KR20040097935A - Anti-microbial plastic composition and drum washing machine comprising the pedestal menufactured by using the same - Google Patents

Abstract

PURPOSE: An antibacterial plastic composition and a drum washing machine containing an installing stand prepared by using the composition are provided, to prevent the generation of bacteria and fungi at the installing stand. CONSTITUTION: The antibacterial plastic composition comprises 99.0-99.7 wt% of polypropylene; and 0.3-1.0 wt% of an antibacterial master batch which comprises 89 wt% of propylene, 5 wt% of an isothiazolin-based compound, 5 wt% of an inorganic composite compound and 1 wt% of a silver compound. Preferably the isothiazolin-based compound comprises the 4,5-dichloro-2-n-octyl-4-isothiazoli-3-none represented by the formula 1 and the 2-N-octyl-4-isothiazoli-3-none represented by the formula 2 in the ratio of 4:1; and the inorganic composite compound is zinc oxide.

Description

A drum washing machine comprising an antimicrobial plastic composition and a mounting table manufactured using the same, the present invention relates to a drum washing machine comprising an antimicrobial plastic composition and a mounting table manufactured using the same.

The present invention relates to a drum washing machine comprising an antimicrobial plastic composition and a mounting rod manufactured using the same, and more particularly, to a bad smell by preventing the habitat of various bacteria and fungi inhabiting the plastic surface of the mounting rod for the drum washing machine. The present invention relates to an antibacterial plastic mounting stand for a drum washing machine that can prevent discoloration and other harmful cancers.

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.

Since the drum washing machine has a door for pulling in and out of the laundry, the position of the door is low, and the upper body must be lowered a lot when the laundry is put in and the laundry is taken out. To install it.

In addition, even when the drum washing machine is installed on the uneven surface, it is installed by using a mounting table with a horizontal adjustment device.

1 is a perspective view showing the appearance of a drum washing machine with a mounting table according to the prior art.

As shown in FIG. 1, the lower part of the drum washing machine 1 is provided with a mounting table 2 that raises the height while supporting the drum washing machine 1. At this time, the mounting table 2 is provided with a front horizontal adjustment leg (2a) and a rear horizontal adjustment leg (2b) in the front and rear, respectively, so as to adjust the horizontal of the drum washing machine (1).

However, there is a problem that the internal space of the mounting table 2 of the drum washing machine 1 as described above is not used without leaving the empty space, resulting in a lot of waste of space.

In addition, since there is no storage space for detergent required for washing, the detergent is placed separately around the drum washing machine 1 so that the surrounding space becomes narrower. There was a problem that can drop the detergent due to carelessness to contaminate the surroundings.

In addition, when there is no storage space of the parts when replacing the parts of the drum washing machine (1) there is a hassle that the user must move to find the parts one by one.

In addition, when the mount is made of plastic, in general, it is easy to think that plastic is a material that is hard to be contaminated with germs, but in practice, 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. The treatment methods include a kneading method in which chemicals are added during molding and a post-treatment method for surface treatment after molding, but in the case of plastics, kneading is the most common method.

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 of the washing machine, 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 very low practical concentrations of drugs and the originals are fixed to plastics, it is thought that plastic products with added antibacterial and fungal agents are unlikely to cause an accident.

The present invention is to solve the above problems, an object of the present invention is to provide a drum washing machine that can accommodate detergent and washing machine parts by having a storage compartment of a drawer structure on the mounting table of the drum washing machine. In addition, an object of the present invention is to provide an antimicrobial plastic composition that can prevent the parasitic bacteria and mold on the mount.

1 is a perspective view showing the appearance of a drum washing machine with a mounting table according to the prior art.

2 is a perspective view showing the appearance of a drum washing machine provided with a mounting table according to the present invention.

Figure 3 is a photograph showing the results of testing the antimicrobial properties of the antimicrobial plastic composition according to the invention according to the Halo Test.

Figure 4 is a photograph showing the results of testing the antimicrobial properties of the antimicrobial plastic composition according to the present invention dropping method.

Explanation of symbols on the main parts of the drawings

1: Drum washing machine 2,2 ': Mounting stand

2a: front leveling leg 2b: rear leveling leg

100: storage room (1) 100 ': storage room (2)

In order to achieve the above object, the drum washing machine according to the present invention is characterized in that it comprises a storage compartment partitioned in the drawer structure in the mounting stand of the drum washing machine for ensuring the height and leveling the washing machine.

In addition, in order to achieve the above another object, the antimicrobial plastic composition according to the present invention comprises 99.0-99.7% by weight of polypropylene and 0.3-1.0% by weight of antibacterial masterbatch, wherein the antimicrobial masterbatch is 89 It is characterized in that it comprises a polypropylene by weight, 5% by weight isothiazoline-based compound, 5% by weight inorganic composite compound and 1% by weight silver compound.

