CN101143502A - Method for manufacturing coating metal plate - Google Patents
Method for manufacturing coating metal plate Download PDFInfo
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- CN101143502A CN101143502A CNA2006101273711A CN200610127371A CN101143502A CN 101143502 A CN101143502 A CN 101143502A CN A2006101273711 A CNA2006101273711 A CN A2006101273711A CN 200610127371 A CN200610127371 A CN 200610127371A CN 101143502 A CN101143502 A CN 101143502A
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Abstract
The invention discloses a coated metal plate production method. The method includes the steps mentioned below. (1) A base plate is treated with surface treatment to meet the requirement of a coating-required base place state. (2) The front and the back sides of the base plate with a surface treatment are coated with a base coating and a back coating respectively. (3) The front side of the base plate is coated with adhesive coating. (4) The base plated with adhesive coating is attached with a polyethylene terephthalate film. The invention has the purposes of providing a coated metal plate production method for an effective adhesive between the polyethylene terephthalate film of the coated metal plate and the coated base plate or the base plate.
Description
Technical field
The present invention relates to a kind of preparation method of coated metallic plate.
Background technology
At present, the chromatic metallic plate of household appliances shell, building internal and external ornament generally adopts colored laminate steel and colored pre-coated steel plate in the prior art.
Colored laminate steel in the existing coated metallic plate comprises substrate, and this substrate can be made by steel plates such as cold-reduced sheet, electrolytic galvanized sheet, heat zinc coating plate, aluminium plating zinc plates.On two faces of substrate, the chemical treatment layer is arranged all.The outer application adhesive layer of substrate front side chemical treatment layer.Adhesive layer mainly is an acrylic resin.Post PETG and polyvinyl chloride (PET/PVC) composite film on the adhesive layer.By carrying out various printing treatment, realize colored laminate steel surface detail pattern at the PET/PVC composite film back side.But can produce chlorine and dioxide gas because the PET/PVC composite membrane is follow-up during as the garbage disposal fusion, environment is polluted.And PET/PVC composite membrane rapidoprint and production technology reason, cost is very high.
A kind of coloured coating precoated steel sheet comprises base material in the existing coated metallic plate, and this base material can be made by steel plates such as cold-reduced sheet, electrolytic galvanized sheet, heat zinc coating plate, aluminium plating zinc plates equally.Scribble the chemical treatment layer on the base material two sides.The positive chemical treatment layer of base material has priming coat and finishing coat outward.Finishing coat posts the PETG layer.Back portion product at the PETG layer also has printed layers.This color painted steel strip can not pollute environment as household appliances shell, but because of being subjected to the restriction of painting color and technology mode, can not form the complicated patterns decorative pattern on the surface.
With the immediate technical scheme of the present invention: the mode of the polyester film (PETG) of fitting on metallic plate at present mainly contains two kinds.A kind of mode is to print the back coated with thermosol on PETG, fits with metallic plate then.But because gluing thickness is bigger on the PETG film, and can not solidify fully before the applying of this glue-line and bottom, roll up the film long storage time phenomenon that can stick together like this.And the technology more complicated of gluing baking on the PETG film, product technology controlling and process difficulty, ink lay and PETG layer were prone to and peel off when full version was printed.Therefore this mode is not suitable for industrial production.Another kind of mode is to print on the PETG of double-layer coextrusion, fits in heat sealability that itself has by the PETG film and special-purpose assorted polyester coatings then.But this mode causes hot sealing layer and coating to intercept because the printing of full version can cause comprehensive covering of PETG, can not produce stickup, can't realize full version printing equally.
Application number is 01261511.0, and denomination of invention discloses a kind of color painted steel strip for the Chinese invention patent of " terephthalic acid glycol ester film color coated steel sheet ".Referring to shown in Figure 1.The described a kind of terephthalic acid glycol ester film color coated steel sheet of this patent; adopt steel plate to make as base material 1; chromate coating 2 is arranged on two face; front coating protection layer 3 and CB coating protective layer 4 are arranged in the outside of chromate coating 2; it is characterized in that; ink lay 5 and noncrystalline PETG rete 6 are arranged on front coating protection layer 3, on noncrystalline PETG rete 6, PETG film 7 is arranged.Can realize the pattern printing though this patent has ink lay 5, but still exist and to expire version printing, PETG film and the bad problem of coating base plate bonding effect.
