CN1892169A - Aluminium fin material - Google Patents
Aluminium fin material Download PDFInfo
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- CN1892169A CN1892169A CN 200610094118 CN200610094118A CN1892169A CN 1892169 A CN1892169 A CN 1892169A CN 200610094118 CN200610094118 CN 200610094118 CN 200610094118 A CN200610094118 A CN 200610094118A CN 1892169 A CN1892169 A CN 1892169A
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Abstract
An aluminum fin material of the present invention comprises a substrate formed by aluminum or an aluminum alloy, an anticorrosive film of inorganic oxide or organic-inorganic composite compound formed on the substrate, a resin anticorrosive film of 0.5-10 um formed on the film, and a hydrophilic film of 0.1-10 um of hydrophilic resin formed on the film. The resin anticorrosive film is formed of at least one resin selected from urethane resin, epoxy resin, polyester resin and vinyl chloride resin, and the resin contains, to 100 percentages by weight of the resin, 0.1-100 percentages by weight of zinc pyrithione with average diameter of 0.01-1.0 um.
Description
Technical field
The present invention relates to a kind of aluminium fin material that constitutes by aluminum or aluminum alloy, wherein form coating in its surface, particularly, relate to a kind of aluminium fin material that is used for heat exchanger, it is being excellent aspect fungi and the vegetative inhibition, and is fit to this application of the heat-exchanger fin of this room conditioning.
Background technology
Heat exchanger is used for various fields, with room conditioning, self-contained air-conditioning (package aircon), refrigeration show cabinet, oil cooler and radiator as representative.So, in the heat exchanger of this room conditioning and self-contained air-conditioning, aluminum is used for its fin, because this material has excellent thermal conductivity and machinability.
For the generation that prevents to corrode, on the surface of heat-exchanger fin, carry out anti-corrosion treatment.In addition, rest in cooling down operation between the fin in order to prevent condensed water, improve hydrophilic surface treatment on this surface, described hydrophily has improved following performance of granular droplet.
If on the aluminum surface, improve hydrophilic surface treatment, can reduce to be attached to the contact angle of the droplet of the fin that constitutes by aluminum.Fig. 2 is the schematic diagram of the contact angle of the droplet on the display plane; Fig. 3 is the perspective schematic view that shows the heat-exchanging part of heat exchanger.As shown in Figure 2, contact angle θ is meant the angle that forms between the tangent line 11 of the droplet W that occurs by plane 10 with from the plane 10 at lip-deep some A of droplet W; θ is more little for contact angle, and moisture film (droplet) becomes thin more; And it is good more that hydrophily becomes.In the heat-exchanging part of this heat exchanger shown in Fig. 3, though because cold-producing medium flows in the direction shown in the arrow of copper pipe 7 inside, seem to have passed fin 6, but droplet condensation on the surface of fin 6, and following performance of droplet becomes better under the situation of excellent hydrophilic.As a result, can prevent to uprise, and obtain excellent heat exchanger characteristic owing to the blowing resistance that moisture film and droplet attached to fin 6 cause.
Fig. 4 A to 4C is the schematic diagram that is presented at the droplet attachment state on the fin surface respectively.Among Fig. 4 A, downwards arrow length is to be directly proportional with the distance of following of droplet in regular time.As shown in Fig. 4 A, under the situation of the good fin 6a of hydrophily, because contact angle is littler, droplet W is easily along following of fin 6a.As a result, because droplet W does not hinder air-flow, gas-flow resistance descends.On the other hand, as shown in Fig. 4 B, in the heat exchanger of its fin hydrophily difference, droplet W rests on the fin 6b; And as shown in Fig. 4 C, droplet W contacts and stops with adjacent fin 6c; Therefore, droplet W hinders air-flow and gas-flow resistance obviously to improve.
Here, if all contaminations that in using the environment of air-conditioning, exists, for example plasticizer for example O-phthalic di-isooctyl and the lubricant that is used for plastics for example palmitic acid, stearic acid and paraffinic be attached to fin, then its hydrophily is tended to worsen.Therefore, preferred hydrophilic surface treatment (hydrophilic coating) even its pollutant adheres to does not also worsen.In addition, in hydrophilic coating, exist inorganic particles for example under the situation of silica, because in formation and work fin, tend to occur tool wear, and cause the peculiar foreign flavor of silica dioxide coating is occurred, preferably carry out hydrophily and handle by the organic resin coating.
As a kind of means that solve all problems, in Japan Patent No.3383914 (claim 1, the 00035th section, and Fig. 4) in, described and a kind ofly had the excellent persistent heat exchanger of hydrophily aluminium fin under the pollutant adhering to: wherein on the base material that constitutes by aluminum or aluminum alloy, formed the erosion shield that constitutes by inorganic oxide or organic and inorganic complex; On erosion shield, form by containing its molecule and contain the polyacrylic acid of water-soluble resin of hydroxyl or the hydrophilic coating that polyacrylate constitutes; And on hydrophilic coating, be formed on the water-soluble resin coating that its molecule contains hydroxyl.
