WO2017111009A1 - Brush bristle material, brush using same, and manufacturing method for said brush bristle material - Google Patents

Brush bristle material, brush using same, and manufacturing method for said brush bristle material Download PDF

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Publication number
WO2017111009A1
WO2017111009A1 PCT/JP2016/088358 JP2016088358W WO2017111009A1 WO 2017111009 A1 WO2017111009 A1 WO 2017111009A1 JP 2016088358 W JP2016088358 W JP 2016088358W WO 2017111009 A1 WO2017111009 A1 WO 2017111009A1
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WO
WIPO (PCT)
Prior art keywords
island
sea
composite fiber
brush
bristle material
Prior art date
Application number
PCT/JP2016/088358
Other languages
French (fr)
Japanese (ja)
Inventor
山本健雄
土岐美鈴
田中嘉洋
増田正人
柴田剛志
松浦知彦
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 JP2017508118A priority Critical patent/JPWO2017111009A1/en
Priority to KR1020187019636A priority patent/KR20180097626A/en
Priority to CN201680076077.4A priority patent/CN108471871A/en
Publication of WO2017111009A1 publication Critical patent/WO2017111009A1/en

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    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • 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
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/04—Preparing bristles
    • A46D1/055—Combing; Mixing; Sorting
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

  • the present invention relates to a brush bristle material suitable for various brushes including a toothbrush, a brush using the same, and a method for producing the brush bristle material.
  • 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 will be reduced, it will be difficult to obtain excellent scraping performance of dirt due to the hair tip, the touch feeling to the gums will become too strong and the gums etc. will be easily damaged There is.
  • 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.
  • a brush bristle material in which the island part of the sea-island composite fiber has an irregular cross-sectional shape to improve the scraping performance of dirt by the hair tip has also been proposed (Patent Document 2).
  • the island is distributed over substantially the entire region of the cross section of the sea-island composite fiber used as the bristle material for the brush, and the island is actually exposed at the tip of the bristle.
  • the sea that supports the exposed island with the bristle root may be torn and durable. The problem remains that there is a risk of inadequate performance.
  • Patent Document 3 recently proposed while paying attention to the excellent features and remaining problems of the bristle material for brushes as described in Patent Documents 1 and 2 in the past. Focusing on the sea-island composite fiber manufacturing technology that allows the islands to be designed virtually freely, such as soft touch and other characteristics that do not damage the object to be cleaned, and excellent dirt scraping performance
  • the object is to provide a bristle material for brushes having excellent cleaning properties and excellent durability, a brush using the same, and a method for producing the bristle material for brushes.
  • a brush hair material 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 that is a bristle material, the sea-island composite fiber has a plurality of edge-attached island parts having a cross-sectional shape with an edge part in the vicinity of the outer peripheral surface of the sea-island composite fiber, and forms the outer peripheral surface of the sea-island composite fiber
  • the formation part is composed only of the sea part, and in the cross section of the sea-island composite fiber, the diameter Di of the circumscribed circle of the edged island part immediately adjacent to the outer peripheral surface formation part and the thickness Ts of the sea part of the outer peripheral surface formation part,
  • the ratio Ts / Di is 0.3 or more. This ratio Ts / Di is preferably 0.5 or more, and more preferably 0.8 or more.
  • 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.
  • the cross-sectional shape of the plurality of island portions in the vicinity of the outer peripheral surface of the sea-island composite fiber is a cross-sectional shape having an edge portion, so that the effect of scraping off dirt by the edge portion of the exposed island portion is expressed, The cleaning performance is further improved including the scraping performance.
  • 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 in the cross section of the sea-island composite fiber, the diameter Di of the circumscribed circle of the edged island part immediately adjacent to the outer peripheral surface formation part and When the ratio Ts / Di with the sea thickness Ts of the outer peripheral surface forming portion is set to 0.3 or more, the island portion with the edge immediately adjacent to the outer peripheral surface forming portion is the root portion of the exposed island portion where it is exposed. And the sea part which supports the exposed island part due to the external force when it is covered with the sea part more than the predetermined thickness in the vicinity part (part on the composite fiber side) and an external force is applied to the exposed island part.
  • the island part of the sea-island composite fiber is unevenly distributed in a portion near the central part other than the outer peripheral surface forming part formed by the sea part having the predetermined thickness or more in the cross section of the sea-island composite fiber, Since the unevenly distributed island part is exposed at the tip of the bristle material, the exposed island part has characteristics such as soft touch that does not damage the object to be cleaned, and the dirt scraping performance
  • the excellent durability by the outer peripheral surface formation part which consists of the sea part more than predetermined thickness is implement
  • At least one edge portion of the edge-attached island portion in the immediate vicinity of the outer peripheral surface forming portion (preferably the edge portions of all the edge-attached island portions in the immediate vicinity of the outer peripheral surface forming portion are present).
  • It is preferably directed outward in the radial direction of the sea-island composite fiber. If comprised in this way, the edge part of an island part with an edge can exhibit the dirt scraping performance by an edge part more effectively at the time of use of a brush, and the cleaning nature including dirt scraping performance is further improved.
  • the distance between adjacent islands in the cross section of the sea-island composite fiber is preferably in the range of 0.5 to 50 ⁇ m, more preferably in the range of 1 to 30 ⁇ m. It is. If the distance between adjacent islands is shorter than 0.5 ⁇ m, when the sea part of the sea-island composite fiber is dissolved and the island part of the fiber end part is exposed, there is a possibility that a branch failure of the exposed island part may occur due to undissolved residue. When the branch failure of an exposed island part arises, there exists a possibility that the above-mentioned outstanding cleaning property, the outstanding tactile sense, etc. may be impaired. If the distance between adjacent islands exceeds 50 ⁇ m, there will be no risk of branch failure in the exposed islands, but dirt held on the exposed islands due to scraping etc. will easily pass through between adjacent islands, and the cleaning performance is accordingly increased. May decrease.
  • 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 Di of the circumscribed circle of the edged island portion immediately adjacent to the outer peripheral surface forming portion is preferably in the range of 10 to 300 ⁇ m, more preferably 20 to 100 ⁇ m. Range. If the diameter of the island part with an edge is less than 10 ⁇ m, the waist of the exposed island part becomes too weak, and the waist necessary for the dirt scraping effect by the edge part (hereinafter sometimes referred to simply as the edge effect) There is a risk that it is difficult to obtain strength.
  • the exposed island part becomes too strong, and it becomes difficult to obtain an excellent cleaning property for fine parts such as a space between teeth, and it is also difficult to obtain a soft tactile sensation. There is a risk.
  • the diameter of this island part with an edge not all island parts need to be the same thickness.
  • the number of the island portions with edges in the cross section of the sea-island composite fiber is preferably 5 or more, but even if it is less than that, for example, the number of the island portions with edges is 4 or 3, etc. It may be.
  • a more preferable range of the number of island portions with edges is 8 or more, and a more preferable range is 10 or more.
  • 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 especially the cross-sectional shape of the island part with an edge, as long as it has an edge part, as will be described later, various triangles, quadrangles, and other It can be set to a substantially arbitrary shape such as a polygon, a star, or any other irregular shape.
  • This cross-sectional shape can also be set according to the application and intended use.
  • 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 (especially the cross-sectional shape of the island part with an edge) is formed in a shape that is substantially maintained as it is to the tip part of the exposed island part is, for example, only for the sea part It can be achieved by constituting the resin with a resin that dissolves in the solution and making the island part with a resin that does not dissolve in the drug.
  • 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 combines the above-mentioned characteristics such as the soft touch that does not damage the object to be cleaned and the excellent cleaning properties including the dirt scraping performance, and the bristle material with excellent durability. Since it is used, it is particularly suitable as a toothbrush, a brush for precision cleaning, a face-washing brush, a 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 from 1 to 20 mm, and more preferably from 5 to 15 mm.
  • the bristle material for brushes according to the present invention is designed to be substantially free 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 Document 3 described above. It can be intentionally made using techniques that can be used. Alternatively, a technique for producing a sea-island composite fiber using a conventionally known so-called pipe-type sea-island composite base (a base in which island components are finely divided by a pipe group and distributed in a predetermined state in the sea component). It can also be made intentionally. However, it is more preferable to use the technique described in Patent Document 3 described above because the target sea-island composite fiber can be produced more easily and with higher accuracy.
  • the method for producing a bristle material for a brush according to the present invention is a composite base for discharging a composite polymer flow composed of at least two polymers, and has a plurality of measuring holes for measuring each polymer component.