Therefore, how to realize coated metallic plate PETG film and coating base plate or substrate effectively bonding be the present technical issues that need to address.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of preparation method of coated metallic plate, is used to solve the effectively bonding of the PETG film of coated metallic plate and coating base plate or substrate.
Specifically, the invention discloses a kind of preparation method of coated metallic plate, may further comprise the steps:
1) surface treatment substrate reaches the substrate state that coating requires;
2) to the positive primer coating of surface-treated substrate material, back side coating back of the body lacquer;
3) coating binder on the substrate front side;
4) applying PETG film on the process substrate of coating binder.
Preferably, described step 2 is specially:
21) substrate front side primer coating layer; 22) high-temperature baking solidifies.
Preferably, described step 3 is specially:
31) substrate front side coating binder layer carries out substrate back coating back coating simultaneously;
32) high-temperature baking solidifies.
Preferably, described step 2 further comprises:
23) substrate back coating back of the body enamelled coating;
24) high-temperature baking solidifies.
Described step 3 is specially:
3a) substrate front side coating binder layer;
3b) high-temperature baking solidifies.
Described coating is specially uses steel rider or rubber rollers to carry out roller coat.
Described step 4 adopts overlay film roller applying PETG film.
Also comprise before the described step 4:, form the PETG film carrying out the compound of face coat, printed layers and priming coat on the PETG.
Described adhesive adopts thermosetting type adhesion agent.
Described method also comprises the step 5) cooling processing, covers diaphragm.
Compare with the above-mentioned background technology, because the present invention has been coated with adhesive on the priming paint of substrate front side coating, rather than be coated on the PETG rete, avoided comprehensive rubber cover stick of PETG, cause hot sealing layer and coating to intercept the problem that to paste.The present invention has effectively solved the effectively bonding of coated metallic plate PETG film and coating base plate or substrate by be coated with adhesive and then bonding PETG rete on the priming paint of substrate front side coating.
Description of drawings
Fig. 1 is a prior art overlay film color painted steel strip structural representation;
Fig. 2 is the method for the invention flow chart;
Fig. 3 is a PETG film production process flow diagram flow chart of the present invention;
Fig. 4 is a coated metallic plate structural representation of the present invention.
The specific embodiment
The invention provides a kind of preparation method of coated metallic plate, be used to solve the effective bonding technical problem of coated metallic plate PETG film and coating base plate or substrate.
Below in conjunction with accompanying drawing the specific embodiment of the invention is described.
Referring to Fig. 2, this figure is the method for the invention flow chart.
The preparation method of coated metallic plate of the present invention specifically may further comprise the steps:
S10, surface treatment substrate reach the substrate state that coating requires.
Substrate can be made by steel plates such as cold-reduced sheet, electrolytic galvanized sheet, heat zinc coating plate, aluminium plating zinc plates equally.The surface treatment substrate specifically comprises:
Substrate surface cleaning → drying → surface of steel plate chemical treatment → surface of steel plate oven dry.
The sheet material surface state is regulated on the clean substrate surface, creates and satisfies the substrate state that is coated with reload request.
At first, use special-purpose degreasing agent preparation degreaser, cleaning base plate.Can adopt spray or impregnation method to cooperate the physics scrubbing action cleaning base plate of brush roll, remove the surface contaminants such as greasy dirt, impurity and rusty stain on the substrate.Then, wash or wash and add pure water and wash.So just further clean substrate is regulated the substrate surface state, creates good painting state.At last, carrying out passivation or phosphatization handles.Add the method for baking by roller coat, spray or dipping, reach the paint adhesion and the corrosion resistance that strengthen substrate.
S20, to the positive primer coating of surface-treated substrate material, back side coating back of the body lacquer.
Substrate to pre-treatment is just carrying out successively, CB coating is coated with, high-temperature baking solidifies.
