KR101155428B1

KR101155428B1 - strong desk having antibacterial function

Info

Publication number: KR101155428B1
Application number: KR1020110109169A
Authority: KR
Inventors: 장진영
Original assignee: (주)나라엔퍼스
Priority date: 2011-10-25
Filing date: 2011-10-25
Publication date: 2012-06-15

Abstract

The present invention relates to a high-strength antimicrobial desk, comprising an antimicrobial top member and a leg member for supporting the top member, the antimicrobial top member is dried wood powder 60 ~ 70% by weight, thermoplastic resin 20 ~ 30% by weight, carbon fiber 1 to 5% by weight, 2 to 3% by weight of the impact modifier, 3 to 5% by weight of the additive prepared by mixing the dough obtained by 80 to 300 ℃, and prepared by extruding the prepared dough, the carbon fiber is an antimicrobial agent, A raw material mixture prepared by mixing 0.01-15% by weight of a mixture of tourmaline, feldspar and titanium dioxide and 85-99.99% by weight of a thermosetting resin powder is prepared in a fibrous form, and the raw material mixture is thermoset and then inert atmosphere. Provided is a high strength antimicrobial desk, which is produced by carbonization.
According to the present invention as described above, there is an effect that can provide a desk having a high strength while excellent in antibacterial compared to the prior art.

Description

High strength antibacterial desk {strong desk having antibacterial function}

The present invention relates to a high-strength antimicrobial desk, and more particularly, to a technique of having an excellent antimicrobial and high strength by adding an antimicrobial agent, carbon fiber, and a strength reinforcing agent to a mixture of wood powder and synthetic resin when manufacturing the upper plate member of the desk.

The desk is a product that is used for a long time while the user's body is in direct contact with it, and when it is used for a long time, the contact part gets sweaty and the temperature rises, causing bacteria to multiply and cause odor or even skin disease. Various measures are being considered.

On the other hand, as the social structure becomes more complex, social members do not know each other, meet as needed, and often use common objects together.

In particular, in the case of a tribute stored in a public place, there are many users and there is no way of knowing the identity of the person who used it before using it, and when using these objects, there may be a case of feeling of discomfort or anxiety.

Since the desk is used to directly contact the upper arm and hand of the user, there is a possibility that the same health and hygiene problems as in the chair when using the desk.

The health and hygiene problems that can be solved when a chair or desk in a public place are shared by many anonymous people are not a matter that can be solved by individual attention. Actions that can ensure the security of the government will be required from the social point of view.

From this point of view, due to the inherent characteristics of the article as a desk and the increase in the case of being used in common according to the change of social structure, it is necessary to develop a desk which can give a more hygienic and comfortable feeling. can do.

In order to solve this problem, the domestic registered utility model No. 20-0301411 has been proposed antibacterial desk, which is shown in FIG.

As shown in Figure 1, the antibacterial desk according to the Utility Model Registration No. 20-0301411

It consists of an antimicrobial top plate member 11 and four leg members 12 supporting the top plate member 11, the antimicrobial top member 11 is mixed with a thermoplastic resin and an antimicrobial agent like the antimicrobial members in the antimicrobial chair It is manufactured by forming an antimicrobial extruded plate by injecting, treating an antimicrobial agent on a surface, or by mixing a thermoplastic resin and an antimicrobial agent and extruding it on the surface.

However, such an antibacterial desk does not provide sufficient antimicrobial performance when extruded with an antimicrobial agent, and when the antimicrobial agent is surface treated, the antimicrobial coating is peeled off by scratch or the antimicrobial performance decreases with time, and the overall strength is reduced. Has a low disadvantage.

In addition, the antibacterial desk has a disadvantage that it is difficult to apply to a desk made of wood as a synthetic resin material.

In addition, MDF, which is often used as a material of a desk, is more economical than wood and can be wrapped in various colors, and in particular, it is used because it is light in weight, but when it is pressed due to heavy load from the upper part of the desk due to its weak strength, There is a problem that is easily broken while this occurs.

The present invention has been made to solve the above problems, an object of the present invention is to provide a high strength and excellent antibacterial by adding an antimicrobial agent, carbon fiber and a strength reinforcing agent to the mixture of wood flour and synthetic resin when manufacturing the top plate member of the desk The purpose is to provide a desk.

