CN110845908A - Black printing ink for mobile phone explosion-proof membrane back plate - Google Patents
Black printing ink for mobile phone explosion-proof membrane back plate Download PDFInfo
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- CN110845908A CN110845908A CN201910981992.3A CN201910981992A CN110845908A CN 110845908 A CN110845908 A CN 110845908A CN 201910981992 A CN201910981992 A CN 201910981992A CN 110845908 A CN110845908 A CN 110845908A
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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
- C09D11/104—Polyesters
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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
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
Abstract
The invention discloses black printing ink for a mobile phone explosion-proof membrane back plate, which belongs to the technical field of printing ink and is prepared from the following raw materials: polyester resin solution, organic silicon modified polyester resin solution, organic solvent, dispersant, carbon black, iron oxide black, filler and auxiliary agent; the raw materials are taken out according to a proportion and prepared according to the steps, the dispersing agent can be fully contacted with the carbon black and anchored on the surface of carbon black molecules, the carbon black can be fully and uniformly wrapped in a resin system, the carbon black molecules are separated by the dispersing agent, the storage stability is effectively improved, the generation of printing pinholes can be greatly reduced, and the problem of difficult filtration caused by the increase of viscosity after the ink is cooled can be solved by hot filtration, so that the high covering and high insulating property of the ink of the back plate of the mobile phone coexist, the water boiling resistance is met, the flexibility cannot be deteriorated, and the poor problems of cracking, wrinkling, brightening and the like are not easy to occur during hot bending.
Description
Technical Field
The invention relates to the technical field of printing ink, in particular to black printing ink for a backboard of an explosion-proof membrane of a mobile phone.
Background
The 3D composite board mobile phone backboard is a mobile phone backboard with a 3D effect, which is manufactured by cutting, precise instrument manufacturing, printing, hot bending forming and other processes of a PC + PMMA composite board, in the manufacturing process, precise texture manufacturing is a key of the competition of the composite board mobile phone backboard and a glass cover plate in vision, the composite board is subjected to 3D hot bending forming and is matched with a precise texture technology, the composite board and the 3D glass cover plate have a similar feeling in vision, and in addition, plastic textures, material hardening and other technologies are developed, the PMMA/PC composite board curved surface battery rear cover scheme is more and more the mainstream choice in the market, and the consumption of printing ink applied to the composite backboard is also increased with the water.
The patent proposes that bamboo charcoal is used for replacing insulating carbon black, but the patent still has the defects that the bamboo charcoal has poor covering property, the ideal shading effect can be achieved only by adding the bamboo charcoal to 300 percent of solid resin, and meanwhile, the printing performance problems of pinholes, light leakage and the like are caused.
Polyester resin, especially linear polyester resin has relatively balanced reaction speed and flexibility, but high temperature resistance and boiling resistance are relatively poor, in order to solve the problem, resin with a high hydroxyl value is usually selected to improve the crosslinking density of a system, so that the integral boiling resistance is improved, but the toughness is influenced, and the subsequent hot bending process is easy to cause poor ink cracking, wrinkling and the like, so that the black printing ink for the backboard of the anti-explosion film of the mobile phone is provided for solving the problem.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides black printing ink for a backboard of an explosion-proof membrane of a mobile phone.
In order to achieve the purpose, the invention adopts the following technical scheme:
the black printing ink for the back plate of the mobile phone rupture membrane is prepared from the following raw materials: the organic silicon modified polyester resin comprises a polyester resin solution, an organic silicon modified polyester resin solution, an organic solvent, a dispersing agent, carbon black, iron oxide black, a filler and an auxiliary agent, wherein the raw materials comprise the following components in percentage by weight:
polyester resin solution: 40-50 parts;
silicone modified polyester resin solution: 12-15 parts;
organic solvent: 10-16 parts;
dispersing agent: 8-10 parts;
carbon black: 14-18 parts;
black iron oxide: 7-9 parts;
filling: 3-5 parts;
auxiliary agent: 0.5-1 part.
