KR100607986B1 - An antibacterial foam, a method for preparing the same, and a printer catridge comprising the same - Google Patents

Abstract

The present invention relates to a foam material used in a cartridge for a printing apparatus and a method for manufacturing the same, and more specifically, a foam material and its manufacture, characterized in that the silver nanoparticles are contained in an amount of 0.1 to 5.0% by weight based on the total weight of the foam material. It is about a method. According to the present invention, it is possible to provide a cartridge for a printing device having functions of deodorization, antibacterial and sterilization.

Foam materials, cartridges for printing devices, silver nanoparticles

Description

An antibacterial foam, a method for preparing the same, and a printer catridge comprising the same}

1 is a cartridge used in a conventional inkjet printing type printing apparatus, and shows a cartridge filled with a foam material therein.

<Description of Drawing>

10: cartridge case

11: foam material

12: ink supply unit

13: filter

14: communication port

The present invention relates to a foam material used in the cartridge for a printing apparatus and a method for manufacturing the same, more specifically, by containing 0.1 to 5.0% by weight based on the total weight of the foam material, the function of deodorization, antibacterial and sterilization It has a foam material and its manufacturing method.

In general, an ink jet printer is a device for outputting text and images by spraying picoliter-grade ink droplets onto paper through a method such as thermal transfer. In order to eject the ink droplets, a very fine working head is required. do. On the other hand, the head receives the ink from the ink supply case connected to the cartridge, such a cartridge is designed to provide a proper amount of ink to the head and to prevent ink leakage and to facilitate the formation of ink droplets.

1 shows a cartridge used in a printing apparatus of an ink jet printing method conventionally used. The cartridge is a case 10, a foam material 11 filled in the case 10 to hold ink, a supply part 12 installed to supply ink from the foam material 11 to the head, and the supply part. A filter 13 for filtering ink when the ink is discharged from 12, and a communication port 14 for allowing the outside air to communicate with the case 10 so that the ink can easily escape from the foam material 11; Consists of.

That is, by storing the foam member 11 having fine pores in the case 10 in a compressed state and filling a predetermined amount of ink therein, capillary force generated in the micropores of the foam member 11 is obtained. Negative pressure is generated and maintained.

On the other hand, an ink composition for an inkjet printer basically consists of a colorant, a solvent, and an additive, and should have expected jetting properties and adsorption or absorption characteristics expected after jetting. Accordingly, such ink compositions are suitable for viscosity, surface tension, image clarity, jetting stability, drying time, bleeding, storage stability, color reproducibility, affinity with print heads and recording media, frictional bleeding and water resistance of images, and the like. Properties, antibacterial, deodorant and bactericidal properties are among these important properties.

Therefore, conventional antimicrobial inkjet printers add silver particles to the ink composition itself in order to have functions of antibacterial, deodorizing and sterilizing. For example, International Patent Application Publication No. 03/038002, Korean Laid-Open Patent Publication No. 2003-49007, and Japanese Patent Laid-Open Publication No. Hei 7-331151 add antimicrobial effects by adding fine particles of silver to an ink composition. I want to get

However, the current inkjet printing method is a trend to gradually reduce the amount of ink (drop) in order to obtain a high-resolution printing quality, and accordingly the ink jet nozzle is also becoming smaller. Therefore, silver particles added to the ink composition as in the prior art cause clogging in the micronized nozzles, resulting in a problem of degrading the quality of the printed image.

Therefore, the present invention solves the problems of the prior art, by adding the silver nanoparticles to the foam material inside the cartridge, rather than adding silver particles to the ink composition itself, as well as having antibacterial, deodorizing and sterilizing properties, nozzles It is to provide an antimicrobial foam material that can obtain a high quality image without clogging phenomenon.

The present invention, in order to achieve the above technical problem, in one embodiment, provides a foam member characterized in that the silver nanoparticles are added.

In another embodiment,

a) preparing a raw material composition by mixing a prepolymer, a polyol, a polymerization catalyst, silver nanoparticles, a foam stabilizer and a cell regulator;

b) continuously injecting the raw material composition onto a conveyor with a tunnel-shaped sidewall installed in the longitudinal direction;

c) molding the foam in a tack free state by moving the injection along the conveyor; And

d) cutting the foam in a direction perpendicular to the bottom of the conveyor

It provides a method for producing a foam member comprising a.

The present invention provides, in another embodiment, a cartridge for a printing apparatus comprising the foam material.