On the other hand, when the cooling air-conditioning, take place because be condensate in the heat exchanger, room air adjusting machine inside remains in the atmosphere of high humility for a long time thus, and fungi tends to breeding (referring to Fungal Contamination of Air Conditioners, Nobuo HAMADA and AkioYAMADA, Bokin Bobai, Vol.21, No.7, the the 385th to 389 page, 1993).In addition, it was noted that regulating the inner fungi roe deer that breeds of machine at room air is discharged from (referring to Fungal Index and Contamination in Air Conditioners When cooled from air conditioner, KeikoABE, Journal of Society of Indoor Environment Japan, Vol.1, No.1, the 41st to 50 page, 1998).It was noted that the discharge that the fungi roe deer is regulated machine from room air has the allergy of causing possibility (referring to Enumeration of Airborne Micro-Organisms in WorkEnvironments, B.Crook and J.Jacey, Environ.Technol.Lett., Vol.9, the 515th to 520 page (1988); Molds in house environments and the health problem, Kosuke TAKATORI, J.Natl.Inst.Public Health, Vol.47, the 13rd to 18 page, 1988), and the problem that exists is that the comfortableness when using air-conditioning is damaged.In addition, it is reported that VOC derived from microorganism is owing to fungus breeding occurs, this may be a reason (the Study on Chemical Substance Derived From True FungusWithin Air Conditioner of foreign flavor, PAKU Shunshaku, Koichi IKEDA and Shuji FUJII, Collected Lecture Papers at Academic Lecture Presentation of AirConditioning and Sanitary Engineering Academic Society, the the 1273rd to 1276 page, 2001).
About the problems referred to above, in Japan Patent No.2934917 (claim 1, the 0024th and 0049 section, and Fig. 3), a kind of heat-exchanger fin material has been described, the powder that comprises zinc material and the hydrophilic coating of antibacterial agent wherein are provided, give antimycotic and antibacterial activity thus.In addition, (the 0009th to 0013 section of Japanese Patent Laid-Open Publication No.2000-171191, a kind of aluminum alloy fin is described Fig. 1), wherein comprise two (2-pyridylthio)-zinc-1 that antimycotic particle diameter with one of antibacterial agent is 1 to 10 μ m in formation, after the water-soluble resin coating of 1 '-dioxide (so-called 2-mercaptopyridine zinc oxide), on the surface of water-soluble resin coating, form hydrophilic coating.
But, described in Japan Patent No.2934917, in hydrophilic coating, comprise under the situation of antimycotic and antibacterial agent, because giving usually under the better hydrophilic situation, hydrophilic coating is soluble in water, although trace, this reagent are owing to the condensed water that occurs in cooling down operation tends to flow out, thereby the problem that exists is antimycotic and antibacterial activity is not lasting.In addition, adding resolutely under the situation of certain curing agent in order to suppress to flow out, the problem of existence is, tends to worsen as the hydrophily of the important performance of air-conditioner fin material.This is because usually, the solubility in this antimycotic and antibacterial agent that can keep in coating in water is very little, thus hydrophilic harmful effect is become big.
In addition, in the fin material in Japanese Patent Laid-Open Publication No.2000-171191, because the particle diameter of 2-mercaptopyridine zinc oxide is bigger, the problem that exists is, because long-term cooling down operation, the 2-mercaptopyridine zinc oxide tends to drop with original particle state from the surface of fin material, and antimycotic not lasting with antibacterial activity.In addition, because the heat in forming (be coated with and bake and bank up with earth) hydrophilic coating, promoted the thermal decomposition of 2-mercaptopyridine zinc oxide, and antimycotic and antibacterial activity tends to reduce, and heat becomes a reason of generation foreign flavor defective from thermal decomposition product itself.
Therefore, need wherein hydrophily and the antimycotic and aluminium fin material antibacterial activity last very long consumingly.
Summary of the invention
Result as their further investigation of the present inventor, be effective below they find: select the 2-mercaptopyridine zinc oxide as antimycotic and antibacterial agent, the 2-mercaptopyridine zinc oxide is included in the hydrophilic coating, and provide the coating that contains the 2-mercaptopyridine zinc oxide, hydrophilic coating is provided then independently.
In other words, the aluminium fin material that the present invention relates to comprises: the base material that is made of aluminum or aluminum alloy; The erosion shield that constitutes by inorganic oxide or organic and inorganic complex that on base material, forms; The coating layer thickness that forms on erosion shield is the anti-corrosion resin coating of 0.5 to 10 μ m; With the coating layer thickness that on the anti-corrosion resin coating, forms be the hydrophilic coating that constitutes by hydrophilic resin of 0.1 to 10 μ m, wherein the anti-corrosion resin coating is by at least a resin that constitutes in urethane resin, epoxy resin, mylar and the vinyl chloride resin, and for described a kind of resin of 100 weight portions, the mean particle diameter that comprises 0.1 to 100 weight portion is the 2-mercaptopyridine zinc oxide of 0.01 to 1.0 μ m.
