CN113560153A - Coating method for noble metal postcard - Google Patents

Coating method for noble metal postcard Download PDF

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Publication number
CN113560153A
CN113560153A CN202110887358.0A CN202110887358A CN113560153A CN 113560153 A CN113560153 A CN 113560153A CN 202110887358 A CN202110887358 A CN 202110887358A CN 113560153 A CN113560153 A CN 113560153A
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China
Prior art keywords
postcard
semi
coating
finished
temperature
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CN202110887358.0A
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Chinese (zh)
Inventor
孔祥产
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Zhejiang Yinzhiyuan Precious Metal Co ltd
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Zhejiang Yinzhiyuan Precious Metal Co ltd
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Priority to CN202110887358.0A priority Critical patent/CN113560153A/en
Publication of CN113560153A publication Critical patent/CN113560153A/en
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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
    • 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
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • 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
    • 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
    • B05D3/0486—Operating the coating or treatment in a controlled atmosphere
    • 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
    • B05D3/14—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 electrical means
    • 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
    • B05D7/58—No clear coat specified
    • B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0023—Digital printing methods characterised by the inks used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
    • C23C22/76—Applying the liquid by spraying
    • 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
    • B05D2451/00—Type of carrier, type of coating (Multilayers)
    • 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
    • B05D2504/00—Epoxy 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
    • B05D2518/00—Other type of polymers
    • B05D2518/10—Silicon-containing polymers

Abstract

The invention belongs to the field of post cards, in particular to a method for plating a film on a noble metal post card, which aims at solving the problem that the prior post card is easy to be oxidized and discolored, and provides the following scheme, comprising the following steps: the method comprises the steps of selecting a precious metal plate with proper thickness, cutting and polishing the precious metal plate according to the design size of the postcard, then putting the cut plate into ultrasonic cleaning equipment for cleaning, using hot water with the temperature of more than 70 ℃, adding one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water into the hot water, forming a layer of protective film on the surface of the postcard by using a coating solvent, inert mixed gas and a coating power supply, protecting the postcard by using the protective film, preventing water vapor and oxygen in the air from reacting with the surface of the precious metal, preventing the phenomenon of color change after the postcard is played for a period of time, and protecting the postcard.

Description

Coating method for noble metal postcard
Technical Field
The invention relates to the technical field of postal postcards, in particular to a method for coating a precious metal postcard.
Background
The postcard is a card with image that has written contents that can directly post without envelope, and the image can be the photograph, can be the drawing, and application number 201711414214.3 discloses a postcard, and this postcard can carry out the DIY creation on rice paper in the in-process of using, and its traditional classical painting and calligraphy paper of china that makes full use of rice paper has promoted the holistic decorative effect of this postcard, satisfies people to the user demand of postcard, along with the outbreak of demand such as collection, noble metal postcard also begins to appear.
But present postcard is mostly only at the surface parcel one deck transparent plastic film, and postcard itself does not have the antioxidant power, and transparent plastic film is also damaged easily, and the postcard body exposes in the air for a period of time or after the user played a period of time, and oxidation phenomenon often can appear on the postcard surface, leads to the postcard to change colour, influences the use of vwatching of postcard.
Disclosure of Invention
Based on the problem that the postcard is easy to discolor due to oxidation in the prior art, the invention provides a method for coating a precious metal postcard.
The invention provides a method for coating a noble metal postcard, which comprises the following steps:
s1: selecting a precious metal plate with a proper thickness, cutting and polishing the precious metal plate according to the design size of the postcard, then putting the cut plate into ultrasonic cleaning equipment for cleaning, wherein the cleaning water is hot water with the temperature of more than 70 ℃, one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water are added into the hot water, one pot of boiling water can be boiled first, then salt with the weight of 1.5-2% of that of the boiling water is added into the boiling water, after the salt is completely dissolved, the tinfoil is laid in the pot, after the hot water is boiled again, the precious metal plate is put on the top of the tinfoil, after 30-40 seconds, the plate is taken out, a white board is prepared, then the white board is dried, and finally the postcard is wiped by silver wiping cloth;
