WO2017155253A1

WO2017155253A1 - Dual-structured filament

Info

Publication number: WO2017155253A1
Application number: PCT/KR2017/002354
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: KR20170105288A; KR101826720B1

Abstract

Disclosed is a dual-structured filament comprising: a bar-shaped core; and a sheath in the center of which the core is embedded, wherein the core comprises a circular bar-shaped central part and one or more radial wings around the perimeter of the central part. 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 bristles, and more particularly, to a filament of a dual structure in which the core forming the center of the filament and the sheath forming the outer sheath 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.

The present invention for achieving the above object is a core (core) to form a bar; A sheath in which the core is embedded in a central portion thereof; The core has a central portion having a circular rod shape. Disclosed is a dual structure filament comprising at least one wing radially formed outside the central portion.

The wing is preferably exposed to the outside through the outside of the sheath.

Preferably, the core further includes a friction protrusion formed at the wing end to protrude out of the sheath.

The friction protrusion, the outer surface is made of a curved surface, it is preferable that the elongated formed along the sheath.

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.

Preferably, the blades are disposed radially in the form of spirals along the longitudinal direction of the central portion.

It is preferable that the filament has a shape in which at least one of both ends selected from the sheath and the core is twisted in the longitudinal direction.

The sheath is any one of a bar selected from a circle and a polygon, and in the case of a circle, the diameter ratio of the core has a ratio of 1: 1 to 5, and the length ratio of the core and the blade is 1 : It is preferable that it is 1-5.

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.

As a filament including the core and the sheath of different materials according to the present invention as described above, the strength and durability, as well as excellent flexibility and elasticity to reduce gum irritation and damage caused by brushing teeth and to double the effect of brushing It was.

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.

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

2 is a plan view illustrating an example of a coil according to an exemplary embodiment of the present invention;

3 is a plan view showing an example of a sheath according to a preferred embodiment of the present invention;

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

5 is a perspective view illustrating another example of the filament according to the preferred 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 is intended to prevent gums from being damaged when brushing by giving flexibility and elasticity as bristles at the center of the filament 100.

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 be further added to the 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 elute a small amount each time you brush your teeth.

The sheath 120 surrounds 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 5, which will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the filament 100 includes a core 110 that gives the filament 100 flexibility and elasticity at its center and a sheath 120 to increase durability at the outer edge thereof to increase durability. do.

The core 110 is embedded in the center of the sheath 120, and includes a central portion 111 forming a circular bar shape, a plurality of wings 113 formed radially outside the central portion 111, the wings 113 The end portion extends to the outer circumferential surface of the sheath 120 and is exposed to the outside.

The core 110 has a predetermined ratio with the sheath 120, through which can maximize the effect of the brushing, a description thereof will be described with reference to FIG.

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

As shown in FIG. 2A, the diameter ratio D1: D2 of the core 110 and the sheath 120 is preferably 1: 1 to 5.

If the diameter ratio of the core 110 and the sheath 120 is less than 1: 1, the strength may be high, and the gums may be damaged. If the diameter ratio of the core 110 and the sheath 120 exceeds 1: 5, the elasticity may be greater. This raises the possibility of lowering the cleaning power.

Accordingly, the filament 100 preferably has a ratio of the diameter of the core 110 and the sheath 120 in a ratio of 1: 1 to 5, which causes the filament 100 to have an optimal strength and elasticity through an appropriate diameter ratio. Because it is maintained.

On the other hand, the diameter ratio of the core 110 and the length ratio (D1: L) of the blade 113 is preferably 1: 1 to 5, which is the blade 113 is extended to the outer peripheral surface of the sheath 120 to the sheath 120 It is to be exposed to the outside of) but not to protrude further.

However, this is one embodiment, at least the length of the wing 113 can be formed longer than D1, as well as it can lead to a synergistic effect, which is shown in Figure 2b and c showing an example of the core 110 This will be described with reference to.

2B is for explaining an example of the wing 113, the wing 113 is formed longer than D2 as shown, the end of which protrudes outside the sheath 120.

Since the wing 113 protruding outside the sheath 120 has a predetermined coefficient of friction, it is possible to effectively remove the plaque when it comes in contact with the teeth, thus maximizing the effect of preventing tooth decay and tooth decay. There is this.

In addition, the wing 113 may be further formed with a friction protrusion 115 at the protruding end as shown in Figure 2c. The friction protrusion 115 is made of a curved outer surface, it is present in the form surrounding the outer portion along the longitudinal direction of the sheath 120.

