KR101516980B1

KR101516980B1 - Powder toner for laser printer and manufacturing method of the same

Info

Publication number: KR101516980B1
Application number: KR1020140013417A
Authority: KR
Inventors: 피재환; 김근희; 조우석; 김형태
Original assignee: 한국세라믹기술원
Priority date: 2014-02-06
Filing date: 2014-02-06
Publication date: 2015-05-04

Abstract

The present invention relates to a powder toner for a laser printer in which at least one electrostatic induction substance selected from aminosilane and acrylic is coated on a ceramic inorganic pigment in powder state having an average particle diameter of 500 nm to 10 占 퐉 and a method for producing the same. According to the present invention, an electrostatic induction material is coated on a ceramic inorganic pigment to provide electrostatic force necessary for a laser printer, and high resolution and excellent precision can be realized.

Description

Technical Field [0001] The present invention relates to a powder toner for a laser printer,

The present invention relates to a powder toner for a laser printer and a method of manufacturing the same. More particularly, the present invention relates to a powder toner for a laser printer and a method of manufacturing the same, which can provide electrostatic force necessary for a laser printer by coating a ceramic inorganic pigment with an electrostatic induction material, To a powder toner for a laser printer and a manufacturing method thereof.

Domestic ceramics industry is generally shrinking due to the small size and competitiveness of domestic ceramics companies.

Most of the currently used porcelain transfer papers are manufactured by the silk screen printing method.

However, the silkscreen printing method has a resolution as low as 100 dpi and the product productivity of the silkscreen making and squeezing process by color is degraded. Further, there is a problem that the process is complicated and the precision is lowered.

Domestic ceramics companies have difficulty in design competitiveness due to the design by the silkscreen printing method, and the silk screen process for making ceramics transfer paper is complicated, and the low-resolution porcelain transfer paper is produced by a number of silk screen processes by spot color and four color separation And the ceramics transfer paper industry is declining due to the use of many chemicals in the silk screen process.

In order to solve these problems, it is necessary to develop an inorganic pigment for laser printing to realize diversity of decorative design of ceramics, and to improve the resolution and quality of ceramics transfer paper.

Korean Patent Registration No. 10-1105372

The present invention provides a powder toner for a laser printer capable of providing electrostatic force necessary for a laser printer by coating an electrostatic induction material on a ceramic inorganic pigment and realizing high resolution and excellent precision, and a method for manufacturing the powder toner have.

The present invention provides a powder toner for a laser printer in which at least one electrostatic induction substance selected from aminosilane and acrylic is coated on a ceramic inorganic pigment in powder state having an average particle diameter of 500 nm to 10 mu m.

The electrostatic induction material may be coated to have a thickness of 0.001 to 10% of the ceramic inorganic pigment diameter.

Wherein the ceramic inorganic pigment is selected from the group consisting of CoAl ₂ O ₄ powder, Mg ₁ _- _x Co _x Al ₂ O ₄ (0.1 ≤ _x ≤ ₁ ) powder, Mg _{1 - x} Ni _x Al ₂ O ₄ (0.1 ≤ _x ≤ 1) Powder or a mixture thereof.

In addition, the ceramic inorganic pigment may be a pigment containing CaSn ₁ _- _x Cr _x SiO ₄ (0.01? _X? 0.5) powder.

The ceramic inorganic pigment may be a powder of Zr ₁ _- _x Ce _x SiO ₄ (0.01? _X? 0.5), a powder of Zr ₁ _-x Pr _x SiO ₄ (0.01? _X? 0.5), a powder of Zr ₁ _- _x Ta _x SiO ₄ (0.01? X? 0.5) based powder or a mixture thereof.

The ceramic inorganic pigment may be a pigment containing Co (Fe ₁ _- _x Cr _x ) ₂ O ₄ (0.01? _X ? 0.5) powder.

The present invention also provides a method for producing a ceramic green sheet, which comprises preparing a ceramic inorganic pigment in powder form having an average particle diameter of 500 nm to 10 탆, preparing an aminosilane solution in which aminosilane is dissolved in a solvent or an aqueous acrylic acid solution in which acrylic is dissolved in water Preparing a solution in which the aminosilane solution and the acrylic aqueous solution are mixed, mixing the ceramic inorganic pigment with a solution in which the aminosilane solution, the acrylic aqueous solution, the aminosilane solution, and the acrylic aqueous solution are mixed, Coating an inorganic pigment with at least one electrostatic induction substance selected from aminosilane and acrylic and drying the ceramic inorganic pigment coated with at least one electrostatic induction substance selected from aminosilane and acrylic; A method for producing a powder toner is provided.