s2: smearing epoxy phenolic coating on the surface of a postcard whiteboard, putting the postcard whiteboard coated with the epoxy phenolic coating into drying equipment, starting the drying equipment to dry the postcard whiteboard, taking out the postcard whiteboard after the epoxy phenolic coating is dried, smearing UV (ultraviolet) base oil on the dry epoxy phenolic coating on the surface of the postcard whiteboard by using the smearing equipment, wherein the smearing amount of the UV base oil is controlled to be 15g/m2～20g/m2Then, drying and curing the UV base oil on the surface of the postcard white board, printing a designed postcard image on the postcard white board through a UV printer by using UV ink, curing the postcard image by using a high-temperature ultraviolet lamp, finally putting the cured postcard white board into the UV printer again, printing a transparent protective layer on the surface of the image by using the UV printer, and preventing the image ink from being oxidized and scratched to obtain a postcard semi-finished product;
s3: putting the semi-finished postcard into a vacuum degree environment of vacuum equipment, starting an ion source plasma generator discharging system, performing discharging activation operation on the outer layer of the semi-finished postcard by using the ion source plasma generator discharging system, and stimulating substances on the surface layer of the semi-finished postcard by using current to stimulate the activity of the surface layer of the semi-finished postcard;
s4: introducing inert mixed gas into the vacuum equipment, wherein the inert mixed gas comprises 1-3% of nitrogen and 97-99% of argon, starting a heating device to heat a semi-finished postcard to be coated until the temperature of the semi-finished postcard rises to 80-100 ℃, then spraying coating solvent on the surface of the semi-finished postcard from six directions of up, down, left, right, front and back by using an atomizing spray head, so that the coating solvent is uniformly distributed and stays on the surface layer of the semi-finished postcard, the coating solvent is formed by mixing 30-35% of tetraethoxysilane, 20-25% of octamethylcyclotetrasiloxane and 40-50% of triethanolamine, performing discharge operation on the semi-finished postcard by using a high-voltage coating power supply, and reacting current with the coating solvent under the protection of the inert mixed gas, so as to perform coating operation on the surface of the semi-finished postcard, forming a primary protective film on the surface layer of the postcard;
s5: and starting the heating device again to heat the semi-finished postcard until the temperature of the semi-finished postcard rises to 140-160 ℃, and then continuing to use the high-voltage coating power supply to perform discharge coating according to the steps to finally obtain the finished postcard.
Preferably, in S1, the cutting and polishing operation can be performed in a vacuum chamber or in water to avoid oxidation of the precious metal plate, and the precious metal plate is transported into the ultrasonic cleaning device under vacuum after polishing.
Preferably, in S1, the postcard whiteboard is placed into the storage device immediately after drying is completed, and air inside the storage device is pumped out to maintain the storage device in a vacuum state.
Preferably, in S2, the coating amount of the epoxy phenolic coating is controlled to be 10g/m2～15g/m2The drying temperature is controlled to be 120-130 ℃, and the drying time is 14-18 min.
Preferably, in S2, during the drying and curing, the UV base oil on the surface of the postcard white plate is irradiated by using a high-temperature UV lamp, so that the UV base oil is cured, and the power of the UV lamp is 150W/CM to 200W/CM.
Preferably, in S3, the semi-finished postcard is cleaned before discharging, so as to remove ink stains and the like outside the image on the surface of the semi-finished postcard.
Preferably, in S3, the environment around the semi-finished postcard at the time of discharging is: the vacuum degree is 5 Pa-10 Pa, the temperature is kept at normal temperature, and the time of the discharging operation is controlled to be 10 minutes-15 minutes.
Preferably, in S4, when the inert mixed gas is introduced, the pressure around the semi-finished postcard is increased, and the vacuum degree is 20Pa to 50 Pa.
Preferably, in S4, the high voltage coating power source is a pulse power source, an intermediate frequency power source or a radio frequency power source.
Preferably, in S5, after the temperature of the postcard is reduced to 30 ℃ to 35 ℃, air is introduced, and after the atmosphere around the postcard is restored, the postcard can be taken out.
The invention has the beneficial effects that:
1. the high-voltage coating power supply can stimulate the coating solvent and the inert mixed gas to enable substances in the coating solvent and the inert mixed gas to react with each other, so that a layer of protective film can be formed on the surface of the postcard, the activity of the surface layer of the postcard is reduced, and the postcard is protected by the protective film;
2. the protective film can prevent water vapor, oxygen and the like in the air from reacting with active substances on the surface of the noble metal, so that the postcard can not change color after being played or exposed in the air for a period of time, and the postcard can be protected only by frequent wiping;
the high-voltage coating power can amazing nitrogen gas, argon gas, tetraethoxysilane, octamethylcyclotetrasiloxane, triethanolamine and noble metal top layer in the operation process of discharging for the postcard top layer takes place chemical reaction, thereby generates the protection film, utilizes the protection film can be anti-oxidant, prevents that noble metal from discolouing, makes noble metal postcard remain true qualities all the time, thereby effectively protects noble metal postcard.
