CN109332118B - Pull ring material suitable for laser processing and preparation method thereof - Google Patents

Pull ring material suitable for laser processing and preparation method thereof Download PDF

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CN109332118B
CN109332118B CN201811092693.6A CN201811092693A CN109332118B CN 109332118 B CN109332118 B CN 109332118B CN 201811092693 A CN201811092693 A CN 201811092693A CN 109332118 B CN109332118 B CN 109332118B
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coating
parts
temperature
passivation
laser processing
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CN109332118A (en
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王清山
杜文斌
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Zouping Xinsanyuan Aluminum Co ltd
Shandong Longkou Sanyuan Aluminium Co ltd
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Zouping Xinsanyuan Aluminum Co ltd
Shandong Longkou Sanyuan Aluminium Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B05D3/0272—After-treatment with ovens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0466—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a non-reacting gas
    • B05D3/0473—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a non-reacting gas for heating, e.g. vapour heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B05D7/574—Three layers or more the last layer being a clear coat at least some layers being let to dry at least partially before applying the next layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

The invention discloses a pull ring material suitable for laser processing and a preparation method thereof.A specific inner layer coating and an outer layer coating are adopted, and the inner layer coating can resist the high temperature during laser processing by reasonable proportioning, so that the aluminum base material is prevented from being damaged during laser processing, the aluminum base material is protected, and the reduction of the yield strength and the tensile strength of the aluminum base material is avoided; the pull ring material prepared by the method is suitable for laser processing and has excellent laser processing performance; meanwhile, the product has decorative property, different colors can be selected according to the package, different requirements of customers are met, the individuality of the product is reflected, and the product can be subjected to laser two-dimensional code and characters, so that the product has an anti-counterfeiting function; in addition, the invention has simple process and low production cost, can effectively reduce the pollution to the environment, reduce the times of coating and printing, reduce the discharge of VOCS and has good economic and social benefits.

Description

Pull ring material suitable for laser processing and preparation method thereof
Technical Field
The invention belongs to the field of novel composite materials, and particularly relates to a pull ring material suitable for laser processing and a preparation method thereof.
Background
The traditional pull ring material has the function of opening the pop can after being assembled by a combiner, and generally has no laser-bearing process. Meanwhile, the traditional tab material adopts common organic coating, and has single color; the traditional ring-pulling material cannot be subjected to laser processing due to the restriction of the production process and the characteristics of the coating, if the ring-pulling material is subjected to forced processing, patterns or characters after laser processing are blurred, and a coating layer falls off when the ring-pulling material is processed into a ring-pulling.
There is the technique that carries out single face processing laser film to the substrate at present, but to two-sided radium-shine, if control is not good, when the overprinting is carried out in local radium-shine pattern and printing ink region, often can produce the clearance in overprinting regional edge position, influence product quality, two-sided laser film on the market at present, mostly be two-sided monochromatic whole version laser film, the produced large tracts of land scintillation effect of whole face laser line layer can influence some needs salient visual effect of salient part of printed matter, and because this kind of aesthetic feeling is easy to be vulcably established, be difficult to satisfy different crowds' needs, also do not be favorable to anti-fake simultaneously.
In the traditional laser mould pressing process, in the preparation process of materials containing a laser layer, such as laser products and the like, a paper base layer or a film base layer is coated with paint through a coating roll, and then the paper base layer or the film base layer is dried in an oven, wherein the temperature is about 130 ℃ generally, so that a coating is obtained; and then heating and pressing the plate roller coated with the laser working plate to form a laser layer on the coating, wherein the heating and pressing temperature is about 180 ℃ generally. The laser molding method has the advantages of poor process continuity, environmental pollution, high production cost, obvious influence on the yield strength of the aluminum substrate, reduced yield strength, incapability of bearing higher temperature, low adhesive force of the coating, easy falling of the coating and easy generation of cracking.
Disclosure of Invention
The invention provides a ring-pull material suitable for laser processing and a preparation method thereof, and solves the problems of single color, unclear patterns or characters after laser, easy shedding of a coating, no anti-counterfeiting function, high production cost, reduced yield strength, no high temperature resistance and low adhesion of the coating in the prior art.
The specific technical scheme is as follows:
a preparation method of a pull ring material suitable for laser processing comprises the following steps: continuously unreeling through an unreeling machine, conveying the aluminum substrate into a material storage machine, and then cleaning with alkali liquor prepared by mixing pure water and alkali; drying water by a dryer at the drying temperature of 80-90 ℃, cooling to 40 ℃, performing chromium passivation, coating a layer of passivation solution on the front and back surfaces of a material roll by using a roller, wherein the proportion of the adopted passivation solution is passivation stock solution: 1: 5 of purified water, drying the water in the passivation solution by hot air in a curing furnace after passivation, wherein the drying temperature is 80-90 ℃ to form a passivation film, cooling to 40 ℃, then performing first coating on the upper surface of a material roll after chromization by using a coating machine to obtain a high-temperature resistant inner coating, performing coating on the lower surface of the material roll by using the coating machine again to obtain an epoxy outer coating, drying by using an oven A, cooling to 40 ℃, and wherein the temperatures of three heating zones of the oven A are 180 ℃, 220 ℃ and 200 ℃ respectively; and (3) coating the upper surface of the coil again by using the coating machine for the second time to obtain an epoxy outer coating, drying the coil by using an oven B, and cooling the coil to 40 ℃, wherein the temperatures of three heating areas of the oven B are 220 ℃, 260 ℃ and 230 ℃ respectively to obtain the pull ring material suitable for laser processing.
Preferably, the high-temperature-resistant inner coating comprises the following raw materials in parts by weight: 40-50 parts of epoxy resin, 10-15 parts of amino resin, 1-5 parts of high-temperature-resistant organic pigment, 0-0.5 part of dispersing agent, 15-20 parts of aromatic hydrocarbon solvent, 10-15 parts of ethylene glycol monobutyl ether, 1-5 parts of n-butyl alcohol and 10-20 parts of propylene glycol monomethyl ether acetate.
