JP2019528923A - Applicator with microstructured surface - Google Patents

Abstract

In an applicator comprising a lacy bristle carrier and a bristle (1) molded thereon, the surface of the bristle (1) is at least partially microstructured, which is In the region of the finished surface, a plurality of grains (2, 3) protrude randomly from the brush bristle core (4), and these grains are less than 40%, better less than 35% of the outer surface of these grains The applicator is connected to the brush bristle core (4) only along the mean diameter (φM1, φM2) of the grains is 125 μm or less, better 90 μm or less.

Description

  The present invention preferably relates to an applicator with brush bristles having a microstructured surface, and the present invention also provides an option for applicators without brush bristles.

  In the field of applicators rimmed with brush bristles, basically a wire core applicator (in this case, the bristles in the form of short cut filaments are sandwiched and held between two wire cores which are laid together) And an applicator that has been injection molded (in this case, the core of the applicator is manufactured with the bristles molded into the core during the injection molding). In this case, for each bristle, there is an individual brush bristle mold hole into which a plastic paste is placed, whereby the bristle is molded.

  In particular, in the brush hair to be injection-molded, since the surface of the brush hair is very smooth, there is a serious problem that the storage capacity of the cosmetic paste attached to the brush hair is limited. Therefore, conventionally, attempts have been made to improve the applicator storage capacity by variously configuring the gaps between normal bristles. A reservoir was placed between the brush bristles so that more paste could be stored therein.

  Another suggestion is to use a flocked part instead of the bristle, which is very absorbent and therefore can store a significant amount of paste. However, this type of applicator not only has to transfer a larger amount of cosmetic paste, but it is rather a drawback when combing or curling is desired, like a mascara applicator. Furthermore, the adhesive used in the case of a flocked part has drawbacks. This adhesive has the disadvantage that small floc pieces adhere to it, which makes it difficult to obtain surface properties that are precisely defined and that are less dependent on chance. Furthermore, the adhesive has, in most cases, no effect on the contour already provided in the material.

  Based on this, according to PCT / EP2015 / 067694, solid particles are embedded in the plastic matrix in the course of injection molding, and these partially extend outwardly over the plastic surface of the injected bristles. Brush hair has already been proposed. This technology in itself works very successfully. Depending on the application, this technique has its drawbacks, which are certain disadvantages in that the solid particles protrude and the protruding geometry is almost unlikely to change or cannot change at all. Occurs.

  On the other hand, the object of the present invention is to achieve further improvements and adjustability of the bristle paste storage capacity.

  This problem can be solved by the invention of an applicator provided with a bristle carrier and the bristle formed thereon. The point that the brush hair stands out is that its surface is finely structured. This microstructure can only be partly attached, for example in the form of a local annulus surrounding the bristles in the circumferential direction or locally extending along it in the direction of the longitudinal axis of the bristles. It can be attached in the shape of a streak. Preferably, the main part of the surface of the bristles is finely structured, and ideally the whole bristles are finely structured.

  This fine structuring is performed by a plurality of grains protruding randomly from the bristle core in the finely structured surface region. In the sense of the present invention, messy protruding is understood to be an accidental arrangement as opposed to a directional arrangement with a column or matrix field or with a repeating pattern.

  The above-mentioned grains stand out because they are connected to the bristle core only along less than 40%, or better than 35% of the original free open outer surface of these grains. It is. The unconnected parts of the surface are free and open and project towards the outside and are therefore available for wetting with cosmetic paste.

  The average diameter of the individual grains is 125 μm or less, preferably 90 μm or less. In the present invention, the average diameter of a grain is the imaginary smallest sphere in which the relevant grain (assuming that it has been removed from the brush bristle core) can still be inscribed in the present invention. Diameter.

