JP2017108998A - Interdental cleaning tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interdental cleaning tool that can prevent the breaking of a shank.SOLUTION: An interdental cleaning tool (1) comprises a basal part (10) having a shank (20) of a shape that can be inserted between teeth. The basal part (10) is formed of composite material comprising synthetic resin and reinforcement material. The reinforcement material comprises at least one non-fibrous reinforcement material selected from a non-fibrous reinforcement material group consisting of acicular reinforcement material, tabular reinforcement material and granular reinforcement material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an interdental cleaning tool.

  Conventionally, an interdental cleaning tool for cleaning between teeth is known. For example, 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.

International Publication No. 2013/176297

  In the interdental cleaning tool as described in Patent Document 1, the shaft portion is relatively easily broken when a bending load is applied to the shaft portion.

  The objective of this invention is providing the interdental cleaning tool which can suppress a bending of a axial part.

  As a result of intensive studies to solve the above problems, 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.

  Therefore, by reducing (weakening) the anisotropy of the shaft portion, it is possible to obtain a (flexible) shaft portion that is not easily bent against a bending load while ensuring the buckling strength of the shaft portion. I came up with it.

  The present invention is made from such a viewpoint, and is an interdental cleaning tool, including a base portion having a shaft portion having a shape that can be inserted between teeth, and the base portion is made of synthetic resin. The reinforcing material is formed of a composite material including a reinforcing material, and the reinforcing material is at least one non-fibrous reinforcing material selected from a non-fibrous reinforcing material group consisting of a needle-like reinforcing material, a plate-like reinforcing material, and a granular reinforcing material. An interdental cleaning tool including a material is provided.

  In this interdental cleaning tool, 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. 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. . 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.

  In this case, 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.

  In this way, the maintenance of the buckling strength and the flexibility of the shaft portion can be achieved more reliably. Specifically, 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.

  From the viewpoint of increasing the buckling strength of the shaft portion and ensuring flexibility, for example, the non-fibrous reinforcing material group includes mica, wollastonite or scaly glass as the non-fibrous reinforcing material. Preferably, it contains wollastonite or glass flakes, and more preferably contains glass flakes.

  In the interdental cleaning tool, it is preferable that the composite material further includes a low-hardness resin having a hardness lower than that of the synthetic resin.

  If it does in this way, since a shaft part becomes more flexible, breakage of a shaft part will be controlled more certainly.

  In this case, the content of the low-hardness resin in the composite material is preferably 1% by weight or more and 30% by weight or less.

  In this way, ensuring the flexibility of the shaft and ensuring effective buckling strength can be achieved more reliably. Specifically, when the content of the low-hardness resin is 1% by weight or more, the flexibility of the shaft part is more reliably ensured, and when the content of the low-hardness resin is 30% by weight or less, the shaft part The buckling strength of is maintained.

  In the interdental cleaning tool, 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.

  If it does in this way, since the compatibility with the cleaning part and shaft part which consist of elastomers increases, peeling from the shaft part of a cleaning part is controlled.

  As described above, according to the present invention, it is possible to provide an interdental cleaning tool capable of suppressing the bending of the shaft portion.

It is a front view of the interdental cleaning tool of one Embodiment of this invention. It is a figure which shows the measuring method of the flexibility of the axial part of the interdental cleaning tool shown in FIG. It is a figure which shows the measuring method of the flexibility of the axial part of the interdental cleaning tool shown in FIG. It is a graph which shows the relationship between the displacement of a pressing tool in Example 11, and pressing force. It is a graph which shows the relationship between the displacement of the pressing tool in Comparative Example 3, and pressing force. It is a table | surface which shows a composition and various test results of an Example and a comparative example. It is a table | surface which shows a composition of various manufacture examples. It is a table | surface which shows a composition of various manufacture examples. It is a table | surface which shows a composition of various manufacture examples. It is a front view of the modification of the interdental cleaning tool shown in FIG. It is a front view of the modification of the interdental cleaning tool shown in FIG.

  An interdental cleaning tool 1 according to an embodiment of the present invention will be described with reference to FIG. 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. In the present embodiment, 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 along the axial direction of the shaft portion 20 so as to be separated from 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. Moreover, it is preferable that 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. Moreover, it is preferable that 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.

