CN106011977A - Method for forming punctate pattern on surface of metal - Google Patents
Method for forming punctate pattern on surface of metal Download PDFInfo
- Publication number
- CN106011977A CN106011977A CN201610505877.5A CN201610505877A CN106011977A CN 106011977 A CN106011977 A CN 106011977A CN 201610505877 A CN201610505877 A CN 201610505877A CN 106011977 A CN106011977 A CN 106011977A
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- Prior art keywords
- metal surface
- pur
- powder
- dot pattern
- enamelled coating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J129/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
- C09J129/02—Homopolymers or copolymers of unsaturated alcohols
- C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/04—Electrophoretic coating characterised by the process with organic material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a method for forming a punctate decorative pattern on the surface of metal. The method includes the steps that shielding powder is prepared through hot melt adhesive, the shielding powder adheres to the surface of a metal product, a first paint layer is formed in a region unshielded by the shielding powder in a one-time electrophoresis manner, and after the shielding powder is removed, a second paint layer of which the color is different from that of the first paint layer is deposited in the region covered with the shielding powder in a secondary electrophoresis manner, so that the punctate structure of the shielding powder is transferred to the surface of the metal. The hot melt adhesive shielding powder can be dissolved with an organic solvent in a swelling manner to be cleaned and removed or dissolved with hot water to be cleaned and removed or removed through other simple methods without using a strong base or other corrosive substances, and the influence on the paint film structure is avoided; and meanwhile, various punctate patterns can be formed according to the requirements, the manufacturing process is simple, and the application range is broadened.
Description
Technical field
The present invention relates to a kind of metal surface treating method, particularly relate to a kind of method that metal surface forms dot pattern.
Background technology
Metallochrome or solid-shade paint surface that metallic article is dull cannot meet people's demand diversified to product appearance, because of
And while surface of metal product is protected, form colorful decorative pattern outward appearance to manufacture decorative product and miscellaneous part
Product or the product of novel and beautiful that style is unified are gradually paid attention to, and its processing technology is the most growing.
Existing patterned appearance manufacture method includes surface spraying coating, thermally transferred pattern, printing etc., the ink of these modes
Layer is separate with priming paint, exists only in product surface and does not penetrates through priming paint, easily loses pattern, especially because of abrasion, corrosion etc.
It is in more harsh use environment, the floor drain of such as sanitaryware, door handle, tap etc. be chronically at humidity, perishable,
In the environment often scrubbed, its outward appearance life-span is more difficult to long sustaining, and the shelf-life is short, this strong influence its use.
In view of this, electrophoresis process is gradually paid attention to.Electrophoresis process is with metal object surface as electrode, relies on the work of electric field
With making the coating coating process at metal surface formation of deposits paint film, adhesive force is strong, compact in paint film, is susceptible to abrasion, outward appearance longevity
Life is long.The double-colored electrophoresis process of existing formation pattern, is all to form shielding layer by coating printing ink, clear after carrying out an electrophoresis
Wash ink off, then carry out secondary electrophoresis.Ink clean time must use highly basic or other corrosive substances as abluent, can be right
One time electrocoating film layer damages, thus relatively big to its performance and appearance effects, and easily causes environmental pollution.
Additionally, the mode that existing ink often uses silk screen printing is coated, can be only applied on planar products, it is impossible to
Being applied to curved surface or other labyrinths, it is also difficult to make the speckle patterns that similar nature is random, the speckle patterns border of formation is raw
Firmly, it is impossible to reach multiple decorative effect, and silk-screen processing procedure is numerous and diverse, half tone restricted lifetime, cost is high, switching difficulty, limits
Its application.
Summary of the invention
The invention provides a kind of metal surface formed dot pattern method, which overcome the deficiency existing for prior art it
Place.
