KR101937813B1 - Antimicrobial Case for Toothbrush or Interdental Brush - Google Patents

Abstract

The present invention relates to an antimicrobial case for a toothbrush or an interdental brush, and more specifically, to an antimicrobial case for a toothbrush or an interdental brush, as a case for protecting a toothbrush or an interdental brush, which exhibits elasticity and impact strength at the same time by mixing an antimicrobial material with a mixed resin composition comprising a polypropylene resin and an acrylate, and can hygienically carry the toothbrush or the interdental brush while effectively exhibiting own sterilizing and antibacterial performance.

Description

An antimicrobial case for toothbrush or interdental toothbrush (Antimicrobial Case for Toothbrush or Interdental Brush)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial case for a toothbrush or an interdental toothbrush. More particularly, the present invention relates to a case for protecting a toothbrush or an interdental toothbrush by mixing an antimicrobial material with a mixed resin composition comprising polypropylene resin and acrylate, And an antibacterial case for an interdental toothbrush capable of hygienically carrying a toothbrush or an interdental toothbrush while effectively exhibiting its own sterilization and antibacterial performance.

Generally, tooth brushing means for keeping the teeth clean is a general toothbrush which can evenly clean the teeth as a whole, and a toothbrush which is wiped with a toothbrush which is difficult to wipe with a toothbrush (hereinafter referred to as "teeth") Toothbrushes can be removed to remove foreign substances and tartar toothbrush is used separately.

Toothbrushes of the toothbrush or interdental toothbrush are easily infected with the harmful microorganisms such as germs and bacteria transferred from the oral cavity after use by the moisture and nutrients remaining in the bristles, and the toothbrush contaminated by the breeding microorganisms is continuously used It is easy to be exposed to various oral diseases such as periodontitis, so hygienic storage of toothbrush or interdental toothbrush is very important.

On the other hand, when the user goes to an office, which is a common use space for many people, and travels or travels, a toothbrush case or an interdental toothbrush case is provided for the purpose of carrying or storing toothbrush or interdental toothbrush separately.

A toothbrush case is disclosed in Korean Patent Laid-Open Publication No. 10-2017-0137021 (December 12, 2017), which is disclosed in the related art relating to the toothbrush case as described above, in which a sanitary toothbrush is stored, An upper case formed in a rectangular shape and protruding from a side surface at a predetermined height and having a fixing groove formed at a front center thereof; A lower case connected to one side of the upper case by a hinge so as to be rotatable and having a ventilation hole formed along a longitudinal direction thereof and having a toothbrush holder for fixing a neck of the toothbrush; An inclined portion formed at an upper surface corner of the upper case so as to be inclined downward; A fixing band formed on the inner side of the upper case and made of a material having an elastic force and adapted to fit any one of an interdental toothbrush, a portable mirror, a floss, and a portable toothpaste; A ventilation hole formed in the front and rear surfaces of the lower case to allow ventilation to be smoothly performed inside the toothbrush case; A plurality of drain holes formed along the longitudinal direction of the lower case; Wherein the toothbrush case is configured to be opened or closed by a fixing groove formed in the upper case and a fixing protrusion formed in the lower case, The toothbrush case is installed at both ends of the lower case and has an upper end protruding inward at a predetermined interval and downwardly inclined so that the toothbrush can be stably and hygienically stored.

In the interlabial toothbrush case of the prior art disclosed in Korean Patent Application No. 20-2017-0002881 (Aug. 14, 2017), which is disclosed in relation to the interdental toothbrush case, the interdental toothbrush is formed so as to be stored and carried, Wherein the interdental toothbrush case includes an upper case having a storage space for receiving an interdental toothbrush therein and an upper connecting member for folding the interdental toothbrush case to the outside; A lower case connected to the upper connecting member to form a lower connecting member so that the interdental toothbrush case is folded, and a storage space in which the interdental toothbrush is received is formed; A dividing member formed on the inner surface of the lower case so as to be independently housed in the interdental toothbrush received in the lower case; A sanitary mirror provided on an inner surface and an outer surface of a center portion of the lower case; And an opening / closing part formed on a front surface of the interdental toothbrush case so as to open and close the upper case and the lower case. The interdental toothbrush case is capable of hygienically storing the interdental toothbrush while keeping the tooth state clean. .

However, both of the above-described conventional arts simply store the toothbrush or interdental toothbrush in a storage state so that the toothbrush or the interdental toothbrush can be carried separately while being separated from other articles. Since the toothbrush or interdental toothbrush is kept in a closed state, It is difficult to prevent the propagation of harmful microorganisms, and thus there is a problem that the hygienic properties are remarkably deteriorated.