  • a sea-island composite fiber made of two or more kinds of resins having different drug dissolution rates is produced using a composite base having a distribution plate 2 having a plurality of distribution holes 2 formed in 2 and a discharge plate, and the sea-island composite It consists of the method characterized by manufacturing the bristle material for brushes which concerns on this invention as mentioned above using a fiber.
  • a brush bristle material having both excellent characteristics such as a soft tactile sensation that does not damage an object to be cleaned, and excellent cleaning properties including dirt scraping performance and excellent durability. can do.
  • 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 sea-island composite fiber 4 has a plurality of edge-attached island portions 3c each having an edge portion 3b in the vicinity of the outer peripheral surface of the sea-island composite fiber 4. Then, all the island parts 3 are formed in the island part 3c with an edge of the same cross-sectional triangle, and all these island parts with an edge 3c are longitudinal directions of the sea-island composite fiber 4 as shown in FIG.
  • the exposed island 3a is formed at one or both ends in the direction.
  • the island part 3 consists of an island part of a some cross-sectional shape
  • the above-mentioned island part 3c with an edge and the island part of other forms may be mixed (this example is mentioned later).
  • the edge portions 3b of the six edged island portions 3c having the same triangular cross section are all directed outward in the radial direction of the sea-island composite fiber 4, in particular, outward on the radial line of the sea-island composite fiber 4.
  • the tip positions of the edge portions 3b in the fiber radial direction are arranged at substantially the same circle positions (circle positions indicated by broken lines) in the cross section, and all the edge portions 3b have excellent dirt. The scraping effect of can be demonstrated.
  • the six edged island portions 3 c are arranged on concentric circles with each edge portion 3 b facing outward in the radial direction of the sea-island composite fiber 4.
  • 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 a portion near the center part other than the outer peripheral surface forming part 5.
  • the ratio Ts / Di between the diameter Di of the circumscribed circle 6 of the island part 3c with the edge closest to the outer peripheral surface forming part 5 and the thickness Ts of the sea part 2 of the outer peripheral surface forming part 5 is 0.
  • the sea-island composite fiber 4 is produced so that it becomes 0.5 or more, preferably 0.5 or more, and more preferably 0.8 or more.
  • the sea-island composite fiber 4 having such a form 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 Document 3 described above. Can be made intentionally using a simple technique.
  • a composite base for discharging a composite polymer flow composed of at least two components of a polymer, a measuring plate having a plurality of measuring holes for measuring each polymer component, and a discharge polymer from the plurality of measuring holes
  • a distribution plate 1 in which a plurality of distribution holes 1 are formed in a confluence groove 1 where the flow is merged, and a plurality of distribution holes 2 are formed in a confluence groove 2 where a plurality of discharged polymer flows from the distribution holes 1 are merged.
  • Distribution plate 2 and further, if necessary, a distribution plate after distribution plate 3 in which a plurality of distribution holes are formed in a merging groove for merging a plurality of discharge polymer flows from an upstream distribution hole, and
  • the above-mentioned sea-island composite fiber 4 made of two or more kinds of resins having different drug dissolution rates can be produced using a composite die having a discharge plate for discharging a polymer from the distribution plate on the most downstream side (patent)
  • Reference 3 includes Various forms of composite spinneret is illustrated as). In such a manufacturing method, in particular, the exposed island portion 3a can be easily formed into the island portion with an edge 3c having a desired shape, and can be stably spun.
  • the brush bristle material 1 as described above can be produced using the sea-island composite fiber 4.
  • a sea-island composite fiber 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). 4 can also be produced.
  • the distance between adjacent island portions 3 in the cross section of the sea-island composite fiber 4 (distance between adjacent edge-attached island portions 3c in the illustrated example) d is 0. It is set in the range of 5 to 50 ⁇ m, more preferably in the range of 1 to 30 ⁇ m.
  • 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 island part 3 (exposed island part 3a) immediately adjacent to the outer peripheral surface forming part 5 is formed in the island part 3c with an edge, and the diameter Di of the circumscribed circle 6 and the thickness Ts of the sea part 2 of the outer peripheral surface forming part 5 The ratio Ts / Di is formed to be 0.3 or more.
  • a preferable range of the diameter Di of the circumscribed circle 6, a preferable range of the number of island portions with edges 3c in the cross section of the sea-island composite fiber 4, and a preferable range of the diameter of the sea-island composite fiber 4 are 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 ratio Ts / Di between the thickness Ts of the outer peripheral surface forming portion 5 and the circumscribed circle diameter Di of the edged island portion 3c in the immediate vicinity of the outer peripheral surface forming portion is set to 0.3 or more, so that The exposed island portion 3a composed of the island portion 3c with the edge is supported at the base portion in a state covered with the sea portion 2 having a sufficient thickness, and even when an external force is repeatedly applied to the exposed island portion 3a, The sea part 2 that supports the exposed island part 3a due to external force is prevented from tearing, and high durability of the bristle material 1 for 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 exposed island part 23 is formed in the island part with an edge, the outstanding scraping off effect is acquired and the further outstanding cleaning property is expressed.
  • tip part of the exposure island part 23 is sharp, it is possible to exhibit the outstanding cleaning effect also to a finer part.
  • 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 2 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 island portion in the cross section of the sea-island composite fiber, is unevenly distributed in a portion near the central portion other than the outer peripheral surface forming portion, and the edged island portion in the immediate vicinity of the outer peripheral surface forming portion.
  • 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 the form shown in FIG. 1 (B), and is formed in a sea-island composite fiber 34 having a sea part 32 and an island part 33 with an edge. In addition, it has an outer peripheral surface forming portion 35 having a predetermined thickness or more and consisting only of the sea portion. Reference numeral 36 denotes a circumscribed circle of the island part 33 with the edge.
  • the brush bristle material 41 shown in FIG. 4 (B) is formed on the sea-island composite fiber 44 having the sea part 42 and the island part 43 with the edge, and has an outer peripheral surface forming part 45 having only a sea part and having a predetermined thickness or more.
  • the number of the edge-attached island portions 43 is five as compared with the embodiment shown in FIG.
  • Reference numeral 46 denotes a circumscribed circle of the edged island portion 43.
  • the brush bristle material 51 shown in FIG. 4 (C) is formed on a sea-island composite fiber 54 having a sea part 52 and an island part 53 with an edge, and has an outer peripheral surface forming part 55 having a predetermined thickness or more consisting only of the sea part.
  • the number of edge-attached island portions 53 is three as compared to the configuration shown in FIG.
  • Reference numeral 56 indicates a circumscribed circle of the island part 53 with the edge.
  • FIG. 4 (D) is formed on a sea-island composite fiber 64 having a sea part 62 and an island part 63 with an edge, and has an outer peripheral surface forming part 65 having only a sea part and having a predetermined thickness or more.
  • the cross-sectional shape of the edge-attached island portion 63 is a pentagon, and the number of the edge-attached island portions 63 closest to the outer peripheral surface forming portion 65 is five.
  • the island part 63 with an edge is also arranged at the center of the cross section of the sea-island composite fiber 64.
  • Reference numeral 66 denotes a circumscribed circle of the edged island part 63.
  • the cross-sectional shape of the edge-attached island portion 73 is a quadrangle.
  • Reference numeral 76 indicates a circumscribed circle of the island part 73 with the edge.
  • the outer peripheral surface formation part 85 more than predetermined thickness which consists only of a sea part.
  • the cross-sectional shape of the edge-attached island portion 83 having a triangular cross-section is larger, and the edge portion directed outward in the radial direction of the sea-island composite fiber 84 is more It is formed in a sharp shape.
  • Reference numeral 86 denotes a circumscribed circle of the island part 83 with the edge.
  • 4G is formed on a sea-island composite fiber 94 having a sea part 92 and an island part 93 with an edge, and has an outer peripheral surface forming part 95 having a predetermined thickness or more consisting only of the sea part.
  • the cross-sectional shape of the edge-attached island portion 93 is formed in a parallelogram having a sharp edge portion.
  • Reference numeral 96 denotes a circumscribed circle of the island part 93 with the edge.
  • the cross-sectional shape of the edge-attached island portion 103 is a star shape, and the number of the edge-attached island portions 103 closest to the outer peripheral surface forming portion 105 is six.
  • the island part 103 with an edge is also arranged at the center of the cross section of the sea-island composite fiber 104.
  • Reference numeral 106 denotes a circumscribed circle of the edged island portion 103.
  • the cross-sectional shape of the edge-attached island portion 113 is an irregular cross-sectional shape in a double-edge portion state in which a part of a circle is cut off, and the outer peripheral surface forming portion 115 is formed.
