CN111965962A - Carbon powder box, antibacterial carbon powder and preparation method thereof - Google Patents
Carbon powder box, antibacterial carbon powder and preparation method thereof Download PDFInfo
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- CN111965962A CN111965962A CN202010806887.9A CN202010806887A CN111965962A CN 111965962 A CN111965962 A CN 111965962A CN 202010806887 A CN202010806887 A CN 202010806887A CN 111965962 A CN111965962 A CN 111965962A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 94
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000000654 additive Substances 0.000 claims abstract description 58
- 230000000996 additive effect Effects 0.000 claims abstract description 58
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 52
- 239000002245 particle Substances 0.000 claims abstract description 51
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 40
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 36
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims description 90
- 238000000034 method Methods 0.000 claims description 44
- 230000007613 environmental effect Effects 0.000 claims description 39
- 238000007873 sieving Methods 0.000 claims description 38
- 230000008569 process Effects 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 229910021485 fumed silica Inorganic materials 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 230000005661 hydrophobic surface Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000007639 printing Methods 0.000 abstract description 44
- 238000011161 development Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 25
- 239000002994 raw material Substances 0.000 description 13
- 239000011362 coarse particle Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 12
- 239000010419 fine particle Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 9
- 210000000078 claw Anatomy 0.000 description 8
- -1 silver ions Chemical class 0.000 description 8
- 239000010882 bottom ash Substances 0.000 description 7
- 235000012813 breadcrumbs Nutrition 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 7
- 238000004381 surface treatment Methods 0.000 description 7
- 229920005792 styrene-acrylic resin Polymers 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000006229 carbon black Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 235000013339 cereals Nutrition 0.000 description 4
- 239000004205 dimethyl polysiloxane Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- NEXSMEBSBIABKL-UHFFFAOYSA-N hexamethyldisilane Chemical compound C[Si](C)(C)[Si](C)(C)C NEXSMEBSBIABKL-UHFFFAOYSA-N 0.000 description 4
- 238000000053 physical method Methods 0.000 description 4
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000012756 surface treatment agent Substances 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000010558 suspension polymerization method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 235000008429 bread Nutrition 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- MFGZXPGKKJMZIY-UHFFFAOYSA-N ethyl 5-amino-1-(4-sulfamoylphenyl)pyrazole-4-carboxylate Chemical compound NC1=C(C(=O)OCC)C=NN1C1=CC=C(S(N)(=O)=O)C=C1 MFGZXPGKKJMZIY-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001055 blue pigment Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007648 laser printing Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Substances [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
Abstract
The invention relates to the technical field of electrostatic development, in particular to antibacterial carbon powder, which comprises basic carbon powder and an external additive, and is characterized in that the external additive comprises a nano-silver antibacterial agent and hydrophobic silicon dioxide, the particle size of the nano-silver antibacterial agent is 5nm to 200nm, the addition amount of the nano-silver antibacterial agent is 0.01 percent to 1.5 percent of the weight of the basic carbon powder, the particle size of the hydrophobic silicon dioxide is less than 100nm, and the addition amount of the hydrophobic silicon dioxide is 0.5 percent to 2.5 percent of the weight of the basic carbon powder. The invention also comprises a preparation method of the antibacterial carbon powder and a carbon powder box filled with the antibacterial carbon powder. The carbon powder has obvious antibacterial effect and has certain advantages in printing performance compared with basic carbon powder.
Description
Technical Field
The invention relates to the technical field of electrostatic development, in particular to antibacterial carbon powder, a preparation method of the antibacterial carbon powder and a carbon powder box filled with the antibacterial carbon powder.
Background
Office manuscripts printed by printing and copying equipment become common information communication media and carriers in modern society, and if the manuscripts have antibacterial capacity, the office manuscripts can effectively inhibit the transmission and diffusion of bacteria and viruses in office places and protect the health of office staff; on the other hand, the method can also prevent characters from being lost and pictures from fading caused by mildew of the manuscript, and is favorable for long-term preservation of the manuscript. If the carbon powder has the antibacterial performance, the antibacterial capability can be given to the manuscript in the printing and copying links, and the manuscript does not need to be subjected to antibacterial treatment subsequently, so that the time and the labor are saved.
In recent years, domestic laser printing consumable enterprises have made a lot of tests and researches on the formula and the manufacturing process of carbon powder, and have successfully developed printing and copying equipment which can be adapted to mainstream manufacturers, and the printing effect can be comparable to the compatible carbon powder of the original carbon powder, and the compatible carbon powder has considerable research and development strength at present. Therefore, related enterprises in China have power to introduce the antibacterial performance which is not possessed by the original carbon powder into the compatible carbon powder, namely the compatible carbon powder is ensured to have excellent output effect in the printing and copying links, and meanwhile, the broad-spectrum antibacterial capability is endowed to the manuscript.
