CN108997831B - Insulating ink, preparation method and preparation method of insulating shielding case - Google Patents
Insulating ink, preparation method and preparation method of insulating shielding case Download PDFInfo
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- CN108997831B CN108997831B CN201810864845.3A CN201810864845A CN108997831B CN 108997831 B CN108997831 B CN 108997831B CN 201810864845 A CN201810864845 A CN 201810864845A CN 108997831 B CN108997831 B CN 108997831B
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- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
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- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/108—Hydrocarbon resins
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Abstract
The invention relates to the technical field of insulating ink, in particular to insulating ink, a preparation method and a preparation method of an insulating shielding case, wherein the insulating ink comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 2-3: 1; the component A comprises the following raw materials in parts by weight: 65-80 parts of epoxy resin, 55-65 parts of organic silicon resin, 20-35 parts of crosslinked polyethylene, 40-45 parts of composite anhydride, 8-12 parts of pigment, 12-15 parts of anti-settling agent, 15-20 parts of flatting agent and 30-50 parts of solvent; the component B comprises the following raw materials in parts by weight: 50-65 parts of epoxy resin amine curing agent and 8-15 parts of accelerator, and has excellent insulating property, high cold resistance and heat resistance, good adhesion property of a cured paint film, first-grade adhesion, short curing time of the paint film and low curing temperature.
Description
Technical Field
The invention relates to the technical field of insulating ink, in particular to insulating ink, a preparation method and a preparation method of an insulating shielding case.
Background
The shielding cover is a tool for shielding the influence of external electromagnetic waves on an internal circuit and the outward radiation of the electromagnetic waves generated inside, and is mainly applied to the fields of mobile phones, GPS and the like. The shielding case is made of stainless steel with a thickness of 0.2mm and copper white, wherein the copper white is not only a metal shielding material which is easy to be tinned, but also has a certain conductivity, and the shielding case made of copper white may be electrically connected with an electronic element or a PCB board, which may cause an open circuit of the electronic element or a short circuit of the PCB board, and affect the normal and stable operation of the electronic product.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the first object of the invention is to provide an insulating ink which has excellent insulating property, high cold resistance and heat resistance, good adhesion property of a cured paint film, first-order adhesion, short curing time of the paint film and low curing temperature.
The second purpose of the invention is to provide a preparation method of the insulating ink, which has the advantages of simple preparation steps, convenient control, excellent insulating property of the prepared insulating ink, good film-forming property, short curing time and low curing temperature, and can effectively improve the production efficiency and reduce the production energy consumption.
The third purpose of the invention is to provide a preparation method of the insulation shielding case, which has high preparation efficiency and yield and excellent insulation performance.
The first purpose of the invention is realized by the following technical scheme: an insulating ink comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 2-3: 1;
the component A comprises the following raw materials in parts by weight: 65-80 parts of epoxy resin, 55-65 parts of organic silicon resin, 20-35 parts of cross-linked polyethylene resin, 40-45 parts of composite anhydride, 8-12 parts of pigment, 12-15 parts of anti-settling agent, 15-20 parts of flatting agent and 30-50 parts of solvent;
the component B comprises the following raw materials in parts by weight: 50-65 parts of epoxy resin amine curing agent and 8-15 parts of accelerator.
According to the invention, the component A and the component B are compounded, so that the prepared insulating ink has excellent insulating property, high cold resistance and heat resistance, the adhesion property of a cured paint film is good, the adhesion reaches one level, the curing time of the paint film is short, and the curing temperature is low.
The epoxy resin is modified by the organic silicon resin and the composite anhydride, and the modified epoxy resin system has the excellent performances of the epoxy resin and the organic silicon resin, so that the internal stress of the epoxy resin can be reduced, the toughness, the heat resistance and the cold resistance of the epoxy resin system can be improved, the water resistance, the solvent resistance and the like can be improved, and the high adhesion performance and the insulating performance of the epoxy resin can be realized; the modified epoxy resin system is polymerized with the crosslinked polyethylene resin with excellent electric insulation effect and large current-carrying capacity, and the electric insulation effect and the load capacity of the composite resin system can be effectively improved.