  As 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 (the dimension of the longest part) is usually 20 μm to 90 μm when included in the synthetic resin. The length of the plate-like reinforcing material is usually 10 μm to 150 μm in the state contained in the synthetic resin. The length of the granular reinforcing material is usually 5 μm to 40 μm when included in the synthetic resin. Wollastonite is preferably used as the acicular reinforcement. As the plate-like reinforcing material, mica or scaly glass is preferably used. In addition, the length of fibrous reinforcements, such as glass fiber, is normally 50 micrometers-450 micrometers in the state contained in the said synthetic resin. In addition, 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. Examples of the coupling agent include a silane coupling agent, a titanium coupling agent, an aluminum coupling agent, and a zirconia coupling agent. Examples of 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. Here, when the non-fibrous reinforcing material is mica, 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. When 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. When the non-fibrous reinforcing material is flaky glass, 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.

  From the viewpoint that good buckling strength and flexibility can be obtained, as a low hardness resin, 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 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. In this embodiment, a styrene elastomer is used as the low hardness resin. The Shore A hardness of the elastomer is preferably 20-50. In addition, as a low hardness resin, the hardness should just be smaller than the said synthetic resin used for the said base. For example, when a homopolymer polypropylene is used as the synthetic resin, 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 wt% or more and 30 wt% 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. In the present embodiment, 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. Furthermore, when polypropylene is employed as the synthetic resin, the styrene elastomer is preferable because of its excellent compatibility with polypropylene.

  Next, the manufacturing method of the interdental cleaning tool 1 is demonstrated. This manufacturing method includes a kneading step, a base portion forming step, and a cleaning portion forming step.

  In the kneading step, a composite material is formed by kneading a synthetic resin, a non-fibrous reinforcing material, and a low hardness resin with a kneader. In the present embodiment, since the content of the non-fibrous reinforcing material in the composite material is set to 60% by weight or less, it is kneaded uniformly. Moreover, a part of wollastonite becomes a granular form from a needle shape by being crushed in the kneading step.

  In the base forming 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. As a result, the base 10 is formed. In this embodiment, since 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 | stimulation and pain which a finger receives, for example, when a gate trace is touched with a finger, for example are reduced.

  In the cleaning portion forming step, 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.

  Then, the method of cleaning between teeth with the interdental cleaning tool 1 is demonstrated.

  First, 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. Specifically, in the interdental cleaning tool 1, 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. Therefore, 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.

  Further, since 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 and the flexibility of the shaft part 20 can be achieved more reliably. 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. .

  Further, in the present embodiment, 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.

  Specifically, since 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.

  Moreover, in this embodiment, the elastomer which forms the cleaning part 40 is the same resin as the said 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.

  In addition, it should be thought that the said embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  For example, the low hardness resin contained in the composite material and the elastomer forming the cleaning unit 40 may be different resins. Moreover, at least one of the addition of the low-hardness resin to the synthetic resin and the cleaning unit 40 may be omitted.

  Further, 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.

  About the interdental cleaning tool 1 of the said embodiment, while creating 14 types of Examples, the 3 types of comparative example with respect to the said Example was created. The composition of each example and each comparative example is as shown in FIG. Scale glass is from Nippon Sheet Glass Co., Ltd., Wollastonite is from Kansai Matec Co., Ltd., Keiwa Furnace Co., Ltd., Maruto Co., Ltd., and Mica is from Okabe Mica Industry Co., Ltd. Glass fiber is available from Asahi Fiber Glass Co., Ltd., Nitto Boseki Co., Ltd., Central Glass Co., Ltd., etc. 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. Hereinafter, the test method and test result of each test will be described.

(1) Flexibility of shaft portion 20 As shown in FIGS. 2 and 3, this measurement is performed by using a first base 51 and a second base 52 that are horizontally separated from each other, and a pressing tool 60. It was conducted. The gap between the first base 51 and the second base 52 is set to 10 mm. The lower end of the pressing tool 60 is formed in a sharp shape. Specifically, this measurement is performed at the center between the first base 51 and the second base 52 in the shaft portion 20 with the interdental cleaning tool 1 placed on the first base 51 and the second base 52. It was performed by pressing the central part 21 at 10 mm / min from the state where the lower end of the pressing tool 60 was in contact with the central part 21 to be performed.

  4 and 5 show the test results. 4 is a graph showing the test results of Example 11, and FIG. 5 is a graph showing the test results of Comparative Example 3. 4 and 5, in 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-J1kN (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.

  Here, 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.