Drawings
Fig. 1 is a flow chart of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Referring to FIG. 1, the first embodiment
The embodiment provides a method for coating a noble metal postcard, which comprises the following steps:
s1: selecting a noble metal plate with proper thickness, cutting and polishing the noble metal plate according to the design size of the postcard, then putting the plate obtained by cutting into ultrasonic cleaning equipment for cleaning, using hot water with the temperature of more than 70 ℃, adding one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water into the hot water, boiling one pot of boiling water, then adding salt with the weight of 1.5-2% of the weight of the boiling water into the boiling water, laying the tinfoil in the pot after the salt is completely dissolved, putting the noble metal plate on the top of the tinfoil after the hot water is boiled again, taking out the plate after 30-40 seconds, preparing a white plate, then drying the white plate, finally wiping the postcard by using a silver wiping cloth, carrying out cutting and polishing operation in a vacuum cavity or water, avoiding oxidation of the noble metal plate, transferring the polished postcard into the ultrasonic cleaning equipment under a vacuum condition, immediately putting the postcard white board into storage equipment after drying is finished, and extracting air in the storage equipment to keep the postcard white board in a vacuum state;
s2: smearing epoxy phenolic coating on the surface of postcard white board, putting the postcard white board coated with the epoxy phenolic coating into drying equipment, starting the drying equipment to dry the postcard white board, taking out the postcard white board after the epoxy phenolic coating is dried, wherein the smearing amount of the epoxy phenolic coating is controlled to be 10g/m2～15g/m2The drying temperature is controlled to be 120-130 ℃, the drying time is 14-18 min, then UV base oil is coated on the epoxy phenolic coating dried on the surface of the postcard white plate by using coating equipment, and the coating amount of the UV base oil is controlled to be 15g/m2～20g/m2Then, drying and curing the UV base oil on the surface of the postcard white board, wherein during drying and curing, a high-temperature UV lamp is used for irradiating the UV base oil on the surface of the postcard white board so that the UV base oil is cured, the power of the UV lamp is 150W/CM-200W/CM, then a designed postcard image is printed on the postcard white board through a UV printer by using UV ink, then the postcard image is cured by using a high-temperature ultraviolet lamp, finally the cured postcard white board is put into the UV printer again, a transparent protective layer is printed on the surface of the image by using the UV printer, and the image ink is prevented from being oxidized and scraped, so that a postcard semi-finished product is obtained;
s3: put into vacuum equipment's vacuum degree environment with semi-manufactured goods of postcard, start ion source plasma generator discharge system, utilize ion source plasma generator discharge system to carry out the activation operation that discharges to semi-manufactured goods of postcard's outer layer, utilize the material on electric current stimulation semi-manufactured goods top layer of postcard, arouse the activity on semi-manufactured goods top layer of postcard, wash semi-manufactured goods of postcard before discharging, clear away the outer printing ink spot of semi-manufactured goods surface image of postcard etc. the environment on every side of semi-manufactured goods of postcard is when discharging: the vacuum degree is 5Pa to 10Pa, the temperature is kept at normal temperature, and the discharging operation time is controlled to be 10 minutes to 15 minutes;
s4: introducing inert mixed gas into the vacuum equipment, wherein the inert mixed gas comprises 1 percent of nitrogen and 99 percent of argon, increasing the pressure of the environment around the semi-finished postcard product, the vacuum degree is 20-50 Pa, starting a heating device to heat the semi-finished postcard product to be coated until the temperature of the semi-finished postcard product rises to 80-100 ℃, then spraying coating solvents on the surface of the semi-finished postcard product from six directions, namely up, down, left, right, front and back, by utilizing an atomizing spray head, so that the coating solvents are uniformly distributed and remained on the surface layer of the semi-finished postcard product, the coating solvents are formed by mixing 30 percent of tetraethoxysilane, 20 percent of octamethylcyclotetrasiloxane and 50 percent of triethanolamine, performing discharge operation on the semi-finished postcard product by utilizing a high-pressure coating power supply, and reacting the current with the coating solvents under the protection of the inert mixed gas, thus performing coating operation on the surface of the semi-finished postcard product, the high-voltage film coating power supply is a pulse power supply or a medium-frequency power supply or a radio-frequency power supply, and a primary protective film is formed on the surface layer of the postcard;
s5: and starting the heating device again to heat the semi-finished postcard until the temperature of the semi-finished postcard rises to 140-160 ℃, continuing to use a high-voltage coating power supply to perform discharge coating operation according to the steps to finally obtain the finished postcard, introducing air after the temperature of the postcard is reduced to 30-35 ℃, and taking out the postcard after the atmosphere around the postcard is restored.
