CN107008634B - Water-based paint coating method and water-based paint for plastic shell of television receiver - Google Patents

Water-based paint coating method and water-based paint for plastic shell of television receiver Download PDF

Info

Publication number
CN107008634B
CN107008634B CN201710353456.XA CN201710353456A CN107008634B CN 107008634 B CN107008634 B CN 107008634B CN 201710353456 A CN201710353456 A CN 201710353456A CN 107008634 B CN107008634 B CN 107008634B
Authority
CN
China
Prior art keywords
parts
paint
coating
plastic shell
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710353456.XA
Other languages
Chinese (zh)
Other versions
CN107008634A (en
Inventor
陈旭松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DONGGUAN KONKA MOULD PLASTIC CO LTD
Shenzhen Jielunte Technology Co ltd
Dongguan Xutongda Mould Plastic Co ltd
Original Assignee
DONGGUAN KONKA MOULD PLASTIC CO LTD
Shenzhen Jielunte Technology Co ltd
Dongguan Xutongda Mould Plastic Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DONGGUAN KONKA MOULD PLASTIC CO LTD, Shenzhen Jielunte Technology Co ltd, Dongguan Xutongda Mould Plastic Co ltd filed Critical DONGGUAN KONKA MOULD PLASTIC CO LTD
Priority to CN201710353456.XA priority Critical patent/CN107008634B/en
Publication of CN107008634A publication Critical patent/CN107008634A/en
Application granted granted Critical
Publication of CN107008634B publication Critical patent/CN107008634B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B05D7/02—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 macromolecular substances, e.g. rubber
    • 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
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/045—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field on non-conductive substrates
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • 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
    • B05D7/576—Three layers or more the last layer being a clear coat each layer being cured, at least partially, separately
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/28—Glass
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances
    • 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
    • C09D133/00—Coating compositions 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • 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
    • C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • C09D161/12—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols with polyhydric phenols
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • 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
    • 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
    • C09D5/08—Anti-corrosive 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing 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
    • 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
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • 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
    • B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
    • B05D2401/20—Aqueous dispersion or solution
    • B05D2401/21—Mixture of organic solvent and water
    • 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
    • B05D2502/00—Acrylic polymers
    • 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
    • B05D2503/00—Polyurethanes
    • 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
    • B05D2518/00—Other type of polymers
    • 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
    • B05D2601/00—Inorganic fillers
    • B05D2601/02—Inorganic fillers used for pigmentation effect, e.g. metallic effect
    • 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
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/22—Silica
    • 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
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/24—Titanium dioxide, e.g. rutile
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses a coating method and a coating of a water-based coating of a television plastic shell workpiece, which adopts the coating with unique components, uniformly sprays the water-based coating on a plastic shell substrate by an electrostatic spraying method, is simple and convenient to operate, can directly use the existing mature electrostatic spraying equipment, adopts a three-time layered spraying and forced drying mode to obtain three layers of water-based coating coatings with different effects and complementary performance, and forms a uniform, flat and smooth composite paint film after thermosetting. The invention also provides three kinds of water-based paint for the television plastic shell workpiece, and the water-based paint can be widely used for plastic shell electrostatic spraying operation of plastic substrates such as ABS, PVC, PET and the like.