  • the number of the nearest edge-attached island portions 113 is four.
  • Reference numeral 116 denotes a circumscribed circle of the edged island portion 113.
  • the cross-sectional shape of the edge-attached island portion 123 is a raindrop-like and has a deformed cross-sectional shape in a single edge portion state.
  • Reference numeral 126 indicates a circumscribed circle of the edged island portion 123.
  • the sea-island composite fiber 134 having the sea part 132 and the island part 133 with the edge, and the outer peripheral surface forming part 135 having only a sea part and having a predetermined thickness or more.
  • the cross-sectional shape of the edge-attached island portion 133 immediately adjacent to the outer peripheral surface forming portion 135 is a crescent shape and an irregular cross-sectional shape in a double edge portion state.
  • the island portion 137 disposed in the center of the cross section of the sea-island composite fiber 134 has a quadrangular cross section.
  • Reference numeral 136 indicates a circumscribed circle of the island part with edge 133.
  • an outer peripheral surface forming portion having a predetermined thickness or more which is formed of the sea-island composite fiber 144 having the sea part 142 and the island part 143 with an edge, and is composed only of the sea part.
  • the cross-sectional shape of the edge-attached island portion 143 in the immediate vicinity of the outer peripheral surface forming portion 145 is a quarter circle, and edge portions are provided on both sides in the circumferential direction. It has an irregular cross-sectional shape in a state of having.
  • Reference numeral 146 indicates a circumscribed circle of the edged island portion 143.
  • FIG. 5 illustrates various cross-sectional shapes of the sea-island composite fiber itself.
  • the cross-sectional shape of the sea-island composite fiber 154 having the sea part 152 and the island part 153 with an edge, and having the outer peripheral surface forming part 155 having only a sea part and having a predetermined thickness or more (Outside cross-sectional shape) is formed in a five-leaf shaped irregular cross-sectional shape.
  • the cross-sectional shape of the sea-island composite fiber 164 having the sea part 162 and the edged island part 163 and having the outer peripheral surface forming part 165 having a predetermined thickness or more consisting of only the sea part ( The outer cross-sectional shape) is formed in a triangular cross-sectional shape.
  • the cross-sectional shape of the sea-island composite fiber 174 having the sea part 172 and the edged island part 173, and having the outer peripheral surface forming part 175 having a predetermined thickness or more consisting only of the sea part (Outer cross-sectional shape) is formed in a rectangular cross-sectional shape.
  • the cross-sectional shape of the sea-island composite fiber 184 having the sea part 182 and the island part 183 with an edge, and having the outer peripheral surface forming part 185 having a predetermined thickness or more consisting only of the sea part (Outside cross-sectional shape) is formed in a three-leaf shaped irregular cross-sectional shape.
  • various forms can be adopted also in the cross-sectional shape of the sea-island composite fiber.
  • 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 10, Comparative Examples 1 and 2 [Production of brush hair]
  • PBT polybutylene terephthalate
  • PET polyethylene terephthalate
  • nylon 610 nylon 610
  • Poly11-PTMG polytetramethylene glycol
  • Pebax Pebax "(registered trademark) 72R53) manufactured by Arkema, Inc.
  • PBN polybutylene naphthalate
  • the sea island type 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 the island parts are as shown in Table 2, and the island part with the edge is unevenly distributed in the part near the central part in the sea part.
  • the composite fiber 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.
  • 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 sea-island composite fibers having the same composition as in Example 9 were formed in a shape in which the cross-sectional shape of the island part was circular and had no edge part.
  • 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.

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: the sea-island composite fiber has a plurality of edged island parts having an edge-equipped cross-sectional shape near the outer peripheral surface of the sea-island composite fiber; 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 a cross-section of the sea-island composite fiber, the ratio Ts/Di, which is the ratio of the thickness Ts of the sea part of the outer peripheral surface forming part to the diameter Di of the circumscribed circle of the edged island parts nearest to the outer peripheral surface forming part, is at least 0.3. Further provided are a brush using the brush bristle material and a manufacturing method for the brush bristle material. Thus it is possible to provide: a brush bristle material that has characteristics such as a soft texture that does not harm the object being cleaned, as well as an excellent cleaning performance even including the ability to scrape off dirt, and furthermore has an excellent durability; a brush using the brush bristle material; and a manufacturing method for the brush bristle material.

Description

ブラシ用毛材及びそれを用いたブラシ並びにそのブラシ用毛材の製造方法Brush hair material, brush using the same, and method for producing the brush hair material
　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並びにそのブラシ用毛材の製造方法に関する。 The present invention relates to a brush bristle material suitable for various brushes including a toothbrush, a brush using the same, and a method for producing the brush bristle material.
　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や、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、さらに、毛先による清掃の際の汚れの優れた掻き取り性能を有することが望まれる。 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, there is a good balance between the effect of cleaning the teeth by the hair tips and the effect of massaging such as soft touch and gums that do not damage the object to be cleaned. In addition, it is desirable to have an excellent scraping performance for dirt during cleaning with a hair tip.
　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、毛先による汚れの優れた掻き取り性能が得られにくかったり、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, there is a risk that the cleaning effect between the teeth will be reduced, it will be difficult to obtain excellent scraping performance of dirt due to the hair tip, the touch feeling to the gums will become too strong and the gums etc. will be easily damaged There is.
　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、単にブラシ用毛材を細くするだけでは、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, when the hair is made of a single material monofilament up to the hair tip, simply thinning the brush bristle will improve the cleaning effect between the teeth, but the waist of the bristle brush will be weak over the entire length. There is a risk that the massage effect such as gums will be reduced, and 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）。加えて、海島複合繊維の島部を異形横断面形状とし、毛先による汚れの掻き取り性能を向上させるようにしたブラシ用毛材も提案されている（特許文献２）。このような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、かつ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り、さらに露出島部の横断面形状を異形横断面形状とすることにより、汚れの掻き取り性能を向上させ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). In addition, a brush bristle material in which the island part of the sea-island composite fiber has an irregular cross-sectional shape to improve the scraping performance of dirt by the hair tip has also been proposed (Patent Document 2). By using such a bristle material for brushes, it is possible to achieve both a good balance between the excellent cleaning effect and the characteristic of hardly damaging the object to be cleaned, and a soft tactile sensation can be obtained by the thin island fibers at the exposed tip. Further, by making the cross-sectional shape of the exposed island part an irregular cross-sectional shape, it is possible to improve the dirt scraping performance.
　しかしながら、上記特許文献１や特許文献２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実質的に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 following problems remain in the brush bristle materials proposed in Patent Document 1 and Patent Document 2 described above. That is, the island is distributed over substantially the entire region of the cross section of the sea-island composite fiber used as the bristle material for the brush, and the island is actually exposed at the tip of the bristle. When used for a toothbrush, etc., 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 bristle root may be torn and durable. The problem remains that there is a risk of inadequate performance.
　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（例えば、特許文献３）。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. (For example, Patent Document 3). 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２０１１－２１８０８８号公報JP 2011-218088 A 特開２０１１－１７４２１５号公報JP 2011-174215 A
　そこで本発明の課題は、従来の特許文献１、２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、最近提案された特許文献３に記載されているような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、被清掃物を傷つけないソフトな触感等の特性と、汚れの掻き取り性能まで含めた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、そのブラシ用毛材の製造方法を提供することにある。 Therefore, the problem of the present invention is described in Patent Document 3 recently proposed while paying attention to the excellent features and remaining problems of the bristle material for brushes as described in Patent Documents 1 and 2 in the past. Focusing on the sea-island composite fiber manufacturing technology that allows the islands to be designed virtually freely, such as soft touch and other characteristics that do not damage the object to be cleaned, and excellent dirt scraping performance The object is to provide a bristle material for brushes having excellent cleaning properties and excellent durability, a brush using the same, and a method for producing the bristle material for brushes.
　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、前記海島複合繊維はエッジ部を備えた横断面形状のエッジ付島部を複数該海島複合繊維の外周面近傍に有し、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、該海島複合繊維の横断面における、前記外周面形成部直近の前記エッジ付島部の外接円の直径Ｄｉと前記外周面形成部の海部の厚みＴｓとの比率Ｔｓ／Ｄｉが０．３以上であることを特徴とするものからなる。この比率Ｔｓ／Ｄｉは、好ましくは０．５以上であり、より好ましくは０．８以上である。 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 that is a bristle material, the sea-island composite fiber has a plurality of edge-attached island parts having a cross-sectional shape with an edge part in the vicinity of the outer peripheral surface of the sea-island composite fiber, and forms the outer peripheral surface of the sea-island composite fiber The formation part is composed only of the sea part, and in the cross section of the sea-island composite fiber, the diameter Di of the circumscribed circle of the edged island part immediately adjacent to the outer peripheral surface formation part and the thickness Ts of the sea part of the outer peripheral surface formation part, The ratio Ts / Di is 0.3 or more. This ratio Ts / Di is preferably 0.5 or more, and more preferably 0.8 or more.