Constitute according to this,, improved the antimycotic and antibacterial activity of fin material owing to formed the anti-corrosion resin coating that comprises the 2-mercaptopyridine zinc oxide.Owing on the anti-corrosion resin coating, formed hydrophilic coating, even on the surface of aluminium fin material, formed condensed water, the 2-mercaptopyridine zinc oxide also is not easy to flow out, and remain on the inside of anti-corrosion resin coating for a long time, hydrophilic coating becomes and is independent of the anti-corrosion resin coating, can prevent that thus the 2-mercaptopyridine zinc oxide from producing harmful effect to the hydrophily of hydrophilic coating.Because the coating layer thickness and the 2-mercaptopyridine zinc oxide content of anti-corrosion resin coating are defined in the predetermined scope, mean particle diameter is that the 2-mercaptopyridine zinc oxide of 0.01 to 1.0 μ m can not be exposed to the anti-corrosion resin coating surface that coating layer thickness is 0.5 to 10 μ m, and tends near enrichment coating surface.This obtains promoting by the heat that forms the hydrophilic coating amount.By constituting the anti-corrosion resin coating that does not have predetermined hydrophilic resin, discharge the 2-mercaptopyridine zinc oxide that in resin, comprises gradually.Be defined in the predetermined scope by mean particle diameter the 2-mercaptopyridine zinc oxide, the decomposition and the distillation of the 2-mercaptopyridine zinc oxide that causes by forming the heat in the anti-corrosion resin coating have been prevented, make the 2-mercaptopyridine zinc oxide drop from the anti-corrosion resin coating in long-term cooling down operation, being difficult to, can dissolve the 2-mercaptopyridine zinc oxide gradually thus with original particle state.By between base material and anti-corrosion resin coating, forming erosion shield, improved the contact between them, prevent further that also the 2-mercaptopyridine zinc oxide from dropping with its static particle state, and give the fin material Corrosion Protection.By on the outmost surface of fin material, forming the hydrophilic coating of predetermined coating layer thickness, give the fin hydrophily.
In addition, in the aluminium fin material that the present invention relates to, hydrophilic coating comprises at least a in carboxyl, hydroxyl, sulfonic group, amido link, ehter bond and their salt.Constitute according to this, further improved the hydrophily of fin material.
In addition, it is the water-soluble coating of 0.1 to 10 μ m that the aluminium fin material that the present invention relates to also is included in the coating layer thickness that forms on the hydrophilic coating, and described water-soluble coating is made of the water-soluble resin that contains hydroxyl at its molecule.According to this formation, because water-soluble coating is dissolved in condensate gradually in cooling down operation, the processing oil that keeps on the fin surface in the pressure processing when making fin is rinsed.Therefore, further improved the hydrophily of fin material.In addition, absorb moisture, in pressure processing, can suppress the defective that metal stamping and pressing and fin material (hydrophilic coating) adhere to mutually by hydrophilic coating.
Description of drawings
Figure 1A is the profile that schematically shows the section of a kind of aluminium fin material that the present invention relates to; Figure 1B is the profile of another kind of aluminium fin material.
Fig. 2 is the schematic diagram of the contact angle of the droplet on the display plane.
Fig. 3 is the perspective view that schematically shows the heat-exchanging part of heat exchanger.
Fig. 4 A to 4C is the schematic diagram that shows droplet attachment state on the fin surface respectively.
The specific embodiment
Here embodiment of the present invention will be described.
Shown in Figure 1A, aluminium fin material (hereinafter referred to as fin material) 1 comprises base material 2, at the erosion shield 3 that forms on the base material 2, at anti-corrosion resin coating 4 that forms on the erosion shield 3 and the hydrophilic coating 5 that forms on anti-corrosion resin coating 4.In addition, shown in Figure 1B, fin material 1 ' also is included in the hydrophilic coating 8 that forms on the hydrophilic coating 5.Here, " on base material 2 " is meant any (not shown) in one side and the two sides.Below every kind of formation will be described.
＜base material 〉
Base material 2 is the sheet materials that are made of aluminum or aluminum alloy, and owing to have excellent thermal conductivity and machinability, therefore uses 1000 series aluminum of stipulating among the JIS H4000, preferred aluminium alloy No.1200.Simultaneously,, consider such intensity, thermal conductivity and machinability, use sheet thickness to be about 0.08 to 0.3mm sheet material being used for the aluminum fin material tablet of heat exchanger.
＜erosion shield 〉
Erosion shield 3 is made of inorganic oxide or organic and inorganic complex.Preferred inorganic oxide comprises chromium (Cr) and the zirconium (Zr) as key component, and any erosion shield 3 that forms in for example handling by phosphate-chromate processing, phosphate-zirconium processing, chromate-chromate; But in the present invention, if any coating is brought anticorrosive property, erosion shield 3 is not limited thereto, and can be for example handles and phosphate-titanate be handled and forms by phosphate-zinc.In addition,, can enumerate for example acryloyl group-zirconium composite material, and handle or the application type zirconium is handled and formed the erosion shield 3 that is made of this acryloyl group-zirconium composite material by the application type chromate as the organic and inorganic complex.
