CN112266715A - Special heat-resistant solvent-resistant LED-UV (light-emitting diode-ultraviolet) curing elastic coating system for wood veneer and preparation and coating methods - Google Patents

Special heat-resistant solvent-resistant LED-UV (light-emitting diode-ultraviolet) curing elastic coating system for wood veneer and preparation and coating methods Download PDF

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Publication number
CN112266715A
CN112266715A CN202011316217.5A CN202011316217A CN112266715A CN 112266715 A CN112266715 A CN 112266715A CN 202011316217 A CN202011316217 A CN 202011316217A CN 112266715 A CN112266715 A CN 112266715A
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China
Prior art keywords
led
elastic
percent
coating
veneer
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Application number
CN202011316217.5A
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Chinese (zh)
Inventor
刘立新
沈轩
李祥
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Hunan Jinhai Technology Co ltd
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Hunan Jinhai Technology Co ltd
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Priority to CN202011316217.5A priority Critical patent/CN112266715A/en
Publication of CN112266715A publication Critical patent/CN112266715A/en
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/002Priming paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18Fireproof paints including high temperature resistant paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/34Filling pastes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00Properties
    • C08L2201/08Stabilised against heat, light or radiation or oxydation

Abstract

A heat-resistant solvent-resistant LED-UV curing elastic coating system for wood veneer and a preparation and coating method thereof. The LED-UV coating system consists of two paints, and PU finishing paint can be well coated after the paint is prepared by common roller coating and forward and reverse roller coating. The specific application method of the elastic coating comprises the steps of firstly rolling LED-UV elastic putty on a veneer in a roller way, and then rolling an LED-UV elastic sanding bottom in a roller way. The LED-UV low-energy curing light source is effectively utilized, the curing is performed quickly and deeply, the energy consumption is low, the adhesive force is excellent, and the high-temperature resistance and the solvent resistance are good. The paint film has good elasticity and is more flexible, and can resist the carbonization of the back surface of a high-temperature lighter without blister and does not crack when being folded at 180 degrees. The PU finishing coat can be well coated on the surface.