By adding the composite anhydride, not only can a molecular chain with toughness be introduced into the anhydride molecular chain, but also the crosslinking density of the epoxy resin can be increased, the insulating property of the composite resin system is improved, the curing time of the composite resin system is effectively reduced, and the toughness and the glossiness of a cured paint film are improved. Tests show that when the content of the composite anhydride is too high, the insulating ink can be dried too fast, so that the storage period of the insulating ink is greatly shortened, and the use process is influenced; when the content of the composite anhydride is too low, the insulating ink has poor leveling property, long curing time, high curing temperature and reduced insulating property.
By adding the epoxy resin amine curing agent and the accelerator in parts by weight for compounding and performing synergistic action with the composite anhydride, a cured paint film has excellent insulating property, good glossiness, no whitening phenomenon, high toughness and good adhesion property, and the insulating ink can be cured in a normal-temperature environment and has low curing temperature.
Preferably, the accelerant is any one of LD-127, LD-137, FZJ-169 and N822W. The addition of the accelerant can effectively improve the adhesive force of the insulating ink and prolong the service life of the cured paint layer.
The invention is further configured to: the solvent is at least one of butanone, absolute ethyl alcohol, acetone, toluene, butanol and ethyl acetate.
The composite resin system is mixed with the solvent in parts by weight to prepare the insulating ink with proper viscosity, the viscosity of the prepared insulating ink is 400-plus 500mPa & s, the construction performance is good, the paint build-up phenomenon is not easy to occur, meanwhile, the film forming performance of the prepared insulating ink is excellent, all raw material components are uniformly and stably dispersed in the composite resin system, the stability, the weather resistance and the mechanical performance of the insulating ink are improved, a paint layer after film forming has excellent insulating performance and high adhesive force, and the insulating ink with stable property is more favorable for storage.
The invention is further configured to: the preparation method of the epoxy resin amine curing agent comprises the following steps: according to the weight portion, 45-50 portions of polyamine, 9-15 portions of epoxy resin, 3-5 portions of catalyst and 55-65 portions of solvent are mixed, stirred, introduced with nitrogen, heated to boiling and reacted for 1-2.5 hours to obtain the epoxy resin amine curing agent.
Wherein the polyamine is 3,3' -dichloro-4, 4' -diaminodiphenylmethane or propylene glycol bis- (4, 4' -diamino) benzoate, and the catalyst is any one of eugenol, phenol, thymol and cresol.
The preparation method is simple to operate and high in preparation efficiency, the prepared epoxy resin amine curing agent is excellent in curing performance, the insulating performance, the heat resistance, the cold resistance and the adhesion performance of a cured paint film are improved, the toughness of the cured paint film is good, and the whitening phenomenon is avoided.
When the content of the added polyamine is too high, a paint layer of the cured insulating ink is brittle and is easy to whiten, the adhesive force and the insulating property of the insulating ink are reduced, and when the content of the polyamine is too low, the prepared epoxy resin amine curing agent is in a gel state and cannot be mutually dissolved with the composite resin in the component A, so that the insulating property of the insulating ink is influenced, and the insulating ink is difficult to cure to form a film.
The invention is further configured to: the anti-settling agent is at least one of organic bentonite, silicon dioxide aerogel, hydrogenated castor oil, aluminum stearate and polyethylene wax.
The anti-settling agent can effectively improve the suspension performance of the pigment in the insulating ink, so that the components in the insulating ink are dispersed more uniformly and stably, the phenomenon of settling and layering is not easy to occur, the storage period of the insulating ink is effectively prolonged, and meanwhile, the viscosity of the insulating ink is adjusted, so that the prepared insulating ink has better construction performance.
The invention is further configured to: the leveling agent is at least one of a polyether modified organic siloxane leveling agent, a polydimethylsiloxane leveling agent, an organic silicon modified polysiloxane leveling agent and an organic modified polysiloxane acrylic leveling agent.