Preferably, the polyester resin is a resin solution with solid content of 60% prepared by dissolving one or more of propylene glycol methyl ether acetate, 3-methoxy methyl propionate and ethylene glycol butyl ether acetate in solid state,
preferably, the organosilicon modified polyester resin is a resin solution with solid content of 40% and is dissolved by one or more of ethylene glycol diacetate dimethyl 2-methylglutarate and methyl 3-methoxypropionate as solid.
Preferably, the organic solvent is one or more of propylene glycol methyl ether acetate, 3-methoxy-3-methyl butyl acetate, ethylene glycol diacetate and 2-methyl dimethyl glutarate.
Preferably, the dispersant is a high molecular weight polyurethane-based dispersant.
Preferably, the primary particle diameter of the carbon black is 20 to 50nm, and the DBP oil absorption value of the carbon black is 80 to 120ml/100 g.
Preferably, the iron oxide black is ferroferric oxide.
Preferably, the filler is one or more of calcium carbonate, barium sulfate and talcum powder.
Preferably, the auxiliary agent is a mixture of a foam breaking polymer and silicone.
A preparation method of black printing ink for a backboard of an explosion-proof membrane of a mobile phone comprises the following steps:
a, putting an organic solvent, a dispersing agent, carbon black and iron oxide black into a mixing barrel, dispersing for 10min to be fully and uniformly by a dispersing machine at the dispersion efficiency of 700r/min, and soaking for 20 hours;
b, adding a polyester resin solution and an organic silicon modified polyester resin solution, dispersing for 20min by a dispersion machine at the dispersion efficiency of 700r/min until the mixture is in a uniform flowing state, and then transferring to a sand mill;
c, adjusting the rotating speed of the sand mill to 1200r/min, and the air pressure to be 0.3kPa, opening circulating cooling water at 15 ℃, and sanding for 5 times, wherein the specific times are determined according to the grinding efficiency of the sand mill until the fineness is 2 mu m;
d, adding filler and an auxiliary agent, dispersing for 20min to be fully uniform by a dispersion machine at the dispersion efficiency of 700r/min, and sanding once again;
e, binding 300-mesh filter cloth at a discharge port, filtering when the material temperature is about 62 ℃ and the viscosity is about 2500mPa.s to obtain the printing ink.
Compared with the prior art, the invention provides black printing ink for the mobile phone explosion-proof membrane back plate and a preparation method thereof, and the black printing ink has the following beneficial effects:
1. the black printing ink for the back plate of the mobile phone is prepared by taking out 10 parts of organic solvent, 8 parts of dispersing agent, 14 parts of carbon black and 7 parts of iron oxide black, putting the organic solvent, the dispersing agent, the carbon black and the iron oxide black into a mixing barrel, dispersing the organic solvent, the dispersing agent and the iron oxide black for 10min to be fully and uniformly dispersed by a dispersing machine at the dispersion efficiency of 700r/min, soaking the mixture for 20 hours to ensure that the dispersing agent can be fully contacted with the carbon black and anchored on the surface of carbon black molecules, so that the carbon black can be fully and uniformly wrapped in a resin system, the carbon black molecules are separated by the dispersing agent, the storage stability is effectively improved, the generation of printing pinholes can be greatly reduced, the organic solvent has the characteristics of strong solvent power, high boiling point, small taste and environmental protection, the solvent is favorable for discharging the solvent and drying the printing ink, the siloxane, the carbon black provides covering and blackness, the iron black is used for 'filling joints' so as to achieve the effect of uniform light transmission and no pinholes, 40 parts of polyester resin is added and dispersed for 20min by a dispersion machine with the dispersion efficiency of 700r/min until the mixture is in a uniform flowing state, then the mixture is transferred to a sand mill, the polyester resin is linear polyester, the preferred molecular weight of the linear polyester resin is 5000 plus 9000, a filler and an auxiliary agent are added, the mixture is dispersed for 20min to be fully and uniformly by the dispersion machine with the dispersion efficiency of 700r/min, and then the mixture is sanded once, the filler adopts calcium carbonate, has small particle size, is easy to disperse, has good transparency and high stability, can effectively improve the printing performance and the drying performance of the ink, 300-mesh filter cloth is bound at a discharge port, the material temperature is