Description

Water-based paint coating method and water-based paint for plastic shell of television receiver
Technical Field
The invention relates to the technical field of water-based paint, in particular to a water-based paint coating method and a water-based paint for a television receiver plastic shell.
Background
Under the environment with high environmental protection requirements at present, the plastic paint continues to use the oil paint, besides low cost, mature process equipment and industrial habits, the plastic water paint has strict requirements on construction environment and process conditions, and meanwhile, domestic plastic water paint products, coating processes and equipment are not mature, and the advantages are not obvious compared with the advantages of the plastic paint, so that the large-area popularization and application of the plastic paint are limited.
The foreign plastic water paint has very strict requirements on construction environment, not only requires constant temperature and constant humidity operation environment, but also has very strict requirements on equipment and process using the plastic water paint. The following western developed countries have been provided with legal regulations for forbidding the use of oil paint, and have been used for popularizing the use of water paint comprehensively, so that enterprises in China must upgrade the technology and replace products and equipment as soon as possible to adapt to the policy change.
The development of the water-based paint starts from the stricter state of the national environmental protection laws and regulations, and more enterprises invest greater efforts to develop and research the water-based paint product when the technical superiority of the water-based paint is reflected along with the development of the product material. Along with the development of the technical capability of domestic material enterprises and the gradual pilot of the national environmental protection bureau of China for 'clean production', the establishment of 'national environmental protection friendly enterprises' is encouraged, and local governments also start to encourage the development of low-emission enterprise projects.
With the continuous development of domestic and foreign economy and the improvement of the living standard of people, consumers not only require more complete and more convenient functions for household appliances and daily products, but also put forward higher requirements for the health, environmental protection, appearance quality and decoration of the household appliances, and the household appliances are coated as the most main surface treatment means of the appearance surface of the household appliances, and meet unprecedented challenges while enjoying opportunities. People are paying more and more attention to health, environmental protection and the like, and behaviors and industries which harm and destroy living environment are supervised and reprimmed. The coating adopted by the household appliance industry, especially the coating on plastic parts, is mostly solvent-based at present, a large amount of VOC (volatile organic compounds) is discharged in the coating process, the pollution is caused to the surrounding living environment, the health and the safety of people are influenced, and the clean production is forcibly carried out on the pollution industry by relevant policies issued by the state.
At present, a plurality of challenges of a plastic part water-based paint coating product, equipment and a process in the household appliance industry mainly comprise a health challenge, an environment protection challenge, a new material challenge and a challenge of labor cost increase. And in the face of the challenge, if an effective solution way cannot be found in the coating of the water-based paint for plastic parts in the household appliance industry, the market sales of household appliance enterprises in China can be seriously influenced.
In the process of changing from oil resin to water resin in the coating industry, the cost may be increased due to raw material replacement, purchase of new equipment, and development and debugging, but the problem cannot be considered from the price point of view. The cost of the enterprise to use paint resins also includes: 1. the health cost, dizziness, eye prick, allergy, body lesion and even canceration generated by enterprise workers in the process of using the oleoresin are far more than those of the aqueous resin. 2. The traditional solvent-based resin contains a large amount of organic compounds VOC such as benzene, xylene, formaldehyde, free TDI (chemical raw materials of polyurethane paint) and the like, so that the traditional solvent-based resin not only consumes industrial raw materials such as petroleum and the like in production and use, but also volatilizes harmful gas, aggravates air pollution such as PM2.5 and the like, and has hidden danger of damaging human health. Compared with the water-based resin, the VOC emission of the water-based resin is about 1/10 of the emission of the traditional solvent-based paint, the environmental protection index is relatively higher, and for enterprises, pollution reduction and contribution to the emission of offspring and descendants are obligations and responsibilities to the greatest extent, and the improvement of the clean production capacity of the enterprises and the creation of environment-friendly and healthy products are guaranteed in the commercial and warfare manner in an undeniated way. 3. Safety cost, accident experience training changed by the cost of using blood once and again tells that safety is the life line of an enterprise, no safety exists, a large amount of solvent in the oleoresin is a high-risk source for causing fire and explosion, accidents which are difficult to bear and recover can be caused by slight carelessness of the enterprise in the production, transportation and use processes, and the threat of the fire and the explosion to the enterprise is greatly reduced by replacing the oleoresin with the water-based resin. The cost advantage of the water-based resin compared with the oil-based resin is self-evident by comprehensively considering various aspects such as price, health, environmental protection, safety and the like, and the water-based resin is an irreversible trend in the coating industry to replace the oil-based resin.
The difficult transformation of the oily resin into the water-based resin in enterprises does not only mean the increase of cost, but also needs to adopt mature products, equipment and processes to be matched with the oily resin to achieve the corresponding effect. However, at present, no water-based paint and coating process for the plastic shell of the television receiver, which are mature, have high cost performance and can take health, environmental protection, cost and other factors into consideration, are available.
Disclosure of Invention
One of the purposes of the invention is to provide a water-based paint coating method for a plastic shell of a broadcast television receiver, which is characterized in that water-based paint is uniformly sprayed on a plastic shell base material by an electrostatic spraying method, three water-based paint coatings with different effects and complementary performance matching are obtained by adopting a three-time layered spraying and forced drying mode, and a uniform, flat and smooth composite paint film is formed after thermocuring, and the water-based paint coating method has the advantages of strong adhesive force, good covering power, strong corrosion resistance, strong electromagnetic radiation absorption capability, good heat resistance, good weather resistance, full color, difficult pulverization and fading and the like.
The invention also aims to provide three coatings for coating the water-based coating of the plastic shell of the broadcast television receiver, and the three coatings adopt unique formulas, and after being respectively sprayed and thermally cured, the three coatings form a three-layer composite functional coating with overall matched performance and different effects, thereby achieving the effects of health, environmental protection, safety, low cost and the like.
In order to achieve the purpose, the invention provides the technical scheme that:
a coating method of water-based paint for a television plastic shell workpiece is characterized by comprising the following steps:
(1) preprocessing a television plastic shell workpiece to be processed, processing and cutting, and placing a product on a car rack or a production line conveying hanger penetrating through an electrostatic spraying chamber and a tunnel furnace;
(2) surface cleaning: wiping the surface of the plastic shell to clean, and removing water, stains and foreign matters on the surface of the product;
(3) electrostatic dust removal: the product which is loaded on the luggage carrier or the hanger is subjected to online static electricity removing operation, so that static electricity of the plastic shell workpiece is removed, namely positive charge of the plastic shell workpiece is removed;
(4) one coating and one baking to form an electromagnetic wave absorbing and light absorbing primer layer: the black primer coating which is specially configured and contains the electromagnetic wave absorption nano micro beads is quantitatively, uniformly and continuously sprayed on the plastic shell workpiece, and the coating forms a uniform and continuous primer coating on the surface of the plastic shell workpiece in a forced drying mode through a tunnel furnace, wherein the coating is used for realizing the effects of the plastic shell workpiece on absorbing electromagnetic waves inwards and absorbing all light outwards;