  Flexibility = (post-displacement pressing force Fa / maximum pressing force Fmax) × 100

  That is, it is evaluated that the shaft portion 20 is more flexible as this value is closer to 100.

(2) Buckling strength of shaft portion 20 (buckling load)
The buckling load is obtained by pressing the tip of the shaft portion 20 vertically downward with AUTOGRAPH AGS-J1kN (manufactured by Shimadzu Corporation) with the grip portion 30 fixed so that the shaft portion 20 is parallel to the vertical direction. It was measured. The meanings of the symbols shown in FIG. 6 are as follows.

A: 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. Δ: 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, “Δ” 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.

(3) Gate trace Based on the following evaluation criteria, the stimulus felt when 10 monitor persons touched the gate trace with a finger was evaluated.

○: No one felt stimulation Δ: 1 to 6 people felt stimulation ×: 7 to 10 people felt stimulation

(4) Ease of separation The ease of separation when the specific (for example, right end) interdental cleaning tool 1 of the interdental cleaning tool group was separated from the interdental cleaning tool 1 adjacent to the interdental cleaning tool 1 was evaluated. This evaluation was performed by conducting a questionnaire by Visual Analogue Scale that was scored between 0 points (hard to be separated at the connecting portion 32) to 10 points (easy to be separated at the connecting portion 32). FIG. 6 shows a value obtained by rounding off the first decimal place of the average value of the questionnaire results of 10 people.

  The obtained result is shown in FIG. As is clear from FIG. 6, good flexibility was obtained in any of the examples, and in particular, in Examples 1 to 4 and 8 to 14, the value of the flexibility exceeded 94. Moreover, it was shown from the comparison with Example 4 and Example 3 and the comparison with Example 12 and Example 11 that flexibility is improved by including an elastomer.

  Moreover, in any Example, favorable buckling strength was obtained, and in Examples 1-6 and 8-14, further favorable buckling strength was obtained. Among them, although not shown in FIG. 6, in Examples 2 to 6 and 11 to 13, the buckling load was larger than 2.5 N, and better insertability between teeth was obtained.

  Moreover, from these results, in Examples 2 to 4, 11 to 13, the value of the flexibility exceeds 94 and the buckling strength exceeds 2.5N, so that the buckling strength and the flexibility are Both were shown to be particularly superior.

  Further, except for Comparative Example 1, in any of the Examples and Comparative Examples, there was no monitor who felt irritation when touching the gate trace with a finger.

  Moreover, in any of the examples, good separation was obtained.

  Moreover, although not described in FIG. 6, when the test was performed also about the adhesiveness of the axial part 20 and the cleaning part 40, ten monitor persons showed the interdental cleaning tool as described in each Example and each comparative example. As a result, it was found that the cleaning part 40 did not peel from the shaft part 20 in any case, and the shaft part 20 was excellent in compatibility with the cleaning part 40.

  From the above, by including at least one 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 above effects were confirmed in the same manner in each of the production examples shown in FIGS.

DESCRIPTION OF SYMBOLS 1 Interdental cleaning tool 10 Base 20 Shaft part 30 Gripping part 40 Cleaning part 51 1st unit 52 2nd unit 60 Pressing tool

Claims (6)

An interdental cleaning tool,
Including a base portion having a shaft portion having a shape that can be inserted between teeth;
The base is formed of a composite material including a synthetic resin and a reinforcing material,
The interdental cleaning tool, wherein 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 interdental cleaning tool according to claim 1,
The interdental cleaning tool, wherein the content of the non-fibrous reinforcing material in the composite material is 10% by weight or more and 60% by weight or less. In the interdental cleaning tool according to claim 1 or 2,
The non-fibrous reinforcing material group is an interdental cleaning tool including wollastonite or scaly glass as the non-fibrous reinforcing material. In the interdental cleaning tool in any one of Claims 1 thru | or 3,
The interdental cleaning tool, wherein the composite material further includes a low-hardness resin having a hardness lower than that of the synthetic resin. The interdental cleaning tool according to claim 4,
The interdental cleaning tool, wherein the content of the low-hardness resin in the composite material is 1% by weight or more and 30% by weight or less. In the interdental cleaning tool according to claim 4 or 5,
It is made of an elastomer, and further comprises a cleaning part that covers the outer peripheral surface of the shaft part and can clean between the teeth,
The interdental cleaning tool, wherein the elastomer is the same resin as the low-hardness resin.

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