In another embodiment, the present invention also provides a printing apparatus comprising the cartridge.

Hereinafter, the present invention will be described in more detail.

In one embodiment, the present invention provides a foam material characterized in that the silver nanoparticles are externally attached.

Preferably the content of the silver nanoparticles is included 0.1 to 5.0% by weight based on the total weight of the foam material. When the content of the silver nanoparticles is less than 0.1% by weight, there is a problem in that the antimicrobial effect does not appear. When the content of the silver nanoparticles exceeds 5.0% by weight, even though the antimicrobial effect is sufficiently represented, it is economical by including excess silver nanoparticles. It is not preferable because there is a problem that is disadvantageous.

In addition, preferably the primary particle diameter of the silver nanoparticles is 30 nm to 100 ㎛. When the particle diameter of the silver nanoparticles is smaller than 30 nm, there is a problem that it is difficult to produce silver nanoparticles, when larger than 100 ㎛ there is a problem that it is difficult to evenly disperse the silver particles in the foam material.

The foam material may be a foam material of a conventional material used in the manufacture of cartridges in the art, but is not limited thereto, polyester, polyurethane, amino resin, alkyd resin, phenolic resin, epoxy resin, isocyanate resin, It may be a foam material selected from the group consisting of polysiloxane resins and mixtures thereof, preferably a polyurethane foam material may be used.

In another embodiment, the present invention provides a process for preparing a raw material composition comprising: a) mixing a prepolymer, a polyol, a polymerization catalyst, silver nanoparticles, a foam stabilizer, and a cell regulator; b) continuously injecting the raw material composition onto a conveyor with a tunnel-shaped sidewall installed in the longitudinal direction; c) molding the foam in a tack free state by moving the injection along the conveyor; And d) cutting the foam in a direction perpendicular to the bottom of the conveyor.

Preferably, the raw material composition is based on 100 parts by weight of prepolymer, 10 to 100 parts by weight of polyol, 0.01 to 20 parts by weight of polymerization catalyst, 0.1 to 20 parts by weight of silver nanoparticles, 0.1 to 50 parts by weight of foam stabilizer, and cell 0.1 to 20 parts by weight of a regulator.

Preferably, the prepolymer is selected from the group consisting of toluene diisocyanate, diphenylene methane diisocyanate and mixtures thereof.

Preferably, as the polyol component, polyester-based polyols and / or polyether-based polyols and the like may be used, and polyether-based polyols having excellent water resistance are more preferable in the production of foam materials for inkjet printers. The content of the polyol component is preferably 10 to 100 parts by weight based on 100 parts by weight of the prepolymer, and if the content is less than 10 parts by weight, the polymer is incompletely formed, which is not preferable, and the content is 100 parts by weight. If it exceeds, there is a problem that the residual amount of unreacted material increases, which is not preferable.

The raw material composition also includes a polymerization catalyst for catalyzing the polymerization reaction of the prepolymer. For example, in the production of polyurethane foam material, a polymerization catalyst which catalyzes the isocyanate trimerization reaction of the prepolymer produced from the reaction of an organic polyisocyanate with an aromatic monool may be used. In the present invention, in addition to the isocyanate trimerization catalyst as described above, various kinds of polymerization catalysts may be used according to the material of the selected foam material. For example, dimethylhexylamine, dimethylcyclohexylamine, pentamethyldiethylenetriamine, dimethylethanol Tertiary amines such as amines, tetramethylethylenediamine, tetramethylhexamethylenediamine, triethylenediamine and tetramethylpropanediamine, and their carboxylate or quaternary ammonium salts, and organometallic compounds such as dibutyltin di Laurate, lead octylate, potassium acetate and potassium octylate can be used. These catalysts may be used alone or in combination of two or more.

The content of the polymerization catalyst is preferably included in an amount of 0.01 to 20 parts by weight based on 100 parts by weight of the prepolymer.

The raw material composition also includes 0.1 to 20 parts by weight of silver nanoparticles based on 100 parts by weight of the prepolymer. The content of the silver nanoparticles is preferably included in an amount that may be included in 0.1 to 5.0% by weight based on the total weight of the final foam material, and therefore 0.1 to 20 parts by weight based on 100 parts by weight of the prepolymer. Do. For the above reason, it is preferable that the primary particle diameter of the said silver nanoparticle is 30 nm-100 micrometers.