Preferably, the epoxy outer coating comprises the following raw materials in parts by weight: 15-25 parts of ethylene glycol monobutyl ether, 5-10 parts of a dibasic ester mixture, 15-25 parts of propylene glycol monomethyl ether acetate, 1-5 parts of n-butyl alcohol, 15-20 parts of an aromatic hydrocarbon solvent, 0-0.1 part of formaldehyde and 3-8 parts of nano graphite powder.
Preferably, the high-temperature resistant inner coating or the epoxy outer coating is prepared according to respective formula proportion and then mixed by a special device for stirring and heating the coating.
Preferably, when the aluminum substrate is cleaned, the conductivity of the adopted water is less than 50s/m, the pH value of the alkali liquor is 9-11, and the temperature is controlled at 40-45 ℃.
Preferably, the first coating of the coil is performed under argon atmosphere and under a vacuum degree of 2.0X 10-2～3.5×10-2Carrying out primary coating under the conditions of Pa, the temperature of 300-400 ℃ and 200-300V to obtain a high-temperature-resistant inner coating; the second coating is performed in helium atmosphere and vacuum degree of 1.5 × 10-2～3.0×10-2Carrying out secondary coating under the conditions of Pa, 300-400 ℃ and 150-500V to obtain an epoxy outer coating; the third coating is in helium atmosphere and vacuum degree of 3.0 × 10-2～4.0×10-2Obtaining the epoxy outer coating under the conditions of Pa, the temperature of 400-500 ℃ and 200-300V.
Preferably, the passivation stock solution comprises the following raw materials in parts by weight: 0.1-1 part of hydrofluoric acid, 20-30 parts of nitric acid and 1-10 parts of trivalent chromium.
Preferably, when the material roll is coated, the rotation speed of a material carrying roller of the coating machine is 50r/min, the rotation speed of a metering roller is 60r/min, and the rotation speed of an coating roller is 75 r/min.
A pull ring material suitable for laser processing comprises an aluminum substrate, wherein a high-temperature-resistant inner coating and an epoxy outer coating are sequentially compounded on the upper surface of the aluminum substrate; the lower surface of the aluminum substrate is compounded with an epoxy outer coating.
Has the advantages that:
1. the pull ring material prepared by the method is suitable for laser processing, and has excellent laser processing performance; meanwhile, the product has decorative property, different colors can be selected according to the package, different requirements of customers are met, the individuality of the product is reflected, and the product can be subjected to laser two-dimensional code and characters, so that the product has an anti-counterfeiting function; in addition, the invention has simple process and low production cost, can effectively reduce the pollution to the environment, reduce the times of coating and printing, reduce the discharge of VOCS and has good economic and social benefits.
2. According to the coating material adopted by the invention, the inner layer is the high-temperature-resistant coating, the outer layer is the epoxy outer coating, and the inner layer coating can resist the high temperature during laser processing through reasonable proportioning, so that the aluminum substrate is prevented from being damaged during laser processing, the aluminum substrate is protected, and the yield strength and the tensile strength of the aluminum substrate are prevented from being reduced.
3. In the preparation process of the pull ring material, the material roll is cooled to 40 ℃ before chromium passivation, after chromium passivation and drying, after drying in the drying oven A and after drying in the drying oven B, so that the leveling property of each coating obtained in the steps can be effectively improved, the coating is more smooth, the coating is more easily adhered to the coating when the next step of coating is carried out, and the adhesive force of the coating is improved.
4. When coating is carried out, the temperatures of three heating zones of an oven A are respectively 180 ℃, 220 ℃ and 200 ℃, the temperatures of three heating zones of an oven B are respectively 220 ℃, 260 ℃ and 230 ℃, because the inner layer coating is required to be cured at low temperature, the temperature during curing is required to be lower than 210 ℃, different temperature settings are adopted for the oven A, the requirement that the inner coating is required to be cured at low temperature can be met, the problem that the curing is incomplete due to too low temperature can be avoided, and the problem that the curing speed is too high due to too high temperature, so that the leveling property of the coating is low and the subsequent coating is not easy to combine is also avoided; in addition, because the aluminum base material can not bear twice high-temperature drying, three temperatures with different grades are adopted, the reduction of the yield strength and the tensile strength of the aluminum base material is favorably prevented, and the improvement of the mechanical property of the pull ring material is favorably realized.
5. When coating is carried out, the material roll is placed in a specific environment, and when the material roll is coated for the first time, the material roll is in an argon environment and the vacuum degree is 2.0 multiplied by 10-2～3.5×10-2Pa, the temperature of 300-400 ℃ and the temperature of 200-300V, because the first coating is a high-temperature resistant coating, the curing process is involved, and the high temperature resistance and invariability after curing are required, the argon environment is selected when the first coating is performed, the metastable state energy level of the argon is only 11.5eV, the metastable state energy level is lower, the first ionization energy is smaller, and the metastable state energy level is 2.0 multiplied by 10V-2～3.5×10-2The properties of various raw materials in the high-temperature-resistant coating can be effectively protected from being damaged under the vacuum degree of Pa, the high-temperature-resistant coating is protected, and the components of the raw materials are prevented from being damaged due to overhigh ionization energy; in a helium environment when the second and third coatings are carried out, helium is in a high-energy metastable primary helium environmentThe metastable state energy level of the molecule is 11.7eV, metastable state atoms or molecules with higher energy and longer service life can be generated, and the metastable state particles can release free electrons by colliding with other particles, so that the molecules in the raw material can be connected more tightly, the leveling property is improved, and the bonding strength with an aluminum substrate and a high-temperature resistant coating is enhanced.
6. When the high-temperature-resistant inner coating and the epoxy outer coating are mixed, a special device for stirring and heating the coating is adopted, and a conveying device of the device sucks the coating in the storage device and conveys the coating into a heating device, so that the coating is heated in the heating device, gaps among molecules are reduced, molecules in all raw materials are tightly combined, and the improvement of the adhesive force of the inner coating and the outer coating is facilitated; the heat exchange tube is designed to be spiral, so that the contact area between the heat exchange tube and the liquid heating medium is increased, the heating time of the coating is prolonged, the coating is heated more sufficiently, and the stability of the coating is better enhanced.
