KR20050022510A - Drum washer comprising anti-microbial plastic composition - Google Patents

Abstract

PURPOSE: Provided is a drum washer made of anti-microbial plastic composition material for protecting generation of bad-odor, discoloration of appearance or contamination of laundry by inhibiting inhabitation of bacteria and fungi on surface of parts of the washer. CONSTITUTION: The washer comprises tub, detergent container, drain hose and lift. The parts comprise 99.0-99.7wt.% of polypropylene and 0.3-1.0wt.% of anti-microbial master-batch. The master batch is anti-microbial plastic composition comprising 90wt.% of polypropylene and 5wt.% of isothiazolin-based compound, and 5wt.% of inorganic complicated compound. The isothiazolin base compound comprises 4,5-dichloro-2-n-octyl-4-isothiazoli-3-none of formula(1) and 2-N-octyl-4-isothiazolin-3-none of formula(2) in 4:1 ratio.

Description

Drum washing machine containing an antimicrobial plastic composition {DRUM WASHER COMPRISING ANTI-MICROBIAL PLASTIC COMPOSITION}

The present invention relates to a washing machine, and more particularly, to an antimicrobial plastic composition capable of preventing the formation of various bacteria and molds parasitic on the surface of a washing machine component, thereby preventing the occurrence of odor, discoloration of appearance, and contamination of laundry. It relates to a drum washing machine employing a component to be.

In general, a drum washing machine is a washing machine having an advantage of less damage due to twisting of the laundry in the same effect as tapping the laundry with a laundry bat by tapping the laundry using a drop generated by the rotation of the rotating tub provided in a drum shape.

In addition, the drum washing machine is automatically washed, rinsed, dehydrated according to the input program.

In general, the drum washing method is a method of washing the laundry using the friction force of the rotating drum and the laundry by receiving the driving force of the motor in a state in which detergent, washing water and laundry are put in the drum, there is almost no damage to the laundry, Not tangled, knocking and rubbing can have a laundry effect.

1 is a perspective view showing the appearance of a drum washing machine having a mounting table according to the prior art, Figure 2 is a cross-sectional view schematically showing the configuration of the drum washing machine, briefly described with respect to the structure of the drum washing machine with reference to the drawings. .

2 is a longitudinal cross-sectional view showing the configuration of the drum washing machine, the tub 101 is installed inside the cabinet 100, the drum 102 is rotatably installed in the inner center of the tub 101.

In addition, a motor 103 is installed at a lower side of the tub 101, and a motor pulley 104 is axially connected to the motor 103.

On the other hand, the drum shaft 111 is installed behind the drum 102, the drum shaft 111 is provided with a drum pulley 105.

In addition, the drum pulley 105 installed on the drum shaft 111 and the motor pulley 104 connected to the motor 103 are connected by a belt 106 which is a power transmission element.

A door 107 is installed in front of the cabinet 100, and a gasket 108 is installed between the door 107 and the tub 101.

A hanging spring 109 supporting the tub 101 is installed between the inside of the upper surface of the cabinet 100 and the upper side of the outer circumferential surface of the tub 101, and the inner side of the lower surface of the cabinet 100 and the lower side of the outer peripheral surface of the tub 101 are installed. Between the friction damper 110 is provided for damping the vibration of the tub 101 generated during dehydration.

In general, when the component is made of plastic, plastic is generally considered to be a material that is hard to be contaminated with germs, but it is often found that germs or mold are generated in household products made of plastic around.

Plastics have different resistance to germs, but when contaminants are attached to plastics, they grow as nutrients and even plastics deteriorate.

The purpose of the antibacterial fungus treatment is to make plastic products that do not generate bacteria on the surface.

Treatment methods include kneading methods in which drugs are added during molding processing and post-treatment methods for surface processing after molding, but in the case of plastics, kneading methods occupy most of them.