The silver nanoparticles may be prepared by various methods such as mechanical grinding (grinding) method, coprecipitation method, spraying method, sol-gel method, and the like, and preferably, by slowly adding an aqueous solution of a reducing agent and a surfactant to an aqueous silver salt solution. Can be. Examples of the reducing agent include, but are not limited to, hydrazine, NaBH ₄ , LiAlBH ₄ , an oxo compound, or a mixture thereof. In addition, the surfactant may be used in various kinds and concentrations of surfactants in consideration of the size and size distribution of the silver particles, but is not limited thereto, nonionic surfactants, anionic surfactants, cationic surfactants, both Hydrocarbon-based surfactants, silicone-based surfactants or fluorocarbon-based surfactants may be used.

The raw material composition also includes a cell foaming agent for cell opening, a cell regulator, and the like, for producing a highly elastic foam material. Suitable foam stabilizers for this purpose include, for example, one or more foam stabilizers selected from the group consisting of trichlorofluoromethane, chlorine, fluorine, and methane. Cell regulators include olonotin compounds such as stanose octoate. In addition, various kinds of cell regulators may be used depending on characteristics.

The content of the foam stabilizer is preferably 0.1 parts by weight to 50 parts by weight based on 100 parts by weight of the prepolymer, and when the content is less than 0.1 parts by weight, there is a problem in that open cell formation is not good, and the content is not preferable. When the amount exceeds 50 parts by weight, the number of open cells becomes too large and the physical properties deteriorate, which is not preferable.

The content of the cell regulator is preferably 0.1 parts by weight to 20.0 parts by weight based on 100 parts by weight of the prepolymer, and if the content is less than 0.1 parts by weight, the polymerization rate is too slow, which is not preferable, and the content is 20.0. If it exceeds the weight part, it is not preferable because there is a problem that the amount of a regulator which does not participate in reaction is large.

The method for producing an open cell foam material includes a molding step of molding a foam having a predetermined size so that a plurality of elliptical cells are grown and arranged by foaming an open cell foam material, and a predetermined thickness in a uniaxial direction of the cells in which the foam formed in the molding step is grown. It includes a cutting step of cutting in the longitudinal direction of the cell to have a.

In the method for manufacturing a foam member according to the present invention, the molding step of the foam member is started by continuously injecting the raw material composition into the upper portion of the conveyor to form a tunnel, such as a rectangular shape, the injected raw material composition is inside the sidewall of the tunnel Over time, they are foam molded and form a columnar foam. That is, when the raw material composition is foamed to the inlet side of the tunnel sidewall through the foamer head, it gradually expands over time as it moves along the conveyor, which is more swollen than the cream state and thus has a slightly viscous gel state. It is formed into a columnar foam while changing to a tack free state where the viscosity is lost after passing through the gel state. At this time, the carbon dioxide gas is released toward the ceiling of the side wall as the raw material is foamed, so that the open cells inside the foam expand from the bottom to the ceiling to form a foam material containing Ag particles. The final foam material is completed by cutting the molded foam in the forming step in a direction perpendicular to the bottom of the conveyor to have a certain thickness.

It is preferable that the moving time of the raw material composition on the conveyor is 10 minutes to 2 hours, and when the moving time is less than 10 minutes, there is a problem in that the foam is not completely formed, and when it exceeds 2 hours, the working time It is not preferable because it is long and there is a problem in mass productivity.

The present invention provides, in another embodiment, a cartridge for a printing apparatus comprising the foam material. The inside of the cartridge is filled with the antimicrobial foam material prepared according to the present invention. In addition, the printing ink commonly used in the art is filled with the usual content.

The present invention also provides a printing apparatus comprising the cartridge. Such a printing device may include various types of devices such as a printer, a facsimile machine or a multifunction device.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to the following Examples.

Example 1 Preparation of Silver Nanoparticles

5 g of an aqueous solution of 0.04 g of AgNO ₃ dissolved therein while stirring 1.25 g of polyoxyethylene (20 mol) sorbitan monolaurate (Tween 20) as a surfactant and 0.07 g of hydrazine in which a reducing agent was dissolved. Was added slowly. As a result, fine silver nanoparticles having an average diameter of 50 nm were obtained.

