WO2017111008A1 - Brush bristle material, and brush using same - Google Patents

Brush bristle material, and brush using same Download PDF

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Publication number
WO2017111008A1
WO2017111008A1 PCT/JP2016/088357 JP2016088357W WO2017111008A1 WO 2017111008 A1 WO2017111008 A1 WO 2017111008A1 JP 2016088357 W JP2016088357 W JP 2016088357W WO 2017111008 A1 WO2017111008 A1 WO 2017111008A1
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WO
WIPO (PCT)
Prior art keywords
island
sea
brush
composite fiber
bristle material
Prior art date
Application number
PCT/JP2016/088357
Other languages
French (fr)
Japanese (ja)
Inventor
山本健雄
土岐美鈴
飛田哲成
柴田剛志
増田正人
山中博文
Original Assignee
東レ・モノフィラメント株式会社
東レ株式会社
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 東レ・モノフィラメント株式会社, 東レ株式会社 filed Critical 東レ・モノフィラメント株式会社
Priority to KR1020187019635A priority Critical patent/KR20180097625A/en
Priority to JP2017508117A priority patent/JP6924994B2/en
Priority to CN201680075566.8A priority patent/CN108601447A/en
Publication of WO2017111008A1 publication Critical patent/WO2017111008A1/en

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    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/04—Preparing bristles
    • A46D1/05—Splitting; Pointing

Definitions

  • the present invention relates to a brush bristle material suitable for various brushes including a toothbrush and a brush using the same.
  • a technique using a monofilament of synthetic fiber as a hair material for a brush is widely known.
  • a brush using such a brush bristle material for example, a toothbrush
  • the effect of cleaning the teeth by the bristles and the effect of massaging such as soft touch and gums that do not damage the object to be cleaned are excellent in a good balance. It is desirable.
  • the bristle material for the brush is formed of a monofilament made of a single material up to the hair tip, it may be difficult to satisfy such a requirement.
  • the brush bristle material is made thicker, the brush becomes stronger and the effect of cleaning the tooth flat surface and the massage effect such as gums are enhanced.
  • the cleaning effect between the teeth may be reduced, or the feeling of touching the gums may become too strong, and the gums may be easily damaged.
  • the hair material for the brush is made thin with a single material monofilament up to the bristles, the cleaning effect between the teeth can be enhanced, but the waist of the brush hair material becomes weaker over the entire length, and the gums There is a risk that the massage effect such as, etc. may be reduced, or the durability of the hair material itself may be reduced.
  • sea-island composite fibers are used as the bristle material for the brush, and the sea-island component is contained at the base of the bristle when used for the brush.
  • a bristle material for a brush having an integrated composite fiber structure in which a large number of islands are exposed and separated at the tip Patent Document 1.
  • the brush bristle material proposed in Patent Document 1 still has the following problems. That is, the islands are distributed over the entire cross-sectional area of the sea-island composite fiber used as the bristle material for the brush, and the islands are exposed at the tip of the bristle material.
  • the sea that supports the exposed island with the base of the bristle material may be torn, and durability is not good. The problem remains that it may be sufficient.
  • the object of the present invention is to pay attention to the excellent features and remaining problems of the bristle material for brush as described in the conventional patent document 1, and to substantially free the island part which has been proposed recently. Focusing on the manufacturing technology of sea-island composite fibers that can be designed in a simple manner, providing a brush hair material that has excellent durability and has excellent cleaning properties without damaging the object to be cleaned, and a brush using the same It is in.
  • a brush hair material according to the present invention is for a brush in which islands at one or both longitudinal ends of sea-island composite fibers made of two or more types of resins having different drug dissolution rates are exposed.
  • An outer peripheral surface forming portion that is a bristle material and forms an outer peripheral surface of the sea-island composite fiber is composed only of a sea part, and the island part of the sea-island composite fiber is the outer peripheral surface in a cross section of the sea-island composite fiber. It consists of what is characterized by being unevenly distributed in the site
  • the outer peripheral surface forming part that forms the outer peripheral surface of the sea-island composite fiber is composed of only the sea part, and the island part of the sea-island composite fiber is the outer periphery in the cross-section of the sea-island composite fiber,
  • the island portion closest to the outer peripheral surface forming portion has a certain thickness at the root portion of the exposed island portion and the vicinity thereof (site on the composite fiber side).
  • the island part of the sea-island composite fiber is unevenly distributed in a region near the center other than the outer peripheral surface forming part formed by the sea part having a certain thickness or more in the cross section of the sea-island composite fiber, Since the unevenly distributed island portion is exposed at the tip of the hair material, it is difficult to damage the object to be cleaned by the exposed island portion, and the advantage that an excellent cleaning effect can be obtained is utilized, and more than a certain thickness Excellent durability is realized by the outer peripheral surface forming portion made of the sea portion.
  • the thickness of the sea part constituting the outer peripheral surface forming portion expresses the excellent durability. It is preferable that it is more than a sufficient value.
  • the ratio Ts / Di between the diameter Di of the island part immediately adjacent to the outer peripheral surface forming part and the thickness Ts of the sea part of the outer peripheral surface forming part in the cross section of the sea-island composite fiber is 1.2. The above is preferable. As a result, excellent durability due to the outer peripheral surface forming portion composed of the sea portion having a thickness greater than or equal to the predetermined thickness is more reliably realized.
  • Ts / Di is preferably 1.5 or more, more preferably 2.0 or more.
  • the exposed length of the island portion exposed at one or both ends in the longitudinal direction of the sea-island composite fiber is preferably in the range of 0.5 to 10 mm. More preferably, it is in the range of 1 to 5 mm.
  • the exposed length of the island portion is shorter than 0.5 mm, it is difficult to obtain an excellent cleaning property for fine parts such as a space between the exposed island portions, and it is difficult to obtain a good soft touch.
  • the exposed length of the island portion is longer than 10 mm, the exposed island portion with a weak waist may become too long, and the exposed island portion is deformed too much, and the cleaning effect by the exposed island portion (for example, the effect of entwining dirt) In addition, the massage effect such as gums may be insufficient.
  • the diameter of the island part is preferably in the range of 1 to 20 ⁇ m, more preferably the diameter Di of the island part immediately adjacent to the outer peripheral surface forming part, It is in the range of 1 to 10 ⁇ m. If the diameter of this island portion is less than 1 ⁇ m, the exposed island portion becomes too thin and the exposed island portion becomes too weak, and it may be difficult to obtain the exposed island portion necessary for cleaning. If the diameter of the island portion is larger than 20 ⁇ m, the exposed island portion becomes too strong, and it becomes difficult to obtain excellent cleaning properties for fine parts such as between teeth, and it is also difficult to obtain a soft tactile sensation. There is.
  • the diameter of the island portion means the diameter when the cross-sectional shape of the island portion is circular, and the diameter of the circumscribed circle when the cross-sectional shape is other than circular. The same applies to the diameter of the sea-island composite fiber described later. In addition, regarding the diameter of this island part, all the island parts may not be the same thickness.
  • the number of the island portions in the cross section of the sea-island composite fiber is preferably 20 or more. Therefore, it is preferable that the number of island portions exposed at one or both ends in the longitudinal direction of the sea-island composite fiber forming one brush hair material is 20 or more.
  • the number of islands By setting the number of islands to 20 or more, it becomes easier to entangle dirt by the exposed islands, and the cleaning property is further improved, and also when the performance of retaining cosmetics, foaming performance, etc. is required. , It will be easier to demonstrate their performance.
  • the diameter of the sea-island composite fiber is preferably in the range of 50 to 1,000 ⁇ m, and more preferably in the range of 80 to 500 ⁇ m. If the diameter of the sea-island composite fiber is less than 50 ⁇ m, the waist of the sea-island composite fiber part itself when used for a brush becomes too weak, and the cleaning effect may be lowered depending on the application. When the diameter of the sea-island composite fiber exceeds 1,000 ⁇ m, the waist of the sea-island composite fiber part itself when used for a brush becomes too strong, depending on the form (length and diameter) of the exposed island part at the tip part. There is a possibility that the sea-island composite fiber portion at the root portion of the exposed island portion is strongly pressed against the object to be cleaned and easily damages the object to be cleaned.
  • the resin species constituting the sea-island composite fiber is not particularly limited as long as it is composed of two or more types of resins having different drug dissolution rates.
  • the sea part of the sea-island composite fiber Is made of a polyester resin, and the island part can be exemplified by a resin having a slower drug dissolution rate than the polyester resin.
  • a form in which the sea part is made of polybutylene terephthalate and the island part is made of nylon (registered trademark)
  • a form in which the sea part is made of polyethylene terephthalate and the island part is made of polybutylene terephthalate can be exemplified.
  • the cross-sectional shape of the sea-island composite fiber can be set to an arbitrary shape, and the cross-sectional shape is formed in a circular shape. Any of the shapes formed in irregular cross-sectional shapes other than a circle (for example, a polygon such as a triangle or a quadrangle, a multileaf shape, etc.) can be employed.
  • This cross-sectional shape can be set according to the application and intended use. Further, a usage form in which a plurality of types of cross-sectional shapes are mixed is also possible.
  • the cross-sectional shape of the island part of the sea-island composite fiber can be set to a substantially arbitrary shape in the same manner. Any of the shapes formed in the irregular cross-sectional shape (for example, a polygon such as a triangle or a quadrangle, a Y shape, etc.) can be adopted. This cross-sectional shape can also be set according to the application and intended use. Moreover, the form in which multiple types of cross-sectional shapes were mixed is also possible.
  • the tip of the island part exposed at the end part (one end part or both end parts) of the sea-island composite fiber can be tapered to form a sea-island composite fiber. It is also possible to form a shape in which the cross-sectional shape of the inner island portion is substantially maintained up to the tip of the exposed island portion.
  • the form in which the tip of the exposed island portion is tapered and tapered is formed by, for example, configuring the sea portion with a resin having a higher dissolution rate and a island portion with a resin having a lower dissolution rate with respect to the drug for dissolution. Can be achieved.
  • the form in which the cross-sectional shape of the island part is formed into a shape that is substantially maintained up to the tip of the exposed island part is, for example, constituted by a resin that dissolves only in the sea part in the medicine for dissolution, and the island part is used as the medicine. On the other hand, it can be achieved by comprising a resin that does not dissolve.
  • the sea-island composite fiber may have island parts made of different materials. Furthermore, it is also possible to have a form having a plurality of island portions having different cross-sectional sizes. Thus, by having a plurality of types of islands, it is possible to have a plurality of functions.
  • the present invention also provides a brush in which the brush hair material according to the present invention as described above is used at least in part.
  • the brush according to the present invention uses a bristle material that does not damage the object to be cleaned as described above, has excellent cleaning properties, is excellent in durability, and provides a soft touch. It is particularly suitable as a toothbrush, precision cleaning brush, face washing brush, makeup brush, and the like.
  • a range of 1 to 50 mm is exemplified as a preferable range of bristle length (length from the brush root to the bristles), more preferably The range is 5 to 35 mm.
  • brushes suitable as toothbrushes, precision cleaning brushes, face washing brushes, makeup brushes, etc. are provided. can do.
  • FIG. 1 shows a bristle material for a brush according to an embodiment of the present invention
  • FIG. 1 (A) is a schematic side view of one end of the bristle material
  • FIG. 1 (B) is a BB line in FIG. 1 (A).
  • FIG. It is a schematic block diagram which shows the flocking method at the time of using the bristle material for brushes for a toothbrush. It is a schematic side view of the one end part of the bristle material for brushes concerning another embodiment of the present invention. It is a schematic cross-sectional view which shows the various form examples of the bristle material for brushes concerning this invention. It is a schematic cross-sectional view which shows another various form example of the bristle material for brushes concerning this invention.
  • FIG. 1 shows a bristle material 1 for a brush according to an embodiment (Embodiment 1) of the present invention
  • FIG. 1 (A) shows one end of the bristle material 1.
  • the brush bristle material 1 is composed of two or more kinds of resins (two kinds of resins in the illustrated example) having different drug dissolution rates, and includes a sea part 2 and an island part 3.
  • the island shape 3 is formed from one end or both ends in the longitudinal direction of the sea-island composite fiber 4 (FIG. 1A shows only one end of the bristle material 1).
  • the exposed island portion 3 is referred to as an exposed island portion 3a.
