JPH0117232Y2 - - Google Patents

Description

[Detailed explanation of the idea]

Industrial Application Field The present invention relates to a disposable dust collection bag used in a vacuum cleaner.
Provides performance that prevents indoor contamination caused by microorganisms that grow using dust as a nutrient source and scatter into the air after passing through the dust collection bag, and also prevents bad odors that occur as a result of microbial growth. This relates to dust collection bags. BACKGROUND ART In recent years, disposable paper bags have been increasingly used in vacuum cleaners because they are easier to dispose of dust. Conventionally, this type of dust collection bag was made of materials such as filter paper, which were cut into a predetermined shape, folded, and glued together at the necessary points to form a bag shape. . However, the material for the filter paper is paper manufactured by the normal wet papermaking method, which also includes raw materials such as waste paper, is inexpensive, and has the necessary tensile strength, air permeability, and void density. Other than that, it did not have any special performance. However, suction-type vacuum cleaners have a mechanical feature in that the airflow created by the blower always passes through the dust collector inside the vacuum cleaner before being discharged to the outside of the vacuum cleaner. Due to this structure, the discharged air is accompanied by unexpected harmful effects. That is, although a considerable number of microorganisms such as bacteria, yeast, and mold spores are trapped in the micropores in the filter paper and are prevented from being discharged,
Microorganisms with relatively small cells easily pass through the gaps in the filter paper and are released to the outside, easily contaminating the indoor air. On the other hand, microorganisms caught in the filter medium multiply repeatedly using the organic matter in the dust as a nutrient source, and as a result, they produce various malodorous substances including ammonia, which spreads the malodor into the room. There are many examples of improvements to dust collection bags for vacuum cleaners, such as Japanese Patent Application Laid-Open No. 128121/1983, in which the bag is improved to prevent dust from spilling when the bag is attached/detached, or Japanese Patent Application Publication No. 1983-12812. Although there are some devised methods such as the one in Publication No. 2935, which increases the adhesive strength between the paper bag and the mouth core and prevents it from tearing easily, the present invention focuses on the presence of microorganisms in dust and shows that this is a harmful effect. There are no examples of attempts to make improvements that would prevent this. There are also paper bag supports used in vacuum cleaners impregnated with insect repellent and microbial insecticides.
However, in the above-mentioned paper bag filter, a part of the paper filter is coated with or impregnated with insect repellent and microbial insecticide, and the purpose is to prevent the propagation of collected harmful microorganisms such as mites and their escape from the paper bag. Suction-type vacuum cleaners are still unable to achieve sufficient effects in inhibiting the growth of microorganisms such as bacteria and fungi, and preventing contamination and bad odors associated with the discharged air. In view of these conventional drawbacks, the present invention provides a dust collection bag for a vacuum cleaner that can proactively suppress the growth of microorganisms on the dust collection bag, thereby preventing microbial contamination of exhaust air and generation of bad odors. It is something to do. Problems to be solved by the invention This invention filters the airflow caused by an electric blower,
A bag-like body formed with a dense filter material having sufficient air permeability and flexibility to collect dust, and cardboard for supporting the opening of the bag-like body at an inlet through which air flows. A dust collecting bag for a vacuum cleaner is constituted by a support portion formed of a material such as the like, and at least 20% by weight of the filter medium constituting the bag-like body is made of antibacterial fibers. Incidentally, an example of the analysis results of dust inside vacuum cleaners in ordinary households in Japan is as follows. In other words, there is a report that it consists of 51% earth and sand, 21% cotton dust, and 28% other (metal powder, hair, food debris) (Nihon Keizai Shimbun June 27, 1950). An example of the dust obtained is 40.5% organic matter, 53.0% ash (inorganic matter),
There is a report that fat content is 3.7% and water content is 2.8% (AS
Weatherburn, C.H. Bayler, Textile Research
Journal, 27, 199 [1957]) As is well known,
Approximately ¹⁰ to ¹⁰ microorganisms such as bacteria, yeasts, molds, and actinomycetes live in soil per ¹ cm3, and as soon as they encounter temperature and a nutrient source, they begin to multiply, and it only takes a few hours. The initial bacterial count is 100~
It can easily multiply by 1000 times. When considered in this sense, the dust collection chamber inside a vacuum cleaner must be considered to have very suitable conditions for proliferation. In other words, microorganisms such as bacteria in soil and sand brought in from outdoors already exist, food layers scattered on tatami mats and floor coverings indoors, sweat, sebum, and grime secreted from the human body, as well as insects. This is a warm environment based on the heat generated by the vacuum cleaner itself, in addition to food sources such as carcasses. It can be considered that conditions other than moisture, which are relatively difficult to provide, are always maintained in the dust collection chamber. Furthermore, although the content is slightly different from the example of a vacuum cleaner, it has been frequently pointed out in recent years that the air filter of an air conditioner is a suitable survival environment for microorganisms. For example, according to ``The Story of Microorganisms'' (Mayumi Inoue, Agne Co., Ltd., p. 94), molds rather than bacteria breed actively in air filters, such as Alternaria, Cladosporium, and
It is said that Trichoderma bacteria, Aureobasidium bacteria, Pestalotia bacteria, etc. are mainly detected.