  Figuratively speaking, the teaching of the present invention is that the surface of the bristle is equipped with a targeted number of "Streuzels", which gives a wide range of controllable roughness to this surface. . This roughness can be utilized to target, improve the wettability of the brush hair and / or improve the adhesion of the cosmetic paste to the brush hair. In this way, a goal can be set and the storage power of the brush bristle surface can be tailored to the cosmetic to be transferred by the bristle and its rheological properties, respectively.

  This surface structure is not controllable in the case of injection molding. Therefore, this type of microstructure is not feasible in injection molding. However, microstructuring can be made well by three-dimensional plastic printing or laser sintering of plastic known in the field of “rapid prototyping (high-speed prototyping)”, and generally, molding is performed. It can be made by a layer forming method. In this case, the melting time only has to be controlled well, so that a flat surface over a wide area is not melted. Alternatively, the laser beam is deflected and / or focused so that the grains used as raw material are only partially and locally coupled with the bristle core by corresponding local fusion. Furthermore, control can be achieved via the average particle size of the granules employed.

  Further problems of the present invention

  Another object of the present invention is to achieve further improvements and configurability of the paste storage capacity of an applicator without brush bristles.

In order to solve this further problem, an applicator with a specially structured cosmetic application surface is shown. Here, the cosmetic application surface is in any case a sophisticated applicator body (with no handle and closure lid) itself that fits in a virtual cylinder of 2 cm radius and 8 cm length. Understood to be a surface.

  This cosmetic application surface consists of a plurality of individual surfaces formed from the brush bristle jacket, with individual surfaces in the region of the brush bristle region between the bristles. Preferably, however, this is a cosmetic application surface of an applicator constructed without protruding brush bristles, fingers or pins.

  The point where the cosmetic application surface according to the present invention stands out is that the surface is finely structured. This microstructure can only be partly attached, for example a local annulus surrounding the applicator in the circumferential direction, or a local pattern, preferably arranged on the entire cosmetic application surface as an aligned pattern. The geometric shape of the island. Preferably most part of the cosmetic application surface, ideally the entire cosmetic application surface, is microstructured.

  In this case as well, the fine structuring is effected by a plurality of grains randomly protruding from the bristle core in the region of the finely structured surface. Randomly protruding is understood in the sense of the present invention to be an accidental arrangement as opposed to a directional arrangement with a column or matrix field-like or repeating pattern.

  The distinguishing point of the above-mentioned grains is that they are connected to the brush bristle core in less than 40%, or better still less than 35% of the original free and open outer surface. The unconnected parts of the surface are free and open and project outwards and are therefore available for moistening with a cosmetic paste.

  The average diameter of the individual grains is 125 μm or less, and preferably 90 μm or less. In the present invention, the average diameter of a grain is the imaginary smallest sphere in which the relevant grain (assuming that it has been removed from the brush bristle core) can still be inscribed in the present invention. Diameter.

  Figuratively speaking, the teachings of the present invention are intended to equip a cosmetic application surface with a targeted number of "Streuzels", which give a wide range of controllable roughness to this surface. This roughness can be utilized to target and improve the wettability of the cosmetic application surface and / or the adhesion of the cosmetic paste to the cosmetic application surface. In this way, a goal can be set to tailor the storage capacity of the cosmetic application surface to the cosmetic to be transferred by the cosmetic application surface and its rheological properties, respectively.

  This surface structure is of course no longer controllable during the injection molding, and therefore the above mentioned manufacturing indications do not apply here.

Possibility of suitable configuration In both cases mentioned above, the set of grains used for the surface microstructure comprises the first grains with an average diameter of 30 μm or better, better 40 μm or better, or completely It turned out to be a good purpose when made of these grains. These types of grains are small but not too small and in most cases can make particularly good contact between normal cosmetic pastes and finely structured brush hairs using these grains .

  In many cases, a plurality of second grains are distributed between or in contact with the first grains, which protrude from the bristle core as described in the present invention, and / or Conveniently projecting from the first grains, their mean diameter is advantageously less than 30 μm, or better still less than 25 μm. This kind of scattering of smaller second particles can further enlarge the wettable surface, for example in the case of critical cosmetic substances, which can contribute to delaying the dripping.