Drawings
FIG. 1 is a schematic view of a special apparatus for stirring and heating a coating;
FIG. 2 is a schematic view of the structure of the telescopic device
FIG. 3 is a schematic structural view of a tab material;
FIG. 4 is a process flow diagram for processing a tab stock;
the reference numerals have the meanings: 10. the heating device comprises a heating device, 11 parts of a heating barrel, 14 parts of a heater, 20 parts of a conveying device, 21 parts of a heat exchange pipe, 22 parts of a liquid inlet pipe, 23 parts of a pump, 24 parts of a liquid outlet pipe, 30 parts of a telescopic device, 31 parts of a cylinder A, 32 parts of a cylinder B, 33 parts of a connecting block A, 34 parts of a connecting block B, 35 parts of a barrel body A, 36 parts of a barrel body B, 40 parts of a stirring device, 41 parts of a fixed seat, 42 parts of a gear ring, 43 parts of a gear, 44 parts of a driving mechanism A, 45 parts of a driving mechanism B, 46 parts of a coupler, 47 parts of a stirring rod, 48 parts of blades, 50 parts of a storage device, 51 parts of a stirring barrel, 52 parts of a liquid discharge pipe, 53 parts of a valve, 6-epoxy outer coating, 7-high temperature resistant inner coating, 8-aluminum base material and 9-epoxy outer coating.
Detailed Description
The model of the oven A is TB250-400, and the model of the oven B is TB 280-400.
Example (b): the embodiments of the present invention will be described in detail with reference to the following examples.
Example 1:
the high-temperature-resistant inner coating comprises the following raw materials in parts by weight: 40 parts of epoxy resin, 11 parts of amino resin, 2 parts of high-temperature-resistant organic pigment, 16 parts of aromatic solvent, 10 parts of ethylene glycol monobutyl ether, 3 parts of n-butanol and 10 parts of propylene glycol methyl ether acetate.
The epoxy outer coating comprises the following raw materials in parts by weight: 25 parts of ethylene glycol monobutyl ether, 5 parts of a dibasic ester mixture, 15 parts of propylene glycol methyl ether acetate, 1 part of n-butanol, 15 parts of an aromatic hydrocarbon solvent and 8 parts of nano graphite powder.
The passivation stock solution comprises the following raw materials in parts by weight: 0.1 part of hydrofluoric acid, 20 parts of nitric acid and 10 parts of trivalent chromium.
A preparation method of a pull ring material suitable for laser processing comprises the following steps: continuously unreeling through an unreeling machine, conveying the aluminum substrate into a material storage machine, then cleaning with an alkali liquor prepared by mixing pure water and alkali, wherein the conductivity of the adopted water is 40s/m, the pH value of the alkali liquor is 9, and the temperature is controlled at 40 ℃; drying water by a dryer at the drying temperature of 80-90 ℃, cooling to 40 ℃, performing chromium passivation, coating a layer of passivation solution on the front and back surfaces of a material roll by using a roller, wherein the proportion of the adopted passivation solution is passivation stock solution: purified water of 5:1, drying the water in the passivation solution with hot air in a curing furnace at 80-90 ℃ after passivation to form a passivation film, wherein the thickness of the passivation film is 5 mu m, and the chromium content on the surface of the passivation film is 13mg/m2Cooling to 40 ℃, performing primary coating on the upper surface of the material roll by the aid of the coating machine after chromizing to obtain a high-temperature-resistant inner coating, performing coating on the lower surface of the material roll by the aid of the coating machine again to obtain an epoxy outer coating, drying by the aid of the drying oven A to 40 ℃, performing secondary coating on the upper surface of the material roll by the aid of the coating machine again, wherein the rotating speed of a material carrying roller of the coating machine is 50r/min, the rotating speed of a metering roller is 60r/min, the rotating speed of a coating roller is 75r/min, the epoxy outer coating is obtained, drying by the aid of the drying oven B, cooling to 40 ℃, and the drying ovenThe temperature of the three heating zones B is 220 ℃, 260 ℃ and 230 ℃ respectively, and the pull ring material suitable for laser processing is obtained.
Wherein, when the first coating is carried out on the material roll, the coating is carried out in an argon environment and the vacuum degree is 2.7 multiplied by 10-2Carrying out primary coating under the conditions of Pa, the temperature of 300 ℃ and 200V to obtain a high-temperature-resistant inner coating; the second coating was performed in a helium atmosphere at a vacuum of 1.510-2Carrying out secondary coating under the conditions of Pa, 320 ℃ and 300V to obtain an epoxy outer coating; the third coating is in helium atmosphere and vacuum degree of 3.5X 10-2And obtaining the epoxy outer coating under the conditions of Pa, 400 ℃ and 300V.
Example 2:
the high-temperature-resistant inner coating comprises the following raw materials in parts by weight: 42 parts of epoxy resin, 12 parts of amino resin, 1 part of high-temperature-resistant organic pigment, 0.1 part of dispersing agent, 18 parts of aromatic solvent, 15 parts of ethylene glycol monobutyl ether, 5 parts of n-butanol and 16 parts of propylene glycol methyl ether acetate.
The epoxy outer coating comprises the following raw materials in parts by weight: the composite material comprises 18 parts of ethylene glycol monobutyl ether, 8 parts of a dibasic ester mixture, 20 parts of propylene glycol methyl ether acetate, 3 parts of n-butanol, 18 parts of an aromatic hydrocarbon solvent and 7 parts of nano graphite powder.
The passivation stock solution comprises the following raw materials in parts by weight: 0.8 part of hydrofluoric acid, 25 parts of nitric acid and 4 parts of trivalent chromium.