  • the outer peripheral surface forming part 5 that forms the outer peripheral surface of the sea-island composite fiber 4 is composed of only the sea part 2, and the sea-island composite fiber 4
  • the island part 3 is unevenly distributed in the region near the center other than the outer peripheral surface forming part 5 over the entire region near the center.
  • the ratio Ts / Di between the diameter Di of the island portion 3 immediately adjacent to the outer peripheral surface forming portion 5 and the thickness Ts of the sea portion 2 of the outer peripheral surface forming portion 5 in the cross section of the sea-island composite fiber 4 is 1.2.
  • the sea-island composite fiber 4 is produced as described above.
  • the sea-island composite fiber 4 having such a form is a technique that can be designed substantially freely in terms of the size, arrangement, cross-sectional shape, arrangement density, etc. of the island part relative to the sea part, as described in Patent Documents 2 to 4 described above. Can be intentionally produced.
  • the sea-island composite fiber 4 is produced using a conventionally known so-called pipe-type sea-island composite base (a base in which island components are finely divided by a group of pipes and distributed in a predetermined state in the sea component). Is also possible.
  • the target sea-island composite fiber 4 can be produced more easily and with higher accuracy by using the techniques described in Patent Documents 2 to 4.
  • the exposed island portion 3a at the longitudinal end of the sea-island composite fiber 4 is formed as follows, for example. Since the sea-island composite fiber 4 is composed of two types of resins, namely, a sea part 2 forming resin and an island part 3 forming resin, which have different drug dissolution rates (for example, dissolution rate by alkali treatment), for example, the sea part 2 is made alkaline. Formed with polybutylene terephthalate (PBT) as a polyester-based resin that is dissolved in, and the island 3 is formed with nylon (Ny) (registered trademark) as a resin that is not dissolved with an alkali.
  • PBT polybutylene terephthalate
  • nylon Ned trademark
  • the above-mentioned predetermined length of the process of performing the alkali treatment to dissolve only the sea part 2 and leaving the island part 3 not dissolved is the exposed length of the exposed island part 3a. As described above, this exposed length is preferably in the range of 0.5 to 10 mm.
  • the exposed island part 3a is comprised from the resin which is not melt
  • the cross-sectional shape of the sea-island composite fiber 4 and the cross-sectional shape of the island part 3 are both formed in a circular shape.
  • the preferred range of the diameter of the island portion 3 in the sea-island composite fiber 4 in particular, the diameter Di of the island portion 3 immediately adjacent to the outer peripheral surface forming portion 5, the preferred range of the number of the island portions 3 in the cross section of the sea-island composite fiber 4,
  • the preferable range of the diameter of the fiber 4 is as described above.
  • the brush bristle material 1 configured as described above is used at least in part for the production of various brushes.
  • a method for flocking a brush bristle material on a brush component two types of methods are typically known, but these two types of methods are illustrated with reference to the case of use in a toothbrush as an example. This will be described with reference to FIG.
  • FIG. 2 (A) shows a toothbrush 13 in which the brush bristle material 11 is planted on the head part of the toothbrush constituting member 12.
  • FIG. 2 (A) a- There are two types of methods as shown in FIGS. 2B and 2C which are enlarged cross-sectional views along the a line.
  • FIGS. 2B and 2C are two types of methods as shown in FIGS. 2B and 2C which are enlarged cross-sectional views along the a line.
  • the brush bristle material 11 folded in half is inserted into the flock hole 14 and the brush bristle material 11 is fixed to the toothbrush component 12 with a fixture called a flat wire 15. .
  • the completed toothbrush is usually called a flat wire toothbrush.
  • both ends of the brush bristle material 11 prepared in advance are the bristles of the brush.
  • one end portion of the brush bristle material 11 is inserted into the through hole 16 of the head surface side member 12a of the toothbrush constituting member 12, and the end portion of the brush bristle material 11 thus inserted is inserted.
  • a heating device (not shown) is applied to form a lump for preventing or fixing called a roasted ball 17, and after that, the head portion back side member 12b is joined to conceal the roasted ball 17 to complete a toothbrush product.
  • the completed toothbrush is usually called a flat wire toothbrush.
  • one end of the brush bristle material 11 prepared in advance serves as a brush tip.
  • the exposed island portions 3a described above are formed at both ends of the bristle material 1 for brushes, and a flat wire toothbrush.
  • the exposed island portion 3 a is formed at one end of the brush bristle material 1.
  • the island part 3 of the sea-island composite fiber 4 is unevenly distributed in the site
  • the ratio Ts / Di between the thickness Ts of the outer peripheral surface forming part 5 formed only by the sea part 2 and the diameter Di of the island part 3 immediately adjacent to the outer peripheral surface forming part to be 1.2 or more,
  • the island part 3 immediately adjacent to the outer peripheral surface forming part as a result, the exposed island part 3a is supported at the base part of the island part 3 covered with the sea part 2 having a sufficient thickness, and external force is repeatedly applied to the exposed island part 3a. Also when added, it is prevented that the sea part 2 supporting the exposed island part 3a is torn due to the external force, and high durability of the bristle material 1 for a brush is realized.
  • FIG. 3 shows one end portion of a brush bristle material 21 according to another embodiment (Embodiment 2) of the present invention.
  • the exposed island portion 23 exposed from the sea-island composite fiber 22 at the end portion of the bristle material 21 for the brush is formed with a tapered shape at the tip end portion.
  • the brush bristle material 21 having such a form is, for example, a resin (for example, polyethylene terephthalate (PET)) having a faster dissolution rate in the sea than an alkali as a dissolving agent, and a resin having a slower dissolution rate in the island. (For example, polybutylene terephthalate (PBT)).
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • the sea around the exposed island 23 is removed by the alkali treatment at the portion where the exposed island 23 is formed, and the exposed island 23 remains, but the exposed island 23 is gradually removed by the slow dissolution due to the alkali treatment. And is formed into a tapered shape. Further, under the influence of the alkali treatment at the end of the sea-island composite fiber 22, the shoulder part of the sea-island composite fiber 22 that is left connected to the exposed island part 23 is rounded as shown in the figure. Smooth shape.
  • the object to be cleaned is hardly damaged and a soft tactile sensation is obtained as in the first embodiment.
  • excellent cleaning properties are exhibited even for fine parts, and excellent durability is obtained.
  • the cleanability since the tip of the exposed island portion 23 is sharp, it is possible to exert an excellent cleaning effect even for a finer portion.
  • Table 1 summarizes typical characteristics of Embodiment 1 and Embodiment 2 when applied to a toothbrush.
  • the sea part is made of polybutylene terephthalate (PBT) and the island part is made of nylon (Ny) (registered trademark).
  • the sea part is made of polyethylene terephthalate (PET)
  • the island part is made of polybutylene terephthalate ( PBT)
  • exposed islands were formed by alkali treatment.
  • the characteristics of the bristle material for brushes in Table 1 are shown as contrast characteristics with the bristle material for brushes formed of nylon (registered trademark) monofilament, which is usually a single material, and the durability of the bristle material for brushes. Is shown as a contrast characteristic with the hair material described in Patent Document 1 described above.
  • a circle in Table 1 indicates that the characteristic is equal to or higher than that of the object to be compared, and an ⁇ indicates that it is significantly superior to the object to be compared.
  • the sea-island composite fiber can take various cross-sectional forms. Various forms are illustrated in FIGS. 4 and 5.
  • the brush bristle material 31 shown in FIG. 4 (A) is substantially the same as that shown in FIG. 1 (B), and consists of the sea-island composite fiber 34 composed of the sea part 32 and the island part 33, and only the sea part. It has the outer peripheral surface forming part 35 more than predetermined thickness.
  • the brush bristle material 41 shown in FIG. 4 (B) has a sea-island composite fiber 44 composed of a sea part 42 and an island part 43, and an outer peripheral surface forming part 45 consisting of only the sea part and having a predetermined thickness or more.
  • the cross-sectional shape of 44 is formed in a substantially square shape.
  • the brush bristle material 61 shown in FIG. 4D has a sea-island composite fiber 64 composed of a sea part 62 and an island part 63, and an outer peripheral surface forming part 65 having a predetermined thickness or more composed only of the sea part. 64 cross-sectional shapes are formed in a petal shape or a star shape.
  • sea-island composite fiber 74 composed of a sea part 72 and an island part 73, and an outer peripheral surface forming part 75 having a predetermined thickness or more composed only of the sea part.
  • outer peripheral surface forming part 75 having a predetermined thickness or more composed only of the sea part.
  • the brush bristle material 81 shown in FIG. 5A has a sea-island composite fiber 84 composed of a sea part 82 and island parts 83a and 83b, and an outer peripheral surface forming part 85 composed of only the sea part and having a predetermined thickness or more.
  • the island part is composed of two types of island parts, that is, an island part 83a (circular cross section) and an island part 83b (transverse triangle) having different cross-sectional shapes.
  • the brush bristle material 91 shown in FIG. 5 (B) has a sea-island composite fiber 94 composed of a sea part 92 and an island part 93, and an outer peripheral surface forming part 95 composed of only the sea part and having a predetermined thickness or more. Is formed in a triangular shape. Since all of the exposed islands are composed of islands having a triangular cross section, an excellent dirt scraping effect can be expected.
  • the brush bristle material 101 shown in FIG. 5C has a sea-island composite fiber 104 composed of a sea part 102 and an island part 103, and an outer peripheral surface forming part 105 composed of only the sea part and having a predetermined thickness or more. Is formed in a star shape. Since all of the exposed islands are composed of islands with a star-shaped cross section, an excellent dirt scraping effect can be expected, and the exposed islands have excellent dirt scraping performance and moderate elasticity. Can be held together.
  • the brush bristle material 111 shown in FIG. 5D has a sea-island composite fiber 114 composed of a sea part 112 and an island part 113, and an outer peripheral surface forming part 115 composed of only the sea part and having a predetermined thickness or more.
  • the cross-sectional shape of the portion 113 is formed in a Y shape. In such an exposed island portion having a Y-shaped cross-sectional shape, an excellent dirt scraping effect can be expected, and an effect of favorably retaining the scraped components in a number of exposed island portions can also be expected. Performance suitable for brushes and makeup brushes can be expected.
  • the cross-sectional shape of is formed into a bowl shape.
  • the exposed island portion having such a bowl-shaped cross-sectional shape can be expected to have a softer tactile sensation, and can also be expected to favorably retain the scraped components in a large number of exposed island portions. Performance suitable for a brush can be expected. Further, the brush bristle 131 shown in FIG.
  • the sea-island composite fiber 134 composed of the sea part 132 and the island parts 133a, 133b, and the outer peripheral surface forming part 135 having only a sea part and having a predetermined thickness or more.
  • the island portions are formed on two types of island portions 133a and 133b made of different materials.
  • the sea-island composite fiber in the present invention can take various cross-sectional forms, and can be optimally designed according to the application and intended use.
  • Examples of the present invention will be described below. Examples 1 to 11 and Comparative Example 1 [Production of brush hair]
  • PBT polybutylene terephthalate
  • PET polyethylene terephthalate
  • nylon 610 nylon 610
  • CM2001 nylon 610
  • thermoplastic polyamide elastomer Ny11-PTMG (polytetramethylene glycol)
  • Pebax registered trademark 72R53, manufactured by Arkema
  • PBN polybutylene naphthalate
  • the sea-island type composite fiber is designed so that the sea part, the resin type of the island part, the area ratio between the sea part and the island part, and the number of island parts are as shown in Table 2, and the island part is unevenly distributed near the center of the sea part.
  • the composition of the obtained sea-island composite fiber is shown in Table 2.
  • the above fibers were bundled in a straight line having a bundle diameter of 45 mm and packaged, and then cut into an arbitrary length.
  • the bundle of sea-island composite fibers was immersed in a heated caustic soda solution with both the cut end faces exposed, and both ends were dissolved and removed to expose the islands.
  • the exposed length of the islands was controlled by changing the immersion time in the caustic soda solution.
  • Table 2 shows the characteristics of the obtained brush hair material.
  • Comparative Example 1 a PBT fiber was dipped in a caustic soda solution in the same manner as described above, and a bristle material for a brush having both ends tapered to a taper was produced.
