KR20110075725A - Resin composition for antimicrobial ventilation duct - Google Patents

Abstract

PURPOSE: A resin composition for an antimicrobial ventilation duct is provided to prevent the generation or corrosion of molds on inner surfaces of ventilation ducts even if the resin composition is used for a long time, and to improve the stability of ventilation ducts. CONSTITUTION: A resin composition for an antimicrobial ventilation duct includes 99.0~99.8 weight% of a synthetic resin and 0.2~1.0 weight% of polyhexamethyleneguanidine phosphate. The synthetic resin is one selected from the group consisting of a polyethylene resin, polyvinyl chloride resin, and acrylonitrile-butadiene-styrene resin. The molecular formula of polyhexamethylene guanidine phosphate is (C7H15N3) n · xH3PO4.

Description

Resin composition for antibacterial ventilation duct {RESIN COMPOSITION FOR ANTIMICROBIAL VENTILATION DUCT}

The present invention relates to a resin composition for the antibacterial ventilation duct, and more particularly, it is installed on the ceiling of the building to allow the indoor air to be discharged to the outside and the outside air to enter the room and at the same time the cold outside Thermal stability and the thermal stability of the duct (Duct) applied to the total heat exchange type ventilator configured to exchange heat between the air and the warm interior air or the resin composition used for the manufacture of various ventilation ducts introduced into the room. By containing water-soluble polymer biocide with corrosion resistance and broad antibacterial spectrum, it can remove various bacteria in the air entering or exiting the room through the ventilation duct during ventilation. At the same time, even if it is used for a long time, it does not cause mold on the inner surface of the ventilation duct. And it relates to a resin composition for the antibacterial ventilation duct to significantly improve the stability.

In general, the air in the closed space is contaminated by carbon dioxide generated during the breathing of people living in the space as time passes if periodic ventilation is not performed, and inhibits the respiratory action of the residents, There is a problem in that it does not maintain a pleasant state because the odors are not discharged and remain in the indoor space.

Accordingly, the space used by many people such as various offices should be periodically ventilated to maintain the oxygen content in the air at a constant level.

For such ventilation, a ventilation device using a total heat exchange method is generally applied to a building. The ventilation device of the heat exchange method is installed on a ceiling of a building so that indoor air is discharged to the outside and outside air is introduced into the room. In order to exchange heat between the cold air flowing from the outside and the warm air discharged from the inside of the room, the air flowing into the room is introduced into a warm state to supply the outside air and exhaust the indoor air. It is a ventilation device.

In the case of the ventilation duct applied to the total heat exchange type ventilation device or the general ventilation device, it is mainly manufactured by injection molding of PVC resin (Polyvinyl Chloride resin) or ABS resin (Acrylonitrile-Butadiene-Styrene resin). In the case of manufacturing the ventilation duct using only the composition, there is a problem that various bacteria contained in the air introduced into the room from the outside or the air discharged from the room to the outside cannot be sterilized and removed.

In particular, if the installation period of the ventilation duct is prolonged, moisture is present inside the ventilation duct due to condensation occurring between the outside temperature and the indoor temperature, and mold is generated on the inner surface of the ventilation duct. In this situation, when the outside air is introduced into the room through the ventilation duct, there is a risk that people living in the room are exposed to various respiratory diseases by fungi or various bacteria contained in the inlet air.

In order to prevent this problem, the mold generated on the inner surface of the ventilation duct must be frequently removed, which is cumbersome, and since the ventilation duct is mainly installed inside the ceiling of the room, the workability of cleaning and removing the mold is very poor. There is.

The present invention is to solve such a conventional problem, the purpose is to be installed on the ceiling of the building to let the air in the room to be discharged to the outside and the outside air to enter the room at the same time cool outside air and warm inside Thermal stability and corrosion resistance in the duct applied to the total heat exchange type ventilator configured to exchange heat between the air of the air or the resin composition used for the manufacture of various ventilation ducts introduced into the room. New antimicrobial ventilation to remove various bacteria in the air entering or exiting the room through the ventilation duct during the ventilation operation by containing a water-soluble polymer biocide with a wide range of antibacterial spectrum and antibacterial spectrum It is to provide a resin composition for ducts.

Another object of the present invention is to provide a new antimicrobial ventilation duct resin composition which can greatly improve the hygiene and stability in use by preventing mold or corrosion on the inner surface of the ventilation duct even after long-term use.

In order to achieve the above object, the resin composition for the antibacterial ventilation duct according to the present invention is any one synthetic resin selected from PE resin (Polyethylene resin), PVC resin (Polyvinyl Chloride resin), ABS resin (Acrylonitrile-Butadiene-Styrene resin) 99.0 to 99.8% by weight and molecular formula (C ₇ H ₁₅ N ₃ ) n. Polyhexamethyleneguanidine phosphate (PHMG), which is xH ₃ PO ₄ , has 0.2 to 1.0% by weight.

