WO2017111011A1 - ブラシ用毛材及びそれを用いたブラシ - Google Patents

ブラシ用毛材及びそれを用いたブラシ Download PDF

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Publication number
WO2017111011A1
WO2017111011A1 PCT/JP2016/088360 JP2016088360W WO2017111011A1 WO 2017111011 A1 WO2017111011 A1 WO 2017111011A1 JP 2016088360 W JP2016088360 W JP 2016088360W WO 2017111011 A1 WO2017111011 A1 WO 2017111011A1
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WO
WIPO (PCT)
Prior art keywords
island
sea
brush
bristle material
composite fiber
Prior art date
Application number
PCT/JP2016/088360
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English (en)
French (fr)
Japanese (ja)
Inventor
山本健雄
土岐美鈴
木村敏明
増田正人
柴田剛志
山中博文
Original Assignee
東レ・モノフィラメント株式会社
東レ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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 CN201680076068.5A priority Critical patent/CN108495576A/zh
Priority to KR1020187019637A priority patent/KR20180098290A/ko
Priority to JP2017508120A priority patent/JP6903002B2/ja
Publication of WO2017111011A1 publication Critical patent/WO2017111011A1/ja

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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
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • 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 and a brush using the same.
  • 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 decreases, it is difficult to obtain excellent scraping performance of dirt and plaque due to the hair tips, the touch to the gums becomes too strong, and the gums are scratched. May be easier.
  • a hair tip with excellent cleaning effect for example, excellent hair tip penetration into the tooth neck, high scraping effect on the plaque, and improved durability of the hair tip Document 1 has a structure in which two types of resin layers are alternately stacked in a direction perpendicular to the axis of the bristle material, and one resin layer protrudes from the tip of the other resin layer at the bristle tip.
  • a toothbrush bristle material in which a plurality of slits are formed between one resin layer is disclosed.
  • sea island composite fibers are used as the hair material for the brush, and at the root part of the hair tip part of the hair material when used for the brush.
  • has a composite fiber structure in which sea-island components are integrated, and a bristle material for a brush having a structure in which a large number of islands are exposed and separated at the tip has been proposed (Patent Document 2).
  • a brush bristle material has been proposed in which the island portion of the sea-island composite fiber has an irregular cross-sectional shape to improve the scraping performance of dirt by the hair tip (Patent Document 3).
  • 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.
  • JP 2010-253107 A Japanese Patent Laid-Open No. 3-99604 JP 2011-218088 A JP 2011-174215 A
  • Patent Document 4 recently proposed while paying attention to the outstanding features and remaining problems of the bristle material for brushes as described in the conventional Patent Documents 1 to 3. 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 having excellent durability, and a brush using the same.
  • 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. It is a bristle material, and the cross section of the island part of the sea-island composite fiber is formed in a flat shape having a larger major axis than the minor axis, and an outer peripheral surface forming part that forms the outer peripheral surface of the sea-island composite fiber It is composed only of the sea part, and the ratio Ts / Dis between the short diameter Dis of the island part and the thickness Ts of the sea part of the outer peripheral surface forming part in the cross section of the sea-island composite fiber is 1.2 or more. Consists of features. This ratio Ts / Dis is preferably 1.5 or more, and more preferably 2.0 or more.
  • the plurality of exposed island parts having relatively low waists cause the hair tips to be 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. And since these island parts, especially the exposed island parts, are formed in a flat shape whose transverse section is larger in the major axis than in the minor axis, the elasticity necessary for scraping off dirt can be easily provided.
  • the flat tip has a spatula-like function, and can exhibit an excellent dirt scraping effect, particularly an excellent dirt scraping effect.
  • the outer peripheral surface formation part which forms the outer peripheral surface of a sea-island composite fiber is comprised only by a sea part, and in the cross section of a sea-island composite fiber, the short diameter Dis of the said flat-shaped island part nearest to an outer peripheral surface formation part and
  • Ts / Dis the sea surface thickness Ts of the outer peripheral surface forming part
  • the sea part is prevented from tearing, and the durability of the brush bristle material is greatly improved.
  • the island portion having a flat shape of the sea-island composite fiber is unevenly distributed in a portion near the central portion other than the outer peripheral surface forming portion formed by the sea portion having the predetermined thickness or more in the cross section of the sea-island composite fiber.