Though preferred erosion shield 3 comprises 1 to 100mg/m
2Cr or Zr, and its coating layer thickness is preferably 10 to 1,000 , but much less these can change aptly, thereby is complementary with certain application target.Because the formation of erosion shield 3, improved the contact between base material 2 and resinous coat 3 and coating 3 and the anti-corrosion resin coating 4, prevent that the 2-mercaptopyridine zinc oxide from dropping from resinous coat 4, and the antimycotic and antibacterial activity of fin material 1,1 ' is lasting.Therewith together, give fin material 1,1 ' anticorrosive property.
＜anti-corrosion resin coating 〉
Anti-corrosion resin coating 4 is made of at least a in urethane resin, epoxy resin, mylar and the vinyl chloride resin; Its coating layer thickness is 0.5 to 10 μ m, and comprising mean particle diameter is the 2-mercaptopyridine zinc oxide of 0.01 to 1.0 μ m, and for described a kind of resin of 100 weight portions, the amount of 2-mercaptopyridine zinc oxide is 0.1 to 100 weight portion.Because the formation of anti-corrosion resin coating 4 is given fin material 1,1 ' the antimycotic and antibacterial activity.
Constitute by at least a in urethane resin, epoxy resin, mylar and the vinyl chloride resin of possess hydrophilic property not by anti-corrosion resin coating 4, for example by urethane resin, epoxy resin, or the mixture of epoxy resin and mylar formation, cause the 2-mercaptopyridine zinc oxide particle J that describes after a while to be disposed to hydrophilic coating 5 gradually from coating 4.
The 2-mercaptopyridine zinc oxide is to have the antibacterial agent of wide spectrum bacteria resistance and to any effectively (referring to Cosmetic and Drug Preservation Principles andPractice, Cosmetic Science and Technology Series in bacterium and the fungi; The the 93rd to 104 page (1990); Original text editor John J.CABARA; Translator Koichi YOSHIMURA and HirofumiTAKIGAWA; The Fragrance Journal of publisher).
The average diameter of regulation 2-mercaptopyridine zinc oxide particle J is that the reason of 0.1 to 1.0 μ m is as follows: if diameter, is made 2-mercaptopyridine zinc oxide self difficulty less than 0.1 μ m, and the 2-mercaptopyridine zinc oxide lacks practicality; If diameter surpasses 1.0 μ m, tend to when forming hydrophilic coating 5 (be coated with, cure), improve by the thermal decomposition that heat causes, and cause 2-mercaptopyridine zinc oxide particle J distillation itself, particularly under the situation that 2-mercaptopyridine zinc oxide particle J content improves, it becomes remarkable.This not only causes antimycotic and antibacterial activity descends, but also becomes a reason that produces foreign flavor because of the product that keeps in the anti-corrosion resin coating 4 from thermal decomposition product self.In addition, if mean particle diameter is bigger, 2-mercaptopyridine zinc oxide particle J drops from fin material (anti-corrosion resin coating 4) 1,1 ' in long-term cooling down operation, and causes fin material 1, and 1 ' antimycotic and antibacterial activity is not lasting.
Regulation 2-mercaptopyridine zinc oxide particle J is that the reason of 0.1 to 100 weight portion is as follows at least a in urethane resin, epoxy resin, mylar and the vinyl chloride resin of 100 weight portions: if this content is lower than 0.1 weight portion, it very little, and fin material 1,1 ' antimycotic and antibacterial activity descends; If though this content surpasses 100 weight portions, the solubility of 2-mercaptopyridine zinc oxide particle J in water is extremely low, the hydrophily of the hydrophilic coating 5 that their influences form on anti-corrosion resin coating 4, and the hydrophily of fin material 1,1 ' descends.In addition, because 2-mercaptopyridine zinc oxide particle J itself is expensive, it is higher that production cost becomes.In addition, the coating of anti-corrosion resin coating 4 formation property also descends.Simultaneously, the preferred content of 2-mercaptopyridine zinc oxide particle J is 0.1 to 50 weight portion; More preferably content is 0.1 to 25 weight portion.According to this content, fin material 1,1 ' hydrophily and antimycotic and antibacterial activity are further enhanced.