Disclosure of Invention
The first purpose of the invention is to provide an antibacterial carbon powder which has excellent comprehensive printing performance and can endow the manuscript with broad-spectrum antibacterial capability.
The second objective of the invention is to provide a preparation method of the antibacterial carbon powder.
The third purpose of the invention is to provide a toner cartridge containing the antibacterial carbon powder.
In order to achieve the first purpose, the invention provides antibacterial carbon powder, which comprises basic carbon powder and an external additive, and is characterized in that the external additive comprises a nano-silver antibacterial agent and hydrophobic silica, the particle size of the nano-silver antibacterial agent is 5nm to 200nm, the addition amount of the nano-silver antibacterial agent is 0.01 percent to 1.5 percent of the weight of the basic carbon powder, the particle size of the hydrophobic silica is less than 100nm, and the addition amount of the hydrophobic silica is 0.5 percent to 2.5 percent of the weight of the basic carbon powder.
According to the scheme, the nano silver (s i l ver nanopart i c l e, SNP for short) can release silver ions under the synergistic action of oxygen and protons or be oxidized by oxygen to form nano silver oxide and then release the silver ions, and further the antibacterial effect is achieved in the form of the silver ions. The nano silver has wide application field and lasting antibacterial effect, and is an antibacterial agent with broad-spectrum antibacterial performance. Because the carbon powder contains some inorganic components, the nano-silver antibacterial agent in the external additive can be completely integrated into the formula system of the carbon powder and can play an antibacterial role.
The nano metal particle antibacterial agent contains nano copper and nano zinc besides nano silver, but the nano copper and the nano zinc have differences in antibacterial performance, heat conduction performance and electric conduction performance, and the nano silver is more prominent in the performances of the three aspects, so that the nano metal particle antibacterial agent can bring obvious antibacterial property to carbon powder under the condition of small addition amount. A small amount of nano silver with excellent conductivity can ensure that the charged distribution of carbon powder particles is more uniform, and the printing effect is represented by the improvement of the color density and uniformity of an image and the reduction of bottom ash. The printer makes the carbon dust melting and fix on the paper through the heating roll-in effect of fixation roller in the photographic fixing link, and the nanometer silver that has good heat conductivility can improve the holistic heat conductivility of carbon dust for the carbon dust is faster more abundant in the heat conduction of photographic fixing in-process, shows the promotion of carbon dust photographic fixing firmness in the aspect of the printing effect, and in the improvement of the separation claw and the paper feed guide pulley sticky powder condition in the photographic fixing subassembly, the latter is favorable to reducing the clearance maintenance frequency of printer.
The hydrophobic silicon dioxide as the basic component of the external additive can adjust the fluidity of the carbon powder and the frictional electrification of the carbon powder, so that the nano-silver antibacterial agent is fully dispersed in the carbon powder, thereby better exerting the antibacterial performance and improving the printing performance of the carbon powder. In addition, the basic carbon powder produced by both physical method and chemical method can be modified by external addition, so that the modification of the antibacterial performance of two types of basic carbon powder adopting different production processes can be conveniently realized by introducing the nano-silver antibacterial agent into the external additive relative to the internal addition way.
In a further scheme, the nano silver antibacterial agent is added in an amount of 0.1 to 0.5 percent of the weight of the basic carbon powder.
Therefore, the addition amount of the externally added nano silver is economical, and the carbon powder is remarkably improved in antibacterial performance and printing performance.
In a further proposal, the nano-silver antibacterial agent has a particle size of 20nm to 100 nm.
Therefore, the price difference of the nano-silver raw materials with different grain sizes is large, and the smaller the grain size is, the higher the price is. The nano silver with the particle size specification within the range has better broad-spectrum antibacterial performance and relatively lower selling price, and is suitable for being used as externally added nano silver.
In a further aspect, the hydrophobic silica is fumed silica treated with an electropositive hydrophobic surface treatment agent or an electronegative hydrophobic surface treatment agent.
As can be seen, many base carbon powders contain charge control agents and are therefore electrically conductive, and when added externally, it is necessary to use a hydrophobic silica that matches the electrical properties of the base carbon powder. The particle size of the fumed silica is usually 100nm or less, and the positively charged hydrophobic silica can be obtained by treating with a positively charged hydrophobic surface treatment agent such as aminosilane, or the negatively charged hydrophobic silica can be obtained by treating with a negatively charged hydrophobic surface treatment agent such as dimethyldichlorosilane, hexamethyldisilane, or polydimethylsiloxane.