The flatting agent has good suspension stability, good adhesive force, high transparency and no influence on the surface gloss of a paint film, can improve the compatibility of a composite resin system, enables the prepared insulating ink to have uniform and stable properties, is not easy to generate the layering phenomenon, can reduce the surface tension of the composite resin system, controls the surface flow capacity of the insulating ink, enables the prepared insulating ink to have good shrinkage resistance and adhesion resistance, and improves the interlayer adhesive force of the insulating ink. Preferably, the polyether modified organic siloxane leveling agent can be a 1080 leveling agent, a 1090 leveling agent, a 1070 leveling agent and a 1071 leveling agent; the organic silicon modified polysiloxane flatting agent can be selected from 1060 flatting agents, and has good heat resistance, and the heat resistance temperature is 200-; the organic modified polysiloxane acrylic flatting agent can be selected from 1073 flatting agent and 1074 flatting agent.
The invention is further configured to: the composite anhydride is at least two of acetic anhydride, phthalic anhydride, trifluoroacetic anhydride, butyric anhydride and trimellitic anhydride.
The acid anhydride is adopted for compounding, the acid anhydride group reacts with hydroxyl in the composite resin system to generate carboxyl, the newly generated carboxyl further reacts with epoxy, and further the composite resin system is modified, so that the composite resin system has excellent insulating property and high toughness, the crosslinking density of the composite resin system is improved, and the adhesive force of the insulating ink is improved.
The second purpose of the invention is realized by the following technical scheme: the preparation method of an insulating ink, epoxy resin, organic silicon resin, cross-linked polyethylene, composite anhydride, pigment, anti-settling agent, flatting agent and solvent are mixed evenly, and mixed and ground to prepare component A; then, uniformly mixing the epoxy resin amine curing agent and the accelerator to prepare a component B; and finally, uniformly mixing the component A and the component B according to the weight ratio of 2-3: 1.
When the component A and the component B are mixed according to the weight ratio, the mixed insulating ink has excellent insulating property, good film-forming property, short curing time and low curing temperature, and can effectively improve the production efficiency and reduce the production energy consumption. When the weight ratio is too large, the insulating ink is difficult to cure, and the adhesion is reduced; when the weight ratio is too small, the insulation property is lowered, and the curing time is too fast, which may affect the construction process.
The invention is further configured to: when the component A is prepared, all the raw materials are mixed and ground to the fineness of 150-250 meshes.
Grinding the raw materials in the component A to the fineness is favorable for improving the uniform and stable performance of the insulating ink, so that the prepared insulating ink is not easy to generate a layering phenomenon, and the storage life of the insulating ink is prolonged; on the other hand, the component A with the fineness is beneficial to the color expression of the insulating ink pigment, so that the pigment is uniformly dispersed in the composite resin system, the color of the prepared insulating ink paint layer is more uniform, the glossiness of the paint layer is also beneficial to improvement, and the surface of the paint layer of the prepared insulating ink is smoother.
The third purpose of the invention is realized by the following technical scheme: a preparation method of an insulation shielding case, which uses the insulation ink or the insulation ink prepared by the preparation method of the insulation ink to print an insulation ink pattern on a metal material strip for manufacturing the insulation shielding case according to design requirements by a screen printing method so as to form an insulation layer, comprises the following steps:
s1, punching the metal material belt to be processed to form a positioning hole;
s2, manufacturing a silk screen printing plate matched with the positioning hole according to the unfolding shape of the insulating layer on the insulating shielding cover, and placing the silk screen printing plate into rotary silk screen printing equipment;
s3, positioning the punched metal material belt to a printing position of a rotary screen printing device through a positioning hole;
s4, adding insulating ink onto the silk-screen printing plate to print the metal material belt conveyed to a printing position;
s5, conveying the printed metal material belt to curing equipment for curing;
and S6, feeding the metal material belt solidified in the S5 into a stamping device, and performing stamping forming to obtain the insulating shielding case.
