WO2017155252A1

WO2017155252A1 - Dual-structured filament

Info

Publication number: WO2017155252A1
Application number: PCT/KR2017/002353
Authority: WO
Inventors: 강기태; 김성진; 황소희
Original assignee: 비비씨 주식회사
Priority date: 2016-03-09
Filing date: 2017-03-03
Publication date: 2017-09-14
Also published as: KR101826632B1; KR20170105287A

Abstract

Disclosed is a dual-structured filament comprising: a triangular bar-shaped core; and a sheath in the center of which the core is embedded, wherein the sheath has the shape of an inverted triangular pipe having the core embedded in the center thereof. The filament according to the present invention comprises core and sheath made of differing materials, and has high strength and durability as well as superb flexibility and elasticity to thus reduce irritation and damage to the gums from tooth brushing and double the effectiveness thereof.

Description

Double structure filament

The present invention relates to a filament used as a bristle, and more particularly, to a filament of a double structure in which the sheath forming the center of the filament and the core forming the outline thereof are made of different materials.

Effective plaque removal and gum disease prevention are important to maintain healthy teeth. To effectively remove plaque, the bristles must reach all areas, including teeth, between teeth (interdentals). In particular, it is desirable to allow the bristles to reach the rear of the molars deep within the mouth so that the brushing can be done evenly.

In general, the monofilament used in the toothbrush can be divided into nylon monofilament and polyester monofilament according to the material.

Monofilament made of nylon has an advantage of preventing damage to the gums due to moderate flexibility and elasticity, but has the disadvantage of high hygroscopicity and easy wear. Such nylon monofilaments must be designed to have a predetermined thickness or more in order to have the necessary cleaning power.

On the other hand, the monofilament of the polyester material (polybutylene terephthalate or polyethylene terephthalate, etc.) has the advantage of high strength, excellent durability and low hygroscopicity compared to nylon monofilament. However, the flexibility and elasticity is low, there is a risk of irritating the gums when brushing teeth.

Korean Patent Registration No. 10-0271580 (2000.08.17.) Discloses a toothbrush having bristles mainly composed of silicone and nylon.

Conventional toothbrushes include a toothbrush bag having a bristles receiving portion at one end, a base detachably installed at the bristle receiving portion, and a bristle member formed at an upper portion of the base, wherein the bristle members are silicone bristle and nylon. Brush heads are provided alternately.

The toothbrush described above reinforces the strength of the disadvantages of nylon by adding silicone bristles to the nylon bristles, but the plaque is not effectively removed, and thus, there is a lack of sufficient cleaning power.

The present invention is to solve the above-mentioned problems of the prior art, an object of the present invention is a filament containing a core and a sheath of different materials, the strength of the dual structure that can have flexibility and elasticity while having excellent durability To provide the filament.

Another object of the present invention is to provide a dual-structured filament capable of sharpening the end portion, thereby improving the plaque removal and the desorption efficiency of the food remaining in the interdental and gums.

Still another object of the present invention is to provide a filament having a double structure, which is formed in a twisted form between both ends of the filament, which can double the strength and elasticity as the filament.

Still another object of the present invention is to provide a double-structured filament that can produce various colors by inducing light refraction because the sheath surrounding the core has a triangular cross-sectional shape.

The present invention for achieving the above object is a core (core) forming a triangular bar (bar); And a sheath in which the core is embedded in the central portion, wherein the sheath discloses a double structure filament, wherein the core forms a pipe of an inverted triangle in which the core is embedded in the central portion.

Preferably, the core is exposed to the outside through the outer edge of the sheath.

Preferably, the core further includes a friction protrusion formed at an edge exposed to the outside of the sheath.

The friction protrusion is made of a curved surface, extending along the corner, it is preferable that the irregularities are formed on the outside.

It is preferable that the said filament has at least the edge part of the sheath and the said sheath and the core being sharply formed.

The filament is preferably in the form of a twist in the longitudinal direction between at least one end selected from the sheath and the core.

It is preferable that the said core and the sheath are different materials.

It is preferable that the said core is 1 type, or 2 or more types chosen from ethylene- alpha olefin elastomer, a propylene- alpha olefin elastomer, a thermoplastic olefin elastomer, a thermoplastic styrene elastomer, a urethane thermoplastic elastomer, or a mixture thereof.