  • the brush bristle material obtained by the above method was set in a flat wire type flocking machine, a predetermined number (about 15 to 40) was picked, and folded into the flock hole of the toothbrush head along with the flat wire and driven. .
  • a predetermined number about 15 to 40
  • As the toothbrush head one having a flocked portion with a diameter of 1.5 mm and 8 rows and 4 columns was used.
  • Table 2 shows the bristle length (mm) and the number of flocks (lines / hole) of the toothbrushes produced in Examples and Comparative Examples.
  • the present invention can be applied to all brushes, and is particularly suitable for toothbrushes, precision cleaning brushes, face washing brushes, makeup brushes, and the like.

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Abstract

Provided is a brush bristle material, wherein island parts are exposed at one end or both ends in the lengthwise direction of a sea-island composite fiber comprising at least two types of resin having different drug dissolution rates, said brush bristle material being characterized in that an outer peripheral surface forming part that forms the outer peripheral surface of the sea-island composite fiber is solely constituted by the sea part, and in that, in a cross-section of the sea-island composite fiber, the island parts in the sea-island composite fiber are unevenly distributed at positions close to the center other than the outer peripheral surface forming part. Further provided is a brush using the brush bristle material. Thus it is possible to provide: a brush bristle material that has an excellent cleaning performance without harming the object being cleaned and also has an excellent durability; and a brush using the brush bristle material.

Description

ブラシ用毛材及びそれを用いたブラシBrush hair material and brush using the same
　本発明は、歯ブラシを含む各種ブラシに好適なブラシ用毛材及びそれを用いたブラシに関する。 The present invention relates to a brush bristle material suitable for various brushes including a toothbrush and a brush using the same.
　従来から、ブラシ用毛材として合成繊維のモノフィラメントを使用する技術が広く知られている。このようなブラシ用毛材を用いたブラシ、例えば歯ブラシにおいては、毛先による歯の清掃効果と、被清掃物を傷つけないだけのソフトな触感や歯ぐき等のマッサージ効果とがバランス良く優れていることが望まれる。 Conventionally, a technique using a monofilament of synthetic fiber as a hair material for a brush is widely known. In a brush using such a brush bristle material, for example, a toothbrush, the effect of cleaning the teeth by the bristles and the effect of massaging such as soft touch and gums that do not damage the object to be cleaned are excellent in a good balance. It is desirable.
　しかし、ブラシ用毛材が毛先まで単一の材質のモノフィラメントで形成されたものでは、このような要求を満たすことが難しいことがある。すなわち、毛先まで単一の材質のモノフィラメントで形成されたものでは、ブラシ用毛材を太くすれば、ブラシの腰も強くなって歯の平坦面に対する清掃効果や歯ぐき等のマッサージ効果は高められるが、逆に、歯間の清掃効果が低下したり、歯ぐき等への触感が強くなりすぎ、歯ぐき等に傷をつけやすくなるおそれがある。 However, when the bristle material for the brush is formed of a monofilament made of a single material up to the hair tip, it may be difficult to satisfy such a requirement. In other words, in the case where the hair ends are made of a monofilament made of a single material, if the brush bristle material is made thicker, the brush becomes stronger and the effect of cleaning the tooth flat surface and the massage effect such as gums are enhanced. However, conversely, the cleaning effect between the teeth may be reduced, or the feeling of touching the gums may become too strong, and the gums may be easily damaged.
　また、毛先まで単一の材質のモノフィラメントで形成されたものにおいて、ブラシ用毛材を細くすれば、歯間の清掃効果は高められるものの、ブラシ用毛材の腰が全長にわたって弱くなり、歯ぐき等のマッサージ効果が低下したり、毛材そのものの耐久性が低下したりするおそれがある。 In addition, if the hair material for the brush is made thin with a single material monofilament up to the bristles, the cleaning effect between the teeth can be enhanced, but the waist of the brush hair material becomes weaker over the entire length, and the gums There is a risk that the massage effect such as, etc. may be reduced, or the durability of the hair material itself may be reduced.
　他の分野における清掃用や洗浄用のブラシにおいても、おおむね同様の問題がある。 清掃 There are almost the same problems in brushes for cleaning and cleaning in other fields.
　そこで、優れた清掃効果と被清掃物を傷つけにくいという特性をバランス良く両立させるために、ブラシ用毛材として海島複合繊維を用い、ブラシに用いられる際の毛材の根元部においては海島成分が一体となった複合繊維構造とし、先端部においては多数の島部を露出、分繊させた構造としたブラシ用毛材が提案されている（特許文献１）。このブラシ用毛材を用いることにより、優れた清掃効果と被清掃物を傷つけにくいという特徴をバランス良く両立させることが可能になり、しかも、露出した先端部の細い島部繊維により、ソフトな触感を得ることが可能になっている。 Therefore, in order to achieve a good balance between the excellent cleaning effect and the property of being hard to damage the object to be cleaned, sea-island composite fibers are used as the bristle material for the brush, and the sea-island component is contained at the base of the bristle when used for the brush. There has been proposed a bristle material for a brush having an integrated composite fiber structure in which a large number of islands are exposed and separated at the tip (Patent Document 1). By using this bristle material for brushes, it is possible to achieve both a good balance between the excellent cleaning effect and the characteristic that the object to be cleaned is hard to be damaged. It is possible to get
　しかしながら、上記特許文献１に提案されたブラシ用毛材には、以下のような問題が残されている。すなわち、ブラシ用毛材として用いる海島複合繊維の横断面の全領域にわたって島部が分布されており、その島部が毛材の先端部において露出されている構造であるため、実際に歯ブラシ等に使用した場合、露出した島部に摩擦等による外力が加わったとき、外力の大きさによってはその露出した島部を毛材根元部で支えている海部が裂ける可能性があり、耐久性が不十分になるおそれがあるという問題が残されている。 However, the brush bristle material proposed in Patent Document 1 still has the following problems. That is, the islands are distributed over the entire cross-sectional area of the sea-island composite fiber used as the bristle material for the brush, and the islands are exposed at the tip of the bristle material. When used, when an external force due to friction or the like is applied to the exposed island, depending on the magnitude of the external force, the sea that supports the exposed island with the base of the bristle material may be torn, and durability is not good. The problem remains that it may be sufficient.
　ところで、上記のような従来のブラシ用毛材に関する問題とは別に、最近、島部の分布状態や島部の横断面形状を種々の形態に形成可能な海島複合繊維の製造技術が提案されている（特許文献２～４）。この提案技術によれば、海島複合繊維において、海部に対する島部の大きさや配置、断面形状、配置密度等を実質的に自由に設計することが可能になり、各種分野における各種要求に応えることが可能になると、大きな期待を寄せられている。 By the way, apart from the problems related to the conventional brush bristle material as described above, recently, a technology for producing sea-island composite fibers capable of forming the distribution state of the island part and the cross-sectional shape of the island part into various forms has been proposed. (Patent Documents 2 to 4). According to this proposed technology, in the island-island composite fiber, it is possible to substantially freely design the size, arrangement, cross-sectional shape, arrangement density, etc. of the island part with respect to the sea part and meet various requirements in various fields. When it becomes possible, there are great expectations.
特開平３－９９６０４号公報Japanese Patent Laid-Open No. 3-99604 特開２０１１－１７４２１５号公報JP 2011-174215 A 特開２０１２－１２７０２２号公報JP 2012-127002 A 特開２０１３－１４８７２号公報JP 2013-14872 A
　そこで本発明の課題は、従来の特許文献１に記載されているようなブラシ用毛材の優れた特徴と残された問題点に着目するとともに、最近提案された主として島部を実質的に自由に設計可能な海島複合繊維の製造技術に着目し、被清掃物を傷つけず、優れた清掃性を兼ね備え、しかも優れた耐久性を有するブラシ用毛材と、それを用いたブラシを提供することにある。 Therefore, the object of the present invention is to pay attention to the excellent features and remaining problems of the bristle material for brush as described in the conventional patent document 1, and to substantially free the island part which has been proposed recently. Focusing on the manufacturing technology of sea-island composite fibers that can be designed in a simple manner, providing a brush hair material that has excellent durability and has excellent cleaning properties without damaging the object to be cleaned, and a brush using the same It is in.
　上記課題を解決するために、本発明に係るブラシ用毛材は、薬剤溶解速度の異なる２種類以上の樹脂からなる海島複合繊維の長手方向一端部または両端部における島部が露出されたブラシ用毛材であって、前記海島複合繊維の外周面を形成する外周面形成部が海部のみで構成されており、該海島複合繊維の島部が、該海島複合繊維の横断面において、前記外周面形成部以外の中央部寄りの部位に偏在されていることを特徴とするものからなる。 In order to solve the above-described problems, a brush hair material according to the present invention is for a brush in which islands at one or both longitudinal ends of sea-island composite fibers made of two or more types of resins having different drug dissolution rates are exposed. An outer peripheral surface forming portion that is a bristle material and forms an outer peripheral surface of the sea-island composite fiber is composed only of a sea part, and the island part of the sea-island composite fiber is the outer peripheral surface in a cross section of the sea-island composite fiber. It consists of what is characterized by being unevenly distributed in the site | parts near the center part other than a formation part.
　このような本発明に係るブラシ用毛材においては、海島複合繊維の長手方向一端部または両端部（後述の如く、ブラシ用毛材がブラシに使用される際、毛材の一端部が毛先になる場合と両端部が毛先になる場合の両方がある。）における島部が露出されたブラシ用毛材構造とされることにより、被清掃物に直接接触するのは実質的に毛材先端部に露出されている複合繊維の細い島部のみとなり、その島部が根元部で複合繊維の海部に支持される形態となるので、比較的腰の弱い多数の露出島部によって毛先が構成されて、例えば歯間等の清掃しにくい細かい部位に対しても優れた清掃性が発現され、かつ、被清掃物に接触するのが腰の弱い露出島部であることから、被清掃物は傷つけられにくく、ソフトな触感が得られる。また、被清掃物に直接接触するのが複数の(多数の) 細い島部のみであることから、被清掃部位に対し、汚れを掻き出すだけでなく、絡め取る機能も発揮でき、一層優れた清掃性の発現が可能である。そして、海島複合繊維の外周面を形成する外周面形成部が海部のみで構成され、かつ、海島複合繊維の島部が、該海島複合繊維の横断面において、海島複合繊維の横断面において、外周面形成部以外の中央部寄りの部位に偏在されていることにより、外周面形成部直近の島部は、上記露出島部の根元部およびその近傍部位（複合繊維側の部位）において、ある厚み以上の外周面形成部を形成する海部に覆われることになり、露出島部に外力が加わった場合に、その外力に起因して露出島部を支えている海部が裂けることが防止され、ブラシ用毛材の耐久性が大幅に向上される。換言すれば、海島複合繊維の島部が、該海島複合繊維の横断面において、ある厚み以上の海部で形成される外周面形成部以外の中央部寄りの部位に偏在されることになり、その偏在された島部が毛材先端部で露出された形態とされるので、露出島部による、被清掃物を傷つけにくく、優れた清掃効果が得られるという利点が活かされつつ、ある厚み以上の海部からなる外周面形成部による優れた耐久性が実現される。 In such a bristle material for a brush according to the present invention, one end or both ends in the longitudinal direction of the sea-island composite fiber (when the bristle material for a brush is used for a brush as described later, one end of the bristle is And both ends become bristles.) The bristle structure for brushes in which the islands are exposed, so that it is substantially the bristle that is in direct contact with the object to be cleaned. Since only the thin island part of the composite fiber exposed at the tip part is formed, and the island part is supported by the sea part of the composite fiber at the root part, the hair tips are formed by many exposed island parts that are relatively weak. Constructed, for example, excellent cleanliness is expressed even for fine parts that are difficult to clean, such as between teeth, and the object to be cleaned is in contact with the object to be cleaned is a weakly exposed island part. Is hard to damage and gives a soft touch. In addition, since only a plurality of (many) thin islands are in direct contact with the object to be cleaned, it not only scratches the area to be cleaned, but also exhibits a function of entwining it, making it even better cleaning Sexual expression is possible. And the outer peripheral surface forming part that forms the outer peripheral surface of the sea-island composite fiber is composed of only the sea part, and the island part of the sea-island composite fiber is the outer periphery in the cross-section of the sea-island composite fiber, By being unevenly distributed in a portion near the center other than the surface forming portion, the island portion closest to the outer peripheral surface forming portion has a certain thickness at the root portion of the exposed island portion and the vicinity thereof (site on the composite fiber side). When an external force is applied to the exposed island part, the sea part supporting the exposed island part is prevented from tearing due to the external force when the outer part forming the outer peripheral surface forming part is covered, and the brush The durability of the hair material is greatly improved. In other words, the island part of the sea-island composite fiber is unevenly distributed in a region near the center other than the outer peripheral surface forming part formed by the sea part having a certain thickness or more in the cross section of the sea-island composite fiber, Since the unevenly distributed island portion is exposed at the tip of the hair material, it is difficult to damage the object to be cleaned by the exposed island portion, and the advantage that an excellent cleaning effect can be obtained is utilized, and more than a certain thickness Excellent durability is realized by the outer peripheral surface forming portion made of the sea portion.