In particular, Korean Patent Laid-Open Publication No. 10-2017-0137021 described above can reduce the microbial fertility by drying the residual moisture in the bristles of the toothbrush or the interdental toothbrush by providing a vent hole on the case. However, There is a problem that it is difficult to expect removal efficiency.

Recently, a case of toothbrush or interdental toothbrush having a built-in ultraviolet lamp or diode for artificially discharging ultraviolet ray having strong disinfecting power, that is, a case of various sterilizing functions which can be sterilized and dried for sanitary storage of toothbrush or interdental toothbrush, Research and development.

However, in the case described above, since the disposing function of the case is installed in the case itself, the portability due to the weight increase is lowered, the product is damaged due to the external impact, the manufacture of the case product is complicated, There is a problem that the unit price is increased.

Korean Unexamined Patent Publication No. 10-2015-0138275 (Dec. 09, 2015) discloses a process for preparing a mixture of a) at least one zinc salt with at least one organic and / Or solubilized or dispersed in an aqueous solvent; b) adding the resulting dispersion or solution to a solution or dispersion of at least one monomer in an organic and / or aqueous solvent; c) polymerizing at least one monomer; A method for producing an antimicrobial polymer is known.

Korean Patent No. 10-1663480 (issued on September 30, 2016), an antimicrobial functional material including a shell powder having a high heat treatment at 830 ° C to 1200 ° C is added to a polymer resin and injection molded, Ca2O3 0.25wt% to 0.45wt% CaO (OH) 2 89wt% to 92wt%, CaCO3 4.6wt% to 6.6wt%, SiO2 0.5wt% to 5wt%, SO3 0.2-0.6wt%, CaO 0.2-0.6wt% , 0.24 wt% to 0.44 wt% of Fe2O3, 0.1 wt% to 0.3 wt% of SrO, 0.1 wt% to 0.3 wt% of P2O5, 0.05 wt% to 0.15 wt% of MgO and 0.05 wt% to 0.15 wt% of B2O3 Is known as an antibacterial container.

However, although the above-mentioned patents show antimicrobial properties by mixing an antimicrobial material with a polymer resin, there is a problem in that the elasticity and the impact strength of the polymer resin are insufficient at the same time since they do not consider the physical properties of the polymer itself at all.

Korean Patent Publication No. 10-2017-0137021 (December 12, 2017) Korea Public Practice 20-2017-0002881 (August 14, 2017) Korean Patent Publication No. 10-2015-0138275 (December 09, 2015) Korean Patent No. 10-1663480 (September 30, 2016)

SUMMARY OF THE INVENTION The present invention is directed to a case for protecting a toothbrush or an interdental toothbrush in which an antibacterial substance is mixed with a mixed resin composition comprising a polypropylene resin and an acrylate, And an antibacterial case for a toothbrush or an interdental toothbrush capable of hygienically carrying a toothbrush or an interdental toothbrush while effectively exhibiting its own sterilization and antibacterial performance.

In order to solve the above problems, the present invention provides a polypropylene resin composition comprising: a polypropylene resin; An acrylate copolymerized with a mixed composition comprising methyl methacrylate, 2-ethylhexyl acrylate, acrylic acid and azobisisobutyronitrile; Ethylene glycidyl methacrylate (EGMA); And an antibacterial case for an interdental toothbrush made by injection molding a mixed resin composition comprising zinc pyrithione.

The mixed resin composition may further comprise at least one powder selected from the group consisting of silica powder, kaolin powder, and scoria powder.

And the mixed resin composition is further composed of nano-montmorillonite.

Wherein the mixed resin composition comprises 60 to 120 parts by weight of a polypropylene resin; 50 to 70 parts by weight of methyl methacrylate, 20 to 30 parts by weight of 2-ethylhexyl acrylate, 5 to 10 parts by weight of acrylic acid and 2 to 3 parts by weight of azobisisobutyronitrile To 60 parts by weight; 2 to 8 parts by weight of ethylene glycidyl methacrylate (EGMA); And 0.5 to 1 part by weight of zinc pyrithione.

The antimicrobial case for toothbrush or interdental toothbrush is divided and formed into a body retractable type or a head retractable type so as to be wholly or partially accommodated corresponding to a toothbrush or interdental toothbrush to be accommodated.

According to the antibacterial case for a toothbrush or interdental toothbrush of the present invention, an antimicrobial substance is mixed with a mixed resin composition comprising a polypropylene resin and an acrylate to exhibit elasticity and impact strength at the same time, and the case itself can be sterilized and antimicrobial Toothbrush or interdental toothbrush To prevent the propagation of microorganisms, improve the efficiency of portable hygiene and eliminate the need for separate structures for sterilization, minimizing the weight of the case, improving the carrying performance, and reducing the manufacturing cost of the case product So that the price competitiveness can be improved.