The further proposal is that the grain diameter of the nano silver antibacterial agent is 20nm, and the addition amount of the nano silver antibacterial agent is 0.1 percent of the weight of the basic carbon powder.
The further proposal is that the grain diameter of the nano silver antibacterial agent is 50nm, and the addition amount of the nano silver antibacterial agent is 0.5 percent of the weight of the basic carbon powder.
Therefore, the particle size specification and the addition amount of the two groups of nano-silver antibacterial agents are from the embodiment of the early research stage, and the nano-silver antibacterial agents with the corresponding particle size specification and the corresponding addition amount can introduce a remarkable antibacterial effect for the carbon powder and improve the printing performance of the carbon powder at a lower cost.
In order to achieve the second object, the present invention provides a method for preparing the antibacterial carbon powder, comprising: adding an external additive into 100 parts by weight of basic carbon powder, then putting the mixture into a speed-adjustable mixer with a cooling function, mixing the mixture in a variable speed way for at least one round, and sieving the mixture by a sieve of 100 meshes to 200 meshes;
the external additive comprises 0.01 to 1.5 parts by weight of nano-silver antibacterial agent with the particle diameter of 5nm to 200nm and 0.5 to 2.5 parts by weight of surface modification treated hydrophobic silicon dioxide with the particle diameter of below 100 nm;
and each variable speed mixing is firstly carried out at a low speed under the mixing speed of 17Hz to 23Hz, is suspended for 30s to 90s, is carried out at a high speed under the mixing speed of 60Hz to 70Hz, is stopped for 30s to 90s, and has the total duration of 40s to 120s and 60s to 180 s.
According to the scheme, the external additive with reasonable component proportion is added into the basic carbon powder by a set of matched variable speed mixing process in the preparation method, so that the antibacterial carbon powder with good mixing quality can be obtained, meanwhile, the printing performance of the basic carbon powder can be improved, and in addition, fine powder blocks formed by the adhesion of the carbon powder in the variable speed mixing process can be effectively removed in the sieving link.
The further proposal is that the material temperature is controlled within 40 ℃ by the mixer in each variable speed mixing process.
The further proposal is that the environmental humidity in the variable speed mixing process is controlled to be less than 70 percent, and the environmental temperature is not higher than 30 ℃.
Therefore, the material temperature and the environmental temperature and humidity are respectively controlled within the ranges in the variable-speed mixing process, so that the carbon powder can be effectively prevented from caking.
In order to achieve the third object, the invention further provides a toner cartridge, which is characterized in that the toner cartridge is provided with the antibacterial toner powder in a toner bin.
Detailed Description
The invention prepares the antibacterial carbon powder according to the following method:
adding 0.01 to 1.5 weight parts of nano silver antibacterial agent with the particle size of 5nm to 200nm and 0.5 to 2.5 weight parts of surface modified hydrophobic silicon dioxide with the particle size of below 100nm into 100 weight parts of basic carbon powder, then putting into a speed-adjustable mixer with a cooling function (the pot body of the mixer has the cooling function), mixing in a variable speed manner for at least one round, then sieving by a sieve of 100 meshes to 200 meshes, mixing in a low speed of 17Hz to 23Hz in each round of variable speed mixing, pausing for 30s to 90s, then mixing in a high speed of 60Hz to 70Hz, and then stopping for 30s to 90 s. The total duration of the low speed mixing is 40s to 120s, and the total duration of the high speed mixing is 60s to 180 s.
Example one
This example uses a base carbon powder prepared by a suspension polymerization method, which contains 46 parts by weight of a styrene monomer, 46 parts by weight of a butyl acrylate monomer, 2 parts by weight of a Fischer-Tropsch wax, 5 parts by weight of carbon black as a colorant, and 1 part by weight of aniline black as an electropositive charge control agent, and has a particle diameter of 7 μm to 10 μm. The external additive in the embodiment comprises 0.5 part of 12nm hydrophobic silica, specifically is obtained by performing surface treatment on fumed silica by using aminosilane, and in the embodiment, 0.01 part of nano silver powder with the particle size of 5nm is used as a nano silver antibacterial agent in the external additive.
And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function at a variable speed, and sieving by a 100-mesh sieving machine to obtain the finished antibacterial carbon powder. The variable speed mixing was first performed at a low speed for 40s at a mixing speed of 17Hz to 23Hz, suspended for 30s, followed by high speed for 60s at a mixing speed of 60Hz to 70Hz, and then stopped for 60 s. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Example two
In this embodiment, the same basic carbon powder as in the first embodiment is used, the external additive in this embodiment includes 1 part of 12nm hydrophobic silica, specifically, the silica is obtained by performing surface treatment on fumed silica by using aminosilane, and in this embodiment, 0.01 part of nano silver powder with a particle size of 20nm is used as the nano silver antibacterial agent in the external additive.