　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。さらに、海島複合繊維の外周面近傍の複数の島部の横断面形状がエッジ部を備えた横断面形状とされることにより、露出島部のエッジ部による汚れの掻き取り効果が発現され、汚れの掻き取り性能まで含めて清掃性が一層向上される。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、海島複合繊維の横断面において、外周面形成部直近の上記エッジ付島部の外接円の直径Ｄｉと外周面形成部の海部の厚みＴｓとの比率Ｔｓ／Ｄｉが０．３以上とされることにより、外周面形成部直近のエッジ付島部は、それが露出された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、所定厚み以上の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、上記所定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、被清掃物を傷つけないソフトな触感等の特性が得られ、かつ、汚れの掻き取り性能まで含めた優れた清掃効果が得られるという利点が活かされつつ、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. Further, the cross-sectional shape of the plurality of island portions in the vicinity of the outer peripheral surface of the sea-island composite fiber is a cross-sectional shape having an edge portion, so that the effect of scraping off dirt by the edge portion of the exposed island portion is expressed, The cleaning performance is further improved including the scraping performance. 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 in the cross section of the sea-island composite fiber, the diameter Di of the circumscribed circle of the edged island part immediately adjacent to the outer peripheral surface formation part and When the ratio Ts / Di with the sea thickness Ts of the outer peripheral surface forming portion is set to 0.3 or more, the island portion with the edge immediately adjacent to the outer peripheral surface forming portion is the root portion of the exposed island portion where it is exposed. And the sea part which supports the exposed island part due to the external force when it is covered with the sea part more than the predetermined thickness in the vicinity part (part on the composite fiber side) and an external force is applied to the exposed island part. Is prevented from tearing, and the durability of the brush bristle material is greatly improved. In other words, the island part of the sea-island composite fiber is unevenly distributed in a portion near the central part other than the outer peripheral surface forming part formed by the sea part having the predetermined thickness or more in the cross section of the sea-island composite fiber, Since the unevenly distributed island part is exposed at the tip of the bristle material, the exposed island part has characteristics such as soft touch that does not damage the object to be cleaned, and the dirt scraping performance The excellent durability by the outer peripheral surface formation part which consists of the sea part more than predetermined thickness is implement | achieved, making use of the advantage that the outstanding cleaning effect including was acquired.
　上記本発明に係るブラシ用毛材においては、上記外周面形成部直近の上記エッジ付島部の少なくとも一つのエッジ部が（望ましくは外周面形成部直近の全てのエッジ付島部のエッジ部が）上記海島複合繊維の径方向外方に向けられていることが好ましい。このように構成すれば、エッジ付島部のエッジ部がブラシの使用に際してより効果的にエッジ部による汚れの掻き取り性能を発揮でき、汚れの掻き取り性能まで含めた清掃性がより一層向上される。 In the bristle material for brushes according to the present invention, at least one edge portion of the edge-attached island portion in the immediate vicinity of the outer peripheral surface forming portion (preferably the edge portions of all the edge-attached island portions in the immediate vicinity of the outer peripheral surface forming portion are present). ) It is preferably directed outward in the radial direction of the sea-island composite fiber. If comprised in this way, the edge part of an island part with an edge can exhibit the dirt scraping performance by an edge part more effectively at the time of use of a brush, and the cleaning nature including dirt scraping performance is further improved. The
　また、上記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における隣接島部間距離が０．５～５０μｍの範囲にあることが好ましく、より好ましくは、１～３０μｍの範囲である。隣接島部間距離が０．５μｍよりも短いと、海島複合繊維の海部を溶解させて繊維端部の島部を露出させる際に、溶け残りにより露出島部の分岐不良が生じるおそれがあり、露出島部の分岐不良が生じると、前述の優れた清掃性や優れた触感等が損なわれるおそれがある。隣接島部間距離が５０μｍを超えると、露出島部の分岐不良が生じるおそれは無くなるものの、掻き取り等により露出島部部分に保持した汚れが隣接島部間をすり抜けやすくなり、その分清掃性が低下するおそれがある。 In the brush bristle material according to the present invention, the distance between adjacent islands in the cross section of the sea-island composite fiber is preferably in the range of 0.5 to 50 μm, more preferably in the range of 1 to 30 μm. It is. If the distance between adjacent islands is shorter than 0.5 μm, when the sea part of the sea-island composite fiber is dissolved and the island part of the fiber end part is exposed, there is a possibility that a branch failure of the exposed island part may occur due to undissolved residue. When the branch failure of an exposed island part arises, there exists a possibility that the above-mentioned outstanding cleaning property, the outstanding tactile sense, etc. may be impaired. If the distance between adjacent islands exceeds 50 μm, there will be no risk of branch failure in the exposed islands, but dirt held on the exposed islands due to scraping etc. will easily pass through between adjacent islands, and the cleaning performance is accordingly increased. May decrease.
　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、上記外周面形成部直近のエッジ付島部の外接円の直径Ｄｉは１０～３００μｍの範囲にあることが好ましく、より好ましくは、２０～１００μｍの範囲である。このエッジ付島部の径が１０μｍ未満であると、その露出島部の腰が弱くなりすぎて、エッジ部による汚れ掻き取り効果（以下、単にエッジ効果と言うこともある）に必要な腰の強さが得られにくくなるおそれがある。エッジ付島部の径が３００μｍ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、このエッジ付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 brush bristle material according to the present invention, the diameter Di of the circumscribed circle of the edged island portion immediately adjacent to the outer peripheral surface forming portion is preferably in the range of 10 to 300 μm, more preferably 20 to 100 μm. Range. If the diameter of the island part with an edge is less than 10 μm, the waist of the exposed island part becomes too weak, and the waist necessary for the dirt scraping effect by the edge part (hereinafter sometimes referred to simply as the edge effect) There is a risk that it is difficult to obtain strength. When the diameter of the island part with the edge is larger than 300 μm, the exposed island part becomes too strong, and it becomes difficult to obtain an excellent cleaning property for fine parts such as a space between teeth, and it is also difficult to obtain a soft tactile sensation. There is a risk. In addition, about the diameter of this island part with an edge, not all island parts need to be the same thickness.
　また、上記海島複合繊維の横断面における上記エッジ付島部の数としては、５以上であることが好ましいが、それよりも少なくても、例えば、上記エッジ付島部の数が４あるいは３等であってもよい。エッジ付島部の数のより好ましい範囲は８以上であり、さらに好ましい範囲は１０以上である。このエッジ付島部の数を５以上とすることにより、その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 with edges in the cross section of the sea-island composite fiber is preferably 5 or more, but even if it is less than that, for example, the number of the island portions with edges is 4 or 3, etc. It may be. A more preferable range of the number of island portions with edges is 8 or more, and a more preferable range is 10 or more. By setting the number of island portions with edges to 5 or more, it becomes easier to entangle dirt by the exposed island portions, and the cleaning property is further improved, and the performance of retaining cosmetics, the foaming performance, and the like are required. Even in such a case, it becomes easy to exhibit those performances.
　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、とくにエッジ付島部の横断面形状についても、エッジ部を有する限り、各種形態例を後述するように、各種三角形や四角形、さらには他の多角形や星形、さらにはそれら以外の異形形状等、実質的に任意の形状に設定することが可能である。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, as for the cross-sectional shape of the island part of the sea-island composite fiber, especially the cross-sectional shape of the island part with an edge, as long as it has an edge part, as will be described later, various triangles, quadrangles, and other It can be set to a substantially arbitrary shape such as a polygon, a star, or any other irregular shape. 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。なお、島部の横断面形状（とくにエッジ付島部の横断面形状）を露出島部の先端部まで実質的にそのまま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. In addition, the form in which the cross-sectional shape of the island part (especially the cross-sectional shape of the island part with an edge) is formed in a shape that is substantially maintained as it is to the tip part of the exposed island part is, for example, only for the sea part It can be achieved by constituting the resin with a resin that dissolves in the solution and making the island part with a resin that does not dissolve in the drug.
