KR101826720B1

KR101826720B1 - Dual structure filament

Info

Publication number: KR101826720B1
Application number: KR1020160028312A
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: KR20170105288A; WO2017155253A1

Abstract

The present invention relates to a bar-shaped core; And a sheath in which the core is embedded in the central portion; The core includes a central portion having a circular rod shape. And at least one wing formed radially outwardly of the central portion.
The present invention is a filament comprising cores and sheaths made of different materials. The filament has high strength and durability as well as excellent flexibility and elasticity, thereby reducing gum irritation and damage caused by brushing teeth, and doubling the effect of tooth brushing.

Description

Dual structure filament < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to filaments used as bristles, and more particularly, to a filament having a double structure in which core constituting the core of the filament and sheath constituting the 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.

According to an aspect of the present invention, there is provided a semiconductor device comprising: a core; And a sheath in which the core is embedded in the central portion; The core includes a central portion having a circular rod shape. And at least one wing formed radially outwardly of the central portion.

The wings are preferably exposed to the outside through the outer surface of the sheath.

The core may further include a friction protrusion formed on the blade end and protruding from the sheath.

It is preferable that the friction protrusion has a curved outer surface and is formed to extend along the sheath.

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

Preferably, the vanes are radially disposed in the form of a spiral along the longitudinal direction of the center portion.

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

Wherein the sheath is a bar selected from the group consisting of a circular shape and a polygonal shape. When the sheath is circular, the sheath ratio of the sheath has a ratio of 1: 1 to 5, : 1 to 5 is preferable.

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.

The filament comprising the core and the sheath of different materials according to the present invention has high strength and durability as well as excellent flexibility and elasticity so as to 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.

1 is a perspective view illustrating a filament according to a preferred embodiment of the present invention,
2 is a plan view for explaining an example of a coil according to a preferred embodiment of the present invention,
3 is a plan view for explaining an example of a sheath according to a preferred embodiment of the present invention,
FIG. 4 is a perspective view illustrating an example of filament according to one preferred embodiment of the present invention, and FIG.
5 is a perspective view illustrating 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 intended to prevent the gums from being damaged when the bristles are imparted with flexibility and elasticity at the center of the filament 100 for brushing.

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, a detergency improving agent may be further added to the core 110. 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.

The sheath 120 surrounds the outer surface 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 5, at least the core 110 and the filament 100 may have various structures, which will be described in detail with reference to the drawings.

As shown in FIG. 1, the filament 100 includes a core 110 for imparting flexibility and elasticity to the filament 100 at a central portion thereof, and a sheath 120 for enhancing strength at the periphery thereof to improve durability. do.

The core 110 includes a center portion 111 which is embedded in the center portion of the sheath 120 and forms a circular bar shape and a wing 113 formed radially outwardly of the center portion 111. The wing 113 End portion extends to the outer peripheral surface of the sheath 120 and is exposed to the outside.

The core 110 has a predetermined ratio with the sheath 120, thereby maximizing the effect of toothbrushing. The description will be made with reference to FIG.

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

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

When the diameter ratio between the core 110 and the sheath 120 is less than 1: 1, there is a possibility that the gum may be damaged due to high strength. When the diameter ratio of the core 110 and the sheath 120 exceeds 1: 5, The deterioration of the cleaning ability is a concern.

Therefore, it is preferable that the filament 100 has a diameter ratio of the core 110 and the sheath 120 of 1: 1 to 5, which allows the filament 100 to have an optimum strength and elasticity It is maintained.

It is preferable that the diameter of the core 110 and the length ratio D1 to L of the vanes 113 are 1: 1 to 5 because the vanes 113 extend to the outer circumferential surface of the sheath 120, ), But not to protrude more than that.

However, in one embodiment of the present invention, at least the length of the wings 113 can be longer than the length D1, and the synergistic effect can be derived, as shown in FIGS. 2B and 2C Will be described with reference to FIG.

2B is a view for explaining an example of the wing 113. The wing 113 is formed longer than D2 as shown in FIG.

Since the wing 113 protruding out of the sheath 120 has a predetermined coefficient of friction, it is possible to effectively remove the plaque on contact with the teeth, thereby providing a cool feeling due to brushing and an advantage .

The wing 113 may further include a friction protrusion 115 at an end thereof protruding as shown in FIG. 2C. The friction protrusion 115 has a curved outer surface and is formed to surround a portion of the outer circumference along the longitudinal direction of the sheath 120.