And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a variable speed way in the same way as in the first embodiment, and then sieving the mixture by a 120-mesh sieving machine to obtain the finished product of the antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
EXAMPLE III
This example used a base carbon powder prepared by a suspension polymerization method, which contains 46 parts by weight of a styrene monomer, 46 parts by weight of a butyl acrylate monomer, 3 parts by weight of a fischer-tropsch wax, 5 parts by weight of a phthalocyanine blue pigment as a colorant, and 1 part by weight of zinc salicylate as an electronegative charge control agent, and which had a particle size of 7 μm to 10 μm. The external additive in this example includes 0.5 parts of 6nm hydrophobic silica obtained by surface-treating fumed silica with hexamethyldisilane, and 1.5 parts of 50nm hydrophobic silica obtained by surface-treating fumed silica with polydimethylsiloxane, and the nano-silver antibacterial agent in the external additive in this example also includes 0.05 parts of nano-silver powder having a particle size of 50 nm.
And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function at a variable speed, and sieving by a 140-mesh sieving machine to obtain the finished antibacterial carbon powder. The variable speed mixing was first performed at a low speed for 60s at a mixing speed of 17Hz to 23Hz, suspended for 40s, followed by high speed for 90s at a mixing speed of 60Hz to 70Hz, and then stopped for 30 s. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Example four
The present example uses a suspension polymerization method base carbon powder, which is basically the same as the third example in terms of component ratio, except that 5 parts of colorant is used as a magenta pigment, and the particle size of the base carbon powder is 7 μm to 10 μm. The external additive used in this example was also substantially the same as in example three except that 0.05 part of the nano-silver antibacterial agent was silver nano-powder having a particle size of 200 nm.
And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a variable speed way in the same way as the three phases of the embodiment, and then sieving the mixture by a 170-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
EXAMPLE five
This example used a physical base carbon powder using raw materials including, by weight, 50 parts of styrene-acrylic resin, 45 parts of magnetic powder, 3 parts of PE wax, and 2 parts of an electropositive quaternary ammonium charge control agent. The raw materials are subjected to normal-temperature mixing, melting and mixing and coarse crushing treatment to obtain coarse particles with the particle size of about 2mm, then the coarse particles are crushed into fine particles with the diameter (D50) of 5-15 mu m by an airflow crusher, and finally a classifier is used for ensuring that the weight ratio of the part with the particle size of more than 5 mu m in the fine particles is more than 75% to obtain the basic carbon powder.
The external additive in the embodiment comprises 1.5 parts of 14nm hydrophobic silica, specifically is obtained by performing surface treatment on fumed silica by using aminosilane, and in the embodiment, 0.1 part of nano silver powder with the particle size of 5nm is used as a nano silver antibacterial agent in the external additive. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a two-wheel variable speed manner, and sieving by a 200-mesh sieving machine to obtain the finished antibacterial carbon powder. The variable speed mixing was first performed at a low speed for 40s at a mixing speed of 17Hz to 23Hz, suspended for 60s, followed by high speed for 60s at a mixing speed of 60Hz to 70Hz, and then stopped for 90 s. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
EXAMPLE six
In the embodiment, the same physical method basic carbon powder as in the fifth embodiment is used, the external additive in the embodiment comprises 1.5 parts of 14nm hydrophobic silica, specifically, the silica is obtained by performing surface treatment on gas-phase method silica through amino silane, and in the embodiment, 0.1 part of nano silver powder with the particle size of 20nm is also used as a nano silver antibacterial agent in the external additive.
And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner by two times of variable speed in the same way as in the fifth embodiment, and sieving the mixture by a 200-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
EXAMPLE seven
This example uses a physical base carbon powder using raw materials comprising, by weight, 90 parts of styrene-acrylic resin, 6 parts of carbon black, 4 parts of PE wax, and 2 parts of an electropositive nigrosine charge control agent. The raw materials are subjected to normal-temperature mixing, melting and mixing and coarse crushing treatment to obtain coarse particles with the particle size of about 2mm, then the coarse particles are crushed into fine particles with the diameter (D50) of 5-15 mu m by an airflow crusher, and finally a classifier is used for ensuring that the weight ratio of the part with the particle size of more than 5 mu m in the fine particles is more than 75% to obtain the basic carbon powder.