In addition, another object of the present invention by applying an antimicrobial coating material containing a carbon fiber to the outer surface of the upper plate member to significantly improve the adhesive force adhered to the outer surface of the upper plate member, but also to improve the antimicrobial properties of the upper plate member The purpose is to provide an antimicrobial desk.

According to an aspect of the present invention for achieving the above object, consisting of an antimicrobial top member and the leg member for supporting the top member, the antimicrobial top member is dried wood powder 60 ~ 70% by weight, thermoplastic resin 20 ~ To prepare a dough obtained by mixing 30% by weight, 1 to 5% by weight of carbon fiber, 2 to 3% by weight of impact modifier, 3 to 5% by weight of an additive at 80 ~ 300 ℃, and prepared by extruding the prepared dough, The carbon fiber is prepared by mixing 0.01-15% by weight of the mixture of the antimicrobial agent, tourmaline, feldspar and titanium dioxide, and 85-99.99% by weight of the thermosetting resin powder, and preparing the raw material mixture in a fibrous form. A high strength antimicrobial desk is provided which is produced by thermal curing and then carbonized in an inert atmosphere.

Here, the antimicrobial agent, tourmaline, feldspar and titanium dioxide are preferably mixed in a weight ratio of 1: 0.1 to 1: 0.1 to 1.

According to another aspect of the present invention for achieving the above object, consisting of an antimicrobial top member and a leg member for supporting the top member, the antimicrobial top member is an antimicrobial agent, mineral powder and thermosetting resin powder on the outer surface A liquid antimicrobial coating material containing carbon fiber prepared using the coating is applied, the antimicrobial coating material is an organic solvent 45 ~ 60% by weight, water-soluble acrylic emulsion polymer 30 ~ 45% by weight, carbon fiber 1 ~ 5% by weight, impact 2 ~ 3% by weight of the adjuvant, 3 ~ 5% by weight of the additives are prepared in a liquid phase, the carbon fiber is mixed with the powder of antibacterial, tourmaline, feldspar and titanium dioxide, the antimicrobial agent: titanium dioxide: tourmaline: feldspar 1: 0.1 ~ 1: 0.1 ~ 1: 0.1 ~ 1 to prepare a mixture mixed, 0.01 to 15% by weight of the mixture and 85 to 99.99% by weight of the thermosetting resin powder to prepare a raw material mixture , The prepared high-strength antibacterial desk to the raw mixture being produced by carbonization in an inert atmosphere after heat cure, is provided.

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According to the present invention as described above, there is an effect that can provide a desk having a high strength while excellent in antibacterial compared to the prior art.

Further, by applying an antimicrobial coating material containing carbon fibers to the outer surface of the upper plate member, the adhesive force adhered to the outer surface of the upper plate member is remarkably improved, but the antimicrobial and deodorizing properties of the upper plate member can be further improved.

1 is a perspective view showing the structure of the antibacterial desk according to the Korean registered utility model No. 20-0301411.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Method for producing a frame member according to an embodiment of the present invention is to mix the powder of the antimicrobial agent, tourmaline, feldspar and titanium dioxide, the antimicrobial agent: titanium dioxide: tourmaline: feldspar in a weight ratio of 1: 0.1 to 1: 0.1 to 1: 0.1 Preparing a raw material mixture by mixing the mixture at a ratio of 1 to 1, preparing 0.01 to 15% by weight of the mixture and 85 to 99.99% by weight of the thermosetting resin powder, and preparing the raw material mixture in a fibrous form and thermosetting Carbonized in an inert atmosphere and then carbonized to produce 60 to 70% by weight of dried wood powder, 20 to 30% by weight of thermoplastic resin, 1 to 5% by weight of carbon fiber, 2 to 3% by weight of reinforcing agent, and 3 to 3% of additive. It comprises a step of preparing a dough obtained by mixing 5% by weight at 80 ~ 300 ℃, extruding the prepared dough to form a frame member and drying the frame member.