  • the unevenly distributed island portion is exposed at the tip of the bristle material, so that the exposed island portion has characteristics such as soft touch that does not damage the object to be cleaned, and dirt While utilizing the advantage that an excellent cleaning effect including scraping performance can be obtained, excellent durability is achieved by the outer peripheral surface forming portion composed of the sea portion having a predetermined thickness or more.
  • the ratio of major axis / minor axis of the flat island part is preferably 2 or more, more preferably 3 or more, and further preferably 5 or more.
  • the ratio of the major axis / minor axis of the island is 2 or more, the function of scraping off dirt by the spatula shape is improved, and the cleaning performance including the dirt scraping performance is further improved.
  • 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 having a relatively low waist may become too long, and the exposed island portion may be deformed too much, thereby cleaning the exposed island portion (for example, scraping off dirt). Effect) and massage effects such as gums may be insufficient.
  • the short island Dis of the flat shape is in the range of 10 to 300 ⁇ m, and more preferably in the range of 20 to 100 ⁇ m.
  • the short-diameter Dis of the flat island portion is less than 10 ⁇ m, the waist of the exposed island portion becomes too weak, and the strength of the waist necessary for the effect of scraping off dirt due to the spatula shape of the exposed island portion is It may be difficult to obtain.
  • the short diameter Dis of the flat island portion is larger than 300 ⁇ m, the exposed island portion becomes too strong, and it becomes difficult to obtain excellent cleaning properties for fine parts such as between teeth. There is a possibility that it is difficult to obtain a tactile sensation.
  • the short axis Dis of the flat-shaped island part not all the island parts may have the same short diameter.
  • the number of the islands having the flat shape in the cross section of the sea-island composite fiber is preferably 3 or more, more preferably 5 or more, and further preferably 7 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 sea-island composite fiber part itself becomes too strong when used for a brush, and the root of the exposed island part depends on the form of the exposed island part at the tip. There is a possibility that the sea-island composite fiber part in the part is strongly pressed against the object to be cleaned and the object to be cleaned is easily damaged.
  • 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 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 flat island part is formed into a shape that is substantially maintained as it is up to the tip of the exposed island part is formed of a resin that dissolves in the drug for dissolution only in the sea part. This can be achieved by constituting the 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 excellent in dirt and plaque scraping performance, a precision cleaning brush, 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 so that the size and arrangement of the island part relative to the sea part, the cross-sectional shape, the arrangement density, etc. can be designed substantially freely as described in Patent Document 4 mentioned 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 4 described above because the target sea-island composite fiber can be produced more easily and with higher accuracy.
  • the present invention has excellent cleanability including characteristics such as soft touch feeling that does not damage the object to be cleaned and scraping performance of dirt, and further, the island part is peeled off and the island part is held. It is possible to provide a bristle material for a brush excellent in durability that can prevent tearing of the sea part.
  • 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 sea-island composite fiber 4 is formed in a flat shape in which the cross section of the island part 3 is larger in the major axis than in the minor axis, and forms the outer peripheral surface of the sea-island composite fiber 4.
  • the outer peripheral surface forming part 5 is composed only of the sea part. In the cross section of the sea-island composite fiber 4, the ratio Ts / Dis between the short diameter Dis of the flat island part 3 and the sea part thickness Ts of the outer peripheral surface forming part 5 is 1.2 or more.
  • all the island portions 3 are formed into flat island portions 3, and the island portions 3 are arranged in parallel to each other with the flat shape direction being the same direction. More specifically, each island 3 has the same short diameter Dis, and a total of five islands 3 having different lengths are arranged. About the arrangement
  • 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 flat island portion 3 is unevenly distributed in a portion near the center other than the outer peripheral surface forming portion 5 in the cross section of the sea-island composite fiber 4.
  • the ratio Ts / Dis between the short diameter Dis of the island part 3 and the thickness Ts of the sea part of the outer peripheral surface forming part 5 is preferably 1.5 or more.
  • the sea-island composite fiber 4 is manufactured so as to be more preferably 2.0 or more.