Example 2 Preparation of Foam Material According to the Present Invention

Prepolymer produced by reacting 50 g of organic polyisocyanate and 50 g of aromatic monool as a prepolymer, 60 g of polyethertriol as a polyol, 2 g of isocyanate trimerization catalyst as a polymerization catalyst, 2 g of silver nanoparticles having an average primary particle size of 100 nm, and foaming A raw material composition was prepared by mixing 20 g of trichlorofluoromethane as a agent and 3 g of stanose octoate as a cell regulator. The raw material composition was continuously injected into the top of a conveyor in which the sidewalls in the form of a rectangular tunnel (20 cm wide, 20 cm long, 20 cm high) were installed in the longitudinal direction. The injection was moved along the conveyor for 1 hour to form a foam in a tack free state, and the foam was cut into a rectangular columnar shape having a width of 1 m and a height of 1 m with respect to the conveyor bottom. According to the foam material was prepared.

Example 3. Antibacterial Test Results

For cartridges filled with the foam material according to Example 2 and cartridges according to a conventional conventional manner which do not contain silver nanoparticles as a comparative example, solid patterns and halftone pattern images were obtained. Antimicrobial experiments were carried out, and the results as shown in Table 1 below were obtained.

Bacteria Reduction (%) Solid pattern Halftone pattern Example 2 99.8% 99.8% Comparative example 26.0% 26.0%

Antibacterial test was performed as follows. The strain (Staphylococcus aureus ATCC 6538) was incubated in 35 ± 1 ℃ test solution for 24 hours to determine the number of bacteria. The initial bacterial count was 1.4 × 10 ⁵ / ml and after 24 hours of incubation the bacterial count increased to 16.4 × 10 ⁶ / ml. The solution incubated for 24 hours was dropped on paper printed in a solid pattern and a halftone pattern. The size of the paper was 60 cm ² . After 24 hours, the number of bacteria was measured, and the reduced number of initial bacteria was expressed as a percentage as shown in Table 1 above.

From the results of Table 1, it can be seen that the cartridge according to the present invention exhibits superior antimicrobial effects compared to the cartridge according to the prior art, which does not contain silver nanoparticles.

According to the present invention, it is possible to provide a cartridge for a printing apparatus and a printing apparatus employing the same, which not only have antibacterial, deodorizing and sterilizing characteristics, but also can obtain a high quality image without clogging a nozzle.

Claims (15)

A foam material for a cartridge of a printing apparatus, wherein silver nanoparticles having a primary particle size of 30 nm to 100 μm are externally attached. According to claim 1, wherein the content of the silver nanoparticles is a foam material for a cartridge of the printing apparatus, characterized in that included 0.1 to 5.0% by weight based on the total weight of the foam material. delete The foam material according to claim 1, wherein the foam material is a foam material selected from the group consisting of polyester resins, polyurethane resins, amino resins, alkyd resins, phenolic resins, epoxy resins, isocyanate resins, polysiloxane resins, and mixtures thereof. Foam material for cartridges in printing equipment. The foam material for a cartridge of a printing apparatus according to claim 1, wherein the foam material is a polyurethane resin foam material. a) preparing a raw material composition by mixing a prepolymer, a polyol, a polymerization catalyst, silver nanoparticles, a foam stabilizer and a cell regulator; b) continuously injecting the raw material composition onto a conveyor with a tunnel-shaped sidewall installed in the longitudinal direction; c) molding the foam in a tack free state by moving the injection along the conveyor; And d) cutting the foam in a direction perpendicular to the bottom of the conveyor Method for producing a foam member comprising a. The method of claim 6, wherein the raw material composition is based on 100 parts by weight of the prepolymer, 10 to 100 parts by weight of polyol, 0.01 to 20 parts by weight of polymerization catalyst, 0.1 to 20 parts by weight of silver nanoparticles, 0.1 to 50 parts by weight of foaming agent, And 0.1 to 20 parts by weight of the cell regulator. 7. The method of claim 6, wherein the prepolymer is selected from the group consisting of toluene diisocyanate, diphenylene methane diisocyanate and mixtures thereof. The method of claim 6, wherein the polyol is at least one selected from the group consisting of polyester-based polyols and polyether-based polyols. The method of claim 6, wherein the primary particle diameter of the silver nanoparticles is 30 nm to 100 μm. The method of claim 6, wherein the foam stabilizer is at least one selected from the group consisting of trichlorofluoromethane, chlorine, fluorine, and methane. 7. The method of claim 6, wherein the cell regulator is an olonotin compound. The method of claim 6, wherein the moving time of the step c) is 10 minutes to 2 hours. delete delete

Images