Description

Special heat-resistant solvent-resistant LED-UV (light-emitting diode-ultraviolet) curing elastic coating system for wood veneer and preparation and coating methods
Technical Field
The invention relates to the field of ultraviolet light curing materials, in particular to a special heat-resistant and solvent-resistant LED-UV curing elastic coating system for wood veneer, and a preparation method and a coating method thereof.
Background
The traditional volume formulation wood skin paint contains a large amount of VOC solvent, has slow curing speed and low production efficiency, and has great harm to the health of people in the production and use processes. In recent years, the UV-cured elastic veneer system coating has the advantages of environmental protection, high efficiency, high quality, wide application and the like, becomes the most concerned novel veneer coating, and has a great development prospect.
The UV-cured elastic veneer system coating is cured by adopting a high-pressure mercury lamp UV light source, the ultraviolet light energy emitted by the high-pressure mercury lamp in a working state is only 30%, and most of the ultraviolet light energy is infrared energy. The large amount of infrared rays can cause the surface temperature of the workpiece to be over-heated in the production process, so that the workpiece is damaged. The mercury lamp UV is concentrated in the wavelength range of 280-320 nm. The ultraviolet light in a specific wave band is not concentrated, the penetrating power is low, and particularly the adhesion on dark wood veneers is poor.
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the special device 1 adopts LED-UV curing equipment, ultraviolet light generated by a light source is concentrated at a specific wavelength, has good coating penetrating power, and ensures complete curing of dark wood veneer. 2, LED-UV curing equipment is adopted, so that the heating is low in the production process, and the thermal damage to the surface of the veneer is avoided. The invention provides an LED-UV veneer coating formula system matched with LED-UV curing by combining a plurality of advantages of LED-UV curing. The coating has the advantages of high solid content, rapid deep curing, low energy consumption, good adhesive force, excellent elasticity, high temperature resistance and solvent resistance.
Disclosure of Invention
In order to achieve the purpose, the invention adopts the technical scheme that.
An LED-UV cured elastic putty coating is prepared by the following components in percentage by weight;
50-60% of elastic polyurethane
5 to 10 percent of modified epoxy resin
20 to 30 percent of special monomer
4 to 6 percent of photoinitiator
3 to 5 percent of adhesion promoter
0.1 to 0.3 percent of flatting agent
0.1 to 0.3 percent of defoaming agent
Wherein the elastic resin is polyurethane with an aliphatic two-functionality macromolecular structure;
the modified epoxy resin is epoxy acrylate modified by fatty acid or anhydride;
the special monomer is environment-friendly acrylate with high temperature resistance, low stimulation and good flexibility;
the photoinitiator mainly comprises two or more photoinitiators with characteristic absorption wavelengths of 365nm and 395 nm;
the flatting agent is acrylate flatting agent. Such as Digao F370, ByK-358N;
the defoaming agent is an acrylate defoaming agent.
The preparation method comprises the following steps: mixing elastic polyurethane, modified epoxy resin, special monomer and photoinitiator. Heating to 60 ℃ for dispersing for 1 hour at the stirring speed of 800-; and adding a photoinitiator for complete dissolution, adding an adhesion promoter, and dispersing for 1 hour to obtain the LED-UV cured elastic coating.
The preparation formula of the LED-UV cured elastic sanding primer comprises the following components in percentage by weight;
30-40% of elastic polyurethane
5 to 10 percent of modified epoxy resin
20 to 30 percent of special monomer
4 to 6 percent of photoinitiator
3 to 5 percent of adhesion promoter
0.1 to 0.3 percent of flatting agent
0.1 to 0.3 percent of defoaming agent
10 to 15 percent of talcum powder
0.5 percent of anti-settling agent
Wherein the elastic resin is polyurethane with an aliphatic two-functionality macromolecular structure;
the modified epoxy resin is epoxy acrylate modified by fatty acid or anhydride;
the special monomer is environment-friendly acrylate with high temperature resistance, low stimulation and good flexibility;
the photoinitiator mainly comprises two or more photoinitiators with characteristic absorption wavelengths of 365nm and 395 nm;
the leveling agent is acrylate leveling agent, such as digao F370, ByK-358N;
the defoaming agent is acrylate defoaming agent, such as Digao 920, ByK-055;
the talcum powder is 800 meshes and 1250 meshes;
the anti-settling agent is Degussa M-5 or A-200.
The preparation method comprises the following steps: mixing elastic polyurethane, modified epoxy resin, special monomer and photoinitiator; heating to 60 ℃ for dispersing for 1 hour at the stirring speed of 800-; and adding talcum powder, an anti-settling agent and a photoinitiator, completely dissolving, adding an adhesion promoter, and dispersing for 1 hour to obtain the LED-UV cured elastic sanding primer.
According to the performance requirements of the LED-UV cured elastic veneer system coating and the preparation method thereof, the raw materials are extensively tested and screened; testing, screening and evaluating various elastic polyurethanes to obtain the high-molecular-weight elastic polyurethane with high temperature resistance, solvent resistance, high elasticity and toughness which are suitable for the requirements of the invention. The resin is finally converted into veneer with the characteristics of high elasticity, high kneading toughness, high temperature resistance, solvent resistance and the like. Such as DAY-429HN resin, Chanshataiya. And the present company JS-302.
The modified epoxy resin is epoxy acrylate modified by fatty acid or anhydride. Has high elasticity, high kneading toughness and high temperature resistance, such as K4220 in Jiangmenkou field and JS217P75 made by the company.
The specific monomers as described above; the active monomers are several special monomers with single tube energy. The monomers comprise hydroxyethyl methacrylate (HEMA), Acrylide (ACMO), and hydroxahalopropyl acrylate. The modified polyvinyl chloride resin mainly provides a diluting effect in a formula, has high glass state temperature, is favorable for releasing elasticity and toughness of matched resin, has permeability and is favorable for improving adhesive force. Provides good construction property and leveling property for PU coating.
