KR20170049679A - Dual structure filament - Google Patents

Dual structure filament Download PDF

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Publication number
KR20170049679A
KR20170049679A KR1020150149376A KR20150149376A KR20170049679A KR 20170049679 A KR20170049679 A KR 20170049679A KR 1020150149376 A KR1020150149376 A KR 1020150149376A KR 20150149376 A KR20150149376 A KR 20150149376A KR 20170049679 A KR20170049679 A KR 20170049679A
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KR
South Korea
Prior art keywords
core
sheath
filament
elastomer
present
Prior art date
Application number
KR1020150149376A
Other languages
Korean (ko)
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KR101882179B1 (en
Inventor
강기태
김성진
황소희
Original Assignee
비비씨 주식회사
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Priority to KR1020150149376A priority Critical patent/KR101882179B1/en
Publication of KR20170049679A publication Critical patent/KR20170049679A/en
Application granted granted Critical
Publication of KR101882179B1 publication Critical patent/KR101882179B1/en

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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0207—Bristles characterised by the choice of material, e.g. metal
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0292—Bristles having split ends
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Multicomponent Fibers (AREA)
  • Brushes (AREA)

Abstract

The present invention relates to a dual structure filament made of a core and a sheath of different materials so as to have high strength and durability and to have flexibility and elasticity, and includes a core extending in one direction and a sheath surrounding the core . The core comprises a central portion passing through the center of the sheath and a wing extending outward from the central portion. The wing portion extends to the edge of the sheath so as to be exposed to the outside of the filament, and is formed of a plurality of radially arranged portions with respect to the center portion. The present invention having the above-described structure is made of a double structure in which a sheath including rigid resin surrounds a core including an elastic resin, so that it has high strength, excellent durability, and flexibility and elasticity. Therefore, it is possible to effectively remove plaque without irritating the gums when gargling, and to provide a refreshing sensation of chewing gum.

Description

{DUAL STRUCTURE FILAMENT}

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a filament used as a bristle, and more particularly, to a dual structure filament made of a core and a sheath 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)

It is an object of the present invention to provide a dual structure filament comprising a core and a sheath of different materials so as to have high strength and excellent durability and flexibility and elasticity.

According to an aspect of the present invention, there is provided a dual structure filament comprising a core extending in one direction and a sheath surrounding the core.

The core comprises a central portion passing through the center of the sheath and a wing extending outward from the central portion. At this time, the wings may extend to the edge of the sheath so as to be exposed to the outside of the filament, and may be plurally arranged radially with respect to the center.

The core may further include a friction protrusion formed at an end of the wing portion and projecting to the outside of the sheath. The friction protrusion may be formed to surround a portion of an edge of the sheath.

On the other hand, the core may be a selected one of an elastic resin and a biodegradable resin, and the sheath may be a rigid resin.

The core may be one or more kinds of elastic resins selected from 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 may be one biodegradable resin selected from polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA), and polybutylene succinate (PBS).

The sheath may be one or more rigid resins selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polycyclohexanedimethylene terephthalate, and copolymers thereof.

In the present invention constructed as described above, the sheath including the rigid resin is made of a double structure which surrounds the core including the elastic resin, so that it has high strength, excellent durability, and has a certain flexibility and elasticity. Therefore, it is possible to effectively remove plaque without irritating the gums when gargling, and to provide a refreshing sensation of chewing gum.

1 is a perspective view of a dual structure filament according to one embodiment of the present invention.
2 is a plan view of a dual structure filament according to one embodiment of the present invention.
FIGS. 3 to 6 show a modification of a dual structure filament according to an embodiment of the present invention. FIG.
7 to 9 show another modification of the dual structure filament according to an embodiment of the present invention.
10 is a perspective view of a dual structure filament according to another embodiment of the present invention.
11 is a plan view of a dual structure filament according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, embodiments of the present invention will be described in detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the filament 100 according to an embodiment of the present invention includes a filament 100 having a double structure including a core 110 extending in one direction and a sheath 120 surrounding the core 110 to be.

The core 110 located inside the filament 100 is provided for imparting flexibility and elasticity to the filament 100 to prevent damage to the gums when brushing the teeth. The sheath 120 located outside the filament 100 enhances the strength of the filament 100 to improve the durability of the bristles.

The material of the core 110 and the sheath 120 will be described below.

