KR950000941B1 - Anti-fungi composition for washer - Google Patents

Abstract

The polypropylene resin (20) for an agitation wing and washing tank is compounded with 10 wt.% of tark (17), 0.1-1 wt.% of BaSO3 or K2CO3 powder as an inorganic antibiotic agent (18) and 0.5-2 wt.% of 10,10'-oxybis-phenosine as an organic antibiotic agent (19). When compounded, the content ratio of inorganic and organic antibiotic agents is 1-10:5-20. The agitation wing and washing tank is made by an injection molding of the compound.

Description

Antibacterial resin of washing machine

1 is a longitudinal sectional view of the automatic washing machine to which the present invention is applied.

Figure 2 is a perspective view of a part of the laundry and drip tray according to the present invention.

3 is a partial detailed view for explaining an embodiment of the antimicrobial resin material according to the present invention.

* Explanation of symbols for main parts of the drawings

8: washing container 8a: horizontal rib

8b: longitudinal rib 14: stirring blade

17: Tark 18: inorganic antibacterial agent

19: organic type antimicrobial agent 20: polypropylene resin

21: laundry 22: washing water

23: microorganism

The present invention relates to an antimicrobial resin of a washing machine, and in particular, to inhibit the growth of microorganisms such as bacteria, mold, yeast, etc. on the surface of the constituent member of the washing machine, and to prevent material deterioration and discoloration of the constituent member, and to wash the laundry by the microorganism. The present invention relates to an antimicrobial resin of a washing machine which is formed by mixing an inorganic antimicrobial agent and an organic antimicrobial agent as an antimicrobial substance to prevent contamination.

BACKGROUND ART Conventionally, a thermoplastic resin mainly made of polypropylene is used for a washing container, a stirring blade, or the like, in which a detergent liquid of a washing machine comes into contact.

And when the washing machine is used for a long time, it is common to see that the washing container and the stirring blade are discolored to a dark color such as a dark brown color of the detergent solution (contaminated water of the laundry, especially in homes using groundwater). More pronounced.

These causes include fungi such as Cladosporium, Alternaria, Mucor, Penicillum, Aspergillus, Actinomycetes, bacteria such as Escherichia coli, Bacillus, Pseudomonas, and yeasts of Rhodotorula. It has been found in the literature and on the basic investigation experiments of the washing tank isolated bacteria that it is because it breeds with various organic sources such as dust and dirt in the liquid (washing water) as nutrient sources. In addition, the internal environment of the washing machine with a relatively high humidity also causes microorganisms to multiply easily.

Known antimicrobial washing machines are made of synthetic resin to form a drip tray, laundry tub, or agitator blades, and then blend with an organic antimicrobial substance, [2- (4-thiazolyl) -benzimidazole], to breed microorganisms such as mold, yeast, and bacteria. There is something to suppress.

According to the detailed comparative experiments of the present inventors, the organic antimicrobial substance [2- (4-thiazolyl) -benzimidazole] has an effect of selectively inhibiting the growth of only fungi, and in particular, was unable to inhibit the growth of other bacteria and yeasts. In particular, black or brown dark color of the constituent elements of the washing machine is used in bacteria and yeasts, in addition to metal salts attached to surfactant components in organic, inorganic, synthetic detergents or soap components such as fats and proteins removed from clothes and dust. When the viscous substance to secrete, it appears that dust adheres and cannot be removed by the conventional antimicrobial washing machine.

In addition, in the washing rinsing process, there is a disadvantageous defect that results in the removal of the adherents or contaminants containing bacteria and yeasts in the rinse water, resulting in recontamination of the laundry. In addition, such bacteria or yeasts may be a cause of various skin diseases, and fungi may raise hygiene and cleanliness problems such as respiratory diseases, allergic diseases, and discoloration of fibers.

Therefore, the compound antibacterial agent with excellent heat resistance and antimicrobial ability to suppress the growth of not only molds, but also bacteria and yeast, high stability to human body and clothes without changing physical properties of washing machine and low concentration of antimicrobial effect by adding low concentration It is required.

In addition, synthetic resin materials such as polypropylene (PP: polyprophylen) resin have to increase the heating temperature to lower the viscosity of the resin to improve the fluidity in injection molding in order to maintain the dimensions and shapes of complicated molded products well. There is a need for a composition that can be met.

In addition, the conventional antimicrobial agent has different antimicrobial effects in the characteristics of microorganisms and environment, etc., and must be added at high concentration to increase the antimicrobial activity. There was a problem that causes discoloration of the member.

An object of the present invention was devised in view of the above-mentioned problems and demands, and the use of an inorganic antimicrobial agent and an organic antimicrobial agent having an optimal antimicrobial function in a polypropylene resin to provide specific effects only to specific bacteria, molds, and yeast, It is an object to prevent mold, bacteria, yeast, etc. from breeding on the surface of ribs of complex shapes such as washing tanks, stirring blades, and drip trays.

