JP2018023476A - Bristle material for brush and brush using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bristle material for brush that acquires cleaning effect of a bristle tip by reducing an amount of a bristle tip part and has excellent visibility without any chemical treatment such as coloring and chemical agent treatment, and to provide a brush using the same.SOLUTION: In a bristle material for brush, a diameter of part of 0.5 mm from a tip of one end or both ends in a longitudinal direction of composite fiber having a structure of a transverse section formed by a resin having an inner layer and an outer layer of which hues are different from each other is equal to or lower than 90% of a diameter of transverse section of a bristle material central part. The bristle material for brush has a tip part and a lateral face part of which hues are different from each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a brush bristle material suitable for various brushes including a toothbrush and a brush using the same.

  Conventionally, a technique using a monofilament of synthetic fiber as a bristle material for a brush is widely known. In a brush using such a bristle material for a brush, for example, a toothbrush, it is desirable that the cleaning effect by the bristles is excellent, and further that the bristles are highly visible.

  However, a toothbrush bristle material formed from a single material monofilament from the root to the bristle tip may sometimes have difficulty meeting this requirement. That is, the brush bristle material formed from a single material monofilament from the root to the hair tip may have a limit in achieving both a cleaning effect and visibility, and it is particularly difficult to obtain the visibility of the hair tip. .

  There are almost the same problems in cleaning and cleaning brushes other than those for toothbrushes.

  Therefore, in order to improve the visibility in particular, Patent Document 1 discloses that the tip of the bristle material is dyed in the bristle material for the toothbrush.

  However, in the toothbrush bristle material disclosed in Patent Document 1, the tip of the chemically treated bristle material is further dyed, and the tip of the hair is tapered by chemical treatment to improve the cleaning effect. In addition, the visibility is improved by further dyeing, but in general, it is difficult in terms of production technology to chemically process the brush bristle material and dye the tip, and the productivity is low. It will be a thing. In addition, there is no dye that has acquired FDA, which is generally a safety standard for toothbrush applications, and it must be said that there is a problem with safety.

JP 2010-126819 A

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a brush bristle material excellent in scraping ability and visibility, and a brush using the same, without performing chemical processing and dyeing.

  In order to solve the above problems, a bristle material for a brush according to the present invention has one end in the longitudinal direction of a composite fiber having a cross-sectional structure in which an inner layer and an outer layer are formed of resins having different hues, or tips at both ends. To 0.5 mm in diameter is 90% or less of the diameter of the cross-section of the bristle central portion, and the tip portion and the side portion have different hues. Here, the difference in hue in the present invention means that the hue of ΔE = 20 or more in CIELAB is different.

  With this configuration, the inner layer having a different hue is exposed at the tip of the brush hair material. That is, in the bristle material for brushes according to the present invention, a hue different from the side surface in the longitudinal direction of the conjugate fiber can be expressed at the tip portion of the conjugate fiber constituting the bristle material. The tip part exhibits excellent cleaning properties.

  In the bristle material for brushes according to the present invention, the diameter of the 0.5 mm portion from the tip is preferably 90% or less, more preferably 80% or less of the diameter of the cross-section of the bristle center portion, More preferably, it is 50% or less. About the diameter of the cross section of this bristle material central part, what is necessary is just to be designed according to the use of the bristle material for brushes. By making it below a specific thickness, for example, in a toothbrush, penetration between teeth can be improved. In addition to exhibiting excellent cleanability, visibility can be improved because a two-layer hue difference appears at the tip portion.

  Further, the position of the portion that becomes the boundary of the hue between the tip portion and the side portion is preferably in the range of 0.3 to 10 mm from the tip of the composite fiber, and more preferably in the range of 2 mm to 10 mm. More preferably, it is in the range of 5 mm to 10 mm. The position of the portion that becomes the hue boundary between the tip portion and the side surface portion corresponds to the exposed portion of the hue portion of the tip portion, and is a part that improves visibility. It is preferable because excellent visibility can be exhibited.