The technical solution adopted for the present invention to solve the technical problems is: a kind of metal surface forms the method for dot pattern, bag
Include following steps:
1) powder is covered in making, and this covers powder is the dots structure formed by PUR, and fineness scope is 50-1500 μ
M, wherein the softening point of PUR is 80-180 DEG C；
2) will cover the surface that powder is disperseed and adhered to metallic article by heating, the temperature of heating is not less than PUR
Softening point, the time is 2-5 minute；
3) this metal surface is carried out an electrophoretic process, by area deposition the first enamelled coating that electrophoresis is exposed in metal surface
And the first enamelled coating is solidified；
4) this is covered powder immerse in organic solvent swelling melting and remove from metal surface；Powder is covered by heat described in or
Water soluble type PUR is made, and immerses 10min～60min in the water of 60 DEG C～95 DEG C make it dissolve and from metal watch by covering powder
Face is removed；
5) this metal surface is carried out secondary electrophoretic process, cover powder overlay area deposition and the first paint by electrophoresis former
Second enamelled coating is also solidified by layer different the second enamelled coating of color, is formed and covers the corresponding dot pattern of mealy structure with this.
Preferably, step 1) in, described in cover the manufacturing process of powder and comprise the following steps:
1) material forming PUR is cooled into PUR blob of viscose by proportioning mix and blend, melt blending after extruding；
2) by PUR blob of viscose by low-temperature grinding formed described fineness to cover powder standby.
Preferably, described in cover powder and be scattered in the metal surface of preheating by Electrostatic Absorption or spread, preheating temperature is
60-180℃。
Preferably, described PUR is polyethylene kind PUR, polypropylene hot melt adhesive, ethene-vinyl acetate copolymer hot melt
In glue, polyesters PUR, polyamide-based PUR, polyurethanes PUR, styrene and block copolymer hot melt adhesive thereof
One or a combination thereof.
Preferably, described organic solvent is acetone, Ketohexamethylene, acetic acid, ethyl acetate, butanone, oxolane, dichloromethane
Alkane, trichloroethane, ethyl propionate, butyl acetate, hexamethylene, N,N-dimethylacetamide, isopropanol, the one of butanol
Or a combination thereof.
Preferably, described hot water dissolving's type PUR is increased by 20%～65% polyvinyl alcohol, 20%～50% matrix resin, 3～25%
Viscosity resin, plasticizer 10～50%, 0～10% filler and 2%～5% function additive composition, wherein
Matrix resin is ethylene-vinyl acetate copolymer, thermoplastic polyurethane, ethylene-vinyl alcohol copolymer, ethylene-propylene
One in acetoacetic ester high polymer, polyethyl acrylate, polyamide, polyester or a combination thereof,
Tackifier is Colophonium, modified rosin, liquid rosin, C5 Petropols, C9 Petropols, C5/C9 copolymerization tree
Fat, hydrogenation methanoindene resin, hydrogenation C9 resin, terpene resin, rosin ester, hydrogenated wood rosin glycerol ester, cumarone resin, terpenes tree
A kind of or a combination thereof in fat,
Filler is the one in barium sulfate, Pulvis Talci, cenosphere, titanium dioxide, white carbon, Kaolin, mica powder
Or a combination thereof,
Plasticizer be glycerol, ethylene glycol, diethylene glycol, 2,2'-ethylenedioxybis(ethanol)., tetraethylene glycol (TEG), propylene glycol, glycerol, caprolactam,
One in acetamide, Polyethylene Glycol, trihydroxy methyl propane, phthalic acid ester or a combination thereof,
Function additive is a kind of in lubricant, antioxidant, viscosity modifier or a combination thereof.
Preferably, by adding appropriate dimethyl sulfoxide or glycerol, stirring hot water or vibration of ultrasonic wave hot water in described hot water
Accelerate the cleaning process of described hot water dissolving's type PUR shielding film.
Preferably, step 3) and step 5) in, the solid content of this electrophoresis is 5-15%, and pH value is 4-5, and voltage is 45-55V,
Time is 20-50s.
Preferably, the thickness of described first enamelled coating and the second enamelled coating is 5～30 μm.
Preferably, step 3) or step 5) in, described solidification is baking and curing, solidifies 20-40 at 120 DEG C-180 DEG C
Minute.
Preferably, described solidification is ultra-violet curing, in 1500-2500mJ/cm after drying 2-10 minute at 60 DEG C-90 DEG C2
Solidify under ultraviolet light.
Compared to prior art, the method have the advantages that
1. using PUR making to cover powder and adhere to metal surface, one time electrophoresis forms the first enamelled coating in non-shaded areas,
Remove and make to cover powder overlay area deposition and the second enamelled coating of the first enamelled coating different colours by secondary electrophoresis again after covering powder,
Thus the dots structure covering powder is transferred to metal surface.PUR covers powder can be clear by the swelling dissolving of organic solvent
Wash away except and the simple method such as hot water dissolving's removing remove, it is not necessary to use highly basic or other corrosive substances, paint film will not be tied
It is configured to impact, simplifies processing procedure simultaneously.