The reason that the coating layer thickness of anti-corrosion resin coating 4 is defined as 0.5 to 10 μ m is as follows: if this coating layer thickness is lower than 0.5 μ m, the content that exists of 2-mercaptopyridine zinc oxide particle J in anti-corrosion resin coating 4 diminishes, fin material 1,1 ' antimycotic and antibacterial activity descends; In addition, mean particle diameter is that the 2-mercaptopyridine zinc oxide particle J of 0.01 to 1.0 μ m tends to expose from the surface of anti-corrosion resin coating 4; Thus, in long-term cooling down operation, 2-mercaptopyridine zinc oxide particle J tends to drop with original particle state from anti-corrosion resin coating 4, and causes fin material 1, and 1 ' antimycotic and antibacterial activity is not lasting.If this coating layer thickness surpasses 10 μ m, 2-mercaptopyridine zinc oxide particle J is immersed in the anti-corrosion resin coating 4 so, and particle J is difficult to enrichment in its surface.2-mercaptopyridine zinc oxide particle J enters the discharge capacity decline of hydrophilic coating 5 thus, and the antimycotic and antibacterial activity of fin material 1,1 ' descends.Simultaneously, the preferred coatings thickness of anti-corrosion resin coating 4 is 0.5 to 5 μ m; More preferably thickness is 0.8 to 3 μ m.According to this coating layer thickness, fin material 1,1 ' antimycotic and antibacterial activity is further enhanced.
＜hydrophilic coating 〉
Hydrophilic coating 5 is made of hydrophilic resin, and its coating layer thickness is 0.1 to 10 μ m.In addition, the preferred hydrophilic resin comprises at least a in carboxyl, hydroxyl, sulfonic group, amido link, ehter bond and their salt.Here, the polyacrylic acid that preferably contains carboxyl; The polyvinyl alcohol and the carboxy methyl cellulose that contain hydroxyl; Contain sulfonic acrylic acid sulphur ethyl ester and acrylic acid copolymer; The polyacrylic acid amide that contains amido link; With the polyethylene glycol that contains the ehter bond group.In addition, in order to improve and the contacting and prevent that hydrophily from worsening under the pollutant situation that for example plasticizer and plastics with lubricator adhere to of anti-corrosion resin coating 4, the preferred hydrophilic resin contains carboxyl.Because the formation of hydrophilic coating 5 is given fin material 1,1 ' hydrophily.
The coating layer thickness of regulation hydrophilic coating 5 is that the reason of 0.1 to 10 μ m is as follows: if coating layer thickness is lower than 0.1 μ m, and fin material 1,1 ' hydrophily descends; If thickness surpasses 10 μ m, hydrophilic further improvement does not get the nod, and the 2-mercaptopyridine zinc oxide particle J that causes being included in the anti-corrosion resin coating 4 does not discharge by hydrophilic coating 5.Simultaneously, the preferred coatings thickness of hydrophilic coating 5 is 0.1 to 5 μ m; More preferably thickness is 0.1 to 1 μ m.According to this coating layer thickness, fin material 1,1 ' hydrophily and antimycotic and antibacterial activity are further enhanced.
＜water-soluble coating 〉
Water-soluble coating 8 is made of the water-soluble resin that contains hydroxyl at its molecule, and its coating layer thickness is 0.1 to 10 μ m.In addition, do not limit water-soluble resin especially, as long as it contains hydroxyl at its molecule; For example, can enumerate as sodium carboxymethylcellulose, polyvinyl alcohol and polyethylene glycol.In addition, water-soluble coating of the present invention is meant such coating, and it is not less than 95 quality % dissolving in back 24 hours in impregnated in running water.Therefore, even water-soluble resin contains hydroxyl at its molecule, also preferably it contains such functional group, for example, by forming this coating in the coating 8 and curing, in the water-soluble coating of describing after a while 8, form any in the isocyanate groups of bridge construction and the epoxy radicals.This is that the solubility of water-soluble coating 8 is owing to bridge construction descends because if water-soluble resin contains described functional group.In addition, in water-soluble resin, can use above-mentioned resin maybe can mix separately with surpassing a kind of resin.
The coating layer thickness of preferred water-soluble coating 8 is 0.1 to 10 μ m.If coating layer thickness is lower than 0.1 μ m, the solubility of the water-soluble coating 8 in cooling down operation (condensation) descends in the fin of making by this pressure processing, be difficult to rinse out processing oil attached to fin surface, fin material 1 ' is attached to metal die in pressure processing, and machinability is tended to descend; If thickness surpasses 10 μ m, the coating easiness of fin material 1 ' is in coating and cure middle decline.
Then fin material 1 will be described, 1 ' preparation method.Prepare fin material 1 according to following method, 1 ':
(1) phosphate-chromate is handled or phosphate-zirconium is handled by carrying out on the one or both sides (not shown) of the base material 2 that is made of aluminum or aluminum alloy, forms the erosion shield 3 that is made of inorganic oxide or organic and inorganic oxide.Here, be coated with conversion processing liquid on the base material 2, carry out this phosphate-chromate processing or phosphate-zirconium and handle by this being injected in.Preferred its coating weight counts 1 to 100mg/m by being converted into Cr or Zr
2The coating layer thickness that is preferably formed is 10 to 1,000 .In addition, before forming erosion shield 3, preferably on the surface of base material 2, carry out this injection alkaline aqueous solution, and with its prior degreasing.By degreasing, improved the contact between base material 2 and the erosion shield 3.