  In the bristle material for brushes according to the present invention, the diameter of the composite fiber is preferably in the range of 50 to 1,000 μm, and more preferably in the range of 80 to 500 μm. When the diameter of the composite fiber is less than 50 μm, the waist of the composite fiber itself becomes too weak when used for a brush, and the cleaning effect may be lowered depending on the application. If the diameter of the composite fiber exceeds 1,000 μm, the composite fiber itself becomes too stiff when used in a brush, and depending on the exposed state of the tip part, the composite fiber at the root part of the tip part is covered. The object to be cleaned may be easily damaged by being strongly pressed against the object to be cleaned.

  In the bristle material for brushes according to the present invention, the thickness of the outer layer in the cross section of the composite fiber is preferably in the range of 10% to 70% of the diameter of the composite fiber. Since this thickness affects the above-described visibility, it may be appropriately set from the above range according to the application.

  Moreover, in the bristle material for brushes according to the present invention, the shape of the inner layer of the composite fiber may be circular, or may be an irregular cross-sectional shape such as a triangle, a square, or a star shape. A plurality of inner layers may exist. A part of the inner layer may be exposed on the surface of the composite fiber. Here, a part of the inner layer means that the ratio of the contour length exposed on the surface to the contour length of the inner layer in the cross section of the composite fiber is 40% or less, and the ratio is 20% or less. Is preferable, and 5% or less is more preferable. By exposing the inner layer, resins having different hues extend in the fiber axis direction to form stripes, thereby improving the design. The presence pattern such as the shape and number of the inner layers and the exposure fog on the surface may be appropriately set from the above range depending on the application in consideration of visibility and design.

Moreover, in the bristle material for brushes according to the present invention, it is preferable from the viewpoint of visibility that the hue difference between the inner layer and the outer layer is due to a combination in which the inner layer is a dark color and the outer layer is a light color. Here, the dark color means a dark color side of ΔE = 20 or more in CIELAB, and the light color means a light color side of ΔE = 20 or more in CIELAB. (When the gradation between white and black is expressed in 100 steps on the basis of the reflection of white light, it means that it has a color intensity that gives reflection of white light hitting 50 steps on the black side, Means a color intensity that gives reflection of white light corresponding to 50 levels on the white side, and from the viewpoint of visibility, the density of dark and light colors has a difference of 20 levels or more in the gradation. It is preferable to have.)
Moreover, in the bristle material for brushes according to the present invention, the cross-sectional shape of the entire composite fiber may be either a circular shape or a non-circular cross-sectional shape. What is necessary is just to determine suitably according to a use, a use form, use conditions, etc.

  In the bristle material for a brush according to the present invention, it is preferable that the inner layer and the outer layer constituting the composite fiber are provided concentrically. As long as it is concentric, any of a concentric circular shape, a polygon other than a circle, or an irregular cross-sectional shape can be employed. This is because by providing the resin layer concentrically, it is possible to more easily design the visibility and form the tip shape in the present invention.

  Further, in the brush hair material according to the present invention, it is easy to achieve the desired visibility and tip shape only by mechanical friction treatment for the tip cleaning property and the visibility improvement by dyeing that have been achieved by the drug dissolution treatment. Can be formed.

  The present invention also provides a brush in which the brush bristle material according to the present invention as described above is used at least in part. In particular, the brush according to the present invention has an excellent visibility improvement due to the hue difference formed at the front end portion of the bristle material as described above and an improved penetration property between teeth due to a narrow tip end. It is suitable as a tongue brush, makeup brush, application brush, and the like.

  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 the bristle length (length from the brush root to the bristles), more preferably , In the range of 5 to 35 mm.

  According to the present invention, there is provided a bristle material for a brush that provides a cleaning effect by the hair tip by reducing the tip of the hair tip without chemical treatment such as dyeing or chemical treatment, and also exhibits excellent visibility. can do.

  Further, according to the present invention, various brushes using at least a part of the brush bristle material as described above can be provided, and in particular, a brush suitable as a toothbrush, tongue brush, makeup brush, application brush or the like is provided. Can do.

