KR101826632B1

KR101826632B1 - Dual structure filament

Info

Publication number: KR101826632B1
Application number: KR1020160028309A
Authority: KR
Inventors: 강기태; 김성진; 황소희
Original assignee: 비비씨 주식회사
Priority date: 2016-03-09
Filing date: 2016-03-09
Publication date: 2018-02-07
Also published as: KR20170105287A; WO2017155252A1

Abstract

The present invention relates to a core comprising a triangular bar shape; And a sheath in which the core is embedded in a central portion, wherein the sheath is in the form of an inverted triangular pipe in which the core is contained in the central portion.
According to the embodiment of the present invention, filaments having different cores and sheaths have high strength and durability as well as excellent flexibility and elasticity, which can reduce gum irritation and damage caused by brushing teeth, Respectively.

Description

Dual structure filament < RTI ID = 0.0 >

The present invention relates to a filament used as a bristle, and more particularly, to a filament having a double structure in which a core forming a filament and a core forming an outer periphery thereof are made of different materials.

Effective plaque removal and gum disease prevention are important to maintain healthy teeth. To effectively remove the plaque, the bristles must reach all areas of the tooth, between the teeth and between the teeth (interdental). Particularly, it is desirable to allow the bristles to reach the back of the molar teeth deep in the mouth so that the brushing can be performed evenly.

Generally, monofilaments used in toothbrushes can be classified into nylon monofilament and polyester monofilament, depending on the material.

The monofilament made of nylon has an advantage of being able to prevent the gum from being damaged because it has moderate flexibility and elasticity, but has a 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 required cleaning power.

On the other hand, a monofilament made of a polyester material (such as polybutylene terephthalate or polyethylene terephthalate) has a strength higher than that of a nylon monofilament, an excellent durability and a low hygroscopicity. However, flexibility and elasticity are so low that it can irritate and damage the gums when brushing teeth.

Korean Patent Registration No. 10-0271580 (Aug. 17, 2000) discloses a toothbrush having bristles mainly composed of silicone and nylon.

A conventional toothbrush includes a toothbrush bag having a bristle receiving portion formed at one end thereof, a base detachably installed in the bristle receiving portion, and a bristle member formed on an upper portion of the base, wherein the bristle member includes a silicone bristle, Characterized in that bristles are alternatively provided.

The toothbrush described above reinforces the disadvantage of nylon material by adding silicone bristles to the nylon bristles, but it is somewhat deficient in having the required cleaning power because the plaque can not be removed effectively.

Korean Patent No. 10-0271580 (August 17, 2000)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a filament comprising a core and a sheath of different materials and having a high strength and excellent durability, Filament < / RTI >

Another object of the present invention is to provide a filament having a double structure capable of sharpening the end portion thereof to remove plaque and increase the efficiency of removing food remaining in the teeth and gums.

It is still another object of the present invention to provide a filament having a double structure in which both ends of the filament are twisted so as to increase the strength and elasticity as filaments.

It is another object of the present invention to provide a filament having a triangular cross-sectional shape, which is capable of inducing refraction of light to produce various colors.

According to an aspect of the present invention, there is provided a semiconductor device comprising: a core in the form of a triangular bar; And a sheath in which the core is embedded in a central portion, wherein the sheath is in the form of an inverted triangular pipe in which the core is contained in the central portion.

It is preferable that the cores are exposed to the outside through corners of the sheath.

The core may further include a friction protrusion formed on an edge exposed to the outside of the sheath.

Preferably, the friction protrusions are curved surfaces and extend along the corners, and protrusions and protrusions are formed on the outsides.

In the filament, at least the end portion of the sheath of the sheath and the core is preferably formed to be sharp.

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

The core and the sheath are preferably made of different materials.

It is preferable that the core is at least one selected from the group consisting of an ethylene-? Olefin elastomer, a propylene-? 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), polyhydroxyalkanoate (PHA), and polybutylene succinate (PBS).

The core is preferably silicon or a silicon compound.

The sheath is preferably one or more selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polycyclohexanedimethylene terephthalate, and copolymers thereof.

According to the embodiment of the present invention, filaments having different cores and sheaths have high strength and durability as well as excellent flexibility and elasticity, which can reduce gum irritation and damage caused by brushing teeth, Respectively.

In addition, the present invention can sharpen the ends to increase the efficiency of plaque removal and removal of food remaining on the teeth and gums, thus doubling the effect of tooth decay prevention.

In addition, the present invention has a configuration in which both ends of filaments are twisted so as to increase the strength and elasticity as filaments, thereby enhancing the effect of brushing and minimizing damage.

Further, since the sheath surrounding the core has a triangular cross-sectional shape, it is possible to induce refraction of light to produce a variety of colors, thereby enhancing the aesthetics of the appearance and stimulating the curiosity of the user It is possible to expect an effect that the toothbrushing can be enjoyed.