Any thermoplastic elastomer resin having a predetermined coefficient of friction when the core 110 is manufactured can be used without limitation. 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.

Further, the core 110 may be made of silicon or a silicon compound.

It is preferable to use a polyester resin in the production of the sheath 120, 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.

The dual structure filament 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 that the core 110 has high strength and durability but has flexibility and elasticity.

2, the core 110 extends in one direction and has a thin shaft shape. The sheath 120 surrounds the core 110 and is relatively thicker than the core 110, ) Shape. The core 110 includes a central portion 112 extending in the longitudinal direction and penetrating the center of the sheath 120 and a wing portion 114 extending from the central portion 112 of the core 110 to the outer peripheral surface of the sheath 120 The end of the wing portion 114 extends to the outer circumferential surface of the sheath 120 and is exposed to the outside of the sheath 120.

The diameter ratio D 1 : D 2 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 is greater than 1: 5, There is a fear that the washing power is lowered.

It is preferable that the ratio (D 1 : L) of the diameter of the core 110 to the length of the wing portion 114 is 1: 1 to 5 because the wing portion 114 extends to the outer peripheral surface of the sheath 120 To be exposed to the outside of the sheath 120 but not to protrude further.

Since the filament 100 having the above-described structure includes both the core 110 of the elastic resin and the sheath 120 of the rigid resin, the filament 100 has a strength lower than the reference value, thereby preventing the gums from being damaged do. In particular, since the wing portion 114 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 end portion of the filament 100 according to the present embodiment can be manufactured in various forms.

As shown in FIGS. 3 and 4, the core 110 of the filament 100 may be formed to be recessed from the sheath 120, or the core 110 may protrude from the sheath 120. When the core 110 is depressed or protruded from the sheath 120, irregularities are formed on the end portion of the filament 100 to improve cleaning power when brushing.

As shown in FIGS. 5 and 6, the cross-sectional area of the filament 100 may be reduced toward the end, or the end of the filament 100 may be hemispherically shaped. When the end of the filament 100 is tapered, the core 110 having a predetermined coefficient of friction is exposed to the upper side, so that the plaque can be effectively removed upon contact with the teeth. On the other hand, if the end portion of the filament 100 has a hemispherical shape, it is possible to prevent the gum from being damaged when brushing the tooth.

Here, in order to taper the end portion of the filament 100, a chemical processing method is used. For example, one side or both sides of the filament 100 may be processed into a taper shape by immersing the filament 100 in an alkali or an acidic solution.

The filament 100 according to the present embodiment may have various cross-sectional shapes.

7 to 9, the sheath 120 of the filament 100 may have a circular, triangular, or rectangular cross-section. The core 110 may also include a central portion 112 extending through the center of the sheath 120 and eight wings 114 radially disposed about the central portion 112 (see FIG. 7) .

On the other hand, the core 110 may further contain a detergency improving agent. Although the elastic resin itself has excellent cleaning power, the initial cleaning force can be maintained constantly by including the cleaning power improving agent, and a chewing sensation can be provided with less irritation to the gum.

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, the filament 100 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. The antimicrobial additive may be 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.

Referring to FIGS. 10 and 11, the filament 200 according to another embodiment of the present invention will be described.

The filament 200 according to the present embodiment includes a core 210 extending in one direction and a sheath 220 surrounding the core 210.

The core 210 extends in one direction and has a thin bar shape. The sheath 220 surrounds the core 210 and has a relatively large tubular shape as compared with the core 210. The core 210 has a center portion 212 extending in the longitudinal direction through the center of the sheath 220 and a wing portion 214 extending from the center portion 212 of the core 210 to the outer circumferential surface of the sheath 220. [ And a friction protrusion 216 formed at an end of the wing portion 214 and projecting outward from the sheath 220. [

The filament 200 of the above-described structure can effectively remove plaque upon contact with teeth because the friction protrusion 216 exposed to the outside of the sheath 220 has a predetermined friction coefficient. In particular, since the frictional protrusions 216 have a semicircular cross section and cover at least a part of the outer circumferential surface of the sheath 220, the area of contact with teeth can be increased to more effectively remove the plaque.

As shown in FIG. 11, the friction protrusions 216 of the core 210 may be composed of eight radially arranged with respect to the central portion 212. In addition, a plurality of irregularities may be added to the outer circumferential surface of the friction protrusion 216.