The solvent may be acetone.

The aminosilane is preferably dissolved in the aminosilane solution in an amount of 0.001 to 1 wt%, and the acrylic is preferably dissolved in the acrylic aqueous solution in an amount of 0.001 to 1 wt%.

The electrostatic induction material is preferably coated to have a thickness of 0.001 to 10% of the ceramic inorganic pigment diameter.

According to the present invention, an electrostatic induction material is coated on a ceramic inorganic pigment to provide electrostatic force necessary for a laser printer, and high resolution and excellent precision can be realized.

The laser printer to which the powder toner for a laser printer of the present invention is applied can be used for manufacturing a ceramic transfer paper having high resolution and excellent precision.

FIG. 1 is a photograph showing a CoAl ₂ O ₄ -based powder as an inorganic pigment which emits blue (cyan).
FIG. 2 is a photograph showing a mixture of a ceramic inorganic pigment and an electrostatic induction material solution according to an example.
FIG. 3 is a graph showing a result of measurement of a charge amount as a result of coating an electrostatic induction material on a ceramic inorganic pigment according to Experimental Examples.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it should be understood that the following embodiments are provided so that those skilled in the art will be able to fully understand the present invention, and that various modifications may be made without departing from the scope of the present invention. It is not.

A laser printer is a printer that records a print image on a photosensitive drum with a laser beam and transfers the image to a paper. The printer is used to make a character or a picture by a laser beam on a drum responsive to the light, .

A laser printer scans a laser beam on a drum to form an electrostatic image on the drum according to the photosensitive drum. On the drum, a static image corresponding to the pattern to be printed is generated. And transferring it onto paper such as paper and fixing it with heat. Since such a laser printer is generally well known, a detailed description thereof will be omitted here.

Disclosed herein is a powder toner for laser printer capable of being used in a ceramics transfer paper or the like. The electrostatic induction material is coated on a ceramic inorganic pigment to provide electrostatic force necessary for a laser printer.

In the present invention, it is desired to use an aminosilane, an acryl or a mixture thereof as the electrostatic induction material, and to coat the electrostatic induction material on the ceramic inorganic pigment to reveal electrostatic charging.

Ceramic inorganic pigments have high light resistance and heat resistance, and are stable to organic solvents. The ceramic inorganic pigment is a pigment made of ceramics and may be a pigment having various colors and may be a pigment of four primary colors of black (K), cyan (C), magenta (M) and yellow (Y) And a pigment which expresses at least one color selected from among the pigments.

For example, CoAl ₂ O ₄ as a ceramic inorganic pigment can be used as an inorganic pigment having a spinel structure and being thermally and chemically stable and emitting blue (cyan). FIG. 1 is a photograph showing a CoAl ₂ O ₄ -based powder as an inorganic pigment which emits blue (cyan). As such blue ceramic inorganic pigments, Mg ₁ _- _x Co _x Al ₂ O ₄ (0.1 _? _X? ₁ ) based powder, Mg ₁ _- _x Ni _x Al ₂ O ₄ (0.1? _X? ₁ ) based powder, And so on.

Examples of the red (magenta) ceramic inorganic pigment include CaSn ₁ _- _x Cr _x SiO ₄ (0.01? _X? 0.5) powder and the like.

Examples of the yellow (yellow) ceramic inorganic pigment include powders of Zr ₁ _- _x Ce _x SiO ₄ (0.01 ≦ _x ≦ 0.5), powders of Zr _{1 - x} Pr _x SiO ₄ (0.01 ≦ _x ≦ 0.5), Zr ₁ _- _x Ta _x SiO ₄ (0.01? _X? 0.5) powder or a mixture thereof.

Examples of the black (black) ceramic inorganic pigment include Co (Fe ₁ _- _x Cr _x ) ₂ O ₄ (0.01? _X ? 0.5) powder and the like.