(5) coating and baking the second time to form a reflecting electromagnetic wave and coloring a middle paint layer: quantitatively, uniformly and continuously spraying a specially configured Chinese paint coating containing a nano flaky body for reflecting electromagnetic waves and a specific color on a plastic shell workpiece, and forming a uniform and continuous Chinese paint coating on the surface of the plastic shell workpiece in a forced drying mode by using a tunnel furnace to realize the required effect of reflecting external electromagnetic waves and setting the color on the plastic shell workpiece;
(6) and (3) coating and baking three times to form a protective and high-gloss finish paint layer: the specially prepared transparent finish paint is quantitatively, uniformly and continuously sprayed on the plastic shell workpiece, and the paint forms a uniform and continuous coating on the surface of the plastic shell workpiece in a forced drying mode, so that the adhesive force and the glossiness of the coating are enhanced;
(7) and (3) natural cooling: and naturally cooling the plastic shell workpiece to normal temperature to obtain a finished product.
Step (4), further comprising the following steps:
(41) preparing water-based primer coating crude oil for absorbing waves and light;
(42) diluting and blending: according to the primer: deionized water = 9: 1, diluting the primer, and uniformly stirring, wherein the viscosity is controlled to be 8.5-11 Pa.s (rock NK-2 viscosity cup, normal temperature and normal pressure); the glass beads also have the function of a lubricant;
(43) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared primer coating, wherein the temperature of a preheating section is set to be 20-35 ℃, and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(44) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, selecting an absorption type or a gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure of the spray gun is 0.4-0.5MPa, and the air pressure of the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(45) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 0.8-1.2M/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(451) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous primer coating with uniform thickness;
(452) and (3) entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the dried shell from the tunnel furnace to finish one-coating one-baking to form a paint film with the thickness of about 5-6 microns.
Step (41) preparation of the primer coating crude oil, further comprising the following steps:
(411) weighing the following raw material components: weighing the following components in parts by weight: 50-60 parts of urushiol formaldehyde polycondensate emulsion, 10-20 parts of urushiol base emulsifier, 5-10 parts of nickel-plated nano hollow glass beads, 20-40 parts of white cement, 2-5 parts of carbon black, 2-5 parts of isocyanate curing agent, 5-10 parts of propylene glycol methyl ether, 0.2-0.5 part of pH regulator and 50-70 parts of deionized water; wherein, the white cement can adopt one of 325# 425# and 525# white cement;
(412) stirring at a low speed: adding isocyanate curing agent, propylene glycol methyl ether and 0.2-0.5 part of PH regulator into a stirrer in turn, stirring for 5-10 minutes at 500-600 rpm, and stirring until the mixture is uniform and transparent and is dissolved in deionized water;
(413) and (3) stirring at medium speed: sequentially adding the urushiol formaldehyde polycondensate emulsion, the urushiol-based emulsifier, the white cement and the carbon black into a stirrer, and stirring for 5-10 minutes at 800-1000 r/min;
(414) high-speed stirring: adding the nickel-plated nano hollow glass microspheres into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm to uniformly stir the nickel-plated nano hollow glass microspheres;
(415) and pouring the stirred raw materials into a coating bucket to prepare the primer coating crude oil.
Step (5), further comprising the following steps:
(51) preparing water-based Chinese paint coating crude oil for reflecting electromagnetic waves and coloring;
(52) diluting and blending: according to the raw oil of the Chinese paint coating: deionized water = 10: 1, diluting the primer, and uniformly stirring, wherein the viscosity is controlled to be 8.5-11 Pa.s (rock NK-2 viscosity cup, normal temperature and normal pressure);
(53) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared paint, wherein the temperature of a preheating section is set to be 20-35 ℃ and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(54) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, selecting an absorption type or a gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure of the spray gun is 0.4-0.5MPa, and the air pressure of the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(55) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 0.8-1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(551) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous and uniform-thickness intermediate paint coating;
(552) and (3) entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the dried shell out of the tunnel furnace to finish secondary coating and secondary baking to form a paint film with the thickness of about 3-4 microns.
The preparation of the crude oil of the paint coating in the step (51) further comprises the following steps:
(511) weighing the following raw material components: weighing the following components in parts by weight: 20-30 parts of waterborne polyurethane resin, 10-20 parts of waterborne acrylic resin, 5-15 parts of titanium dioxide, 2-5 parts of inorganic pigment, 5-10 parts of nano nickel-plated graphite micro-sheet, 2-5 parts of waterborne zinc stearate, 5-10 parts of sodium hexametaphosphate, 5-10 parts of wax powder, 1-5 parts of calcium carbonate, 0.2-1 part of pH regulator and 50-70 parts of deionized water; wherein, the titanium dioxide can be selected from rutile type titanium dioxide and/or anatase type titanium dioxide;
(512) stirring at a low speed: sequentially adding water-based zinc stearate, sodium hexametaphosphate, a pH regulator, inorganic pigment and deionized water into a stirrer, and stirring for 5-10 minutes at 500-600 revolutions per minute to uniformly dissolve the water-based zinc stearate, the sodium hexametaphosphate, the pH regulator and the inorganic pigment in water;
(513) and (3) stirring at medium speed: sequentially adding the waterborne polyurethane resin, the waterborne acrylic emulsion, the titanium dioxide, the wax powder and the calcium carbonate into a stirrer, and stirring for 5-10 minutes at the speed of 800-;
(514) high-speed stirring: adding the nano nickel-plated graphite micro-sheet into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm;
(515) and pouring the stirred raw materials into a coating bucket to prepare the Chinese paint crude oil.
The step (6) further comprises the following steps:
(61) preparing transparent and high-brightness finish paint crude oil;
(62) diluting and blending: according to the finish paint crude oil: deionized water = 10: 1.5, diluting the face paint, and uniformly stirring, wherein the viscosity is controlled to be 8-11 Pa.s (rock NK-2 viscosity cup, normal temperature and normal pressure);
(63) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared paint, wherein the temperature of a preheating section is set to be 20-35 ℃ and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(64) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, preferably 60-75% RH, selecting an absorption type or gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure in the spray gun is 0.4-0.5MPa, and the air pressure in the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(65) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 0.8-1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(651) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous finish paint coating with uniform thickness;
(652) and (3) entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the dried shell out of the tunnel furnace to finish three-coating and three-baking to form a paint film with the thickness of about 4-5 microns.
The preparation of the crude oil of the finish paint in the step (61) further comprises the following steps:
(611) weighing the following raw material components: weighing the following components in parts by weight: 30-40 parts of styrene-acrylic emulsion, 45-55 parts of acrylic emulsion, 2-5 parts of adhesion promoter, 1-3 parts of flatting agent, 1-5 parts of filler, 0.5-2 parts of surfactant, 0.2-0.8 part of defoaming agent and 0.1-1 part of thickening agent; 0.5-1 part of antioxidant and 50-90 parts of water;
(612) stirring at a low speed: sequentially adding the adhesion promoter, the flatting agent, the surfactant, the defoaming agent, the thickening agent, the antioxidant and the deionized water into a stirring machine, and stirring for 5-10 minutes at the speed of 500 plus 600 revolutions per minute to uniformly dissolve the materials in water;
(613) and (3) stirring at medium speed: sequentially adding 30-40 parts of styrene-acrylic emulsion and acrylic emulsion into a stirrer, and stirring for 5-10 minutes at 800-;
(614) high-speed stirring: adding the filler into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm;
(615) and pouring the stirred raw materials into a coating bucket to prepare the finish coating crude oil.
The water-based paint for the television plastic shell workpiece for implementing the coating method is characterized in that the primer paint crude oil is prepared from the following raw material components in parts by weight: 50-60 parts of urushiol formaldehyde polycondensate emulsion, 10-20 parts of urushiol base emulsifier, 5-10 parts of nickel-plated nano hollow glass beads, 20-40 parts of white cement, 2-5 parts of carbon black, 2-5 parts of isocyanate curing agent, 5-10 parts of propylene glycol methyl ether, 0.2-0.5 part of pH regulator and 50-70 parts of deionized water.
