KR20050009129A - Filter material treated by nano silver - Google Patents

Abstract

PURPOSE: To provide a filter materials treated by nano-silver, which is able to completely sterilize bacteria, fungi, mite and the like and deodorize odors and has excellent functionality and durability regarding external environment such as light source, humidity and temperature. CONSTITUTION: In a filter material that is prepared by treating non-woven fabrics with a solution comprising nano-silver particles and other additives, silver ions having sterilizing and antibacterial functions is placed at an inner cell of a cell membrane, fine porous silica having a deodorizing function is placed at an outer cell of the cell membrane, and the silver ions are gradually released to the outside of the cell membrane as time passes.

Description

Filter material treated by nano silver

The present invention relates to a filter medium treated with nanonized silver. More specifically, the filter media treated with nano silver having excellent sterilization, deodorization and antibacterial performance, far infrared radiation and anion emission efficiency, mounted on a human face mask as well as an air purifier filter for home or a cabin filter for automobile interior cleaning. It is about.

Recently, more and more people working at home or in the building complain of various health problems. This symptom is found to be caused by indoor air pollution. Indoor air pollution is quite serious not only in homes and buildings, but also underground. Indoor environmental problems, a new environmental field, can appear in various ways in a human-dominated life, and can occur naturally by polluting indoor air quality due to the release of various pollutants generated by human activities. In order to maintain a comfortable indoor environment after recognizing the seriousness of indoor air pollution, the necessity and dissemination of a new concept of ventilation culture with a new concept of maintaining perfect indoor ventilation facilities and the necessary indoor conditions above all is necessary. This is urgent.

On the other hand, as the road environment becomes worse along with the increase in the amount of automobile production, the driver and passengers using the vehicle need to maintain a comfortable indoor environment. In fact, the air flowing around the road and into the car contains many types of particulate matter such as pollen, asbestos particles, heavy metals, bacteria, road dust, and various harmful meteorological substances such as ozone, benzene, and toluene. Skin allergy upon prolonged exposure to those particles having a particle size of less than 3 microns. Respiratory diseases, eye diseases, kidney disease, etc. If the interior of the car is the worst in this atmosphere and the fine particles generated during driving are accumulated in the car, the removal of these fine particles is weak due to the inflow of air and the opening of the car window. If the external environment is poor, for example, in a dirt road or a heavy traffic area, the pollution of the interior of the car may be more severe, which not only causes discomfort to the driver and passengers, but also causes various diseases.

In order to solve these problems, the interest in the development of air purifiers for indoor air purification has become a great concern, and recently, many large companies as well as small and medium-sized companies are producing various functional air cleaners. Many antibacterial cabin filters have been introduced for removal, but external air pollutants, dust accumulated on the floor, clothes and shoes of passers-by, smokers, smoking, etc. There are problems such as failure to effectively block internal pollutants generated from building materials and the like or insufficient removal of bacteria or molds that can be proliferated by moisture.

On the other hand, if silver is made into a nano state, it has strong bactericidal and antimicrobial properties. Nanonized silver (Ag) can sterilize about 650 kinds of bacteria and viruses, and it is known to have a very good effect on fungi, as well as Staphylococcus aureus, pneumococcus, Escherichia coli, Pseudomonas aeruginosa, and MRSA. It is effective to sterilize various germs harmful to human body within 30 minutes. However, the existing nano-silver is in the form of a mixture of silver ions (Ag ⁺ ) and silica (SiO ₂₎ , or a combination of silver ions in various places of the silica does not have the function of the nano-silver due to the external environment. There is a tendency that color change (yellowing, etc.) occurs quickly by light source or ozone within a short time.

In addition, when the nano silver is deposited on the fiber fabric, the nano silver is not uniformly deposited on the fiber fabric by instantaneous heat supply, but is concentrated on the front and back surfaces of the fiber fabric, and thus durability tends to be lowered.

The present invention has been made to solve the problems described above, the object of the present invention is a non-woven fabric having excellent permeability and low pressure loss to collect dust contained in the outside air as a main raw material, sterilization, deodorization And by processing nano silver particles with excellent antimicrobial power, they live inside the air purifier or car cabin filter to generate severe odors and almost completely sterilize and deodorize bacteria, molds, and mites that are harmful to human body. It is to provide a filter medium having excellent functionality and durability against light sources, humidity, temperature, etc.).

Another object of the present invention is to preliminarily heat treatment with an IR dryer to prevent the phenomena of the nanonized silver in the fiber fabric to prevent the ubiquitous phenomenon of the nanoparticles of silver particles in the fabric fabric, Treatment with a pin tenter at high temperature provides a uniform and durable filter media.

Still another object of the present invention is to provide a filter medium having antibacterial, deodorizing and sterilizing performance which can be used together with a filter of an air cleaner installed in a home or office.

1 is a model diagram showing the nano-silver used in the present invention,

2 is a model diagram showing a conventional nano-silver,

3 is a process chart of the manufacturing method of the filter media used in the present invention.