As already mentioned at the outset, the bristles need not have the microstructure according to the invention on their entire surface. It may be sufficient if the brush bristle jacket has an area of 1 mm ² in any case, on which at least 5 and better still at least 8 grains protrude as described above.

  For large area microstructures, ideally this dimension is maintained over all or at least the majority of the microstructured area.

  Particularly advantageous is that the first grain has a point where it is connected to the bristle core at or along its circumference and a first grain that projects freely outward. It has been found that there is an undercut between the maximum perimeter, at least locally, preferably at least up to 70% of the perimeter. In this way, the corresponding grains are shaped-fastened and dive like wrinkles in the layer of cosmetic paste loaded with brush hairs, and thereby help in a particularly good holding of the cosmetic paste.

The retention function that the microstructured surface exerts on the cosmetic paste can be further improved, but this may be due to the presence of multiple grains having multiple undercuts of the type described above on an area of 1 mm ^2. This is done by being positioned directly adjacent. In doing so, these grains should not touch each other and, when viewed substantially radially, each of these grains has a minimum spacing relative to each other above the area where it is connected to the bristle core, and From the position to the region where these grains are connected to the core, this distance increases again.

  Particularly advantageous here is that the surface microstructure is such that at least 25%, better at least 30% of the free open surface of the bristles is in the area of the radial undercut. It is a case where it is controlled by. The concept of “free and open surface” defines that the surface is freely accessible from the outside in any way. The above-mentioned path is not a straight path, but a path that always extends in the air space rather than crossing another grain. An undercut is an empty space from which a straight path is not drawn in a purely radial direction (in a direction perpendicular to the brush bristle longitudinal axis).

  It is particularly advantageous not only to equip the bristle with the above-mentioned microstructure, but where appropriate, the bristle carrier can be moved away from its bristle area (this protrudes from the surrounding bristle carrier). Can also be equipped with a microstructured surface of the kind described above. This also makes it possible to set the wettability or paste storage capacity of the bristle carrier.

  Of particular advantage, the applicator core or the bristle carrier is a plastic or metal part that is injected, extruded or manufactured by injection molding, with the bristle applied as a layer thereon It turned out to be an applicator that stands out. A particularly cost-effective manufacturing can be achieved by: the plastic molded part or the metal part already being fitted with a set of bristles (eg by injected or inserted filaments) Only conventional brush hairs or special brush hairs can be attached using a layer forming method for forming and / or adopting a layer forming method for forming existing brush hairs according to the present invention. Attachment can be achieved simply by coating the microstructured surface.

  This is especially true when the applicator that is not rimmed with bristles, eg for use as a lip applicator, is provided with a microstructured surface according to the invention.

  Of particular interest here is the use of an applicator material molded by injection molding or other methods to make the finished applicator, which is then applied to the layer to be molded. This is a case where the forming method is used to apply the surface structured in accordance with the present invention. In a preferred case, as long as the surface microstructured according to the invention should only be applied locally, the applicator material is preferably provided with a recess, which is the layer to be molded. Fill by forming method. This makes it possible to achieve particularly good tethering to the microstructured surface according to the invention and to selectively demarcate between the microstructured region and the region with conventional surface properties. Is achievable.

  Protection is also claimed for the production of such an applicator and / or for the production of an applicator with a surface structured according to the invention.

  Also for applicators in which part of the bristles are injection-molded bristles, between which at a later point additional brush bristles are attached by a layer-forming method of molding, and We also claim protection for the manufacturing method of this type of applicator.

  In accordance with this, an applicator manufacturing method of the type already described, wherein the applicator core or the bristle carrier is produced as the following points, that is, as injection molded parts, Prior to applying the bristle as a layer on top, a treatment, preferably a corona treatment, is applied, which increases the surface tension of the applicator core or the bristle carrier, and preferably polar components of said surface tension. Claim protection also in ways that stand out to be enhanced.