Referring to FIG. 1, example II
The embodiment provides a method for coating a noble metal postcard, which comprises the following steps:
s1: selecting a noble metal plate with proper thickness, cutting and polishing the noble metal plate according to the design size of the postcard, then putting the plate obtained by cutting into ultrasonic cleaning equipment for cleaning, using hot water with the temperature of more than 70 ℃, adding one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water into the hot water, boiling one pot of boiling water, then adding salt with the weight of 1.5-2% of the weight of the boiling water into the boiling water, laying the tinfoil in the pot after the salt is completely dissolved, putting the noble metal plate on the top of the tinfoil after the hot water is boiled again, taking out the plate after 30-40 seconds, preparing a white plate, then drying the white plate, finally wiping the postcard by using a silver wiping cloth, carrying out cutting and polishing operation in a vacuum cavity or water, avoiding oxidation of the noble metal plate, transferring the polished postcard into the ultrasonic cleaning equipment under a vacuum condition, immediately putting the postcard white board into storage equipment after drying is finished, and extracting air in the storage equipment to keep the postcard white board in a vacuum state;
s2: smearing epoxy phenolic coating on the surface of postcard white board, putting the postcard white board coated with the epoxy phenolic coating into drying equipment, starting the drying equipment to dry the postcard white board, taking out the postcard white board after the epoxy phenolic coating is dried, wherein the smearing amount of the epoxy phenolic coating is controlled to be 10g/m2～15g/m2The drying temperature is controlled to be 120-130 ℃, the drying time is 14-18 min, then UV base oil is coated on the epoxy phenolic coating dried on the surface of the postcard white plate by using coating equipment, and the coating amount of the UV base oil is controlled to be 15g/m2～20g/m2Then, drying and curing the UV base oil on the surface of the postcard white board, wherein during drying and curing, a high-temperature UV lamp is used for irradiating the UV base oil on the surface of the postcard white board so that the UV base oil is cured, the power of the UV lamp is 150W/CM-200W/CM, then a designed postcard image is printed on the postcard white board through a UV printer by using UV ink, then the postcard image is cured by using a high-temperature ultraviolet lamp, finally the cured postcard white board is put into the UV printer again, a transparent protective layer is printed on the surface of the image by using the UV printer, and the image ink is prevented from being oxidized and scraped, so that a postcard semi-finished product is obtained;
s3: put into vacuum equipment's vacuum degree environment with semi-manufactured goods of postcard, start ion source plasma generator discharge system, utilize ion source plasma generator discharge system to carry out the activation operation that discharges to semi-manufactured goods of postcard's outer layer, utilize the material on electric current stimulation semi-manufactured goods top layer of postcard, arouse the activity on semi-manufactured goods top layer of postcard, wash semi-manufactured goods of postcard before discharging, clear away the outer printing ink spot of semi-manufactured goods surface image of postcard etc. the environment on every side of semi-manufactured goods of postcard is when discharging: the vacuum degree is 5Pa to 10Pa, the temperature is kept at normal temperature, and the discharging operation time is controlled to be 10 minutes to 15 minutes;
s4: introducing inert mixed gas into the vacuum equipment, wherein the inert mixed gas comprises 2 percent of nitrogen and 98 percent of argon, increasing the pressure of the environment around the semi-finished postcard product, the vacuum degree is 20-50 Pa, starting a heating device to heat the semi-finished postcard product to be coated until the temperature of the semi-finished postcard product rises to 80-100 ℃, then spraying coating solvents on the surface of the semi-finished postcard product from six directions, namely up, down, left, right, front and back, by utilizing an atomizing spray head, so that the coating solvents are uniformly distributed and remained on the surface layer of the semi-finished postcard product, the coating solvents are formed by mixing 31 percent of tetraethoxysilane, 21 percent of octamethylcyclotetrasiloxane and 48 percent of triethanolamine, performing discharge operation on the semi-finished postcard product by utilizing a high-pressure coating power supply, and reacting the current with the coating solvents under the protection of the inert mixed gas, thus performing coating operation on the surface of the semi-finished postcard product, the high-voltage film coating power supply is a pulse power supply or a medium-frequency power supply or a radio-frequency power supply, and a primary protective film is formed on the surface layer of the postcard;
s5: and starting the heating device again to heat the semi-finished postcard until the temperature of the semi-finished postcard rises to 140-160 ℃, continuing to use a high-voltage coating power supply to perform discharge coating operation according to the steps to finally obtain the finished postcard, introducing air after the temperature of the postcard is reduced to 30-35 ℃, and taking out the postcard after the atmosphere around the postcard is restored.