1 (a) to 1 (c) illustrate various embodiments of an antimicrobial case according to an embodiment of the present invention.

The present invention relates to a resin composition comprising: a polypropylene resin; An acrylate copolymerized with a mixed composition comprising methyl methacrylate, 2-ethylhexyl acrylate, acrylic acid and azobisisobutyronitrile; Ethylene glycidyl methacrylate (EGMA); And an antibacterial case for an interdental toothbrush, which is formed by injection molding a mixed resin composition comprising zinc pyrithione.

Wherein the mixed resin composition further comprises at least one powder selected from the group consisting of silica powder, kaolin powder and scoria powder.

Wherein the mixed resin composition further comprises nano-montmorillonite.

Wherein the mixed resin composition comprises 60 to 120 parts by weight of a polypropylene resin; 50 to 70 parts by weight of methyl methacrylate, 20 to 30 parts by weight of 2-ethylhexyl acrylate, 5 to 10 parts by weight of acrylic acid and 2 to 3 parts by weight of azobisisobutyronitrile To 60 parts by weight; 2 to 8 parts by weight of ethylene glycidyl methacrylate (EGMA); And 0.5 to 1 part by weight of zinc pyrithione.

The antimicrobial case for toothbrush or interdental toothbrush is divided and formed into a body retractable type or a head retractable type so as to be wholly or partly accommodated corresponding to a toothbrush or interdental toothbrush to be accommodated.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

First, one embodiment of an antibacterial case for a toothbrush or interdental toothbrush according to the present invention is a base composition for forming a case molded article of a toothbrush or an interdental toothbrush, comprising: a polypropylene resin; An acrylate copolymerized with a mixed composition comprising methyl methacrylate, 2-ethylhexyl acrylate, acrylic acid and azobisisobutyronitrile; Ethylene glycidyl methacrylate (EGMA); And a zinc pyrithione (Zinc pyrithione).

In general, polypropylene resin has the density of 0.90 ~ 0.92g / ㎤, which is the lightest and transparent of the general purpose plastic, which is excellent in heat resistance, electrical insulation, chemical resistance and bending resistance, There is a drawback that strength is weak.

As a result of research on the modified resin capable of compensating the impact strength of the polypropylene resin, the present inventors have focused on the use of an acrylate mixed with a polypropylene resin.

The acrylate is a kind of thermoplastic resin in a synthetic resin and is flexible, has a high strength, is colorless and transparent, and has defects that are prone to scratches. In particular, methyl acrylate is flexible and used primarily in the middle layers of adhesives, paints, and synthetic glass, while methyl methacrylate is used where it is hard and requires impact strength.

Therefore, in the present invention, the use of methyl methacrylate, which is hard and has a high impact strength, and an acrylate copolymerized with 2-ethylhexyl acrylate and acrylic acid, which exhibit flexible properties, are mixed with a polypropylene resin, .

That is, the antibacterial case for a toothbrush or interdental toothbrush of the present invention comprises 60 to 120 parts by weight of a polypropylene resin; 50 to 70 parts by weight of methyl methacrylate, 20 to 30 parts by weight of 2-ethylhexyl acrylate, 5 to 10 parts by weight of acrylic acid and 2 to 3 parts by weight of azobisisobutyronitrile To 60 parts by weight of a mixed resin composition.

At this time, ethylene glycidyl methacrylate (EGMA) is used for commercialization of the polypropylene resin and acrylate, and the ethylene glycidyl methacrylate (EGMA) is an ethylene block and a glycidyl methacrylate methacrylate, and the ethylene block has an affinity with polypropylene. Glycidyl methacrylate has a carboxyl group (-COOH), a hydroxyl group (-OH), an amine group (-NH 2) And a polar group which is reactive with a functional group such as < RTI ID = 0.0 >

Therefore, in the present invention, a graft copolymer is formed between a polypropylene resin and ethylene glycidyl methacrylate (EGMA), and a graft copolymer is also formed between acrylates to form a mixed resin of a polypropylene resin and an acrylate Respectively.

Here, the ethylene glycidyl methacrylate (EGMA) should be used in an amount of 2 to 8 parts by weight in the present invention. When less than 2 parts by weight of ethylene glycidyl methacrylate (EGMA) is used, The graft copolymer of acrylate is insufficiently formed and the impact resistance is lowered. If it exceeds 8 parts by weight, the physical properties of the polyester are weakened, the hardness is increased, and the elasticity is lowered.