2. PUR powder can by Electrostatic Absorption or directly the mode such as spread be scattered in metal surface, can be formed in a jumble with
The effect of machine, and do not affected by metal surface shape, can be applicable to the metallic article of arbitrary surface, applied range；And powder
End can form the edge with corner angle after being pulverized, thus forms the most pseudo-classic outward appearance, plays pseudo-classic decorative effect.
3. dot pattern wearability, acid resistance salt air corrosion performance and the decocting in water good test effect formed, is suitable to be applied to humidity
Perishable, often to scrub etc. in harsh environment, the outward appearance life-span is long.
4. use hot water dissolving's type PUR make cover powder can dissolve in the hot water cleaning remove, further simplify system
Journey and reduce manufacturing conditions, is suitable to actual production and uses.
Below in conjunction with drawings and Examples, the present invention is described in further detail；But a kind of metal surface of the present invention forms point
The method of shape pattern is not limited to embodiment.
Accompanying drawing explanation
Fig. 1 is the dot pattern schematic diagram that one embodiment of the invention is formed；
Fig. 2 is the dot pattern schematic diagram that another embodiment of the present invention is formed；
Fig. 3 is the dot pattern schematic diagram that further embodiment of this invention is formed.
Detailed description of the invention
A kind of metal surface forms the method for dot pattern, is to be made by PUR to cover powder, will cover powder and adhere to gold
Metal surface, then make to cover powder overlay area and the electrophoretic paint of uncovering area area deposition different colours by secondary electrophoresis, thus shape
Become predetermined dot pattern.
Covering powder is the dots structure formed by PUR, and its fineness scope is 50-1500 μm, the softening point model of PUR
Enclose for 80-180 DEG C.In one embodiment, during making, the material forming PUR is pressed proportioning mix and blend, after melt blending
By extruding pelletization or be poured into the modes such as mould and form larger-size PUR blob of viscose and cool down, then pass through deep cooling crush
Machine, using liquid nitrogen as coolant, pulverizes at low temperatures, and smashing fineness can control between 50-1500 μm.During use, permissible
The powder of different-grain diameter grade is carried out mix and match to reach different effect.
PUR can be such as polyethylene kind PUR, polypropylene hot melt adhesive, ethene-vinyl acetate copolymer PUR,
In polyesters PUR, polyamide-based PUR, polyurethanes PUR, styrene and block copolymer hot melt adhesive thereof one
Plant or a combination thereof, the preferential PUR selecting matrix resin to be middle low-molecular-weight.
In one embodiment, by 20%～65% polyvinyl alcohol, 20%～50% matrix resin, 3～25% tackifying resin, plasticizer
10～50%, 0～10% filler and 2%～5% function additive composition, wherein
Matrix resin is ethylene-vinyl acetate copolymer, thermoplastic polyurethane, ethylene-vinyl alcohol copolymer, ethylene-propylene
One in acetoacetic ester high polymer, polyethyl acrylate, polyamide, polyester or a combination thereof, preferably thermoplastic polyurethane,
Polyamide, the resin model that the polarity preferred polar group content of matrix resin is higher, the molecular weight of matrix resin preferably in decile
The resin of son amount or the resin system of middle low-molecular-weight collocation.
Tackifier is Colophonium, modified rosin, liquid rosin, C5 Petropols, C9 Petropols, C5/C9 copolymerization tree
Fat, hydrogenation methanoindene resin, hydrogenation C9 resin, terpene resin, rosin ester, hydrogenated wood rosin glycerol ester, cumarone resin, terpenes tree
A kind of or a combination thereof in fat,
Filler is the one in barium sulfate, Pulvis Talci, cenosphere, titanium dioxide, white carbon, Kaolin, mica powder
Or a combination thereof,
Plasticizer be glycerol, ethylene glycol, diethylene glycol, 2,2'-ethylenedioxybis(ethanol)., tetraethylene glycol (TEG), propylene glycol, glycerol, caprolactam,
One in acetamide, Polyethylene Glycol, trihydroxy methyl propane, phthalic acid ester or a combination thereof, preferably glycerol,
Caprolactam, acetamide, Polyethylene Glycol, trihydroxy methyl propane, more preferably glycerol/caprolactam, glycerol/poly-second two
Alcohol, glycerol/acetamide, glycerol/trihydroxy methyl propane.