When the washing machine is used, the mounting stand may mainly cause black mold, E. coli, and Staphylococcus aureus. In general, black mold is found in wet and wet places such as bathrooms, kitchens, and shoeboxes, which are also found in leather products and old books. This black mold is the culprit of allergies. Escherichia coli usually does not show pathogenicity in the intestine, but when it enters other parts of the intestine, it causes cystitis, pyelitis, peritonitis, sepsis, and even in the intestine, antigen-type E. coli such as O 26, O 55, O 111, etc. It is called Escherichia coli especially because it can cause infectious diarrhea from adult to adult. Staphylococcus aureus is a bacterium that is widely distributed in nature. It causes not only food poisoning but also purulent diseases such as purulent otitis media, otitis media and cystitis. It is the most common food poisoning in Korea after Salmonella food poisoning and enteritis vibrio food poisoning. There are dozens of staphylococci, but only Staphylococcus aureus, which produces a yellow pigment, causes food poisoning, and there have been no cases of food poisoning caused by Staphylococcus aureus.

If mold grows on the surface, it first gives the user a messy look. This causes aesthetic damage, odor, discoloration, etc., which greatly reduces the value of the product. Decomposing enzymes metabolized by bacteria are often involved in the generation of odors, and indirectly, antibacterial treatment is performed for the purpose of deodorization.

Antibacterial and fungicides inhibit the activity of bacteria and fungi, so they have biological effects inherently. Great action is toxic and must be used with care. Since most of the antibacterial and fungicides currently used have a very low practical concentration of the drug and the substance is fixed to the plastic, it is considered that the plastic products to which the antibacterial and fungal agent is actually added are unlikely to cause an accident.

Meanwhile, in the case of the conventional drum washing machine, each component is mainly made of plastic or stainless steel. In the case of the plastic component, the inner and outer tanks are buried in detergent or clothes as they are washed. Bacteria, such as bacterial bacteria, adhere to and propagate due to nutrients or contaminants, and there is a problem in the cleanliness of laundry due to contamination inside the washing machine.

In addition, even if not directly related to the laundry is adopted inside the drum washing machine, there is a problem that the mold or other bacteria inhabit other components by the washing water splashing during washing, there was a problem in washing hygiene.

The present invention is to solve the above problems, by adopting a component made of an antimicrobial plastic composition to prevent the formation of various bacteria and fungi parasitic on the surface of the components, while the occurrence of odor, discoloration of appearance, laundry It aims to be able to prevent contamination.

In order to achieve the above object, the present invention is a drum washing machine comprising a tub, a detergent container, a drain hose, a lift, etc., the component is 99.0-99.7% by weight of polypropylene and 0.3-1.0% by weight of antibacterial Including a masterbatch, the antimicrobial masterbatch provides a drum washing machine, characterized in that the antimicrobial plastic composition consisting of 90% by weight of polypropylene, 5% by weight of isothiazoline-based compound and 5% by weight of the inorganic composite compound.

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

In order to prevent the formation of bacteria and mold on the components when the washing machine is used, the mount is manufactured according to a conventional method from 99.0-99.7% by weight of polypropylene and 0.3-1.0% by weight of antibacterial masterbatch.

The polypropylene may be used without particular limitation as long as it is used in the art, and in particular, it is preferable to use one commercially available from LG Chem under the product name “MT42”.

The antimicrobial masterbatch is prepared according to a conventional method including 90% by weight of polypropylene, 5% by weight of isothiazoline-based compound and 5% by weight of inorganic composite compound.

The isothiazoline-based compound includes 4,5-dichloro-2-n-octyl-4-isothiazolin-3-non (DCOIT) represented by the following Chemical Formula 1 and 2-n-octyl-isothiazoli As a mixture of 3-non (QIT), it is preferable that the ratio of General formula 1: 2 is 4: 1.

Other than the above ratio, it is difficult to obtain a desired sterilization action in the environment in which the component according to the present invention is used.

This is because the DCOIT acts as a fast disinfectant, and the OIT acts as a sustained sterilization. In the present invention, zinc oxide is used as the inorganic composite compound.

Example

Example 1

An antimicrobial masterbatch was prepared by adsorbing 5% by weight of an inorganic compound, which is zinc oxide, on 5% by weight of an isothiazoline compound mixed with 90% by weight of polypropylene, DCOIT, and OIT in a ratio of 4: 1.

