WO2017104786A1 - Instrument de nettoyage interdentaire - Google Patents

Instrument de nettoyage interdentaire Download PDF

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Publication number
WO2017104786A1
WO2017104786A1 PCT/JP2016/087490 JP2016087490W WO2017104786A1 WO 2017104786 A1 WO2017104786 A1 WO 2017104786A1 JP 2016087490 W JP2016087490 W JP 2016087490W WO 2017104786 A1 WO2017104786 A1 WO 2017104786A1
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WO
WIPO (PCT)
Prior art keywords
reinforcing material
cleaning tool
interdental cleaning
weight
shaft portion
Prior art date
Application number
PCT/JP2016/087490
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English (en)
Japanese (ja)
Inventor
侑 吉川
成知 白木
小宮山　悟
昇 日下部
慎治 猶明
正徳 川上
Original Assignee
小林製薬株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 小林製薬株式会社 filed Critical 小林製薬株式会社
Publication of WO2017104786A1 publication Critical patent/WO2017104786A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C15/00—Devices for cleaning between the teeth
    • A61C15/02—Toothpicks

Definitions

  • the present invention relates to an interdental cleaning tool.
  • Patent Document 1 discloses an interdental cleaning tool including a base portion having a shape extending in a specific direction and a cleaning portion made of an elastomer.
  • the base portion includes a shaft portion having a shape that can be inserted between teeth and a grip portion having a shape that can be gripped by a finger.
  • the cleaning part has a shape that covers a part (including the tip part) of the outer peripheral surface of the shaft part.
  • the base is formed of a composite material (a material obtained by adding a fibrous reinforcement to a synthetic resin) including a synthetic resin (polypropylene or the like) and a fibrous reinforcement such as glass fiber.
  • the fibrous reinforcing material is added to increase the strength of the shaft portion (particularly the buckling load).
  • the fibrous reinforcing material is oriented so that the longitudinal direction of the reinforcing material coincides with the axial direction of the shaft portion. Specifically, the fibrous reinforcing material is filled in the mold having a space corresponding to the base portion along the axial direction of the shaft portion, so that the longitudinal direction of the reinforcing material is the axial direction of the shaft portion. Oriented to match. This orientation of the fibrous reinforcement contributes to an improvement in the buckling load of the shaft portion.
  • the shaft portion is relatively easily broken when a bending load is applied to the shaft portion.
  • An object of the present invention is to provide an interdental cleaning tool capable of suppressing breakage of a shaft portion.
  • the present inventors have found that the shaft part exhibits strong anisotropy due to the orientation of the fibrous reinforcing material, and that the shaft part is easily broken. I found it. Specifically, since the reinforcing material is oriented so that the longitudinal direction of the fibrous reinforcing material coincides with the axial direction of the shaft portion, the buckling load of the shaft portion is greatly increased while the shaft portion is When a bending load in the direction of bending the portion is applied, the shaft portion is easily broken.
  • an interdental cleaning tool includes a base portion having a shaft portion having a shape that can be inserted between teeth, and the base portion includes a composite resin and a reinforcing material.
  • the reinforcing material includes at least one non-fibrous reinforcing material selected from a non-fibrous reinforcing material group including a needle-shaped reinforcing material, a plate-like reinforcing material, and a granular reinforcing material.
  • FIG. 1 shows an interdental cleaning tool group having a plurality (three in FIG. 1) of interdental cleaning tools 1.
  • the interdental cleaning tool 1 includes a base portion 10 and a cleaning portion 40.
  • the base portion 10 includes a shaft portion 20 and a grip portion 30.
  • the shaft portion 20 has a shape that extends linearly along a specific direction (vertical direction in FIG. 1) and can be inserted between teeth.
  • the shaft portion 20 has a proximal end portion 20a connected to the grip portion 30 and a distal end portion that is an end portion on the side inserted between the teeth.
  • the shaft portion 20 is formed in a cylindrical shape whose outer diameter gradually decreases from the base end portion 20a toward the insertion end portion.