　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ないソフトな触感等の特性と汚れの掻き取り性能まで含めた優れた清掃性を兼ね備え、しかも耐久性に優れた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 combines the above-mentioned characteristics such as the soft touch that does not damage the object to be cleaned and the excellent cleaning properties including the dirt scraping performance, and the bristle material with excellent durability. Since it is used, it is particularly suitable as a toothbrush, a brush for precision cleaning, a face-washing brush, a 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、１～２０ｍｍの範囲、さらに好ましくは、５～１５ｍｍ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 from 1 to 20 mm, and more preferably from 5 to 15 mm.
　上述したような本発明に係るブラシ用毛材は、とくに前述した特許文献３に記載されているような、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を作製する技術を用いて、意図的に作製することも可能である。但し、前述した特許文献３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を作製することができるので、より好ましい。 As described above, the bristle material for brushes according to the present invention is designed to be substantially free 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 Document 3 described above. It can be intentionally made using techniques that can be used. Alternatively, a technique for producing a sea-island composite fiber using a conventionally known so-called pipe-type sea-island composite base (a base in which island components are finely divided by a pipe group and distributed in a predetermined state in the sea component). It can also be made intentionally. However, it is more preferable to use the technique described in Patent Document 3 described above because the target sea-island composite fiber can be produced more easily and with higher accuracy.
　すなわち、本発明に係るブラシ用毛材の製造方法は、少なくとも２成分以上のポリマーによって構成される複合ポリマー流を吐出するための複合口金であり、各ポリマー成分を計量する複数の計量孔を有する計量板、複数の計量孔からの吐出ポリマー流を合流する合流溝１に複数の分配孔１が穿設されている分配板１、前記分配孔１からの複数の吐出ポリマー流を合流する合流溝２に複数の分配孔２が穿設されている分配板２、および吐出板を有する複合口金を用いて、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を作製し、該海島複合繊維を用いて、上述したような本発明に係るブラシ用毛材を製造することを特徴とする方法からなる。 That is, the method for producing a bristle material for a brush according to the present invention is a composite base for discharging a composite polymer flow composed of at least two polymers, and has a plurality of measuring holes for measuring each polymer component. A distribution plate 1 in which a plurality of distribution holes 1 are formed in a confluence groove 1 that merges discharge polymer flows from a plurality of measurement holes, a confluence groove in which a plurality of discharge polymer flows from the distribution holes 1 are combined A sea-island composite fiber made of two or more kinds of resins having different drug dissolution rates is produced using a composite base having a distribution plate 2 having a plurality of distribution holes 2 formed in 2 and a discharge plate, and the sea-island composite It consists of the method characterized by manufacturing the bristle material for brushes which concerns on this invention as mentioned above using a fiber.
　このように、本発明によれば、被清掃物を傷つけないソフトな触感等の特性と汚れの掻き取り性能まで含めた優れた清掃性を兼ね備え、しかも耐久性に優れたブラシ用毛材を提供することができる。 As described above, according to the present invention, there is provided a brush bristle material having both excellent characteristics such as a soft tactile sensation that does not damage an object to be cleaned, and excellent cleaning properties including dirt scraping performance and excellent durability. can do.
　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.
　さらに、本発明によれば、上記のようなブラシ用毛材をより容易にかつより高精度に製造することが可能な方法を提供することができる Furthermore, according to the present invention, it is possible to provide a method capable of manufacturing the bristle material for brush as described above more easily and with higher accuracy.
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）。海島複合繊維４は、図１（Ｂ）に示すように、エッジ部３ｂを備えた横断面形状のエッジ付島部３ｃを複数該海島複合繊維４の外周面近傍に有しており、図示例では、全ての島部３が同じ横断面三角形のエッジ付島部３ｃに形成されており、それら全てのエッジ付島部３ｃが、図１（Ａ）に示すように、海島複合繊維４の長手方向一端部または両端部において露出島部３ａに形成されている。島部３が複数の横断面形状の島部からなる場合には、上記のようなエッジ付島部３ｃとそれ以外の形態の島部が混在していてもよい（この例については後述する）。図示例では、同じ横断面三角形の６つのエッジ付島部３ｃのエッジ部３ｂは、全て、海島複合繊維４の径方向外方、とくに海島複合繊維４の半径方向の線上の外方に向けられており、各エッジ部３ｂの繊維径方向先端位置は、横断面内の実質的に同一の円上の位置（破線で示した円の位置）に配置され、全てのエッジ部３ｂが優れた汚れの掻き取り効果を発揮できるようになっている。換言すれば、６つのエッジ付島部３ｃは、各エッジ部３ｂを海島複合繊維４の径方向外方に向けて、同心円上に配置されている。 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). As shown in FIG. 1 (B), the sea-island composite fiber 4 has a plurality of edge-attached island portions 3c each having an edge portion 3b in the vicinity of the outer peripheral surface of the sea-island composite fiber 4. Then, all the island parts 3 are formed in the island part 3c with an edge of the same cross-sectional triangle, and all these island parts with an edge 3c are longitudinal directions of the sea-island composite fiber 4 as shown in FIG. The exposed island 3a is formed at one or both ends in the direction. When the island part 3 consists of an island part of a some cross-sectional shape, the above-mentioned island part 3c with an edge and the island part of other forms may be mixed (this example is mentioned later). . In the illustrated example, the edge portions 3b of the six edged island portions 3c having the same triangular cross section are all directed outward in the radial direction of the sea-island composite fiber 4, in particular, outward on the radial line of the sea-island composite fiber 4. The tip positions of the edge portions 3b in the fiber radial direction are arranged at substantially the same circle positions (circle positions indicated by broken lines) in the cross section, and all the edge portions 3b have excellent dirt. The scraping effect of can be demonstrated. In other words, the six edged island portions 3 c are arranged on concentric circles with each edge portion 3 b facing outward in the radial direction of the sea-island composite fiber 4.
　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偏在されている。そして、海島複合繊維４の横断面における、外周面形成部５直近のエッジ付島部３ｃの外接円６の直径Ｄｉと外周面形成部５の海部２の厚みＴｓとの比率Ｔｓ／Ｄｉが０．３以上となるように、好ましくは０．５以上、さらに好ましくは０．８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３に記載されているような、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。より詳しくは、少なくとも２成分以上のポリマーによって構成される複合ポリマー流を吐出するための複合口金であり、各ポリマー成分を計量する複数の計量孔を有する計量板、複数の計量孔からの吐出ポリマー流を合流する合流溝１に複数の分配孔１が穿設されている分配板１、前記分配孔１からの複数の吐出ポリマー流を合流する合流溝２に複数の分配孔２が穿設されている分配板２、さらには必要に応じて、上流側の分配孔からの複数の吐出ポリマー流を合流する合流溝に複数の分配孔が穿設されている分配板３以降の分配板、および最下流側の分配板からのポリマーを吐出する吐出板を有する複合口金を用いて、薬剤溶解速度の異なる２種類以上の樹脂からなる上記のような海島複合繊維４を作製することができる（特許文献３にはこのような複合口金の各種形態が例示されている）。このような製造方法において、とくに露出島部３ａを容易に所望の形状のエッジ付島部３ｃに形成でき、かつ、安定的に紡糸可能となる。その海島複合繊維４を用いて、上述したようなブラシ用毛材１を製造することができる。あるいは、前述したように、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。 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 a portion near the center part other than the outer peripheral surface forming part 5. In the cross section of the sea-island composite fiber 4, the ratio Ts / Di between the diameter Di of the circumscribed circle 6 of the island part 3c with the edge closest to the outer peripheral surface forming part 5 and the thickness Ts of the sea part 2 of the outer peripheral surface forming part 5 is 0. The sea-island composite fiber 4 is produced so that it becomes 0.5 or more, preferably 0.5 or more, and more preferably 0.8 or more. The sea-island composite fiber 4 having such a form 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 Document 3 described above. Can be made intentionally using a simple technique. More specifically, it is a composite base for discharging a composite polymer flow composed of at least two components of a polymer, a measuring plate having a plurality of measuring holes for measuring each polymer component, and a discharge polymer from the plurality of measuring holes A distribution plate 1 in which a plurality of distribution holes 1 are formed in a confluence groove 1 where the flow is merged, and a plurality of distribution holes 2 are formed in a confluence groove 2 where a plurality of discharged polymer flows from the distribution holes 1 are merged. Distribution plate 2, and further, if necessary, a distribution plate after distribution plate 3 in which a plurality of distribution holes are formed in a merging groove for merging a plurality of discharge polymer flows from an upstream distribution hole, and The above-mentioned sea-island composite fiber 4 made of two or more kinds of resins having different drug dissolution rates can be produced using a composite die having a discharge plate for discharging a polymer from the distribution plate on the most downstream side (patent) Reference 3 includes Various forms of composite spinneret is illustrated as). In such a manufacturing method, in particular, the exposed island portion 3a can be easily formed into the island portion with an edge 3c having a desired shape, and can be stably spun. The brush bristle material 1 as described above can be produced using the sea-island composite fiber 4. Alternatively, as described above, a sea-island composite fiber 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). 4 can also be produced.
