KR101874948B1

KR101874948B1 - Dual structure filament

Info

Publication number: KR101874948B1
Application number: KR1020160028314A
Authority: KR
Inventors: 강기태; 김성진; 황소희
Original assignee: 비비씨 주식회사
Priority date: 2016-03-09
Filing date: 2016-03-09
Publication date: 2018-07-10
Also published as: WO2017155254A1; KR20170105289A

Abstract

The present invention relates to a semiconductor device, which comprises a core in the form of a bar; And a sheath in which the core is embedded at the center, wherein the core is a circular bar radially disposed at the center of the sheath.
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.

According to an aspect of the present invention, there is provided a semiconductor device comprising: a core in the form of a bar; And a sheath in which the core is embedded at the center, wherein the core is a circular bar radially disposed at the center of the sheath.

The core is preferably exposed to the outside through the longitudinal end of the sheath.

The core is preferably protruded from the sheath.

Preferably, the sheath has a sharp edge so that an end of the core is exposed to the outside.

The core has a spiral shape along the longitudinal direction and is preferably disposed radially with respect to the center of the sheath.

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.

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 detailed view for explaining another example of the core according to the 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 in the form of a solid bar so as to prevent the gums from being damaged when the filament 100 is imparted with flexibility 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 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 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 filament may include a core in the form of a bar having a predetermined length as a bristle, and a sheath having a core in the center thereof.

At least one bar extending in one direction is disposed radially with respect to the center of the sheath 120 and the sheath 120 is a bar in which the core 110 is embedded. , A circular bar corresponding to the length of the core 110 as shown.

The core 110 is disposed radially with respect to the center of the sheath 120, and is preferably four as shown in the figure, but the present invention is not limited thereto, and the thickness and the number of the cores 110 can be selectively arranged in accordance with the strength and the elasticity.

In addition, the core 110 may have various shapes as shown in FIG. 2, and may include a rectangular bar as shown in FIG. 2A, a quadrilateral as shown in FIG. 2B, and a pentagonal bar as shown in FIG. 2C .

The core 110 may be flush with the plane of the sheath 120 or may be recessed as shown in FIG. 3A or protruded as shown in FIG. 3B, Or may be exposed.

At this time, it is preferable that the sheath 120 is a circular bar shape as shown in the drawing, but it is not limited thereto, and it may be various shapes (for example, polygons and the like) as well as a circular bar.

On the other hand, the filament 100 may be formed with sharp ends through specific processing, and a description thereof will be described with reference to FIG.

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

As shown in the drawing, any one selected from the sheath 120 and the core 110 is sharpened by machining, thereby improving the efficiency of brushing the teeth. That is, by sharpening the end portions, it is possible to facilitate separation of the foreign substances remaining in the gums as well as between the teeth.

Here, a chemical processing method is used. For example, one end or both ends of the filament are immersed in an alkali or an acidic solution, respectively, and processed as shown in FIGS. 4A and 4B.

4A is a side view of the core 110. In FIG. 4A, the shape and length of the core 110 are sharpened by cutting the sheath 120. At this time, not shown in the end of the core 110 for improving the cleaning ability.

FIG. 4B is a cross-sectional view of the core 110 and the sheath 120 taken together to sharpen the ends of the filament 100. FIG. Therefore, penetration into a narrow space is facilitated, so that not only plaque can be more effectively removed, but particularly, it is made easier to remove foreign matter remaining between teeth and 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 core 110 is arranged in the form of a spiral along the longitudinal direction of the sheath 120, The core 110 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 the sheath 120 and at least one of the cores 110 is twisted in the longitudinal direction in a state in which no end portion is machined as shown in FIG. 5A, (110) may be arranged in the form of a spiral.

In addition, the filament 100 may have a twisted shape between both ends in a state where the ends are processed (sharply) as shown in FIG. 5B, or the sharpened core 110 may be arranged in the form of a spiral.

Here, the processing may be machining so as to bend the edge region (plane-side boundary) as well as sharp processing as shown, and it is preferable that the processing is selectively performed according to 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,
120: sheath

Claims

A core in the form of a bar; And
And a sheath in which the core is embedded in the central portion,
The core has a circular shape having a spiral shape along the longitudinal direction and radially disposed at the center of the sheath,
Wherein the core is flush with the plane of the sheath and is exposed to the outside through a longitudinal end of the sheath, the core being protruded from the sheath end, the end of the core being formed with irregularities, Wherein the end of the core is exposed to the outside, and at least one selected end of the sheath and the core is twisted in the longitudinal direction.

delete

The method according to claim 1,
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.