　上記本発明に係るブラシ用毛材において、上記外周面形成部による優れた耐久性をより確実に発現させるためには、外周面形成部を構成する海部の厚みがその優れた耐久性を発現させるに十分な値以上であることが好ましい。これを達成するためには、上記海島複合繊維の横断面における、上記外周面形成部直近の島部の径Ｄｉと上記外周面形成部の海部の厚みＴｓとの比率Ｔｓ／Ｄｉが１．２以上であることが好ましい。これによって、所定厚み以上の海部からなる外周面形成部による優れた耐久性がより確実に実現される。Ｔｓ／Ｄｉは、好ましくは１．５以上、より好ましくは２．０以上である。 In the bristle material for brushes according to the present invention, in order to more reliably express the excellent durability due to the outer peripheral surface forming portion, the thickness of the sea part constituting the outer peripheral surface forming portion expresses the excellent durability. It is preferable that it is more than a sufficient value. In order to achieve this, the ratio Ts / Di between the diameter Di of the island part immediately adjacent to the outer peripheral surface forming part and the thickness Ts of the sea part of the outer peripheral surface forming part in the cross section of the sea-island composite fiber is 1.2. The above is preferable. As a result, excellent durability due to the outer peripheral surface forming portion composed of the sea portion having a thickness greater than or equal to the predetermined thickness is more reliably realized. Ts / Di is preferably 1.5 or more, more preferably 2.0 or more.
　また、上記本発明に係るブラシ用毛材において、上記海島複合繊維の長手方向一端部または両端部に露出された島部の露出長さとしては、０．５～１０ｍｍの範囲にあることが好ましく、より好ましくは、１～５ｍｍの範囲である。島部の露出長さが０．５ｍｍよりも短いと、露出島部による歯間等の細かい部位に対する優れた清掃性が得られにくく、また、良好なソフトな触感も得られにくい。島部の露出長さが１０ｍｍよりも長いと、腰の弱い露出島部が長くなりすぎるおそれがあり、露出島部が変形しすぎて露出島部による清掃効果(例えば、汚れを絡め取る効果)や、歯ぐき等のマッサージ効果が不足するおそれが生じる。 In the bristle material for brushes according to the present invention, the exposed length of the island portion exposed at one or both ends in the longitudinal direction of the sea-island composite fiber is preferably in the range of 0.5 to 10 mm. More preferably, it is in the range of 1 to 5 mm. When the exposed length of the island portion is shorter than 0.5 mm, it is difficult to obtain an excellent cleaning property for fine parts such as a space between the exposed island portions, and it is difficult to obtain a good soft touch. If the exposed length of the island portion is longer than 10 mm, the exposed island portion with a weak waist may become too long, and the exposed island portion is deformed too much, and the cleaning effect by the exposed island portion (for example, the effect of entwining dirt) In addition, the massage effect such as gums may be insufficient.
　また、上記本発明に係るブラシ用毛材においては、上記島部の径は、とくに、外周面形成部直近の島部の径Ｄｉは１～２０μｍの範囲にあることが好ましく、より好ましくは、１～１０μｍの範囲である。この島部の径が１μｍ未満であると、露出島部が細くなりすぎ露出島部の腰が弱くなりすぎて、清掃に必要な露出島部の腰が得られにくくなるおそれがある。島部の径が２０μｍよりも大きくなると、露出島部の腰が強くなりすぎて、歯間等の細かい部位に対する優れた清掃性が得られにくくなり、また、ソフトな触感も得られにくくなるおそれがある。なお、本発明において、島部の径とは、島部の横断面形状が円形の場合にはその直径、円形以外の異形横断面形状の場合には外接円の直径をいう。後述の海島複合繊維の径についても同様とする。なお、この島部の径に関しては、全ての島部が同一の太さでなくてもよい。 In the bristle material for brushes according to the present invention, the diameter of the island part is preferably in the range of 1 to 20 μm, more preferably the diameter Di of the island part immediately adjacent to the outer peripheral surface forming part, It is in the range of 1 to 10 μm. If the diameter of this island portion is less than 1 μm, the exposed island portion becomes too thin and the exposed island portion becomes too weak, and it may be difficult to obtain the exposed island portion necessary for cleaning. If the diameter of the island portion is larger than 20 μm, the exposed island portion becomes too strong, and it becomes difficult to obtain excellent cleaning properties for fine parts such as between teeth, and it is also difficult to obtain a soft tactile sensation. There is. In the present invention, the diameter of the island portion means the diameter when the cross-sectional shape of the island portion is circular, and the diameter of the circumscribed circle when the cross-sectional shape is other than circular. The same applies to the diameter of the sea-island composite fiber described later. In addition, regarding the diameter of this island part, all the island parts may not be the same thickness.
　また、上記海島複合繊維の横断面における上記島部の数としては、２０以上であることが好ましい。したがって、１本のブラシ用毛材を形成する海島複合繊維の長手方向一端部または両端部に露出される島部の数も２０以上であることが好ましい。この島部の数を２０以上とすることにより、露出島部により汚れを絡め取りやすくなり、清掃性がより向上されるとともに、化粧料等を保持する性能や泡立ち性能等が求められる場合にも、それら性能を発揮しやすくなる。 Further, the number of the island portions in the cross section of the sea-island composite fiber is preferably 20 or more. Therefore, it is preferable that the number of island portions exposed at one or both ends in the longitudinal direction of the sea-island composite fiber forming one brush hair material is 20 or more. By setting the number of islands to 20 or more, it becomes easier to entangle dirt by the exposed islands, and the cleaning property is further improved, and also when the performance of retaining cosmetics, foaming performance, etc. is required. , It will be easier to demonstrate their performance.
　また、上記本発明に係るブラシ用毛材において、上記海島複合繊維の径は、５０～１，０００μｍの範囲にあることが好ましく、より好ましくは、８０～５００μｍの範囲である。海島複合繊維の径が５０μｍ未満であると、ブラシに使用される際の海島複合繊維部自身の腰が弱くなりすぎ、用途によっては清掃効果が低下するおそれがある。海島複合繊維の径が１，０００μｍを超えると、ブラシに使用される際の海島複合繊維部自身の腰が強くなりすぎ、先端部の露出島部の形態(長さや径)にもよるが、露出島部の根元部における海島複合繊維部が被清掃物側に強く押し付けられて被清掃物を傷つけやすくなるおそれがある。 In the bristle material for brushes according to the present invention, the diameter of the sea-island composite fiber is preferably in the range of 50 to 1,000 μm, and more preferably in the range of 80 to 500 μm. If the diameter of the sea-island composite fiber is less than 50 μm, the waist of the sea-island composite fiber part itself when used for a brush becomes too weak, and the cleaning effect may be lowered depending on the application. When the diameter of the sea-island composite fiber exceeds 1,000 μm, the waist of the sea-island composite fiber part itself when used for a brush becomes too strong, depending on the form (length and diameter) of the exposed island part at the tip part. There is a possibility that the sea-island composite fiber portion at the root portion of the exposed island portion is strongly pressed against the object to be cleaned and easily damages the object to be cleaned.
　また、本発明に係るブラシ用毛材において、上記海島複合繊維を構成する樹脂種としては、薬剤溶解速度の異なる２種類以上の樹脂からなる限り特に限定されず、例えば、上記海島複合繊維の海部がポリエステル系樹脂からなり、島部が該ポリエステル系樹脂よりも薬剤溶解速度が遅い樹脂からなる形態を例示できる。より具体的には、海部がポリブチレンテレフタレート、島部がナイロン(登録商標)からなる形態や、海部がポリエチレンテレフタレート、島部がポリブチレンテレフタレートからなる形態を例示できる。 Moreover, in the bristle material for brushes according to the present invention, the resin species constituting the sea-island composite fiber is not particularly limited as long as it is composed of two or more types of resins having different drug dissolution rates. For example, the sea part of the sea-island composite fiber Is made of a polyester resin, and the island part can be exemplified by a resin having a slower drug dissolution rate than the polyester resin. More specifically, a form in which the sea part is made of polybutylene terephthalate and the island part is made of nylon (registered trademark), and a form in which the sea part is made of polyethylene terephthalate and the island part is made of polybutylene terephthalate can be exemplified.
　また、本発明に係るブラシ用毛材においては、上記海島複合繊維の横断面形状は実質的に任意の形状に設定することが可能であり、横断面形状が円形に形成されている形態の他、円形以外の異形断面形状(例えば、三角形や四角形等の多角形、多葉形など)に形成されている形態のいずれも採用できる。この横断面形状は、用途や使用目的に応じて設定できる。また、複数種の横断面形状が混在した使用形態も可能である。 In the bristle material for a brush according to the present invention, the cross-sectional shape of the sea-island composite fiber can be set to an arbitrary shape, and the cross-sectional shape is formed in a circular shape. Any of the shapes formed in irregular cross-sectional shapes other than a circle (for example, a polygon such as a triangle or a quadrangle, a multileaf shape, etc.) can be employed. This cross-sectional shape can be set according to the application and intended use. Further, a usage form in which a plurality of types of cross-sectional shapes are mixed is also possible.
　また、上記海島複合繊維の島部の横断面形状についても、同様に、実質的に任意の形状に設定することが可能であり、横断面形状が円形に形成されている形態の他、円形以外の異形断面形状(例えば、三角形や四角形等の多角形、Ｙ形など)に形成されている形態のいずれも採用できる。この横断面形状も、用途や使用目的に応じて設定できる。また、複数種の横断面形状が混在した形態も可能である。 In addition, the cross-sectional shape of the island part of the sea-island composite fiber can be set to a substantially arbitrary shape in the same manner. Any of the shapes formed in the irregular cross-sectional shape (for example, a polygon such as a triangle or a quadrangle, a Y shape, etc.) can be adopted. This cross-sectional shape can also be set according to the application and intended use. Moreover, the form in which multiple types of cross-sectional shapes were mixed is also possible.
　また、本発明に係るブラシ用毛材においては、上記海島複合繊維の端部(一端部または両端部)において露出された島部の先端部を先細りテーパー形状に形成することもでき、海島複合繊維中の島部の横断面形状を露出島部の先端部まで実質的に維持させた形状に形成することもできる。露出島部の先端部を先細りテーパー形状に形成する形態は、例えば、溶解用薬剤に対して海部をより溶解速度の速い樹脂で構成し、島部をより溶解速度の遅い樹脂で構成することによって達成できる。島部の横断面形状を露出島部の先端部まで実質的に維持させた形状に形成する形態は、例えば、海部のみ溶解用薬剤に対して溶解する樹脂で構成し、島部を該薬剤に対しては溶解しない樹脂で構成することによって達成できる。 Further, in the bristle material for brushes according to the present invention, the tip of the island part exposed at the end part (one end part or both end parts) of the sea-island composite fiber can be tapered to form a sea-island composite fiber. It is also possible to form a shape in which the cross-sectional shape of the inner island portion is substantially maintained up to the tip of the exposed island portion. The form in which the tip of the exposed island portion is tapered and tapered is formed by, for example, configuring the sea portion with a resin having a higher dissolution rate and a island portion with a resin having a lower dissolution rate with respect to the drug for dissolution. Can be achieved. The form in which the cross-sectional shape of the island part is formed into a shape that is substantially maintained up to the tip of the exposed island part is, for example, constituted by a resin that dissolves only in the sea part in the medicine for dissolution, and the island part is used as the medicine. On the other hand, it can be achieved by comprising a resin that does not dissolve.
