JP5659348B2 - Toothbrush bristle material and toothbrush - Google Patents

Description

  The present invention is superior to conventional toothbrush hair materials in removing plaque and plaque, etc. and having a massage effect, has sufficient durability, and has less adverse effects on the human body and less burden on the environment. The present invention relates to a toothbrush bristle material and a toothbrush.

  Currently, among the bristle materials for brushes, the required performance for bristle materials for toothbrushes used for oral cleaning such as toothbrushes and interdental brushes is not only to remove the food residue remaining in the oral cavity, but also to the tooth surface and interdental space. An important theme is the cleaning effect essential for preventing periodontal disease and the promotion of gingival blood circulation by removing foreign substances such as plaque and plaque deposited on the skin.

  As a means for removing these plaques and plaque, and further enhancing the massage effect on the gums, there have been means for adjusting the diameter and length of the toothbrush bristle material and selecting the material appropriately. Although it has been adopted, increasing the diameter and increasing rigidity to remove plaque and plaque makes it difficult to obtain a massage effect due to poor touch on the gums. When the material was selected, there was a trade-off between the weakness of the hair and the difficulty of obtaining plaque and plaque removal effects.

  Thus, a tapered bristle (for example, see Patent Document 1) in which a thermoplastic resin filament is chemically treated has been proposed as a means other than changing the diameter, hair length, and material.

  However, this tapered bristle can be expected to obtain a massage effect by appropriately controlling the thickness of the tip, but since the tip is thin, the hair tip is soft and the plaque and plaque removal effect is insufficient.

  In addition, as a means for enhancing the effect of removing plaque and plaque, spherical particles having an average particle diameter of 10 to 100 μm made of a thermoplastic resin such as polymethyl methacrylate, polystyrene, polyamide, and silicon resin are used for the entire filament. Oral brush filaments (for example, see Patent Document 2) containing 0.1% by weight or more and having convex portions reflecting the shape of spherical particles on the filament surface, or plastics having a particle size of about 0.10 to 10 μm Particles, rubber particles, calcium carbonate, aragonite clay, orthorhombic clay, calcite clay, rhombohedral clay, kaolin clay, bentonite clay, dicalcium phosphate, anhydrous dicalcium phosphate, dicalcium phosphate Dihydrate, tricalcium phosphate, insoluble sodium metaphosphate, precipitated calcium carbonate , Magnesium orthophosphate, trimagnesium phosphate, hydroxyapatite, synthetic apatite, alumina, hydrated alumina, hydrated silica xerogel, metal aluminosilicate complex, aluminum silicate, zirconium silicate, silicon dioxide, etc. A material (for example, see Patent Document 3) has already been proposed.

  However, since the particles used in these toothbrush bristle materials are mainly thermoplastic resins and inorganic compounds, these particles fall off during use as a toothbrush and enter the body, causing some adverse effects on the human body. In the disposal after use, since these substances may have an impact on the environment, they are practically not used for toothbrushes.

  Therefore, as an abrasive for toothbrush bristle material, there is a demand for an abrasive that is inexpensive, has good workability, has little effect on the human body, and has a low environmental impact after disposal. Therefore, there is a need for a toothbrush bristle material and a toothbrush that have a high abrasiveness as well as a massage effect on the gums and a moderate resistance to broken hair, which are the basic performance of a toothbrush.

JP 2004-208816 A JP 11-2116018 A Japanese Patent No. 4008025

  The present invention is a toothbrush that is superior in the effect of removing plaque and plaque and the massage effect, has sufficient durability, and has less adverse effects on the human body and less burden on the environment than conventional bristle materials for toothbrushes. It is an object to provide a bristle material and a toothbrush.

To achieve the above object, according to the present invention, there is provided a toothbrush bristle material comprising a cut bristle of a thermoplastic resin monofilament, wherein the thermoplastic resin monofilament is a thermoplastic resin 99. It is obtained by melt spinning a mixture of 9% by weight to 95.0% by weight and 0.1% by weight to 5.0% by weight of porous carbon material ceramic particles made of rice bran and / or moss. A toothbrush bristle material is provided.

In the toothbrush bristle material of the present invention,
The average particle size of the porous carbon agent is in the range of 1.0 to 3.0 μm,
A preferable condition is that a taper shape is formed at least at one end of the cut bristle. When this condition is satisfied, a more excellent effect can be obtained.
The toothbrush of the present invention is characterized in that the toothbrush bristle material is used as at least a part of the bristle material.

  According to the present invention, since porous carbon agent ceramic particles made of rice bran and / or moss are used as an abrasive, compared with conventional toothbrush bristle material, the effect of removing plaque and plaque and the like It is possible to obtain a toothbrush bristle material and toothbrush that are excellent in massage effect and have sufficient durability, and that have less adverse effects on the human body and less burden on the environment.