Here, the antimicrobial agent is mainly used for the powder of cypress, Nahanbaek, eucalyptus bark, and other inorganic metal antimicrobial agents carrying metal ions having antibacterial activity such as silver, copper and zinc, Aluminosilicate (Zeolite), CalciumPhosphate, ZirconiumPhosphate, SolubleGlass This can be used.

Titanium dioxide functions as a photocatalyst, and photocatalyst is meant to promote decomposition of organic matter by irradiation of light such as ultraviolet rays, and is widely known as a major function of titanium dioxide.

Titanium dioxide is a semiconducting material, and when light above band gap energy is irradiated, electrons and holes are separated and their strong oxidation and reduction reactions decompose difficult-decomposable organic matter, purify air, purify water, and antibacterial. It is widely used in many applications such as action. In addition, titanium dioxide is in the spotlight as an environmentally friendly material because it has superior activity, non-toxicity, and does not erode by acids or bases compared to other photocatalysts. Pure titanium dioxide particles are only photoactive by ultraviolet light. In the case of anatase crystals, the bandgap energy is 3.2 eV, which requires shorter wavelengths of light than 387 nm for electron separation. Photocatalyst is a surface reaction that absorbs organic material and receives light from photocatalyst coated surface and decomposes light, so it is important to coat the surface evenly. However, if the thickness of the photocatalyst is thicker to adsorb organic substances, the adsorption is advantageous. However, the adsorption rate is directly proportional to the concentration of the contaminants. The thickness is appropriate. That is, the indoor pollutant concentration is present in the concentration of several ppm to several hundred ppb, and if the pollutants of this degree, the thickness of about 200nm can be the optimum thickness. If the thickness is such a thin thin film that is difficult to see with the naked eye, it is also a thickness that can preserve the color and texture of the exterior material as it is. Photocatalyst powder other than the photocatalyst coating liquid cannot be coated with a thin film of several hundred nm level when coated in a general manner. The primary particles of the powder are nanosized, but the size of the secondary particles (aggregates) is usually several hundred nm, so when the powder is coated, the coating is bound to the micrometer (μm) level. Therefore, when the powder is coated (fixed), a binder is necessarily required. At this time, the binder mainly used varies depending on the material to be coated (plastic, glass, wood, steel, etc.), but if possible, a binder that is harmless to the human body is used rather than a harmful organic binder. Powder coating is mainly applied to water treatment, air treatment equipment, paint, white system materials that have to deal with high concentration of pollutants. It is known that the titanium dioxide has a high reducing power, has an excellent effect on the purification of sulfur dioxide (SO3), nitrogen oxides (NOx), volatile organic compounds (VOCs) and various odors harmful to the human body, and is excellent in antibacterial effect. have.

Tourmaline is a complex borosilicate of iron, magnesium, alkali metal, and aluminum with hexagonal columnar crystals, which is a natural mineral belonging to the hexagonal system, and is the only substance that generates 0.06㎃ of electricity. Phosphorus has electrical properties. Therefore, tourmaline has a characteristic of constantly applying electricity to the crystal structure itself, and also has an anionic surfactant effect, and the effect is doubled when the temperature is increased to 10 ° C, and even a fine powder does not change its properties. The effect is doubled by one exhibiting electrical properties. In addition, tourmaline is more effective when it comes into contact with moisture in the atmosphere. Electrons accumulated in the negative electrode of tourmaline are discharged at the moment of contact with moisture, and the moisture is electrolyzed into hydrogen ions and hydroxide ions. Hydrogen ions bind to the electrons released by tourmaline and are released as hydrogen atoms. On the other hand, hydroxyl ions combine with water molecules to generate a surfactant, which is the anion pursued by the present invention.

Table 1 shows the results of the test method KICM-FIR-1042 for more accurate anion measurement for the anion-emitting paint using natural minerals developed and produced according to the above configurations and examples. In view of the anion generation rate 1657ions / cc it can be seen that it has a very good effect.

Pyrophyllite is composed of 73.45% of silicon dioxide (SiO2) and 20.5% of aluminum oxide (Al2O3). The content of the two components is very high, and the main constituent minerals are pyrophylite (Al2Si4O10 (OH) 2) and quartz (quartz, SiO2). ) As a mixture of two compounds. Far-infrared emissivity (5-20㎛) was about 0.91 as a result of measuring the radiation at 40 ℃ compared to black body by Fourier transform-infrared spectrometer method. , The radiant energy was found to be 3.65 * 102W / m2.