  • the grip portion 30 extends from the base end portion 20a of the shaft portion 20 so as to be separated from the shaft portion 20 along the axial direction of the shaft portion 20, and has a flat shape that can be gripped by a finger.
  • the gripping portions 30 adjacent to each other are connected by a pair of connecting portions 32.
  • Each connecting portion 32 is preferably thinner than the grip portion 30.
  • each connection part 32 is a shape which becomes thin gradually as it goes to the direction which mutually approaches. If it does in this way, it will be easy to cut off with connecting part 32, and it will be suppressed that it is cut off with connecting part 32 by the impact at the time of transportation.
  • the boundary between the connecting portion 32 and the grip portion 30 located on one side of the connecting portion 32 is thinner than the boundary between the connecting portion 32 and the grip portion 30 located on the other side of the connecting portion 32. .
  • the base 10 is formed of a composite material including a synthetic resin, a reinforcing material, and a low-hardness resin having a hardness lower than that of the synthetic resin.
  • thermoplastic resins such as polypropylene, polyethylene, ABS, polybutylene terephthalate, polycarbonate, polyethylene terephthalate, polystyrene, and polyacetal are preferably used. From the viewpoint of increasing the buckling strength of the shaft portion 20 and ensuring flexibility, it is preferable to use polypropylene as the synthetic resin, and it is more preferable to use homopolymer polypropylene among the polypropylene. In this embodiment, homopolymer polypropylene is used as the synthetic resin.
  • the reinforcing material includes at least one non-fibrous reinforcing material selected from a non-fibrous reinforcing material group consisting of a needle-shaped reinforcing material, a plate-shaped reinforcing material, and a granular reinforcing material.
  • the length of the acicular reinforcing material (longest dimension) is usually 20 ⁇ m to 90 ⁇ m when included in the synthetic resin.
  • the length of the plate-like reinforcing material is usually 10 ⁇ m to 150 ⁇ m when included in the synthetic resin.
  • the length of the granular reinforcing material is usually 5 ⁇ m to 40 ⁇ m when included in the synthetic resin.
  • Wollastonite is preferably used as the acicular reinforcement.
  • the plate-like reinforcing material mica or scaly glass is preferably used.
  • the length of the fibrous reinforcing material such as glass fiber is usually 50 ⁇ m to 450 ⁇ m when included in the synthetic resin.
  • the non-fiber reinforcing material is preferably processed from at least one of a coupling agent and an adhesive from the viewpoint of increasing the buckling strength of the shaft portion 20 and ensuring flexibility. It is more preferable to treat with both adhesives, and such treatment is particularly preferred when using scaly glass.
  • the coupling agent include a silane coupling agent, a titanium coupling agent, an aluminum coupling agent, and a zirconia coupling agent.
  • the adhesive include a vinyl acetate resin and an acrylic.
  • Examples thereof include resins, polyester resins, polyether resins, phenoxy resins, polyamide resins, epoxy resins, polyolefin resins, methyl cellulose, carboxymethyl cellulose, starch, carboxymethyl starch, hydroxyethyl cellulose, hydroxypropyl cellulose, and polyvinyl alcohol.
  • the content of the non-fibrous reinforcing material in the composite material is usually set to 10% by weight or more and 60% by weight or less from the viewpoint of obtaining good buckling strength and flexibility.
  • the content is preferably 10% by weight or more and 45% by weight or less, more preferably 20% by weight or more and 40% by weight or less, and particularly from the viewpoint of excellent flexibility. 20% by weight or more and 30% by weight or less is more preferable.
  • the non-fibrous reinforcement is wollastonite
  • the content is preferably 20% by weight or more and 60% by weight or less, and more preferably 30% by weight or more and 60% by weight or less.
  • the content is preferably 10% by weight or more and 50% by weight or less, more preferably 20% by weight or more and 50% by weight or less, particularly from the viewpoint of excellent flexibility.
  • the weight percentage is more preferably from 40% by weight to 40% by weight, particularly preferably from 20% by weight to 30% by weight.