Referring to FIG. 1, example III
The embodiment provides a method for coating a noble metal postcard, which comprises the following steps:
s1: selecting a noble metal plate with proper thickness, cutting and polishing the noble metal plate according to the design size of the postcard, then putting the plate obtained by cutting into ultrasonic cleaning equipment for cleaning, using hot water with the temperature of more than 70 ℃, adding one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water into the hot water, boiling one pot of boiling water, then adding salt with the weight of 1.5-2% of the weight of the boiling water into the boiling water, laying the tinfoil in the pot after the salt is completely dissolved, putting the noble metal plate on the top of the tinfoil after the hot water is boiled again, taking out the plate after 30-40 seconds, preparing a white plate, then drying the white plate, finally wiping the postcard by using a silver wiping cloth, carrying out cutting and polishing operation in a vacuum cavity or water, avoiding oxidation of the noble metal plate, transferring the polished postcard into the ultrasonic cleaning equipment under a vacuum condition, immediately putting the postcard white board into storage equipment after drying is finished, and extracting air in the storage equipment to keep the postcard white board in a vacuum state;
s2: smearing epoxy phenolic coating on the surface of postcard white board, putting the postcard white board coated with the epoxy phenolic coating into drying equipment, starting the drying equipment to dry the postcard white board, taking out the postcard white board after the epoxy phenolic coating is dried, wherein the smearing amount of the epoxy phenolic coating is controlled to be 10g/m2～15g/m2The drying temperature is controlled to be 120-130 ℃, the drying time is 14-18 min, then UV base oil is coated on the epoxy phenolic coating dried on the surface of the postcard white plate by using coating equipment, and the coating amount of the UV base oil is controlled to be 15g/m2～20g/m2Then, drying and curing the UV base oil on the surface of the postcard white board, wherein during drying and curing, a high-temperature UV lamp is used for irradiating the UV base oil on the surface of the postcard white board so that the UV base oil is cured, the power of the UV lamp is 150W/CM-200W/CM, then a designed postcard image is printed on the postcard white board through a UV printer by using UV ink, then the postcard image is cured by using a high-temperature ultraviolet lamp, finally the cured postcard white board is put into the UV printer again, a transparent protective layer is printed on the surface of the image by using the UV printer, and the image ink is prevented from being oxidized and scraped, so that a postcard semi-finished product is obtained;
s3: put into vacuum equipment's vacuum degree environment with semi-manufactured goods of postcard, start ion source plasma generator discharge system, utilize ion source plasma generator discharge system to carry out the activation operation that discharges to semi-manufactured goods of postcard's outer layer, utilize the material on electric current stimulation semi-manufactured goods top layer of postcard, arouse the activity on semi-manufactured goods top layer of postcard, wash semi-manufactured goods of postcard before discharging, clear away the outer printing ink spot of semi-manufactured goods surface image of postcard etc. the environment on every side of semi-manufactured goods of postcard is when discharging: the vacuum degree is 5Pa to 10Pa, the temperature is kept at normal temperature, and the discharging operation time is controlled to be 10 minutes to 15 minutes;
s4: introducing inert mixed gas into the vacuum equipment, wherein the inert mixed gas comprises 3 percent of nitrogen and 97 percent of argon, increasing the pressure of the environment around the semi-finished postcard product, the vacuum degree is 20-50 Pa, starting a heating device to heat the semi-finished postcard product to be coated until the temperature of the semi-finished postcard product rises to 80-100 ℃, then spraying coating solvents on the surface of the semi-finished postcard product from six directions, namely up, down, left, right, front and back, by utilizing an atomizing spray head, so that the coating solvents are uniformly distributed and remained on the surface layer of the semi-finished postcard product, the coating solvents are formed by mixing 33 percent of tetraethoxysilane, 23 percent of octamethylcyclotetrasiloxane and 44 percent of triethanolamine, performing discharge operation on the semi-finished postcard product by utilizing a high-pressure coating power supply, and reacting the current with the coating solvents under the protection of the inert mixed gas, thus performing coating operation on the surface of the semi-finished postcard product, the high-voltage film coating power supply is a pulse power supply or a medium-frequency power supply or a radio-frequency power supply, and a primary protective film is formed on the surface layer of the postcard;
s5: and starting the heating device again to heat the semi-finished postcard until the temperature of the semi-finished postcard rises to 140-160 ℃, continuing to use a high-voltage coating power supply to perform discharge coating operation according to the steps to finally obtain the finished postcard, introducing air after the temperature of the postcard is reduced to 30-35 ℃, and taking out the postcard after the atmosphere around the postcard is restored.