The resulting antimicrobial masterbatch was mixed with 99.7% by weight MT42 in an amount of 0.3% by weight to prepare a component.

Example 2

Component parts were prepared in the same manner as in Example 1, except that the antibacterial masterbatch was mixed with 99.6 wt% of MT42 in an amount of 0.4 wt%.

Example 3

Component parts were prepared in the same manner as in Example 1, except that the antibacterial masterbatch was mixed with 99.5% by weight MT42 in an amount of 0.5% by weight.

Example 4

Component parts were prepared in the same manner as in Example 1, except that the antibacterial masterbatch was mixed with 99.4 wt% MT42 in an amount of 0.6 wt%.

Example 5

Component parts were prepared in the same manner as in Example 1, except that the antibacterial masterbatch was mixed with 99.3 wt% MT42 in an amount of 0.7 wt%.

Example 6

Component parts were prepared in the same manner as in Example 1, except that the antibacterial masterbatch was mixed with 99.2% by weight MT42 in an amount of 0.8% by weight.

Example 7

The components were prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with 99.1 wt% of MT42 in an amount of 0.9 wt%.

Example 8

Components were prepared in the same manner as in Example 1, except that the antibacterial masterbatch was mixed with 99.0 wt% of MT42 in an amount of 1.0 wt%.

Comparative Example 1

Components were prepared using commercially available antimicrobial master batch Chemcide (10,10'-oxybisp henoxarsine (OBPA)) in an amount of 0.4% by weight.

The Chemcide consists of 95% by weight polypropylene and 5% by weight OBPA.

Comparative Example 2

A component was manufactured in the same manner as in Example 1, except that Ag and Zn were used instead of zinc oxide.

In order to test the antimicrobial properties of the components according to the present invention, the antimicrobial properties of the mixture immediately before molding the components obtained in Examples and Comparative Examples were examined.

Halo Test and Shake Flask were tested for bacteria and Halo Test and sample dropping methods for fungi.

Halo Test: S. aureus and E. coli were plated 3 × 10 ⁶ / plate in a NA batch, respectively, and immediately before molding of the mounting bases prepared in Examples 1 to 8 and Comparative Examples 1 and 2. The mixture was placed on a batch of size 2.5 × 2.5 cm and incubated at 37 ° C. for 24 hours.

For mold, mold (A.niger) was smeared on a PDA plate to 200 µl, and the sample was placed on a batch of 2.5 × 2.5 cm and incubated at 25 ° C. for 24 hours. The performance of the antimicrobial agent was determined by the generation of a clear zone around the sample.

Test results using the Halo test method are shown in Table 1 and FIG. 3.

Since the results of Examples 1-8 were the same, only the results of Example 1 and Comparative Examples 1 and 2 are shown in FIG. 3.

Escherichia coli Staphylococcus aureus mold Example 1 - One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 2 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 3 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 4 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 5 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 6 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 7 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 8 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Comparative Example 1 0 0 0 0.3 0.4 0.05 0.05 0.1 0.1 0.1 Comparative Example 2 0.05 0.1 0.1 0.2 0.2 -

"-" Means no effect, in cm.

As can be seen in Table 1 and FIG. 3, the Clear Zone of Example 1 was much wider than Comparative Examples 1 and 2.

 Shake Flask test: Staphylococcus and Escherichia coli were inoculated into a 10 ml Erlenmeyer flask in an LB liquid batch, and 10 mixture samples of the above-mentioned Examples and Comparative Examples were added in a size of 1 × 1 cm, respectively, followed by 24 at 37 ° C. Shaking cultures were performed for hours. Before adding the sample, take 100 μl, 10 μl, and 1 μl from the flask and spread them on an NB plate as a control. After incubation, 100 μl and 10 μl of the culture solution were taken, respectively, and plated on an NB plate to measure the number of bacteria. The results are shown in Table 2.