The Chinese lacquer coating crude oil is prepared from the following raw materials in parts by weight: 20-30 parts of waterborne polyurethane resin, 10-20 parts of waterborne acrylic resin, 5-15 parts of titanium dioxide, 2-5 parts of inorganic pigment, 5-10 parts of nano nickel-plated graphite micro-sheet, 2-5 parts of waterborne zinc stearate, 5-10 parts of sodium hexametaphosphate, 5-10 parts of wax powder, 1-5 parts of calcium carbonate, 0.2-1 part of pH regulator and 50-70 parts of deionized water.
The finish paint crude oil is prepared from the following raw materials in parts by weight: 30-40 parts of styrene-acrylic emulsion, 45-55 parts of acrylic emulsion, 2-5 parts of adhesion promoter, 1-3 parts of flatting agent, 1-5 parts of filler, 0.5-2 parts of surfactant, 0.2-0.8 part of defoaming agent and 0.1-1 part of thickening agent; 0.5-1 part of antioxidant and 50-90 parts of water.
The invention has the following beneficial effects:
1. the electrostatic spraying method provided by the invention combines the paint with unique components, the water-based paint is uniformly sprayed on the plastic shell base material by the electrostatic spraying method, the operation is simple and convenient, the existing mature electrostatic spraying equipment can be directly used, three-time layered spraying and forced drying modes are adopted, three layers of water-based paint coatings with different effects and complementary performance matching are obtained, and a uniform, flat and smooth composite paint film is formed after thermocuring.
2. The three coatings with different components and functions are used for coating the plastic shell of the broadcast television receiver, and a unique formula is adopted, and after the coatings are respectively sprayed and thermally cured, the three coatings form a three-layer composite functional coating with overall matched performance and different effects, so that the effects of health, environmental protection, safety, low cost and the like are achieved; the comprehensive technical effect and performance which can not be achieved by adopting the same coating on the bottom and the surface and spraying twice are achieved. The three coatings are respectively prepared and sprayed, so that the color and the dosage of the intermediate coating are only required to be adjusted according to the required color, the primer and the finish are not required to be adjusted, and the coating loss is reduced.
3. The invention can be widely applied to the electrostatic spraying operation of plastic shells of various household appliances and electrical products of plastic substrates such as ABS, PVC, PET, PE, BOPP and the like, and plastic shells with various complex structures, the obtained coating after thermosetting is uniform, and the invention has the characteristics of health (electromagnetic radiation absorption), environmental protection (no VOC generation), heat resistance, brightness, high drying speed, overlapping resistance, good printing property, good water resistance, full and gorgeous color and the like, and has mature equipment and process and lower comprehensive cost of the coating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment provides a coating method of a water-based paint for a television plastic shell workpiece, which comprises the following steps:
(1) preprocessing a television plastic shell workpiece to be processed, processing and cutting, and placing a product on a car rack or a production line conveying hanger penetrating through an electrostatic spraying chamber and a tunnel furnace;
(2) surface cleaning: wiping the surface of the plastic shell to clean, and removing water, stains and foreign matters on the surface of the product;
(3) electrostatic dust removal: the product which is loaded on the luggage carrier or the hanging bracket is subjected to online static electricity removing operation to remove static electricity of the plastic shell workpiece, namely positive charge of the plastic shell workpiece is removed, manual static electricity dust removal is firstly adopted, and then automatic static electricity dust removal is adopted;
(4) one coating and one baking to form an electromagnetic wave absorbing and light absorbing primer layer: the black primer coating which is specially configured and contains the electromagnetic wave absorption nano micro beads is quantitatively, uniformly and continuously sprayed on the plastic shell workpiece, and the coating forms a uniform and continuous primer coating on the surface of the plastic shell workpiece in a forced drying mode through a tunnel furnace, wherein the coating is used for realizing the effects of the plastic shell workpiece on absorbing electromagnetic waves inwards and absorbing all light outwards;
(5) coating and baking the second time to form a reflecting electromagnetic wave and coloring a middle paint layer: quantitatively, uniformly and continuously spraying a specially configured Chinese paint coating containing a nano flaky body for reflecting electromagnetic waves and a specific color on a plastic shell workpiece, and forming a uniform and continuous Chinese paint coating on the surface of the plastic shell workpiece in a forced drying mode by using a tunnel furnace to realize the required effect of reflecting external electromagnetic waves and setting the color on the plastic shell workpiece;
(6) and (3) coating and baking three times to form a protective and high-gloss finish paint layer: the specially prepared transparent finish paint is quantitatively, uniformly and continuously sprayed on the plastic shell workpiece, and the paint forms a uniform and continuous coating on the surface of the plastic shell workpiece in a forced drying mode, so that the adhesive force and the glossiness of the coating are enhanced.
(7) And (3) natural cooling: and naturally cooling the plastic shell workpiece to normal temperature to obtain a finished product.
The step (4) further comprises the following steps:
(41) preparing water-based primer coating crude oil for absorbing waves and light;
(42) diluting and blending: according to the primer: deionized water = 9: 1, diluting the primer, and uniformly stirring, wherein the viscosity is controlled to be 8.5-11 Pa.s (rock NK-2 viscosity cup, normal temperature and normal pressure); the glass beads have the functions of absorbing electromagnetic waves and physical lubricants and also have the function of absorbing light;
(43) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared primer coating, wherein the temperature of a preheating section is set to be 20-35 ℃, and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(44) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, selecting an absorption type spray gun to obtain good supply atomization conditions, wherein the gun inlet air pressure is 0.4-0.5MPa, and the gun opening air pressure is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(45) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 0.8-1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(451) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous primer coating with uniform thickness;
(452) and (3) entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the dried shell out of the tunnel furnace to finish one-coating one-baking, wherein the thickness of a formed paint film is about 5-6 microns.
The step (5) further comprises the following steps:
(51) preparing water-based Chinese paint coating crude oil for reflecting electromagnetic waves and coloring;
(52) diluting and blending: according to the raw oil of the Chinese paint coating: deionized water = 10: 1, diluting the primer, and uniformly stirring, wherein the viscosity is controlled to be 8.5-11 Pa.s (rock NK-2 viscosity cup, normal temperature and normal pressure);
(53) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared paint, wherein the temperature of a preheating section is set to be 20-35 ℃ and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(54) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, preferably 60-75% RH, selecting an absorption type or gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure in the spray gun is 0.4-0.5MPa, and the air pressure in the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(55) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(551) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous and uniform-thickness intermediate paint coating;
(552) and (3) entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the dried shell out of the tunnel furnace to finish secondary coating and secondary baking to form a paint film with the thickness of about 3-4 microns.
The step (6) further comprises the following steps:
(61) preparing transparent and high-brightness finish paint crude oil;
(62) diluting and blending: according to the finish paint crude oil: deionized water = 10: 1.5, diluting the face paint, and uniformly stirring, wherein the viscosity is controlled to be 8-11 Pa.s (rock NK-2 viscosity cup, normal temperature and normal pressure);
(63) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared paint, wherein the temperature of a preheating section is set to be 20-35 ℃ and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(64) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, preferably 60-75% RH, selecting an absorption type or gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure in the spray gun is 0.4-0.5MPa, and the air pressure in the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(65) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(651) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous finish paint coating with uniform thickness; (652) and (3) entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the dried shell out of the tunnel furnace to finish three-coating and three-baking to form a paint film with the thickness of about 4-5 microns.