The friction protrusions 115 allow the plaque to be efficiently removed by expanding the contact area with the teeth and increasing the coefficient of friction. At this time, although not shown in the outer portion of the friction protrusion 115, a plurality of irregularities may be further formed, which may double the friction coefficient and plaque removal efficiency.

Meanwhile, the sheath 120 may exist in various forms as shown in FIG. 3 as a wrapping form of the core 110, which will be described with reference to FIG. 3.

3 is a plan view illustrating an example of a sheath according to an embodiment of the present invention.

As shown in the figure, the sheath 120 surrounds the core 110 and is not limited in shape. Therefore, as shown in FIG. 2, a shape of a plane or a longitudinal section such as a triangle, a quadrangle as in FIG. 3B, a pentagon as in FIG. 3C, and the like may be variously formed.

At this time, the number of the wings 113 may be limited according to the shape of the sheath 120 as the core 110. That is, in the case of a triangular, it is preferable that the three wings are arranged radially with respect to the central portion 111 so as to correspond to the center orthogonal to each side, it is very preferable that four in the case of quadrangular and five in the case of five-angle.

However, the number of wings 113 is not limited to the figure, and may be arranged daily, in particular, if the sheath 120 is circular, as shown in Figure 2 selectively multiple depending on the strength and elasticity (for example, 1 To 10).

Meanwhile, although not illustrated, the core 110 may be recessed than the sheath 120 or may protrude as illustrated in FIGS. 4 and 5, which will be described with reference to the drawings.

4 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 is a step by the length, that is, by using a core 110 longer than the sheath 120 so as to protrude from the end of the sheath 120, or by processing at least one side sharply by processing 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 dipped in an alkali or acidic solution, respectively, and processed as shown in FIGS. 4A and 4B.

In FIG. 4A, the core 110 protrudes more than the sheath 120. At this time, although not illustrated at the end, the core 110 may improve the cleaning power when brushing the teeth.

4b 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 when contacting the tooth, 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 5 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.

Here, the torsion is preferably generated or generated in at least one of the core 110 and the sheath 120, at least the wings are arranged in the form of a spiral along the longitudinal direction of the central portion 111, or by the wing 113 may be twisted in the form of a spiral.

For example, the filament 100 has a shape in which the end of the filament 100 is twisted in the longitudinal direction between at least one end selected from the sheath 120 and the core 110 in the state that the end machining is not applied, or the wing 113 may be arranged in the form of a spiral.

In addition, the filament 100 may be a twisted form between the two ends in the state (sharply) processing the end, as shown in Figure 5b, or may be arranged sharply the blade 113 is arranged in the form of a spiral.

Here, the processing may be processed to bend the corner region (boundary and side boundaries) as well as sharp processing as shown, which is preferably processed selectively according to the brushing effect.

As described above, only the two ends of the filament 100 have a twisted shape, and thus, strength and elasticity are reinforced, so that the resilience is excellent even in repetitive movements, thereby minimizing damage, thereby preventing a decrease in function. The long-term use ensures that the economic loss due to toothbrush replacement is minimized.

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 bar;

A sheath in which the core is embedded in a central portion thereof;

The core has a central portion having a circular rod shape. Dual structure filament characterized in that it comprises at least one wing formed radially outside the central portion.
The method of claim 1,

The wing,

The filament of the dual structure characterized in that it 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; a friction projection formed on the wing end protruding out of the sheath.
The method of claim 3,

The friction protrusion,

An outer filament having a curved surface and extending along the sheath.
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 wing,

The filament of the dual structure characterized in that disposed radially in the form of a spiral along the longitudinal direction of the center.
The method of claim 5,

The filament is,

Double filament, characterized in that the at least one end is selected from the sheath and the core is twisted in the longitudinal direction.
The method of claim 1,

The sheath,

It is one of the bars (round) and polygon selected.

In the case of a circular shape, the diameter ratio of the core has a ratio of 1 to 1, and the length ratio of the core and the blade is 1: 1 to 5, characterized in that the dual structure filament.
The method according to any one of claims 1 to 8,

The core and the sheath,

The filament of the dual structure, characterized in that the heterogeneous material.
The method of claim 9,

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 9,

The core is,

A double-structured filament, characterized in that the PLA (polylactic acid), PCL (polycaprolactone), PHA (Poly hydroxy al kanoate), PBS (polybutylene succinate).
The method of claim 9,

The core is,

A double structure filament, characterized in that the silicon or silicon compound.
The method of claim 9,

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.