　さらに、本発明に係るブラシ用毛材においては、上記海島複合繊維が互いに異なる材質の島部を有することも可能である。さらにまた、互いに異なる複数の横断面サイズの島部を有する形態とすることも可能である。このように複数種の島部を有することによって、複数の機能を併せ持たせることが可能になる。 Furthermore, in the bristle material for brushes according to the present invention, the sea-island composite fiber may have island parts made of different materials. Furthermore, it is also possible to have a form having a plurality of island portions having different cross-sectional sizes. Thus, by having a plurality of types of islands, it is possible to have a plurality of functions.
　本発明は、上記のような本発明に係るブラシ用毛材が少なくとも一部に使用されているブラシについても提供する。とくに、本発明に係るブラシは、上述したような被清掃物を傷つけず、優れた清掃性を兼ね備え、かつ耐久性に優れており、しかもソフトな触感が得られる毛材が使用されるので、特に歯ブラシ、精密洗浄用のブラシ、洗顔ブラシ、化粧ブラシ等として好適である。 The present invention also provides a brush in which the brush hair material according to the present invention as described above is used at least in part. In particular, the brush according to the present invention uses a bristle material that does not damage the object to be cleaned as described above, has excellent cleaning properties, is excellent in durability, and provides a soft touch. It is particularly suitable as a toothbrush, precision cleaning brush, face washing brush, makeup brush, and the like.
　このような本発明に係るブラシにおいては、その用途にもよるが、好ましいブラシの毛丈(ブラシ根元から毛先までの長さ) の範囲として、１～５０ｍｍの範囲が例示され、より好ましくは、５～３５ｍｍの範囲である。 In such a brush according to the present invention, although it depends on its use, a range of 1 to 50 mm is exemplified as a preferable range of bristle length (length from the brush root to the bristles), more preferably The range is 5 to 35 mm.
　このように、本発明によれば、被清掃物を傷つけず、優れた清掃性を兼ね備え、しかも優れた耐久性を有するブラシ用毛材を提供することができる。 Thus, according to the present invention, it is possible to provide a brush bristle material that does not damage the object to be cleaned, has excellent cleaning properties, and has excellent durability.
　また、本発明によれば、上記のようなブラシ用毛材を少なくとも一部に使用した各種ブラシを提供でき、特に歯ブラシ、精密洗浄用のブラシ、洗顔ブラシ、化粧ブラシ等として好適なブラシを提供することができる。 In addition, according to the present invention, it is possible to provide various brushes using at least a part of the bristle material for brushes as described above. In particular, brushes suitable as toothbrushes, precision cleaning brushes, face washing brushes, makeup brushes, etc. are provided. can do.
本発明の一実施形態に係るブラシ用毛材を示しており、図１（Ａ）は毛材の一端部の概略側面図、図１（Ｂ）は図１（Ａ）のＢ－Ｂ線に沿う概略横断面図である。1 shows a bristle material for a brush according to an embodiment of the present invention, FIG. 1 (A) is a schematic side view of one end of the bristle material, and FIG. 1 (B) is a BB line in FIG. 1 (A). FIG. ブラシ用毛材を歯ブラシに使用する際の植毛方法を示す概略構成図である。It is a schematic block diagram which shows the flocking method at the time of using the bristle material for brushes for a toothbrush. 本発明の別の実施形態に係るブラシ用毛材の一端部の概略側面図である。It is a schematic side view of the one end part of the bristle material for brushes concerning another embodiment of the present invention. 本発明に係るブラシ用毛材の各種形態例を示す概略横断面図である。It is a schematic cross-sectional view which shows the various form examples of the bristle material for brushes concerning this invention. 本発明に係るブラシ用毛材のさらに別の各種形態例を示す概略横断面図である。It is a schematic cross-sectional view which shows another various form example of the bristle material for brushes concerning this invention.
　以下に、本発明の実施の形態について、図面を参照しながら説明する。
　図１は、本発明の一実施形態（実施形態１）に係るブラシ用毛材１を示しており、図１（Ａ）は該毛材１の一端部を示している。ブラシ用毛材１は、図１（Ｂ）に示すように、薬剤溶解速度の異なる２種類以上の樹脂(図示例では２種類の樹脂)で構成された、海部２と島部３からなる横断面形状が円形の海島複合繊維４から形成されており、海島複合繊維４の長手方向一端部または両端部における島部３（図１（Ａ）は該毛材１の一端部のみを示している。）が露出されたブラシ用毛材として構成されている（以下、露出された島部３の部分を露出島部３ａと表示する）。このブラシ用毛材１においては、図１（Ｂ）に示すように、海島複合繊維４の外周面を形成する外周面形成部５が海部２のみで構成されており、該海島複合繊維４の島部３が、該海島複合繊維４の横断面において、外周面形成部５以外の中央部寄りの部位に、該中央部寄りの部位の全領域にわたって偏在されている。とくに本実施形態では、海島複合繊維４の横断面における、外周面形成部５直近の島部３の径Ｄｉと外周面形成部５の海部２の厚みＴｓとの比率Ｔｓ／Ｄｉが１．２以上となるように、海島複合繊維４が作製されている。このような形態の海島複合繊維４は、前述した特許文献２～４に記載の、海部に対する島部の大きさや配置、断面形状、配置密度等を実質的に自由に設計することが可能な技術を用いて、意図的に作製することができる。あるいは、従来公知の、いわゆるパイプ型の海島複合口金（島成分をパイプ群によって微細に分割し、海成分中に所定状態で分布させるようにした口金）を用いて海島複合繊維４を作製することも可能である。但し、前述した特許文献２～４に記載の技術を用いる方が、より容易にかつより高精度に目標とする海島複合繊維４を作製することができる。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a bristle material 1 for a brush according to an embodiment (Embodiment 1) of the present invention, and FIG. 1 (A) shows one end of the bristle material 1. As shown in FIG. 1 (B), the brush bristle material 1 is composed of two or more kinds of resins (two kinds of resins in the illustrated example) having different drug dissolution rates, and includes a sea part 2 and an island part 3. The island shape 3 is formed from one end or both ends in the longitudinal direction of the sea-island composite fiber 4 (FIG. 1A shows only one end of the bristle material 1). .) Is configured as an exposed brush hair material (hereinafter, the exposed island portion 3 is referred to as an exposed island portion 3a). In this bristle material 1 for brushes, as shown in FIG. 1 (B), the outer peripheral surface forming part 5 that forms the outer peripheral surface of the sea-island composite fiber 4 is composed of only the sea part 2, and the sea-island composite fiber 4 In the cross section of the sea-island composite fiber 4, the island part 3 is unevenly distributed in the region near the center other than the outer peripheral surface forming part 5 over the entire region near the center. In particular, in this embodiment, the ratio Ts / Di between the diameter Di of the island portion 3 immediately adjacent to the outer peripheral surface forming portion 5 and the thickness Ts of the sea portion 2 of the outer peripheral surface forming portion 5 in the cross section of the sea-island composite fiber 4 is 1.2. The sea-island composite fiber 4 is produced as described above. The sea-island composite fiber 4 having such a form is a technique that can be designed substantially freely in terms of the size, arrangement, cross-sectional shape, arrangement density, etc. of the island part relative to the sea part, as described in Patent Documents 2 to 4 described above. Can be intentionally produced. Alternatively, the sea-island composite fiber 4 is produced using a conventionally known so-called pipe-type sea-island composite base (a base in which island components are finely divided by a group of pipes and distributed in a predetermined state in the sea component). Is also possible. However, the target sea-island composite fiber 4 can be produced more easily and with higher accuracy by using the techniques described in Patent Documents 2 to 4.
　海島複合繊維４の長手方向端部における露出島部３ａは、例えば次のように形成される。海島複合繊維４は、薬剤溶解速度（例えば、アルカリ処理による溶解速度）の異なる、海部２形成用樹脂と島部３形成用樹脂の２種類の樹脂で構成されるので、例えば、海部２をアルカリで溶解されるポリエステル系樹脂としてのポリブチレンテレフタレート（ＰＢＴ）で形成し、島部３をアルカリでは溶解されない樹脂としてのナイロン（Ｎｙ）（登録商標）で形成して、その海島複合繊維４の長手方向端部を所定長だけアルカリ処理してその端部部分の海部２のみ溶解させることにより、図１（Ａ）に示すような、露出島部３ａを有するブラシ用毛材１の端部部分が形成される。アルカリ処理を行って海部２のみ溶解させ、溶解しない島部３を残す処理の上記所定長が、露出島部３ａの露出長さとなる。この露出長さは、前述の如く、０．５～１０ｍｍの範囲にあることが好ましい。 The exposed island portion 3a at the longitudinal end of the sea-island composite fiber 4 is formed as follows, for example. Since the sea-island composite fiber 4 is composed of two types of resins, namely, a sea part 2 forming resin and an island part 3 forming resin, which have different drug dissolution rates (for example, dissolution rate by alkali treatment), for example, the sea part 2 is made alkaline. Formed with polybutylene terephthalate (PBT) as a polyester-based resin that is dissolved in, and the island 3 is formed with nylon (Ny) (registered trademark) as a resin that is not dissolved with an alkali. The end portion of the brush bristle material 1 having the exposed island portion 3a as shown in FIG. 1 (A) is obtained by subjecting the directional end portion to alkali treatment by a predetermined length and dissolving only the sea portion 2 at the end portion. It is formed. The above-mentioned predetermined length of the process of performing the alkali treatment to dissolve only the sea part 2 and leaving the island part 3 not dissolved is the exposed length of the exposed island part 3a. As described above, this exposed length is preferably in the range of 0.5 to 10 mm.
　また、本実施形態では、露出島部３ａは、例えばアルカリ処理では溶解しない樹脂から構成されているので、海部２の溶解により露出された後にも、海島複合繊維４中での島部３の形状がそのまま残され、露出島部３ａは、その根元部から先端部まで同じ横断面形状に形成されている。また、本実施形態では、海島複合繊維４の横断面形状、島部３の横断面形状は共に円形に形成されているが、前述したように円形以外の異形横断面形状にすることも可能である。また、海島複合繊維４における島部３の径、とくに外周面形成部５直近の島部３の径Ｄｉの好ましい範囲、海島複合繊維４の横断面における島部３の数の好ましい範囲、海島複合繊維４の径の好ましい範囲については前述した通りである。 Moreover, in this embodiment, since the exposed island part 3a is comprised from the resin which is not melt | dissolved, for example by an alkali process, even after exposed by melt | dissolution of the sea part 2, the shape of the island part 3 in the sea-island composite fiber 4 Is left as it is, and the exposed island portion 3a is formed in the same cross-sectional shape from the root portion to the tip portion. In this embodiment, the cross-sectional shape of the sea-island composite fiber 4 and the cross-sectional shape of the island part 3 are both formed in a circular shape. However, as described above, it is also possible to have an irregular cross-sectional shape other than a circular shape. is there. Further, the preferred range of the diameter of the island portion 3 in the sea-island composite fiber 4, in particular, the diameter Di of the island portion 3 immediately adjacent to the outer peripheral surface forming portion 5, the preferred range of the number of the island portions 3 in the cross section of the sea-island composite fiber 4, The preferable range of the diameter of the fiber 4 is as described above.
　上記のように構成されたブラシ用毛材１が、各種ブラシの作製のために少なくとも一部に使用される。一般に、ブラシ用毛材をブラシ構成部材に植毛する際の方法として、代表的に二種の方法が知られているが、これら二種の方法を、歯ブラシへの使用の場合を例にとって、図２を参照しながら説明する。 The brush bristle material 1 configured as described above is used at least in part for the production of various brushes. In general, as a method for flocking a brush bristle material on a brush component, two types of methods are typically known, but these two types of methods are illustrated with reference to the case of use in a toothbrush as an example. This will be described with reference to FIG.