  • the sea-island composite fiber 4 having such a form can be designed substantially freely with respect to the size, arrangement, cross-sectional shape, arrangement density, etc. of the island part relative to the sea part as described in Patent Document 4 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 4 includes Various forms of composite spinneret is illustrated as). Using such a manufacturing technique, in particular, the exposed island portion 3a can be easily formed into a spatula-shaped island portion with a desired flat 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 exposed island part 3a in the longitudinal direction edge part 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 does not melt
  • the exposed island portion 3a is formed in the same cross-sectional shape from the root portion to the tip portion.
  • the ratio Ts / Dis between the short diameter Dis of the island portion 3 and the thickness Ts of the sea portion of the outer peripheral surface forming portion 5 is 1.2 or more.
  • the preferable range of this ratio Ts / Dis, the preferable range of the number of island portions 3 in the cross section of the sea-island composite fiber 4, and the 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 exposed island part 3a is formed in the island part of a flat shape, the outstanding spatula-like function is expressed, dirt and plaque are scraped off favorably by the front-end
  • 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 spatula-shaped flat island part, dirt and plaque are scraped off favorably by the tip of the spatula-shaped flat exposed island part 23. Even better cleaning properties are exhibited.
  • 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 1 described above.
  • a circle in Table 1 indicates that the characteristic is equal to or higher than that of the object to be compared, and an ⁇ indicates that it is significantly superior to the object to be compared.
  • the outer peripheral surface forming part that forms the outer peripheral surface of the sea-island composite fiber in the cross section of the sea-island composite fiber is composed of only the sea part, and the island part is the central part other than the outer peripheral surface forming part.
  • the island section is unevenly distributed, and the cross section of the island portion is formed in a flat shape having a larger major axis than the minor axis, and the minor axis Dis of the island part and the thickness Ts of the sea part of the outer peripheral surface forming part.
  • the sea-island composite fiber can take various cross-sectional forms. Various forms are illustrated in FIGS. 4 and 5.
  • the brush bristle material 31 shown in FIG. 4 (A) is substantially the same as that shown in FIG. 1 (B), and is formed in a sea-island composite fiber 34 having a sea part 32 and a flat-shaped island part 33. In addition, it has an outer peripheral surface forming part 35 having a predetermined thickness or more and consisting only of the sea part.
  • the bristle material 41 for brushes shown in FIG. 4 (B) it is formed in a sea-island composite fiber 44 having a sea part 42 and a flat-shaped island part 43, and an outer peripheral surface forming part 45 having only a sea part and having a predetermined thickness or more.
  • a sea-island composite fiber 44 having a sea part 42 and a flat-shaped island part 43
  • an outer peripheral surface forming part 45 having only a sea part and having a predetermined thickness or more.
  • the number of flat island portions 43 is set to 6, and each island portion 43 has a major axis direction along the radius of the sea-island composite fiber 44. It is arranged in the direction.
  • an outer peripheral surface forming part 55 having a predetermined thickness or more consisting of only the sea part is formed on the sea-island composite fiber 54 having the sea part 52 and the island part 53 having a flat shape.
  • the number of island portions 53 having a flat shape is four.
  • the number of flat island parts 53 is three.
  • an outer peripheral surface is formed on the sea-island composite fiber 64 having the sea part 72 and the island part 73 having a flat shape, and has a predetermined thickness or more consisting only of the sea part.
  • each island portion 73 having a flat shape is arranged along the extending direction of the outer peripheral surface forming portion 75.
  • an outer peripheral surface forming portion 85 having a predetermined thickness or more consisting of only the sea portion is formed on the sea-island composite fiber 84 having the sea portion 82 and the island portion 83 having a flat shape.
  • the shape of the flat island portion 83 arranged along the extending direction of the outer peripheral surface forming portion 85 is the sea outer peripheral surface forming portion. It is formed so as to be curved along the extending direction of 85.
  • the bristle material 91 for brushes shown in FIG. 4 (G) it is formed on the sea-island composite fiber 94 having the sea part 92 and the island part 93 having a flat shape, and an outer peripheral surface forming part 95 having only a sea part and having a predetermined thickness or more.
  • the bending direction of each flat island portion 93 is opposite to the bending direction shown in FIG. ing.
  • the flat island portion 103 is thinner (smaller in the shorter diameter) and curved and extends in the radial direction of the sea-island composite fiber 104. Is formed.