about 62 ℃, the viscosity is about 2500mPa.s, the printing ink for the composite back panel of the mobile phone is obtained by hot filtration, and the, other equipment such as vacuum filtration does not need to be added, the requirements of high insulativity and high covering are well met, the printing times of manufacturers are reduced, printing ink is saved, labor and time cost are saved, the boiling-resistant time of conventional printing ink is increased by 100%, the printing ink has more excellent flexibility, the material is bent for 180 degrees, the upper-layer printing ink cannot crack, wrinkle, shine and the like, the production process is optimized, the grinding efficiency can be greatly improved by soaking the pigment and adjusting the working parameters of the sand mill, the storage stability of the printing ink is improved, the high covering and high insulativity of the printing ink of the back plate of the mobile phone is enabled to coexist, after the boiling-resistant performance is met, the flexibility cannot deteriorate, and the poor problems of cracking, wrinkling, shining and the like cannot occur easily in hot bending are solved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all embodiments
Comparative example 1: a black printing ink for a backboard of an explosion-proof membrane of a mobile phone comprises the following raw materials: the organic silicon modified polyester resin comprises a polyester resin solution, an organic silicon modified polyester resin solution, an organic solvent, a dispersing agent, carbon black, a filler and an auxiliary agent, wherein the raw materials comprise the following components in percentage by weight:
polyester resin solution: 40 parts of a mixture;
silicone modified polyester resin solution: 12 parts of (1);
organic solvent: 10 parts of (A);
dispersing agent: 8 parts of a mixture;
carbon black: 15 parts of (1);
filling: 4 parts of a mixture;
auxiliary agent: 0.5 part;
the preparation method is normal.
Comparative example 2: a black printing ink for a backboard of an explosion-proof membrane of a mobile phone comprises the following raw materials: the organic silicon modified polyester resin comprises a polyester resin solution, an organic silicon modified polyester resin solution, an organic solvent, a dispersing agent, black iron oxide, a filler and an auxiliary agent, wherein the raw materials comprise the following components in percentage by weight:
polyester resin solution: 40 parts of a mixture;
silicone modified polyester resin solution: 12 parts of (1);
organic solvent: 10 parts of (A);
dispersing agent: 8 parts of a mixture;
black iron oxide: 9 parts of (1);
filling: 5 parts of a mixture;
auxiliary agent: 0.8 part;
the preparation method is normal.
Example 1:
a black printing ink for a backboard of an explosion-proof membrane of a mobile phone comprises the following raw materials: the organic silicon modified polyester resin comprises a polyester resin solution, an organic silicon modified polyester resin solution, an organic solvent, a dispersing agent, carbon black, iron oxide black, a filler and an auxiliary agent, wherein the raw materials comprise the following components in percentage by weight:
polyester resin solution: 45 parts of (1);
silicone modified polyester resin solution: 13 parts;
organic solvent: 12 parts of (1);
dispersing agent: 9 parts of (1);
carbon black: 15 parts of (1);
black iron oxide: 8 parts of a mixture;
filling: 4 parts of a mixture;
auxiliary agent: 0.8 part.
A preparation method of black printing ink for a backboard of an explosion-proof membrane of a mobile phone comprises the following steps:
a, putting an organic solvent, a dispersing agent, carbon black and iron oxide black into a mixing barrel, dispersing for 10min to be fully and uniformly by a dispersing machine at the dispersion efficiency of 700r/min, and soaking for 20 hours;
b, adding a polyester resin solution and an organic silicon modified polyester resin solution, dispersing for 20min by a dispersion machine at the dispersion efficiency of 700r/min until the mixture is in a uniform flowing state, and then transferring to a sand mill;
c, adjusting the rotating speed of the sand mill to 1200r/min, and the air pressure to be 0.3kPa, opening circulating cooling water at 15 ℃, and sanding for 5 times, wherein the specific times are determined according to the grinding efficiency of the sand mill until the fineness is 2 mu m;
d, adding filler and an auxiliary agent, dispersing for 20min to be fully uniform by a dispersion machine at the dispersion efficiency of 700r/min, and sanding once again;
e, binding 300-mesh filter cloth at a discharge port, filtering when the material temperature is about 62 ℃ and the viscosity is about 2500mPa.s to obtain the printing ink.