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

Figure 2 is a perspective view showing the appearance of a drum washing machine having a storage compartment partitioned with a drawer structure on the mounting table according to the invention. As shown in FIG. 2, the present invention includes a drum washing machine 1, a mounting stand 2 'for securing the height of the drum washing machine 1, and a horizontal adjustment, and a drawer provided at the mounting stand 2'. It consists of the storage chambers 100 and 100 'partitioned by the structure.

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.

For example, in the previous embodiment, the mounting table is divided into two storage chambers, but as the size of the mounting stage is changed, two or more storage chambers may be provided to properly classify the storage items according to types.

In addition, in the present invention, in order to prevent the occurrence of bacteria and mold on the mounting stand when the washing machine is used, the mounting stand includes 99.0-99.7 wt% polypropylene and 0.3-1.0 wt% antibacterial masterbatch. It is prepared from the composition according to a conventional method. 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 89% by weight of polypropylene, 5% by weight of isothiazoline-based compound, 5% by weight of inorganic composite compound and 1% by weight of silver 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 (OIT), it is preferable that the ratio of General formula 1: 2 is 4: 1. Other than this ratio, it is difficult to obtain the desired sterilization action in the environment in which the mounting table 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. In addition, silver compounds having excellent bactericidal and antibacterial effects are added. The silver compound used in the present invention can be used as any compound as long as it contains silver without particular limitation. Silver can also be used alone.

Example

Example 1

Antibacterial masterbatch by adsorbing 5% by weight of inorganic compound which is zinc oxide and 1% by weight of silver to 5% by weight of isothiazoline compound mixed with 89% by weight of polypropylene and DCOIT and OIT in a ratio of 4: 1 Was prepared.

The antimicrobial masterbatch obtained was mixed with 99.7 wt% of MT42 in an amount of 0.3 wt% to prepare a mount for a drum washing machine in a conventional manner.

Example 2

A mounting table was 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

A mounting table was 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

A mounting table was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with 99.4% by weight MT42 in an amount of 0.6% by weight.

Example 5

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

Example 6

A mounting table was 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

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

Example 8

A mounting table was 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

The mount was prepared using a 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

Except for using Ag and Zn instead of zinc oxide was prepared in the same manner as in Example 1.

In order to test the antimicrobial properties of the mounting rod according to the present invention, the antimicrobial activity of the mixture immediately before molding of the mounting rod obtained in Examples and Comparative Examples was examined.

Halo Test and Shake Flask test were performed on bacteria and Halo Test and sample dropping methods on fungi.

Halo Test: S. aureus and Escherichia coli (E. coli) was plated on the NA medium 3 × 10 ⁶ / plate, respectively, and then immediately before molding the mounting stage prepared in Examples 1 to 8 and Comparative Examples 1 and 2 The mixture was placed on a medium with a size of 2.5 × 2.5 cm and incubated at 37 ° C. for 24 hours. The mold was also plated on a PDA plate so that the mold (A.niger) 200μl, and the sample was placed on the medium in a size of 2.5 × 2.5cm, and incubated at 25 ℃ 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 in a 10 ml Erlenmeyer flask in LB liquid medium, and 10 mixture samples of the above-mentioned Examples and Comparative Examples were added to each size of 1 × 1 cm, and then, 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.

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

Since the above antimicrobial test results were almost the same, it is most economical to use the antibacterial masterbatch in an amount of 0.3% by weight in the present invention.

As described above, the present invention is provided with a drawer structure formed in the drum washing machine mounting rack, it is possible to store the detergents and various items required for washing, there is an effect of increasing the space utilization and provide convenience to the user.

In addition, by manufacturing the mounting of the drum washing machine with the antimicrobial plastic composition according to the present invention can prevent the parasitic of bacteria and mold that may occur in the mounting when using the washing machine to prevent infectious diseases and discoloration of the appearance.

Claims (6)

99.0-99.7 wt% polypropylene and 0.3-1.0 wt% antibacterial masterbatch, wherein the antibacterial masterbatch is 89 wt% polypropylene, 5 wt% isothiazoline based compound, 5 wt% An antimicrobial plastic composition comprising an inorganic composite compound and 1% by weight silver compound. The method of claim 1, The isothiazoline-based compound may be represented by 4,5-dichloro-2-n-octyl-4-isothiazol-3-non of formula 1 and 2-N-octyl-4-isothiazol-3- of formula 2 An antimicrobial plastic composition comprising rice fields at a ratio of 4: 1. Formula 1 Formula 2 The method of claim 1, The inorganic composite compound is zinc oxide, characterized in that the antimicrobial plastic composition. The method of claim 2, The inorganic composite compound is zinc oxide, characterized in that the antimicrobial plastic composition. Drum washing machine comprising a mount made of an antimicrobial plastic composition according to any one of claims 1 to 4. The method of claim 5, wherein The drum washing machine further comprises a storage compartment partitioned by the drawer structure.