solvent material, not leaded cadmium and heavy metal, "dead" material.
4. efficient: this Technology can realize automatic continuous production, from biscuit to finished product, only in 15 minutes, complete, with short production cycle.
Brief description of the drawings
Fig. 1 is size-grade distribution schematic diagram.
Fig. 2 is electrostatic coating principle schematic.
Fig. 3 is coating process schematic diagram.
Fig. 4 is baking film forming schematic diagram.
Fig. 5 is process flow sheet of the present invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing
As shown in Figure 5, the present invention utilizes dry powder paint spray gun, by organic resin powder coating by spraying in spray gun, under electrostatic interaction, be tightly adsorbed in billet surface, then base substrate carried out to low-temperature bake, make the melting of organic resin powder coating, levelling, solidify, form hard film in billet surface, make the complete combination of organic resin powder coating and base substrate, then base substrate is carried out coolingly, must there is the ceramic of decorative effect.The present invention is a kind of organic materials dry method electrostatic spraying decoration technology of novelty, and electrostatic spraying is to utilize corona discharge phenomenon to make organic resin powder coating be adsorbed on billet surface.As shown in Figure 2, its process is: organic resin powder coating borrows pressurized air to send into spray gun by powder-supply system, be added with at spray gun front end the high pressure that HV generator produces, nozzle place current potential is-12KV is to-80KV, adjust according to different base substrates and environment, base substrate ground connection, fine pores wherein has electric action, and (many empty structures give base substrate certain water-intake rate, water can be used as conducting material and is attached to billet surface), billet surface current potential is 0KV.Due to corona discharge, near spray tip, produce intensive electric charge, when organic resin powder is sprayed by rifle mouth, form charged dry powder paint particle, it is subject to the effect of electrostatic force, is drawn onto billet surface.As shown in Figure 3, along with the powder of spraying increases, electric charge gathers also more, in the time reaching certain thickness, owing to producing electrostatic repulsion, does not just continue absorption, thereby makes whole base substrate obtain certain thickness powder coating.
As shown in Figure 4, low-temperature bake is the base substrate that application completes to be put into baking oven be heated and make powder melts, levelling, curing through baking, forms hard film in billet surface.General 210 DEG C～220 DEG C time, toast 5 minutes or 180 DEG C～190 DEG C baking after 10 minutes base substrate become finished product after cooling.
Wherein the general size distribution of organic resin powder coating is: D10:9.77 μ m, D50:42.56 μ m, D90:88.60 μ m; Median size is 30～40 μ m; Relative density 1.2～1.7.As shown in Figure 1.
Wherein the formula of organic resin powder coating is:
The effect of organic resin is mainly to provide into membrane carrier, and organic resin is generally selected epoxy resin or vibrin.
Epoxy resin is powder coating special epoxy resin, is solid state under normal temperature, mean polymerisation degree general n=4, average oxirane value Ev=0.12mol/100g.
Vibrin can select type more, mainly comprises containing carboxyl solid polyester resin and hydroxyl solid polyester resin.Between general molecular weight 2000-8000.According to different application environmental requirement, can select dissimilar vibrin.
The effect of colorant is mainly to provide color, and colorant is generally selected pigment dyestuff and mineral dye, neither containing objectionable impuritiess such as heavy metals.Mineral dye is generally selected carbon black, titanium dioxide, ferric oxide etc.Pigment dyestuff is generally selected phthalocyanine blue, quinacridone is red, pyrrolopyrrole is red, pyrrolopyrrole is red, benzimidazolone is orange, isoindolinone is yellow etc.
The effect of filler is mainly to provide opacifying power, and filler is generally selected the inorganics such as barium sulfate or calcium carbonate.
The effect of auxiliary agent is mainly to provide functional result, and such as antibacterial, heat reflection, produces special decorative pattern etc., and improves final film performance and effect.
Such as the flow agent that improves appearance has polyacrylic ester, polyethers and silicone etc.; The matting agent that reduces surface luster has composite salt, polyprotonic acid mixture, GMA resin and polyethylene wax etc.; The electrostatic agent that improves powder coating charging property has quaternary ammonium salt, polarity fat acid resin and soap etc.
Such as producing the tetrafluoroethylene wax powder of sand streak effect; Produce the CAB resin of hammer tone effect; Produce the glycoluril resin of wrinkle effect etc.; Form the texture agent of special decorative pattern; The metal effect pigments and the pearl mica effect pigment that form special-effect, metal effect pigments is commonly used aluminium powder, copper powder forms by dispersion processing; Pearl mica effect pigment, contains sheet or spherical mica, and observation from different perspectives can show distinct colors and effect.