  • polypropylene such as polypropylene random polymer, polypropylene block polymer and the like, polyethylene such as linear low density polyethylene and low density polyethylene, and styrene elastomer
  • polyethylene such as linear low density polyethylene and low density polyethylene
  • styrene elastomer Elastomers such as olefin elastomers and polyester elastomers and silicones are preferably used, elastomers such as styrene elastomers, olefin elastomers and polyester elastomers, and silicones are more preferably used, and styrene elastomers are more preferably used.
  • a styrene elastomer is used as the low hardness resin.
  • Shore A hardness of the elastomer is preferably 20-50.
  • the hardness should just be smaller than the said synthetic resin used for the said base.
  • the random polymer polypropylene has a lower hardness than the homopolymer polypropylene, and thus becomes a low hardness resin.
  • the content of the low-hardness resin in the composite material is set to 1% by weight or more and 30% by weight or less from the viewpoint that flexibility is obtained while the buckling strength is good. If the content of the low-hardness resin is less than 1% by weight, the flexibility of the shaft part 20 due to the low-hardness resin may not be sufficiently improved, and if it exceeds 30% by weight, There is a possibility that the buckling strength of the shaft portion 20 cannot be sufficiently obtained.
  • This content is preferably 1% by weight or more and 20% by weight or less, more preferably 1% by weight or more and 10% by weight or less, and further preferably 1% by weight or more and 5% by weight or less. . In particular, when the low-hardness resin is an elastomer, the content is preferably 20% by weight or less from the viewpoint that the buckling strength of the shaft portion 20 can be sufficiently secured.
  • the cleaning unit 40 covers the outer peripheral surface of the shaft unit 20 and can clean between the teeth.
  • the cleaning unit 40 includes a cleaning unit main body 42 that covers the outer peripheral surface of the shaft unit 20, and a plurality of brush hairs 44 that protrude from the outer peripheral surface of the cleaning unit main body 42.
  • the cleaning unit 40 is made of an elastomer.
  • the same resin (styrene elastomer) as the low-hardness resin is used as the elastomer. This is preferable because the compatibility between the cleaning unit 40 and the shaft unit 20 is increased.
  • polypropylene is employed as the synthetic resin, the styrene elastomer is preferable because of its excellent compatibility with polypropylene.
  • This manufacturing method includes a kneading step, a base portion forming step, and a cleaning portion forming step.
  • a composite material is formed by kneading a synthetic resin, a non-fibrous reinforcing material, and a low-hardness resin with a kneader.
  • the content of the non-fibrous reinforcing material in the composite material is set to 60% by weight or less, it is kneaded uniformly.
  • a part of wollastonite becomes a granular form from a needle shape by being crushed in the kneading step.
  • the composite material is filled into a base forming mold (not shown) having a space corresponding to the base 10 from the side corresponding to the grip portion 30 toward the side corresponding to the shaft portion 20.
  • the base 10 is formed.
  • the non-fibrous reinforcing material added to the synthetic resin is selected from the non-fibrous reinforcing material group, the gate trace of the base portion 10 is suppressed from being sharp. For this reason, the irritation
  • the cleaning portion is filled by filling the same resin (elastomer) as the low-hardness resin in a cleaning portion forming mold (not shown) having a space in which the cleaning portion 40 can be formed around the shaft portion 20. 40 is formed.
  • the interdental cleaning tool 1 is inserted between the teeth with the tip of the shaft portion 20 as the head. And the holding part 30 is operated so that the cleaning part 40 reciprocates along between teeth. At this time, although a bending load may act on the shaft part 20, since the shaft part 20 is supple in the interdental cleaning tool 1 of the present embodiment, the bending of the shaft part 20 is suppressed.
  • the reinforcing material added to the synthetic resin is a non-fibrous reinforcing material (acicular reinforcing material, plate) shorter than the length (longest dimension) of the fibrous reinforcing material.