These are side views which show an example of the bristle material for toothbrushes of this invention. These are sectional drawings perpendicular | vertical to the longitudinal direction of the bristle material for toothbrushes of this invention.

  Hereinafter, the present invention will be specifically described with reference to the drawings.

  FIG. 1 shows a side view of a toothbrush bristle material according to the present invention, wherein 10 is a toothbrush bristle material, 20 is a thermoplastic resin, and 21 is a porous carbon material ceramic particle.

  FIG. 2 is also a cross-sectional view perpendicular to the longitudinal direction. Similarly, 10 represents a toothbrush bristle material, 20 represents a thermoplastic resin, and 21 represents porous carbon agent ceramic particles.

As shown in FIGS. 1 and 2, the toothbrush bristle material of the present invention is a toothbrush bristle material made of a cut bristle of a thermoplastic resin monofilament, and the thermoplastic resin monofilament comprises 99. Melt spinning a mixture of 9 % to 95.0% by weight of thermoplastic resin 20 and 0.1% to 5.0% by weight of porous carbonaceous ceramic particles 21 made of rice bran and / or moss. It is characterized by being formed.

  The thermoplastic resin 20 used in the present invention is not particularly limited. For example, nylon 6, nylon 66, nylon 612, nylon 46, nylon 56, nylon MDX6, nylon 11, nylon 12, nylon 6, 66 A polyamide-based resin such as a copolymer, or a blend of two or more of these may be used.

  Examples of the thermoplastic resin 20 other than the polyamide resin include polyester resins such as polyethylene terephthalate (hereinafter referred to as PET), polybutylene naphthalate (hereinafter referred to as PBT), polypropylene terephthalate, and polypropylene naphthalate. In particular, PBT can be preferably used because it has an appropriate bristle and can be easily tapered into one end of a cut bristle by a chemical weight loss method using an alkaline solution.

  Furthermore, as the thermoplastic resin 20 other than the polyamide-based resin or the polyester-based resin, polyphenylene sulfide, polyvinylidene fluoride, ethylene / tetrafluoroethylene copolymer, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer Polytetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / vinylidene fluoride copolymer, tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride copolymer, polychlorotrifluoroethylene, ethylene chloride / Examples include fluororesins such as tetrafluoroethylene copolymer and fluorovinyl ether, polyolefin resins, etc., and one or two or more types are appropriately selected from these. Rukoto is also possible.

  On the other hand, the porous carbon agent ceramic particles 21 used in the present invention are composed of rice bran and / or moss, and have the greatest feature that they are a material having a very small adverse effect on the human body and an environmental load. For example, the porous carbon material ceramic particles 21 may be produced by baking and carbonizing a mixture of defatted rice bran and phenolic resin in a vacuum or an inert gas, followed by cooling and pulverization classification. It is also possible to obtain and use “RB Ceramic” manufactured by Sanwa Oil Co., Ltd. as a commercial product.

  Furthermore, regarding the production of the porous carbon material ceramic particles 21, the ratio of rice bran in the mixture of rice bran / boiled rice and phenolic resin varies depending on the type of rice bran, but may be, for example, rice bran after degreasing. It is preferably about 5 to 80% by weight, about 5 to 70% by weight for soot, and about 5 to 60% by weight for gluten feed.

  Further, the content of the porous carbon agent ceramic particles 21 in the thermoplastic resin monofilament needs to be in the range of 0.1 wt% to 5.0 wt%, and the addition of the porous carbon agent ceramic particles 21 is required. If the amount is less than the above range, it is difficult to sufficiently obtain the effect of removing plaque, plaque and the like. Conversely, if the amount is more than the above range, the porous carbon agent ceramic particles 21 are foreign substances in the thermoplastic resin filament. Therefore, it is not preferable because physical properties such as strength are reduced, causing breakage of the hair and the like, and the effect of removing plaque, plaque, etc. and the effect of massaging are likely to be invited at an early stage.

  Further, the porous carbon agent ceramic particles 21 have an average particle diameter of 1.0 to 3.0 [mu] m, and when used as a toothbrush, an effect of removing plaque and plaque and a massage effect can be obtained. It is preferable because the toothbrush bristle material 10 is easy to obtain and excellent in durability such as breakage.

  In other words, if the average particle size is below the above range, it is difficult to obtain an effect of removing plaque, plaque, etc. Conversely, if the average particle size exceeds the above range, the tactile sensation is deteriorated and a massage effect is obtained. In addition to being difficult, the porous carbon agent ceramic particles 21 exist as a foreign substance in the thermoplastic resin filament, so that physical properties such as strength are reduced, causing breakage and the like, and removing plaque and plaque. Decrease in effect and massage effect tends to be invited early.