It is another object of the present invention to maintain the physical properties of the resin during molding of the component by forming a composite member to achieve the desired antimicrobial effect even if compounded in low concentration in the polypropylene resin compounded to maximize the advantages of the organic and inorganic antimicrobial agent To improve, to prevent discoloration of the components, to eliminate the increase in price, to maintain a long-term antibacterial function.

Hereinafter, the antimicrobial resin of the washing machine according to the present invention will be described in detail according to the accompanying drawings.

1 is a longitudinal cross-sectional view of a washing machine manufactured using the antimicrobial resin of the present invention, and FIG. 2 is a partial external perspective view of a laundry tub and a drip tray formed of the antimicrobial resin material according to the present invention, and FIG. It is a partial detailed view for demonstrating the Example of antibacterial resin.

In the drawing, 1 is a controller, 2 is a washing machine body, and a drip tray 4 is suspended by a supporting rod 3 inside the washing machine body 2, and a dehydration hole 9 is formed in the drip tray 4. The eggplant laundry tub 8 is provided, and the stirring blade 14 is provided in the inside of the laundry tub 8. The bottom of the sump container 4 is provided with a clutch 12 for transmitting power to the motor 13 and the washing barrel 8 and the stirring blade 14 is a shaft protruding upward of the clutch 12 ( It is configured to rotate selectively coupled to 10).

As shown in Figs. 2 and 3, the drip tray 4 and the washing tub 8 are formed so that the horizontal ribs 8a and the vertical ribs 8b intersect the outer side of the main wall. Radial ribs 8c and annular ribs 8d are formed at the bottom.

As shown in FIG. 3, the drip tray 4, the washing tub 8, and the stirring vane 14 are made of polypropylene resin 20, the main raw material of which is a synthetic resin, for example, a thermoplastic resin, and the polypropylene resin 20 ) Is injection molded by combining the antimicrobial agent 19 and the inorganic antimicrobial agent 18 in an organic phase.

In the antibacterial resin of the washing machine according to the present invention, 10% by weight of tar 17 is added to the polypropylene resin 20, and as the inorganic antibacterial agent 18 for improving the weight and strength, barium sulfate, potassium carbonate, mica, etc. Powdery inorganic materials and inorganic antimicrobial zeolite (zeolites such as Ag, Cu, Zn, etc.) of 0.1% by weight to 5% by weight are blended, thereby having the effect of inhibiting the growth of bacteria and yeast.

In addition, 10,10'-Oxybis-phenosine (Oxybis-phenosine) is blended into the polypropylene resin (20) at 0.5% by weight to 2% by weight as the organic antimicrobial agent (19) and together with the two antimicrobial substances antioxidant and Additives, such as a dispersing agent, and coloring agents, such as a pigment, can be combined and used.

The optimum content ratio of the inorganic antimicrobial agent 18 and the organic antimicrobial agent 19 blended into the polypropylene resin 20 for forming the drip tray 4, the washing tub 8, and the stirring blade 14 is 1 to 10: 5 A master batch is prepared at the optimum value of the composite antimicrobial agent as ˜20, and the master batch and the polypropylene resin 20 are mixed to prepare the drip tray 4, the washing tub 8, and the stirring vane 14. Injection molding.

By doing so, it is an antimicrobial substance that suppresses the growth of microorganisms such as mold, yeast, and bacteria in the area where the detergent liquid 22 adheres in the washing machine constituent member, and the washing machine itself can be used without special mechanical self-cleaning function. Preventing discoloration of paper, preventing odor due to propagation of microorganisms 23 and solving problems caused by contamination of laundry which is dispersed and recontaminated in water during rinsing of washing clothes 21 can maintain hygiene and cleanliness.

That is, the antimicrobial resin according to the present invention is attached to the microorganisms by the cationic action of the antimicrobial metal ions (Ag ⁺ , Zn ²⁺ , Cu ²⁺ ) contained in the inorganic antimicrobial agent 18 and the microscopic vaporization elution action of the organic antimicrobial agent 19. By killing (23), the synergistic effect of the antimicrobial effect can be obtained. The bacterial and yeast cell walls of the protein-peptide binding structure have an anion, and the cationic action, that is, the penetration pressure, acts strongly. It destroys cells and kills them naturally, and the micro-evaporation and dissolution of organic antimicrobial agents gives synergistic effect on the suppression of mold growth.

In FIGS. 1 to 3, reference numeral 5 denotes a spring, 6 a drain hose, 7 an outer cover frame, 11 a flange, 15 a balance, and 16 a laundry cover.

Hereinafter, the embodiment according to the present invention as described above with reference to the test results in more detail as follows. The resistance test for the polypropylene resin of the organic and inorganic composite antimicrobial agent according to the embodiment of the present invention is carried out by the dropping method and the shaking flask method by ASTM 21, JS Z 2911, KS A 0702 test.