Wherein the curing equipment is ultraviolet curing equipment or infrared curing equipment.
The preparation method is simple, the metal material belt is subjected to insulation processing before being stamped, so that an insulating film does not need to be manually laminated after stamping forming, the production cost and the labor intensity of workers are greatly reduced, the manual film lamination of equipment is replaced by the silk screen printing mode, and the yield of the insulating shielding case is improved. The insulating layer of the shielding case is prepared in a screen printing mode, compared with a mode of film pasting, the production efficiency and the yield are high, the thickness of the insulating layer can be effectively reduced, and the normal use of electronic elements in the shielding case is not affected.
The invention has the beneficial effects that:
1. the preparation method of the insulating ink has the advantages of simple preparation steps, convenient control, excellent insulating property, good film-forming property, short curing time and low curing temperature, and can effectively improve the production efficiency and reduce the production energy consumption.
2. The insulation shielding case prepared by the insulation ink has the electrical strength of between 102 KV/mm and 105KV/mm and the volume resistivity of 3.56X1013-5.62x1013Omega cm, surface resistivity of 5.38x1013-5.94x1013And the insulating property is excellent between omega, the adhesive force of the insulating layer on the surface of the shielding case can reach one level, the flexibility is good, and the flexibility test is between 6 and 8 mm.
3. According to the invention, the insulating ink is printed on the metal material belt by adopting a screen printing method to prepare the insulating shielding case, compared with a film pasting mode, the production efficiency and the yield are higher, the thickness of the insulating layer can be effectively reduced, and the normal use of electronic elements in the shielding case is not influenced.
Drawings
Fig. 1 is a schematic diagram of the present invention that insulating ink is printed on a metal tape for making an insulating shielding case.
In the figure: 1. a metal material belt; 2. an insulating layer; 3. and (7) positioning the holes.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and the accompanying fig. 1, and the description of the embodiments is not intended to limit the present invention.
Example 1
An insulating ink comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 2: 1;
the component A comprises the following raw materials in parts by weight: 65 parts of epoxy resin, 55 parts of organic silicon resin, 20 parts of crosslinked polyethylene, 40 parts of composite anhydride, 8 parts of pigment, 12 parts of organic bentonite anti-settling agent, 15 parts of 1080 flatting agent and 30 parts of butanone solvent;
the component B comprises the following raw materials in parts by weight: 50 parts of epoxy resin amine curing agent and 8 parts of LD-127 accelerator.
Wherein the composite anhydride is a mixture of acetic anhydride and phthalic anhydride in a weight ratio of 1: 1.
The preparation method of the epoxy resin amine curing agent comprises the following steps: according to the weight portion, 45 portions of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, 9 portions of epoxy resin, 3 portions of eugenol catalyst and 55 portions of butanone solvent are mixed, stirred, introduced with nitrogen, heated to boiling, and reacted for 1 hour to obtain the epoxy resin amine curing agent.
The preparation method of the insulating ink comprises the steps of firstly, uniformly mixing the epoxy resin, the organic silicon resin, the crosslinked polyethylene, the composite anhydride, the pigment, the organic bentonite anti-settling agent, the 1080 flatting agent and the butanone solvent in parts by weight, and mixing and grinding the mixture until the fineness is 150 meshes to prepare a component A; then, uniformly mixing the epoxy resin amine curing agent and the LD-127 accelerant to prepare a component B; and finally, uniformly mixing the component A and the component B according to the weight ratio of 2: 1.
The preparation method of the insulation shielding case, which is used for printing insulation ink patterns on a metal material belt 1 for manufacturing the insulation shielding case by adopting a screen printing method according to design requirements to form an insulation layer 2, comprises the following steps:
s1, punching the metal material belt 1 to be processed to form a positioning hole 3;
s2, manufacturing a silk screen printing plate matched with the positioning hole 3 according to the unfolded shape of the insulating layer 2 on the insulating shielding cover, and placing the silk screen printing plate into rotary silk screen printing equipment;
s3, positioning the punched metal material belt 1 to a printing position of a rotary screen printing device through a positioning hole 3;
s4, adding insulating ink on the silk screen printing plate to print the metal material belt 1 conveyed to a printing position;
s5, conveying the printed metal material belt 1 to ultraviolet curing equipment for curing;
and S6, feeding the metal material strap 1 solidified in the S5 into a stamping device, and performing stamping forming to obtain the insulation shielding cover.