Provide two product examples in conjunction with concrete enforcement now:
Embodiment 1:
The formula of organic resin powder coating is epoxy resin 75.0%, titanium dioxide 0.5%, and quinacridone is red 0.4%, barium sulfate 20.8%, polyacrylic ester 1.2%, tetrafluoroethylene wax powder 1.0%, glycoluril resin 0.6%, aluminium powder 0.5%.
Low-temperature bake: toast 220 DEG C time 5 minutes.
Embodiment 2:
The formula of organic resin powder coating is vibrin 75.0%, ferric oxide 0.2%, phthalocyanine blue 0.7%, barium sulfate 20.8%, polyethers 0.3%, polyethylene wax 0.3%, tetrafluoroethylene wax powder 0.7%, glycoluril resin 0.5%, copper powder 1.5%, mica 0.2%.
Low-temperature bake: 180 DEG C are toasted 10 minutes.
Below correlation detection data:
Physical testing:
| Test performance | Testing method | Test result or number pick |
| Resistance to bend(ing) | CB/T1185、AS1580402.1,ISO9227 | Pass through 3mm |
| Adhere to | GB/T9286、AS1580408.4 | By more than 1 grade |
| Cupping | BS3900-E4、ISO1520 | Pass through 7mm |
| Pencil hardness | AS1580405.1 | Minimum F level |
| Recoil is hit | CB/T1732、AS3715Section2.8 | Pass through 2.5mm |
| Heat-shock resistance | GB/T3810.9 | Without bursting and crackle |
| Anti-glaze fragility | CB/T3810.11 | Split without glaze |
| Frost resistance | CB/T3810.12 | Flawless and peeling off |
Chemistry and weather resisteant can be tested:
Claims (1)
1. one kind is carried out the technique of organic electrostatic dry powder spraying at architectural pottery product surface, it is characterized in that organic resin powder coating by spraying in spray gun, under electrostatic interaction, be tightly adsorbed in billet surface, then base substrate is carried out to low-temperature bake, make the melting of organic resin powder coating, levelling, solidify, form hard film in billet surface, make the complete combination of organic resin powder coating and base substrate, then base substrate is carried out coolingly, must there are the architectural pottery goods of decorative effect;
Wherein organic resin powder coating borrows pressurized air to send into spray gun by powder-supply system, is added with at spray gun front end the high pressure that HV generator produces, nozzle place current potential be-12KV extremely-80KV, base substrate ground connection, billet surface current potential is 0KV;
Wherein storing temperature is no more than 250 DEG C, and the time is 5 minutes ~ 15 minutes;
Wherein the general size distribution of organic resin powder coating is: D10:9.77 μ m, D50:42.56 μ m, D90:88.60 μ m; Median size is 30～40 μ m, relative density 1.2～1.7;
Described organic resin powder coating is made up of 74%～76% organic resin, 0.8%～1% colorant, 19%～21% filler, 2%～4% auxiliary agent, and organic resin is epoxy resin or vibrin;
Described filler is barium sulfate or calcium carbonate;
Described auxiliary agent is aluminium powder, copper powder, mica, tetrafluoroethylene wax powder, CAB resin, glycoluril resin, polyacrylic ester, polyethers, silicone, polyprotonic acid mixture, GMA resin, polyethylene wax, polarity fat acid resin or soap.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3293232A1 (en) * | 2016-09-08 | 2018-03-14 | IGP Pulvertechnik AG | Powder paint and method of preparing a powder paint |
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| CN103289524A (en) * | 2013-05-23 | 2013-09-11 | 天津翔盛粉末涂料有限公司 | Special decorative powder coating for glass wine bottle and ceramic vessel and application |
| CN105713482A (en) * | 2015-12-18 | 2016-06-29 | 广州源辉化工有限公司 | Powder coating on magnalium and PPS (polyphenylene sulfite) spliced substrate and spraying method of powder coating |
| CN113912422B (en) * | 2021-09-17 | 2023-03-28 | 佛山市三水区康立泰无机合成材料有限公司 | Antibacterial ceramic tile and preparation method thereof |
| CN114054323A (en) * | 2021-10-29 | 2022-02-18 | 安徽兆鑫铝业科技有限公司 | Preparation method of baking-free glazed aluminum alloy curtain wall board |
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| US8178160B2 (en) * | 2006-01-20 | 2012-05-15 | Ppg Industries Ohio, Inc. | Decorative and durable coating having a homogeneous hue, methods for their preparation, and articles coated therewith |
| CN101311234B (en) * | 2007-05-22 | 2010-12-01 | 马晓兵 | Metal flashing powder coatings and preparation method thereof |
| CN102173761B (en) * | 2011-01-01 | 2013-04-24 | 蔡锋盛 | Ceramic clay used for powder paint decoration and production method of powder paint decorative ceramic prepared from same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3293232A1 (en) * | 2016-09-08 | 2018-03-14 | IGP Pulvertechnik AG | Powder paint and method of preparing a powder paint |
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