In carrying out the present invention, the mold composition (minimum medium) is K ₂ HPO ₄ (0.7 g), KH ₂ PO ₄ (0.7 g), NH ₄ NO ₃ (1.0 g), MgSO ₄ NaCl (0.005 g) , F ₂ SO ₄ · 7H ₂ O (0.002 g), ZnSO ₄ · 7H ₂ P (0.002 g), MnSO ₄ · 7H ₂ O (0.001 g), agar (15 g), distilled water (1000 mL), PH (5.5 ) Was used.

As a mixed spore solution, K ₂ HPO ₄ (0.3 g), KH ₂ PO ₄ (0.7 g), NaNO ₃ (2.0 g), KCl (0.5 g), Saccharose (30 g), MaSO ₄ 7H ₂ O (0.5 g) ), FeSO ₄ .7H ₂ O (0.01 g), water (1000 mL), PH (6.5) were used.

As the bacterial medium, Beef extract (3g), Petono (5g), Lactos (5g), water (1000ml) and PH (6.5) were used. As a fungal test bacterium, four kinds of fungi, such as Penicilum Citrinum KCTC 1255, Cladosprium Cladosporiodes IFO 6348, Aspergillus niger KCTC 2119, and washing bath isolate, were used as mixed inoculation bacteria.

Washing bath test bacteria include Bacillus subtillis, Psendomona aeruginisa, and Echerichia coil.

As yeast, Rhodotoeula spp. And lactic acid bacteria were used as test bacteria.

Example 1

According to the method described above, the inorganic and organic antimicrobial agents were placed on at least one thousand medium medium, and the target specimen polypropylene resin (20 × 40 × t3mm) was placed on the test piece. The results of observing the growth level and growth low zone size of the specimen surface after incubation are shown in the following Table 1), it was found that the growth of the fungus was not confirmed at 0.5% to 2% by weight of the combined antimicrobial agent.

Table 1) shows the results of the resistance test of the mold against the antimicrobial compound of the inorganic antimicrobial agent (Ag, Cu, Zn-based zeolite) and the organic antimicrobial agent (10, 10'-oxybisphennosine) according to the present invention. It was evaluated after 14 days at room temperature of 27 °, and divided into five stages as follows.

[Table 1] Comparison of mold resistance test results according to antimicrobial composition

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Example 2

100 ml of bacterial liquid medium was added to a 250 ml Erlenmeyer flask according to the method described above, and 5 strains of the test strain were initially inoculated at 1.0 × 10 ⁴ / ml for 1 hour on a shaking water bath. The sample was diluted 10-fold and smeared onto the medium to calculate the number of bacteria, and the results are shown in Table 2). The result of the reduction of the bacteria was good at 99.8% or more at 0.5% to 2% by weight of the combined antimicrobial agent. It was confirmed that the synergistic effect of the antimicrobial can be obtained by complex antimicrobial preparation to microorganisms such as fungi and bacterial yeast.

[Table 2] Comparison table of measurement test results of bacteria according to antimicrobial composition

As described above, according to the present invention, an organic and inorganic composite antimicrobial agent is blended into a constituent member of a washing machine, and injection molding is performed to remove contamination or to suppress microbial propagation by the action of the antimicrobial agent without laying a machine. In addition to preventing discoloration and deterioration of materials, microorganisms are dispersed in the rinsing water during washing and rinsing, which eliminates the problems caused by contamination of the laundry, ie, skin diseases and allergic diseases, and cleans clothing. It is possible to impart the bioavailability, and to improve the product yield without affecting the physical properties of the composite antimicrobial agent in the injection molding of the component to the resin.

Claims (4)

In synthetic resins such as laundry tubs, drip trays, and stirring blades in which washing water is in contact, polypropylene resins, 10% by weight of tar, powdery inorganic materials such as barium, potassium carbonate, mica, Ag, Cu, Zn An antimicrobial resin of a washing machine comprising an inorganic antimicrobial agent incorporating zeolites such as these, and an organic antimicrobial agent such as 10, 10'-oxybisphennosine. The antimicrobial resin of a washing machine according to claim 1, wherein zeolites such as Ag, Cu, and Zn, which are inorganic antimicrobial agents, are added in an amount of 0.1 wt% to 1 wt% based on the polypropylene resin. The antimicrobial resin of a washing machine according to claim 1, wherein the organic antimicrobial agent 10, 10'-oxybisphennosine is added in an amount of 0.5 wt% to 2 wt% based on the polypropylene resin. The antimicrobial resin of the washing machine according to claim 2 or 3, wherein the content ratio of the inorganic antimicrobial agent and the organic antimicrobial agent is 1 to 10: 5 to 20.