According to the present invention, PHMG, which is a water-soluble polymer biocide having thermal stability, corrosion resistance, and broad antimicrobial spectrum, is determined in a PE resin, a PVC resin, or an ABS resin composition. In order to manufacture the ventilation duct installed inside the ceiling of the building by injection molding in the state of mixing and evenly mixed, it passes through the ventilation duct through the ventilation duct during the ventilation action by the sterilization action of the polymer disinfectant added to the resin composition. Alternatively, various germs in the discharged air can be sterilized and removed to prevent diseases of people living in the indoor space in advance.

In addition, in the case of the ventilation duct made using the resin composition according to the present invention, even if a long time passes, the mold does not occur on the inner surface of the ventilation duct, as well as corrosion does not occur, so that the hygiene and stability in use are greatly improved. There is.

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

The present invention allows to remove various bacteria in the air flowing into or out of the room through the antibacterial ventilation duct during the ventilation action and at the same time to prevent mold or corrosion on the inner surface of the ventilation duct even if used for a long time. The hygiene and stability are to be greatly improved.

To this end, the main material of the resin composition for the antibacterial ventilation duct according to the present invention is PE resin, PVC resin or ABS resin of acrylonitrile-butadiene-styrene copolymer is applied at 99.0 to 99.8 wt%, and polyhexamethylene as a polymer disinfectant. Guanidine phosphate (PHMG) is added at 0.2-1.0 wt%.

Polyhexamethyleneguanidine phosphate [IUPAC name: Poly (iminocarbonimidoylimino-1,6-hexanediyl), phosphate] added as the polymer fungicide is a molecular formula (C ₇ H ₁₅ N ₃ ) n. It is a water-soluble polymer fungicide with xH ₃ PO ₄ , which has thermal stability and corrosion resistance, is low in toxicity and has no irritation and sensitivity to skin in particular, and contains no heavy metals or halogens. Known.

In addition, the PHMG applied to the present invention is reported to have a broad antimicrobial spectrum against various fungi, such as bacteria, fungi, algae, as shown in Table 1 below.

Table 1. Comparison table of antimicrobial properties of PHMG applied to the present invention

Bacteria Type MIC
(ppm) Fungi class MIC
(ppm) Algae Class MIC
(ppm) Bacillus subtil 8 Candida albicans 8 Aulosira laxa One Escherichia coli 4 Rhodotorula rubra 16 Chlorella vulgaris One Salmonella typhimurium 4 Cryptococcus neoformans 16 Nostoc linckia 2 Pseudomonas aeruginosa 8 Saccharomyces cerevisiae 8 Nostoc commune 2 Proteus vulgaris 16 Fusarium oxoporum 16 Nostoc muscorum 4 Staphylococcus aureus 8 Trichophyton mentagrophytes 8 Nostoc sp. One Spherotilus
natans 8 Cladosporium resinae 4 Nostoc epllipsosporum One Beggiatoa alba 8 Aspergillus niger 32 Tolypothrix tenuis 2

Example

The antimicrobial properties of the PE resins having the antimicrobial properties evenly mixed by adding 0.5% by weight of PHMG to 99.5% by weight of the PE resin were measured, and the results are shown in Table 2 below.

Table 2. Comparison of Antibacterial Properties of PHMG Treated PE Resin

sample blank untreated Antibacterial PE treated with PHMG 0.5% by weight Number of organisms (cfu / ml) 5.4 × 10 ⁶ 4.2 × 10 ⁶ <10 % Reduction - 21.8 > 99.9

As the test sample in the antimicrobial properties test was used antibacterial PE resin treated with 0.5% by weight PHMG.

Shake Flask Method (FC-TM-19, FITI, SEK) was applied as a test method, and Escherichia coli, an Escherichia coli, which accounts for most of the enterobacteria living in the gut of humans or other animals, as a test organism. (ATCC 25922) was used and the inoculum concentration (cfu / ml) was 1.2 × 10 ⁵ (initial).

The populations of the initial E. coli As shown in Table 2 is the view for the first 5.4 × 10 ⁶ cfu / ㎖ of 21.8% reduction rate is reduced to 4.2 × 10 ⁶ cfu / ㎖ The PE resin is not treated with PHMG from the comparison, In the PE resin added with 0.5% by weight of PHMG according to the present invention it can be confirmed that the antimicrobial properties are reliably shown by reducing to less than 10cfu / ㎖ showing a reduction rate of more than 99.9%.

The antimicrobial resin composition according to the present invention is not only applied to synthetic resins for ventilation ducts, but also applicable to various foams or rubber products applied to the manufacture of products requiring antibacterial function.

Claims (1)

99.0 to 99.9 wt% of synthetic resin selected from PE resin, polyvinyl chloride resin, ABS resin (Acrylonitrile-Butadiene-Styrene resin) and molecular formula (C ₇ H ₁₅ N ₃ ) n. Polyhexamethyleneguanidine phosphate (PHMG) phosphorus xH ₃ PO ₄ A resin composition for antibacterial ventilation ducts, characterized in that consisting of 0.2 to 1.0% by weight.