The external additive in the embodiment comprises 1.2 parts of 14nm hydrophobic silica, specifically is obtained by performing surface treatment on fumed silica by using aminosilane, and in the embodiment, 0.5 part of nano silver powder with the particle size of 50nm is used as a nano silver antibacterial agent in the external additive. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a two-wheel variable speed manner, and sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. The variable speed mixing is first carried out at a low speed for 60s at a mixing speed of 17Hz to 23Hz, is suspended for 90s, is then carried out at a high speed for 90s at a mixing speed of 60Hz to 70Hz, and is then stopped for 60 s. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Example eight
This example uses a physical base carbon powder using raw materials including, by weight, 92 parts of styrene-acrylic resin, 5 parts of carbon black, 3 parts of PE wax, and 2 parts of an electropositive nigrosine charge control agent. The raw materials are subjected to normal-temperature mixing, melting and mixing and coarse crushing treatment to obtain coarse particles with the particle size of about 2mm, then the coarse particles are crushed into fine particles with the diameter (D50) of 5-15 mu m by an airflow crusher, and finally a classifier is used for ensuring that the weight ratio of the part with the particle size of more than 5 mu m in the fine particles is more than 75% to obtain the basic carbon powder.
The external additive in the embodiment comprises 1.2 parts of 14nm hydrophobic silica, specifically is obtained by performing surface treatment on fumed silica by using aminosilane, and in the embodiment, 0.5 part of nano silver powder with the particle size of 200nm is used as a nano silver antibacterial agent in the external additive.
And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner by two times of variable speed in the same way as in the seventh embodiment, and then sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Example nine
This example uses a physical base carbon powder using raw materials including, by weight, 92 parts of styrene-acrylic resin, 4 parts of carbon black, 3 parts of PP wax, and 1 part of an electronegative azo iron complex charge control agent. The raw materials are subjected to normal-temperature mixing, melting and mixing and coarse crushing treatment to obtain coarse particles with the particle size of about 2mm, then the coarse particles are crushed into fine particles with the diameter (D50) of 5-15 mu m by an airflow crusher, and finally a classifier is used for ensuring that the weight ratio of the part with the particle size of more than 5 mu m in the fine particles is more than 75% to obtain the basic carbon powder.
The external additive in the embodiment comprises 1.5 parts of 12nm hydrophobic silica, specifically, the silica is obtained by performing surface treatment on fumed silica by hexamethyldisilane, and in the embodiment, 0.1 part of nano silver powder with the particle size of 50nm is used as a nano silver antibacterial agent in the external additive. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a two-wheel variable speed manner, and sieving the mixture by a 100-mesh sieving machine to obtain the finished antibacterial carbon powder. The variable speed mixing is performed by mixing at a low speed for 40s at a mixing speed of 17Hz to 23Hz, pausing for 40s, then mixing at a high speed for 60s at a mixing speed of 60Hz to 70Hz, and then stopping for 70 s. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Example ten
This example uses a physical base carbon powder using raw materials including, by weight, 92 parts of styrene-acrylic resin, 5 parts of carbon black, 3 parts of PP wax, and 1 part of electronegative zinc salicylate charge control agent. The raw materials are subjected to normal-temperature mixing, melting and mixing and coarse crushing treatment to obtain coarse particles with the particle size of about 2mm, then the coarse particles are crushed into fine particles with the diameter (D50) of 5-15 mu m by an airflow crusher, and finally a classifier is used for ensuring that the weight ratio of the part with the particle size of more than 5 mu m in the fine particles is more than 75% to obtain the basic carbon powder.
The external additive in the embodiment comprises 2.5 parts of 14nm hydrophobic silicon dioxide, specifically, the surface of fumed silica is treated by polydimethylsiloxane, and in the embodiment, 0.4 part of nano silver powder with the particle size of 200nm is used as a nano silver antibacterial agent in the external additive. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner at two times with variable speed according to the same method as in the ninth embodiment, and then sieving the mixture by a 100-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
EXAMPLE eleven
This example uses a physical base carbon powder using raw materials including, by weight, 50 parts of styrene-acrylic resin, 44 parts of magnetic powder, 3 parts of PP wax, and 1 part of an azo-iron complex charge control agent having electronegativity. The raw materials are subjected to normal-temperature mixing, melting and mixing and coarse crushing treatment to obtain coarse particles with the particle size of about 2mm, then the coarse particles are crushed into fine particles with the diameter (D50) of 5-15 mu m by an airflow crusher, and finally a classifier is used for ensuring that the weight ratio of the part with the particle size of more than 5 mu m in the fine particles is more than 75% to obtain the basic carbon powder.