　図２（Ａ）は、ブラシ用毛材１１が歯ブラシ構成部材１２のヘッド部に植毛された歯ブラシ１３を示しており、このブラシ用毛材１１の植毛方法として、図２（Ａ）のａ－ａ線に沿う拡大断面図である図２（Ｂ）、（Ｃ）に示すような二種の方法がある。図２（Ｂ）に示す方法では、植毛穴１４に二つ折りにしたブラシ用毛材１１を差し込み、平線１５と称されている固定具でブラシ用毛材１１を歯ブラシ構成部材１２に固定する。完成された歯ブラシは、通常、平線歯ブラシと呼ばれている。このような平線歯ブラシでは、予め作製されたブラシ用毛材１１の両端部がブラシの毛先となる。図２（Ｃ）に示す方法では、歯ブラシ構成部材１２のヘッド部表面側部材１２ａの貫通穴１６にブラシ用毛材１１の一端部を挿通させ、挿通されたブラシ用毛材１１の端部に加熱装置(図示略)を当てて焼玉１７と称されている抜け防止あるいは固定用の塊を形成し、しかる後に、ヘッド部裏面側部材１２ｂを接合し焼玉１７を隠して歯ブラシ商品を完成させる。完成された歯ブラシは、通常、無平線歯ブラシと呼ばれている。このような無平線歯ブラシでは、予め作製されたブラシ用毛材１１の一端部がブラシの毛先となる。したがって、本発明に係るブラシ用毛材１が平線歯ブラシに使用される場合には、上述した露出島部３ａはブラシ用毛材１の両端部に形成されることになり、無平線歯ブラシに使用される場合には、露出島部３ａはブラシ用毛材１の一端部に形成されることになる。 FIG. 2 (A) shows a toothbrush 13 in which the brush bristle material 11 is planted on the head part of the toothbrush constituting member 12. As a method for planting the brush bristle material 11, FIG. 2 (A) a- There are two types of methods as shown in FIGS. 2B and 2C which are enlarged cross-sectional views along the a line. In the method shown in FIG. 2 (B), the brush bristle material 11 folded in half is inserted into the flock hole 14 and the brush bristle material 11 is fixed to the toothbrush component 12 with a fixture called a flat wire 15. . The completed toothbrush is usually called a flat wire toothbrush. In such a flat toothbrush, both ends of the brush bristle material 11 prepared in advance are the bristles of the brush. In the method shown in FIG. 2 (C), one end portion of the brush bristle material 11 is inserted into the through hole 16 of the head surface side member 12a of the toothbrush constituting member 12, and the end portion of the brush bristle material 11 thus inserted is inserted. A heating device (not shown) is applied to form a lump for preventing or fixing called a roasted ball 17, and after that, the head portion back side member 12b is joined to conceal the roasted ball 17 to complete a toothbrush product. Let The completed toothbrush is usually called a flat wire toothbrush. In such a flat wire toothbrush, one end of the brush bristle material 11 prepared in advance serves as a brush tip. Therefore, when the bristle material 1 for brushes according to the present invention is used for a flat wire toothbrush, the exposed island portions 3a described above are formed at both ends of the bristle material 1 for brushes, and a flat wire toothbrush. In this case, the exposed island portion 3 a is formed at one end of the brush bristle material 1.
　上記実施形態に係るブラシ用毛材１を使用したブラシにおいては、前述したように、毛材端部に細い露出島部３ａが存在する構造により、比較的腰の弱い多数の露出島部３ａによって被清掃物に接触する毛先が構成されて、被清掃物が傷つけられにくくなり、ソフトな触感が得られるとともに、歯間等の清掃しにくい細かい部位に対しても優れた清掃性(優れた汚れの掻き出し性能、汚れの絡め取り性能)が発現される。そして、海島複合繊維４の島部３が、該海島複合繊維４の横断面において、外周面形成部５以外の中央部寄りの部位に偏在されていることにより、とくに、海島複合繊維４の外周面を形成する、海部２のみで構成された外周面形成部５の厚みＴｓと外周面形成部直近の島部３の径Ｄｉとの比率Ｔｓ／Ｄｉが１．２以上とされることにより、外周面形成部直近の島部３は、ひいては、露出島部３ａはその根元部で、十分な厚みの海部２で覆われた状態で支持されることになり、露出島部３ａに外力が繰り返し加わる場合にも、その外力に起因して露出島部３ａを支えている海部２が裂けることが防止され、高いブラシ用毛材１の耐久性が実現される。 In the brush using the bristle material 1 for brushes according to the above-described embodiment, as described above, due to the structure in which the thin exposed island portion 3a is present at the end of the bristle material, a large number of exposed island portions 3a having relatively low waists are used. The tip of the hair that comes into contact with the object to be cleaned is configured, the object to be cleaned is less likely to be damaged, a soft tactile sensation is obtained, and excellent cleaning performance (excellent for fine parts that are difficult to clean, such as between teeth) Dirt scraping performance, dirt entwining performance). And since the island part 3 of the sea-island composite fiber 4 is unevenly distributed in the site | part near the center part other than the outer peripheral surface formation part 5 in the cross section of this sea-island composite fiber 4, especially the outer periphery of the sea-island composite fiber 4 By forming the ratio Ts / Di between the thickness Ts of the outer peripheral surface forming part 5 formed only by the sea part 2 and the diameter Di of the island part 3 immediately adjacent to the outer peripheral surface forming part to be 1.2 or more, The island part 3 immediately adjacent to the outer peripheral surface forming part, as a result, the exposed island part 3a is supported at the base part of the island part 3 covered with the sea part 2 having a sufficient thickness, and external force is repeatedly applied to the exposed island part 3a. Also when added, it is prevented that the sea part 2 supporting the exposed island part 3a is torn due to the external force, and high durability of the bristle material 1 for a brush is realized.
　図３は、本発明の別の実施形態（実施形態２）に係るブラシ用毛材２１の一端部を示している。本実施形態においては、ブラシ用毛材２１の端部において海島複合繊維２２から露出された露出島部２３は、その先端部が先細りテーパー形状に形成されている。このような形態のブラシ用毛材２１は、例えば、溶解用薬剤としてのアルカリに対して海部をより溶解速度の速い樹脂(例えば、ポリエチレンテレフタレート（ＰＥＴ）)、島部をより溶解速度の遅い樹脂(例えば、ポリブチレンテレフタレート（ＰＢＴ）)で構成することによって達成できる。このようにすれば、露出島部２３が形成される部分におけるアルカリ処理により露出島部２３周りの海部が速い溶解速度によって除去され、露出島部２３は残されるもののアルカリ処理により遅い溶解速度によって徐々に溶解され、先細りテーパー形状に形成される。また、この海島複合繊維２２の端部におけるアルカリ処理の影響を受けて、露出島部２３に接続されて残される部位の海島複合繊維２２の肩部には、図示の如く丸みが付けられ、より滑らかな形状となる。 FIG. 3 shows one end portion of a brush bristle material 21 according to another embodiment (Embodiment 2) of the present invention. In the present embodiment, the exposed island portion 23 exposed from the sea-island composite fiber 22 at the end portion of the bristle material 21 for the brush is formed with a tapered shape at the tip end portion. The brush bristle material 21 having such a form is, for example, a resin (for example, polyethylene terephthalate (PET)) having a faster dissolution rate in the sea than an alkali as a dissolving agent, and a resin having a slower dissolution rate in the island. (For example, polybutylene terephthalate (PBT)). In this way, the sea around the exposed island 23 is removed by the alkali treatment at the portion where the exposed island 23 is formed, and the exposed island 23 remains, but the exposed island 23 is gradually removed by the slow dissolution due to the alkali treatment. And is formed into a tapered shape. Further, under the influence of the alkali treatment at the end of the sea-island composite fiber 22, the shoulder part of the sea-island composite fiber 22 that is left connected to the exposed island part 23 is rounded as shown in the figure. Smooth shape.
　このような先端部が先細りテーパー形状に形成された露出島部２３を備えたブラシ用毛材２１においても、前述の実施形態１と同様、被清掃物が傷つけられにくく、ソフトな触感が得られ、かつ、細かい部位に対しても優れた清掃性が発現され、しかも、優れた耐久性が得られる。このうち清掃性に関しては、露出島部２３の先端部が尖鋭になっている分、より細かい部位に対しても優れた清掃効果を発揮することが可能である。 Even in the brush bristle material 21 having the exposed island portion 23 having such a tapered end and a tapered end, the object to be cleaned is hardly damaged and a soft tactile sensation is obtained as in the first embodiment. In addition, excellent cleaning properties are exhibited even for fine parts, and excellent durability is obtained. Among these, regarding the cleanability, since the tip of the exposed island portion 23 is sharp, it is possible to exert an excellent cleaning effect even for a finer portion.
　上記実施形態１と実施形態２について、歯ブラシに適用した場合の代表的な特徴を表１にまとめた。実施形態１では、海部をポリブチレンテレフタレート（ＰＢＴ）で、島部をナイロン（Ｎｙ）（登録商標）で形成し、実施形態２では、海部をポリエチレンテレフタレート（ＰＥＴ）、島部をポリブチレンテレフタレート（ＰＢＴ）で形成し、それぞれアルカリ処理で露出島部を形成した。表１におけるブラシ用毛材の特性は、通常一般の単一の材質のナイロン（登録商標）のモノフィラメントで形成されたブラシ用毛材との対比特性として示してあり、ブラシ用毛材の耐久性に関しては、前述の特許文献１に記載の毛材との対比特性として示してある。表１における○は、対比対象と同等以上の特性を有することを示しており、◎は、対比対象に比べ顕著に優れていることを示している。 Table 1 summarizes typical characteristics of Embodiment 1 and Embodiment 2 when applied to a toothbrush. In Embodiment 1, the sea part is made of polybutylene terephthalate (PBT) and the island part is made of nylon (Ny) (registered trademark). In Embodiment 2, the sea part is made of polyethylene terephthalate (PET), and the island part is made of polybutylene terephthalate ( PBT), and exposed islands were formed by alkali treatment. The characteristics of the bristle material for brushes in Table 1 are shown as contrast characteristics with the bristle material for brushes formed of nylon (registered trademark) monofilament, which is usually a single material, and the durability of the bristle material for brushes. Is shown as a contrast characteristic with the hair material described in Patent Document 1 described above. A circle in Table 1 indicates that the characteristic is equal to or higher than that of the object to be compared, and an ◎ indicates that it is significantly superior to the object to be compared.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　本発明に係るブラシ用毛材においては、海島複合繊維の横断面における、島部が外周面形成部以外の中央部寄りの部位に偏在されている限り、好ましくは、外周面形成部直近の島部の径Ｄｉと外周面形成部の海部の厚みＴｓとの比率Ｔｓ／Ｄｉが１．２以上となるように構成される限り、海島複合繊維としては種々の横断面形態を採り得る。図４、図５に各種形態を例示する。 In the bristle material for brushes according to the present invention, as long as the island part is unevenly distributed in a portion near the center other than the outer peripheral surface forming part in the cross section of the sea-island composite fiber, preferably the island closest to the outer peripheral surface forming part As long as the ratio Ts / Di between the diameter Di of the part and the thickness Ts of the sea part of the outer peripheral surface forming part is 1.2 or more, the sea-island composite fiber can take various cross-sectional forms. Various forms are illustrated in FIGS. 4 and 5.