As a result of measuring the anion by the test method KICM-FIR-1042 for the frame member using the natural mineral developed and produced according to the above-described configuration and example, as shown in Table 1 below, the frame member was generally measured at 1205ions / cc. It can be confirmed that it has a very excellent effect compared to the wood used as.

The first mixing step is to mix the powder of antimicrobial agent, tourmaline, feldspar and titanium dioxide, but the antimicrobial agent: titanium dioxide: tourmaline: feldspar is 1: 0.1 ~ 1: 0.1 ~ 1: 0.1 ~ 1 natural mineral powder of carbon fiber It is included in the manufacturing process of the fixed to the carbon fiber without using a separate adhesive, thereby to fully exhibit the natural, especially antibacterial function of the natural minerals, and at the same time the frame member by the fibrous structure of the carbon fiber By increasing the binding strength with the main components of the natural minerals, such as a large amount of inorganic materials, but also to obtain excellent flexural strength is characterized.

Unless specifically stated otherwise, all mixing ratios used in the present invention refer to content ratios in the total composition, not relative ratios such as percentages, which are determined by the present inventors to obtain an optimum composition through repeated experiments. It is not intended that any particular limitation be placed on the upper limit or the lower limit, only the ratio determined by the inventors' experiments as an optimal ratio for realizing the present invention.

The second mixing step comprises preparing a raw material mixture by mixing the antimicrobial agent: titanium dioxide: tourmaline: 0.01 to 15% by weight of the mixture of leadstone and 85 to 99.99% by weight of the thermosetting resin powder obtained in the first mixing step.

Here, when the natural mineral powder mixture is mixed in less than 0.01% by weight, there may be a problem that the content of the natural mineral is too low, the desired antimicrobial function is insufficient, on the contrary, when the natural mineral powder exceeds 15% by weight, the subsequent fiber forming step There may be a problem in that trimming in Etc. occurs, or the physical properties of the carbon fiber to be finally obtained, in particular, the physical properties of the fiber are lowered.

However, it will be understood by those skilled in the art that the content of the natural mineral powder mixture may be further increased in order to increase the antibacterial function even at the expense of improving the physical properties of the frame member.

Thermosetting resin powder is a carbon source of carbon fiber and is a raw material that is carbonized by carbonization process to carbon fiber.

Although all the conventional carbon compounds can be used as the thermosetting resin powder, it is preferable to use one that can minimize the stability of the process and the impurity content in the obtained carbon fiber, and among these, the conditions can be satisfied. It is more preferable to use those which do not deform even during sintering or carbonization and which have low impurity content.

For example, a novolak-type phenol resin may be used, and it can be easily understood by those skilled in the art that various kinds of thermosetting resins may be used in addition to the phenol resins described above. It can be understood that the thermosetting resin is known to be commercially available and can be used.

The fiber forming step consists of preparing a raw material mixture in a fibrous form, heat curing and carbonizing in an inert atmosphere to produce carbon fibers. The preparation of the raw material mixture in fibrous form is the same as or similar to a conventional fiber manufacturing process. It will be understood very easily by those skilled in the art.

Spinning into fibrous form can be achieved by spinning the raw material mixture through a nozzle of a diameter of about 1.0 mm at a spinning temperature of about 250 ° C.

Carbon fiber production consists of thermally curing a raw material mixture formed in a fibrous form and then carbonizing in an inert atmosphere to produce carbon fibers.

And, in the thermosetting step is heated in the temperature range of 300 to 400 ℃ is thermally cured. This may be referred to as sintering and is a step of treating the powdered raw material mixture in a state suitable for carbonization.

After the thermosetting step, the heat-cured raw material mixture is carbonized by heating in the temperature range of 900 to 1,000 ℃ and anoxic or non-oxidizing conditions in the carbonization step. By this carbonization, the thermosetting resin in the raw material mixture is carbonized.