  In this case, it is particularly advantageous if the surface tension of the material of the applicator core or the bristle carrier is set higher than the surface tension of the material to be applied.

  The protection associated with the features claimed above, but without any reliance on the features claimed above alone, requires protection beyond a surface roughness of at least ± 2/1000 mm. In the area where the thickness is reduced, the applicator has a support portion ratio of the edge layer measured to a depth of 2/10 mm, more preferably to a depth of 4/10 mm, of 50% or less. This measurement may be on the outermost surface of the edge layer, in some cases. This is done by placing a straight line from the surface tip to the immediately adjacent surface tip. From there, it is measured inwardly in the radial direction by the amount described above, ie 2/10 mm or preferably 4/10 mm. The ratio of “air” measured inside the streak is at least equal to or more than the ratio of plastic measured inside the streak.

  In general, if the applicator has a surface structure according to the present invention, it is preferred that the applicator is preferably implemented with one material, i.e. consists of only a single plastic material. is there.

  Further actions, advantages and configurability will become apparent on the basis of the subsequent embodiments describing the drawings.

FIG. 2 shows an embodiment of a brush bristle whose tip region is microstructured according to the present invention, with a substantial portion of this tip being removed, which sees a brush bristle core with diagonal lines And is specifically shown. FIG. 2 is an enlarged detail of the left side of the microstructured brush bristle tip of FIG. 1. It is the figure which showed the essential size and the lateral deflection property of the bristle of this invention. It is a figure which shows the example which applied this invention to the lip applicator by which the whole is not rimmed by the bristle. An example of the application of the present invention to another lip applicator that is not entirely brushed but instead has an additional macroscopic structure is shown. It is a mere partial sectional view omitted.

First Embodiment FIG. 1 shows the upper part of a plastic bristle, which may form the rim of a bristle applicator according to the invention.

  The length LAE of the brush hair according to the present invention is usually 3 mm to 10 mm. The maximum bristle diameter DB of the bristle according to the present invention is usually 0.01 mm to 0.05 mm.

  The bristles according to the invention are preferably flexible, i.e. they can deflect laterally. Typically, the amount of flexibility is such that the tip of the bristle has a reversible elasticity due to the force generated during application, and the maximum diameter of the bristle (from the chamfer where the bristle can migrate into the bristle carrier). The amount of BT that can be deflected to the side by at least 4 times, more preferably at least 6 times the value measured above, is as shown in FIG.

  Particularly advantageous is when the bristles taper from their roots towards their tips, preferably with an average cone angle AP of 0.2 ° to 10 °.

  An applicator according to the present invention typically has 75 to 750 brush bristles of the type just described.

  It should be noted here that even if the brush bristles move integrally into the bristles carrier, the plastic of the bristles does not have to be the same as the plastic of the bristles carrier. Further advantageous may be that the bristles can be made of different plastics along different areas. Thus, for example, it has proved advantageous to produce the bristle in particular at its root region from elastic plastic so that the bristle can reciprocate, thereby making certain joints at this point. .

  In the bristle shown in FIG. 1, the fine structure according to the present invention is provided only in the bristle tip region. In addition, it is also possible to provide this type of microstructure in the region of further isolated brush hairs. For example, it is also possible to equip in this way one or more spaced annular parts surrounding the bristles already mentioned above. In some other applications, it is particularly advantageous to provide the entire bristles with the microstructure according to the invention.

Second Embodiment The second embodiment of the present invention is specifically shown in the upper half of FIG. 4, and the third embodiment is specifically shown in the lower half of FIG. This deals with a lip applicator. The material of this lip applicator is preferably manufactured as an injection molded part. Subsequently, the lip applicator is equipped with a surface that is partially microstructured according to the invention in the manner described above.