　また、本実施形態においては、図１（Ｂ）に示すように、海島複合繊維４の横断面における隣接島部３間距離（図示例では、隣接エッジ付島部３ｃ間距離）ｄが０．５～５０μｍの範囲に，より好ましくは、１～３０μｍの範囲に設定されている。これによって、前述したように、海島複合繊維４の海部２を溶解させて繊維端部の島部３を露出させる際に、溶け残りにより露出島部３ａの分岐不良が生じることが回避されているとともに、露出島部３ａの配置部分内に保持された汚れが隣接島部間をすり抜け、清掃性が低下することが回避されている。 Further, in the present embodiment, as shown in FIG. 1B, the distance between adjacent island portions 3 in the cross section of the sea-island composite fiber 4 (distance between adjacent edge-attached island portions 3c in the illustrated example) d is 0. It is set in the range of 5 to 50 μm, more preferably in the range of 1 to 30 μm. As a result, as described above, when the sea part 2 of the sea-island composite fiber 4 is dissolved to expose the island part 3 at the fiber end, it is avoided that a defective branch of the exposed island part 3a occurs due to undissolved residue. At the same time, it is avoided that dirt held in the arrangement portion of the exposed island portion 3a passes between adjacent island portions and the cleaning property is deteriorated.
　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。とくに外周面形成部５直近の島部３（露出島部３ａ）は、エッジ付島部３ｃに形成されており、その外接円６の直径Ｄｉと外周面形成部５の海部２の厚みＴｓとの比率Ｔｓ／Ｄｉが０．３以上となるように形成されている。この外接円６の直径Ｄｉの好ましい範囲、海島複合繊維４の横断面におけるエッジ付島部３ｃ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 particular, the island part 3 (exposed island part 3a) immediately adjacent to the outer peripheral surface forming part 5 is formed in the island part 3c with an edge, and the diameter Di of the circumscribed circle 6 and the thickness Ts of the sea part 2 of the outer peripheral surface forming part 5 The ratio Ts / Di is formed to be 0.3 or more. A preferable range of the diameter Di of the circumscribed circle 6, a preferable range of the number of island portions with edges 3c in the cross section of the sea-island composite fiber 4, and a preferable range of the diameter of the sea-island composite fiber 4 are 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、露出島部３ａが、エッジ付島部３ｃに形成されていることで、とくにそのエッジ部３ｂによって優れた汚れの掻き取り性能が発揮され、一層優れた清掃性が達成される。また、外周面形成部５の厚みＴｓと外周面形成部直近のエッジ付島部３ｃの外接円直径Ｄｉとの比率Ｔｓ／Ｄｉが０．３以上とされることにより、外周面形成部直近のエッジ付島部３ｃからなる露出島部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 exposed island part 3a is formed in the island part 3c with an edge, the scraping performance of the dirt which was excellent especially by the edge part 3b is exhibited, and the further outstanding cleaning property is achieved. Further, the ratio Ts / Di between the thickness Ts of the outer peripheral surface forming portion 5 and the circumscribed circle diameter Di of the edged island portion 3c in the immediate vicinity of the outer peripheral surface forming portion is set to 0.3 or more, so that The exposed island portion 3a composed of the island portion 3c with the edge is supported at the base portion in a state covered with the sea portion 2 having a sufficient thickness, and even when an external force is repeatedly applied to the exposed island portion 3a, The sea part 2 that supports the exposed island part 3a due to external force is prevented from tearing, and high durability of the bristle material 1 for 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。そして、露出島部２３がエッジ付島部に形成されていることにより、優れた汚れの掻き取り効果が得られ、一層優れた清掃性が発現される。また、前述の実施形態１に比べ、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. And since the exposed island part 23 is formed in the island part with an edge, the outstanding scraping off effect is acquired and the further outstanding cleaning property is expressed. Moreover, compared with the above-mentioned Embodiment 1, since the front-end | tip part of the exposure island part 23 is sharp, it is possible to exhibit the outstanding cleaning effect also to a finer part.
　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２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 2 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おり、外周面形成部直近のエッジ付島部の外接円直径Ｄｉと外周面形成部の海部の厚みＴｓとの比率Ｔｓ／Ｄｉが０．３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, in the cross section of the sea-island composite fiber, the island portion is unevenly distributed in a portion near the central portion other than the outer peripheral surface forming portion, and the edged island portion in the immediate vicinity of the outer peripheral surface forming portion. As long as the ratio Ts / Di between the circumscribed circle diameter Di and the sea part thickness Ts of the outer peripheral surface forming part is 0.3 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とエッジ付島部３３を有する海島複合繊維３４に形成されているとともに、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。符号３６はエッジ付島部３３の外接円を示している。図４（Ｂ）に示すブラシ用毛材４１では、海部４２とエッジ付島部４３を有する海島複合繊維４４に形成されているとともに、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、図４（Ａ）に示した形態に比べ、エッジ付島部４３の数が５とされている。符号４６はエッジ付島部４３の外接円を示している。図４（Ｃ）に示すブラシ用毛材５１では、海部５２とエッジ付島部５３を有する海島複合繊維５４に形成されているとともに、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、図４（Ａ）に示した形態に比べ、エッジ付島部５３の数が３とされている。符号５６はエッジ付島部５３の外接円を示している。図４（Ｄ）に示すブラシ用毛材６１では、海部６２とエッジ付島部６３を有する海島複合繊維６４に形成されているとともに、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、図４（Ｂ）に示した形態に比べ、エッジ付島部６３の横断面形状が五角形とされ、外周面形成部６５直近のエッジ付島部６３の数が５とされるとともに、海島複合繊維６４の横断面中央部にもエッジ付島部６３が配置されている。符号６６はエッジ付島部６３の外接円を示している。図４（Ｅ）に示すブラシ用毛材７１では、海部７２とエッジ付島部７３を有する海島複合繊維６４に形成されているとともに、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、図４（Ｄ）に示した形態に比べ、エッジ付島部７３の横断面形状が四角形とされている。符号７６はエッジ付島部７３の外接円を示している。 The brush bristle material 31 shown in FIG. 4 (A) is substantially the same as the form shown in FIG. 1 (B), and is formed in a sea-island composite fiber 34 having a sea part 32 and an island part 33 with an edge. In addition, it has an outer peripheral surface forming portion 35 having a predetermined thickness or more and consisting only of the sea portion. Reference numeral 36 denotes a circumscribed circle of the island part 33 with the edge. The brush bristle material 41 shown in FIG. 4 (B) is formed on the sea-island composite fiber 44 having the sea part 42 and the island part 43 with the edge, and has an outer peripheral surface forming part 45 having only a sea part and having a predetermined thickness or more. Therefore, the number of the edge-attached island portions 43 is five as compared with the embodiment shown in FIG. Reference numeral 46 denotes a circumscribed circle of the edged island portion 43. The brush bristle material 51 shown in FIG. 4 (C) is formed on a sea-island composite fiber 54 having a sea part 52 and an island part 53 with an edge, and has an outer peripheral surface forming part 55 having a predetermined thickness or more consisting only of the sea part. Thus, the number of edge-attached island portions 53 is three as compared to the configuration shown in FIG. Reference numeral 56 indicates a circumscribed circle of the island part 53 with the edge. The brush bristle material 61 shown in FIG. 4 (D) is formed on a sea-island composite fiber 64 having a sea part 62 and an island part 63 with an edge, and has an outer peripheral surface forming part 65 having only a sea part and having a predetermined thickness or more. Compared to the form shown in FIG. 4B, the cross-sectional shape of the edge-attached island portion 63 is a pentagon, and the number of the edge-attached island portions 63 closest to the outer peripheral surface forming portion 65 is five. The island part 63 with an edge is also arranged at the center of the cross section of the sea-island composite fiber 64. Reference numeral 66 denotes a circumscribed circle of the edged island part 63. The brush bristle material 71 shown in FIG. 4 (E) is formed on the sea-island composite fiber 64 having the sea part 72 and the island part 73 with the edge, and has an outer peripheral surface forming part 75 having only a sea part and having a predetermined thickness or more. Compared with the embodiment shown in FIG. 4D, the cross-sectional shape of the edge-attached island portion 73 is a quadrangle. Reference numeral 76 indicates a circumscribed circle of the island part 73 with the edge.