Use agitator that coating is stirred, adjust parameters such as paint viscosity, temperature, guarantee the processing performance of coating.Be coated with through carrying out coating on the substrate of pre-treatment: use special-purpose steel rider or rubber rollers to be coated with.Coating method can be to carry material roller to add applicator roll or carry material roller and add guide roller and add applicator roll and be coated with.The coating direction can be coated with or contrary being coated with for suitable.The thickness, profile pattern of coating can be realized by adjusting between each applicator roll the gap between the rotating ratio and each roller.The substrate of coating is cured by the baking oven high-temperature baking.
Coating binder on S30, the substrate front side priming paint.
Carrying out special-purpose adhesive coating, the high-temperature baking of pasting PETG solidifies.
The present invention uses special-purpose thermosetting type adhesion agent, can be one-pack-type or dual liquid type adhesive.Use special-purpose thermosetting type adhesion agent to solve the applying problem of PETG film on the metallic plate coiled material.This adhesive is a kind ofly to be exclusively used in PETG, to print PETG or aluminize PETG film and treated steel plate or painted steel sheet carry out the thermosetting type adhesion agent that high-temperature baking is fitted.On the coating metal plate adhesive solidification and fit with polyester film after, show good adhesion with substrate or japanning substrate and printing ink.This thermosetting type adhesion agent dissolves in toluene, cyclohexanone and ethyl acetate etc., be exclusively used in the color painted steel strip of cold-reduced sheet, electrolytic galvanized sheet, heat zinc coating plate, aluminium plating zinc plate and the specially treated of process coating through chromium-free treatment, have extremely strong stickup performance and permeability through behind the high-temperature baking, can guarantee the adhibit quality between printed layers and PETG, the steel plate/coating, and long shelf-life.
S40, the PETG of on the process substrate of coating binder, fitting.
Utilization have the overlay film roller of certain pressure, temperature and tension force smooth PETG, be fitted in through coating and high-temperature baking and solidify on the substrate of handling closely.The overlay film roller adopts certain degree of hardness and flexible high-temperature resistant rubber roller, also can select special-purpose steel rider for use.The pressure of overlay film roller, tension force can be regulated by regulating hydraulic pressure or pneumatic system, and the temperature of overlay film roller can be regulated by the electric heating system of overlay film roller inside.
First kind of specific embodiment of the preparation method of coated metallic plate of the present invention:
S10, surface treatment substrate reach the substrate state that coating requires.Concrete processing mode is same as above, does not repeat them here.
S21, the coating of substrate front side prime coat.Use special-purpose steel rider or rubber rollers that substrate front side is coated with.
S22, high-temperature baking solidify.The substrate of coating front priming paint is cured by the baking oven high-temperature baking.
The coating of substrate back back coating is carried out in S31, the coating of substrate front side adhesive layer simultaneously.Use the substrate front side coating binder layer after special-purpose steel rider or rubber rollers are handled step S22, use special-purpose steel rider or rubber rollers that substrate back is coated with simultaneously.
S32, high-temperature baking solidify.Substrate after step S31 handles is cured by the baking oven high-temperature baking.
Second kind of specific embodiment of the preparation method of coated metallic plate of the present invention:
S10, surface treatment substrate reach the substrate state that coating requires.Concrete processing mode is same as above, does not repeat them here.
The coating of substrate back back coating is carried out in S21, the coating of substrate front side adhesive layer simultaneously.Use the substrate front side coating binder layer after special-purpose steel rider or rubber rollers are handled step S10, use special-purpose steel rider or rubber rollers that substrate back is coated with simultaneously.
S22, high-temperature baking solidify.Substrate after step S21 handles is cured by the baking oven high-temperature baking.
The third specific embodiment of the preparation method of coated metallic plate of the present invention:
S10, surface treatment substrate reach the substrate state that coating requires.Concrete processing mode is same as above, does not repeat them here.
S21, the coating of substrate front side prime coat.Use special-purpose steel rider or rubber rollers that substrate front side is coated with.
S22, high-temperature baking solidify.The substrate of coating front priming paint is cured by the baking oven high-temperature baking.
S23, the coating of substrate back coating.Use special-purpose steel rider or rubber rollers that substrate back is coated with.