  In the case of the second embodiment, an end face 6 of the lip applicator is provided according to the invention, which is adapted to receive a quantity of cosmetic product to be applied from the reservoir and to apply it on the lips.

  As can be seen, in this case, the edge of the end face 6 is provided with a first region 7 which is finely structured according to the present invention. Preferably, this region 7 is microstructured so that the cosmetic to be applied adheres particularly well to this region. In this way, smudge spots can be avoided or delayed. In the absence of this area, first a certain amount of adhesive cosmetic adhering to the end face 6 and received will slide down and eventually dripping from the end face through the edges, which can cause this smear.

  In addition, the retention can be further improved if a second (generally 5-25) microstructured region 8 is present. These further microstructured regions 8 are preferably formed as separate islands, each of which is ideally individually a surface extension of a circular, oval, elliptical or plum shape. Have

  Preferably, in this embodiment, the microstructured surface only occupies a smaller portion of the surface intended for application (generally this is the end face).

  The lower half of FIG. 4 replicates the third embodiment.

  In the case of the third embodiment, the end face 6 of the lip applicator which is adapted to receive a certain amount of cosmetic product to be applied from the reservoir and to be applied on the lips is likewise equipped according to the invention. . For this purpose, a microstructured region 9 is provided, which in this case preferably has an annular portion which is arranged concentrically or in an equidistant shape. Between the microstructured regions, a conventional region 10 can also be provided which likewise exists in a ring. This arrangement also has a very good effect on paste storage and paste release behavior. When the surface structure according to the invention is designed accordingly, the microstructured region 9 can draw a larger amount of cosmetic product from the reservoir and transport it to the main part to be processed. Thereafter, at the time of application, a portion of the paste stored by the microstructured area is first extruded into a conventional area and then expelled from this conventional area to the main part to be processed, particularly quickly. The

  It should also be noted here that the microstructured surface according to the invention and the macroscopic surface structure are spatially overlapping and preferably can also reinforce their action. This is evident in the fourth embodiment shown in FIG. In this case, a macroscopically raised region 11 is implemented in the lip applicator. In any case, this is a structure that protrudes at least 0.8 mm (FIG. 5, dimension A) at least in one direction with respect to the periphery (FIG. 5, dimension W) that is at most 3 mm apart on both sides along the above-mentioned direction. It is.

  The raised area of FIG. 5 can be provided with a surface that is additionally microstructured according to the present invention, thereby significantly increasing the paste storage capacity of the valley 12.

  Alternatively, according to the rheology of the cosmetic paste to be applied, only the troughs 12 may be equipped with a microstructured surface according to the present invention, or the troughs 12 may be additionally equipped with a microstructured surface. Can be meaningful.

  Details of the fine structure employed in the embodiment

  The details of the microstructure according to the invention (for the example of bristles) can be fully recognized on the basis of FIG.

  As can be seen, the bristle has a bristle core 4. The brush bristle core 4 may have a uniform structure or a granular structure. Unless there is local trapped air or local gaps (unless shown in the drawing) unless the bristle reduces the bristle strength and elasticity to the extent that the bristle no longer exhibits the flexibility mentioned at the outset Moreover, it can be said that it is a uniform structure.

  Subsequent embodiments apply semantically as well for applicators without brush bristles. This brushless applicator can likewise have a corresponding applicator core with a uniform or granular texture. To say that the bristles are uniform tissue even in the presence of local trapped air or local gaps (not shown in the drawings) unless the bristles reduce the strength and elasticity of the bristles Can do.

About both embodiment examples, the following points correspond semantically similarly.
As can be seen, a large number of grains 2 and 3 protrude from the surface of the brush bristles 1 in the microstructured region. As can be appreciated on the basis of FIG. 2, these grains now have a free, open or outermost local boundary of the outer surface that now forms the bristles. The shortest virtual section that can theoretically separate each grain from the brush bristle core 4 is less than 40% of the free open outer surface of each grain in grains 2, 3 that are essential to the present invention. .