In addition, in the present invention, the weight of the acrylate mixed with 2-ethylhexyl acrylate and acrylic acid should not exceed the weight of methyl methacrylate. This is because the antibacterial case for toothbrush or interdental toothbrush of the present invention has an impact resistance of methyl methacrylate It is preferable to use 50 to 70 parts by weight of methyl methacrylate, 20 to 30 parts by weight of 2-ethylhexyl acrylate and 5 to 10 parts by weight of acrylic acid.

In particular, the mixed resin composition of the present invention comprises 60 to 120 parts by weight of a polypropylene resin; It is preferable to use 30 to 60 parts by weight of acrylate. This is because it is necessary to maintain the properties of the polypropylene resin and to exhibit the modifying effect of acrylate. It is preferable to use about twice the amount of acrylate used in the polypropylene resin.

On the other hand, pyrithione is a compound represented by the following formula (1), which is widely known as an antibacterial fluid of aspartic acid which inhibits the propagation of bacteria and has been widely applied to body protective products and the like. , Metal salts of pyrithione, including tin and cadmium and zirconium as excellent biocides, are suitable for use in shampoos, cosmetics and the like.

[Chemical Formula 1] represents the chemical structure of a pyrithione compound, which is determined by the arrangement of atoms and chemical bonds between respective corresponding atoms.

The above pyrithione compounds are classified into various types such as zinc pyrithione, copper pyrithione, sodium omadine, pyridine-N-oxide disulfide, pyridine-2-thione-N-oxide, Zinc pyrithione, which is more durable than other pyrithione salts due to its low solubility in brine, is used.

The zinc pyrithione has a molecular weight of 317.7 and has a property of dissolving very small amounts in a polar solvent or a non-polar solvent. The zinc pyrithione slowly elutes from the surface of the coating film and forms a complex with an enzyme containing contaminating biological substances, Inhibits growth and suppresses contamination mainly by microorganisms.

The zinc pyrithione is preferably used in an amount of 0.5 to 1.0 part by weight in the present invention. If the zinc pyrithione is used in an amount of less than 0.5 parts by weight, the antibacterial effect is lowered. If the zinc pyrithione is used in an amount exceeding 1.0 part by weight, .

The mixed resin composition of the present invention may further comprise at least one powder selected from the group consisting of silica powder, kaolin powder, and scoria powder.

Since silica is not produced in a free state in nature and exists as oxides, silicates, and the like, it is a main constituent component of the lithosphere. Therefore, it can be used as a raw material for various purposes such as an aliphatic decomposition ability, a cleansing ability, a human permeability, , And has excellent material properties such as vibration. In addition, silica is the source of all kinds of life, including human skin, blood vessels, bones, connective tissues, lymph nodes, hair, etc. It generates permanent weak current (0.04mA) and emits far infrared rays (4-14 microns) Has a well-known material property of being weakly alkaline at the same time as making the water molecule anionized.

The kaolin is hydrated aluminum silicate produced from a natural clay mineral, that is, a silicate mineral. The kaolin exhibits an excellent effect of purification, deodorization and purification by its large amount of anion, quantum energy and far-infrared ray releasing function. It is possible to maximize the function of emitting negative ions and far-infrared rays in the present invention.

The scoria is a mineral substance known as clay, that is, natural ceramics, which is fired by high-temperature heat generated by volcanic activity. It is a porous material with weak alkalinity. Especially, it has a far infrared ray emissivity of 93%, a antibacterial activity of 99.9% and a deodorization rate of 97% And thus it is preferable because it is applicable to the enhancement of the antibacterial activity.

In addition, the mixed resin composition of the present invention may further comprise nano-montmorillonite.

The montmorillonite (hereinafter referred to as MMT) As clay, it is abundant in nature, and is an economically very useful material and imparts excellent mechanical properties and chemical resistance.

In particular, the MMT has a layered structure of 1 to 3 nm thick platelets formed of ion-binding force or van der Walls attractive force. Since the MMT having a layered structure acts as a reinforcing material of the polymer, the mechanical strength of the polymer, Flame retardancy, abrasion resistance, heat resistance, and the like, it imparts excellent mechanical properties and chemical resistance of the antibacterial case for toothbrush or interdental toothbrush of the present invention.

The antimicrobial case for a toothbrush or interdental toothbrush manufactured from the mixed resin composition of the present invention is formed by melt injection molding the mixed resin composition as shown in Fig. 1, and a toothbrush or interdental toothbrush And is divided into a body retractable type or a head retractable type so as to be wholly or partly accommodated.