It is preferable that the ceramic inorganic pigment is a powdery pigment having an average particle diameter of 500 nm to 10 mu m. If the average particle size of the ceramic inorganic pigment is less than 500 nm, the production is difficult and expensive, which is not economical. If the average particle size of the ceramic inorganic pigment exceeds 10 탆, the surface becomes rough after printing, And it may be difficult to form patterns having excellent precision.

In order to impart electrostatic functionality to the ceramic inorganic pigment, an electrostatic induction material is coated. The electrostatic induction material is preferably coated to have a thickness of 0.001 to 10% of the ceramic inorganic pigment diameter. A static induction material solution is formed by mixing a static induction material and a solvent, and the static induction material solution is mixed with the ceramic inorganic pigment so that the static induction material is coated with the static induction material. The electrostatic induction material may be at least one material selected from aminosilane and acrylic.

The aminosilane is dissolved in a solvent such as acetone to form an aminosilane solution, and the aminosilane solution is mixed with the ceramic inorganic pigment to coat the ceramic inorganic pigment with aminosilane. Since aminosilane does not dissolve well, it is preferably added to acetone and stirred for a predetermined time or more (for example, 10 minutes or more). The stirring is preferably performed at a rotation speed of about 10 to 1,000 rpm. It is preferable that the aminosilane is dissolved in the aminosilane solution in an amount of 0.001 to 1 wt%.

The acrylic is dissolved in water to form an acrylic aqueous solution, and the acrylic aqueous solution and the ceramic inorganic pigment are mixed to allow the ceramic inorganic pigment to be coated with acrylic. The acrylic is preferably dissolved in the acrylic aqueous solution in an amount of 0.001 to 1% by weight.

The aminosilane solution and the acrylic aqueous solution may be mixed, and the ceramic inorganic pigment may be mixed with a solution in which the acrylic aqueous solution and the acrylic aqueous solution are mixed, so that the ceramic inorganic pigment is coated with the aminosilane and acrylic. Acetone for dissolving aminosilane has a property of being well mixed with water, so that it is possible to easily mix the acrylic aqueous solution and the acrylic aqueous solution.

FIG. 2 is a photograph showing a mixture of a ceramic inorganic pigment and an electrostatic induction material solution according to an example.

The ceramic inorganic pigment coated with at least one electrostatic induction material selected from aminosilane and acrylic is dried. The drying is preferably carried out for a time (for example, 10 minutes to 48 hours) in which the solvent component can be sufficiently volatized at a temperature of about 40 to 150 ° C.

After drying, the powder particles may be agglomerated, so that the pulverization process or the sieving process may be performed.

The powder toner for laser printer thus manufactured has a structure in which at least one electrostatic induction substance selected from aminosilane and acrylic is coated on a ceramic inorganic pigment in powder state having an average particle diameter of 500 nm to 10 mu m.

Hereinafter, experimental examples according to the present invention will be specifically shown, and the present invention is not limited by the following experimental examples.

In order to impart the electrostatic function to the ceramic inorganic pigment, the electrostatic induction material was coated on the ceramic inorganic pigment.

The ceramic inorganic pigment used was a CoAl ₂ O ₄ powder having an average particle size of 2.64 μm which was blue (cyan). FIG. 1 is a photograph showing the inorganic pigment used, and the components of the inorganic pigment used in Table 1 below were analyzed and shown.

ingredient Content (% by weight) SiO ₂ 1.93 Al ₂ O ₃ 61.18 Fe ₂ O ₃ 0.01 CaO 0.03 MgO 0.06 K ₂ O 0.12 Na ₂ O 0.35 TiO ₂ 0.01 ZrO ₂ 0.01 SrO 0.01 CuO 0.03 CoO 32.22 Cr ₂ O ₃ 0.01 ZnO 3.62 NiO 0.03 SnO ₂ 0.01 PbO 0.02 Ignition Loss 0.35

Liquid - phase aminosilane was used as the electrostatic induction material. The aminosilane was dissolved in acetone to prepare an aminosilane solution. As a method of mixing the electrostatic induction material and the solvent, 100 ml of acetone as a solvent was placed in a 200 ml beaker, 0.01% by weight of aminosilane as a static induction material was added, and the mixture was mixed at a speed of 300 rpm for 30 minutes.