1 is a perspective view illustrating a filament according to a preferred embodiment of the present invention,
2 is a cross-sectional view of a filament to illustrate an example of a core according to a preferred embodiment of the present invention,
3 is a perspective view for explaining an example of filaments according to a preferred embodiment of the present invention,
4 is a perspective view for explaining another example of the filament according to one preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the present invention, the defined terms are defined in consideration of the function of the present invention, and it can be changed according to the intention or custom of the technician working in the field, and the definition is based on the contents throughout this specification It should be reduced.

1 is a perspective view illustrating a filament according to one preferred embodiment of the present invention.

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

The core 110 is in the form of a triangular solid bar for preventing the gums from being damaged when the filament 100 is given a softness and elasticity to brush the teeth.

Such a core 110 can be used without restrictions 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 the frictional coefficient is in this range, the frictional force between the bristles and the gums, and between the bristles and the teeth, Or the cleaning force can be maximized without damaging the teeth.

On the other hand, if the coefficient of friction is less than 0.2, the detergency is lowered. If the coefficient of friction is more than 0.9, the gum may be easily damaged by only a slight pressure.

Examples of the thermoplastic elastomer series include ethylene-α-olefin elastomers such as ethylene-hexene elastomer and ethylene-octene elastomer, propylene-hexene elastomer, propylene- And a thermoplastic olefin-based elastomer including a diene-based elastomer.

Examples of the styrene-butadiene block copolymer include styrene-butadiene block copolymer, styrene-isoprene block copolymer, hydrogenated styrene-butadiene elastomer, styrene-butadiene-styrene elastomer, styrene- A thermoplastic elastomer or a urethane-based thermoplastic elastomer including a thermoplastic elastomer and a thermoplastic elastomer.

The core 110 of the present embodiment may be used alone or in combination with the above-mentioned thermoplastic olefin elastomer, thermoplastic styrene elastomer and urethane thermoplastic elastomer.

Further, the core 110 can be made of a biodegradable resin excellent in high-temperature molding processability. For example, polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA) and polybutylene succinate (PBS) may be used alone or in combination.

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

On the other hand, the core 110 may further contain a detergency improving agent. The elasticity of the elastic resin itself is excellent, but the initial cleaning force can be maintained by including the detergency improving agent. In particular, the sensation of being applied to the gums can be minimized, and a refreshing sensation can be provided.

The detergency improver is effective for improving the detergency of the cleaning composition, wherein the detergency improver is one or more selected from a fluorinated olefin polymer, boron nitride, molybdenum disulfide, graphite, fullerene or talc.

The content of the detergency improver 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. When the content of the detergency improver is less than 0.01 part by weight, the effect of improving the detergency is insignificant. When the amount of the detergent 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. Lt; / RTI >

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

The inorganic additive may be any one selected from silicon dioxide, aluminum hydroxide, calcium carbonate, silica, bentonite clay, calcium phosphate, dicalcium phosphate or calcium dihydrogen phosphate or a mixture thereof. Antimicrobial additives include silver nano powder, Powder, charcoal powder, TiO2, TiON, fluorine, or a mixture thereof may be used. In addition, salt salts such as bamboo salt, sea salt, sea salt and the like may be used.

The above-mentioned additive is added to the filament 100, particularly the core 110, so that it is continuously eluted at a minute amount every time the gargle is applied.

On the other hand, when the pigment 110 is incorporated into the core 110 of the filament 100 or a color changing film is applied, the user may be aesthetized. For example, using a color-changing film according to temperature can stimulate children's curiosity and help to enjoy the gargle.

The sheath 120 is in the form of a triangular pipe surrounding the outer periphery 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 made of a polyester resin, and more preferably polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and polycyclohexanedimethylene terephthalate. For example, when the filament 100 is made of one or more selected from the above-mentioned copolymers, the strength of the filament 100 can be effectively improved.

On the other hand, when the sheath 120 located outside the filament 100 is a rigid resin, the cleaning force of the core 110 including the elastic resin may be deteriorated. In this case, the strength of the filament 100 There is a fear that the gums may be damaged due to 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, it is preferable that at least a part of the core 110 is exposed to the outside.

As described above, the dual structure filament 100 according to this embodiment has a structure in which at least a part of the core 110 is exposed to the outside of the sheath 120 so that the core 110 has high strength and durability but has flexibility and elasticity 1 to 4, at least the structures of the core 110 and the filament 100 may exist in various ways, which will be described in detail with reference to the 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 is relatively thicker than the core 110, and a pipe shape.

The core 110 extends through the center of the sheath 120 and extends in the longitudinal direction and has a reverse cross section corresponding to the inside of the sheath 120. The corners 111 of the core 110 are connected to the sheath 120 ) To the outside and exposed to the outside.

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

Since the filament 100 includes the sheath 120, the filament 100 has a strength lower than the reference value, thereby preventing the gum from being damaged when gargling.