Firstly, 12 parts of organic solvent, 9 parts of dispersing agent, 15 parts of carbon black and 8 parts of iron oxide black are taken out and put into a batching barrel, the organic solvent, 9 parts of dispersing agent, 15 parts of carbon black and 8 parts of iron oxide black are dispersed for 10min to be fully and uniformly by a dispersing machine with the dispersion efficiency of 700r/min, the organic solvent is soaked for 20 hours, so that the 9 parts of dispersing agent and 15 parts of carbon black are fully contacted and anchored on the surface of carbon black molecules, the carbon black can be fully and uniformly wrapped in a resin system, the carbon black molecules are separated by the dispersing agent, the storage stability is effectively improved, the generation of printing pinholes can be greatly reduced, the organic solvent has the characteristics of strong solvent power, high boiling point, small taste and environmental protection, the discharge of the solvent and the drying of ink are facilitated, the dispersing agent is anchored on the surface of pigment, a pigment matching mode of carbon black and iron oxide black is adopted, then adding 40 parts of polyester resin, dispersing for 20min by a dispersion machine with the dispersion efficiency of 700r/min until the mixture is in a uniform flowing state, transferring to a sand mill, adding 4 parts of filler and 0.8 part of auxiliary agent, dispersing for 20min to be fully uniform by the dispersion machine with the dispersion efficiency of 700r/min, sanding once again, wherein the filler is calcium carbonate, has small particle size, easy dispersion, good transparency and high stability, can effectively improve the printing performance and the drying performance of the ink, 300-mesh filter cloth is bound at a discharge port, the material temperature is about 62 ℃, the viscosity is about 2500mPa.s (the viscosity standard at 25 ℃ is 8000-12000mPa.s), filtering while hot to obtain the printing ink for the composite back panel of the mobile phone, filtering while hot can avoid the problem of difficult filtering caused by the increase of the viscosity after the cooling of the ink, and other devices such as vacuum filtration and the like are not needed, so that the requirements of high insulativity and high covering are well met, the printing times of manufacturers are reduced, printing ink is saved, labor is saved, time cost is saved, the boiling-resistant time of conventional printing ink is increased by 100%, more excellent flexibility is achieved, the material is bent by 180 degrees, cracking cannot occur to upper-layer printing ink, wrinkling, shining and other defects are avoided, the production process is optimized, the grinding efficiency can be greatly improved by soaking of pigment and adjusting of working parameters of a sand mill, the storage stability of the printing ink is improved, high covering and high insulating coexistence of the printing ink of the mobile phone backboard is achieved, the flexibility cannot be worsened after the boiling-resistant performance is met, and poor problems such as cracking, wrinkling and shining cannot occur easily in hot bending.
Example 2:
a black printing ink for a backboard of an explosion-proof membrane of a mobile phone comprises the following raw materials: the organic silicon modified polyester resin comprises a polyester resin solution, an organic silicon modified polyester resin solution, an organic solvent, a dispersing agent, carbon black, iron oxide black, a filler and an auxiliary agent, wherein the raw materials comprise the following components in percentage by weight:
polyester resin solution: 50 parts of a mixture;
silicone modified polyester resin solution: 14 parts of (1);
organic solvent: 14 parts of (1);
dispersing agent: 10 parts of (A);
carbon black: 16 parts of a mixture;
black iron oxide: 9 parts of (1);
filling: 5 parts of a mixture;
auxiliary agent: 1 part.
A preparation method of black printing ink for a backboard of an explosion-proof membrane of a mobile phone comprises the following steps:
a, putting an organic solvent, a dispersing agent, carbon black and iron oxide black into a mixing barrel, dispersing for 10min to be fully and uniformly by a dispersing machine at the dispersion efficiency of 700r/min, and soaking for 20 hours;
b, adding a polyester resin solution and an organic silicon modified polyester resin solution, dispersing for 20min by a dispersion machine at the dispersion efficiency of 700r/min until the mixture is in a uniform flowing state, and then transferring to a sand mill;
c, adjusting the rotation speed of the sand mill to 1200r/min, and the air pressure to be 0.3kPa, opening circulating cooling water at the temperature of 15 ℃, and sanding for 5 times until the fineness is 2 mu m;
d, adding filler and an auxiliary agent, dispersing for 20min to be fully uniform by a dispersion machine at the dispersion efficiency of 700r/min, and sanding once again;
e, binding 300-mesh filter cloth at a discharge port, filtering when the material temperature is about 62 ℃ and the viscosity is about 2500mPa.s to obtain the printing ink.