(2) coating and cure at least a resin solution in urethane resin, epoxy resin, mylar and the vinyl chloride resin on the erosion shield 3 that forms forms anti-corrosion resin coating 4 thus on erosion shield 3.Here, for example rod is coated with machine and roll coater is coated with according to conventionally known coating process, and suitably coating weight is set, so that the thickness of anti-corrosion resin coating 4 becomes 0.5 to 10 μ m.Though according to the resin solution that is coated with stoving temperature is set suitably, cures under the Undec temperature of 2-mercaptopyridine zinc oxide particle J therein.In addition, before forming anti-corrosion resin coating 4, preferably on the surface of erosion shield 3, carry out this injection alkaline aqueous solution, and to its prior degreasing.By degreasing, improved the contact between erosion shield 3 and the erosion shield 4.
(3) coating and cure the resin solution of hydrophilic resin on the surface of formed anti-corrosion resin coating 4 forms hydrophilic coating 5, and makes fin material 1 on coating 4.Here, for example rod is coated with machine and roll coater is coated with according to conventionally known coating process, and suitably coating weight is set, so that the thickness of hydrophilic coating 5 becomes 0.1 to 10 μ m.By cure hydrophilic coating 5 under than the high temperature of the baking temperature of anti-corrosion resin coating 4, the concentration that 2-mercaptopyridine zinc oxide particle J enters anti-corrosion resin coating 4 surfaces is improved.Simultaneously, by discharging here, give fin material 1 antimycotic and antibacterial activity at the 2-mercaptopyridine zinc oxide particle J of the face side enrichment of hydrophilic coating 5.In addition, though require stoving temperature suitably to be set, under the Undec temperature of 2-mercaptopyridine zinc oxide particle J, cure according to (hydrophily) resin solution that is coated with.
In addition, under the situation of fin material 1 ' with water-soluble coating 8, (4) below after forming hydrophilic coating 5, carrying out:
(4) on the surface of the hydrophilic coating 5 that forms, be coated with and cure the resin solution of water-soluble resin, and on coating 5, form water-soluble coating 8.Here, be coated with according to the known coating process of routine such as wire bar applicator and roll coater method, and aptly coating weight be set, make that the thickness of water-soluble coating 8 is 0.1 to 10 μ m.In addition, preferably under alap temperature, cure water-soluble coating 8.This is because if stoving temperature is higher, and condensation reaction takes place for water-soluble coating 8 (water-soluble resin) and hydrophilic coating 5 (hydrophilic resin), and coating 8 is become be difficult to dissolve in cooling down operation (condensation).Therefore, preferred stoving temperature is no more than 200 degrees centigrade.
[embodiment]
Implement best mode of the present invention although described thus, will describe the embodiment that effect of the present invention has been subjected to an examination here.
In order to check the effect of embodiment 1 to 5, the fin material 1,1 ' shown in preparation Figure 1A and the 1B.In addition, as base material 2, use separately be constitute by the aluminium alloy No.1200 that stipulates among the JIS H4000, sheet thickness is the aluminum sheet of 0.1mm.
On the surface of aluminum sheet, the phosphate-chromate that is used to form erosion shield 3 is handled.As conversion processing liquid, use be by NIPPON PAINT Co., Alsurf (registration mark) 401/45, phosphoric acid and chromic acid that Ltd. makes.At this moment, making the coating layer thickness of erosion shield 3 is that (the Cr conversion values of being measured by the fluorescent X-ray method is 20mg/m to 400
2).
Then, use urethane resin paint (by TOHO Chemical Industry Co., LTD. urethane-modified resin emulsion Hightech (registration mark) S-6254 of Zhi Zaoing) as the paint that is used for erosion shield, and on erosion shield 3, the urethane resin paint of coating scheduled volume, the 2-mercaptopyridine zinc oxide (mean particle diameter 0.37 μ m) that wherein contains weight portion shown in the table 1, cure then, make the temperature of aluminum sheet reach 160 degrees centigrade.Simultaneously, make water as dispersing liquid, and use spiral to disperse to measure the mean particle diameter of 2-mercaptopyridine zinc oxide by laser diffraction/scattering particle size distribution analysis instrument (SEISHIN ENTERPRISE Co., Ltd.SK LASERMICRON SIZER LMS) as process for dispersing.Therefore, form every kind of anti-corrosion resin coating 4 of coating layer thickness shown in the table 1.
Then, on anti-corrosion resin coating 4, the resin aqueous solution of coating scheduled volume, wherein with polyacrylic acid (molecular weight 100,000) as the resin that contains carboxyl, polyethylene glycol (molecular weight 6,000) contains mixed with resin (polyacrylic acid, the 30 quality % of hydroxyl as resin that contains ehter bond and polyvinyl alcohol (saponification degree 98%) conduct; Polyethylene glycol, 30 quality %; Polyvinyl alcohol, 40 quality %), cure then, make the temperature of aluminum sheet reach 240 degrees centigrade.Therefore, formed every kind of hydrophilic coating 5 of the coating layer thickness shown in the table 1.