In the water-based paint for the television plastic shell workpiece for implementing the coating method provided by the embodiment, the primer paint crude oil is prepared from the following raw material components in parts by weight: 50-60 parts of urushiol formaldehyde polycondensate emulsion, 10-20 parts of urushiol base emulsifier, 5-10 parts of nickel-plated nano hollow glass beads, 20-40 parts of white cement, 2-5 parts of carbon black, 2-5 parts of isocyanate curing agent, 5-10 parts of propylene glycol methyl ether, 0.2-0.5 part of pH regulator and 50-70 parts of deionized water, wherein the preparation method comprises the following steps:
step (41) preparation of the primer coating crude oil, further comprising the following steps:
(411) weighing the following raw material components: weighing the following components in parts by weight: 50-60 parts of urushiol formaldehyde polycondensate emulsion, 10-20 parts of urushiol base emulsifier, 5-10 parts of nickel-plated nano hollow glass beads, 20-40 parts of white cement, 2-5 parts of carbon black, 2-5 parts of isocyanate curing agent, 5-10 parts of propylene glycol methyl ether, 0.2-0.5 part of pH regulator and 50-70 parts of deionized water; wherein, the white cement can adopt one of 325# 425# and 525# white cement; 325# is used in this embodiment;
(412) stirring at a low speed: adding isocyanate curing agent, propylene glycol methyl ether and 0.2-0.5 part of pH regulator into a stirrer in turn, stirring for 5-10 minutes at 500-600 rpm, and stirring until the mixture is uniform and transparent and is dissolved in deionized water;
(413) and (3) stirring at medium speed: sequentially adding the urushiol formaldehyde polycondensate emulsion, the urushiol-based emulsifier, the white cement and the carbon black into a stirrer, and stirring for 5-10 minutes at 800-1000 r/min;
(414) high-speed stirring: adding the nickel-plated nano hollow glass microspheres into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm to uniformly stir the nickel-plated nano hollow glass microspheres;
(415) and pouring the stirred raw materials into a coating bucket to prepare the primer coating crude oil.
The Chinese lacquer coating crude oil is prepared from the following raw materials in parts by weight: 20-30 parts of waterborne polyurethane resin, 10-20 parts of waterborne acrylic resin, 5-15 parts of titanium dioxide, 2-5 parts of inorganic pigment, 5-10 parts of nano nickel-plated graphite micro-sheet, 2-5 parts of waterborne zinc stearate, 5-10 parts of sodium hexametaphosphate, 5-10 parts of wax powder, 1-5 parts of calcium carbonate, 0.2-1 part of pH regulator and 50-70 parts of deionized water.
The preparation of the crude oil of the paint coating in the step (51) further comprises the following steps:
(511) weighing the following raw material components: weighing the following components in parts by weight: 20-30 parts of waterborne polyurethane resin, 10-20 parts of waterborne acrylic resin, 5-15 parts of titanium dioxide, 2-5 parts of inorganic pigment, 5-10 parts of nano nickel-plated graphite micro-sheet, 2-5 parts of waterborne zinc stearate, 5-10 parts of sodium hexametaphosphate, 5-10 parts of wax powder, 1-5 parts of calcium carbonate, 0.2-1 part of pH regulator and 50-70 parts of deionized water; wherein, the titanium dioxide can be selected from rutile type titanium dioxide and/or anatase type titanium dioxide;
(512) stirring at a low speed: sequentially adding water-based zinc stearate, sodium hexametaphosphate, a pH regulator, inorganic pigment and deionized water into a stirrer, and stirring for 5-10 minutes at 500-600 revolutions per minute to uniformly dissolve the water-based zinc stearate, the sodium hexametaphosphate, the pH regulator and the inorganic pigment in water;
(513) and (3) stirring at medium speed: sequentially adding the waterborne polyurethane resin, the waterborne acrylic emulsion, the titanium pigment, the wax powder and the calcium carbonate into a stirrer, and stirring for 5-10 minutes at the speed of 800-;
(514) high-speed stirring: adding the nano nickel-plated graphite micro-sheet into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm;
(515) and pouring the stirred raw materials into a coating bucket to prepare the Chinese paint crude oil.
The finish paint crude oil is prepared from the following raw materials in parts by weight: 30-40 parts of styrene-acrylic emulsion, 45-55 parts of acrylic emulsion, 2-5 parts of adhesion promoter, 1-3 parts of flatting agent, 1-5 parts of filler, 0.5-2 parts of surfactant, 0.2-0.8 part of defoaming agent and 0.1-1 part of thickening agent; 0.5-1 part of antioxidant and 50-90 parts of water.
The preparation of the crude oil of the finish paint in the step (61) further comprises the following steps:
(611) weighing the following raw material components: weighing the following components in parts by weight: 30-40 parts of styrene-acrylic emulsion, 45-55 parts of acrylic emulsion, 2-5 parts of adhesion promoter, 1-3 parts of flatting agent, 1-5 parts of filler, 0.5-2 parts of surfactant, 0.2-0.8 part of defoaming agent and 0.1-1 part of thickening agent; 0.5-1 part of antioxidant and 50-90 parts of water;
(612) stirring at a low speed: sequentially adding the adhesion promoter, the flatting agent, the surfactant, the defoaming agent, the thickening agent, the antioxidant and the deionized water into a stirring machine, and stirring for 5-10 minutes at the speed of 500 plus 600 revolutions per minute to uniformly dissolve the materials in water;
(613) and (3) stirring at medium speed: sequentially adding 30-40 parts of styrene-acrylic emulsion and acrylic emulsion into a stirrer, and stirring for 5-10 minutes at 800-;
(614) high-speed stirring: adding the filler into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm;
(615) and pouring the stirred raw materials into a coating bucket to prepare the finish coating crude oil.
In this embodiment, the manual electrostatic dust removal in step (3) is performed on the plastic casing for 5 to 6 seconds by using a manual electrostatic dust removal gun, and the motion follows the contour track of the perimeter of the product. So as to eliminate the static electricity generated during the transferring and cleaning processes of the plastic shell and remove the foreign matters remained on the plastic shell, so that the plastic shell is charged with the static electricity within the range of 0-0.6KV, and finally the plastic shell is conveyed to the conveying area through the spraying production line. The automatic electrostatic dust removal is to carry out 3-4 seconds of electrostatic dust removal action on the plastic shell piece on the feeding line through an automatic electrostatic removal ion air nozzle of the feeding conveying line, and further remove invisible dust particles remained on the plastic shell piece and eliminate static electricity. The plastic shell is charged with static electricity within the range of 0-0.6KV, and finally the plastic shell is conveyed to a spray room staticizing area through a spray production line.
The equipment and main process requirements adopted by the electrostatic dust collection in the step (3) are as follows:
the manual electrostatic dust removal process requires:
the model of the electrostatic generator is as follows: HA-4
Electrostatic generator voltage: 4KV
The model of the electrostatic gun: HBA (1 static generator with 2 static gun)
Electrostatic dust collection time of each plastic shell: 1-2 seconds
Model of the static tester: FMX-003
The plastic shell workpiece is electrostatically charged by 0.4-0.9KV before manual electrostatic dust removal
The plastic shell workpiece is electrostatically charged by 0-0.06KV after manual electrostatic dust removal
The process requirements for automatic electrostatic dust removal are as follows:
number of types of electrostatic generators: HA-4, 4 in total
Electrostatic generator voltage: 4KV
Model and number of electrostatic dust removal air nozzles: HS, 12 in number (1 electrostatic generator with 4 electrostatic nozzles)
The electrostatic dust removal time of each surface or area on each plastic shell workpiece is 1.5-2 seconds
The plastic shell workpiece is electrostatically charged by 0.4-0.9KV before automatic electrostatic dust collection
The plastic shell workpiece is electrostatically charged by 0-0.06KV after automatic electrostatic dust collection
In this embodiment, the basic environmental conditions of each spraying process are as follows:
serial number Item Process requirements
1 Temperature and time of preheating section 40-45℃ 6-10min
2 Temperature and time of baking section 60-75℃
3 Temperature of spray room 10-40℃
4 Humidity of spray room 20-90% RH, preferably 60% -75% RH
5 Drying line conveying speed 0.8-1.2 m/min
Example 2:
the method for coating the water-based paint for the television plastic shell workpiece and the paint provided by the embodiment are basically the same as those in the embodiment 1, and the difference is that:
the step (44) of electrostatic spraying: the temperature setting range of the spray booth is 30-40 ℃, the humidity is 60% -75% RH, the gravity type spray gun is selected to obtain good supply atomization conditions, the air pressure of the spray gun is 0.4-0.5MPa, and the air pressure of the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
the preparation of the primer coating crude oil in the step (411) comprises the following steps of weighing raw material components: weighing the following components in parts by weight: 50 parts of urushiol formaldehyde polycondensate emulsion, 20 parts of urushiol-based emulsifier, 8 parts of nickel-plated nano hollow glass beads, 30 parts of white cement, 2 parts of carbon black, 2 parts of isocyanate curing agent, 5 parts of propylene glycol methyl ether, 0.2 part of pH regulator and 60 parts of deionized water; wherein, the white cement adopts 425 #.