Firstly, 14 parts of organic solvent, 10 parts of dispersing agent, 16 parts of carbon black and 9 parts of iron oxide black are taken out and put into a mixing barrel, the organic solvent, the dispersing agent, the 16 parts of carbon black and the 9 parts of iron oxide black are dispersed for 10min to be fully and uniformly by a dispersing machine with the dispersion efficiency of 700r/min, the mixture is soaked for 20 hours, so that the 10 parts of dispersing agent and the 16 parts of carbon black are fully contacted and anchored on the surface of carbon black molecules, the carbon black can be fully and uniformly wrapped in a resin system, the carbon black molecules are separated by the dispersing agent, the storage stability is effectively improved, the generation of printing pinholes can be greatly reduced, the organic solvent has the characteristics of strong solvent power, high boiling point, small taste and environmental protection, the discharge of the solvent and the drying of ink are facilitated, the dispersing agent is anchored on the surface of pigment, a pigment matching mode of carbon black and iron oxide black is adopted, then adding 50 parts of polyester resin, dispersing for 20min by a dispersion machine with the dispersion efficiency of 700r/min until the mixture is in a uniform flowing state, transferring to a sand mill, adding 5 parts of filler and 1 part of auxiliary agent, dispersing for 20min by the dispersion machine with the dispersion efficiency of 700r/min until the mixture is sufficiently uniform, sanding once again, wherein the filler adopts calcium carbonate, has small particle size, easy dispersion, good transparency and high stability, can effectively improve the printing performance and the drying performance of the ink, 300-mesh filter cloth is bound at a discharge port, the material temperature is about 62 ℃, the viscosity is about 2500mPa.s (the viscosity standard is 8000-00 mPa.s at 25 ℃), 120heat filtering is carried out to obtain the printing ink for the composite back plate of the mobile phone, the problem of difficult filtering caused by the increase of the viscosity after the cooling of the printing ink can be avoided by hot filtering, other devices such as vacuum filtration and the like are not required, the requirements of high insulativity and high covering, the printing times of manufacturers are reduced, printing ink is saved, labor is saved, time cost is saved, the boiling-resistant time of conventional printing ink is increased by 100%, more excellent flexibility is achieved, the material is bent by 180 degrees, cracking cannot occur to upper-layer printing ink, wrinkling, shining and other defects are avoided, the production process is optimized, the grinding efficiency can be greatly improved by soaking of pigment and adjusting of working parameters of a sand mill, the storage stability of the printing ink is improved, high covering and high insulating coexistence of the printing ink of the mobile phone backboard is achieved, the flexibility cannot be worsened after the boiling-resistant performance is met, and poor problems such as cracking, wrinkling and shining cannot occur easily in hot bending.
According to comparative examples 1-2 and examples 1-2, 10 parts of four black printing inks of mobile phone back panels made of different components are respectively made, then 10 parts of the black printing inks of the mobile phone back panels made of four materials with different components are respectively extracted, the adhesive force and the boiling resistance are detected by a Baige method, the thickness of a paint film is detected by a C112X digital micrometer, the fineness is detected by a QXP scraper fineness gauge, the appearance of the paint film is judged by visual observation, the insulation is detected by a surface resistance instrument, the covering property is detected by light irradiation visual observation, the alcohol wiping resistance is detected by a friction loss machine, and the heat bending resistance is detected by a hot press, so that the following data are obtained:
through the experimental data, the black printing ink for the mobile phone back plate prepared by the invention has high covering performance and high insulating performance, and can meet the requirements of not deteriorating the flexibility after the water boiling resistance and being difficult to crack, wrinkle, shine and the like during hot bending.