In addition, for embodiment 4 and 5, on hydrophilic coating 5 separately, the resin aqueous solution of coating scheduled volume, its sodium carboxymethylcellulose (molecular weight 100,000) mixes by 50 quality % respectively as resin that contains hydroxyl and polyethylene glycol (molecular weight 6,000), cure then, make the temperature of each aluminum sheet reach 150 degrees centigrade.Therefore, formed every kind of water-soluble coating 8 of the coating layer thickness shown in the table 1.Simultaneously, water-soluble coating 8 back 24 hours solubility in impregnated in running water is not less than 99 quality %.
Simultaneously, as with the contrast of embodiment 1 to 5, also make the fin material of comparative example 1 to 6.Those fin materials that are similar to embodiment 1 to 5 prepare the fin material of comparative example 1 to 4, difference is, makes the coating layer thickness of the anti-corrosion resin coating 4 of comparative example 1 and 2, comparative example 3 and comparative example 4, the content (weight portion) of 2-mercaptopyridine zinc oxide and the discontented unabridged version of coating layer thickness of hydrophilic coating 5 invent desired scope respectively.In addition, in comparative example 5, make its fin material be similar to those fin materials of embodiment 1 to 5, difference is, contains the 2-mercaptopyridine zinc oxide not in anti-corrosion resin coating 4 in hydrophilic coating 5.In addition, in comparative example 6, make its fin material be similar to those fin materials of embodiment 1 to 5, difference is, uses the 2-mercaptopyridine zinc oxide of the mean particle diameter (4 μ m) that surpasses 1 μ m.
Then, the fin material of embodiment 1 to 5 and the fin material of comparative example 1 to 6 impregnated in mobile running water (1000cc/min) 240 hours, promptly after Jia Ding the long-term cooling down operation, assess hydrophily and antimycotic and antibacterial activity according to the method shown in following.It the results are shown in the table 1.In addition, for the fin material before impregnated in mobile running water, the existence of checking processability and initial smell according to the method shown in following whether; It the results are shown in the table 1.
＜hydrophily 〉
The pure water of 1 μ l is dripped on each fin material behind the dipping, and measure contact angle θ,, think that it is good if contact angle is no more than 30 ° by angulometer (by Kyowa Interface Science Co., the CA-X250 type that LTD. makes).
＜antimycotic and antibacterial activity 〉
According to the antimycotic and antibacterial activity of in " A Rapid and Simple Assay Antifungal Properties of SolidMaterials by Using a Glass Ring Culture; Sadako YAMADA etc.; Bokin Bobai; Vol.31; No.11, the 711st to 717 page (2003) ", describing of glass ring method assessment.Simultaneously, as employed fungi, with three kinds of fungies: aspergillus niger (Aspegillusniger), produce malicious mould (Penicillium chrysogenum) and Cladosporium cladosporioides mixes.According to six kinds of level evaluation activity shown in the table 2.
＜processability 〉
By using no stretching die (drawless mold) (by HIDAKA ENGINEERING CO., LTD. makes) to suppress test, check the press forming speed that forming defects takes place in operation.Press forming speed is high more, and (spm: the stroke of per minute), processability is good more; Usually about 200spm is enough.
＜initial smell 〉
By panel of expert, based on whether can judge, thereby the existence of checking smell whether from the sensory evaluation that the fin material of each preparation is awared smell by the olfactory test of Japan Association on Odor Environment regulation.
Table 1
| The anti-corrosion resin coating | Hydrophilic coating thickness (μ m) | Water-soluble coating thickness (μ m) | Assessment result | |||||||
| Coating layer thickness (μ m) | Urethane resin (weight portion) | The 2-mercaptopyridine zinc oxide | Hydrophily | Processability (spm) | Initial smell | Antimycotic and antibacterial activity | ||||
| (weight portion) | Mean particle diameter (μ m) | |||||||||
| Embodiment 1 | 0.2 | 100 | 90 | 0.37 | 0.5 | 0 | Well | 200 | Do not have | 6 |
| Embodiment 2 | 9.8 | 100 | 0.1 | 0.37 | 0.5 | 0 | Well | 200 | Do not have | 6 |
| Embodiment 3 | 1.0 | 100 | 90 | 0.37 | 0.5 | 0 | Well | 200 | Do not have | 6 |
| Embodiment 4 | 1.0 | 100 | 90 | 0.37 | 0.5 | 1 | Well | 300 | Do not have | 6 |
| Embodiment 5 | 1.0 | 100 | 90 | 0.37 | 0.5 | 0.05 | Well | 200 | Do not have | 6 |
| Comparative example 1 | 0.05 | 100 | 90 | 0.37 | 0.5 | 0 | Well | 200 | Do not have | 3 |
| Comparative example 2 | 15 | 100 | 75 | 0.37 | 0.5 | 0 | Well | 200 | Do not have | 4 |
| Comparative example 3 | 1.0 | 100 | 0.05 | 0.37 | 0.5 | 0 | Well | 200 | Do not have | 2 |
| Comparative example 4 | 1.0 | 100 | 25 | 0.37 | 0.05 | 0 | Difference | 200 | Do not have | 6 |
| Comparative example 5 | 1.0 | 100 | (*) 25 | 0.37 | 0.5 | 0 | Difference | 200 | Do not have | 2 |
| Comparative example 6 | 1.0 | 100 | 90 | 4.0 | 0.5 | 0 | Difference | 200 | Have | 4 |
Remarks: the underscore unabridged version with thumb down in (1) table 1 is invented desired scope.