S24, high-temperature baking solidify.The substrate of coating front priming paint and back side back of the body lacquer is cured by the baking oven high-temperature baking.
S3a, the coating of substrate front side adhesive layer.Use the substrate front side coating binder layer after special-purpose steel rider or rubber rollers are handled step S22.
S3b, high-temperature baking solidify.Substrate after step S3a handles is cured by the baking oven high-temperature baking.
S40, through applying PETG film on the substrate of coating binder.
Utilization have the overlay film roller of certain pressure, temperature and tension force smooth PETG, be fitted in through coating and high-temperature baking and solidify on the substrate of handling closely.
Preferred implementation of the present invention is the step that has increased cooling processing behind step S40, covered diaphragm.
Cooling processing, cover diaphragm and be specially: the coated metallic plate that will attach the PETG film carries out cooling processing, and the temperature of coated metallic plate is reduced near environment temperature.Cover diaphragm, technology and step S40 overlay film are similar, and difference do not need to be the overlay film roller is heated.
Cooling can be adopted air-cooled or water-cooling pattern carries out.Air cooling way can use the power air blast of multikilowatt, and the cooling duct needs several meters not wait to tens meters.Water-cooling pattern can adopt spray or dipping method to carry out.Constantly circulate by cooling water, reduce this coating metal plate temperature rapidly.
Cover diaphragm, technology and overlay film are similar, and difference is not need the overlay film roller is heated.Cover that diaphragm can be avoided various in coated metallic plate transportation, the process to damage, put hindering and scuffing etc., that improves coated metallic plate goes out sanction rate, qualification rate.
Introduce PETG film production process of the present invention below.
Referring to Fig. 3, this figure is a PETG film production process flow diagram flow chart of the present invention.
PETG film production process of the present invention is to carrying out the compound of face coat, printed layers and priming coat on the PETG, forming the PETG film.Specifically may further comprise the steps:
A, PETG is carried out sided corona treatment.
By corona treatment plant generation high-frequency and high-voltage or intermediate frequency high pressure the PETG surface is handled, make PETG membrane surface tension force reach 38-44mN/m.
Sided corona treatment is that a kind of electric shock is handled, and it makes the surface of stock have higher tack.Its principle is to utilize the high-frequency high voltage at processed frosting corona discharge, and produces low temperature plasma, makes frosting produce radical reaction.The surface roughening also increases it the wetting of polar solvent is recalled.These gas ions are by electric shock and penetrate into by its molecular structure of surface breakdown of seal body, and then with processed surface molecular oxidation and polarization, ion electric shock erosion surface consequently increases the adhesive ability on stock surface.Sided corona treatment rearranges stock surface molecular structure, produces more polar fraction, helps adhering to foreign object.
B, print respectively, primary coat, surface treatment, and wear out, drying.
PETG after can selecting intaglio printing, flexographic plate or other mode of printings to sided corona treatment prints.Intaglio press printing is specifically adopted in intaglio printing.Flexographic printing specifically adopts flexographic presses printing.Primary coat is similar with printing, can use different rollers to realize.
Use printing-ink on basement membrane, to carry out notch board or printing, can realize various decorative patterns, pattern effect flexibly by the surface detail that changes print roller.
Basement membrane is handled through carrying out primary coat behind the corona, printing treatment, and primary coat is handled and can be realized that background color sets off and strengthens adhesive force.And under certain temperature and pressure condition, single face can directly be fitted with described dope layer or aluminium sheet, steel plate by thermosetting type adhesion agent, not only can satisfy the outward appearance effect of decorative patterns, particularly full edition special-effect, and can guarantee properties of product requirements such as film adhesion, be applicable to purposes such as household electrical appliance, interior decoration, ceiling, elevator decoration.Actual temp and pressure will be adjusted according to thickness, the line speed of sheet material.
Printed layers can realize full version, by adjusting ink formulations, at interpolation auxiliary agents such as printing ink, improves the adhesion property of printing ink and PETG layer, and adopts more sparse ink printing, guarantees the infiltration of glue, promotes the film adhesion after fitting.Printing ink can adopt PETG plastic sheeting tailored version printing ink.Such as the printing ink of forming based on PU synthetic resin (polyurethane is matrix resin) and senior pigment and organic solvent etc.The auxiliary agent that this printing ink increases can be mixed solvents such as ketone, alcohol.