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. The black printing ink for the back plate of the mobile phone explosion-proof membrane is characterized by being prepared from the following raw materials: the organic silicon modified polyester resin comprises a polyester resin solution, an organic silicon modified polyester resin solution, an organic solvent, a dispersing agent, carbon black, iron oxide black, a filler and an auxiliary agent, wherein the raw materials comprise the following components in percentage by weight:
polyester resin solution: 40-50 parts;
silicone modified polyester resin solution: 12-15 parts;
organic solvent: 10-16 parts;
dispersing agent: 8-10 parts;
carbon black: 14-18 parts;
black iron oxide: 7-9 parts;
filling: 3-5 parts;
auxiliary agent: 0.5-1 part.
2. The black printing ink for the back plate of the mobile phone explosion-proof membrane as claimed in claim 1, wherein the polyester resin is a resin solution in which one or more of propylene glycol methyl ether acetate, 3-methoxy methyl propionate and ethylene glycol butyl ether acetate is adopted as a solid and dissolved to solid content of 60%.
3. The black printing ink for the back plate of the explosion-proof membrane of the mobile phone as claimed in claim 1, wherein the organosilicon modified polyester resin is a resin solution prepared by dissolving one or more of ethylene glycol diacetate, dimethyl 2-methylglutarate and methyl 3-methoxypropionate into a solid content of 40%.
4. The black printing ink for the mobile phone explosion-proof membrane back plate as claimed in claim 1, wherein the organic solvent is one or more of propylene glycol methyl ether acetate, 3-methoxy-3 methyl butyl acetate, ethylene glycol diacetate and 2-methyl dimethyl glutarate.
5. The black printing ink for the mobile phone explosion-proof membrane back plate as claimed in claim 1, wherein the dispersant is a high molecular weight polyurethane type dispersant.
6. The black printing ink for the back plate of the mobile phone explosion-proof membrane as claimed in claim 4, wherein the primary particle size of the carbon black is 20-50nm, and the DBP oil absorption value of the carbon black is 80-120ml/100 g.
7. The black printing ink for the back plate of the explosion-proof membrane of the mobile phone according to claim 1, wherein the iron oxide black is ferroferric oxide.
8. The black printing ink for the mobile phone explosion-proof membrane back plate as claimed in claim 1, wherein the filler is one or more of calcium carbonate, barium sulfate and talcum powder.
9. The black printing ink for the mobile phone explosion-proof membrane back plate as claimed in claim 7, wherein the auxiliary agent is a mixture of a foam breaking polymer and silicone.
10. A preparation method of black printing ink for a mobile phone explosion-proof membrane back plate is applied to the black printing ink for the mobile phone back plate of any one of claims 1 to 9, and is characterized by comprising the following steps of:
a, putting an organic solvent, a dispersing agent, carbon black and iron oxide black into a mixing barrel, dispersing for 10min to be fully and uniformly by a dispersing machine at the dispersion efficiency of 700r/min, and soaking for 20 hours;
b, adding a polyester resin solution and an organic silicon modified polyester resin solution, dispersing for 20min by a dispersion machine at the dispersion efficiency of 700r/min until the mixture is in a uniform flowing state, and then transferring to a sand mill;
c, adjusting the rotation speed of the sand mill to 1200r/min, and the air pressure to be 0.3kPa, opening circulating cooling water at the temperature of 15 ℃, and sanding for 5 times until the fineness is 2 mu m;
d, adding filler and an auxiliary agent, dispersing for 20min to be fully uniform by a dispersion machine at the dispersion efficiency of 700r/min, and sanding once again;
e, binding 300-mesh filter cloth at a discharge port, filtering when the material temperature is about 62 ℃ and the viscosity is about 2500mPa.s to obtain the printing ink.
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| CN111423805A (en) * | 2020-05-19 | 2020-07-17 | Oppo广东移动通信有限公司 | Explosion-proof coating and preparation method thereof, battery rear cover and preparation method thereof, and electronic equipment |
| CN112280372A (en) * | 2020-11-30 | 2021-01-29 | 厦门三德信科技股份有限公司 | Low-temperature cover plate ink and preparation method thereof |
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