The photoinitiator is a special photoinitiator for LED-UV, and is a mixture of two or more of isoradical initiators, and the photoinitiator is; 2-hydroxy-2-methyl-phenyl acetone (1173), 1-hydroxy-2-cyclohexyl benzophenone (184), 2, 4, 6 trimethylbenzoyl-diphenyl phosphine oxide (TPO), bis (2, 4, 6 trimethylbenzoyl) -phenyl phosphine oxide (819) 2, 4, 6 trimethylbenzoyl-phenyl phosphine oxide (TEPO). The special light initiator for the LED-UV can be prepared from commercial products, such as 27 series products in Tianjin.
The above adhesion promoter; the adhesion promoter can be a commercially available product, such as CD-9051 from Saedoma.
The talcum powder has the function of improving the filling property and fullness of the paint, and the invention can be realized by any commonly-used commercially-available UV talcum powder, such as Longsheng 800 meshes and 1250 meshes.
The talc powder is prevented from settling, and the present invention can be carried out by using any commonly available UV anti-settling agent, such as Degussa M-5, or A-200.
The function of the dispersant is as follows: in order to disperse powder materials, prevent sedimentation and flocculation of particles, and prevent flooding and blooming.
The process method of the LED-UV cured elastic veneer system coating comprises the following steps; the method comprises the steps of wood veneer, 1 time of forward and reverse roller coating of LED-UV elastic putty, LED-UV curing, 2 times of forward and reverse roller coating of LED-UV elastic putty, LED-UV curing, 1 time of forward and reverse roller coating of LED-UV elastic sanding bottom, LED-UV cured sand sanding, PU coating and finishing.
Compared with the prior art, the invention has the following beneficial effects:
1 the high temperature resistant solvent-resistant, high elasticity and toughness high molecular weight elastic polyurethane used in the invention is finally converted into veneer with high elasticity, high kneading toughness, high temperature resistance and solvent resistance;
2 the invention uses adhesion promoter; the paint is one of special resin capable of enhancing the adhesive force, and further enhances the adhesive force of the paint to the wood veneer;
3, the monomer used in the invention contains hydroxyethyl methacrylate (HEMA) and acrylyl maleimide (ACMO), and has lower stimulation, higher elasticity, high kneading toughness, high temperature resistance and solvent resistance compared with the original common UV curing;
4, the invention uses LED-UV curing, and uses a special light initiator for LED-UV curing compared with the prior common UV curing; the ultraviolet light generated by the light source concentrates on a specific wavelength, has good coating penetrating power and ensures the complete curing of dark wood veneer. 2, LED-UV curing equipment is adopted, so that the heating is low in the production process, and the thermal damage to the surface of the veneer is avoided. In conclusion, the veneer obtained by LED-UV curing can be widely applied to processing of various veneers.
Example 1
The preparation formula of the LED-UV cured elastic putty coating comprises the following components in percentage by weight:
50 percent of elastic polyurethane
10 percent of modified epoxy resin
Special monomer 30%
Photoinitiator 6%
0.3 percent of flatting agent
0.3 percent of defoaming agent
3 percent of adhesion promoter
The preparation formula of the LED-UV cured elastic sanding primer comprises the following components in percentage by weight:
40 percent of elastic polyurethane
10 percent of modified epoxy resin
Special monomer 25%
Photoinitiator 6%
0.3 percent of flatting agent
0.3 percent of defoaming agent
15 percent of talcum powder
0.5 percent of anti-settling agent
0.3 percent of dispersant.
Example 2
The preparation formula of the LED-UV cured elastic putty coating comprises the following components in percentage by weight:
55 percent of elastic polyurethane
10 percent of modified epoxy resin
Special monomer 22%
Photoinitiator 6%
0.3 percent of flatting agent
0.3 percent of defoaming agent
3 percent of adhesion promoter
The preparation formula of the LED-UV cured elastic sanding primer comprises the following components in percentage by weight:
42 percent of elastic polyurethane
12 percent of modified epoxy resin
Special monomer 26%
Photoinitiator 6%
0.3 percent of flatting agent
0.3 percent of defoaming agent
14 percent of talcum powder
0.5 percent of anti-settling agent
0.3 percent of dispersant.
Example 3
The preparation formula of the LED-UV cured elastic putty coating comprises the following components in percentage by weight:
54 percent of elastic polyurethane
11 percent of modified epoxy resin
Special monomer 24%
Photoinitiator 5%
0.3 percent of flatting agent
0.3 percent of defoaming agent
3 percent of adhesion promoter
The preparation formula of the LED-UV cured elastic sanding primer comprises the following components in percentage by weight
The components of each group are as follows:
42 percent of elastic polyurethane
12 percent of modified epoxy resin
Special monomer 26%
Photoinitiator 6%
0.3 percent of flatting agent
0.3 percent of defoaming agent
14 percent of talcum powder
0.5 percent of anti-settling agent
0.3 percent of dispersant.
The LED-UV cured elastic coating veneer obtained in the embodiment is subjected to performance measurement;
national standard for detecting the order of an item Results
Attachment GB/15036.2-2001 Level 0
180 degree bend test More than 100 times
Solvent wiping of benzyl, butyl ester Butanone over 100 times
Veneer 150-degree pressing paste No bubbling and cracking
Cold-hot circulation GB10592-89 4 cycles without exception
Back of wood burning skin of fire-resistant lighter The carbonization does not bubble and fall off.
As can be seen from the above table, the veneer after being processed by LED-UV curing has the sense of reality of natural veneer, and compared with the traditional process effect, the paint film has good elasticity, the veneer is more flexible, can resist the back carbonization of a 1-DEG high-temperature lighter without blister, and can not crack when being folded at 180 DEG. The PU finishing coat can be well coated on the surface. The LED-UV coating has the advantages of environmental protection, high efficiency, high quality, wide application and the like, becomes the most concerned novel veneer coating, and has great development prospect. The production benefit is improved.
The embodiments of the present invention are described as preferred embodiments, and not intended to limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention. The present invention claims protection technology. Are described in the claims.