The external additive in this example includes 1 part of 12nm hydrophobic silica obtained by surface-treating fumed silica with hexamethyldisilane, and 0.6 part of 14nm hydrophobic silica obtained by surface-treating fumed silica with polydimethylsiloxane, and in this example, 1 part of nano silver powder having a particle size of 50nm is used as the nano silver antibacterial agent in the external additive.
And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a two-wheel variable speed manner, and sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. The variable speed mixing was first carried out at a low speed for 40s at a mixing speed of 17Hz to 23Hz, suspended for 50s, followed by high speed for 90s at a mixing speed of 60Hz to 70Hz, and then stopped for 80 s. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Example twelve
The same physical method base carbon powder as in example eleven was used in the present example, and the same hydrophobic silica as in example eleven was used as the external additive in the present example, but 1.5 parts of nano silver powder having a particle size of 50nm was used as the nano silver antibacterial agent. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner at two times with variable speed according to the same method as the embodiment eleven, and then sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Comparative example 1
The present comparative example used the same physical process base carbon powder as in example eleven, and the external additive used in the present comparative example used the same hydrophobic silica as in example eleven, but used 10 parts of nano silver powder having a particle size of 5nm as the nano silver antibacterial agent. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner at two times with variable speed according to the same method as the embodiment eleven, and then sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Comparative example No. two
The present comparative example used the same physical process base carbon powder as in example eleven, and the external additive used in the present comparative example used the same hydrophobic silica as in example eleven, but used 2 parts of nano silver powder having a particle size of 20nm as the nano silver antibacterial agent. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner at two times with variable speed according to the same method as the embodiment eleven, and then sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Comparative example No. three
The comparative example used the same physical process base carbon powder as in example eleven, and the external additive used in the comparative example contained only the same hydrophobic silica as in example eleven and did not contain the nano-silver antibacterial agent. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner at two times with variable speed according to the same method as the embodiment eleven, and then sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Comparative example No. four
The comparative example used the same physical process base carbon powder as in example five, and the external additive used in the comparative example contained only the same hydrophobic silica as in example five and did not contain the nano-silver antibacterial agent. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner by two times of variable speed in the same way as in the fifth embodiment, and sieving the mixture by a 200-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
Comparative example five
The comparative example used the same physical process base carbon powder as in example eight, and the external additive used in the comparative example contained only the same hydrophobic silica as in example eight and did not contain the nano-silver antibacterial agent. And (3) mixing the basic carbon powder and the external additive in a speed-adjustable mixer with a cooling function in a speed-adjustable manner at two times with variable speed according to the same method as the eighth embodiment, and sieving the mixture by a 150-mesh sieving machine to obtain the finished antibacterial carbon powder. And in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, the environmental temperature is controlled to be less than 30 ℃, and meanwhile, the material temperature is controlled to be within 40 ℃ through the mixer.
The antibacterial carbon powder produced in the first, second, seventh, eighth and fifth examples is loaded into a powder box adapted to a brother HL-2040 type printer, and then loaded into a printer of a corresponding type to print 2500 pages, the printing quality of the manuscript is evaluated according to the relevant requirements of '4.11 printing image quality' in GB/T21199-2007, and the evaluation result is shown in the column of 'printing effect' in Table 1. Before the printing test, the separating claw and the paper feeding guide wheel in the fixing assembly of the printer corresponding to the seventh and eighth embodiments need to be cleaned, so that the powder sticking condition of the separating claw and the paper feeding guide wheel can be observed after the printing test is finished, and the evaluation result is shown in the column of "powder sticking condition" in table 2.
The carbon powder produced in the third and fourth embodiments is loaded into a powder box adapted to an HP CP1215 type printer, and then loaded into a printer of a corresponding type to print 1500 pages, the printing quality of the manuscript is evaluated according to the related requirement of '4.4 printing quality' in JB/T11732-2013, and the evaluation result is shown in the 'printing effect' column in Table 1.
The carbon powder produced in the fifth embodiment, the sixth embodiment and the fourth embodiment is loaded into powder boxes of FS-1020MFP printers adapted to Beijing porcelain, then the powder boxes are loaded into printers of corresponding models to print 2500 pages, the printing quality of the manuscript is evaluated according to the relevant requirements of '4.11 printing image quality' in GB/T21199-2007, and the evaluation result is shown in the column of 'printing effect' in Table 1. Before the printing test, the separation claw and the paper feeding guide wheel in the fixing assembly of the printer corresponding to the fifth and sixth embodiments need to be cleaned, so that the powder sticking condition of the separation claw and the paper feeding guide wheel can be observed after the printing test is finished, and the evaluation result is shown in the column of "powder sticking condition" in table 2.