In the case of the above-mentioned body retractable type, as shown in Fig. 1 (a), a housing structure of a hinged structure capable of carrying the toothbrush or the interdental toothbrush as a whole is constituted. In the case of the head retractable type, the head restraint is divided into the general toothbrush use and the interdental toothbrush use, and the headrest is structured such that only the head portion of the toothbrush can be accommodated as shown in FIG. 1 (b) It is possible to form a tubular structure capable of accommodating only the head portion of the interdental toothbrush as shown in (c) of FIG.

Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. These examples are for further illustrating the present invention, and the scope of the present invention is not limited by these examples.

(Example 1)

A four-necked flask equipped with a temperature probe equipped with a mechanical stirrer, a reflux condenser, a dropping funnel and a controller was charged with 60 parts by weight of methyl methacrylate, 25 parts by weight of 2-ethylhexyl acrylate, 7 parts by weight of acrylic acid, 3 parts by weight of isobutyronitrile was added dropwise at a temperature of 110 to 120 占 폚 to form a mixture, and stirring was continued at the same temperature for 2 hours to prepare an acrylate. Then, 100 parts by weight of the polypropylene resin and 50 parts by weight And 5 parts by weight of ethylene glycidyl methacrylate (EGMA) and 0.7 part by weight of zinc pyrithione were mixed to prepare a mixed resin composition of the present invention.

(Comparative Example 1)

In Example 1 described above, resin composition was prepared using only pure polypropylene resin without using zinc pyrithione.

[Experimental Example]

(Antibacterial test)

The resin compositions prepared in [Example 1] and [Comparative Example 1] were applied to specimens each having a size of 5 cm x 5 cm in width and each specimen of [Example 1] and [Comparative Example 1] Two kinds of strains were used separately. Escherichia coli ATCC 8739 and staphylococcus aureus ATCC 6538P were used as bacterial strains. The bacterial concentration (CFU / mL) of Escherichia coli was 2.7 × 10 ⁵ , Staphylococcus aureus 3.8 × 10 ⁵ , And KCL-FIR-1003, respectively. The results are shown in Table 1 below.

Test items (antibacterial test) Test result Test environment Initial concentration
(CFU / mL) Concentration after 24 hours
(CFU / mL) Bacterial reduction rate
(%) Escherichia coli Example 1 2.7 × 10 ⁵ <10 99.9 37 ℃ Comparative Example 1 2.7 × 10 ⁵ 6.0 × 10 ⁶ - Staphylococcus aureus Example 1 3.8 × 10 ⁵ <10 99.9 Comparative Example 1 3.8 × 10 ⁵ 4.0 × 10 ⁶ -

As can be seen from the above Table 1, in the resin composition (Example 1) to which zinc pyrithione was applied rather than the resin composition (Comparative Example 1) which did not use zinc pyrithione, both of Escherichia coli and Staphylococcus aureus And the antibacterial performance is excellent.

(Impact strength test)

The resin compositions prepared in [Example 1] and [Comparative Example 1] were each injected at 240 캜 and Izod impact strength was measured according to ASTM D256. The results are shown in Table 2 below.

Izod impact strength Example 1 Comparative Example 1 kJ / m2 5.2 2.8

As shown in Table 2, it can be seen that the antibacterial case for toothbrush or interdental toothbrush of the present invention has excellent impact strength.

That is, according to the antibacterial case for a toothbrush or interdental toothbrush constructed as described above, an antibacterial substance is mixed with a mixed resin composition comprising a polypropylene resin and an acrylate to exhibit elasticity and impact strength at the same time, And the antibacterial function is improved to prevent the propagation of harmful microorganisms in the toothbrush or the interdental toothbrush while improving the portable hygiene efficiency and the separate structure for sterilizing action is unnecessary, thereby minimizing the weight of the case and enhancing the portable performance, It is possible to improve the price competitiveness by reducing the manufacturing cost of the product.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments and the drawings disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (5)

A case for protecting a toothbrush or an interdental toothbrush, comprising: a polypropylene resin; An acrylate copolymerized with a mixed composition comprising methyl methacrylate, 2-ethylhexyl acrylate, acrylic acid and azobisisobutyronitrile; Ethylene glycidyl methacrylate (EGMA); Zinc pyrithione; Characterized in that the platelets having a thickness of 1 to 3 nm are composed of nano-montmorillonite having a layered structure. The antimicrobial case for toothbrush or interdental toothbrush
delete delete delete The method according to claim 1,
Characterized in that the antibacterial case for toothbrush or interdental toothbrush is divided and formed into a body retractable type or a head retractable type so as to be wholly or partly accommodated corresponding to a toothbrush or interdental toothbrush to be accommodated.

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