A preparation method of a pull ring material suitable for laser processing comprises the following steps: continuously unreeling through an unreeling machine, conveying the aluminum substrate into a material storage machine, then cleaning with alkali liquor prepared by mixing pure water and alkali, wherein the conductivity of the adopted water is 35s/m, the pH value of the alkali liquor is 10, and the temperature is controlled at 41 ℃; drying water by a dryer at the drying temperature of 80-90 ℃, cooling to 40 ℃, performing chromium passivation, coating a layer of passivation solution on the front and back surfaces of a material roll by using a roller, wherein the proportion of the adopted passivation solution is passivation stock solution: purified water of 5:1, drying the water in the passivation solution with hot air in a curing furnace at 80-90 ℃ after passivation to form a passivation film, wherein the thickness of the passivation film is 6 mu m, and the chromium content on the surface of the passivation film is 15mg/m2Side, cooling to 40 ℃ and then chromiumThe method comprises the steps of firstly coating the upper surface of a material roll after melting through a coating machine to obtain a high-temperature-resistant inner coating, secondly coating the lower surface of the material roll through the coating machine to obtain an epoxy outer coating, thirdly drying the material roll through an oven A, cooling the material roll to 40 ℃, enabling the temperatures of three heating zones of the oven A to be 180 ℃, 220 ℃ and 200 ℃, thirdly coating the upper surface of the material roll through the coating machine for the second time, enabling the rotating speed of a material carrying roller of the coating machine to be 50r/min, the rotating speed of a metering roller to be 60r/min, the rotating speed of a coating roller to be 75r/min, obtaining the epoxy outer coating, fourthly drying the material roll through an oven B, cooling the material roll to 40 ℃, enabling the temperatures of three heating zones of the oven B to be 220 ℃, 260 ℃ and 230 ℃, and obtaining the pull ring material suitable for laser processing.
Wherein, when the first coating is carried out on the material roll, the coating is carried out in an argon environment and the vacuum degree is 3.0 multiplied by 10-2Coating for the first time under the conditions of Pa, 380 ℃ and 230V to obtain a high-temperature-resistant inner coating; the second coating is performed in helium atmosphere and vacuum degree of 2.6 × 10-2Carrying out secondary coating under the conditions of Pa, 310 ℃ and 200V to obtain an epoxy outer coating; the third coating is in helium atmosphere and vacuum degree of 3.4X 10-2Pa, 440 ℃ and 280V to obtain the epoxy outer coating.
Example 3:
the high-temperature-resistant inner coating comprises the following raw materials in parts by weight: 46 parts of epoxy resin, 13 parts of amino resin, 5 parts of high-temperature-resistant organic pigment, 0.5 part of dispersing agent, 15 parts of aromatic solvent, 14 parts of ethylene glycol monobutyl ether, 2 parts of n-butanol and 13 parts of propylene glycol methyl ether acetate.
The epoxy outer coating comprises the following raw materials in parts by weight: 15 parts of ethylene glycol monobutyl ether, 7 parts of a dibasic ester mixture, 18 parts of propylene glycol methyl ether acetate, 4 parts of n-butanol, 20 parts of an aromatic hydrocarbon solvent and 6 parts of nano graphite powder.
The passivation stock solution comprises the following raw materials in parts by weight: 0.8 part of hydrofluoric acid, 27 parts of nitric acid and 5 parts of trivalent chromium.
A preparation method of a pull ring material suitable for laser processing comprises the following steps: continuously unreeling through an unreeling machine, and conveying the aluminum base material to a material storage machineThen, washing with an alkali liquor prepared by mixing pure water and alkali, wherein the conductivity of the adopted water is 45s/m, the pH value of the alkali liquor is 11, and the temperature is controlled at 45 ℃; drying water by a dryer at the drying temperature of 80-90 ℃, cooling to 40 ℃, performing chromium passivation, coating a layer of passivation solution on the front and back surfaces of a material roll by using a roller, wherein the proportion of the adopted passivation solution is passivation stock solution: purified water of 5:1, drying the water in the passivation solution with hot air in a curing furnace at 80-90 ℃ after passivation to form a passivation film, wherein the thickness of the passivation film is 5 mu m, and the chromium content on the surface of the passivation film is 13mg/m2side, cooling to 40 ℃, then coating the upper surface of the material coil with the chromized material coil for the first time through a coating machine to obtain a high-temperature resistant inner coating, coating the lower surface of the material coil with the coating machine again to obtain an epoxy outer coating, then drying the material by an oven A, cooling the material to 40 ℃, wherein the temperatures of three heating areas of the oven A are respectively 180 ℃, 220 ℃ and 200 ℃, and when the material roll passes through the coating machine again, coating the upper surface for the second time, the rotating speed of the material carrying roller of the coating machine is 50r/min, the rotating speed of the metering roller is 60r/min, the rotating speed of the coating roller is 75r/min, and an epoxy outer coating is obtained, and then drying the ring-pulling section bar by an oven B, cooling the ring-pulling section bar to 40 ℃, wherein the temperatures of three heating zones of the oven B are 220 ℃, 260 ℃ and 230 ℃ respectively, and thus the ring-pulling section bar suitable for laser processing is obtained.
Wherein, when the first coating is carried out on the material roll, the coating is carried out in an argon environment and the vacuum degree is 3.5 multiplied by 10-2Carrying out primary coating under the conditions of Pa, the temperature of 330 ℃ and 220V to obtain a high-temperature-resistant inner coating; the second coating is performed in helium atmosphere and vacuum degree of 3.0 × 10-2Carrying out secondary coating under the conditions of Pa, 400 ℃ and 400V to obtain an epoxy outer coating; the third coating is in helium atmosphere and vacuum degree of 3.5X 10-2Pa, 500 ℃ and 280V to obtain the epoxy outer coating.
Example 4:
the high-temperature-resistant inner coating comprises the following raw materials in parts by weight: 50 parts of epoxy resin, 15 parts of amino resin, 3 parts of high-temperature-resistant organic pigment, 0.3 part of dispersing agent, 20 parts of aromatic solvent, 12 parts of ethylene glycol monobutyl ether, 1 part of n-butanol and 20 parts of propylene glycol methyl ether acetate.
The epoxy outer coating comprises the following raw materials in parts by weight: 22 parts of ethylene glycol monobutyl ether, 10 parts of a dibasic ester mixture, 25 parts of propylene glycol methyl ether acetate, 5 parts of n-butanol, 16 parts of an aromatic hydrocarbon solvent, 0.1 part of formaldehyde and 3 parts of nano graphite powder.
The passivation stock solution comprises the following raw materials in parts by weight: 1 part of hydrofluoric acid, 30 parts of nitric acid and 9 parts of trivalent chromium.