The carbon powder produced in the eleventh embodiment, the twelfth embodiment and the first to third embodiment are loaded into a powder box adapted to an HP P1566 printer, and then loaded into a printer of the corresponding type to print 1500 pages, the printing quality of the manuscript is evaluated according to the relevant requirements in GB/T21199-2007 "4.11 printing image quality", and the evaluation result is shown in the column of "printing effect" in Table 1.
The carbon powder produced in the nine and ten embodiments is loaded into a powder box adapted to a three-star ML-2160 printer, and then loaded into a printer of a corresponding model to print 1300 pages, the printing quality of the manuscript is evaluated according to the related requirements of '4.11 printing image quality' in GB/T21199-2007, and the evaluation result is shown in the column of 'printing effect' in Table 1.
The circleincircy of the column of the printing effect of the table 1 except for the third and the fourth embodiments represents that the printing performance of the carbon powder is qualified, namely the image density is more than or equal to 1.35, the bottom ash is less than or equal to 0.01, the gradation is more than or equal to 10, the fixation firmness is more than or equal to 90 percent, the density unevenness is less than or equal to 10 percent, and no image abnormality exists; ". smallcircle" represents that the printing performance of the toner is not good, i.e., the image density is not more than 1.35, or the bottom ash is not less than 0.01, or the gradation is not more than 10, or the fixing firmness is not more than 90%, or the density unevenness is not less than 10%, or the image is abnormal. For the third and fourth embodiments, ". circleincircle" represents that the printing quality of the carbon powder is qualified, namely, the color density of the image is more than or equal to 1.0, the bottom ash is less than or equal to 0.02, the gradation is more than or equal to 8, the fixation firmness is more than or equal to 93 percent, and the density nonuniformity is less than or equal to 25 percent; ". smallcircle" represents that the printing quality of the toner is not good, i.e. the image density is not more than 1.0, or the bottom ash is not less than 0.02, or the gradation is not more than 8, or the fixing firmness is not more than 93%, or the density unevenness is not less than 25%.
The operation flow of the carbon powder antibacterial performance test is as follows: 1 a 4-format black sheet having a print coverage of 100% and 1 a 4-format gray sheet having a gray level of 50% corresponding to each of examples and comparative examples were prepared. Uniformly spreading 12-15 fresh breadcrumbs on the surface of each manuscript of the sample, wherein the length and the width of each single breadcrumb are about 5mm, and then spraying 3 ml-5 m l water by using a sprayer to uniformly wet the surface of the manuscript and the breadcrumbs. 2 of the samples corresponding to each of the examples and comparative examples were stored in a constant temperature and humidity test chamber at an ambient temperature of 25 ℃ to 28 ℃ and a humidity of 80% to 100% for one week, after which the samples were observed for mold formation of wet bread crumbs.
The ' excellent ' in the column of the antibacterial test result ' in table 1 represents that the antibacterial effect is excellent, namely, the wet breadcrumbs on the black plate and the gray plate sample are not mildewed; "o" indicates good antibacterial effect, i.e., there are no mold spots visible to the naked eye on the wet breadcrumbs on the black plate sheet, and 1 to 3 moldy wet breadcrumbs on the gray plate sheet; "Δ" represents the general antibacterial effect, i.e., 1 to 3 mildewed wet breadings on the black or 3 to 6 mildewed wet breadings on the gray; "×" indicates no antibacterial effect, i.e., more than 3 moldy wet breads on the black sheet or more than 6 moldy wet breads on the gray sheet.
The circleincircle in the column of the powder sticking condition in the table 2 represents that the antibacterial carbon powder does not stick to the separation claw and the paper feeding guide wheel after printing; and a mark represents that fused carbon powder is adhered to the separating claw and/or the paper feeding guide wheel after printing.
It can be seen from table 1 that the addition of the nano-silver antibacterial agent with the particle size of 5nm to 200nm to the basic carbon powder prepared by the physical method or the chemical method can bring obvious mildew-proof and antibacterial effects, but the nano-silver has extremely strong electric and heat conducting properties, so that the printing performance of the carbon powder is negatively affected by the excessive addition amount, and relevant conditions can be seen from the printing effects of the first and second comparative examples. Specifically, the main problems of the print quality of comparative example one are low image density and poor fixing fastness, corresponding to a document image density of between 1.15 and 1.35, and fixing fastness of between 80% and 90%. The main problems of the print quality of comparative example two are the presence of low image density and the appearance of random black blocks, corresponding to an image density of the document between 1.2 and 1.4.