　また、図４（Ｆ）に示すブラシ用毛材８１では、海部８２とエッジ付島部８３を有する海島複合繊維８４に形成されているとともに、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、図４（Ａ）に示した形態に比べ、横断面三角形のエッジ付島部８３の横断面形状が、海島複合繊維８４の径方向外方に向けられたエッジ部がより尖鋭な形状に形成されている。符号８６はエッジ付島部８３の外接円を示している。図４（Ｇ）に示すブラシ用毛材９１では、海部９２とエッジ付島部９３を有する海島複合繊維９４に形成されているとともに、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、図４（Ｅ）に示した形態に比べ、エッジ付島部９３の横断面形状が、尖鋭なエッジ部を有する平行四辺形に形成されている。符号９６はエッジ付島部９３の外接円を示している。図４（Ｈ）に示すブラシ用毛材１０１では、海部１０２とエッジ付島部１０３を有する海島複合繊維１０４に形成されているとともに、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、図４（Ａ）に示した形態に比べ、エッジ付島部１０３の横断面形状が星形とされ、外周面形成部１０５直近のエッジ付島部１０３の数は同じ６とされているが、海島複合繊維１０４の横断面中央部にもエッジ付島部１０３が配置されている。符号１０６はエッジ付島部１０３の外接円を示している。図４（Ｉ）に示すブラシ用毛材１１１では、海部１１２とエッジ付島部１１３を有する海島複合繊維１１４に形成されているとともに、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、図４（Ａ）に示した形態に比べ、エッジ付島部１１３の横断面形状が円の一部を切り取ったダブルエッジ部状態の異形横断面形状とされ、外周面形成部１１５直近のエッジ付島部１１３の数が４とされている。符号１１６はエッジ付島部１１３の外接円を示している。図４（Ｊ）に示すブラシ用毛材１２１では、海部１２２とエッジ付島部１２３を有する海島複合繊維１２４に形成されているとともに、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、図４（Ａ）に示した形態に比べ、エッジ付島部１２３の横断面形状が雨滴状でシングルエッジ部状態の異形横断面形状とされている。符号１２６はエッジ付島部１２３の外接円を示している。さらに、図４（Ｋ）に示すブラシ用毛材１３１では、海部１３２とエッジ付島部１３３を有する海島複合繊維１３４に形成されているとともに、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、図４（Ｅ）に示した形態に比べ、外周面形成部１３５直近のエッジ付島部１３３の横断面形状が三日月状でダブルエッジ部状態の異形横断面形状とされているとともに、海島複合繊維１３４の横断面中央部に配置された島部１３７は横断面四角形の形状とされている。符号１３６はエッジ付島部１３３の外接円を示している。さらにまた、図４（Ｌ）に示すブラシ用毛材１４１では、海部１４２とエッジ付島部１４３を有する海島複合繊維１４４に形成されているとともに、海部のみからなる所定厚み以上の外周面形成部１４５を有しており、図４（Ｉ）に示した形態に比べ、外周面形成部１４５直近のエッジ付島部１４３の横断面形状が四分の一円状で周方向両側にエッジ部を有する状態の異形横断面形状とされている。符号１４６はエッジ付島部１４３の外接円を示している。 Moreover, in the bristle material 81 for brushes shown to FIG. 4 (F), while forming in the sea-island composite fiber 84 which has the sea part 82 and the island part 83 with an edge, the outer peripheral surface formation part 85 more than predetermined thickness which consists only of a sea part. Compared to the embodiment shown in FIG. 4A, the cross-sectional shape of the edge-attached island portion 83 having a triangular cross-section is larger, and the edge portion directed outward in the radial direction of the sea-island composite fiber 84 is more It is formed in a sharp shape. Reference numeral 86 denotes a circumscribed circle of the island part 83 with the edge. The bristle material 91 for brushes shown in FIG. 4G is formed on a sea-island composite fiber 94 having a sea part 92 and an island part 93 with an edge, and has an outer peripheral surface forming part 95 having a predetermined thickness or more consisting only of the sea part. Compared to the form shown in FIG. 4E, the cross-sectional shape of the edge-attached island portion 93 is formed in a parallelogram having a sharp edge portion. Reference numeral 96 denotes a circumscribed circle of the island part 93 with the edge. The brush bristle material 101 shown in FIG. 4 (H) is formed on a sea-island composite fiber 104 having a sea part 102 and an island part 103 with an edge, and has an outer peripheral surface forming part 105 having only a sea part and having a predetermined thickness or more. Compared to the form shown in FIG. 4A, the cross-sectional shape of the edge-attached island portion 103 is a star shape, and the number of the edge-attached island portions 103 closest to the outer peripheral surface forming portion 105 is six. However, the island part 103 with an edge is also arranged at the center of the cross section of the sea-island composite fiber 104. Reference numeral 106 denotes a circumscribed circle of the edged island portion 103. The brush bristle material 111 shown in FIG. 4 (I) is formed on a sea-island composite fiber 114 having a sea part 112 and an island part 113 with an edge, and has an outer peripheral surface forming part 115 having a predetermined thickness or more, consisting of only the sea part. Compared with the form shown in FIG. 4A, the cross-sectional shape of the edge-attached island portion 113 is an irregular cross-sectional shape in a double-edge portion state in which a part of a circle is cut off, and the outer peripheral surface forming portion 115 is formed. The number of the nearest edge-attached island portions 113 is four. Reference numeral 116 denotes a circumscribed circle of the edged island portion 113. The brush bristle material 121 shown in FIG. 4 (J) is formed on the sea-island composite fiber 124 having the sea part 122 and the island part 123 with the edge, and has an outer peripheral surface forming part 125 having only a sea part and having a predetermined thickness or more. Compared with the embodiment shown in FIG. 4A, the cross-sectional shape of the edge-attached island portion 123 is a raindrop-like and has a deformed cross-sectional shape in a single edge portion state. Reference numeral 126 indicates a circumscribed circle of the edged island portion 123. Furthermore, in the bristle material 131 for brushes shown in FIG. 4 (K), it is formed on the sea-island composite fiber 134 having the sea part 132 and the island part 133 with the edge, and the outer peripheral surface forming part 135 having only a sea part and having a predetermined thickness or more. Compared to the form shown in FIG. 4 (E), the cross-sectional shape of the edge-attached island portion 133 immediately adjacent to the outer peripheral surface forming portion 135 is a crescent shape and an irregular cross-sectional shape in a double edge portion state. In addition, the island portion 137 disposed in the center of the cross section of the sea-island composite fiber 134 has a quadrangular cross section. Reference numeral 136 indicates a circumscribed circle of the island part with edge 133. Furthermore, in the bristle material 141 for brushes shown in FIG. 4 (L), an outer peripheral surface forming portion having a predetermined thickness or more, which is formed of the sea-island composite fiber 144 having the sea part 142 and the island part 143 with an edge, and is composed only of the sea part. Compared with the embodiment shown in FIG. 4I, the cross-sectional shape of the edge-attached island portion 143 in the immediate vicinity of the outer peripheral surface forming portion 145 is a quarter circle, and edge portions are provided on both sides in the circumferential direction. It has an irregular cross-sectional shape in a state of having. Reference numeral 146 indicates a circumscribed circle of the edged island portion 143.