  The grains have a defined size. Similarly, how this size is determined can be sufficiently recognized based on FIG. A theoretical sphere is formed in which the particles to be measured are inscribed. The smallest possible sphere radius that the grain can still inscribe (optically measured) indicates the mean diameter φM of the grain. This average diameter φM is 125 μm or less for the grains according to the invention.

  Preferably, in this case, there is a difference between the larger first grain 2 and the smaller second grain 3, both of these types of grains being fully recognizable in FIG.

  The point where the larger grains 2 stand out is that the average diameter φM is at least 30 μm. On the contrary, the smaller grains 2 which are preferably additionally present stand out with an average diameter φM of less than 30 μm, preferably even less than 25 μm.

  It can be easily understood on the basis of FIG. 2 that the microstructure according to the invention forms a rough and rough surface with a number of undercuts, which can be filled with cosmetic paste. It is a dimension. In this way, a large number of protrusions and notches are produced, where the cosmetic paste can be retained. Therefore, even when the cosmetic paste is set to smoothly wet the smooth plastic surface without difficulty, the cosmetic paste can be satisfactorily filled into the surface.

  The retention effect can be further reinforced when the production method is set such that grains that are directly adjacent but not in contact with each other appear regularly.

  In a convenient case, these grains are again such that the spacing between the grains again increases from the point where the grains have the smallest spacing KA to each other to the region B where the grains are connected to the brush bristle core. Is connected to the bristle core.

  In this way, they create an opposing undercut that exhibits a particularly good holding effect.

  This type of positional relationship is illustrated in FIG. 2 slightly above the center of the figure and is labeled with a reference numeral.

  Whenever the applicator core or bristle carrier is produced as a prefabricated part, and in particular as an injection-molded part, on which a structured surface or bristles is applied as a layer In order to ensure good adhesion of the material to be done, it is meaningful to perform a treatment to prepare a structured surface on the surface of the material described above. This is particularly true when the above-described materials are made of polyethylene, polypropylene and polyester.

  In this case, suitable treatment methods are corona treatment and, in some cases, fluorination or flame heat treatment or plasma treatment. The purpose of these methods is to increase the polarity of the surface, which can clearly improve wettability and chemical affinity.

  Corona treatment is usually performed “in-line” at the end of the material manufacturing process. The material is, for example, a cylindrical bristle carrier that has not yet been brushed at the root, and is then exposed to a high voltage discharge. This discharge takes place between a grounded and polished steel or aluminum plate or roller and insulating electrodes spaced closely apart.

  Depending on the application field, it is also possible to employ insulating rollers for non-insulating electrodes.

  At this time, the bristle carrier rotates around the electrode. The electrodes are fed with a high frequency generator having an AC voltage of 10 to 20 kV and a frequency of 10 to 60 kHz.

DESCRIPTION OF SYMBOLS 1 Brush hair 2 1st particle | grain 3 2nd particle | grain 4 Brush hair core 5 Undercut 6 End surface (application surface) of a lip applicator
7 (first) region 8 equipped with a microstructured surface (second) region 9 equipped with a microstructured surface (further) region 10 equipped with a microstructured surface 10 conventional region 11 (macroscopically) raised area 12 valley R radial direction B area where the grain is connected to the brush bristle core 4 KA minimum interval L between two directly adjacent grains L brush hair longitudinal axis φM average diameter of the grain φMax Maximum perimeter LAE of brush grain DB Maximum brush bristle diameter BT Maximum amount of brush bristle BT The amount of brush bristle reversible AB The average cone angle / taper angle A of brush bristle Dimension of distance from region (valley) to bump

Claims (14)