A preparation method of a pull ring material suitable for laser processing comprises the following steps: continuously unreeling through an unreeling machine, conveying the aluminum substrate into a material storage machine, then cleaning with alkali liquor prepared by mixing pure water and alkali, wherein the conductivity of the adopted water is 30s/m, the pH value of the alkali liquor is 10, and the temperature is controlled at 42 ℃; drying water by a dryer at the drying temperature of 80-90 ℃, cooling to 40 ℃, performing chromium passivation, coating a layer of passivation solution on the front and back surfaces of a material roll by using a roller, wherein the proportion of the adopted passivation solution is passivation stock solution: purified water of 5:1, drying the water in the passivation solution with hot air in a curing furnace at 80-90 ℃ after passivation to form a passivation film, wherein the thickness of the passivation film is 7 mu m, and the chromium content on the surface of the passivation film is 8mg/m2side, cooling to 40 ℃, then coating the upper surface of the material coil with the chromized material coil for the first time through a coating machine to obtain a high-temperature resistant inner coating, coating the lower surface of the material coil with the coating machine again to obtain an epoxy outer coating, then drying the material by an oven A, cooling the material to 40 ℃, wherein the temperatures of three heating areas of the oven A are respectively 180 ℃, 220 ℃ and 200 ℃, and when the material roll passes through the coating machine again, coating the upper surface for the second time, the rotating speed of the material carrying roller of the coating machine is 50r/min, the rotating speed of the metering roller is 60r/min, the rotating speed of the coating roller is 75r/min, and an epoxy outer coating is obtained, and then drying the ring-pulling section bar by an oven B, cooling the ring-pulling section bar to 40 ℃, wherein the temperatures of three heating zones of the oven B are 220 ℃, 260 ℃ and 230 ℃ respectively, and thus the ring-pulling section bar suitable for laser processing is obtained.
Wherein, when the first coating is carried out on the material roll, the coating is carried out in an argon environment and the vacuum degree is 2.4 multiplied by 10-2Coating for one time under the conditions of Pa, temperature of 350 ℃ and 280V to obtain a high-temperature resistant inner coating(ii) a The second coating is performed in helium atmosphere and vacuum degree of 1.5 × 10-2Carrying out secondary coating under the conditions of Pa, 390 ℃ and 490V to obtain an epoxy outer coating; the third coating is in helium atmosphere and vacuum degree of 4.0X 10-2Pa, 480 ℃ and 250V to obtain the epoxy outer coating.
In addition, as shown in fig. 3 and 4, a special apparatus for stirring and heating the paint is used when mixing the high-temperature resistant undercoat layer and the epoxy overcoat layer, and the apparatus includes: storage device 50, storage device 50 is used for holding coating, storage device 50 includes agitator 51, the outage has been seted up to agitator 51's bottom, the external connection of outage has fluid-discharge tube 52, be connected with valve 53 on the fluid-discharge tube 52. The drain pipe 52 is used to discharge the diluted paint. The outside top of agitator is provided with conveyor 20, conveyor 20 includes feed liquor pipe 22, inside feed liquor pipe 22's one end stretched into agitator 51, the other end stretched out to agitator 51's top. The pump 23 is installed in the pipeline of the liquid inlet pipe 22, and the pump 23 can suck out the coating in the stirring barrel 51. The other end of the liquid inlet pipe 22 is connected with a heat exchange pipe 21, and the heat exchange pipe 21 is a spiral pipe. The other end of heat exchange tube 21 is connected with drain pipe 24, inside drain pipe 24's the other end stretched into agitator 51, drain pipe 24 was used for discharging the coating after the heating back to agitator 51 in. The outside of heat exchange tube 21 is provided with heating device 10, heating device 10 includes heating bucket 11, the one end of heat exchange tube 21 is introduced into from the top of heating bucket 11, and the other end is worn out from the opening part of heating bucket 11 below, heating pipe 21 and the welding of heating bucket 11 bottom. The heating tub 11 contains a liquid heating medium for conducting heat. The liquid inlet pipe 22 and the liquid outlet pipe 24 at both ends of the heat exchange pipe 21 are both positioned outside the heating barrel 11. The heating barrel 11 is internally provided with a heater 14 which is fixed on the barrel wall of the heating barrel 11 through a bracket, the heater 14 is an electric heater, and the heater 14 is used for providing heat.
When the coating needs to be diluted, the pump 23 is started, the pump 23 sucks the coating into the heat exchange tube 21 through the liquid inlet tube 22, and the heater 14 heats the liquid heating medium in the heating barrel 11, so that the heat exchange tube 21 soaked in the liquid heating medium is heated, the viscosity of the coating is reduced, and the fluidity is enhanced. The heat exchange tube 21 is spirally arranged, so that the contact area between the heat exchange tube 21 and a liquid heating medium can be increased, the heating time of the coating is prolonged, and the coating is heated more fully. The heated coating flows back to the mixing drum 51 through the outlet pipe 24 to be mixed with other coating in the mixing drum. The pump 23 continues to suck the dope into the heat exchange pipe 21 to be heated, and the above steps are repeated until the dope in the stirring barrel 51 reaches a predetermined viscosity. The device can replace the traditional method of adding the solvent into the coating to reduce the viscosity of the coating, save the cost of adding the solvent and avoid the pollution of the solvent to the environment.
Agitating unit 40 is installed to storage device 50's top, agitating unit 40 is arranged in stirring to the coating in agitator 51. The stirring device 40 includes: fixing base 41, fixing base 41 is the ring form, fixing base 41 is installed in the agitator 51 top, fixing base 41 and agitator 51's axis coincidence, fixing base 41 is connected through the bearing with agitator 51, fixing base 41 can rotate around self axis. The upper portion of the fixed seat 41 is connected with a gear ring 42 through a bolt, one side of the stirring barrel 51 is provided with a driving mechanism A44, the driving mechanism A44 is a motor, and the driving mechanism A44 is fixed on the rack. The driving mechanism a44 is arranged perpendicular to the ground and the driving shaft extends upwards. The driving end of the driving mechanism A44 is provided with a gear 43, and the gear 43 is meshed with the gear ring 42. And a driving mechanism B45 is mounted on the gear ring 42 by bolts, and the driving mechanism B45 is a motor. The drive mechanism B45 is disposed perpendicular to the ground and its drive shaft extends downwardly through an offset hole in the ring gear 42. The driving end of the driving mechanism B45 is connected with a stirring rod 47, and the driving mechanism B45 is connected with the stirring rod 47 through a coupler 46. The central axis of the stirring rod 47 is not coincident with the central axis of the gear ring 42, so that the stirring rod 47 can rotate around the central axis of the gear ring 42 while rotating around the central axis of the stirring rod, the stirring range of the stirring rod 47 is effectively enlarged, and the coating is stirred more fully. The stirring rod 47 extends into the stirring barrel 51 and extends from the upper part of the stirring barrel 51 to the bottom of the stirring barrel 51. The surface of the stirring rod 47 is uniformly provided with a plurality of blades 48 along the axial direction.