  • the anisotropy of the shaft portion 20 is smaller than that in the case of including a fibrous reinforcing material as the reinforcing material. Therefore, the flexibility of the shaft portion 20 is ensured while the buckling strength of the shaft portion 20 is maintained. More specifically, since the length of the non-fibrous reinforcing material included in the non-fibrous reinforcing material group is shorter than the fibrous reinforcing material, it is suppressed that the reinforcing material acts as a resistance against bending of the shaft portion 20. Is done. For this reason, since the flexibility derived from a synthetic resin is ensured, the bending of the axial part 20 is suppressed.
  • the content of the non-fibrous reinforcing material in the composite material is 10% by weight or more and 60% by weight or less, the maintenance of the buckling strength of the shaft part 20 and the securing of the flexibility are more reliably achieved. Specifically, when the content of the non-fibrous reinforcing material is 10% by weight or more, the buckling strength of the shaft portion 20 is maintained. And when content of a non-fibrous reinforcement is 60 weight% or less, it is suppressed that a reinforcement acts as resistance with respect to the bending of the axial part 20, and the flexibility of the axial part 20 is ensured. .
  • the composite material includes a low hardness resin having a hardness lower than that of the synthetic resin. Therefore, since the shaft part 20 becomes more flexible, damage to the shaft part 20 is more reliably suppressed.
  • the content of the low-hardness resin in the composite material is 1% by weight or more and 30% by weight or less, ensuring the flexibility of the shaft portion 20 and ensuring the effective buckling strength can be achieved more reliably. Is done.
  • the elastomer forming the cleaning portion 40 is the same resin as the low-hardness resin. For this reason, since the compatibility of the cleaning part 40 which consists of elastomers, and the axial part 20 increases, peeling from the axial part 20 of the cleaning part 40 is suppressed.
  • the low-hardness resin contained in the composite material and the elastomer forming the cleaning portion 40 may be different from each other. Moreover, at least one of the addition of the low-hardness resin to the synthetic resin and the cleaning unit 40 may be omitted.
  • the shaft portion 20 may have a curved shape. Further, the grip portion 30 may be omitted. Moreover, as FIG.10 and FIG.11 shows, the shape of the base 10 can be changed suitably.
  • the composition of each example and each comparative example is as shown in FIG.
  • the unit of the synthetic resin, the reinforcing material, and the low-hardness resin (elastomer) shown in each table is% by weight.
  • Scale glass is from Nippon Sheet Glass Co., Ltd.
  • Wollastonite is from Kansai Matec Co., Ltd., Keiwa Furnace Co., Ltd., Maruto Co., Ltd.
  • Mica is from Okabe Mica Industry Co., Ltd., Osaka Mica Co., Ltd.
  • FIG. 6 also shows four test results for these examples and comparative examples: (1) suppleness of the shaft 20, (2) buckling strength (buckling load) of the shaft 20, ( 3) Gate traces and (4) Ease of separation are shown.
  • test method and test result of each test will be described.
  • FIG. 4 and 5 show the test results.
  • 4 is a graph showing the test results of Example 11
  • FIG. 5 is a graph showing the test results of Comparative Example 3.
  • Example 11 the pressing force F of the pressing tool 60 gradually changes after the maximum pressing force Fmax, which is the maximum value of the pressing force F during measurement, while in Comparative Example 3, the pressing force F It can be seen that the pressing force F of the tool 60 rapidly decreases after the maximum pressing force Fmax (the shaft portion 20 is broken).
  • the pressing force F was measured by AUTOGRAPH AGS-J 1kN (manufactured by Shimadzu Corporation), and a force gauge attached attachment (manufactured by Imada Co., Ltd./A type S-4) was used as the pressing tool 60. .
  • the suppleness is the maximum pressing force Fmax, the post-displacement pressing force Fa when the pressing tool 60 is further displaced downward by 0.5 mm from the position of the pressing tool 60 when the maximum pressing force Fmax is obtained, and Calculated based on Specifically, the suppleness was calculated based on the following equation.
  • the buckling load is 2.2 N or more, and the cleaning unit 40 can be easily inserted into both the front teeth and the back teeth.