Meanwhile, the filament 200 according to the present embodiment is also formed into a tapered shape in which the core 210 is exposed at an upper portion thereof, that is, the sectional area decreases toward the end portion, so that the plug can be effectively removed.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Those skilled in the art will understand. Therefore, the scope of protection of the present invention should be construed not only in the specific embodiments but also in the scope of claims, and all technical ideas within the scope of the same shall be construed as being included in the scope of the present invention.

100: filament 110: core
112: center portion 114: wing portion
120: CIS

Claims (13)

A core extending in one direction; And
And a sheath surrounding the core,
Wherein the core comprises a central portion passing through the center of the sheath and a wing portion extending outward from the central portion.
The method according to claim 1,
Wherein the wings extend to an edge of the sheath so as to be exposed to the outside of the filament and are arranged radially with respect to the center.
The method of claim 2,
Wherein the core further comprises a friction protrusion formed at an end of the wing portion and projecting to the outside of the sheath.
The method of claim 3,
Wherein the frictional projection is formed to surround a part of an edge of the sheath.
The method of claim 4,
And a tapered shape in which the cross-sectional area decreases toward the end portion.
The method according to any one of claims 1 to 5,
Wherein the sheath has a circular or polygonal cross-section.
The method of claim 6,
Wherein the core is formed in a circular cross section, the sheath is formed into a circular cross section with a larger diameter than the core,
Wherein the core and the sheath have a diameter ratio of 1: 1 to 5.
The method of claim 7,
Wherein the ratio of the diameter of the core to the length of the wing portion is 1: 1 to 5.
The method according to any one of claims 1 to 5,
Wherein the core and the sheath are made of different materials.
The method of claim 9,
Wherein 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, filament.
The method of claim 9,
Wherein the core is silicon or a silicon compound.
The method of claim 9,
Wherein the core is one selected from the group consisting of polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA), and polybutylene succinate (PBS).
The method of claim 9,
Wherein the sheath is at least one member selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polycyclohexanedimethylene terephthalate, and copolymers thereof.
KR1020150149376A 2015-10-27 2015-10-27 Dual structure filament KR101882179B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019039784A1 (en) * 2017-08-24 2019-02-28 비비씨 주식회사 Polyketone toothbrush bristles and toothbrush using same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100271580B1 (en) 1998-08-13 2000-11-15 김경훈 A toothbrush having bristles made up of silicon and nylon
JP2004502481A (en) * 2000-07-10 2004-01-29 コロネット−ベルケ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング Method and apparatus for manufacturing brush products and brush products
JP2010082094A (en) * 2008-09-30 2010-04-15 Sunstar Inc Toothbrush filament and toothbrush provided with the same
KR20100039188A (en) * 2008-10-07 2010-04-15 (주)알엔디지케이알 Toothbrush bristle and toothbrush having the same
KR20130128960A (en) * 2012-05-18 2013-11-27 비비씨 주식회사 Dual structure filamaent and toothbrush using thereof
KR20130129024A (en) * 2012-05-18 2013-11-27 비비씨 주식회사 Dual structure filamaent and toothbrush using thereof
KR20150060661A (en) * 2012-09-25 2015-06-03 라이온 가부시키가이샤 Tapered bristles, method for manufacturing same, and toothbrush provided with tapered bristles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100271580B1 (en) 1998-08-13 2000-11-15 김경훈 A toothbrush having bristles made up of silicon and nylon
JP2004502481A (en) * 2000-07-10 2004-01-29 コロネット−ベルケ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング Method and apparatus for manufacturing brush products and brush products
JP2010082094A (en) * 2008-09-30 2010-04-15 Sunstar Inc Toothbrush filament and toothbrush provided with the same
KR20100039188A (en) * 2008-10-07 2010-04-15 (주)알엔디지케이알 Toothbrush bristle and toothbrush having the same
KR20130128960A (en) * 2012-05-18 2013-11-27 비비씨 주식회사 Dual structure filamaent and toothbrush using thereof
KR20130129024A (en) * 2012-05-18 2013-11-27 비비씨 주식회사 Dual structure filamaent and toothbrush using thereof
KR20150060661A (en) * 2012-09-25 2015-06-03 라이온 가부시키가이샤 Tapered bristles, method for manufacturing same, and toothbrush provided with tapered bristles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019039784A1 (en) * 2017-08-24 2019-02-28 비비씨 주식회사 Polyketone toothbrush bristles and toothbrush using same

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