When the conveyor 20 just starts to suck the paint, the paint in the stirring barrel 51 is often easy to coagulate due to excessive viscosity, resulting in a situation that the liquid inlet pipe 22 is blocked. Therefore, before the pump 23 is started, the driving mechanism a44 and the driving mechanism a45 are firstly started, the stirring rod 47 and the blade 48 stir the paint, and the conveying device 20 is started to suck the paint after the paint condensation degree is reduced, so that the situation that the paint blocks the liquid inlet pipe 22 due to condensation when the conveying device 20 just starts to suck the paint is effectively avoided.
End connection that feed liquor pipe 22 and drain pipe 24 stretched into agitator 51 has telescoping device 30, telescoping device 30 can prolong the length that feed liquor pipe 22 and drain pipe 24 stretched into in agitator 51 to can adjust this length. The telescopic device 30 includes: the air cylinder A31 and the air cylinder B32 are fixed on the frame, and the air cylinder A31 and the air cylinder B32 are fixed on the frame. The end of a piston rod of the air cylinder A31 is connected with a connecting block A33, the end of a piston rod of the air cylinder B32 is connected with a connecting block B34, the connecting block A33 is connected with a barrel body A35, and the connecting block B34 is connected with a barrel body B36. The barrel body A35 and the barrel body B36 are both cylindrical barrel bodies, the inner diameter of the barrel body A35 is the same as the outer diameter of the liquid outlet pipe 24, and the inner diameter of the barrel body B36 is the same as the outer diameter of the liquid inlet pipe 22. The barrel body A35 is sleeved on the end part of the liquid outlet pipe 24 extending into the stirring barrel 51, and the barrel body B36 is sleeved on the end part of the liquid inlet pipe 22 extending into the stirring barrel 51. The pipe wall of the barrel body A35 is tightly matched with the pipe wall of the liquid outlet pipe 24 without a gap, and the pipe wall of the barrel body B36 is tightly matched with the pipe wall of the liquid inlet pipe 22 without a gap.
When the conveyor 20 sucks up the paint, the paint is sucked in through the inlet pipe 22 and discharged through the outlet pipe 24. At this time, the cylinder A31 and the cylinder B32 are started, so that the cylinder A31 drives the barrel body A35 to move up and down, and the cylinder B32 drives the barrel body B36 to move up and down, thereby constantly changing the depth of the suction position and the discharge position of the coating, and avoiding the problem of uneven dilution of the coating caused by the fact that the positions of the suction position and the discharge position of the coating are fixed every time. In addition, when the barrel body A35 retracts upwards, the barrel body B36 extends downwards, and when the barrel body B36 retracts upwards, the barrel body A35 extends downwards, so that the problem that the suction position and the discharge position of the coating are in a depth, the coating which is just discharged is sucked back immediately, and the same part of coating is repeatedly heated is solved, the coating is heated in a heating device, gaps among molecules are reduced, molecules in all raw materials are tightly combined, and the adhesion force of the inner layer coating and the outer layer coating is improved; the heat exchange tube is designed to be spiral, so that the contact area between the heat exchange tube and the liquid heating medium is increased, the heating time of the coating is prolonged, the coating is heated more sufficiently, and the stability of the coating is better enhanced.
And (3) performance testing:
boiling resistance detection
The experimental group used the products produced according to the methods of examples 1-4, placed in a high-temperature high-pressure closed container, and cooked with purified water at 121 ℃ for 30 minutes, without foaming, falling off, and significant discoloration, and deemed to be qualified in retort resistance, and the test results are shown in the following table.
Item Example 1 Example 2 Example 3 Example 4
Whether or not foaming occurs Whether or not Whether or not Whether or not Whether or not
Whether or not to fall off Whether or not Whether or not Whether or not Whether or not
Whether or not the color is obviously faded Whether or not Whether or not Whether or not Whether or not
As can be seen from the results of the steaming and boiling resistant experiment, the pull ring material prepared according to the invention has no phenomena of foaming, dropping and fading after being steamed and boiled for 30 minutes, and the product of the invention has excellent steaming and boiling resistant performance.
Secondly, measuring the adhesive force of the product
The adhesion test method generally adopts a grid cutting method (GB/T9286). When the multicoat layer was cut in a grid pattern and just penetrated the coating to the substrate, the resistance of the coating to separation from the substrate, or the ability of multicoat systems to resist separation from each other, was evaluated and the results were expressed as a scale.
Instrument and test materials: 6-blade cutting tools, transparent pressure-sensitive adhesive tapes and soft brushes.
The test steps are as follows: the template was placed on a hard, flat object and a vertical cut was made at 90 cross-cuts, with the cutter blade forming a grid pattern of regular intervals on the coating at a uniform force and rate. And lightly brushing the lattice with a soft brush in the diagonal direction for several times to remove paint chips. Placing the center point of the 75mm transparent pressure sensitive adhesive tape on the grid, the direction is parallel to a group of cutting lines, pressing the adhesive tape on the grid with fingers, rubbing the adhesive tape with finger tips to ensure good contact between the adhesive tape and the coating, and stripping the adhesive tape stably within 0.5-1.0s at an angle close to 60 degrees within 5 min.
(1) The experimental group used the broke materials prepared according to the invention in examples 1-4, and the 3 tested sites were randomly selected in comparison group i using a commercially available material of a brand claimed to be suitable for laser machining.