  • an outer circumferential surface having a predetermined thickness or more consisting of only the sea part is formed on the sea-island composite fiber 114 having the sea part 112 and the island part 113 having a flat shape.
  • the island portion 113 having a flat shape is thicker (having a larger minor axis) and the number of island portions 113 having a flat shape is two. Has been.
  • an outer peripheral surface forming portion 125 having only a sea portion and having a predetermined thickness or more is formed on the sea-island composite fiber 124 having the sea portion 122 and a flat island portion 123.
  • the flat island portion 123 is formed to be thicker and longer, and both end portions of the island portion 123 are in contact with the outer peripheral surface forming portion 125. Extends to position.
  • an outer peripheral surface having a predetermined thickness or more formed only from the sea part is formed in the sea-island composite fiber 134 having the sea part 132 and the island part 133 having a flat shape.
  • the island part 133 has a flat shape, and the island part 133 in a flat shape is arranged in a quadrilateral form so that the island part 133 has a flat shape.
  • the total number is eight.
  • FIG. 5 illustrates various cross-sectional shapes of the sea-island composite fiber itself.
  • the outer peripheral surface forming part 145 having a predetermined thickness or more which is formed only by the sea part, is formed on the sea-island composite fiber 144 having the sea part 142 and the island part 143 having a flat shape.
  • the cross-sectional shape (outer cross-sectional shape) of the sea-island composite fiber 144 is formed in a triangular shape, and the region where the flat island portions 143 are arranged in parallel to each other is also formed in a triangular region.
  • the outer peripheral surface forming portion 155 having only a sea portion and having a predetermined thickness or more is formed on the sea-island composite fiber 154 having the sea portion 152 and the island portion 153 having a flat shape.
  • the cross-sectional shape (outer cross-sectional shape) of the sea-island composite fiber 154 is formed in a quadrangular shape, and the disposition region of the flat island portions 153 disposed in parallel to each other is also formed in a quadrangular region.
  • 5C is formed on the sea-island composite fiber 164 having the sea part 162 and the flat-shaped island part 163, and the outer peripheral surface forming part 165 having only a sea part and having a predetermined thickness or more.
  • the cross-sectional shape (outer cross-sectional shape) of the sea-island composite fiber 164 is formed in a trilobal shape, and the flat region of the island portions 163 arranged in parallel to each other is a circular region. Is formed.
  • the outer peripheral surface forming portion 175 having a sea thickness 172 and a flat island portion 173 is formed on the sea-island composite fiber 174 and has a predetermined thickness or more consisting only of the sea portion.
  • the cross-sectional shape (outer cross-sectional shape) of the sea-island composite fiber 174 is formed in a pentalobal shape, and the flat region of the island portion 173 arranged in parallel to each other is a circular region. Is formed. Thus, 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 11 and Comparative Example 1 [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 part, the resin type of the island part, the area ratio between the sea part and the island part, and the number of island parts are as shown in Table 2, and the island part is formed in a flat shape so that it is unevenly distributed in the part near the center part in the sea part.
  • the sea-island type composite fiber designed in this way 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 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 any brush, and is particularly suitable for a toothbrush, a tongue brush, a cleaning brush, and the like.
PCT/JP2016/088360 2015-12-25 2016-12-22 ブラシ用毛材及びそれを用いたブラシ WO2017111011A1 (ja)

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JPH09322821A (ja) * 1996-06-05 1997-12-16 Sunstar Inc 歯ブラシ
JP2006230543A (ja) * 2005-02-23 2006-09-07 Toray Monofilament Co Ltd ブラシ用毛材およびブラシ

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JP2623858B2 (ja) 1989-09-12 1997-06-25 東レ株式会社 ブラシ用繊維およびブラシ
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JP4816037B2 (ja) * 2005-12-02 2011-11-16 サンスター株式会社 歯ブラシ
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JP2010194150A (ja) * 2009-02-26 2010-09-09 Toray Monofilament Co Ltd 歯ブラシ用毛材および歯ブラシ
JP5401162B2 (ja) 2009-04-27 2014-01-29 ライオン株式会社 歯ブラシ用毛及び歯ブラシ
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CN113403703A (zh) * 2021-05-12 2021-09-17 江苏嘉通能源有限公司 一种四边形高中空度聚酯短纤维的制备方法

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