A ceramic inorganic pigment and an aminosilane solution were mixed. In the mixing method, 5 g of a ceramic inorganic pigment was added to an aluminum dish having a diameter of 70 mm and 5 g of an aminosilane solution was added.

The ceramic inorganic pigment coated with aminosilane, which is an electrostatic inducer, was dried in an oven at 100 ° C for 24 hours to completely dry.

After drying, the mixture was sieved into 325 mesh (45 mu m) to disperse the agglomerated particles, and the ceramic inorganic pigment exposed in the air was re-dried in an oven at 100 DEG C for 24 hours to prepare a powder toner for a laser printer Respectively.

The ceramic inorganic pigment used was the same material as in Experimental Example 1 above.

Liquid - phase aminosilane was used as the electrostatic induction material. The aminosilane was dissolved in acetone to prepare an aminosilane solution. As a method of mixing the electrostatic induction material and the solvent, 100 ml of acetone as a solvent was placed in a 200 ml beaker, 0.1% by weight of aminosilane as a static induction material was added, and the mixture was mixed at a speed of 300 rpm for 30 minutes.

The electrostatic induction material was liquid acrylic. The acrylic was dissolved in distilled water to prepare an aqueous acrylic solution. As a method of mixing the electrostatic induction material and the solvent, 100 ml of distilled water was placed in a 200 ml beaker, 0.01 wt% of acryl as a static induction material was added, and the mixture was mixed at a speed of 300 rpm for 30 minutes.

A ceramic inorganic pigment and an acrylic aqueous solution were mixed. In the mixing method, 5 g of a ceramic inorganic pigment was added to an aluminum dish having a diameter of 70 mm, and 5 g of an aqueous acrylic solution was added.

The ceramic inorganic pigment, which is an electrostatic induction material, was dried in a 100 ° C oven for 24 hours to completely dry.

The electrostatic induction material was liquid acrylic. The acrylic was dissolved in distilled water to prepare an aqueous acrylic solution. As a method of mixing the electrostatic induction material and the solvent, 100 ml of distilled water was placed in a 200 ml beaker, 0.1 wt% of acryl as a static induction material was added, and the mixture was mixed at a speed of 300 rpm for 30 minutes.

The charge amount was measured with reference to a charge amount measurement method (standard toner charge amount measurement method) called a blow-off method with respect to the powder toner for a laser printer manufactured according to Experimental Examples 1 to 4. The powdery toner for a laser printer was weighed 1.0 g each, and mixed with 19.0 g of a charge control agent. The toner was then mixed by a planetary stirring apparatus at an idle speed of about 773 rpm and a rotation speed of 337 rpm After stirring for 60 seconds, the powder toner for laser printer was charged by further stirring for 60 seconds at a revolution speed of about 1070 rpm and a rotation speed of 535 rpm. The charge control agent used was an ester-based resin.

After the agitation, the charge amount was measured while sucking and separating the charge agent by using a suction / counter electrometer Q / m meter (Model 212HS, Trace) while suctioning.

In this experiment, the charge amount of powder toner for a laser printer was measured by a suction / counter electrometer Q / m meter (Model 212HS, trade name). After the charging treatment, only a mixture of the charging agent and the powdery toner for laser printer was filled in the sample chamber, and only powdery toner particles for laser printer drawn by a stainless steel sieve having a gap smaller than the particle size of the charging agent were charged in a Faraday cup It was selectively collected in my container. At this time, the total charge amount Q of the powder toner for a laser printer injected into a container in a Faraday cup was calculated from the potential V charged to a known capacity (1 uF) in the apparatus by the following equation.

[Equation 1]

Q = C · V

The charge amount Q / m per unit mass was obtained from the total charge amount Q calculated and the sample mass m used for the measurement.

FIG. 3 is a graph showing a result of measurement of a charge amount as a result of coating an electrostatic induction material on a ceramic inorganic pigment according to Experimental Examples. 3 is for a powder toner for a laser printer manufactured according to Experimental Example 1, C4 is for a powder toner for a laser printer manufactured according to Experimental Example 2, D1 is a laser printer manufactured according to Experimental Example 3, D4 is for a powder toner for a laser printer manufactured according to Experimental Example 4, and D4 is for a powder toner for a laser printer.