<Explanation of symbols for the main parts of the drawings>

10 ---- Nano Silver (Ag) 11 ---- Silica (SiO ₂ )

12 ---- Impregnation 13 ---- Mangle

14 ---- IR Dryer 15 ---- Pin Tenter

The filter medium according to the present invention is composed of nonwoven fabric and nanonized silver particles having excellent air permeability and low pressure loss, wherein the nanonized silver particles added to the nonwoven fabric are 3 to 70% by weight, and other additives are 1 to 10% by weight. %, And other additives for the stability of the nanonized silver is used as a dispersant, antifoaming agent, aqueous polyurethane, pH adjuster.

Nano-silvered silver used in the present invention is a silver ion (Ag ⁺ ) is located inside the cell membrane (cell membrane) _, and by modifying the silica (SiO ₂₎ and aluminum (Al) fine pores on the outside of the silver ion (Ag ⁺ ) To form a film. Therefore, antimicrobial and bactericidal action is realized on bacteria, mites, molds, etc. made of proteins or nucleic acids (DNA) by silver ions gradually released from the inside of the cell membrane, and deodorizing performance is achieved by silica having a fine porosity. It can obtain and it can prevent discoloration by a light source.

The filter medium containing the nano silver particles of the present invention is a filter material treated using a non-woven fabric having excellent air permeability and dispersed nano silver particles, and the silver ions contained in the filter medium are various functional groups (R) that form proteins and nucleic acids. -SH, R-SS-R and R-NH, etc.) interferes with the replication of the nucleic acids, inhibits the proliferation of bacteria with proteins, the filter medium is a filter medium that does not destroy the cell membrane by external pressure, antibacterial Excellent deodorant, far infrared ray emission and bactericidal.

The filter medium according to the present invention may contain special additives to improve durability, breathability, antistatic properties, and the like. Examples of additives that can be used for this purpose include polyacrylate dispersants, silicone antifoaming agents, aqueous polyurethanes, and pH adjusters for the stability of nanoscaled silver, which additives are used in amounts of 1 to 5% by weight. If the amount of the additive is less than the above range or above the range may cause problems in durability, breathability and pressure loss of the filter medium.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Example 1

Hereinafter, the composition and manufacturing method of the filter medium containing nano silver will be described in detail with reference to the accompanying drawings.

Figure 1 of the accompanying drawings is a schematic diagram showing the nano-silver used in the present invention, Figure 3 is a process chart of the manufacturing method of the filter media used in the present invention.

After dispersing the nanoparticles of silver (10) particles and additives as described in Table 1 and FIGS. 1 and 3 well in the impregnation tank 12, the nonwoven fabric was treated with this dispersion, and then the uniformity of the solution in the fabric After the pre-heat treatment with an IR dryer 14 for deposition, it is treated with a pin tenter 15 at a high temperature to produce a filter medium. In FIG. 1, reference numeral 11 is silica, and in FIG. 3, reference numeral 13 is mangled.

Table 1

100 parts by weight of distilled water

20 parts by weight of nanonized silver

5 parts by weight of aqueous polyurethane

Dispersant 3 parts by weight

Defoamer 0.1 wt%

pH regulator 0.5 wt%

The filter media of the present invention, in which nanonized silver is specially processed into fine particles (100 nm), dissociates silver ions having strong oxidizing power more easily, thereby stopping the function of necessary enzymes such as viruses, bacteria, and fungi, and asphyxia. This is to prevent the sterilization of the germ metabolism, as well as the electrical load of the silver released from the metal has the effect of inhibiting the germ function of the germ, the filter media thus produced has the following advantages.

First, the filter medium according to the present invention is excellent in functionality because it is uniformly deposited in the filter medium by the heat treatment by the IR dryer and the pin tender.

second. The filter medium according to the present invention is structurally more stable than the existing silver nanonized so that it can be used for a long time.

Third, the silver nanonized (Ag) used in the filter medium according to the present invention has a sterilizing power tens of times stronger than the chlorine series, and is harmless to the human body.

Claims (4)

In the filter medium by impregnating a nonwoven fabric with a solution composed of nanoparticles of silver particles and other additives, silver ions (Ag ⁺ ) having bactericidal and antibacterial properties are placed in the inner cells of the cell membrane. Silica (SiO ₂ ) having a fine porous deodorizing function is placed in the outer cell, the filter medium having excellent bactericidal, antibacterial and deodorizing ability is characterized in that the silver ions placed in the inner cell is released to the outside over time. The filter medium according to claim 1, wherein in order to uniformly deposit the solution on the nonwoven fabric, the nonwoven fabric impregnated with the solution is subjected to a preliminary heat treatment with an IR dryer, followed by treatment with a pin tender at a high temperature. The filter medium according to claim 1, wherein the other additives are a dispersant, an antifoaming agent, an aqueous polyurethane, and a pH adjusting agent. The filter media for household air cleaners and automobile cabin filters in which an electrostatic filter filled with static electricity and an activated carbon filter impregnated with activated carbon are combined with the filter media manufactured in claim 2.