Function additive is a kind of in lubricant, antioxidant, viscosity modifier or a combination thereof.
This PUR is hot water dissolving's type PUR, and molecular components and structure by regulation polyvinyl alcohol can regulate it and dissolve
Temperature and dissolution velocity, can control to dissolve in the hot water of 60 DEG C～95 DEG C, preferably 80 DEG C-95 DEG C.
That makes covers the surface that powder is disperseed and adhered to metallic article by heating, and heating can be baking oven for heating or infrared add
Heat, the temperature of heating is 80 DEG C-180 DEG C, and the time is 2-5 minute.Metal surface can preheat, and preheating temperature is 80 DEG C
-180℃.In one embodiment, the surface of metallic article is plane, and PUR covers the direct spread of powder makes it be dispersed randomly in
In plane；In another embodiment, the surface of metallic article is curved surface, and PUR covers powder by electrostatic spray coating adsorption in song
On face.PUR heating reaches softening point and has certain viscosity, thus adheres to surface of metal product, fixing after cooling.Excellent
Choosing, can in advance surface of metal product be polished, the pretreatment such as copper facing, nickel plating or a combination thereof is so that follow-up electrophoresis.
As an example, with reference to Fig. 1, spread after the mixing of various sizes of PUR powder, the mixed and disorderly circle speckle effect that nature is random is formed.
With reference to Fig. 2, by controlling spread density and the heating-up temperature of PUR powder, PUR powder melts and neighbouring powder phase can be made
Connect, thus form the effect of strip speckle.With reference to the structure for amplifying schematic diagram of Fig. 3 PUR powder, pulverize by controlling powder
Condition, can form the edge with corner angle, thus produce and be similar to the outward appearance that meteorite hit earth surface is formed, there is spy
Different decorative effect.
Then, metal surface is carried out an electrophoretic process, by the ability cathode electrophoresis region exposed in metal surface (the most not by
Cover the region that powder covers) formed thickness be the first enamelled coating of 5-30 μm and the first enamelled coating solidified.Consolidating of electrophoresis
Content is 5-15%, and pH value is 4-5, and voltage is 45-55V, and the time is 20-50s.Owing to electrophoresis is originally as the moon with metal
Pole deposits, and nonconducting PUR covers the region of powder covering and do not deposits, it is achieved thereby that region-type plating paint.To first
The solidification of enamelled coating can be ultra-violet curing, in 1500-2500mJ/cm after drying 2-10 minute at 60 DEG C-90 DEG C2Under ultraviolet light
Solidify.Additionally, when using the PUR that softening temperature is higher to cover powder, solidification can also use baking and curing, in
Solidify 20-40 minute at 120 DEG C-180 DEG C.Additionally, can also be realized by anodic electrophoresis, not in this to go forth.
After electrophoresis, powder will be covered and remove from metal surface and clean metal surface.In one embodiment, by metal watch
Face is immersed in organic solvent until the swelling melting of powder will be covered, and removes this by wiping and covers powder.
Organic solvent be acetone, Ketohexamethylene, acetic acid, ethyl acetate, butanone, oxolane, dichloromethane, trichloroethane,
Ethyl propionate, butyl acetate, hexamethylene, N,N-dimethylacetamide, isopropanol, butanol etc., by the similar principle that mixes
Carry out swelling dissolving to remove.Owing to PUR is thermoplastic, and electrophoretic paint is typically thermosets, does not the most occur molten
Swollen, thus on electrophoretic paint without impact.In another embodiment, covering powder is hot water dissolving's type PUR, will cover powder and soak
Making it dissolve and clean removing in hot water, the temperature of this hot water is 40 DEG C～95 DEG C, and soak time is 10min～60min, also
The organic solvents such as appropriate dimethyl sulfoxide, glycerol can be added in water and accelerate cleaning process by stirring or ultrasound wave.On
The method of stating can be removed rapidly PUR and cover powder, and cleaning process is simple, non-corrosiveness material, makees front road electrophoretic paint without destroying
With, it is ensured that the performance of electrophoretic paint.Wherein, in water soluble type PUR, polyvinyl alcohol is Biodegradable polymer material,
Under antibacterial and enzyme effect, 46 days degradables 75%, to environment non-hazardous.