Referring to FIG. 1, example No. four
The embodiment provides a method for coating a noble metal postcard, which comprises the following steps:
s1: selecting a noble metal plate with proper thickness, cutting and polishing the noble metal plate according to the design size of the postcard, then putting the plate obtained by cutting into ultrasonic cleaning equipment for cleaning, using hot water with the temperature of more than 70 ℃, adding one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water into the hot water, boiling one pot of boiling water, then adding salt with the weight of 1.5-2% of the weight of the boiling water into the boiling water, laying the tinfoil in the pot after the salt is completely dissolved, putting the noble metal plate on the top of the tinfoil after the hot water is boiled again, taking out the plate after 30-40 seconds, preparing a white plate, then drying the white plate, finally wiping the postcard by using a silver wiping cloth, carrying out cutting and polishing operation in a vacuum cavity or water, avoiding oxidation of the noble metal plate, transferring the polished postcard into the ultrasonic cleaning equipment under a vacuum condition, immediately putting the postcard white board into storage equipment after drying is finished, and extracting air in the storage equipment to keep the postcard white board in a vacuum state;
s2: smearing epoxy phenolic coating on the surface of postcard white board, putting the postcard white board coated with the epoxy phenolic coating into drying equipment, starting the drying equipment to dry the postcard white board, taking out the postcard white board after the epoxy phenolic coating is dried, wherein the smearing amount of the epoxy phenolic coating is controlled to be 10g/m2～15g/m2The drying temperature is controlled to be 120-130 ℃, the drying time is 14-18 min, then UV base oil is coated on the epoxy phenolic coating dried on the surface of the postcard white plate by using coating equipment, and the coating amount of the UV base oil is controlled to be 15g/m2～20g/m2Then, drying and curing the UV base oil on the surface of the postcard white board, wherein during drying and curing, a high-temperature UV lamp is used for irradiating the UV base oil on the surface of the postcard white board so that the UV base oil is cured, the power of the UV lamp is 150W/CM-200W/CM, then a designed postcard image is printed on the postcard white board through a UV printer by using UV ink, then the postcard image is cured by using a high-temperature ultraviolet lamp, finally the cured postcard white board is put into the UV printer again, a transparent protective layer is printed on the surface of the image by using the UV printer, and the image ink is prevented from being oxidized and scraped, so that a postcard semi-finished product is obtained;
s3: put into vacuum equipment's vacuum degree environment with semi-manufactured goods of postcard, start ion source plasma generator discharge system, utilize ion source plasma generator discharge system to carry out the activation operation that discharges to semi-manufactured goods of postcard's outer layer, utilize the material on electric current stimulation semi-manufactured goods top layer of postcard, arouse the activity on semi-manufactured goods top layer of postcard, wash semi-manufactured goods of postcard before discharging, clear away the outer printing ink spot of semi-manufactured goods surface image of postcard etc. the environment on every side of semi-manufactured goods of postcard is when discharging: the vacuum degree is 5Pa to 10Pa, the temperature is kept at normal temperature, and the discharging operation time is controlled to be 10 minutes to 15 minutes;
s4: introducing inert mixed gas into the vacuum equipment, wherein the inert mixed gas comprises 3 percent of nitrogen and 97 percent of argon, increasing the pressure of the environment around the semi-finished postcard product, the vacuum degree is 20-50 Pa, starting a heating device to heat the semi-finished postcard product to be coated until the temperature of the semi-finished postcard product rises to 80-100 ℃, then spraying coating solvents on the surface of the semi-finished postcard product from six directions, namely up, down, left, right, front and back, by utilizing an atomizing spray head, so that the coating solvents are uniformly distributed and remained on the surface layer of the semi-finished postcard product, the coating solvents are formed by mixing 34 percent of tetraethoxysilane, 24 percent of octamethylcyclotetrasiloxane and 42 percent of triethanolamine, performing discharge operation on the semi-finished postcard product by utilizing a high-pressure coating power supply, and reacting the current with the coating solvents under the protection of the inert mixed gas, thus performing coating operation on the surface of the semi-finished postcard product, the high-voltage film coating power supply is a pulse power supply or a medium-frequency power supply or a radio-frequency power supply, and a primary protective film is formed on the surface layer of the postcard;
s5: and starting the heating device again to heat the semi-finished postcard until the temperature of the semi-finished postcard rises to 140-160 ℃, continuing to use a high-voltage coating power supply to perform discharge coating operation according to the steps to finally obtain the finished postcard, introducing air after the temperature of the postcard is reduced to 30-35 ℃, and taking out the postcard after the atmosphere around the postcard is restored.