  Further, when one end of the cut bristle is processed into a taper shape, the average particle diameter of the porous carbon material ceramic particles 21 is smaller than the taper tip diameter, so that it is easy to form a uniform taper shape. It is preferable that it is 0-2.0 micrometers.

  In the past, powder and shells generated during the processing of shells such as buckwheat, buckwheat, husk, soybean husk, and gluten feed produced when wheat is ground to flour have been used for agriculture. The present invention has been used only as a raw material, but this is processed into porous carbon agent ceramic particles and added to a toothbrush bristle material as an abrasive. It can be said that this is a new technology that pioneered new fields that can be reused.

  Next, the manufacturing method of the bristle material 10 for toothbrushes of this invention is demonstrated.

  First, it is not necessary to employ any special method for producing the thermoplastic resin monofilament. For example, the thermoplastic resin monofilament can be produced using a known melt spinning machine.

  Specifically, a thermoplastic resin pellet and porous carbon material ceramic particles, or a master batch in which a thermoplastic resin pellet and porous carbon material ceramic particles are kneaded in a high concentration in a thermoplastic resin in advance are supplied to a melt spinning machine. Then, after melt-kneading in a melt spinning machine, a mixture of porous carbon agent ceramic particles and thermoplastic resin is extruded from the die.

  The extruded mixture is cooled and solidified in a cooling bath, and then drawn, heat set and wound up to obtain a thermoplastic resin monofilament.

  Next, the wound thermoplastic resin monofilament is bundled in a bundle, and is fixed by winding a paper tape or the like around it, and further cut into a desired length to form a toothbrush bristle material 10.

  If a tapered shape is formed at one end of the toothbrush bristle material 10, it can be easily made by immersing one end of the toothbrush bristle material 10 in an alkaline solution or an acidic solution.

  In addition, the diameter of the bristle material 10 for toothbrushes of this invention can be suitably selected according to a use purpose, Although it does not specifically limit, The range of 0.10 mm-0.30 mm is common.

  Furthermore, within the range that does not affect the purpose and effect, the toothbrush bristle material 10 of the present invention includes particles such as various inorganic particles, various metal particles, and crosslinked polymer particles, an antioxidant, a light-resistant agent, and an anti-glare agent. Further, ion exchangers, anti-coloring agents, antistatic agents, various coloring agents, waxes, silicone oils, various surfactants, various reinforcing fibers, and the like can also be added.

  Furthermore, the cross-sectional shape of the toothbrush bristle material 10 of the present invention is not particularly limited, and besides a circular shape, a hollow shape, a flat shape, a square shape, a half moon shape, a triangular shape, a polygon shape having five or more corners, a multi-leaf shape, a dock bone shape, and Any shape can be selected as required, such as a saddle shape, and it may be twisted or crimped in the length direction.

  Hereinafter, the toothbrush bristle material of the present invention will be described in detail with reference to examples, but the toothbrush bristle material of the present invention is not limited to the following examples unless it exceeds the gist.

  In addition, about the practical evaluation (cleaning property, usability | use_condition, and fracture durability) of the toothbrush in an Example and a comparative example, it performed with the following toothbrush for evaluation.

[Production of evaluation toothbrush]
Thirty-four hair transplant holes with a diameter of 1.5 mm and a depth of 3.0 mm were processed on a polypropylene (9 mm × 22 mm) toothbrush base, and 20 toothbrush hair materials per hole were planted into the flock holes.

[Cleanability]
First, an uneven plate made of stainless steel that looks like pseudo teeth was prepared, virtual stain was applied to the surface, and mass (A) was measured. Thereafter, the evaluation toothbrush was pressed against the stainless uneven plate vertically with a load of 150 g, and slid 5000 times at an amplitude of 10 mm and a speed of 180 reciprocations / minute, and the mass (B) of the stainless uneven plate was measured again. And plaque removal rate (%) was calculated | required using the following (I) formula. A higher plaque removal rate indicates a toothbrush with a higher plaque and plaque removal effect.
Dental plaque removal rate (%) = (A−B) / A × 100 (I)

[Usage feeling]
Twenty adults were allowed to use each toothbrush for 5 days, and the total score of the following score evaluation was calculated for the comfort on the gums. A higher total score indicates a toothbrush with a higher massage effect.
5 points: Very comfortable,
4 points: It was more comfortable than a conventional toothbrush,
3 points: Same as conventional toothbrush,
2 points: Not very comfortable,
1 point: Not comfortable at all.