In an applicator comprising a bristle carrier and the bristle (1) molded thereon,
The surface of the bristles (1) is at least partially microstructured;
This is because in the region of the microstructured surface, a plurality of grains (2, 3) project randomly from the brush bristle core (4), and the grains are less than 40% of the outer surface of the grains, and more Preferably, it is connected to the brush bristle core (4) along only less than 35%, and the average diameter (φM1, φM2) of the grains is 125 μm or less, and more preferably 90 μm or less. An applicator characterized by that. In an applicator with a cosmetic application surface,
The surface of the cosmetic application surface is at least partially microstructured;
This is because in the region of the microstructured surface, a plurality of grains (2, 3) project randomly from the cosmetic application surface, and the grains are less than 40% of the outer surface of the grains, better It is connected to the cosmetic application surface along only less than 35%, and the average diameter (φM1, φM2) of the grains is 125 μm or less, and more preferably 90 μm or less. ,applicator.   Said grains (2, 3) comprise the first grains (2) or consist entirely of the first grains (2) and the mean diameter (φM1) is at least 30 μm and better still at least 40 μm The applicator according to claim 1 or 2, wherein the applicator is provided.   2. The plurality of second grains (3) are randomly distributed between the first grains (2) or in contact with the first grains (2), and the second grains are the brushes according to claim 1. Projecting from the hair core (4) and / or from the first grain (2) in a corresponding manner, the mean diameter (φM2) of the second grain is less than 30 μm, better still less than 25 μm The applicator according to any one of claims 1 to 3, wherein the applicator is provided. The area of the brush coat is 1 mm ² anyway, on which at least 5 and better at least 8 first grains (2) project as described above. The applicator according to any one of claims 1 to 4.   Where the first grain (2) is connected to the bristle core (4) along its periphery, and the largest of the first grain (2) that is free to open and project outward 6. The undercut (5) according to claim 1, wherein an undercut (5) is present at least locally with respect to the circumference (φMax), preferably at least 70% of the circumference. applicator. On an area of 1 mm ^2, have a plurality of grain (2) is present which has an undercut (5), wherein the grains have positioned directly adjacent,
The grains (2) are not in contact with each other and, when viewed substantially in the radial direction (R), are at a minimum distance from each other above the region (B) connected to the brush bristle core. The applicator according to claim 6, characterized in that the distance increases again from this location to the region (B) connected to the brush bristle core (4). .   8. The method according to claim 1, wherein at least 30% of the free and open surface of the microstructured bristles is present in the region of a radial undercut (5). The applicator according to any one of claims. The bristle carrier has a free and open surface in a region free of bristles between surrounding bristles and is at least partially microstructured;
This is because in the region of the microstructured surface, a plurality of first grains protrude from the brush bristle core, the plurality of first grains being less than 40% of the outer surface, better 30 1 to 8 characterized in that it is connected with the brush bristle core along only less than%, and the average diameter of the grains is not more than 125 μm, more preferably not more than 90 μm. The applicator according to any one of the above.   The applicator core or brush bristle carrier is a plastic molded part or metal part without brush bristle or provided with a brush root, and comprises brush bristle applied as a layer thereon, The applicator according to any one of claims 1 to 9.   A part of the bristles are injection-molded bristles, and the bristles are additionally attached between the bristles at a later time using a layer forming method of forming. The applicator of claim 9.   The proportion of the support part of the edge layer of the applicator measured to a depth of 2/10 mm, more preferably to a depth of 4/10 mm, is 50% or less. Applicator according to item. The applicator manufacturing method according to claim 10, wherein an applicator core or a bristle carrier is produced as an injection molding part, and the applicator core or the bristle carrier is coated with a bristle on the applicator core or the bristle carrier as a layer. A treatment, preferably a corona treatment, wherein the treatment is set to increase the surface tension of the applicator core or the bristle carrier, and preferably to increase the polar component of the surface tension. And the method. The method according to claim 13, characterized in that the surface tension of the material of the applicator core or the bristle carrier is set greater than the surface tension of the material to be applied.

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