The core is preferably one selected from polylactic acid (PLA), polycaprolactone (PCL), poly hydroxy al kanoate (PHA), and polybutylene succinate (PBS).

It is preferable that the said core is silicone or a silicone type compound.

It is preferable that the said sheath is 1 type, or 2 or more types chosen from a polyethylene terephthalate, a polybutylene terephthalate, a polytrimethylene terephthalate, a polycyclohexane dimethylene terephthalate, or a copolymer thereof.

According to an embodiment of the present invention, as a filament including cores and sheaths of different materials, high strength and durability, as well as flexibility and elasticity can reduce gum irritation and damage due to brushing and double the effect of brushing. It was made.

In addition, the present invention by processing the end sharply, it is possible to increase the efficiency of plaque removal and desorption of the food remaining in the interdental and gums, thereby doubling the effect of caries prevention.

In addition, the present invention is made of a twisted form between the both ends of the filament, to double the strength and elasticity as the filament to increase the effect on the teeth and minimize the damage.

In addition, the present invention is because the sheath surrounding the core has a triangular cross-sectional shape, it is possible to produce a variety of colors by inducing the refraction of light, and thus not only improve the aesthetic appearance of the appearance, but also stimulate the curiosity of the user You can expect the effect to make your teeth fun.

1 is a perspective view for explaining a filament according to an embodiment of the present invention,

2 is a cross-sectional view of the filament shown to explain an example of a core according to an embodiment of the present invention;

3 is a perspective view illustrating an example of a filament according to an embodiment of the present invention, and

4 is a perspective view illustrating another example of a filament according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In the description of the present invention, terms defined are defined in consideration of functions in the present invention, which may vary according to the intention or custom of a person skilled in the art and the definitions are based on the contents throughout this specification. Will have to be lowered.

1 is a perspective view showing to explain the filament according to an embodiment of the present invention.

As shown in the figure, the filament 100 includes a core 110 and a sheath 120 surrounding the outside of the core 110.

The core 110 forms a triangular solid bar shape and is intended to prevent the gums from being damaged when the filament 100 is brushed to provide flexibility and elasticity.

The core 110 may be used without limitation as long as it is a thermoplastic elastomer resin having a predetermined coefficient of friction. For example, the coefficient of friction of the thermoplastic elastomer resin used in the core 110 of the present embodiment is 0.2 to 0.9, when having a friction coefficient of this range, the friction between the bristles and gums, and the bristles and teeth is appropriately adjusted, Or cleaning power can be maximized without damaging the teeth.

On the other hand, if the friction coefficient is less than 0.2, it causes a problem that the cleaning power is lowered, if the friction coefficient exceeds 0.9 can cause a problem that the gum is easily damaged with only a slight pressure.

The thermoplastic elastomer series described above includes ethylene-? Olefin elastomers such as ethylene-hexene elastomers, ethylene-octene elastomers, propylene-hexene elastomers, propylene-octene elastomers, propylene-?-Olefin elastomers, ethylene-propylene- Thermoplastic olefin elastomers including diene elastomers and the like.

Further, styrene-butadiene block copolymer, styrene-isoprene block copolymer, hydrogenated styrene-butadiene elastomer, styrene-butadiene-styrene elastomer, styrene-ethylene-butylene-styrene elastomer, styrene-ethylene-propylene-styrene Thermoplastic styrene-based elastomers or urethane-based thermoplastic elastomers, including elastomers and the like.

The core 110 of the present embodiment can be used alone or a mixture of the above-described thermoplastic olefin elastomer, thermoplastic styrene elastomer, urethane-based thermoplastic elastomer.

In addition, the core 110 may be made of a biodegradable resin having excellent high temperature molding processability. For example, polylactic acid (PLA), polycaprolactone (PCL), poly hydroxy al kanoate (PHA), and polybutylene succinate (PBS) may be used alone or in combination thereof.

The core 110 may be made of silicon or a silicon-based compound.

On the other hand, the core 110 may further contain a cleaning power improver. The elastic resin itself is also excellent in cleaning power, but by including a cleaning power improving agent, it is possible to maintain the initial cleaning power, in particular, to provide a refreshing brushing while minimizing the irritation to the gums.

The cleaning power improving agent is one or two or more selected from fluorinated olefin polymer, boron nitride, molybdenum disulfide, graphite, fullerene or talc, and is effective for improving cleaning power.