(2) mark of comparative example 5 (
*) represent that the 2-mercaptopyridine zinc oxide is included in the hydrophilic coating.
Table 2
| The assessment of antimycotic and antibacterial activity | The g and D state |
| 1 | Almost producing spore on the whole surface. |
| 2 | Between 1 and 3. |
| 3 | Slightly see the appearance of spore. |
| 4 | Although do not produce spore, at the whole g and D that arrives hypha,hyphae outwardly almost. |
| 5 | Although do not produce spore, slightly see the g and D of hypha,hyphae. |
| 6 | Do not see the g and D of hypha,hyphae. |
According to the result of table 1, because the fin material 1,1 ' of embodiment 1 to 5 satisfies desired scope, they all are excellent in hydrophily, antimycotic and antibacterial activity, processability and initial smell aspect all.In addition, because the fin material 1 ' of embodiment 4 has formed the water-soluble coating 8 of the coating layer thickness that satisfies preset range on hydrophilic coating 5, so press forming speed is improved, and fin material 1 ' has more excellent processability.Simultaneously, although because the fin material 1 ' of embodiment 5 has formed water-soluble coating 8, its coating layer thickness is lower than predetermined scope, does not see the improvement of press forming speed.
On the other hand, in the fin material of comparative example 1 and 2, because anti-corrosion resin coating 4 coating layer thickness separately is although they have good hydrophilicity, processability and initial smell, antimycotic poor with antibacterial activity outside desired scope.In the fin material of comparative example 3, because the content of 2-mercaptopyridine zinc oxide is lower than the lower limit of institute's claimed range, although the hydrophily of fin material, processability and initial smell are good, it is antimycotic and antibacterial activity is poor.In the fin material of comparative example 4, because the coating layer thickness of hydrophilic coating 5 is lower than the lower limit of institute's claimed range, although the processability of fin material, antimycotic and antibacterial activity and initial smell are good, its hydrophily is poor.In the fin material of comparative example 5, owing to the 2-mercaptopyridine zinc oxide is comprised in the hydrophilic coating 5, although the processability of fin material and initial smell are good, its hydrophily and antimycotic all poor with antibacterial activity.In the fin material of comparative example 6, because the particle diameter of 2-mercaptopyridine zinc oxide surpasses 1 μ m, except processability, the hydrophily of fin material, antimycotic and antibacterial activity and initial smell are all poor.
Claims (3)
1. aluminium fin material, it comprises:
The base material that constitutes by aluminum or aluminum alloy;
The erosion shield that constitutes by inorganic oxide or organic and inorganic complex that on base material, forms;
The coating layer thickness that forms on erosion shield is the anti-corrosion resin coating of 0.5 to 10 μ m; With
The coating layer thickness that forms on the anti-corrosion resin coating is the hydrophilic coating that is made of hydrophilic resin of 0.1 to 10 μ m,
Wherein said anti-corrosion resin coating is by at least a resin that constitutes in urethane resin, epoxy resin, mylar and the vinyl chloride resin, and for the resin of the described formation of 100 weight portions, the mean particle diameter that comprises 0.1 to 100 weight portion is the 2-mercaptopyridine zinc oxide of 0.01 to 1.0 μ m.
2. aluminium fin material according to claim 1, wherein said hydrophilic coating comprise at least a in carboxyl, hydroxyl, sulfonic group, amido link, ehter bond and their salt.
3. aluminium fin material according to claim 1 and 2, it also is included in the coating layer thickness that forms on the hydrophilic coating is the water-soluble coating of 0.1 to 10 μ m, wherein said water-soluble coating is made of the water-soluble resin that contains hydroxyl at its molecule.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005187425 | 2005-06-27 | ||
| JP2005187425 | 2005-06-27 | ||
| JP2005305388 | 2005-10-20 |
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| CN100406836C CN100406836C (en) | 2008-07-30 |
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| EP2119996A1 (en) * | 2007-02-16 | 2009-11-18 | Kabushiki Kaisha Kobe Seiko Sho | Aluminum fin material for heat exchanger |
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| JP3258244B2 (en) * | 1996-11-21 | 2002-02-18 | 株式会社神戸製鋼所 | Fin material for heat exchanger with excellent hydrophilicity |
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| EP2119996A1 (en) * | 2007-02-16 | 2009-11-18 | Kabushiki Kaisha Kobe Seiko Sho | Aluminum fin material for heat exchanger |
| EP2119996A4 (en) * | 2007-02-16 | 2012-06-06 | Kobe Steel Ltd | Aluminum fin material for heat exchanger |
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