The preparation of the crude oil of the paint coating in the step (511) comprises the following steps: weighing the following components in parts by weight: 25 parts of waterborne polyurethane resin, 10 parts of waterborne acrylic resin, 10 parts of titanium dioxide, 4 parts of inorganic pigment, 8 parts of nano nickel-plated graphite micro-sheet, 4 parts of waterborne zinc stearate, 8 parts of sodium hexametaphosphate, 6 parts of wax powder, 2 parts of calcium carbonate, 1 part of pH regulator and 60 parts of deionized water; wherein, the titanium dioxide adopts rutile type titanium dioxide.
The preparation of the crude oil of the finish paint in the step (611) comprises the following steps: weighing the following components in parts by weight: 30 parts of styrene-acrylic emulsion, 50 parts of acrylic emulsion, 4 parts of adhesion promoter, 2 parts of flatting agent, 4 parts of filler, 1 part of surfactant, 0.6 part of defoaming agent and 0.1 part of thickening agent; 0.8 part of antioxidant and 60 parts of water.
Example 3:
the method for coating the water-based paint for the television plastic shell workpiece and the paint provided by the embodiment are basically the same as the embodiments 1 and 2, and the difference is that:
preparing the base paint coating crude oil in the step (411), weighing the raw material components: weighing the following components in parts by weight: 50 parts of urushiol formaldehyde polycondensate emulsion, 20 parts of urushiol-based emulsifier, 8 parts of nickel-plated nano hollow glass beads, 30 parts of white cement, 2 parts of carbon black, 2 parts of isocyanate curing agent, 5 parts of propylene glycol methyl ether, 0.2 part of pH regulator and 60 parts of deionized water; wherein, the white cement adopts 525 #.
Preparing the raw oil of the Chinese paint coating in the step (511), weighing the raw material components: weighing the following components in parts by weight: 20 parts of waterborne polyurethane resin, 20 parts of waterborne acrylic resin, 5 parts of titanium dioxide, 2 parts of inorganic pigment, 5 parts of nano nickel-plated metal aluminum sheet, 2 parts of waterborne zinc stearate, 5 parts of sodium hexametaphosphate, 10 parts of wax powder, 1 part of calcium carbonate, 0.2 part of pH regulator and 50 parts of deionized water; wherein, the titanium dioxide adopts anatase titanium dioxide.
The preparation of the crude oil of the finish paint in the step (611) comprises the following steps: weighing the following components in parts by weight: 40 parts of styrene-acrylic emulsion, 45 parts of acrylic emulsion, 2 parts of adhesion promoter, 1 part of flatting agent, 1 part of filler, 0.5 part of surfactant, 0.2 part of defoaming agent and 0.5 part of thickening agent; 0.5 part of antioxidant and 80 parts of water.
Example 4:
the method for coating the water-based paint for the television plastic shell workpiece and the paint provided by the embodiment are basically the same as the method and the paint provided by the embodiments 1, 2 and 3, and the difference is that:
step (411) preparation of the primer coating crude oil, weighing the raw material components: weighing the following components in parts by weight: 60 parts of urushiol formaldehyde polycondensate emulsion, 10 parts of urushiol-based emulsifier, 10 parts of nickel-plated nano hollow glass beads, 40 parts of white cement, 5 parts of carbon black, 5 parts of isocyanate curing agent, 8 parts of propylene glycol methyl ether, 0.4 part of PH regulator and 50 parts of deionized water; wherein, the white cement adopts 325 #.
The preparation of the crude oil of the paint coating in the step (511) comprises the following steps: weighing the following components in parts by weight: 30 parts of waterborne polyurethane resin, 15 parts of waterborne acrylic resin, 15 parts of titanium dioxide, 5 parts of inorganic pigment, 10 parts of nano nickel-plated metal copper sheet, 5 parts of waterborne zinc stearate, 10 parts of sodium hexametaphosphate, 5 parts of wax powder, 5 parts of calcium carbonate, 0.8 part of pH regulator and 70 parts of deionized water; wherein, the titanium dioxide is a mixture of anatase titanium dioxide and rutile titanium dioxide, and the two titanium dioxide respectively account for 50 percent.
The preparation of the crude oil of the finish paint in the step (611) comprises the following steps: weighing the following components in parts by weight: 40 parts of styrene-acrylic emulsion, 45 parts of acrylic emulsion, 2 parts of adhesion promoter, 1 part of flatting agent, 1 part of filler, 0.5 part of surfactant, 0.2 part of defoaming agent and 0.5 part of thickening agent; 0.5 part of antioxidant and 80 parts of water.
The nickel-plated nano hollow glass microspheres adopted in the embodiments of the invention have the particle size of 10-250 μm and the wall thickness of 1-2 μm, and have the advantages of light weight, low heat conduction, higher strength, good chemical stability and the like. The nickel-plated nano hollow glass beads have excellent performance of absorbing electromagnetic radiation, can absorb electromagnetic waves generated when components inside a television set work, and avoid electromagnetic interference on the inside and the outside of the television set; the carbon black is arranged in a primer film and is matched with carbon black, so that the primer can better absorb external light, and the color of the primer is more full.
The diameter of the nano nickel-plated graphite microchip, the metal copper sheet and the metal aluminum sheet adopted in each embodiment of the invention is within the range of 5-20 mu m, the thickness is about 30-80 nm, and compared with the conventional graphite flake or metal sheet, the reflection effect of the nano nickel-plated graphite microchip, the metal copper sheet and the metal aluminum sheet on external high-frequency electromagnetic waves is better.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A coating method of water-based paint for a television plastic shell workpiece is characterized by comprising the following steps:
(1) preprocessing a television plastic shell workpiece to be processed, processing and cutting, and placing a product on a car rack or a production line conveying hanger penetrating through an electrostatic spraying chamber and a tunnel furnace;
(2) surface cleaning: wiping the surface of the plastic shell to clean, and removing water, stains and foreign matters on the surface of the product;
(3) electrostatic dust removal: the product which is loaded on the luggage carrier or the hanger is subjected to online static electricity removing operation, so that static electricity of the plastic shell workpiece is removed, namely positive charge of the plastic shell workpiece is removed;
(4) one coating and one baking to form an electromagnetic wave absorbing and light absorbing primer layer: quantitatively, uniformly and continuously spraying primer paint which is specially configured and contains electromagnetic wave absorption nano microbeads on a plastic shell workpiece, and enabling the paint to form a uniform and continuous primer paint coating on the surface of the plastic shell workpiece in a forced drying mode of a tunnel furnace, wherein the primer paint coating is used for realizing the effects of the plastic shell workpiece on absorbing electromagnetic waves inwards and absorbing all light outwards;
the crude oil of the primer coating is prepared from the following raw materials in parts by weight: 50-60 parts of urushiol formaldehyde polycondensate emulsion, 10-20 parts of urushiol base emulsifier, 5-10 parts of nickel-plated nano hollow glass beads, 20-40 parts of white cement, 2-5 parts of carbon black, 2-5 parts of isocyanate curing agent, 5-10 parts of propylene glycol methyl ether, 0.2-0.5 part of pH regulator and 50-70 parts of deionized water;
(5) coating and baking the second time to form a reflecting electromagnetic wave and coloring a middle paint layer: quantitatively, uniformly and continuously spraying a specially configured Chinese paint coating containing a nano flaky body for reflecting electromagnetic waves and a specific color on a plastic shell workpiece, and forming a uniform and continuous Chinese paint coating on the surface of the plastic shell workpiece in a forced drying mode by using a tunnel furnace to realize the required effect of reflecting external electromagnetic waves and setting the color on the plastic shell workpiece;
the crude oil of the intermediate paint coating is prepared from the following raw materials in parts by weight: 20-30 parts of waterborne polyurethane resin, 10-20 parts of waterborne acrylic resin, 5-15 parts of titanium dioxide, 2-5 parts of inorganic pigment, 5-10 parts of nano nickel-plated graphite micro-sheet, 2-5 parts of waterborne zinc stearate, 5-10 parts of sodium hexametaphosphate, 5-10 parts of wax powder, 1-5 parts of calcium carbonate, 0.2-1 part of pH regulator and 50-70 parts of deionized water;
(6) and (3) coating and baking three times to form a protective and high-gloss finish paint layer: the specially prepared transparent finish paint is quantitatively, uniformly and continuously sprayed on the plastic shell workpiece, and the paint forms a uniform and continuous coating on the surface of the plastic shell workpiece in a forced drying mode, so that the adhesive force and the glossiness of the coating are enhanced;
the crude oil of the finish paint is prepared from the following raw materials in parts by weight: 30-40 parts of styrene-acrylic emulsion, 45-55 parts of acrylic emulsion, 2-5 parts of adhesion promoter, 1-3 parts of flatting agent, 1-5 parts of filler, 0.5-2 parts of surfactant, 0.2-0.8 part of defoaming agent, 0.1-1 part of thickening agent, 0.5-1 part of antioxidant and 50-90 parts of water;
(7) and (3) natural cooling: and naturally cooling the plastic shell workpiece to normal temperature to obtain a finished product.