The content of the detergency enhancer is preferably 0.01 to 10 parts by weight, more preferably 1 to 5 parts by weight based on 100 parts by weight of the elastic resin. If the content of the detergent enhancer is less than 0.01 parts by weight, the effect of improving the cleaning power is insignificant. If it is more than 10 parts by weight, the compatibility with the elastic resin is poor and the strength and elasticity of the elastic resin are weakened. May occur.

On the other hand, it may further contain an additive or coating agent, for example, may include inorganic additives, antimicrobial additives, salt additives, whitening additives, vitamin additives and the like.

The inorganic additive may use any one or a mixture thereof selected from silicon dioxide, aluminum hydroxide, calcium carbonate, silica, bentonite clay, calcium phosphate, dicalcium phosphate or anhydrous calcium diphosphate, and the antimicrobial additive may be silver nano powder, platinum nano Powder, charcoal powder, TiO 2, TiON, fluorine or mixtures thereof may be used, but is not limited thereto. In addition, salts, bamboo salt, pine salt, sea salt and the like can be used.

The above-described additive is added to the filament 100, in particular the core 110 to continuously dissolve a small amount every time you brush your teeth.

On the other hand, incorporating a pigment in the core 110 of the filament 100 or when applying a color change film may cause a user aesthetics. For example, the use of color-changing film over temperature can stimulate children's curiosity and help them enjoy brushing their teeth.

The sheath 120 forms a triangular pipe shape surrounding the outer shell of the core 110 and exists as an element for increasing the strength of the filament 100 to improve the durability of the bristles.

The sheath 120 is preferably a polyester resin, but more preferably polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polycyclohexanedimethylene terephthalate may be used. For example, when fabricating one or two or more selected from copolymers of the aforementioned materials, the strength of the filament 100 can be effectively improved.

On the other hand, when the sheath 120 positioned outside the filament 100 is a rigid resin, the cleaning power may be reduced by the core 110 including the elastic resin. In this case, the strength of the filament 100 may be reduced due to the rigid resin. It becomes higher than necessary, and there exists a possibility of damaging a gum by high strength.

Therefore, in the case of the dual structure filament 100 including the core 110 of the elastic resin and the sheath 120 of the rigid resin, at least a part of the core 110 may be exposed to the outside.

As described above, the double-structured filament 100 according to the present embodiment has a structure in which at least a part of the core 110 is exposed to the outside of the sheath 120 so as to have high strength and excellent durability but flexibility and elasticity. In more detail, at least the core 110 and the filament 100 may have various structures as shown in FIGS. 1 to 4, which will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the core 110 has a triangular bar shape extending in one direction, and the sheath 120 surrounds the core 110 and has a relatively thick triangular cross section compared to the core 110. It is a pipe shape.

The core 110 penetrates the center of the sheath 120 and extends in the longitudinal direction, and has an inverted triangular cross section corresponding to the inside of the sheath 120, wherein each corner 111 of the core 110 is a sheath 120. ) It extends to the outside and is exposed to the outside.

Therefore, the filament 100 of the above-described structure is the core of the elastic resin 110 and the rigid resin

Since the sheath 120 includes all of the filaments 100 to have a strength of less than the reference value to prevent the gums from being damaged when brushing teeth.

In addition, since the edge 112 of the core 110 exposed to the outside of the sheath 120 has a predetermined coefficient of friction, the plaque may be effectively removed upon contact with the tooth.

The core 110 may have various forms, which will be described with reference to FIG. 2.

2 is a plan view of a filament shown to explain an example of a core according to a preferred embodiment of the present invention.

As shown in the drawing, the core 110 is embedded in the center of the sheath 120, and the edge 111 may be exposed to the outside of the sheath 120 as in each embodiment, or may be exposed to the outside.

Figure 2a shows the edge 111 of the core 110 is in contact with the outside of the sheath 120 exposed to the outside, which is an embodiment of the present invention.

2b shows the shape of the edge 111 of the core 110 protruding from the outside of the sheath 120, which is another embodiment of the core 110, to effectively remove the plaque upon contact with the tooth. That is, since the edge 111 protruding from the outer sheath 120 has a predetermined coefficient of friction, the plaque can be effectively removed.

2C illustrates a modification of the edge 111 protruding outside the sheath 120, and as shown, the edge 111 protrudes outside the sheath 120 as a friction protrusion 113 partially enclosing the outer edge thereof. May exist.