On the other hand, in terms of functionality, the dust collection bag or dust collection filter of a vacuum cleaner has a more precise structure than the filter of an air conditioner, and is capable of capturing not only fine particles of dirt and dust, but also bacteria and mold spores. It has the ability to collect information. The inventors of this invention have long been interested in the foul odor and microbial contamination of the exhaust air emitted by vacuum cleaners, and as a result of considering ways to remove this problem, they found that the cause of the foul odor was accumulated in the dust collection bag. Almost all microorganisms are not found in the dust itself, but are separated from the dust by the airflow that passes through the dust, are collected on the fibers of the dust collection bag, and are deposited in a layer. I found out. Based on these facts, the inventors of the present invention suppressed the growth of microorganisms on the dust collection bag by changing the material of the filter medium of the dust collection bag to a fiber with antibacterial properties instead of ordinary fiber. possible, and even prevent bad odors,
Furthermore, the present invention was finally completed after discovering that it is possible to prevent the microorganisms that have passed through the filter medium from scattering and contaminating the indoor air. That is, the present invention provides a dust collection bag for a vacuum cleaner in which at least 20% by weight of the filter medium constituting the bag-like body is made of antibacterial fibers. Means for Solving the Problems The filter medium used in the present invention may be composed of nonwoven fabric or paper alone, or the two may be glued or stacked together in close contact with each other. . For example, a nonwoven fabric may capture coarser dust particles, followed by a paper layer that captures finer dust particles. In short, it is sufficient if at least 20% by weight, preferably at least 50% by weight of all the fibers in the nonwoven fabric or paper constituting the filter medium have antibacterial properties. Furthermore, in the case where nonwoven fabric and paper are layered, antibacterial fibers may be used in either one of them, for example, only in the nonwoven fabric, only in the paper, or in both. . Furthermore, the usage of antibacterial fibers for non-woven fabrics and paper is not limited to uniform use, such as uniform blending.
Antibacterial fibers may be used only in some of the layers in a stack of multiple layers. As the fibers having antibacterial properties used in the present invention, synthetic fibers such as acrylic fibers, polyester fibers, polyamide fibers, rayon, and polypropylene fibers can be used. Furthermore, as a method for imparting antibacterial properties, antibacterial fibers can be obtained by incorporating an antibacterial agent into the synthetic fibers at the stage of spinning the fibers. Antibacterial agents used in this invention include 2, 4,
4'-trichloro-2'-hydroxydiphenyl ether, 3-(trimethoxysilyl)propyldimethyloctadecyl ammonium chloride,
2-(4-thiazolyl)-benzimidazole, 3
-Methyl-4-isopropylphenol, 2-isopropyl-5-methylphenol, among which 2,4,4'-trichloro-
2'-hydroxydiphenyl ether is preferred. However, it is not necessarily limited to this. Embodiment An embodiment of the present invention will be specifically described below. In addition, (%) in the examples is "weight %"
means. FIG. 1 is an overall perspective view, partially cut away, of a dust collection bag for a vacuum cleaner according to the present invention. Reference numeral 1 denotes a dust collecting bag body for a vacuum cleaner, which includes a bag body 2 formed with a filter medium 3 that is dense and has sufficient ventilation and flexibility to collect dust, and into which airflow from an electric blower flows. In order to support the inlet, the inlet opening 4 has a support part 5 made of cardboard. FIG. 2 is an enlarged cross-sectional view of a main part of the filter medium 3 used in the bag body 2, and FIG. 2a shows an example in which two different layers are attached, 6 being an outer layer and 7 being an inner layer. FIG. 2b shows an example in which two different types of fibers are uniformly mixed and integrated; 8a is an antibacterial fiber and 8b is a non-antibacterial fiber. First, in this invention, 2,
Antibacterial acrylic fiber treated with 4,4'-trichloro-2'-hydroxydiphenyl ether (trademark "Ribfresh" A, Kanebo Co., Ltd.), 3 denier 60%
and heat-fusible conjugate fibers of polypropylene and polyethylene, 2 denier, 40%, were uniformly mixed with a card and made into a wet cloth, with a basis weight of 25 g/m <sup>2</sup>
A nonwoven fabric was manufactured. On the other hand, Western paper manufactured using the normal mixed papermaking method (basis weight
After uniformly applying a vinyl adhesive (35 g/m <sup>2</sup> ), the nonwoven fabrics were overlapped and pressed together to form the filter medium 3 of the dust collection bag main body 1 of the present invention. This filter medium 3
A bag body 2 was formed using the dust collection bag body 1, and a supporting part 5 was attached to the air inlet opening 4 using cardboard to produce a dust collection bag body 1, which was attached to a vacuum cleaner. Furthermore, as a comparative product, a regular dust collection bag made of nonwoven fabric and paper made only of regular type acrylic fibers that do not have antibacterial properties was similarly attached to another vacuum cleaner of the same type. On the other hand, using another vacuum cleaner, they collected a large amount of actual dust, mixed it uniformly, and created a dust sample for use in experiments. Using this sample dust, 1 g of sample dust was sucked into the experimental vacuum cleaner and comparison vacuum cleaner prepared earlier for 30 consecutive days, and after 30 days, the exhausted air was captured. The odor concentration in the air and the number of general bacteria contained were measured. Odor concentration was determined by the three-point comparison odor bag method in accordance with Tokyo Governor's Notice No. 238 (Notice 52, 3, 30) ``Measurement method of offensive odors based on the provisions of the Tokyo Metropolitan Pollution Control Ordinance''. Regarding the bacteria and fungi contained in the vacuum cleaner, the bacteria and fungi in the exhaust air were adsorbed and collected by attaching a membrane filter to the exhaust hole of the vacuum cleaner and allowing the exhaust air to pass through it for 3 minutes. Thereafter, the filter was placed in 100 ml of broth and shaken to shake out the bacteria into the broth, followed by dilution. A small amount of this diluted solution is smeared on a plate of ordinary agar for general bacteria and a plate of potato dextrose agar for fungi.
Cultivate at 35-37℃ for 18 hours, and for fungi at 20-30℃ for 4 days, count the grown colonies and determine the membrane.
The number of bacteria per 1 cm ² of the filter was calculated. Above 3
The results of the various tests are shown in Table 1.