1 shows a bristle material for a brush according to an embodiment of the present invention, FIG. 1 (A) is a schematic longitudinal sectional view of one end of the bristle material, and 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 longitudinal cross-sectional view of the one end part of the bristle material for brushes concerning another embodiment of this invention. It is a schematic cross-sectional view which shows the various form examples of the bristle material for brushes concerning this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a brush bristle material 1 according to an embodiment (Embodiment 1) of the present invention, and FIG. 1 (A) shows one end of the brush hair material 1. As shown in FIG. 1B, the brush bristle material 1 is a composite fiber 3 composed of an inner layer 2a and an outer layer 2b formed of two or more types of resins having different hues (two types of resins in the illustrated example). In particular, in the first embodiment, the inner layer 2a and the outer layer 2b are concentrically arranged with the same thickness in the longitudinal direction of the composite fiber. At one end or both ends in the longitudinal direction of the composite fiber 3 (FIG. 1A shows only one end of the bristle material 1), a hue difference portion 4 where the inner layer 2a is exposed is formed. Yes. In the first embodiment, the hue difference portion 4 is formed at one end portion or both end portions in the longitudinal direction of the composite fiber 3, and the outer layer 2 b extending over the entire circumference in the direction along the outer peripheral surface of the composite fiber 3 is mechanical. The inner layer 2a is left appropriately after being worn by friction treatment.

  As the mechanical friction treatment, for example, a trimming treatment can be applied, and as a resin layer formed of two or more kinds of resins having different hues, for example, the inner layer 2a and the outer layer 2b are made of nylon (resin having high wear durability) Ny) (registered trademark), the inner layer 2a and the outer layer 2b are made of polybutylene terephthalate (PBT) as a polyester resin as a resin having low wear durability, or even a composite of them is worn. As a result, an end portion of the brush bristle material 1 having the hue difference portion 4 as shown in FIG.

  In this bristle material 1 for brushes, mechanical friction treatment is used at one end or both ends in the longitudinal direction of the composite fiber 3 having a cross-sectional structure composed of resin layers formed of two or more kinds of resins having different hues. And the inner layer 2a part is exposed and the hue difference part 4 is formed. The hue difference portion 4 is formed in an annular shape, the hue difference portion 4 is thinner than the brush hair material, improves the penetration between teeth when scraping dirt, and exhibits a high cleaning effect. It will exhibit cleanliness.

  The brush bristle material 1 configured as described above is used at least in part for producing 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.

  FIG. 2 (A) shows a toothbrush 13 in which the brush bristle material 11 is planted on the head part of the toothbrush constituent 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 above-described hue difference portions 4 are formed at both ends of the bristle material 1 for brushes, and a flat wire toothbrush. When used for the above, the hue difference portion 4 is formed at one end of the brush bristle material 1.

  FIG. 3 shows one end of a brush bristle material 21 according to another embodiment (Embodiment 2) of the present invention. In this embodiment, the bristle material 21 for brushes is a cross section composed of an inner layer 22a and an outer layer 22b formed of two or more types of resins having different hues (two types of resins in the illustrated example) arranged concentrically. It is a composite fiber 23 having a structure, and at one end or both ends in the longitudinal direction of the composite fiber 23 (FIG. 3 shows only one end of the bristle material 21), a hue difference portion where the inner layer 22a is exposed. 4 is formed. The outer layer 2b extending over the entire circumference in the direction along the outer peripheral surface of the composite fiber 3 is worn by the mechanical friction treatment, and the inner layer 22a is appropriately left. In the present embodiment, the inner layer 22a is made of, for example, a resin with low wear durability (for example, polybutylene terephthalate (PBT)), and the outer layer 22b is, for example, a resin with high wear durability (for example, nylon (Ny)). The inner layer 22a that is appropriately left without being worn in the mechanical friction treatment forms the hue difference portion 24. Due to the different wear durability, the tip has a hook-like or telescope-like structure, and the entire tip of the bristle 21 is formed in a tapered shape.

  Also in the bristle material 21 for brushes having such a tip portion formed in a tapered shape, as in the first embodiment, excellent visibility by the hue difference portion 4 and excellent penetration between teeth due to the tapered shape are provided. It is expressed, and it is possible to exhibit an excellent cleaning effect even for finer parts (for example, periodontal pockets) by forming the tip portion in a tapered shape as compared with the first embodiment. .