Table 1: test carbon powder general profile and printing and antibacterial test results
Referring to table 2, the "image density", "bottom ash" and "fixing fastness" items in table 2 are all evaluated according to the related requirements of "4.11 print image quality" in GB/T21199-2007, and it is known that the printing performance of the toner can be significantly improved by adding the nano silver antibacterial agent to the toner, particularly, in terms of the improvement of image density and fixing fastness and the reduction of gray scale, by comparing the print quality corresponding to examples five, six and comparative example four, and the print quality corresponding to examples seven, eight and comparative example five, and the problem of the sticking of the separation claw and the paper feeding guide roller in the fixing assembly can also be significantly improved by adding the nano silver antibacterial agent to the toner.
Table 2: comparison of printing and powder sticking conditions of carbon powder of examples and comparative examples
| Image density | Bottom ash | Fastness of fixing | Sticky powder condition | |
| EXAMPLE five | 3.4％ | 0.004 | 96.8％ | ◎ |
| EXAMPLE six | 2.1％ | 0.003 | 95.3％ | ◎ |
| EXAMPLE seven | 3.6％ | 0.003 | 97.2％ | ◎ |
| Example eight | 2.8％ | 0.002 | 96.1％ | ◎ |
| Comparative example No. four | 5.2％ | 0.008 | 92.2％ | ○ |
| Comparative example five | 6.5％ | 0.006 | 93.4％ | ○ |
Claims (10)
1. An antibacterial carbon powder comprises a basic carbon powder and an external additive, and is characterized in that:
the external additive comprises a nano-silver antibacterial agent and hydrophobic silica, the particle size of the nano-silver antibacterial agent is 5nm to 200nm, the addition amount of the nano-silver antibacterial agent is 0.01 percent to 1.5 percent of the weight of the basic carbon powder, the particle size of the hydrophobic silica is less than 100nm, and the addition amount of the hydrophobic silica is 0.5 percent to 2.5 percent of the weight of the basic carbon powder.
2. An antibacterial carbon powder according to claim 1, characterized in that:
the addition amount of the nano silver antibacterial agent is 0.1 to 0.5 percent of the weight of the basic carbon powder.
3. An antibacterial carbon powder according to claim 1, characterized in that:
the particle size of the nano-silver antibacterial agent is 20nm to 100 nm.
4. An antibacterial carbon powder according to claim 1, characterized in that:
the hydrophobic silicon dioxide is fumed silica treated by an electropositive hydrophobic surface treating agent or an electronegative hydrophobic surface treating agent.
5. An antibacterial carbon powder according to claim 1, characterized in that:
the particle size of the nano-silver antibacterial agent is 20nm, and the addition amount of the nano-silver antibacterial agent is 0.1 percent of the weight of the basic carbon powder.
6. An antibacterial carbon powder according to claim 1, characterized in that:
the particle size of the nano-silver antibacterial agent is 50nm, and the addition amount of the nano-silver antibacterial agent is 0.5 percent of the weight of the basic carbon powder.
7. A preparation method of antibacterial carbon powder is characterized by comprising the following steps:
adding an external additive into 100 parts by weight of basic carbon powder, then putting the mixture into a speed-adjustable mixer with a cooling function, and sieving the mixture through a sieve of 100 meshes to 200 meshes after at least one round of variable-speed mixing;
the external additive comprises 0.01 to 1.5 parts by weight of nano-silver antibacterial agent with the particle size of 5nm to 200nm and 0.5 to 2.5 parts by weight of surface modification treated hydrophobic silicon dioxide with the particle size of below 100 nm;
and each round of variable speed mixing is firstly carried out at low speed under the mixing speed of 17Hz to 23Hz, is suspended for 30s to 90s, is carried out at high speed under the mixing speed of 60Hz to 70Hz, and is then stopped for 30s to 90s, the total time length of the low speed mixing is 40s to 120s, and the total time length of the high speed mixing is 60s to 180 s.
8. The method for preparing antibacterial carbon powder according to claim 7, characterized in that:
and controlling the material temperature within 40 ℃ by the mixer in each variable speed mixing process.
9. The method for preparing antibacterial carbon powder according to claim 7, characterized in that:
and in the variable-speed mixing process, the environmental humidity is controlled to be less than 70%, and the environmental temperature is not higher than 30 ℃.
10. The utility model provides a cartridge which characterized in that:
the toner cartridge contains the antibacterial toner according to any one of claims 1 to 6 in a toner hopper.
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| WO2023199579A1 (en) * | 2022-04-11 | 2023-10-19 | キヤノン株式会社 | Image forming device |
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