The rating method comprises the following steps: and under a good lighting environment, visually checking the shedding condition of the cutting surface coating. The adhesion criteria are shown in the following table:
Figure GDA0003182942180000141
the experimental results are as follows:
Figure GDA0003182942180000142
Figure GDA0003182942180000151
from the experimental data in the table above, it can be seen that the pull tab material prepared by the present invention has good adhesion among the layers, 3 randomly selected positions in examples 1-4 all have an adhesion rating of 0 or 1, i.e., the cut edge of the sample is very smooth, the grid edge does not fall off, or a small piece falls off at the intersection of the cut, the actual damage in the scribed area is 2%, while the adhesion rating in comparative group i is 3-4, when the sample is observed, a part of the sample is peeled off along the cut edge, a part of the grid is peeled off entirely, the peeled area is 33%, and the cut edge is peeled off largely, and the area reaches 58%.
(2) The experimental group used the pull-out materials prepared according to examples 1-4 of the present invention, and the comparative group ii (comparative example 1, comparative example 2, comparative example 3, comparative example 4) used the raw materials and methods corresponding to and consistent with those of examples 1-4, except that the conventional normal temperature coating method was used when coating the coil, the coating was not performed in a specific environment, the experiment was performed according to the above test method, and after the experiment was completed, the peel-off of the cut top coating was measured, and the experimental results are shown in the following table.
Figure GDA0003182942180000152
Figure GDA0003182942180000161
As can be seen from the above table, the cutting surface coatings of the ring material prepared according to the examples 1-4 have a smaller peeling area of 1% -3%, which indicates a higher adhesion between the coatings, while the coatings of the comparative group I have a more serious peeling condition of 58%, and from the experimental results of the comparative example, the conventional method is adopted during coating, the coating is not carried out in a specific environment, the peeling area of the coatings is obviously increased compared with the examples 1-4, and the peeling area ranges from 15% to 20%, which indicates that the method of the present invention is adopted, and the coatings are applied in an argon environment and a vacuum degree of 2.0 × 10-2～3.5×10-2Pa, temperature of 300-400 deg.C, 200-300V, lower metastable state energy level of argon, smaller first ionization energy at 2.0 × 10-2～3.5×10-2The properties of various raw materials in the high-temperature-resistant coating can be effectively protected from being damaged under the vacuum degree of Pa, the high-temperature-resistant coating is protected, and the components of the raw materials are prevented from being damaged due to overhigh ionization energy; in a helium environment during the second and third coating, the metastable energy level of high-energy metastable helium atoms of helium in a high-temperature environment is 11.7eV, metastable atoms or molecules with higher energy and longer service life can be generated, and the metastable particles can collide with other particles to release free electrons, so that the molecules in the raw materials can be more tightly connected, the leveling property is improved, and the bonding strength with an aluminum substrate and a high-temperature-resistant coating is enhanced.
Third, impact resistance detection of coating
The testing method of impact resistance of the coating is carried out according to GB/T1732-93, the equipment for testing impact performance is a precision TCJ-1200 elastic impact tester, the impact height is 50 +/-0.1 CM, the weight of a heavy hammer is 1000 +/-1 g, a steel ball on a punch head is required to meet the requirement of GB3088IV, the depth of the punch head entering a groove is 2 +/-0.1 m, and the testing conditions are carried out under the conditions of 23 +/-2 ℃ and 50% +/-5% relative humidity.
Detection standard: the test panel was inspected with a 4-fold magnifying glass, and it was judged that the paint film was acceptable in terms of cracks, wrinkles, and peeling, the test group used the pull-out materials prepared according to examples 1 to 4 of the present invention, and the comparative group used a commercially available material of a brand claimed to be suitable for laser processing, and the test results are shown in the following table.
Item Example 1 Example 2 Example 3 Example 4 Control group
Whether or not there is a crack Whether or not Whether or not Whether or not Whether or not Is that
Whether or not there is wrinkle Whether or not Whether or not Whether or not Whether or not Has slight wrinkles
Whether or not there is peeling Whether or not Whether or not Whether or not Whether or not Is that
As can be seen from the above table, when the tab materials of examples 1 to 4 were subjected to the impact resistance test, the coating layer had no cracks, wrinkles or peeling-off phenomenon, while the commercially available material had cracks, and the coating layer had peeling-off phenomenon, and the surface of the material had slight wrinkles, and it can be seen from the test results that the tab materials prepared by the present invention had strong adhesion.
Fourth, laser detection
(1) The product is placed under a laser machine, the two-dimensional code of the product is obtained by laser, the yield strength and the tensile strength of the aluminum base material around the two-dimensional code are detected, whether the characters are clear or not and whether the product has no peculiar smell or not are observed, and the results are shown in the following table. The initial yield strength of the aluminum substrate was 130MPa, and the initial tensile strength was 95 MPa.
Figure GDA0003182942180000171
Figure GDA0003182942180000181
From the above table, it can be seen that after laser processing, the aluminum-based tab material of the invention has almost no influence on the yield strength and tensile strength of the aluminum substrate, does not cause the reduction of the yield strength and tensile strength, has clear characters and no peculiar smell, while after laser processing, the yield strength of the commercially available tab material is reduced from 130MPa initially to 104MPa, and the tensile strength is reduced from 95MPa to 72MPa, and the tab material prepared by the invention has excellent performance compared with the commercially available common tab material.
(2) The experimental group in the experiment is the pull ring material prepared in the embodiment 1-4, and the raw materials and the method of the comparison group correspond to and are consistent with those of the embodiment 1-4, except that when the coating is coated, the temperatures of three heating zones of the oven A are all 180 ℃, the temperatures of three heating zones of the oven B are all 220 ℃, the product is placed under a laser machine, a two-dimensional code of the product is obtained by laser, and the yield strength and the tensile strength of the pull ring material are detected, and the results are shown in the following table.