  About the said Embodiment 1 and Embodiment 2, the typical characteristic at the time of applying to a toothbrush was put together in Table 1. FIG. In the first embodiment, the composite fiber 3 is formed of a resin layer made of nylon (Ny) (registered trademark) or a resin layer of polybutylene terephthalate (PBT). In the second embodiment, the inner layer 2a is made of polybutylene terephthalate (PBT). The outer layer 2b is made of nylon (Ny) resin, and the hue difference portion is formed by trimming and sandpaper treatment, respectively. The characteristics of the bristle material for brushes in Table 1 are shown as contrast characteristics with the bristle material for brushes that are usually formed of a single nylon material (registered trademark) monofilament. 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 bristle material for brushes according to the present invention can take various forms in addition to the first and second embodiments. FIG. 4 illustrates various forms of the cross section of the composite fiber.

  Moreover, in the bristle material 31 for brushes shown to FIG. 4 (A), while being formed in the composite fiber 33 which consists of the inner layer 32a and the outer-outer layer 32b arrange | positioned concentrically, the outline in the cross section of the inner layer 32a is a triangle. The hue difference portion 34 is formed at one end portion or both end portions. In the bristle material 41 for a brush shown in FIG. 4B, it is formed in a composite fiber 43 composed of an inner layer 42a and an outer layer 42b concentrically, and the contour in the cross section of the inner layer 42a is formed in a wave shape. The hue difference portion 44 is formed at one end portion or both end portions. In the brush bristle material 51 shown in FIG. 4C, a plurality of arranged composite fibers 53 including an inner layer 52a and an outer layer 52b are formed, and the contour and arrangement in the cross section of the inner layer 52a are illustrated in a petal shape. The hue difference portion 54 is formed at one end portion or both end portions. In the brush bristle material 61 shown in FIG. 4 (D), it is formed in a composite fiber 63 composed of an inner layer 62a and an outer layer 62b concentrically, and a cross section of the composite fiber 63, the inner layer 62a, and the outer layer 62b. Are formed in a hexagonal shape, and a hue difference portion 64 is formed at one end or both ends.

Further, the brush hair material according to the present invention does not need to use a dye to obtain a hue difference,
Thus, the composite fiber having a cross-sectional structure composed of a plurality of resin layers in the present invention can take various cross-sectional forms, and can be optimally designed according to the application and intended use.

  The present invention can be applied to any brush, and is particularly suitable for a toothbrush, a tongue brush, a makeup brush, an application brush, and the like.

1, 21 Brush hair material 2a, 22a, Inner layer 2b, 22b Outer layer 3, 23 Composite fiber 4, 24 Hue difference part 11 Brush hair material 12 Toothbrush component 12a Head part surface side member 12b Head part back surface side member 13 Toothbrush 14 Flocking hole 15 Flat wire 16 Through hole 17 Fried ball 31, 41, 51, 61 Brush hair material 32a, 42a, 52a, 62a, inner layer 32b, 42b, 52b, 62b, outer layer 33, 43, 53, 63 Composite fiber 34, 44, 54, 64 Hue difference part

Claims (5)

  The diameter of the cross section of the hair material center is 0.5 mm from the end of one end or both ends of the longitudinal direction of the composite fiber having a cross section structure in which the inner layer and the outer layer are formed of resins having different hues. The brush hair material has a hue of 90% or less and a different hue at the tip and side portions.   The bristle material for brushes according to claim 1, wherein a position of a portion that becomes a hue boundary between the tip portion and the side portion is in a range of 0.3 to 10 mm from the tip of the composite fiber.   The bristle material for brushes according to claim 1 or 2 whose thickness of the outer layer in the cross section of said conjugate fiber is 10%-70% of the diameter of said conjugate fiber.   The bristle material for brushes according to any one of claims 1 to 3, wherein the resin of the inner layer is a dark color and the resin of the outer layer is a light color. The brush in which the bristle material for brushes in any one of Claims 1-4 is used for at least one part.

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