Then, metal surface is carried out secondary electrophoretic process, (now should in former powder overlay area of covering by ability cathode electrophoresis
Subregion metal covering is exposed) form second enamelled coating different with the first enamelled coating color and the second enamelled coating is solidified, wherein should
The thickness of the second enamelled coating is 5-30 μm, and the solid content of this secondary electrophoresis is 5-15%, and pH value is 4-5, and voltage is 35-45V,
Time is 20-50s, solidifies similar with the solidification of the first enamelled coating.First enamelled coating and the second enamelled coating color are different, for example,
First enamelled coating is black modelled after an antique, and the second enamelled coating is bronze；Or, the first enamelled coating is brown, and the second enamelled coating is light yellow,
Thus define dot pattern corresponding with covering mealy structure.
Testing the goods of the inventive method gained, its result is as shown in table 1:
| Test event | Test condition | Test result | Traditional standard |
| (A) acid salt spray test | >500H | Outward appearance 10 grades | 64H |
| (C) knockout impact | >30L | Coating is without worn out | 12L |
| (E) water logging 65 DEG C | 180H | Outward appearance 10 grades | 38℃*100H |
| (D) adhesion (hundred cut) | / | 5A | |
| (B) thermal shock circulation | 10 circulations | Outward appearance 10 grades | 4 circulations |
| (F) pencil hardness (Rhizoma Sparganii) | / | 3H | 2H |
The wearability on dot pattern surface, acid resistance corrosive salt spray and the decocting in water test etc. that are formed are functional, have persistently
The outward appearance life-span, i.e. there is dicoration, can apply to again in the most harsh environment, such as kitchen guardings etc. are moist perishable, often brush
The environment washed.
Above-described embodiment is only for further illustrating the method that a kind of metal surface of the present invention forms dot pattern, but the present invention
Being not limited to embodiment, any simple modification, equivalent that above example is made by the technical spirit of every foundation present invention become
Change and modify, each falling within the protection domain of technical solution of the present invention.
Claims (11)
1. the method that a metal surface forms dot pattern, it is characterised in that comprise the following steps:
1) powder is covered in making, and this covers powder is the dots structure formed by PUR, and fineness scope is
50-1500 μm, wherein the softening point of PUR is 80-180 DEG C；
2) will cover the surface that powder is disperseed and adhered to metallic article by heating, the temperature of heating is not less than heat
The softening point of melten gel, the time is 2-5 minute；
3) this metal surface is carried out an electrophoretic process, by the area deposition that electrophoresis is exposed in metal surface
First enamelled coating is also solidified by one enamelled coating；
4) this is covered powder immerse in organic solvent swelling dissolving and remove from metal surface；Powder is covered described in or
End is made up of hot water dissolving's type PUR, immerses 10min～60min in the water of 60 DEG C～95 DEG C make it molten by covering powder
Solve and remove from metal surface；
5) this metal surface is carried out secondary electrophoretic process, by electrophoresis former cover powder overlay area deposition with
Second enamelled coating is also solidified by the second enamelled coating that the first enamelled coating color is different, forms that to cover mealy structure with this corresponding
Dot pattern.
Metal surface the most according to claim 1 forms the method for dot pattern, it is characterised in that: step 1)
In, described in cover the manufacturing process of powder and comprise the following steps:
1) material forming PUR is cooled into PUR glue by proportioning mix and blend, melt blending after extruding
Block；
2) by PUR blob of viscose by low-temperature grinding formed described fineness to cover powder standby.
Metal surface the most according to claim 1 forms the method for dot pattern, it is characterised in that: described screening
Covering powder and be scattered in the metal surface of preheating by Electrostatic Absorption or spread, preheating temperature is 60-180 DEG C.
Metal surface the most according to claim 1 forms the method for dot pattern, it is characterised in that: described heat
Melten gel is polyethylene kind PUR, polypropylene hot melt adhesive, ethene-vinyl acetate copolymer PUR, polyesters heat
One in melten gel, polyamide-based PUR, polyurethanes PUR, styrene and block copolymer hot melt adhesive thereof
Or a combination thereof.