2. The coating method of the water-based paint for the plastic shell workpiece of the television set as claimed in claim 1, wherein the step (4) further comprises the following steps:
(41) preparing water-based primer coating crude oil for absorbing waves and light;
(42) diluting and blending: according to the following parts by weight: deionized water = 9: 1, diluting the primer, and uniformly stirring, wherein the viscosity is controlled to be 8.5-11 pas at normal temperature and normal pressure in a rock field NK-2 viscosity cup;
(43) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared primer coating, wherein the temperature of a preheating section is set to be 20-35 ℃, and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(44) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, selecting an absorption type or a gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure of the spray gun is 0.4-0.5MPa, and the air pressure of the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(45) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 0.8-1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(451) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous primer coating with uniform thickness;
(452) and (3) entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the shell from the tunnel furnace after drying to finish one-coating one-baking.
3. The coating method of the water-based paint for the plastic shell workpiece of the television set as claimed in claim 2, wherein the step (41) of preparing the crude oil of the primer paint further comprises the following steps:
(411) weighing the following raw material components: weighing the following components in parts by weight: 50-60 parts of urushiol formaldehyde polycondensate emulsion, 10-20 parts of urushiol base emulsifier, 5-10 parts of nickel-plated nano hollow glass beads, 20-40 parts of white cement, 2-5 parts of carbon black, 2-5 parts of isocyanate curing agent, 5-10 parts of propylene glycol methyl ether, 0.2-0.5 part of pH regulator and 50-70 parts of deionized water;
(412) stirring at a low speed: adding isocyanate curing agent, propylene glycol methyl ether and 0.2-0.5 part of pH regulator into a stirrer in turn, stirring for 5-10 minutes at 500-600 rpm, and stirring until the mixture is uniform and transparent and is dissolved in deionized water;
(413) and (3) stirring at medium speed: sequentially adding the urushiol formaldehyde polycondensate emulsion, the urushiol-based emulsifier, the white cement and the carbon black into a stirrer, and stirring for 5-10 minutes at 800-1000 r/min;
(414) high-speed stirring: adding the nickel-plated nano hollow glass microspheres into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm to uniformly stir the nickel-plated nano hollow glass microspheres;
(415) and pouring the stirred raw materials into a coating bucket to prepare the primer coating crude oil.
4. The coating method of the water-based paint for the plastic shell workpiece of the television set as claimed in claim 1, wherein the step (5) further comprises the following steps:
(51) preparing water-based Chinese paint coating crude oil for reflecting electromagnetic waves and coloring;
(52) diluting and blending: according to the Chinese paint coating crude oil, the weight portions are as follows: deionized water = 10: 1, diluting the primer, and uniformly stirring, wherein the viscosity is controlled to be 8.5-11 pas at normal temperature and normal pressure in a rock field NK-2 viscosity cup;
(53) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared paint, wherein the temperature of a preheating section is set to be 20-35 ℃ and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(54) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, selecting an absorption type or a gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure of the spray gun is 0.4-0.5MPa, and the air pressure of the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(55) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 0.8-1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(551) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous and uniform-thickness intermediate paint coating;
(552) and entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the shell from the tunnel furnace after drying to finish secondary coating and secondary baking.
5. The coating method of the water-based paint for the plastic shell workpiece of the television set as claimed in claim 4, wherein the preparation of the crude oil of the paint in the step (51) further comprises the following steps:
(511) weighing the following raw material components: weighing the following components in parts by weight: 20-30 parts of waterborne polyurethane resin, 10-20 parts of waterborne acrylic resin, 5-15 parts of titanium dioxide, 2-5 parts of inorganic pigment, 5-10 parts of nano nickel-plated graphite micro-sheet, 2-5 parts of waterborne zinc stearate, 5-10 parts of sodium hexametaphosphate, 5-10 parts of wax powder, 1-5 parts of calcium carbonate, 0.2-1 part of pH regulator and 50-70 parts of deionized water;
(512) stirring at a low speed: sequentially adding water-based zinc stearate, sodium hexametaphosphate, a pH regulator, inorganic pigment and deionized water into a stirrer, and stirring for 5-10 minutes at 500-600 revolutions per minute to uniformly dissolve the water-based zinc stearate, the sodium hexametaphosphate, the pH regulator and the inorganic pigment in water;
(513) and (3) stirring at medium speed: sequentially adding the waterborne polyurethane resin, the waterborne acrylic emulsion, the titanium dioxide, the wax powder and the calcium carbonate into a stirrer, and stirring for 5-10 minutes at the speed of 800-;
(514) high-speed stirring: adding the nano nickel-plated graphite micro-sheet into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm;
(515) and pouring the stirred raw materials into a coating bucket to prepare the Chinese paint crude oil.
6. The coating method of the water-based paint for the plastic shell workpiece of the television set as claimed in claim 1, wherein the step (6) further comprises the following steps:
(61) preparing transparent and high-brightness finish paint crude oil;
(62) diluting and blending: according to the finish crude oil, the paint comprises the following components in parts by weight: deionized water = 10: 1.5, diluting the face paint, and uniformly stirring, wherein the viscosity is controlled to be 8-11 pas at normal temperature and normal pressure in a rock field NK-2 viscosity cup;
(63) preheating before spraying: preheating the plastic shell workpiece before spraying and the prepared paint, wherein the temperature of a preheating section is set to be 20-35 ℃ and the time is 2-5 min; the paint film can be diffused and leveled to form a continuous coating with uniform thickness;
(64) electrostatic spraying: setting the temperature of the spray booth within 10-40 ℃, setting the humidity at 20-90% RH, selecting an absorption type or a gravity type spray gun to obtain good supply atomization conditions, wherein the air pressure of the spray gun is 0.4-0.5MPa, and the air pressure of the spray gun is 0.3-0.35 MPa; starting a spray gun to spray the shell, and quantitatively, uniformly and continuously spraying the water-based primer on the plastic shell workpiece;
(65) conveying to a tunnel furnace for drying: setting the speed of the drying conveying line to be 0.8-1.2m/min, and conveying the sprayed shell into a tunnel furnace for two-stage drying:
(651) preheating after spraying: preheating the sprayed plastic shell workpiece and the sprayed primer paint film, wherein the temperature of a preheating section is set to be 40-45 ℃ and the time is 6-10 min; the paint film can be diffused and leveled to form a continuous finish paint coating with uniform thickness;
(652) and entering a forced drying stage after preheating is finished, setting the baking temperature to be 60-75 ℃ and the baking time to be 25-30min, and leaving the shell from the tunnel furnace after drying to finish the three-coating three-baking.
7. The coating method of the water-based paint for the plastic shell workpiece of the television set as claimed in claim 6, wherein the step (61) of preparing the crude oil of the finish paint further comprises the following steps:
(611) weighing the following raw material components: weighing the following components in parts by weight: 30-40 parts of styrene-acrylic emulsion, 45-55 parts of acrylic emulsion, 2-5 parts of adhesion promoter, 1-3 parts of flatting agent, 1-5 parts of filler, 0.5-2 parts of surfactant, 0.2-0.8 part of defoaming agent and 0.1-1 part of thickening agent; 0.5-1 part of antioxidant and 50-90 parts of water;
(612) stirring at a low speed: sequentially adding the adhesion promoter, the flatting agent, the surfactant, the defoaming agent, the thickening agent, the antioxidant and the deionized water into a stirring machine, and stirring for 5-10 minutes at the speed of 500 plus 600 revolutions per minute to uniformly dissolve the materials in water;
(613) and (3) stirring at medium speed: sequentially adding 30-40 parts of styrene-acrylic emulsion and acrylic emulsion into a stirrer, and stirring for 5-10 minutes at 800-;
(614) high-speed stirring: adding the filler into a stirrer, and stirring for 3-5 minutes at 1000-1200 rpm;
(615) and pouring the stirred raw materials into a coating bucket to prepare the finish coating crude oil.
CN201710353456.XA 2017-05-18 2017-05-18 Water-based paint coating method and water-based paint for plastic shell of television receiver Active CN107008634B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710353456.XA CN107008634B (en) 2017-05-18 2017-05-18 Water-based paint coating method and water-based paint for plastic shell of television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710353456.XA CN107008634B (en) 2017-05-18 2017-05-18 Water-based paint coating method and water-based paint for plastic shell of television receiver