Fungus sample unit Initial bacterial count 24 hours later % Inhibition Staphylococcus aureus Example 1 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 2 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 3 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 4 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 5 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 6 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 7 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 8 CFU / mL 5.0 × 10 ⁵ <1 99.9 Comparative Example 1 CFU / mL 5.0 × 10 ⁵ 7.0 × 10 ⁸ 0 Comparative Example 2 CFU / mL 5.0 × 10 ⁵ 6.8 × 10 ⁸ 0 Escherichia coli Example 1 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 2 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 3 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 4 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 5 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 6 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 7 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 8 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Comparative Example 1 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 15.3 Comparative Example 2 CFU / mL 6.0 × 10 ⁵ 5.2 × 10 ⁸ 31.3

As can be seen from Table 2, the sample according to Example 1-8 showed 99.9% inhibition rate after reducing the number of Staphylococcus aureus bacteria to less than 1 after 24 hours.

Sample dropping method: A test method to check the antimicrobial effect on mold on the surface of the specimen, by dropping a drop of PDA on the specimen, inoculated with mold (A.niger) and incubated at 25 ℃ for 72 hours It is.

Example 1-8 and Comparative Examples 1 and 2 were tested by the sample dropping method, and the results were the same. Only the results of Example 1 and Comparative Examples 1 and 2 are shown in FIG. 4.

Since the antimicrobial test results are almost the same, it is most economical to use the antimicrobial masterbatch in the present invention from 0.3 to 0.3% by weight.

On the other hand, the present invention is not limited to the above-described embodiment, and various modifications and variations are possible without departing from the gist of the present invention.

As described above, the laundry may be infested with bacteria such as mites and bacteria, or the contaminants or nutrients from the laundry may contaminate the washing water or the washing water. By replacing the parts with antimicrobial plastic composition, it prevents mold and other bacteria from growing, and it is effective to maintain the cleanliness of the laundry as well as cleaning the inside of the washing tank.

So far, the present invention has been described with reference to its preferred embodiments, and those skilled in the art will be able to implement embodiments of the present invention that are modified within the essential technical scope of the present invention.

That is, the antibacterial plastic according to the embodiment of the present invention can be applied to all components of the plastic composition in contact with washing water or moisture as well as tubs, detergent containers, drain hoses and lifts mentioned in claims in the components of the washing machine. It is not limited to the kind of antibacterial substance that can be added to plastic.

As described in detail above, in the present invention, by replacing the components of the plastic material in contact with the laundry or moisture in the washing machine with an antimicrobial plastic composition, it is possible to prevent the formation of various bacteria and fungi parasitic on the surface of the components to generate odor It has the effect of preventing discoloration and contamination of laundry.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims Can understand.

1 is a perspective view showing the appearance of a drum washing machine.

2 is a cross-sectional view schematically showing the configuration of a drum washing machine.

Figure 3 is a photograph showing the results of testing Example 1 and Comparative Examples 1 and 2 according to the Halto Test.

Figure 4 is a photograph showing the results of testing Example 1 and Comparative Example 1-2 according to the sample dropping method.

Explanation of symbols on the main parts of the drawings

100. Cabinet 101. Tub

102.Drum 108.Gasket

Claims (4)

In a drum washing machine comprising a tub, a detergent container, a drain hose, a lift, etc., The component comprises 99.0-99.7 wt% polypropylene and 0.3-1.0 wt% antibacterial masterbatch, the antimicrobial masterbatch 90 wt% polypropylene and 5 wt% isothiazoline based compound and 5 wt% Drum washing machine, characterized in that the antimicrobial plastic composition consisting of inorganic compound of%. The method of claim 1, The isothiazoline-based compound includes 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one of formula 1 and 2-N-octyl-4-isothiazolin-3-one of formula 2 Drum washing machine, characterized in that the antimicrobial plastic composition consisting of 4: 1. Formula 1 Formula 2 The method of claim 1, Drum washing machine, characterized in that the inorganic compound compound is an antibacterial plastic composition made of zinc oxide. The method of claim 2, Drum washing machine, characterized in that the inorganic compound compound is an antibacterial plastic composition made of zinc oxide.