【table】

[Table] Effects of the invention The present invention has the above-mentioned structure, and prevents indoor contamination caused by microorganisms in dust, which was conventionally found in disposable dust collection bags for vacuum cleaners, and prevents the growth of microorganisms in dust. In order to prevent unpleasant odors that occur as a result of vacuum cleaners, the odors in the air emitted from vacuum cleaners are significantly reduced, making it possible to maintain a comfortable indoor environment including homes.
The effect is remarkable.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway overall perspective view of the dust collection bag for a vacuum cleaner of the present invention, Fig. 2 is an enlarged sectional view of the main part of the filter medium, and Fig. 2a is an example in which two different layers are attached. FIG. 2b shows an example in which two different types of fibers are uniformly mixed and integrated. DESCRIPTION OF SYMBOLS 1... Dust collection bag main body, 3... Filter medium, 4... Opening part, 5... Support part, 8a... Antibacterial fiber, 8b...
…Non-antibacterial fibers.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A bag-like body formed with a dense filter material having sufficient air permeability and flexibility in order to filter airflow generated by an electric blower and collect dust. , and a supporting part made of cardboard or the like to support the opening of the bag to the inlet where the airflow flows, in which at least 20% by weight of the filter material constituting the bag-like body contains an antibacterial agent. A dust collection bag for a vacuum cleaner, characterized in that it is made of antibacterial fiber containing. 2. The dust collection bag for a vacuum cleaner according to claim 1, in which the filter medium is made of only a single layer of paper and/or nonwoven fabric. 3. The dust collection bag for a vacuum cleaner according to claim 1, wherein the filter medium is made of at least two laminated layers of paper and/or nonwoven fabric. 4. The dust collection bag for a vacuum cleaner according to claim 1, wherein antibacterial fibers are used for the paper and/or nonwoven fabric constituting the filter medium. 5. The dust collection bag for a vacuum cleaner according to claim 1, wherein the antibacterial fiber is an acrylic fiber. 6 Antibacterial agents contained in antibacterial fibers are 2, 4,
The dust collection bag for a vacuum cleaner according to claim 1, which is 4'-trichloro-2'-hydroxydiphenyl ether.