Since the friction protrusion 113 has a predetermined coefficient of friction, the plaque can be effectively removed when it comes in contact with the teeth, and in particular, since the cross section has a curved surface covering at least a part of the side surface of the sheath 120, The large contact area with the teeth allows for more effective removal of plaque. In this case, a plurality of irregularities may be further formed on the outer circumferential surface of the friction protrusion 113.

Meanwhile, although not illustrated, the core 110 may be recessed than the sheath 120 or may protrude as illustrated in FIGS. 3 and 4, which will be described with reference to the drawings.

3 is a perspective view showing an example of a filament according to an embodiment of the present invention.

As shown, the core 110 may protrude more than the sheath 120. The core 110 uses a core 110 longer in length than the sheath 120 so as to protrude from the end of the sheath 120, that is, by the length, or sharply process one or both sides through processing. By doing so, the core 110 may protrude to the outside.

In this case, chemical processing is used. For example, one or both ends of the filament 100 may be immersed in an alkaline or acidic solution, respectively, and processed as shown in FIGS. 3A and 3B.

In FIG. 3A, the core 110 protrudes more than the sheath 120. At this time, although not shown at the end, the core 110 may be formed to have an unevenness, thereby improving cleaning power when brushing teeth.

3b shows that the end is sharply processed, and since the core 110 having a predetermined coefficient of friction is exposed to the top, not only can the plaque be effectively removed upon contact with the teeth, but also the end is sharp, so that between interdentals, of course, In addition, desorption of foreign substances remaining in the gums is made easier.

On the other hand, the filament 100 may have a twisted shape as shown in Figure 4 between at least both ends.

Torsion of the filament 100 is made by processing or molding, and this torsion increases the strength and elasticity as the filament 100 to double the durability as bristles, and in particular, the restoring force can be maximized to maximize the effect on brushing. .

For example, the filament 100 is twisted between both ends in the state that the processing is not applied as shown in Figure 4a, or twisted between both ends in the state that the end of the filament 100 is processed as shown in Figure 4b and c You can also

Here, FIG. 4B is torsion applied in the form of FIG. 3A, and FIG. 4C is torsion applied in the form of FIG. 3A.

Therefore, the resilience is excellent in repetitive exercise, and as a result, it is possible to minimize the damage to prevent functional degradation, as well as long-term use can eventually minimize the economic loss due to toothbrush replacement.

Although the present invention has been described in more detail with reference to the examples, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not stabilized by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

A core in the form of a triangular bar; And

And a sheath in which the core is embedded in a central portion thereof.

The sheath is a dual-structured filament, characterized in that the core forms an inverted triangular pipe shape embedded in the central portion.
The method of claim 1,

The core is,

A filament of dual structure, characterized in that the edge is exposed to the outside through the outside of the sheath.
The method of claim 2,

The core is,

The filament of the dual structure, characterized in that it further comprises; friction projections formed on the edge exposed to the outside of the sheath.
The method of claim 3,

The friction protrusion,

A filament having a curved surface, extending along the edge, and having irregularities formed on an outer surface thereof.
The method of claim 4, wherein

The filament is,

At least an end portion of the sheath and the core of the sheath and the sharply formed filament of the dual structure.
The method of claim 5,

The filament is,

The filament of the dual structure characterized in that the longitudinal twist between the at least one end selected from the sheath and the core.
The method according to any one of claims 1 to 6,

The core and the sheath,

The filament of the dual structure, characterized in that the heterogeneous material.
The method of claim 7, wherein

The core is,

A double-structured filament, characterized in that one or more selected from ethylene-? Olefin elastomers, propylene-? Olefin elastomers, thermoplastic olefin elastomers, thermoplastic styrene elastomers, urethane-based thermoplastic elastomers, or mixtures thereof.
The method of claim 7, wherein

The core is,

A double-structured filament, characterized in that it is one selected from PLA (polylactic acid), PCL (polycaprolactone), PHA (Poly hydroxy al kanoate), PBS (polybutylene succinate).
The method of claim 7, wherein

The core is,

A double structure filament, characterized in that the silicon or silicon compound.
The method of claim 7, wherein

The sheath,

A double-structured filament characterized in that one or two or more selected from polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polycyclohexanedimethylene terephthalate or a copolymer thereof.