  • the buckling load is 2.0 N or more 2 Less than 2N, and the cleaning unit 40 can be sufficiently inserted into both the teeth between the front teeth and between the back teeth.
  • the buckling load is 1.6N or more and less than 2.0N. Although it is possible to insert the cleaning unit 40 between the teeth of each other, it may be difficult to insert the cleaning unit 40 between the teeth of the back teeth (in addition, “ ⁇ ” does not exist in FIG. 6).
  • X The buckling load is less than 1.6 N, and it is difficult to insert the cleaning unit 40 between both the front teeth and between the back teeth.
  • non-fibrous reinforcing material selected from the group of non-fibrous reinforcing materials consisting of a needle-shaped reinforcing material, a plate-like reinforcing material and a granular reinforcing material as a reinforcing material, good buckling strength It was shown that the interdental cleaning tool which has the axial part 20 excellent in suppleness is ensured, ensuring.
  • the embodiment described above includes an invention having the following configuration.
  • the interdental cleaning tool of this embodiment includes a base portion having a shaft portion having a shape that can be inserted between teeth, and the base portion is formed of a composite material including a synthetic resin and a reinforcing material.
  • the reinforcing material includes at least one non-fibrous reinforcing material selected from a non-fibrous reinforcing material group consisting of a needle-shaped reinforcing material, a plate-like reinforcing material, and a granular reinforcing material.
  • the reinforcing material added to the synthetic resin is a non-fibrous reinforcing material (acicular reinforcing material, plate-like reinforcing material, and granular material) that is shorter than the length (longest dimension) of the fibrous reinforcing material. Therefore, the anisotropy of the shaft portion is smaller than that when the fibrous reinforcing material is included as the reinforcing material. Therefore, the flexibility of the shaft portion is ensured while the buckling strength of the shaft portion is maintained.
  • the length of the non-fibrous reinforcing material included in the non-fibrous reinforcing material group is shorter than the fibrous reinforcing material, it is suppressed that the reinforcing material acts as a resistance against bending of the shaft portion. . For this reason, since the flexibility derived from a synthetic resin is ensured, bending of a shaft part is controlled.
  • Examples of the fibrous reinforcing material include glass fiber, aramid fiber, carbon fiber, cellulose fiber, nanocellulose fiber, vinylon fiber, alumina fiber, and metal fiber.
  • Examples of the acicular reinforcing material include wollastonite, asbestos, potassium titanate, zonotolite, phosphate fiber, dosonite, acicular MgO, aluminum borate, acicular magnesium hydroxide, and the like.
  • Examples of the plate-like reinforcing material include mica, scaly glass, plate-like talc, metal foil, graphite, plate-like calcium carbonate, plate-like aluminum hydroxide, and the like.
  • Examples of the granular reinforcing material include silica, granular calcium carbonate, clay, and glass beads.
  • the content of the non-fibrous reinforcing material in the composite material is preferably 10% by weight or more and 60% by weight or less.
  • the buckling strength of the shaft portion is maintained when the content of the non-fibrous reinforcing material is 10% by weight or more. And when content of a non-fibrous reinforcement is 60 weight% or less, it acts that a reinforcement acts as resistance with respect to the bending of a shaft part, and the flexibility of a shaft part is secured.
  • the non-fibrous reinforcing material group includes mica, wollastonite or scaly glass as the non-fibrous reinforcing material.
  • it contains wollastonite or glass flakes, and more preferably contains glass flakes.
  • the composite material further includes a low-hardness resin having a hardness lower than that of the synthetic resin.
  • the content of the low hardness resin in the composite material is preferably 1% by weight or more and 30% by weight or less.
  • the interdental cleaning tool further includes a cleaning portion that is made of an elastomer, covers the outer peripheral surface of the shaft portion and can clean the interdental space, and the elastomer is the same resin as the low-hardness resin. Is preferred.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
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Abstract

