JPS588530A - Disinfectant air filter material - Google Patents

Abstract

PURPOSE:To obtain an inexpensive light weight disinfectant ultrahigh capacity air filter which is easily handled and prepared simply, by covering at least one surface of the ultrahigh capacity air filter with a thin layer of a disinfectant metal. CONSTITUTION:At least one surface of an ultrahigh capacity air filter such as one formed by processing fine glass fiber into a filter paper like form is subjected to vacuum vapor deposition treatment by using copper, silver, copper and silver or one mixing with tin in those metals to be covered with a disinfoectant metal. Because the vacuum vapor depositied metal is ionized and present in an activated condition and has strong sterilizing power, when thus obtained disinfectant filter material is used, bacteria colleted to the air inflow side of the filter is sterilized and there is no fear of propagation of bacteria in the collecting surface of the filter and invasion of bacteria to the air outflow surface thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a germicidal air filter material, and more particularly to an air filter material which is coated on at least one side of the air filter material with a thin layer of germicidal metal by vacuum deposition.

RJ, advanced biotechnology, etc. in hospital operating rooms and intensive care wards.
A clean room is required.

Dust-free and sterile air must be supplied to these rooms.
As the middle stage, an ultra-high performance air filter is used. The trapped bacteria and dust accumulate on the air inflow side of this filter, which also promotes the growth of bacteria, so the filter collection also becomes a breeding ground for bacteria. At the same time, the filter's air resistance (pressure loss) increases and its lifespan is shortened. In addition, bacteria gradually penetrate the air outflow mc of the filter and eventually become ζ7 mixed into the air.

In order to solve such problems, it has been conventional practice to use an ultraviolet 1m9 lamp or the like in conjunction with an air filter and irradiate the air inflow surface with a single beam of light. However, the filter manufactured by this sterilizing light irradiation method is equipped with a sterilizing lamp, a wiring board, and other accessories inside the filter, making the filter extremely bulky. Moreover, it is heavy and costly.

An object of the present invention is to provide a sterilizing ultra-high performance air filter tIl that is lightweight and easy to handle. Another object of the present invention is to provide a germicidal, ultra-high performance air filter that is easy to manufacture. A further object of the present invention is to provide an inexpensive, sterilizing, ultra-high performance air filter.A further object of the present invention is to provide an air filter that has sterilizing performance over the entire surface of one material. (be.

The ultra-high performance air filter furnace material used in the present invention is, for example, a furnace material that is made by processing fine glass fibers with a diameter of about 1 liter or less into a filter paper shape by known means, and which is generally commercially available. (Hepa filter material).The dust collection efficiency riD is 0.9 for monodispersed particles of P, α3μ diameter.
a97% or more.

At least one side of this ultra-high performance air filter furnace material is coated with a thin layer of sterilizing metal by means such as vacuum deposition. rt during metal deposition, ventilation resistance as an air filter material (
The amount of evaporation is set so as not to impair functions such as pressure loss. As the metal, steel, silver, a combination of copper and silver, or a mixture of these and tin is used. Vacuum-deposited metals are ionized, so they are in an activated state.

Metals in the activated state 11 are said to have strong sterilizing power 1. Among these, it is considered to be effective against fungi such as steel, especially mold. Silver is considered to be effective when the ambient temperature is high because it is easily ionized. When steel and silver are used together by means such as alloying, does silver have a bactericidal effect on steel? Because it functions as a catalyst,
A synergistic effect on bactericidal activity may be observed. What is the ratio of steel and silver to tin?

For example, it is arbitrarily selected based on the distribution of microorganisms present in the atmosphere in which the air filter is used.

The sterilization mechanism of tin is somewhat different from that of copper or silver. Although tin itself does not have much bactericidal properties, it was found that when used in combination with steel, it exerts a sand bactericidal effect. It is thought that tin becomes organic tin when it comes into contact with microbial cells killed by the sterilizing power of steel. It is already known that organic tin has strong bactericidal properties.

An experimental example using the germicidal ultra-high performance air filter of the present invention is shown below.
sprayed into a sterile air stream. This M, coli
Entrained air flow, unmetalized air filter paper (vs. JL), copper vaporized coral air filter 1 paper, silver vaporized air filter paper, $ and copper and silver vaporized air filter paper top C I passed each. Each piece of paper to which Co11 was deposited was taken from the filter, left for a predetermined period of time to receive the bactericidal action of the deposited metal E and Co11C, and then exposed to a diluted solution. This diffusion liquid tube was added to a normal culture medium and cultured under normal conditions, and then the number of bacteria was counted from the growing colonies. The contact time of L Co11 with the vapor-deposited metal and the number of bacteria are shown in Table 1.

Table 1 Co11 (Relative Humidity 9h y Experimental Example λ The experiment was conducted under the same conditions as Experimental Example 1 except for the use of sterile air flL with a relative humidity of 16. Show the results.

In Table S3, Co11 (relative filI & 1Is) experimental examples & E as microorganisms, 3t1kyl・C・
Experimental example 1 except for using CC 5aut@ims
The experiment was conducted under the same conditions as . The results are shown in Table 3.Table 3 5tapk, agrews (relative humidity FELL1) Experimental Example ζ E as microorganism, Aspergil instead of Co11
The experiment was conducted under the same conditions as in Experimental Example 1 except that lusnig@r was used. Table 4 shows the results.

Table 4 ^sp, night (relative wet soap 9SIG) L Co11 q) as a microorganism CKl eyelid bsi electric 11m
The experiment was carried out under the same conditions as the inverted experiment except that pme--11t'ft was used. Result 1 5th llc
show.

As a microorganism in the table, Camdids is the representative of C01i.
The experiment was conducted under the same conditions as in the multiple experiments except that 5LbL-C s'gr was used. The results are shown in Table 6.

Table 6 Cxs>di, mlbicams (relative humidity [96
1) E as a microorganism, 4CBacil instead of Ce1i
All experiments were conducted under the same conditions as in Experiment 1 except that lus cer-C was used. Table 7 shows the results.

Table 1 1” 11 As a microorganism, A pass @rgil1 in the 9th generation of Ce1l
For the wsl gift meeting, IIA gold-plated dissimilar metals are used instead of steel, silver, and steel and silver base metals for steel and tin and steel, silver and tin alloy tubes - 9 others are 1! The experiment was conducted under the same conditions as experiment f11. The results are shown in Table 8.

@8 table ^sp, niger (relative humidity [961) or more

Claims (1)

[Claims] 1. A sterilizing material in which at least one side of an air filter material is coated with a thin layer of sterilizing metal using a vacuum deposition method. Afilter material. 2. The air filter material according to claim 1, wherein the metal is at least one selected from the group consisting of steel, silver, #, and steel and bales. The air filter material according to claim 1, wherein the metal is at least one selected from the group consisting of steel, tin, silver, and tin, and steel, silver, and tin.