In addition, since the edge 112 of the core 110 exposed to the outside of the sheath 120 has a predetermined coefficient of friction, it is possible to effectively remove the plaque upon contact with the teeth.

The core 110 has various shapes, and a description thereof will be described with reference to FIG.

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

As shown in the figure, the core 110 is embedded in the center of the sheath 120, and the corners 111 may be exposed to the outside or protrude from the outside of the sheath 120 as in the respective embodiments.

2A shows a state in which the corners 111 of the core 110 are exposed to the outside of the sheath 120 and is exposed to the outside of the sheath 120. This is a basic embodiment of the present invention.

FIG. 2B shows the corners 111 of the core 110 protruding from the outer surface of the sheath 120, which is another embodiment of the core 110, which effectively removes the plaque upon contact with the teeth. That is, since the edge 111 protruding from the outer surface of the sheath 120 has a predetermined coefficient of friction, plaque can be effectively removed.

2C shows a modified example of the edge 111 protruding outward from the sheath 120. As shown in the figure, the edge 111 is a rubbing protrusion 113 protruding outside the sheath 120 and partially surrounding the sheath 120 Can exist.

Since the friction protrusion 113 has a predetermined coefficient of friction, it can effectively remove the plaque when it comes into contact with the teeth. In particular, since the friction protrusion 113 has a curved surface and covers at least a part of the side surface of the sheath 120, The area of contact with the teeth is wide, so that the plaque can be more effectively removed. At this time, a plurality of irregularities may be further formed on the outer circumferential surface of the rubbing protrusion 113.

Although the core 110 is not shown, the core 110 may be recessed from the sheath 120 or protruded as shown in FIGS. 3 and 4, and a description thereof will be made with reference to the drawings.

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

The core 110 may protrude from the sheath 120 as shown in FIG. The core 110 may be formed by using a core 110 having a length greater than that of the sheath 120 so as to be protruded from the end of the sheath 120 or by sharpening one or both sides So that the core 110 can be protruded to the outside.

Here, a chemical processing method is used. For example, one end or both ends of the filament 100 may be immersed in an alkali or an acid solution, respectively, and processed as shown in FIGS. 3A and 3B.

In FIG. 3A, the core 110 protrudes from the sheath 120. At this time, although not shown in the end portion of the sheath 120, irregularities may be formed to improve detergency when brushing teeth.

FIG. 3B is a perspective view of the end of the core 110. As shown in FIG. 3B, since the core 110 having a predetermined coefficient of friction is exposed upwardly, the plaque can be effectively removed upon contact with the teeth, , So that it is easier to remove foreign matter remaining on the gums.

On the other hand, the filament 100 may have a shape in which at least both ends are twisted as shown in Fig.

The twisting of the filament 100 is performed by machining or molding. This twisting enhances the strength and elasticity of the filament 100, doubling the durability as a bristle, and more particularly, the restoring force is excellent, .

For example, the filament 100 may have a shape in which both ends are twisted in a state in which no processing is applied as shown in FIG. 4A, or a state in which both ends are twisted in a state where the end of the filament 100 is processed as shown in FIGS. .

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

Therefore, not only excellent resilience is achieved in repetitive exercise, but also minimizes damage caused thereby, so that it is possible to prevent the deterioration of the function and to use the toothbrush for a long period of time, thereby minimizing the economic loss due to toothbrush replacement.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. 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.

100: filament, 110: core,
111: corner, 113: friction protrusion,
120: sheath, 121: outskirts

Claims

A core in the form of a triangular bar; And
And a sheath in which the core is embedded in the central portion,
The sheath is in the form of a reverse osmosis pipe having the core embedded therein
The core further includes a friction protrusion formed on an edge of the sheath, the edge of the core exposed to the outside through the outer surface of the sheath, and the core having a predetermined coefficient of friction and surrounding a part of the sheath outside, Wherein the friction protrusions are curved and extend along the corners, and a plurality of protrusions and protrusions are formed on the outer circumference of the filament.

delete

The method according to claim 1,
The filament
Wherein at least the ends of the sheath of the sheath and the core are sharply formed.

6. The method of claim 5,
The filament
A double structure filament characterized in that at least one selected end of the sheath and core is twisted in the longitudinal direction,

7. The method according to any one of claims 1 to 6,
Wherein the core and the sheath
Wherein the filament has a double structure.

8. The method of claim 7,
The core comprises:
Wherein the filament is one or more selected from the group consisting of an ethylene /? - olefin elastomer, a propylene /? - olefin elastomer, a thermoplastic olefin elastomer, a thermoplastic styrene elastomer, a urethane thermoplastic elastomer or a mixture thereof.

8. The method of claim 7,
The core comprises:
Wherein the fiber is one selected from polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA) and polybutylene succinate (PBS).

8. The method of claim 7,
The core comprises:
Wherein the filament is a silicone or a silicone compound.

8. The method of claim 7,
The sheath
Wherein the filament is one or more selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polycyclohexanedimethylene terephthalate, and copolymers thereof.