In addition, in order to strengthen the adhesive force between PETG and printing ink, the priming coat, also can handle or use curing agent or select the adhesive force better material to realize the close attachment of each interlayer the back side of PETG film.
Printed layers can also adopt serigraphy, but serigraphy can only be to the single steel plate stamp, and print speed printing speed is slow.
The present invention can use the 10-150um PETG as basement membrane.This basement membrane can be as PETG film required for the present invention after specially treateds such as corona, printing, primary coat and surface treatment.
By conversion film formulation and increase film after-processing technology, can realize lustrous surface, aquatic foods degree of reflecting and three-dimensional pattern effect.Handle the realization matt effect by described basement membrane being carried out delustring.Equally to described basement membrane carry out surface treatment can realize in light, high light effect, lustrous surface aquatic foods degree of reflecting and three-dimensional pattern effect.Light, high light effect, lustrous surface aquatic foods degree of reflecting and three-dimensional pattern effect during the present invention also can realize by production technology, the composition of raw materials of regulating basement membrane.
How specify described basement membrane delustring below realizes.
1, adds the delustering agent delustring.In the basement membrane factory formula, add a certain proportion of delustering agent such as titanium dioxide delustering agent, produce the delustring basement membrane.
2, UV delustring:, solidify the realization delustring through UV at membrane surface coating UV delustred coating.
The metal structure of the coated metallic plate of being made by the method for the invention is referring to shown in Figure 4.
Because the present invention has been coated with adhesive on the priming paint of substrate front side coating, rather than be coated on the PETG rete, avoid comprehensive rubber cover stick of PETG, caused hot sealing layer and coating to intercept the problem that to paste.The present invention has effectively solved the effective bonding technical problem of coated metallic plate PETG film and substrate or coating base plate by being coated with adhesive and then bonding PETG rete at substrate or on the priming paint of substrate front side coating.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the preparation method of a coated metallic plate is characterized in that, this method may further comprise the steps:
1) surface treatment substrate reaches the substrate state that coating requires;
2) to the positive primer coating of surface-treated substrate material, back side coating back of the body lacquer;
3) coating binder on the substrate front side;
4) applying PETG film on the process substrate of coating binder.
2. the preparation method of coated metallic plate according to claim 1 is characterized in that, described step 2 is specially:
21) substrate front side primer coating layer; 22) high-temperature baking solidifies.
3. the preparation method of coated metallic plate according to claim 2 is characterized in that, described step 3 is specially:
31) substrate front side coating binder layer carries out substrate back coating back coating simultaneously;
32) high-temperature baking solidifies.
4. the preparation method of coated metallic plate according to claim 2 is characterized in that, described step 2 further comprises:
23) substrate back coating back of the body enamelled coating;
24) high-temperature baking solidifies.
5. the preparation method of coated metallic plate according to claim 4 is characterized in that, described step 3 is specially:
3a) substrate front side coating binder layer;
3b) high-temperature baking solidifies.
6. the preparation method of coated metallic plate according to claim 1 is characterized in that, described coating is specially uses steel rider or rubber rollers to carry out roller coat.
7. the preparation method of coated metallic plate according to claim 1 is characterized in that, described step 4 adopts overlay film roller applying PETG film.
8. according to the preparation method of the arbitrary described coated metallic plate of claim 1 to 7, it is characterized in that, also comprise before the described step 4:, form the PETG film carrying out the compound of face coat, printed layers and priming coat on the PETG.
9. the preparation method of coated metallic plate according to claim 1 is characterized in that, described adhesive adopts thermosetting type adhesion agent.
10. the preparation method of coated metallic plate according to claim 1 is characterized in that, described method also comprises the step 5) cooling processing, covers diaphragm.
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| CNA2006101273711A CN101143502A (en) | 2006-09-15 | 2006-09-15 | Method for manufacturing coating metal plate |
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| CNA2006101273711A CN101143502A (en) | 2006-09-15 | 2006-09-15 | Method for manufacturing coating metal plate |
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