　図４（Ａ）に示すブラシ用毛材３１は、実質的に図１（Ｂ）に示した形態と同じものであり、海部３２と島部３３からなる海島複合繊維３４と、海部のみからなる所定厚み以上の外周面形成部３５を有している。図４（Ｂ）に示すブラシ用毛材４１では、海部４２と島部４３からなる海島複合繊維４４と、海部のみからなる所定厚み以上の外周面形成部４５を有しており、海島複合繊維４４の横断面形状が略正方形に形成されている。図４（Ｃ）に示すブラシ用毛材５１では、海部５２と島部５３からなる海島複合繊維５４と、海部のみからなる所定厚み以上の外周面形成部５５を有しており、海島複合繊維４４の横断面形状と島部５３の存在領域の横断面形状の両方が略正方形に形成されている。図４（Ｄ）に示すブラシ用毛材６１では、海部６２と島部６３からなる海島複合繊維６４と、海部のみからなる所定厚み以上の外周面形成部６５を有しており、海島複合繊維６４の横断面形状が花びら状あるいは星形の形状に形成されている。図４（Ｅ）に示すブラシ用毛材７１では、海部７２と島部７３からなる海島複合繊維７４と、海部のみからなる所定厚み以上の外周面形成部７５を有しており、島部７３が環状に配置されて、海島複合繊維７４の横断面中央部には島部７３が配置されない領域７６が存在している。 The brush bristle material 31 shown in FIG. 4 (A) is substantially the same as that shown in FIG. 1 (B), and consists of the sea-island composite fiber 34 composed of the sea part 32 and the island part 33, and only the sea part. It has the outer peripheral surface forming part 35 more than predetermined thickness. The brush bristle material 41 shown in FIG. 4 (B) has a sea-island composite fiber 44 composed of a sea part 42 and an island part 43, and an outer peripheral surface forming part 45 consisting of only the sea part and having a predetermined thickness or more. The cross-sectional shape of 44 is formed in a substantially square shape. The brush bristle material 51 shown in FIG. 4 (C) has a sea-island composite fiber 54 composed of a sea part 52 and an island part 53 and an outer peripheral surface forming part 55 composed of only the sea part and having a predetermined thickness or more. Both the cross-sectional shape of 44 and the cross-sectional shape of the region where the island portion 53 exists are formed in a substantially square shape. The brush bristle material 61 shown in FIG. 4D has a sea-island composite fiber 64 composed of a sea part 62 and an island part 63, and an outer peripheral surface forming part 65 having a predetermined thickness or more composed only of the sea part. 64 cross-sectional shapes are formed in a petal shape or a star shape. The brush bristle material 71 shown in FIG. 4 (E) has a sea-island composite fiber 74 composed of a sea part 72 and an island part 73, and an outer peripheral surface forming part 75 having a predetermined thickness or more composed only of the sea part. Are arranged in an annular shape, and a region 76 where the island portion 73 is not disposed exists in the central portion of the cross section of the sea-island composite fiber 74.
　また、図５（Ａ）に示すブラシ用毛材８１では、海部８２と島部８３ａ、８３ｂからなる海島複合繊維８４と、海部のみからなる所定厚み以上の外周面形成部８５を有しており、島部が互いに異なる横断面形状の島部８３ａ（横断面円形）と島部８３ｂ（横断面三角形）の２種の島部で構成されている。横断面三角形の島部８３ｂは横断面円形の島部８３ａに比べ、より優れた汚れの掻き取り効果が期待でき、機能の異なる２種の島部８３ａ、８３ｂに存在により、露出島部全体としてバランスのとれた良好な清掃性が期待できる。図５（Ｂ）に示すブラシ用毛材９１では、海部９２と島部９３からなる海島複合繊維９４と、海部のみからなる所定厚み以上の外周面形成部９５を有しており、全島部９３の横断面形状が三角形に形成されている。露出島部の全てが横断面三角形の島部で構成されることになるので、優れた汚れの掻き取り効果が期待できる。図５（Ｃ）に示すブラシ用毛材１０１では、海部１０２と島部１０３からなる海島複合繊維１０４と、海部のみからなる所定厚み以上の外周面形成部１０５を有しており、全島部１０３の横断面形状が星形に形成されている。露出島部の全てが横断面星形の島部で構成されることになるので、優れた汚れの掻き取り効果が期待できるとともに、露出島部にその優れた汚れ掻き取り性能と適度な弾力性とを併せ持たせることが可能になる。 Further, the brush bristle material 81 shown in FIG. 5A has a sea-island composite fiber 84 composed of a sea part 82 and island parts 83a and 83b, and an outer peripheral surface forming part 85 composed of only the sea part and having a predetermined thickness or more. The island part is composed of two types of island parts, that is, an island part 83a (circular cross section) and an island part 83b (transverse triangle) having different cross-sectional shapes. Compared to the island 83a having a circular cross section, the island 83b having a triangular cross section can be expected to have a superior dirt scraping effect, and due to the presence of the two types of islands 83a and 83b having different functions, A well-balanced and good cleanability can be expected. The brush bristle material 91 shown in FIG. 5 (B) has a sea-island composite fiber 94 composed of a sea part 92 and an island part 93, and an outer peripheral surface forming part 95 composed of only the sea part and having a predetermined thickness or more. Is formed in a triangular shape. Since all of the exposed islands are composed of islands having a triangular cross section, an excellent dirt scraping effect can be expected. The brush bristle material 101 shown in FIG. 5C has a sea-island composite fiber 104 composed of a sea part 102 and an island part 103, and an outer peripheral surface forming part 105 composed of only the sea part and having a predetermined thickness or more. Is formed in a star shape. Since all of the exposed islands are composed of islands with a star-shaped cross section, an excellent dirt scraping effect can be expected, and the exposed islands have excellent dirt scraping performance and moderate elasticity. Can be held together.
　また、図５（Ｄ）に示すブラシ用毛材１１１では、海部１１２と島部１１３からなる海島複合繊維１１４と、海部のみからなる所定厚み以上の外周面形成部１１５を有しており、全島部１１３の横断面形状がＹ字形に形成されている。このようなＹ字形横断面形状の露出島部では、優れた汚れの掻き取り効果が期待できるとともに、掻き取った成分を多数の露出島部中に良好に保持する効果も期待でき、例えば、洗顔ブラシや化粧ブラシに好適な性能を期待できる。図５（Ｅ）に示すブラシ用毛材１２１では、海部１２２と島部１２３からなる海島複合繊維１２４と、海部のみからなる所定厚み以上の外周面形成部１２５を有しており、全島部１２３の横断面形状が繭形に形成されている。このような繭形横断面形状の露出島部では、よりソフトな触感が期待できるとともに、掻き取った成分を多数の露出島部中に良好に保持する効果も期待でき、例えば、洗顔ブラシや化粧ブラシに好適な性能を期待できる。さらに、図５（Ｆ）に示すブラシ用毛材１３１では、海部１３２と島部１３３ａ、１３３ｂからなる海島複合繊維１３４と、海部のみからなる所定厚み以上の外周面形成部１３５を有しており、島部が互いに異なる材質の２種の島部１３３ａ、１３３ｂに形成されている。このような異なる材質の島部１３３ａ、１３３ｂで露出島部を構成することにより、例えば、弾力性や触感の異なる露出島部をバランスよく混在させることが可能になり、用途により適した性能の発揮が可能になる。 In addition, the brush bristle material 111 shown in FIG. 5D has a sea-island composite fiber 114 composed of a sea part 112 and an island part 113, and an outer peripheral surface forming part 115 composed of only the sea part and having a predetermined thickness or more. The cross-sectional shape of the portion 113 is formed in a Y shape. In such an exposed island portion having a Y-shaped cross-sectional shape, an excellent dirt scraping effect can be expected, and an effect of favorably retaining the scraped components in a number of exposed island portions can also be expected. Performance suitable for brushes and makeup brushes can be expected. The brush bristle material 121 shown in FIG. 5 (E) has a sea-island composite fiber 124 composed of a sea part 122 and an island part 123, and an outer peripheral surface forming part 125 having a predetermined thickness or more consisting only of the sea part. The cross-sectional shape of is formed into a bowl shape. The exposed island portion having such a bowl-shaped cross-sectional shape can be expected to have a softer tactile sensation, and can also be expected to favorably retain the scraped components in a large number of exposed island portions. Performance suitable for a brush can be expected. Further, the brush bristle 131 shown in FIG. 5 (F) has the sea-island composite fiber 134 composed of the sea part 132 and the island parts 133a, 133b, and the outer peripheral surface forming part 135 having only a sea part and having a predetermined thickness or more. The island portions are formed on two types of island portions 133a and 133b made of different materials. By configuring the exposed islands with the islands 133a and 133b made of different materials, for example, it becomes possible to mix exposed islands having different elasticity and tactile sensation in a well-balanced manner. Is possible.
　このように、本発明における海島複合繊維としては種々の横断面形態を採り得、用途や使用目的に応じて、最適な設計をすることが可能である。 As described above, the sea-island composite fiber in the present invention can take various cross-sectional forms, and can be optimally designed according to the application and intended use.
　以下に、本発明の実施例について説明する。
実施例１～１１、比較例１
［ブラシ用毛材の作製］
　原料として、ポリブチレンテレフタレート（ＰＢＴ、東レ（株）製、“トレコン”（登録商標）１１００ＳＷ）、ポリエチレンテレフタレート（ＰＥＴ、東レ（株）製、Ｔ７５５Ｍ）、ナイロン６１０（Ｎｙ６１０、東レ（株）製、“アミラン” （登録商標）ＣＭ２００１）、熱可塑性ポリアミドエラストマー（Ｎｙ１１－ＰＴＭＧ（ポリテトラメチレングリコール）、アルケマ社製“ペバックス”（登録商標）７２Ｒ５３）、ポリブチレンナフタレート（ＰＢＮ、東洋紡社製、ＡＥ－５００）を推奨される条件にて乾燥し準備した。海部、島部の樹脂種、海部と島部との面積比率、島部の数を表２の通りとし、島部が海部内中央部寄りの部位に偏在されるように設計した海島型複合繊維を溶融紡糸した。溶出された繊維を水中で冷却固化させた後、一段目として６０℃の温水中で、二段目として１２０℃乾燥雰囲気中で４．５倍に延伸し、次いで乾熱雰囲気中で弛緩熱セットを実施して海島複合繊維を得た。得られた海島複合繊維の構成を表２に示す。 Examples of the present invention will be described below.
Examples 1 to 11 and Comparative Example 1
[Production of brush hair]
As raw materials, polybutylene terephthalate (PBT, manufactured by Toray Industries, Inc., “Trecon” (registered trademark) 1100SW), polyethylene terephthalate (PET, manufactured by Toray Industries, Inc., T755M), nylon 610 (Ny610, manufactured by Toray Industries, Inc.) "Amilan" (registered trademark) CM2001), thermoplastic polyamide elastomer (Ny11-PTMG (polytetramethylene glycol), "Pebax" (registered trademark) 72R53, manufactured by Arkema), polybutylene naphthalate (PBN, manufactured by Toyobo, AE) -500) was dried and prepared under the recommended conditions. The sea-island type composite fiber is designed so that the sea part, the resin type of the island part, the area ratio between the sea part and the island part, and the number of island parts are as shown in Table 2, and the island part is unevenly distributed near the center of the sea part. Was melt spun. After the eluted fiber was cooled and solidified in water, it was stretched 4.5 times in 60 ° C warm water as the first step and 120 ° C in a dry atmosphere as the second step, and then relaxed heat set in a dry heat atmosphere To obtain sea-island composite fibers. The composition of the obtained sea-island composite fiber is shown in Table 2.
　上記繊維を束径４５ｍｍの直線状に束ねて包装した後、任意の長さにカットした。次いでこのカットされた両端面を露出した状態で海島複合繊維の束を加温した苛性ソーダ溶液に浸漬して、両端部を溶解除去し、島部を露出させた。苛性ソーダ溶液への浸漬時間を変更することにより、島部の露出長さをコントロールした。得られたブラシ用毛材の特徴を表２に示す。 The above fibers were bundled in a straight line having a bundle diameter of 45 mm and packaged, and then cut into an arbitrary length. Next, the bundle of sea-island composite fibers was immersed in a heated caustic soda solution with both the cut end faces exposed, and both ends were dissolved and removed to expose the islands. The exposed length of the islands was controlled by changing the immersion time in the caustic soda solution. Table 2 shows the characteristics of the obtained brush hair material.
　比較例１として、ＰＢＴ繊維を上記同様に苛性ソーダ溶液に浸漬して、両端部を先細りテーパーに加工したブラシ用毛材を作製した。 As Comparative Example 1, a PBT fiber was dipped in a caustic soda solution in the same manner as described above, and a bristle material for a brush having both ends tapered to a taper was produced.
［歯ブラシの作製］
　上記の方法で得られたブラシ用毛材を平線式植毛機にセットし、所定の本数（１５～４０本程度）をピッキングし、平線と共に歯ブラシヘッドの植毛穴に二つ折りにして打ち込んだ。歯ブラシヘッドとしては、植毛穴の直径が１．５ｍｍ、８行４列の植毛部を有するものを用いた。実施例、比較例で作製した歯ブラシの毛丈（ｍｍ）と植毛本数（本／穴）を表２に示す。 [Production of toothbrush]
The brush bristle material obtained by the above method was set in a flat wire type flocking machine, a predetermined number (about 15 to 40) was picked, and folded into the flock hole of the toothbrush head along with the flat wire and driven. . As the toothbrush head, one having a flocked portion with a diameter of 1.5 mm and 8 rows and 4 columns was used. Table 2 shows the bristle length (mm) and the number of flocks (lines / hole) of the toothbrushes produced in Examples and Comparative Examples.