Referring to FIG. 1, example V
The embodiment provides a method for coating a noble metal postcard, which comprises the following steps:
s1: selecting a noble metal plate with proper thickness, cutting and polishing the noble metal plate according to the design size of the postcard, then putting the plate obtained by cutting into ultrasonic cleaning equipment for cleaning, using hot water with the temperature of more than 70 ℃, adding one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water into the hot water, boiling one pot of boiling water, then adding salt with the weight of 1.5-2% of the weight of the boiling water into the boiling water, laying the tinfoil in the pot after the salt is completely dissolved, putting the noble metal plate on the top of the tinfoil after the hot water is boiled again, taking out the plate after 30-40 seconds, preparing a white plate, then drying the white plate, finally wiping the postcard by using a silver wiping cloth, carrying out cutting and polishing operation in a vacuum cavity or water, avoiding oxidation of the noble metal plate, transferring the polished postcard into the ultrasonic cleaning equipment under a vacuum condition, immediately putting the postcard white board into storage equipment after drying is finished, and extracting air in the storage equipment to keep the postcard white board in a vacuum state;
s2: smearing epoxy phenolic coating on the surface of postcard white board, putting the postcard white board coated with the epoxy phenolic coating into drying equipment, starting the drying equipment to dry the postcard white board, taking out the postcard white board after the epoxy phenolic coating is dried, wherein the smearing amount of the epoxy phenolic coating is controlled to be 10g/m2～15g/m2The drying temperature is controlled to be 120-130 ℃, the drying time is 14-18 min, then UV base oil is coated on the epoxy phenolic coating dried on the surface of the postcard white plate by using coating equipment, and the coating amount of the UV base oil is controlled to be 15g/m2～20g/m2And then, drying and curing the UV base coat on the surface of the postcard white board, during drying and curing, irradiating the UV base coat on the surface of the postcard white board by using a high-temperature UV lamp to cure the UV base coat, wherein the power of the UV lamp is 150W/CM-200W/CM, printing a designed postcard image on the postcard white board by using UV printing ink through a UV printer, curing the postcard image by using a high-temperature ultraviolet lamp, finally putting the cured postcard white board into the UV printer again, and printing a transparent protective layer on the surface of the image by using the UV printerPreventing the image ink from being oxidized and scratched to obtain a semi-finished postcard product;
s3: put into vacuum equipment's vacuum degree environment with semi-manufactured goods of postcard, start ion source plasma generator discharge system, utilize ion source plasma generator discharge system to carry out the activation operation that discharges to semi-manufactured goods of postcard's outer layer, utilize the material on electric current stimulation semi-manufactured goods top layer of postcard, arouse the activity on semi-manufactured goods top layer of postcard, wash semi-manufactured goods of postcard before discharging, clear away the outer printing ink spot of semi-manufactured goods surface image of postcard etc. the environment on every side of semi-manufactured goods of postcard is when discharging: the vacuum degree is 5Pa to 10Pa, the temperature is kept at normal temperature, and the discharging operation time is controlled to be 10 minutes to 15 minutes;
s4: introducing inert mixed gas into the vacuum equipment, wherein the inert mixed gas comprises 2 percent of nitrogen and 98 percent of argon, increasing the pressure of the environment around the semi-finished postcard product, the vacuum degree is 20-50 Pa, starting a heating device to heat the semi-finished postcard product to be coated until the temperature of the semi-finished postcard product rises to 80-100 ℃, then spraying coating solvents on the surface of the semi-finished postcard product from six directions, namely up, down, left, right, front and back, by utilizing an atomizing spray head, so that the coating solvents are uniformly distributed and remained on the surface layer of the semi-finished postcard product, the coating solvents are formed by mixing 35 percent of tetraethoxysilane, 25 percent of octamethylcyclotetrasiloxane and 40 percent of triethanolamine, performing discharge operation on the semi-finished postcard product by utilizing a high-pressure coating power supply, and reacting the current with the coating solvents under the protection of the inert mixed gas, thus performing coating operation on the surface of the semi-finished postcard product, the high-voltage film coating power supply is a pulse power supply or a medium-frequency power supply or a radio-frequency power supply, and a primary protective film is formed on the surface layer of the postcard;
s5: and starting the heating device again to heat the semi-finished postcard until the temperature of the semi-finished postcard rises to 140-160 ℃, continuing to use a high-voltage coating power supply to perform discharge coating operation according to the steps to finally obtain the finished postcard, introducing air after the temperature of the postcard is reduced to 30-35 ℃, and taking out the postcard after the atmosphere around the postcard is restored.