The temperature range and the like are all known enough to be easily understood by those skilled in the art of producing carbon fibers, and the present invention is not limited thereto. It can be understood that it can be prepared according to the method.

In addition, anoxic conditions or non-oxidizing conditions mean heating in the absence of oxygen, and may be understood to act to increase the carbonization rate in converting the thermosetting resin powder as carbon. Anoxic or non-oxidizing conditions may preferably consist of being carried out in a nitrogen atmosphere.

The upper plate member including the obtained carbon fiber is produced by drying 60 to 70% by weight of wood powder, 20 to 30% by weight of thermoplastic resin, 1 to 5% by weight of carbon fiber, 2 to 3% by weight of strength reinforcing agent, and additives 3 to 5 Preparing a dough obtained by mixing the weight percent at 80 ~ 300 ℃ and extrusion of the mixed dough to produce a molded frame member.

Here, the impact modifier is a component added to prevent cracking, for example, ethylene is preferred, it is preferable to limit to the above range in consideration of agitation.

In this case, the addition of ethylene as an impact modifier means that ethylene itself is not directly added, but is obtained from a liquid substance such as CPE (chlorinated polyethylene), which is currently processed into a resin form and commercially available.

The preparing of the upper plate member including the obtained carbon fiber is performed by first mixing wood flour, carbon fiber, and additives, secondly mixing the thermoplastic resin and the impact modifier, and firstly performing the secondary process. When this is obtained, these are put into a mixer and stirred for about 20 minutes, followed by mixing sufficiently, and finally through extrusion molding.

In this case, the second mixing step of mixing the synthetic resin and the impact modifier is performed separately because the impact modifier does not adhere to the synthetic resin and is stuck to the wood powder when it is mixed with the wood powder to obtain the desired bonding strength and impact reinforcement.

Here, dried wood powder, thermoplastic resins, additives and the like are all known to the frame member manufacturers, it is understood to be known enough to buy and use commercially supplied by leading domestic and foreign manufacturers It can be.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described. The following examples are intended to illustrate the invention and should not be understood as limiting the scope of the invention.

Example 1

(1) Preparation of Carbon Fiber

Antimicrobial agent: Titanium dioxide: tourmaline: feldspar is mixed in a weight ratio of 1: 0.5: 0.5: 0.5 to obtain a natural mineral powder mixture, and mixed with 1% by weight of this natural mineral powder mixture and 99% by weight of phenol resin, As the phenol resin, a novolak-type phenol resin dissolved in acetone was used. This was spun at about 250 ° C. through a 1.0 mm nozzle to form a fibrous shape.

The fibrous phase thus prepared was again thermally cured at 350 ° C. for 2 hours, and then carbonized by heat treatment at 950 ° C. for 30 minutes in a nitrogen atmosphere to prepare a phenol resin carbon fiber. The phenolic resin-based carbon fibers have been found to involve some activation in the carbonization process.

(2) Preparation of the top plate member

60% by weight of dried wood powder, 30% by weight of thermoplastic resin, 2% by weight of carbon fiber, 3% by weight of strength reinforcing agent, 5% by weight of additives were mixed at 200 ℃, and the mixed dough was extruded to form a molded frame member.

Comparative example

60% by weight of dried wood powder, 30% by weight of thermoplastic resin, 2% by weight of antimicrobial agent, 8% by weight of additives were mixed at 200 ° C, and the mixed dough was extruded to prepare a molded top plate member.

Experimental Example

The test results of the bending strength of the upper plate member according to the KS F 3200-2006 test method for the Comparative Example and Example are shown in Table 2, and as shown in Table 2, the bending strength (N / mm ² ) of the Comparative Example is 24.2 On the contrary, the Example was 38.7, which shows that the flexural strength is excellent compared to the prior art.

Looking at the manufacturing method of the antimicrobial coating material coated on the outer surface of the upper plate member according to another embodiment of the present invention.