Figure GDA0003182942180000182
From the above table, it can be seen that after the prepared tab material is subjected to laser treatment, the yield strength and the tensile strength of the tab material are both at a higher level, the yield strength can reach 385MPa at most, and the tensile strength can reach 205MPa at most, in the comparison group, because the temperature settings of three heating areas of the oven A and the oven B are the same when the coating is coated, the yield strength and the tensile strength are obviously reduced, which indicates that the temperature settings of the oven A and the oven B at different levels can meet the requirement of curing at a low temperature of an inner coating, and can avoid the problem of incomplete curing due to too low temperature, and simultaneously avoid the problem of too high curing speed due to too high temperature, so that the leveling property of the coating is lower, and the subsequent coating is not favorable for combination; in addition, because the aluminum base material can not bear twice high-temperature drying, three temperatures with different grades are adopted, the reduction of the yield strength and the tensile strength of the aluminum base material is favorably prevented, and the improvement of the mechanical property of the pull ring material is favorably realized.
It is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the inventive process concepts and solutions, or its application to other applications without modification.

Claims (7)

1. A preparation method of a pull ring material suitable for laser processing is characterized by comprising the following steps: the method comprises the following steps: continuously unreeling through an unreeling machine, conveying the aluminum substrate into a material storage machine, and then cleaning with alkali liquor prepared by mixing pure water and alkali; drying water by a dryer at the drying temperature of 80-90 ℃, cooling to 40 ℃, performing chromium passivation, coating a layer of passivation solution on the front and back surfaces of a material roll by using a roller, wherein the proportion of the adopted passivation solution is passivation stock solution: purified water =5:1, drying the water in the passivation solution by hot air in a curing furnace after passivation, wherein the drying temperature is 80-90 ℃, forming a passivation film, and cooling to 40 ℃; mixing the raw materials of the inner layer coating and the outer layer coating in proportion according to corresponding parts, then carrying out primary coating on the upper surface of the material roll by the material roll subjected to chromizing through a coating machine to obtain a high-temperature-resistant inner coating, carrying out coating on the lower surface of the material roll by the coating machine for the second time to obtain an epoxy outer coating, then drying through an oven A, and cooling to 40 ℃, wherein the temperatures of three heating zones of the oven A are 180 ℃, 220 ℃ and 200 ℃ respectively; coating the upper surface of the coil again by the coating machine for the third time to obtain an epoxy outer coating, drying by an oven B, cooling to 40 ℃, and obtaining the pull ring material suitable for laser processing, wherein the temperatures of three heating areas of the oven B are 220 ℃, 260 ℃ and 230 ℃ respectively;
when the material roll is coated for the first time, the material roll is coated in an argon environment under the vacuum degree of 2.0 multiplied by 10-2～3.5×10-2Carrying out primary coating under the conditions of Pa, the temperature of 300-400 ℃ and 200-300V to obtain a high-temperature-resistant inner coating; the second coating is performed in helium atmosphere and vacuum degree of 1.5 × 10-2～3.0×10-2Carrying out secondary coating under the conditions of Pa, 300-400 ℃ and 150-500V to obtain an epoxy outer coating; the third coating is in helium atmosphere and vacuum degree of 3.0 × 10-2～4.0×10-2Obtaining the epoxy outer coating under the conditions of Pa, the temperature of 400-500 ℃ and 200-300V.
2. The method of claim 1, wherein the method comprises the steps of: the high-temperature-resistant inner coating comprises the following raw materials in parts by weight: 40-50 parts of epoxy resin, 10-15 parts of amino resin, 1-5 parts of high-temperature-resistant organic pigment, 0-0.5 part of dispersing agent, 15-20 parts of aromatic hydrocarbon solvent, 10-15 parts of ethylene glycol monobutyl ether, 1-5 parts of n-butyl alcohol and 10-20 parts of propylene glycol monomethyl ether acetate.
3. The method of claim 1, wherein the method comprises the steps of: the epoxy outer coating comprises the following raw materials in parts by weight: 15-25 parts of ethylene glycol monobutyl ether, 5-10 parts of a dibasic ester mixture, 15-25 parts of propylene glycol monomethyl ether acetate, 1-5 parts of n-butyl alcohol, 15-20 parts of an aromatic hydrocarbon solvent, 0-0.1 part of formaldehyde and 3-8 parts of nano graphite powder.
4. The method of claim 1, wherein the method comprises the steps of: when the aluminum substrate is cleaned, the conductivity of the adopted water is less than 50s/m, the pH value of the alkali liquor is 9-11, and the temperature is controlled at 40-45 ℃.
5. The method of claim 1, wherein the method comprises the steps of: the passivation stock solution comprises the following raw materials in parts by weight: 0.1-1 part of hydrofluoric acid, 20-30 parts of nitric acid and 1-10 parts of trivalent chromium.
6. The method of claim 1, wherein the method comprises the steps of: when the material roll is coated, the rotating speed of a material carrying roller of the coating machine is 50r/min, the rotating speed of a metering roller is 60r/min, and the rotating speed of a coating roller is 75 r/min.
7. A laser-machinable tab stock made by the method of claim 1, comprising an aluminum substrate, wherein: the upper surface of the aluminum substrate is sequentially compounded with a high-temperature resistant inner coating and an epoxy outer coating; the lower surface of the aluminum substrate is compounded with an epoxy outer coating.
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CN1611306A (en) * 2003-10-31 2005-05-04 王天明 Laser coating process
CN102312539A (en) * 2011-08-16 2012-01-11 浙江墙煌建材有限公司 Clean water stone line painted aluminium plate and manufacturing process thereof
CN103073972A (en) * 2012-11-19 2013-05-01 山西中天新技术开发有限公司 Heatproof anticorrosion wear resistant powdery paint, preparation method and application
CN103394454A (en) * 2013-08-16 2013-11-20 中信戴卡股份有限公司 Color registering coating process for aluminium alloy wheel

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Publication number Priority date Publication date Assignee Title
CN1611306A (en) * 2003-10-31 2005-05-04 王天明 Laser coating process
CN102312539A (en) * 2011-08-16 2012-01-11 浙江墙煌建材有限公司 Clean water stone line painted aluminium plate and manufacturing process thereof
CN103073972A (en) * 2012-11-19 2013-05-01 山西中天新技术开发有限公司 Heatproof anticorrosion wear resistant powdery paint, preparation method and application
CN103394454A (en) * 2013-08-16 2013-11-20 中信戴卡股份有限公司 Color registering coating process for aluminium alloy wheel

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