Claims (6)

1. The invention provides a special heat-resistant and solvent-resistant veneer LED-UV (light emitting diode) -cured elastic coating system and a preparation and coating method thereof.
2. The LED-UV curing elastic coating system special for the veneer, which is heat-resistant and solvent-resistant, and the preparation and coating methods of the LED-UV curing elastic coating system special for the veneer, as well as the preparation and coating methods of the LED-UV curing elastic putty for the veneer, are characterized in that the LED-UV curing elastic sanding sole formula for the veneer comprises the following components in percentage by mass:
the elastic putty comprises the following components in percentage by mass:
50-60% of elastic polyurethane
5 to 10 percent of modified epoxy resin
20 to 30 percent of special monomer
4 to 6 percent of photoinitiator
3 to 5 percent of adhesion promoter
0.1 to 0.3 percent of flatting agent
0.1 to 0.3 percent of defoaming agent
(2) The formula material of the veneer LED-UV cured elastic sanding sole comprises the following components in percentage by mass:
30-40% of elastic polyurethane
5 to 10 percent of modified epoxy resin
20 to 30 percent of special monomer
4 to 6 percent of photoinitiator
3 to 5 percent of adhesion promoter
0.1 to 0.3 percent of flatting agent
0.1 to 0.3 percent of defoaming agent
10 to 15 percent of talcum powder
0.5 percent of anti-settling agent.
3. The heat-resistant and solvent-resistant LED-UV cured elastic coating for wood veneer, as claimed in claim 1, is characterized by comprising a wood veneer LED-UV cured elastic putty and a preparation method of a wood veneer LED-UV cured elastic sanding sole;
the preparation method of the elastic putty for wood veneer LED-UV curing comprises the following steps: heating elastic polyurethane, modified epoxy resin and special monomer to 60-80 deg.c and setting inside reactor; dispersing for 1 hour at the stirring speed of 800-; adding a photoinitiator, a leveling agent and a defoaming agent, completely dissolving, adding an adhesion promoter, and dispersing for 1 hour to obtain LED-UV cured elastic putty;
(2) the preparation method of the veneer LED-UV cured elastic sanding sole comprises the following steps: heating elastic polyurethane, modified epoxy resin and special monomer to 60-80 deg.c and setting inside reactor; dispersing for 1 hour at the stirring speed of 800-; adding photoinitiator, flatting agent, defoaming agent, dispersant and talcum powder, completely dissolving, and finally adding adhesion promoter and anti-settling agent; the LED-UV cured elastic sanding sole can be obtained after 1 hour of dispersion.
4. An LED-UV curable elastomeric coating according to claim 1, wherein said reactive monomers are selected from the group consisting of hydroxyethyl methacrylate (HEMA), acrylyl maleimide (ACMO), and hydroxapropyl acrylate.
5. The heat-resistant and solvent-resistant LED-UV curing elastic coating system special for wood veneers and the preparation and coating method thereof as claimed in claim 1 are characterized in that the special LED-UV photoinitiator is a mixture of two or more of isoradical initiators, and specifically comprises the following steps: 2-hydroxy-2-methyl-phenyl acetone (1173), 1-hydroxy-2-cyclohexyl benzophenone (184), 2, 4, 6 trimethylbenzoyl-diphenyl phosphine oxide (TPO), bis (2, 4, 6 trimethylbenzoyl) -phenyl phosphine oxide (819).
6. The LED-UV curing elastic coating system special for the veneer, which is disclosed in claim 1 and the preparation and coating methods thereof are characterized in that a roller coating process special for the veneer is as follows: the method comprises the steps of wood veneer, 1 time of forward and reverse roller coating of LED-UV elastic putty, LED-UV curing, 2 times of forward and reverse roller coating of LED-UV elastic putty, LED-UV curing, 1 time of forward and reverse roller coating of LED-UV elastic sanding bottom, LED-UV cured sand sanding, PU coating and finishing.
CN202011316217.5A 2020-11-22 2020-11-22 Special heat-resistant solvent-resistant LED-UV (light-emitting diode-ultraviolet) curing elastic coating system for wood veneer and preparation and coating methods Pending CN112266715A (en)