Example 2
An insulating ink comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 2.5: 1;
the component A comprises the following raw materials in parts by weight: 72.5 parts of epoxy resin, 60 parts of organic silicon resin, 27.5 parts of crosslinked polyethylene, 42.5 parts of composite anhydride, 10 parts of pigment, 13.5 parts of silica aerogel anti-settling agent, 17.5 parts of 1060 leveling agent and 40 parts of absolute ethyl alcohol solvent;
the component B comprises the following raw materials in parts by weight: 57.5 parts of epoxy resin amine curing agent and 11.5 parts of LD-137 accelerator.
Wherein the composite anhydride is phthalic anhydride, trifluoroacetic anhydride and butyric anhydride in a weight ratio of 1:1, in a mixture of the components.
The preparation method of the epoxy resin amine curing agent comprises the following steps: according to the weight portion, 47.5 portions of propylene glycol bis- (4, 4' -diamino) benzoate, 12 portions of epoxy resin, 4 portions of phenol catalyst and 60 portions of absolute ethyl alcohol solvent are mixed, stirred, introduced with nitrogen, heated to boiling, and reacted for 1.75 hours to obtain the epoxy resin amine curing agent.
The preparation method of the insulating ink comprises the steps of firstly, uniformly mixing the epoxy resin, the organic silicon resin, the crosslinked polyethylene, the composite anhydride, the pigment, the silica aerogel anti-settling agent, the 1060 leveling agent and the absolute ethyl alcohol solvent in parts by weight, and mixing and grinding the mixture until the fineness is 200 meshes to prepare a component A; then, uniformly mixing the epoxy resin amine curing agent and the LD-137 accelerant to prepare a component B; and finally, uniformly mixing the component A and the component B according to the weight ratio of 2.5: 1.
The preparation method of the insulation shielding case, which is used for printing insulation ink patterns on a metal material belt 1 for manufacturing the insulation shielding case by adopting a screen printing method according to design requirements to form an insulation layer 2, comprises the following steps:
s1, punching the metal material belt 1 to be processed to form a positioning hole 3;
s2, manufacturing a silk screen printing plate matched with the positioning hole 3 according to the unfolded shape of the insulating layer 2 on the insulating shielding cover, and placing the silk screen printing plate into rotary silk screen printing equipment;
s3, positioning the punched metal material belt 1 to a printing position of a rotary screen printing device through a positioning hole 3;
s4, adding insulating ink on the silk screen printing plate to print the metal material belt 1 conveyed to a printing position;
s5, conveying the printed metal material belt 1 to infrared curing equipment for curing;
and S6, feeding the metal material strap 1 solidified in the S5 into a stamping device, and performing stamping forming to obtain the insulation shielding cover.
Example 3
An insulating ink comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 3: 1;
the component A comprises the following raw materials in parts by weight: 80 parts of epoxy resin, 65 parts of organic silicon resin, 35 parts of crosslinked polyethylene, 45 parts of composite anhydride, 12 parts of pigment, 15 parts of anti-settling agent, 20 parts of flatting agent and 50 parts of solvent;
the component B comprises the following raw materials in parts by weight: 65 parts of epoxy resin amine curing agent and 15 parts of FZJ-169 accelerator.
Wherein the solvent is a mixed solvent composed of acetone and toluene according to the weight ratio of 2.5: 1; the anti-precipitation agent is a mixture of hydrogenated castor oil and aluminum stearate in a weight ratio of 1.5: 2; the flatting agent is 1090 flatting agent, 1060 flatting agent by weight ratio as 1: 1; the composite anhydride is a mixture of trifluoroacetic anhydride, butyric anhydride and trimellitic anhydride in a weight ratio of 1:1: 1.