Metal surface the most according to claim 1 forms the method for dot pattern, it is characterised in that have described in:
Machine solvent be acetone, Ketohexamethylene, acetic acid, ethyl acetate, butanone, oxolane, dichloromethane, trichloroethane,
Ethyl propionate, butyl acetate, hexamethylene, N,N-dimethylacetamide, isopropanol, the one of butanol or a combination thereof.
Metal surface the most according to claim 1 and 2 forms the method for dot pattern, it is characterised in that: institute
State hot water dissolving's type PUR by 20%～65% polyvinyl alcohol, 20%～50% matrix resin, 3～25% tackifying resin,
Plasticizer 10～50%, 0～10% filler and 2%～5% function additive form, wherein
Matrix resin is ethylene-vinyl acetate copolymer, thermoplastic polyurethane, ethylene-vinyl alcohol copolymer, second
One in alkene-ethyl acrylate high polymer, polyethyl acrylate, polyamide, polyester or a combination thereof,
Tackifier is Colophonium, modified rosin, liquid rosin, C5 Petropols, C9 Petropols, C5/C9
Copolymer resins, hydrogenation methanoindene resin, hydrogenation C9 resin, terpene resin, rosin ester, hydrogenated wood rosin glycerol ester, benzofuran
A kind of or a combination thereof in resin, terpene resin,
Filler is in barium sulfate, Pulvis Talci, cenosphere, titanium dioxide, white carbon, Kaolin, mica powder
One or a combination thereof,
Plasticizer be glycerol, ethylene glycol, diethylene glycol, 2,2'-ethylenedioxybis(ethanol)., tetraethylene glycol (TEG), propylene glycol, glycerol, in oneself
One in amide, acetamide, Polyethylene Glycol, trihydroxy methyl propane, phthalic acid ester or a combination thereof,
Function additive is a kind of in lubricant, antioxidant, viscosity modifier or a combination thereof.
Metal surface the most according to claim 6 formed dot pattern method, it is characterised in that: by
Described hot water adds appropriate dimethyl sulfoxide or glycerol, stirring hot water or the vibration of ultrasonic wave hot water described hot water of acceleration are molten
The cleaning process of solution type PUR shielding film.
Metal surface the most according to claim 1 forms the method for dot pattern, it is characterised in that: step 3)
And step 5) in, the solid content of this electrophoresis is 5-15%, and pH value is 4-5, and voltage is 45-55V, and the time is 20-50
s。
9. the method forming dot pattern according to the metal surface described in claim 1 or 8, it is characterised in that: institute
The thickness stating the first enamelled coating and the second enamelled coating is 5～30 μm.
Metal surface the most according to claim 1 forms the method for dot pattern, it is characterised in that: step 3)
Or step 5) in, described solidification is baking and curing, solidifies 20-40 minute at 120 DEG C-180 DEG C.
11. metal surfaces according to claim 1 form the method for dot pattern, it is characterised in that:
Described solidification is ultra-violet curing, in 1500-2500mJ/cm after drying 2-10 minute at 60 DEG C-90 DEG C2Ultraviolet
Solidify under light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610505877.5A CN106011977B (en) | 2016-06-30 | 2016-06-30 | A kind of method that metal surface forms dot pattern |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610505877.5A CN106011977B (en) | 2016-06-30 | 2016-06-30 | A kind of method that metal surface forms dot pattern |
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| CN106011977A true CN106011977A (en) | 2016-10-12 |
| CN106011977B CN106011977B (en) | 2018-07-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020651A (en) * | 2019-12-05 | 2020-04-17 | 周大福珠宝金行（深圳）有限公司 | Jewelry processing technology and jewelry |
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| CN115896879A (en) * | 2023-01-06 | 2023-04-04 | 矿冶科技集团有限公司 | Control method for local precise electroplating of part |
| CN115896879B (en) * | 2023-01-06 | 2023-11-07 | 矿冶科技集团有限公司 | Control method for partial accurate electroplating of parts |
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Effective date of registration: 20211111 Address after: 363000 Cai Keng, Xingtai Development Zone, Changtai County, Zhangzhou City, Fujian Province Patentee after: Changtai Kemei kitchen and bathroom Technology Co., Ltd Address before: 362300 Jiumu Industrial Park, Nanan Economic Development Zone, Quanzhou City, Fujian Province Patentee before: Jiumu kitchen & bathroom Co., Ltd |