Priority Applications (1)

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CN202011316217.5A CN112266715A (en) 2020-11-22 2020-11-22 Special heat-resistant solvent-resistant LED-UV (light-emitting diode-ultraviolet) curing elastic coating system for wood veneer and preparation and coating methods

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Application Number Priority Date Filing Date Title
CN202011316217.5A CN112266715A (en) 2020-11-22 2020-11-22 Special heat-resistant solvent-resistant LED-UV (light-emitting diode-ultraviolet) curing elastic coating system for wood veneer and preparation and coating methods

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104927517A (en) * 2015-05-31 2015-09-23 湖南省金海科技有限公司 Heat-resistant and solvent-resistant elastic UV (ultraviolet) coating system for wood veneer and preparation and coating methods
CN104946092A (en) * 2015-05-31 2015-09-30 湖南省金海科技有限公司 Mute cork composite floor ultraviolet light solidification coating system
CN105733389A (en) * 2016-04-13 2016-07-06 湖南省金海科技有限公司 LED-UV-cured transfer printing adhesive and preparation method thereof
CN110437731A (en) * 2019-08-27 2019-11-12 浙江佑泰新材料科技有限公司 A kind of UV-LED photocuring vacuum coating bottom coating and preparation method thereof
CN111690295A (en) * 2020-06-28 2020-09-22 北京大华博科智能科技有限公司 Insulation structure ink for 3D ink-jet printed circuit board and application thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104927517A (en) * 2015-05-31 2015-09-23 湖南省金海科技有限公司 Heat-resistant and solvent-resistant elastic UV (ultraviolet) coating system for wood veneer and preparation and coating methods
CN104946092A (en) * 2015-05-31 2015-09-30 湖南省金海科技有限公司 Mute cork composite floor ultraviolet light solidification coating system
CN105733389A (en) * 2016-04-13 2016-07-06 湖南省金海科技有限公司 LED-UV-cured transfer printing adhesive and preparation method thereof
CN110437731A (en) * 2019-08-27 2019-11-12 浙江佑泰新材料科技有限公司 A kind of UV-LED photocuring vacuum coating bottom coating and preparation method thereof
CN111690295A (en) * 2020-06-28 2020-09-22 北京大华博科智能科技有限公司 Insulation structure ink for 3D ink-jet printed circuit board and application thereof

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