[Durability]
In said cleaning property evaluation, the state of the bristle material for toothbrushes after sliding 5000 times was evaluated based on the following criteria.
A: Number of broken hairs 0 to 5 B: Number of broken hairs 6 to 10 C: Number of broken hairs 11 to 20 D: Number of broken hairs 20 or more

[Example 1]
98.0% by weight of PBT resin pellets (1200S manufactured by Toray Industries, Inc.) and 2.0% by weight of porous carbon agent ceramic particles (RB ceramic manufactured by Sanwa Oil Co., Ltd.) having an average particle size of 2.0 μm Then, it was fed into the spinning machine, melted and kneaded in the spinning machine, and extruded from the die.

  Then, after the extruded resin melt is cooled and solidified in a cooling bath, it is subsequently drawn into a hot water bath and a dry heat bath and subjected to stretching and heat setting to form a thermoplastic resin monofilament having a diameter of 0.200 mm. A plastic resin monofilament was cut to 30 mm to obtain a toothbrush bristle material.

[Example 2]
A toothbrush bristle material was obtained in the same manner as in Example 1 except that the PBT resin pellets were changed to 99.9% by weight and the porous carbon agent ceramic particles were changed to 0.1% by weight.

[Example 3]
A toothbrush bristle material was obtained in the same manner as in Example 1 except that the PBT resin pellets were changed to 95.0 wt% and the porous carbon agent ceramic particles were changed to 5.0 wt%.

[Example 4]
A toothbrush bristle material was obtained in the same manner as in Example 1 except that the average particle size of the porous carbon material ceramic particles was changed to 3.5 μm.

[Example 5]
The toothbrush bristle material obtained in Example 1 was further immersed and dissolved in an aqueous sodium hydroxide solution to form a tapered shape at one end thereof.

[Comparative Example 1]
A toothbrush bristle material was obtained in the same manner as in Example 1 except that the porous carbon agent ceramic particles were not added.

[Comparative Example 2]
A toothbrush bristle material was obtained in the same manner as in Example 1 except that the PBT resin pellets were changed to 93.0% by weight and the porous carbon agent ceramic particles were changed to 7.0% by weight.

[Comparative Example 3]
A toothbrush bristle material was obtained in the same manner as in Example 1 except that 2.0% by weight of silicon dioxide having an average particle diameter of 2 μm was added instead of the porous carbon agent ceramic particles.

  As is clear from the results in Table 1, the toothbrush bristle material (Examples 1 to 5) of the present invention has a toothbrush bristle material (Comparative Example 1) that does not contain porous carbon agent ceramic particles, and conversely the added amount. Compared to many toothbrush bristle materials (Comparative Example 2), it can be seen that they are excellent in the effect of removing plaque, plaque and the like and in the massage effect, and have a high resistance to breakage.

  Moreover, since the bristle material for toothbrushes of the present invention uses porous carbon agent ceramic particles made of rice bran and / or moss, the bristle material for toothbrushes to which conventional inorganic compound particles are added (Comparative Example 3) On the other hand, it can be said that the toothbrush is extremely practical because it has little adverse effect on the human body even if particles fall off and enters the body, and it is difficult to give a load to the environment when discarded after use.

  The toothbrush bristle material and toothbrush of the present invention are superior to the conventional toothbrush bristle material in the removal effect of plaque and plaque and the massage effect, have sufficient durability, and further have an adverse effect on the human body. Since the burden on the environment is small, the contribution to the industry is extremely large.

  In addition, powder and shells generated during the processing of shells such as buckwheat, buckwheat, husk, soybean husk, and gluten feed that are generated as wheat flour when powdered into flour have been used in agriculture so far. The present invention has been used only as a raw material, but this is processed into porous carbon agent ceramic particles and added to a toothbrush bristle material as an abrasive. It can be said that this is a new technology that pioneered new fields that can be reused.

10 Toothbrush hair material 20 Thermoplastic resin monofilament 21 Porous carbon agent ceramic particles

Claims (4)

A bristle material for toothbrush comprising a cut bristle of a thermoplastic resin monofilament, wherein the thermoplastic resin monofilament is a thermoplastic resin 99. It is obtained by melt spinning a mixture of 9 % by weight to 95.0% by weight and 0.1% by weight to 5.0% by weight of porous carbon material ceramic particles made of rice bran and / or moss. Toothbrush bristle. The bristle material for toothbrushes according to claim 1, wherein an average particle size of the porous carbon agent is in a range of 1.0 to 3.0 µm. The bristle material for a toothbrush according to claim 1 or 2, wherein a taper shape is formed at least at one end of the cut bristle. A toothbrush comprising the toothbrush bristle material according to any one of claims 1 to 3 as at least a part of the bristle material.

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