Cette invention concerne un instrument de nettoyage interdentaire (1) comprenant une partie base (10) pourvue d'une partie manche (20) ayant une forme pouvant s'insérer entre les dents. La partie base (10) est formée à partir d'un matériau composite comprenant une résine synthétique et un matériau de renfort. Le matériau de renfort comprend au moins un type de matériau de renfort non fibreux choisi dans le groupe des matériaux de renfort non fibreux constitué par les matériaux de renfort de type aiguille, les matériaux de renfort de type plaque, et les matériaux de renfort de type particule.
PCT/JP2016/087490 2015-12-18 2016-12-16 Instrument de nettoyage interdentaire WO2017104786A1 (fr)

Applications Claiming Priority (2)

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JP2015-247147 2015-12-18
JP2015247147A JP2017108998A (ja) 2015-12-18 2015-12-18 歯間清掃具

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WO2017104786A1 true WO2017104786A1 (fr) 2017-06-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108078152A (zh) * 2017-12-13 2018-05-29 倍加洁集团股份有限公司 一种齿间刷单体、其连接排及生产方法
DE102018002147B3 (de) * 2018-03-16 2019-06-13 Interbros Gmbh Interdentalreiniger

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL270962B2 (en) 2017-06-01 2023-09-01 Sumitomo Chemical Co A heterocyclic compound and a mixture containing it
JP6423050B1 (ja) * 2017-06-28 2018-11-14 小林製薬株式会社 歯間清掃具
JP6423049B1 (ja) * 2017-06-28 2018-11-14 小林製薬株式会社 歯間清掃具
WO2022138817A1 (fr) 2020-12-24 2022-06-30 ライオン株式会社 Brosse interdentaire

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WO2013176297A1 (fr) * 2012-05-24 2013-11-28 サンスター スイス エスエー Procédé de fabrication d'un instrument destiné au nettoyage de l'intervalle entre les dents et instrument destiné au nettoyage de l'intervalle entre les dents
WO2014065368A1 (fr) * 2012-10-24 2014-05-01 サンスター株式会社 Outil de nettoyage interdentaire
WO2015147076A1 (fr) * 2014-03-27 2015-10-01 サンスター スイス エスエー Outil de nettoyage interdentaire et son procédé de fabrication
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JP4097311B2 (ja) * 1997-01-14 2008-06-11 株式会社ジーシーデンタルプロダクツ 歯間ブラシ
JP4916652B2 (ja) * 2004-10-15 2012-04-18 サンメディカル株式会社 歯間ブラシ
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JP2003290251A (ja) * 2002-04-05 2003-10-14 Dentsply Sankin Kk 歯列矯正用ブラケットとその製造方法
WO2013176297A1 (fr) * 2012-05-24 2013-11-28 サンスター スイス エスエー Procédé de fabrication d'un instrument destiné au nettoyage de l'intervalle entre les dents et instrument destiné au nettoyage de l'intervalle entre les dents
WO2014065368A1 (fr) * 2012-10-24 2014-05-01 サンスター株式会社 Outil de nettoyage interdentaire
WO2015147076A1 (fr) * 2014-03-27 2015-10-01 サンスター スイス エスエー Outil de nettoyage interdentaire et son procédé de fabrication
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108078152A (zh) * 2017-12-13 2018-05-29 倍加洁集团股份有限公司 一种齿间刷单体、其连接排及生产方法
CN108078152B (zh) * 2017-12-13 2024-02-13 倍加洁集团股份有限公司 一种齿间刷单体、其连接排及生产方法
DE102018002147B3 (de) * 2018-03-16 2019-06-13 Interbros Gmbh Interdentalreiniger

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