The preparation method of the epoxy resin amine curing agent comprises the following steps: according to the weight portion, 50 portions of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, 15 portions of epoxy resin, 5 portions of thymol catalyst and 65 portions of solvent are mixed, stirred, introduced with nitrogen, heated to boiling, and reacted for 2.5 hours to obtain the epoxy resin amine curing agent.
The preparation method of the insulating ink comprises the steps of firstly, uniformly mixing the epoxy resin, the organic silicon resin, the crosslinked polyethylene, the composite anhydride, the pigment, the anti-settling agent, the flatting agent and the solvent in parts by weight, and mixing and grinding the mixture until the fineness is 250 meshes to prepare a component A; then, uniformly mixing the epoxy resin amine curing agent and FZJ-169 accelerant to prepare a component B; and finally, uniformly mixing the component A and the component B according to the weight ratio of 3: 1.
The preparation method of the insulation shielding case, which is used for printing insulation ink patterns on a metal material belt 1 for manufacturing the insulation shielding case by adopting a screen printing method according to design requirements to form an insulation layer 2, comprises the following steps:
s1, punching the metal material belt 1 to be processed to form a positioning hole 3;
s2, manufacturing a silk screen printing plate matched with the positioning hole 3 according to the unfolded shape of the insulating layer 2 on the insulating shielding cover, and placing the silk screen printing plate into rotary silk screen printing equipment;
s3, positioning the punched metal material belt 1 to a printing position of a rotary screen printing device through a positioning hole 3;
s4, adding insulating ink on the silk screen printing plate to print the metal material belt 1 conveyed to a printing position;
s5, conveying the printed metal material belt 1 to ultraviolet curing equipment for curing;
and S6, feeding the metal material strap 1 solidified in the S5 into a stamping device, and performing stamping forming to obtain the insulation shielding cover.
The insulation shield cases obtained in examples 1 to 3 were subjected to the following performance tests.
1. Insulation performance test
The electrical strength, volume resistivity and surface resistivity of the insulation shield were determined according to methods of HG/T3330-2012 and GB/T1410-2006.
2. Mechanical testing of the insulating layer 2 on the insulating shield
The adhesion test was carried out on the insulating layer 2 according to the method of GB/T9286-1989.
The insulating layer 2 was tested for flexibility according to the method of GB/T1731-93.
The test results are recorded in table 1.
Table 1 summary of the performance test results for the insulation shields made in examples 1-3
As shown in Table 1, the electrical strength and volume resistivity of the insulation shield manufactured by the invention are 102-105KV/mm and 3.56x10 respectively13-5.62x1013Ω·cm, surface resistivity of 5.38x1013-5.94x1013And the insulating property is excellent between omega, the adhesive force of the insulating layer 2 on the surface of the shielding case can reach one level, the flexibility is good, and the flexibility test is between 6 and 8 mm.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (7)
1. The insulating ink is characterized by comprising a component A and a component B, wherein the weight ratio of the component A to the component B is 2-3: 1;
the component A comprises the following raw materials in parts by weight: 65-80 parts of epoxy resin, 55-65 parts of organic silicon resin, 20-35 parts of crosslinked polyethylene, 40-45 parts of composite anhydride, 8-12 parts of pigment, 12-15 parts of anti-settling agent, 15-20 parts of flatting agent and 30-50 parts of solvent;
the component B comprises the following raw materials in parts by weight: 50-65 parts of epoxy resin amine curing agent and 8-15 parts of accelerator;
the solvent is at least one of butanone, absolute ethyl alcohol, acetone, toluene, butanol and ethyl acetate;
the preparation method of the epoxy resin amine curing agent comprises the following steps: according to the weight portion, 45-50 portions of polyamine, 9-15 portions of epoxy resin, 3-5 portions of catalyst and 55-65 portions of solvent are mixed, stirred, introduced with nitrogen, heated to boiling and reacted for 1-2.5 hours to obtain epoxy resin amine curing agent;
the polyamine is 3,3' -dichloro-4, 4' -diaminodiphenylmethane or propylene glycol bis- (4, 4' -diamino) benzoate, and the catalyst is any one of eugenol, phenol, thymol and cresol.