The friction protrusion 115 enlarges the contact area with teeth and raises the coefficient of friction to enable efficient removal of plaque. At this time, though not shown in the outer periphery of the rubbing protrusion 115, many irregularities may be formed, which may double the friction coefficient and the plaque removal efficiency.

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

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

As shown, the sheath 120 surrounds the core 110 and is not limited to a shape. Therefore, as shown in FIG. 2, not only a circle but also a triangle as shown in FIG. 3A, a rectangle as shown in FIG. 3B, and a pentangle as shown in FIG.

At this time, the number of the wings 113 may be limited according to the shape of the sheath 120 as shown in the figure. That is, in the case of a triangle, it is preferable that three wings are radially arranged with respect to the center portion 111 so as to correspond to the center orthogonal to each side.

However, when the sheath 120 is circular as shown in FIG. 2, the number of the wings 113 is not limited to a figure but may be arranged in a daily fashion. In particular, when the sheath 120 is circular, To 10).

Although not shown, the core 110 may be recessed more than the sheath 120, or protruded as shown in FIGS. 4 and 5, and a description thereof will be made with reference to the drawings.

4 is a perspective view illustrating an example of a filament according to an exemplary 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 at least one side The core 110 may protrude outward.

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. 4A and 4B.

4A, the core 110 protrudes from the sheath 120. At this time, although not shown at the end of the sheath 120, irregularities may be formed to improve cleaning power when brushing the teeth.

FIG. 4B shows a state in which the core 110 having a predetermined coefficient of friction is exposed at the top, so that the plaque can be effectively removed when the tooth is brought into 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 thereof 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 of the bristles, and particularly, the restoring force is excellent, thereby maximizing the effect on the brushing.

It is preferable that the twist is generated or generated in at least one of the core 110 and the sheath 120 and at least the wings are arranged in the form of a spiral along the longitudinal direction of the central portion 111, (113) may be twisted in the form of a spiral.

For example, the filament 100 may have a shape in which at least one end of at least one of the sheath 120 and the core 110 is twisted in the longitudinal direction in a state where the end portion is not machined as shown in FIG. 5A, (113) can be arranged in the form of a spiral.

In addition, the filament 100 may be formed so as to have a twisted shape between both ends in a state where the ends are processed (sharply) as shown in FIG. 5B, or the sharpened wings 113 may be arranged in the form of a spiral.

Here, the machining can be machined such that the corner area (the boundary between the plane and the side) is curved as well as the sharp machining as shown, and it is preferable that the machining is selectively performed in accordance with the brushing effect.

As described above, since the strength and elasticity are reinforced only by having the shape in which the both ends of the filament 100 are twisted, not only the restoring force is excellent even in the repetitive motion, but also the deterioration is minimized, It is possible to use the toothbrush for a long time so that the economic loss due to toothbrush replacement can be minimized.

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: center, 113: wing,
115: friction protrusion, 120: sheath,

Claims

A core in the form of a bar;
And a sheath in which the core is embedded in the central portion;
The core includes a central portion having a circular rod shape. And at least one wing radially formed on the outer periphery of the central portion,
The wing
And is exposed to the outside through the outside of the sheath,
The core comprises:
And a friction protrusion formed on the end of the blade and protruding from the sheath and having a curved outer surface and extending along the sheath,
And a plurality of irregularities are formed on an outer periphery of the rubbing protrusion.

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 wing
Wherein the filament is arranged radially in the form of a spiral along the longitudinal direction of the central part.

6. The method of claim 5,
The filament
Wherein a length of at least one of the sheath and the core is twisted in the longitudinal direction.

The method according to claim 1,
The sheath
A bar, a bar, a circle, and a polygon,
Wherein the diameter ratio of the core to the core is 1: 1.1 to 5, and the ratio of the diameter D1 of the core to the length L of the blade is 1: 1 to 5. filament.

9. The method according to any one of claims 1 to 8,
Wherein the core and the sheath
Wherein the filament has a double structure.

10. The method of claim 9,
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.

10. The method of claim 9,
The core comprises:
Wherein the fiber is one selected from polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA) and polybutylene succinate (PBS).

10. The method of claim 9,
The core comprises:
Wherein the filament is a silicone or a silicone compound.

10. The method of claim 9,
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.