　さらに、図５に、海島複合繊維自体の各種横断面形状を例示する。図５（Ａ）に示すブラシ用毛材１５１では、海部１５２とエッジ付島部１５３を有し、海部のみからなる所定厚み以上の外周面形成部１５５を有する海島複合繊維１５４の横断面形状(外形横断面形状)が５葉形の異形横断面形状に形成されている。図５（Ｂ）に示すブラシ用毛材１６１では、海部１６２とエッジ付島部１６３を有し、海部のみからなる所定厚み以上の外周面形成部１６５を有する海島複合繊維１６４の横断面形状(外形横断面形状)が三角形の横断面形状に形成されている。図５（Ｃ）に示すブラシ用毛材１７１では、海部１７２とエッジ付島部１７３を有し、海部のみからなる所定厚み以上の外周面形成部１７５を有する海島複合繊維１７４の横断面形状(外形横断面形状)が四角形の横断面形状に形成されている。図５（Ｄ）に示すブラシ用毛材１８１では、海部１８２とエッジ付島部１８３を有し、海部のみからなる所定厚み以上の外周面形成部１８５を有する海島複合繊維１８４の横断面形状(外形横断面形状)が３葉形の異形横断面形状に形成されている。このように、海島複合繊維の横断面形状においても、各種の形態を採り得る。 Further, FIG. 5 illustrates various cross-sectional shapes of the sea-island composite fiber itself. In the bristle material 151 for brushes shown in FIG. 5A, the cross-sectional shape of the sea-island composite fiber 154 having the sea part 152 and the island part 153 with an edge, and having the outer peripheral surface forming part 155 having only a sea part and having a predetermined thickness or more ( (Outside cross-sectional shape) is formed in a five-leaf shaped irregular cross-sectional shape. In the bristle material 161 for brushes shown in FIG. 5 (B), the cross-sectional shape of the sea-island composite fiber 164 having the sea part 162 and the edged island part 163 and having the outer peripheral surface forming part 165 having a predetermined thickness or more consisting of only the sea part ( The outer cross-sectional shape) is formed in a triangular cross-sectional shape. In the bristle material for brush 171 shown in FIG. 5C, the cross-sectional shape of the sea-island composite fiber 174 having the sea part 172 and the edged island part 173, and having the outer peripheral surface forming part 175 having a predetermined thickness or more consisting only of the sea part ( (Outer cross-sectional shape) is formed in a rectangular cross-sectional shape. In the bristle material 181 for brushes shown in FIG. 5D, the cross-sectional shape of the sea-island composite fiber 184 having the sea part 182 and the island part 183 with an edge, and having the outer peripheral surface forming part 185 having a predetermined thickness or more consisting only of the sea part ( (Outside cross-sectional shape) is formed in a three-leaf shaped irregular cross-sectional shape. Thus, various forms can be adopted also in the cross-sectional shape of the sea-island composite fiber.
　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１～１０、比較例１、２
［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、エッジ付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 10, Comparative Examples 1 and 2
[Production of brush hair]
As raw materials, polybutylene terephthalate (PBT, “Toraycon” (registered trademark) 1100SW manufactured by Toray Industries, Inc.), 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, Inc., polybutylene naphthalate (PBN, manufactured by Toyobo, AE-500) ) Was prepared under the recommended conditions. The sea island type 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 the island parts are as shown in Table 2, and the island part with the edge is unevenly distributed in the part near the central part in the sea part. The composite fiber 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。また、比較例２では、実施例９と同様の組成の海島複合繊維であるが、島部の横断面形状を円形とし、エッジ部を持たない形状のものに形成した。 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. In Comparative Example 2, the sea-island composite fibers having the same composition as in Example 9 were formed in a shape in which the cross-sectional shape of the island part was circular and had no edge part.
［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
３ｂ　エッジ部
３ｃ　エッジ付島部
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、１４１、１５１、１６１、１７１、１８１　ブラシ用毛材
３２、４２、５２、６２、７２、８２、９２、１０２、１１２、１２２．１３２、１４２、１５２、１６２、１７２、１８２　海部
３３、４３、５３、６３、７３、８３、９３、１０３、１１３、１２３．１３３、１４３、１５３、１６３、１７３、１８３　エッジ付島部
３４、４４、５４、６４、７４、８４、９４、１０４、１１４、１２４．１３４、１４４、１５４、１６４、１７４，１８４　海島複合繊維
３５、４５、５５、６５、７５、８５、９５、１０５、１１５、１２５．１３５、１４５、１５５、１６５、１７５，１８５　外周面形成部
１３７　島部 DESCRIPTION OF SYMBOLS 1,21 Brush bristle material 2 Sea part 3 Island part 3a, 23 Exposed island part 3b Edge part 3c Edged island part 4, 22 Sea-island composite fiber 5 Outer surface formation part 11 Brush bristle material 12 Toothbrush component 12a Head part surface Side member 12b Head part back 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, 141, 151, 161, 171 and 181 Brush hair material 32, 42, 52, 62, 72, 82, 92, 102, 112, 122.132, 142, 152, 162, 172, 182 Sea part 33, 43, 53, 63, 73, 83 93, 103, 113, 123.133, 143, 153, 163, 173, 183 Edged islands 34, 44, 54, 64, 74, 84, 94, 1 4, 114, 124.134, 144, 154, 164, 174, 184 Sea- island composite fiber 35, 45, 55, 65, 75, 85, 95, 105, 115, 125.135, 145, 155, 165, 175 185 Outer peripheral surface forming part 137 Island part

Claims (7)

  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、前記海島複合繊維はエッジ部を備えた横断面形状のエッジ付島部を複数該海島複合繊維の外周面近傍に有し、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、該海島複合繊維の横断面における、前記外周面形成部直近の前記エッジ付島部の外接円の直径Ｄｉと前記外周面形成部の海部の厚みＴｓとの比率Ｔｓ／Ｄｉが０．３以上であ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 longitudinal ends of a sea-island composite fiber made of two or more kinds of resins having different drug dissolution rates are exposed, the sea-island composite fiber having a cross section A plurality of island parts with edges in the vicinity of the outer peripheral surface of the sea-island composite fiber, 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. The ratio Ts / Di between the diameter Di of the circumscribed circle of the island part with an edge immediately adjacent to the outer peripheral surface forming part and the thickness Ts of the sea part of the outer peripheral surface forming part is 0.3 or more Hair for hair.
  2. 　前記外周面形成部直近の前記エッジ付島部の少なくとも一つのエッジ部が前記海島複合繊維の径方向外方に向けられている。請求項１に記載のブラシ用毛材。 At least one edge portion of the island portion with the edge immediately adjacent to the outer peripheral surface forming portion is directed outward in the radial direction of the sea-island composite fiber. The bristle material for brushes according to claim 1.
  3. 　前記海島複合繊維の横断面における隣接島部間距離が０．５～５０μｍ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 bristle material according to claim 1 or 2, wherein the distance between adjacent islands in the cross section of the sea-island composite fiber is in the range of 0.5 to 50 µm.
  4. 　前記エッジ付島部の外接円の直径Ｄｉが１０～３００μｍ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 a diameter Di of a circumscribed circle of the island portion with an edge is in a range of 10 to 300 µm.
  5. 　前記海島複合繊維の横断面における前記エッジ付島部の数が５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 island portions with edges in a cross section of the sea-island composite fiber is 5 or more.
  6. 　請求項１～５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 5 is used at least in part.
  7. 　少なくとも２成分以上のポリマーによって構成される複合ポリマー流を吐出するための複合口金であり、各ポリマー成分を計量する複数の計量孔を有する計量板、複数の計量孔からの吐出ポリマー流を合流する合流溝１に複数の分配孔１が穿設されている分配板１、前記分配孔１からの複数の吐出ポリマー流を合流する合流溝２に複数の分配孔２が穿設されている分配板２、および吐出板を有する複合口金を用いて、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を作製し、該海島複合繊維を用いて請求項１～５のいずれかに記載のブラシ用毛材を製造することを特徴とするブラシ用毛材の製造方法。 A composite base for discharging a composite polymer stream composed of at least two or more polymers, a measuring plate having a plurality of measuring holes for measuring each polymer component, and a discharge polymer stream from the plurality of measuring holes being merged A distribution plate 1 in which a plurality of distribution holes 1 are formed in the merging groove 1, and a distribution plate in which a plurality of distribution holes 2 are formed in a merging groove 2 that merges a plurality of discharged polymer flows from the distribution holes 1. 6. A sea-island composite fiber composed of two or more types of resins having different drug dissolution rates is prepared using a composite die having a discharge plate, and the sea-island composite fiber, and the sea-island composite fiber is used. A method for producing a bristle material for a brush, comprising producing the bristle material for a brush.
PCT/JP2016/088358 2015-12-25 2016-12-22 Brush bristle material, brush using same, and manufacturing method for said brush bristle material WO2017111009A1 (en)

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Citations (4)

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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
JP2011174215A (en) * 2010-01-29 2011-09-08 Toray Ind Inc Composite spinneret
JP2011218088A (en) * 2010-04-14 2011-11-04 Toray Monofilament Co Ltd Bristle material for brush and brush

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Publication number Priority date Publication date Assignee Title
JP2623858B2 (en) 1989-09-12 1997-06-25 東レ株式会社 Brush fibers and brushes
JP4816037B2 (en) * 2005-12-02 2011-11-16 サンスター株式会社 toothbrush
CN102713034B (en) * 2010-01-29 2016-07-06 东丽株式会社 Island-in-sea type composite fiber, superfine fibre and composite spinning jete

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Publication number Priority date Publication date Assignee Title
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
JP2011174215A (en) * 2010-01-29 2011-09-08 Toray Ind Inc Composite spinneret
JP2011218088A (en) * 2010-04-14 2011-11-04 Toray Monofilament Co Ltd Bristle material for brush and brush

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