JP5852838B2 - Brush for painting - Google Patents

Description

  The present invention relates to a coating brush in which wave hair and straight hair are mixed to increase the amount of paint contained.

As this type of painting brush, for example, one disclosed in Patent Document 1 has been conventionally known.
This conventional brush for painting is composed of relatively thick straight hair, relatively thin straight hair, and wave hair having the same thickness as the thin straight hair.
In the manufacturing process, the wave bristles are formed by sandwiching the bristles that are raw materials between a pair of rotating gear-shaped members, for example, and have a regular wave shape corresponding to the pitch of the gear teeth. is there.
Such wave hair and straight hair are combined and bundled to maintain the space around the wave hair, thereby increasing the amount of paint contained.

Such brushes have the property that the greater the amount of wave hair, the greater the amount of paint that is contained, but the lower the unity of the hair tips. Therefore, in the conventional brush for painting, the ratio of wave hair in the total amount of hair is set to 10 to 40% on the basis of the number of hairs.
Such a brush satisfies the unity of the hair tip while maintaining a certain amount of inclusion at around 10%, which is the lower limit of the mixing ratio of wave hair, and maintains a sufficient amount at around 40%, which is the upper limit. While maintaining a certain level of cohesion.

Japanese Patent No. 4455599

As described above, in the case of a conventional brush in which wavy hair and straight hair are mixed, when the amount of wavy hair is reduced to 10% on the basis of the number of hairs, priority is given to cohesiveness while sacrificing the amount. For this reason, a brush with the amount of wave hair reduced to 10% on the basis of the number of hairs is excellent in unity and is suitable for applications such as painting delicate areas such as corners and contours of paint areas, but the amount is sufficient There was a problem that was not.
On the other hand, a brush whose wave hair is increased to 40% on the basis of the number of hairs gives priority to the amount contained and sacrifices cohesion. For this reason, there has been a problem that it is difficult to paint delicate portions such as the corners and the contours of the painting area.
An object of the present invention is to provide a brush for coating that has good bundling properties at the time of painting, can be applied to delicate places, and can satisfy a sufficient amount at the same time.

The first invention relates to relatively thin wave hairs 10 to 25 (% by weight) made of synthetic fibers having a diameter of 0.07 (mm) and relatively thick wave hairs 10 made of synthetic fibers having a diameter of 0.1 (mm). 25 (weight%), relatively thin straight hair 35 to 50 (% by weight) made of a synthetic fiber having a diameter of 0.1 (mm) and relatively thick straight hair 15 to a synthetic fiber having a diameter of 0.125 (mm) 30 (wt%) are bundled, Rutotomoni are bound by the strap, these relatively narrow wave hair, relatively thick wave hair, the sum of a relatively narrow straight hair and relatively thick straight hair 100 ( wt%) and Do that hand, the relatively narrow wave hair is irregular the waveform shape, the relatively thick wave hair is regular its wave shape, the relatively narrow wave hair wave the number of repetitions of, the repetition of the wave of the relatively thick wave hair It is characterized by being smaller than the number .

The second invention is characterized in that the lengths of the hairs exposed from the bundling band of each hair are the same.

In the first invention, by providing relatively thin wave hairs and relatively thick wave hairs, many gaps for holding the paint are formed around the wave hairs, and the amount of paint contained is increased.
On the other hand, the relatively thin wave hair has a narrow diameter, and therefore has a lower waist than other hairs. When the tip of the hair bundle is pressed against the coating surface, the wave hair deforms along the stronger straight hair. In addition, the relatively thin wave hair has an irregular wave shape and a small number of wave repetitions, and thus has a portion close to a straight line unlike a thick wave hair. Therefore, this thin wave hair is easy to follow along the strong straight hair by the external force at the time of painting, and can maintain the unity of the tip together with the straight hair.

In this way, when the relatively thin wavy hair is not in contact with the paint surface, it maintains the space for holding the paint by the wave, while maintaining the cohesiveness like a straight hair when painting. it can.
In other words, at the lower limit of the mixing amount of wave hair, not only the unity but also the sufficient amount can be secured, while the unity can be applied to more delicate painting such as the corner of the corner and the contour of the painting area. There is no sacrifice in quantity.
Moreover, at the upper limit of the mixing amount of the wave hair, the cohesiveness at the time of painting is not sacrificed while increasing the amount of inclusion.

  According to the second invention, since the tips of all the hairs are aligned, the boundary line of the painting area can be finished more beautifully.

FIG. 1 is an external view of a coating brush according to an embodiment of the present invention. FIG. 2 is a table showing a mixing amount of each hair of the coating brush according to the embodiment. FIG. 3 is an enlarged view of the wave hair used for the brush of the embodiment, in which (a) is a relatively thick wave hair and (b) is a relatively thin wave hair.

An embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the painting brush according to this embodiment is obtained by bundling hairs with a binding band 1 to form a brush portion 2 and fixing the binding body 1 to a handle 3. The handle 3 of this embodiment is a wooden member having one end bifurcated, and the binding band 1 is fixed to the handle 3 by a wire 4 after the binding band 1 is sandwiched between the bifurcated portions. However, the material and shape of the handle 3 are not limited to this embodiment, and the brush portion 2 and the handle 3 may be fixed by any method.