　得られた各歯ブラシについて、以下の評価を行い、表２に示す結果を得た。
［清掃性評価］
　歯列模型にニッシン社製人工プラークを塗布し、５分以上乾燥させた。歯列模型の上面から荷重２３０ｇの力で水を含ませた歯ブラシを押し当て、歯列に沿う方向にストローク幅７０ｍｍ、ストローク速度１８０ｍｍ／ｓｅｃでブラッシングを行った。歯面の評価には歯列模型の奥歯部分上側を、歯間の評価には前歯部分外側を使用した。ナイロン毛歯ブラシにて２０回ブラッシングした時の汚れの残り具合を基準とし、基準に至るまでのブラッシング回数から清掃性を次の式にて算出した。
　清掃性＝２０÷（基準に至るまでのブラッシング回数） The following evaluation was performed about each obtained toothbrush, and the result shown in Table 2 was obtained.
[Cleanability evaluation]
An artificial plaque made by Nissin Co. was applied to the dentition model and dried for 5 minutes or more. A toothbrush containing water was pressed from the upper surface of the dentition model with a load of 230 g, and brushing was performed in a direction along the dentition at a stroke width of 70 mm and a stroke speed of 180 mm / sec. For the evaluation of the tooth surface, the upper part of the back tooth part of the dentition model was used, and for the evaluation between the teeth, the outer part of the front tooth part was used. Based on the remaining amount of dirt when brushed 20 times with a nylon bristle brush, the cleanability was calculated from the number of brushings up to the standard using the following formula.
Cleanability = 20 ÷ (number of brushes to reach standard)
［毛開き耐久性評価］
　歯ブラシに対して摺動面裏側から垂直に２３０ｇの荷重を掛け、３７℃の温水を滴下させた状態でステンレス製の波板に対して歯ブラシの長手方向に１０００回摺動運動をさせ、ブラシ部の毛開き率（％）を測定した。毛開き率の算出方法は、初期状態におけるブラシ部の横幅をＡｍｍ、摺動後の横幅をＢｍｍとしたとき、（Ｂ－Ａ）／Ａ×１００％とした。 [Hair opening durability evaluation]
Apply a load of 230 g perpendicularly from the back side of the sliding surface to the toothbrush, and make a sliding motion 1000 times in the longitudinal direction of the toothbrush with respect to the stainless steel corrugated plate in a state where 37 ° C. hot water is dropped. The hair opening rate (%) was measured. The method for calculating the openness ratio was (BA) / A × 100%, where Amm is the width of the brush portion in the initial state and Bmm is the width after sliding.
［毛裂け耐久性評価］
　上記毛開き耐久性の評価と同様の条件で、ブラッシング回数５０回ごとに毛先の裂けについて観察し、毛裂けが生じた毛材が５本となった回数を記録した。 [Hair splitting durability evaluation]
Under the same conditions as in the evaluation of the above-mentioned hair opening durability, tearing of the hair tips was observed every 50 brushing times, and the number of times that the hair material in which the hair broke was 5 was recorded.
［触感・泡立ち評価］
　成人２０名に３０日間歯ブラシを使用してもらい、次の基準にて回答を求め、平均の点数を評価値とした。
　　　点数  　触感                  　泡立ち
　　　５    非常に柔らかい    非常に泡立ちが良い
　　　４    柔らかい          泡立ちが良い
　　　３    ふつう                  どちらともいえない
　　　２    硬い              泡立ちが悪い
　　　１    非常に硬い        非常に泡立ちが悪い [Evaluation of touch and foaming]
Twenty adults used a toothbrush for 30 days, asked for answers according to the following criteria, and the average score was used as an evaluation value.
Score Tactile Foaming 5 Very soft Very foaming 4 Soft Good foaming 3 Normal Neither 2 Hard foaming 1 Very hard Very foaming
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　本発明は、あらゆるブラシに適用でき、特に、歯ブラシ、精密洗浄用ブラシ、洗顔ブラシ、化粧ブラシ等に好適なものである。 The present invention can be applied to all brushes, and is particularly suitable for toothbrushes, precision cleaning brushes, face washing brushes, makeup brushes, and the like.
１、２１　ブラシ用毛材
２　海部
３　島部
３ａ、２３　露出島部
４、２２　海島複合繊維
５　外周面形成部
１１　ブラシ用毛材
１２　歯ブラシ構成部材
１２ａ　ヘッド部表面側部材
１２ｂ　ヘッド部裏面側部材
１３　歯ブラシ
１４　植毛穴
１５　平線
１６　貫通穴
１７　焼玉
３１、４１、５１、６１、７１、８１、９１、１０１、１１１、１２１．１３１　ブラシ用毛材
３２、４２、５２、６２、７２、８２、９２、１０２、１１２、１２２．１３２　海部
３３、４３、５３、６３、７３、８３ａ、８３ｂ、９３、１０３、１１３、１２３．１３３ａ．１３３ｂ　島部
３４、４４、５４、６４、７４、８４、９４、１０４、１１４、１２４．１３４　海島複合繊維
３５、４５、５５、６５、７５、８５、９５、１０５、１１５、１２５．１３５　外周面形成部
７６　島部が配置されない領域 DESCRIPTION OF SYMBOLS 1,21 Brush hair material 2 Sea part 3 Island part 3a, 23 Exposed island part 4, 22 Sea-island composite fiber 5 Outer surface formation part 11 Brush hair material 12 Toothbrush component 12a Head part surface side member 12b Head part back surface side member 13 Toothbrush 14 Flocking hole 15 Flat wire 16 Through hole 17 Grilled balls 31, 41, 51, 61, 71, 81, 91, 101, 111, 121.131 Brush bristle material 32, 42, 52, 62, 72, 82 , 92, 102, 112, 122.132 Sea part 33, 43, 53, 63, 73, 83a, 83b, 93, 103, 113, 123.133a. 133b Island 34, 44, 54, 64, 74, 84, 94, 104, 114, 124.134 Sea- island composite fiber 35, 45, 55, 65, 75, 85, 95, 105, 115, 125.135 Formation part 76 Area where island part is not arranged

Claims (16)

  1. 　薬剤溶解速度の異なる２種類以上の樹脂からなる海島複合繊維の長手方向一端部または両端部における島部が露出されたブラシ用毛材であって、前記海島複合繊維の外周面を形成する外周面形成部が海部のみで構成されており、該海島複合繊維の島部が、該海島複合繊維の横断面において、前記外周面形成部以外の中央部寄りの部位に偏在されていることを特徴とするブラシ用毛材。 A bristle material for a brush in which islands at one or both ends in the longitudinal direction of a sea-island composite fiber composed of two or more types of resins having different drug dissolution rates are exposed, and an outer peripheral surface forming the outer peripheral surface of the sea-island composite fiber The formation part is composed of only the sea part, and the island part of the sea-island composite fiber is unevenly distributed in a portion near the center part other than the outer peripheral surface formation part in the cross section of the sea-island composite fiber. Brush material to brush.
  2. 　前記海島複合繊維の横断面における、前記外周面形成部直近の島部の径Ｄｉと前記外周面形成部の海部の厚みＴｓとの比率Ｔｓ／Ｄｉが１．２以上である、請求項１に記載のブラシ用毛材。 The ratio Ts / Di between the diameter Di of the island part immediately adjacent to the outer peripheral surface forming part and the thickness Ts of the sea part of the outer peripheral surface forming part in the transverse cross section of the sea-island composite fiber is 1.2 or more. The bristle material for brush as described.
  3. 　前記島部の露出長さが０．５～１０ｍｍの範囲にある、請求項１または２に記載のブラシ用毛材。 The brush hair material according to claim 1 or 2, wherein the exposed length of the island part is in the range of 0.5 to 10 mm.
  4. 　前記島部の径が１～２０μｍの範囲にある、請求項１～３のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 3, wherein the island portion has a diameter in a range of 1 to 20 µm.
  5. 　前記海島複合繊維の横断面における前記島部の数が２０以上である、請求項１～４のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 4, wherein the number of the island portions in the cross section of the sea-island composite fiber is 20 or more.
  6. 　前記海島複合繊維の径が５０～１，０００μｍの範囲にある、請求項１～５のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 5, wherein the diameter of the sea-island composite fiber is in the range of 50 to 1,000 µm.
  7. 　前記海島複合繊維の海部がポリエステル系樹脂からなり、島部が該ポリエステル系樹脂よりも薬剤溶解速度が遅い樹脂からなる、請求項１～６のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 6, wherein the sea part of the sea-island composite fiber is made of a polyester resin, and the island part is made of a resin having a slower drug dissolution rate than the polyester resin.
  8. 　前記海島複合繊維の横断面形状が円形に形成されている、請求項１～７のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 7, wherein the sea-island composite fiber has a circular cross-sectional shape.
  9. 　前記海島複合繊維の横断面が円形以外の異形断面形状に形成されている、請求項１～７のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 7, wherein the sea-island composite fiber has a cross-sectional shape other than a circular shape.
  10. 　前記海島複合繊維の島部の横断面形状が円形に形成されている、請求項１～９のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 9, wherein a cross-sectional shape of the island part of the sea-island composite fiber is circular.
  11. 　前記海島複合繊維の島部の横断面が円形以外の異形断面形状に形成されている、請求項１～９のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 9, wherein a cross-section of the island part of the sea-island composite fiber is formed in an irregular cross-sectional shape other than a circular shape.
  12. 　前記海島複合繊維の端部において露出された島部の先端部が先細りテーパー形状に形成されている、請求項１～１１のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 11, wherein a tip end portion of the island portion exposed at an end portion of the sea-island composite fiber is formed in a tapered shape.
  13. 　前記海島複合繊維が互いに異なる材質の島部を有する、請求項１～１２のいずれかに記載のブラシ用毛材。 The brush bristle material according to any one of claims 1 to 12, wherein the sea-island composite fibers have island portions made of different materials.
  14. 　請求項１～１３のいずれかに記載のブラシ用毛材が少なくとも一部に使用されているブラシ。 A brush in which the bristle material for brush according to any one of claims 1 to 13 is used at least in part.
  15. 　毛丈が１～５０ｍｍの範囲にある、請求項１４に記載のブラシ。 The brush according to claim 14, wherein the hair length is in the range of 1 to 50 mm.
  16. 　歯ブラシである、請求項１４または１５に記載のブラシ。 The brush according to claim 14 or 15, which is a toothbrush.
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JPH0399604A (en) * 1989-09-12 1991-04-24 Toray Ind Inc Brush fiber and brush
JPH0998837A (en) * 1995-10-09 1997-04-15 Shiseido Co Ltd Fiber for brush bristle
JPH09322821A (en) * 1996-06-05 1997-12-16 Sunstar Inc Toothbrush
JP2006340748A (en) * 2005-06-07 2006-12-21 Lion Corp Bristle for toothbrush and toothbrush
JP2007151704A (en) * 2005-12-02 2007-06-21 Sunstar Inc Toothbrush
JP2010194150A (en) * 2009-02-26 2010-09-09 Toray Monofilament Co Ltd Bristle material for toothbrush, and toothbrush

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230543A (en) * 2005-02-23 2006-09-07 Toray Monofilament Co Ltd Bristle material for brush and brush
JP5703785B2 (en) 2010-01-29 2015-04-22 東レ株式会社 Compound base
JP5630254B2 (en) 2010-12-15 2014-11-26 東レ株式会社 Composite fiber
JP5900041B2 (en) 2011-06-10 2016-04-06 東レ株式会社 Composite base and composite fiber manufacturing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0399604A (en) * 1989-09-12 1991-04-24 Toray Ind Inc Brush fiber and brush
JPH0998837A (en) * 1995-10-09 1997-04-15 Shiseido Co Ltd Fiber for brush bristle
JPH09322821A (en) * 1996-06-05 1997-12-16 Sunstar Inc Toothbrush
JP2006340748A (en) * 2005-06-07 2006-12-21 Lion Corp Bristle for toothbrush and toothbrush
JP2007151704A (en) * 2005-12-02 2007-06-21 Sunstar Inc Toothbrush
JP2010194150A (en) * 2009-02-26 2010-09-09 Toray Monofilament Co Ltd Bristle material for toothbrush, and toothbrush

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