Comparing a conventional postcard with a postcard prepared according to examples one to five, the postcard prepared according to examples one to five is as follows:
example one Example two EXAMPLE III Example four EXAMPLE five
Placing in air with humidity of 75% -95% for ninety days Color difference of 0.021 The color difference was 0.017 The color difference was 0.012 The color difference was 0.016 Color difference of 0.019
Salt spray test time 43 hours 46 hours 49 hours 47 hours 45 hours
As can be seen from the above table, the postcard according to the present invention has significantly improved oxidation resistance and discoloration resistance, and the third embodiment is the most preferred embodiment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A method for coating a noble metal postcard is characterized by comprising the following steps:
s1: selecting a precious metal plate with a proper thickness, cutting and polishing the precious metal plate according to the design size of the postcard, then putting the cut plate into ultrasonic cleaning equipment for cleaning, wherein the cleaning water is hot water with the temperature of more than 70 ℃, one or more of salt, concentrated tea water, silver washing water, vinegar, alcohol and ammonia water are added into the hot water, one pot of boiling water can be boiled first, then salt with the weight of 1.5-2% of that of the boiling water is added into the boiling water, after the salt is completely dissolved, the tinfoil is laid in the pot, after the hot water is boiled again, the precious metal plate is put on the top of the tinfoil, after 30-40 seconds, the plate is taken out, a white board is prepared, then the white board is dried, and finally the postcard is wiped by silver wiping cloth;
s2: smearing epoxy phenolic coating on the surface of a postcard whiteboard, putting the postcard whiteboard coated with the epoxy phenolic coating into drying equipment, starting the drying equipment to dry the postcard whiteboard, taking out the postcard whiteboard after the epoxy phenolic coating is dried, smearing UV (ultraviolet) base oil on the dry epoxy phenolic coating on the surface of the postcard whiteboard by using the smearing equipment, wherein the smearing amount of the UV base oil is controlled to be 15g/m2～20g/m2Then, drying and curing the UV base oil on the surface of the postcard white board, printing a designed postcard image on the postcard white board through a UV printer by using UV ink, curing the postcard image by using a high-temperature ultraviolet lamp, and finally putting the cured postcard white board into the UV printer againPrinting a transparent protective layer on the surface of the image by using a UV printer to prevent the image ink from being oxidized and scratched, and obtaining a semi-finished postcard product;
s3: putting the semi-finished postcard into a vacuum degree environment of vacuum equipment, starting an ion source plasma generator discharging system, performing discharging activation operation on the outer layer of the semi-finished postcard by using the ion source plasma generator discharging system, and stimulating substances on the surface layer of the semi-finished postcard by using current to stimulate the activity of the surface layer of the semi-finished postcard;
s4: introducing inert mixed gas into the vacuum equipment, wherein the inert mixed gas comprises 1-3% of nitrogen and 97-99% of argon, starting a heating device to heat a semi-finished postcard to be coated until the temperature of the semi-finished postcard rises to 80-100 ℃, then spraying coating solvent on the surface of the semi-finished postcard from six directions of up, down, left, right, front and back by using an atomizing spray head, so that the coating solvent is uniformly distributed and stays on the surface layer of the semi-finished postcard, the coating solvent is formed by mixing 30-35% of tetraethoxysilane, 20-25% of octamethylcyclotetrasiloxane and 40-50% of triethanolamine, performing discharge operation on the semi-finished postcard by using a high-voltage coating power supply, and reacting current with the coating solvent under the protection of the inert mixed gas, so as to perform coating operation on the surface of the semi-finished postcard, forming a primary protective film on the surface layer of the postcard;
s5: and starting the heating device again to heat the semi-finished postcard until the temperature of the semi-finished postcard rises to 140-160 ℃, and then continuing to use the high-voltage coating power supply to perform discharge coating according to the steps to finally obtain the finished postcard.
2. The method of claim 1, wherein in step S1, the cutting and polishing operation can be performed in a vacuum chamber or water to prevent the noble metal plate from being oxidized, and the polished noble metal plate is transported into an ultrasonic cleaning device under vacuum.
3. The method of claim 1, wherein in step S1, the postcard blank is placed in a storage device immediately after drying, and air is pumped from the storage device to keep the storage device in a vacuum state.
4. The method for coating a noble metal postcard according to claim 1, wherein said amount of epoxy novolac paint applied at S2 is controlled to be 10g/m2～15g/m2The drying temperature is controlled to be 120-130 ℃, and the drying time is 14-18 min.
5. The method for plating a noble metal postcard according to claim 1, wherein said step S2 includes irradiating UV primer on the postcard surface with a high-temperature UV lamp at a power of 150W/CM to 200W/CM to cure the UV primer during the drying and curing step.
6. The method for plating a noble metal postcard according to claim 1, wherein said postcard blank is cleaned before discharging at S3 to remove ink stains and the like from the surface image of the postcard blank.
7. The method for plating a noble metal postcard according to claim 1, wherein said environment surrounding said postcard blank during said discharging step at S3 is: the vacuum degree is 5 Pa-10 Pa, the temperature is kept at normal temperature, and the time of the discharging operation is controlled to be 10 minutes-15 minutes.
8. The method for plating a noble metal postcard according to claim 1, wherein said inert gas mixture is introduced at S4 to increase the pressure of the environment surrounding the postcard blank to a vacuum level of 20Pa to 50 Pa.
9. The method of claim 1, wherein in step S4, the high voltage plating power source is a pulse power source, an intermediate frequency power source, or a radio frequency power source.
10. The method of claim 1, wherein in step S5, when the temperature of the postcard is lowered to 30 ℃ to 35 ℃, air is introduced into the postcard until the atmosphere around the postcard is restored, and the postcard can be taken out.
CN202110887358.0A 2021-08-03 2021-08-03 Coating method for noble metal postcard Pending CN113560153A (en)

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