As a result of measuring the charge amount of powder toner for laser printer, it was negatively charged in comparison with general inorganic pigment, and it was -9 to -15 μC / g respectively. Among them, the C1 according to Experimental Example 1 exhibited a charge amount of -15 μC / g when 0.01 wt% of aminosilane was added, and it was confirmed that the electrostatic force was larger than that of the conventional pigment. Therefore, when the performance as a toner which can be used in a color laser printer for over ceramics is taken into consideration, it has been found that the electrostatic force can be given by coating the electrostatic induction material on the ceramic inorganic pigment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, This is possible.

Claims

At least one electrostatic induction material selected from aminosilane and acrylic is coated on a ceramic inorganic pigment in powder form having an average particle diameter of 500 nm to 10 mu m,
Wherein the electrostatic induction material is coated to have a thickness of 0.001 to 10% of the ceramic inorganic pigment diameter.

delete

The method of claim 1, wherein the ceramic inorganic pigments CoAl ₂ O ₄ based _{powder, Mg 1 - x Co x Al} 2 O 4 (0.1≤x≤1) based _{powder, Mg 1 - x Ni x Al} 2 O 4 (0.1 Lt; = x < = 1) system powder or a mixture thereof.

The powder toner for a laser printer according to claim 1, wherein the ceramic inorganic pigment is a pigment containing CaSn ₁ _- _x Cr _x SiO ₄ (0.01? _X? 0.5) powder.

The method of claim 1, wherein the ceramic inorganic pigments include _{Zr 1 - x Ce x SiO 4} (0.01≤x≤0.5) based _{powder, Zr 1-x Pr x SiO} 4 (0.01≤x≤0.5) based powder, Zr ₁ _- _x Ta _x SiO ₄ (0.01? _x? 0.5) powder or a mixture thereof.

The powder toner for a laser printer according to claim 1, wherein the ceramic inorganic pigment is a pigment containing Co (Fe ₁ _- _x Cr _x ) ₂ O ₄ (0.01? _X ? 0.5) powder.

Preparing a ceramic inorganic pigment in powder form having an average particle diameter of 500 nm to 10 mu m;
Preparing an aminosilane solution in which aminosilane is dissolved in a solvent or an aqueous acrylic solution in which acrylic is dissolved in water or preparing a solution in which the aminosilane solution and the aqueous acrylic solution are mixed;
The ceramic inorganic pigment is mixed with the aminosilane solution, the acrylic aqueous solution, the solution in which the aminosilane solution and the acrylic aqueous solution are mixed, and the ceramic inorganic pigment is coated with at least one electrostatic induction substance selected from aminosilane and acrylic step; And
And drying the ceramic inorganic pigment coated with at least one electrostatic induction material selected from aminosilane and acrylic,
Wherein the electrostatic induction material is coated to a thickness of 0.001 to 10% of the ceramic inorganic pigment diameter.

The method for producing a powder toner for a laser printer according to claim 7, wherein the solvent is acetone.

The aminosilane according to claim 7, wherein the aminosilane is dissolved in the aminosilane solution in an amount of 0.001 to 1 wt%
Wherein the acrylic is dissolved in the aqueous acrylic solution in an amount of 0.001 to 1 wt%.

delete

The method of claim 7, wherein the ceramic inorganic pigments CoAl ₂ O ₄ based _{powder, Mg 1 - x Co x Al} 2 O 4 (0.1≤x≤1) based _{powder, Mg 1 - x Ni x Al} 2 O 4 (0.1 X < = 1) system powder or a mixture thereof.

The method for producing a powder toner for a laser printer according to claim 7, wherein the ceramic inorganic pigment is a pigment containing CaSn ₁ _- _x Cr _x SiO ₄ (0.01? _X? 0.5) powder.

The method of claim 7, wherein the ceramic inorganic pigments include _{Zr 1 - x Ce x SiO 4} (0.01≤x≤0.5) based _{powder, Zr 1-x Pr x SiO} 4 (0.01≤x≤0.5) based powder, Zr ₁ _- _x Ta _x SiO ₄ (0.01? _x? 0.5) based powder or a mixture thereof.

The method for producing a powder toner for a laser printer according to claim 7, wherein the ceramic inorganic pigment is a pigment containing Co (Fe ₁ _- _x Cr _x ) ₂ O ₄ (0.01? _X ? 0.5) powder.