2. The insulating ink according to claim 1, wherein the anti-settling agent is at least one of an organobentonite, a silica aerogel, a hydrogenated castor oil, aluminum stearate, and a polyethylene wax.
3. The insulating ink according to claim 1, wherein the leveling agent is at least one of a polyether-modified organosiloxane leveling agent, a polydimethylsiloxane leveling agent, an organosilicon-modified polysiloxane leveling agent, and an organic-modified polysiloxane acrylic leveling agent.
4. The insulating ink according to claim 1, wherein the complex acid anhydride is at least two of acetic anhydride, phthalic anhydride, trifluoroacetic anhydride, butyric anhydride, and trimellitic anhydride.
5. A preparation method of the insulating ink as claimed in claims 1 to 4, characterized in that the epoxy resin, the organic silicon resin, the cross-linked polyethylene, the composite anhydride, the pigment, the anti-settling agent, the leveling agent and the solvent are mixed uniformly, and then are mixed and ground to prepare the component A; then, uniformly mixing the epoxy resin amine curing agent and the accelerator to prepare a component B; and finally, uniformly mixing the component A and the component B according to the weight ratio of 2-3: 1.
6. The method for preparing the insulating ink as claimed in claim 5, wherein the component A is prepared by mixing the raw materials and grinding the mixture to a fineness of 150-250 mesh.
7. A method for manufacturing an insulation shield case by printing an insulation ink pattern on a metal tape for manufacturing an insulation shield case by a screen printing method according to design requirements using the insulation ink according to any one of claims 1 to 4 or the insulation ink manufactured by the method for manufacturing an insulation ink according to any one of claims 5 to 6 to form an insulation layer, comprising the steps of:
s1, punching the metal material belt to be processed to form a positioning hole;
s2, manufacturing a silk screen printing plate matched with the positioning hole according to the unfolding shape of the insulating layer on the insulating shielding cover, and placing the silk screen printing plate into rotary silk screen printing equipment;
s3, positioning the punched metal material belt to a printing position of a rotary screen printing device through a positioning hole;
s4, adding insulating ink onto the silk-screen printing plate to print the metal material belt conveyed to a printing position;
s5, conveying the printed metal material belt to curing equipment for curing;
and S6, feeding the metal material belt solidified in the S5 into a stamping device, and performing stamping forming to obtain the insulating shielding case.
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| CN201810864845.3A CN108997831B (en) | 2018-08-01 | 2018-08-01 | Insulating ink, preparation method and preparation method of insulating shielding case |
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| CN112389046B (en) * | 2020-11-17 | 2024-07-26 | 广东和润新材料股份有限公司 | Processing technology of double-layer film material belt with film pasting and film plating |
| CN112457706A (en) * | 2020-11-23 | 2021-03-09 | 宁波恒浩广新型电子材料有限公司 | Heat dissipation ink, preparation method and preparation method of heat dissipation shielding case |
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| CN101525467A (en) * | 2009-04-03 | 2009-09-09 | 复旦大学 | Epoxy/organosilicon hybrid material, and preparation method and application thereof |
| CN104125763A (en) * | 2014-07-08 | 2014-10-29 | 广东和润精密五金材料股份有限公司 | Manufacturing method for electronic product insulation shielding covers |
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| CN101525467A (en) * | 2009-04-03 | 2009-09-09 | 复旦大学 | Epoxy/organosilicon hybrid material, and preparation method and application thereof |
| CN104125763A (en) * | 2014-07-08 | 2014-10-29 | 广东和润精密五金材料股份有限公司 | Manufacturing method for electronic product insulation shielding covers |
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| 环氧树脂胺类固化剂的改性;肖卫东等;《胶体与聚合物》;20010625;第19卷(第2期);第27页 * |
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