Publications (2)

Publication Number Publication Date
CN107008634A CN107008634A (en) 2017-08-04
CN107008634B true CN107008634B (en) 2020-12-29

Family

ID=59450219

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710353456.XA Active CN107008634B (en) 2017-05-18 2017-05-18 Water-based paint coating method and water-based paint for plastic shell of television receiver

Country Status (1)

Country Link
CN (1) CN107008634B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107899906A (en) * 2017-12-08 2018-04-13 重庆徐丁科技有限公司 Lacquer spraying technique
CN108492541A (en) * 2018-03-21 2018-09-04 沈阳维顶机器人有限公司 A kind of electric appliance intelligent controlling device
CN109877024A (en) * 2019-04-15 2019-06-14 苏州福慧材料科技有限公司 A kind of electrostatic painting process of solar energy backboard
CN110540798B (en) * 2019-08-23 2021-10-22 东莞顺驰塑胶科技有限公司 Spray paint for injection molding and spraying process thereof
CN110951337A (en) * 2019-10-23 2020-04-03 广东华斓汽车材料研究院 Water-based road sign paint, preparation method and equipment
CN110684438B (en) * 2019-11-07 2021-07-16 青岛水性七彩新材料有限公司 Water-based anti-corrosion anti-aging wave-absorbing coating and preparation method thereof
CN110813031A (en) * 2019-11-26 2020-02-21 天津宝丽杰涂料有限公司 Formaldehyde adsorption device for coating and use method thereof
CN112676133A (en) * 2020-12-01 2021-04-20 成都宏明双新科技股份有限公司 Water-based paint spraying process
CN113262965A (en) * 2021-05-31 2021-08-17 郭林华 Processing method special for spraying baking paint on surface of PE blow molding part
CN114347683A (en) * 2022-01-07 2022-04-15 东莞市广正模具塑胶有限公司 Gold stamping process for mobile phone battery cover plate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1524906A (en) * 2003-09-16 2004-09-01 上海材料研究所 Method for setting up a broad band electromagnetic screen and coating thereof
CN101250367A (en) * 2008-04-09 2008-08-27 中国人民解放军海军后勤技术装备研究所 Novel composite electromagnetic shielding latex paint and preparation thereof
CN101629029A (en) * 2009-08-19 2010-01-20 徐瑞龙 Civil air defence electromagnetic shielding coating and preparation method thereof
CN102671844A (en) * 2011-03-15 2012-09-19 东莞市旭通达模具塑胶有限公司 Process for spraying plastic parts of mobile phone and mobile phone shell made by adopting process
CN102757710A (en) * 2012-06-01 2012-10-31 安徽省金盾涂料有限责任公司 Water paint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1524906A (en) * 2003-09-16 2004-09-01 上海材料研究所 Method for setting up a broad band electromagnetic screen and coating thereof
CN101250367A (en) * 2008-04-09 2008-08-27 中国人民解放军海军后勤技术装备研究所 Novel composite electromagnetic shielding latex paint and preparation thereof
CN101629029A (en) * 2009-08-19 2010-01-20 徐瑞龙 Civil air defence electromagnetic shielding coating and preparation method thereof
CN102671844A (en) * 2011-03-15 2012-09-19 东莞市旭通达模具塑胶有限公司 Process for spraying plastic parts of mobile phone and mobile phone shell made by adopting process
CN102757710A (en) * 2012-06-01 2012-10-31 安徽省金盾涂料有限责任公司 Water paint

Also Published As

Publication number Publication date
CN107008634A (en) 2017-08-04

Similar Documents

Publication Publication Date Title
CN107008634B (en) Water-based paint coating method and water-based paint for plastic shell of television receiver
CN101899248A (en) Environment-friendly rust inhibiting primer
CN101235243A (en) Multifunctional protection composite coating material
CN102558999B (en) Water-based environment-friendly electrostatic spraying baking paint and preparation method thereof
JPWO2004044065A1 (en) Powder coating, method for producing the same, method of using the powder coating, and coated product
CN101979448B (en) Starflower aesthetical paint and preparation and using methods thereof
CN103286052A (en) Method of spraying and coating electric automobile coating piece surface and enabling painting surface to have reflective effect at night
CN106076779A (en) A kind of wood furniture production technology
CN103788831A (en) Corrosion-proof ice-covering-proof coating
CN103305093B (en) A kind of electrostatic powder coating for tent bracket spraying
CN104087092B (en) A kind of aqueous low solar absorptance anti-static coating preparation method
CN102962187A (en) Transformer oil tank and painting technique for parts thereof
CN104419310A (en) Leather surface matting agent
US10316195B2 (en) Zinc-based composite material and use thereof
CN106182313A (en) A kind of artificial board processing technology
CN102888156A (en) Uvioresistant fluorocarbon metal anti-rust paint and preparation method thereof
CN102993791A (en) Metal paint and preparation method thereof
CN102585689A (en) Voltage-withstand photo-cured anode oxidation coating, as well as preparation method and using method thereof
CN102391753A (en) Water emulsion polymer camouflage color decorative coating and preparation method and use thereof
CN104151989A (en) Amino drying varnish
CN104031539B (en) A kind of electrostatic spraying priming paint
CN104231712A (en) Preparation method of automotive topcoat based on nano diamond packing with high wear resistance
CN105038540A (en) Water-based environment-friendly wear-resistant paint
CN109337464A (en) Indoor water super-thin steel structure fire-proof paint
CN102268210B (en) Additive capable of improving electrostatic effect for spraying fluorocarbon paint

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 523000, Guangdong, Dongguan province Fenggang town Sanlian Village Dongguan Konka Electronics Co., Ltd. Building No. 4, first floor

Applicant after: DONGGUAN XUTONGDA MOULD PLASTIC Co.,Ltd.

Applicant after: Shenzhen Jielunte Technology Co.,Ltd.

Applicant after: DONGGUAN KONKA MOULD PLASTIC Co.,Ltd.

Address before: 523000, Guangdong, Dongguan province Fenggang town Sanlian Village Dongguan Konka Electronics Co., Ltd. Building No. 4, first floor

Applicant before: DONGGUAN XUTONGDA MOULD PLASTIC Co.,Ltd.

Applicant before: SHENZHEN KONKA PRECISION MOULD MANUFACTURING Co.,Ltd.

Applicant before: DONGGUAN KONKA MOULD PLASTIC Co.,Ltd.

GR01 Patent grant
GR01 Patent grant