First, (1) the powder of the antimicrobial agent, tourmaline, feldspar and titanium dioxide is mixed, but the weight ratio of the antimicrobial agent: titanium dioxide: tourmaline: feldspar is 1: 0.1 ~ 1: 0.1 ~ 1: 0.1 ~ 1: (2) preparing a raw material mixture by mixing 0.01 to 15% by weight of the mixture and 85 to 99.99% by weight of the thermosetting resin powder, and (3) carbonizing the raw material mixture in a inert atmosphere after carbonization. (4) 45 to 60% by weight of the organic solvent, 30 to 45% by weight of the water-soluble acrylic emulsion polymer, 1 to 5% by weight of carbon fiber, 2 to 3% by weight of the strength reinforcing agent, and 3 to 5% by weight of the additive Mixing the liquid phase and applying the prepared liquid antimicrobial coating material to the surface of the frame member.

Here, the step of mixing the powder of the antimicrobial agent, tourmaline, feldspar and titanium dioxide, preparing the raw material mixture and preparing the carbon fiber are the same as the steps of the frame member, so a detailed description thereof will be omitted. ~ 60% by weight, water soluble acrylic emulsion polymer 30 ~ 45%, additives 5 ~ 10% by weight are all known to the manufacturers of coating materials, can be purchased and used commercially supplied by leading domestic and foreign manufacturers It will be understood that it is known enough.

Meanwhile, the antimicrobial coating material prepared in this way includes the natural mineral powder mixed with the antimicrobial agent: titanium dioxide: tourmaline: feldspar in a weight ratio of 1: 0.1-1: 1.0.1-1: 1.0.1-1. Durability is improved to not only protect the frame member from external forces for a long time, but also to improve the natural function of natural minerals, in particular, antibacterial function.

Since the rest of the structure is the same as the above-described basic embodiment, the rest of the description will be omitted.

As a result of the experiment, the liquid antimicrobial coating material of the present invention was applied to the frame member, dried for 2 days, and drawn with a nail. As a result, membrane damage caused by nail was not found in the example. Partial damage has been shown to occur.

In particular, in the case of the embodiment, the solid membrane is strongly retained antimicrobial agent or mineral powder component, and even if time passes for a long time, the amount of anion or far-infrared ray is almost unchanged. This excellence could be confirmed.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.

11: top plate member 12: leg member

Claims

It is composed of an antimicrobial top plate member and a leg member for supporting the top plate member,
The antimicrobial top plate member
Dough obtained by mixing 60 to 70% by weight of dried wood powder, 20 to 30% by weight of thermoplastic resin, 1 to 5% by weight of carbon fiber, 2 to 3% by weight of impact modifier, and 3 to 5% by weight of additive at 80 to 300 ° C. To prepare, and prepared by extruding the prepared dough,
The carbon fiber is
A raw material mixture prepared by mixing 0.01-15% by weight of a mixture of an antimicrobial agent, tourmaline, feldspar, and titanium dioxide and 85-99.99% by weight of a thermosetting resin powder was prepared in a fibrous form, and the raw material mixture was thermally cured. High strength antimicrobial desk, which is produced by carbonization in an inert atmosphere.

The method of claim 1,
High-strength antimicrobial desk, characterized in that the antibacterial agent, tourmaline, feldspar and titanium dioxide are mixed in a weight ratio of 1: 0.1 to 1: 0.1 to 1.

It is composed of an antimicrobial top plate member and a leg member for supporting the top plate member,
The antimicrobial top plate member
A liquid antimicrobial coating material containing carbon fiber manufactured using an antimicrobial agent, mineral powder and thermosetting resin powder is applied to the outer surface,
The antimicrobial coating material
45 to 60% by weight of organic solvent, 30 to 45% by weight of water-soluble acrylic emulsion polymer, 1 to 5% by weight of carbon fiber, 2 to 3% by weight of impact modifier, 3 to 5% by weight of additives are prepared in a liquid state,
The carbon fiber is
Prepare a mixture of the antimicrobial agent, tourmaline, feldspar and titanium dioxide powder, the antimicrobial agent: titanium dioxide: tourmaline: feldspar in a weight ratio of 1: 0.1 to 1: 0.1 to 1: 0.1 to 1, and the mixture A high-strength antimicrobial desk comprising a mixture of 0.01 to 15% by weight and 85 to 99.99% by weight of the thermosetting resin powder to prepare a raw material mixture, and thermally curing the prepared raw material mixture and carbonizing in an inert atmosphere.

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