The brush portion 2 is configured by mixing four types of hair shown in FIG.
That is, the brush part 2 has a thin wavy hair made of synthetic fiber having a diameter of 0.07 (mm), a thick wavy hair made of synthetic fiber having a diameter of 0.1 (mm), and a diameter of 0.1 (mm). This is a hair bundle in which fine straight hairs made of synthetic fibers and thick straight hairs made of synthetic fibers having a diameter of 0.125 (mm) are mixed and bundled by a bundle 1. And the said thin wave hair is a relatively thin wave hair of this invention, The said thick wave hair is a relatively thick wave hair, The said straight hair is a relatively thin straight hair, The said straight hair is a relative It is thick straight hair.

For example, monofilaments such as polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) can be used as the synthetic fibers constituting each hair, but depending on the use of the brush, the strength of the waist, the type of paint, etc. The type of resin can be selected based on the above. When the paint is water-based, most of the resins can be used. However, when the paint is an oil-based paint containing a solvent, it is necessary to select a resin that is hardly affected by the solvent.
The straight and thick straight hairs are straight hairs made of synthetic fibers having different diameters, but even if the material is the same resin, the thick straight hair is more rigid than the thin straight hair. Is high and has a function of keeping the entire brush portion 2 elastic.

Further, the wave hair is a hair to which a waveform is added as shown in FIG. FIG. 3A shows thick wave hairs, and FIG. 3B shows fine wave hairs.
In the manufacturing process, the thick wavy hair of FIG. 3 (a) is formed by pressing a gear or a mold to form a regular wave shape in the same manner as the wavy hair of the conventional brush for painting.
The regular wave shape is a shape in which the height, width, curve, etc. of each wave are fixed, and the number of repeated waves included in a predetermined length is determined.

On the other hand, the fine wave hair of FIG. 3B is a thin hair whose diameter is smaller than that of the thick wave hair, and has an irregular wave shape.
The irregular wave shape is a shape in which the height, width, curve and the like of each wave are not constant and the number of repeated waves included in a predetermined length is not determined.
Such irregular wave shapes are not formed by a mold, but are generated by, for example, heat treatment.

In this embodiment, the number of repeated waves of the fine wave hair is smaller than the number of repeated waves of the thick wave hair. For example, in the case shown in FIG. 3, the number of repeated waves within a predetermined length S is 3 for the thick wavy hair in FIG. 3 (a), whereas that for the thin wavy hair in FIG. 3 (b) is 1.5. .
Thus, in the said thin wave hair, it can be said that there is a part close | similar to a straight line locally that there are few repetition numbers of a wave.

The brush portion 2 is configured by mixing the four types of hair as described above. The amount of each hair at that time is set within the range of the amount of mixture shown in the table of FIG. %).
Furthermore, in this embodiment, the length L of all the hairs exposed from the cable tie 1 is made equal.

And as long as the mixing amount of each of the hairs is within the range of the mixing amount shown in FIG. 2, a sufficient amount can be realized as compared with the above-described conventional brush for coating.
For example, the thin wave hair and the thick wave hair each have a lower limit of 10 (% by weight), the thin straight hair is 50 (% by weight), and the thick straight hair is 30 (% by weight). The brush portion 2 has the smallest total amount of fine wave hair and thick wave.
Thus, even in the brush portion 2 where the mixing amount of the wave hair is minimized, the total of the thin wave hair and the thick wave hair is 20 (% by weight), and the wave hair of the conventional brush is 10 (%). The amount of wave hair mixed is greater than that of a brush.

In the conventional painting brush, the mixing amount of the wave hair is 10 to 40 (%) on the basis of the number, and in this embodiment, the mixing amount of the hair is set by weight%. However, if the hair thickness is the same with the same material, the number% and the weight% are the same. Therefore, 10% of the wave hair of the conventional brush and 10% of the thick wave hair of this embodiment (% by weight). ) Is not much different. In addition, the brush portion 2 of this embodiment further includes 10 (% by weight) of the fine wave hair. Since this thin wave hair has a larger number per weight than the thick wave hair, the brush portion 2 of this embodiment has a considerably larger number of wave hairs than the conventional brush and retains the paint. It is clear that the number of voids increases.
That is, with the brush of this embodiment, even when the mixing amount of the wave hair is minimized, the amount of inclusion can be increased as compared with the conventional brush.

In addition, the brush of this embodiment has a large amount as described above, but there is no problem in the unity of the brush portion during coating.
The reason is that the fine wavy hair behaves like a straight hair at the time of painting, while containing a large amount. Since the fine wave hair has a smaller diameter and does not have a lower waist than other hairs, the wave is easily crushed when the tip of the brush portion 2 is pressed against the painted surface. Fine wave hair has a non-uniform wave shape and originally has a straight portion, so coupled with the fact that the waist is weak, the wave is particularly easily crushed, and as a result, it follows the straight hair.
In other words, the amount of fine waves increases when they are immersed in the paint, but they can bend along the straight hair when painted and behave like the straight hair to maintain the cohesiveness of the brush portion 2.
Therefore, the brush of this embodiment can finish the corners and the contours of the paint area neatly.

The total amount of wave hair is 25 (wt%) for thin wave hair, 25 (wt%) for thick wave hair, 35 (wt%) for thin straight hair, and 15 (wt%) for thick straight hair. When the upper limit is set to 50 (% by weight), it is clear that the content is further increased.
On the other hand, as described above, 25 (% by weight) fine wavy hair containing paint behaves like straight hair and maintains unity when painted.
Therefore, the brush of this embodiment is equivalent to the case where the upper limit of the amount of wave hair mixed in the conventional brush is 40 (%) when the upper limit of the amount of wave hair is 50 (% by weight). It will not sacrifice the cohesiveness while realizing the overload.

  On the other hand, since the wave hairs of the conventional brushes have the same thickness as the straight hairs, their rigidity is relatively equal, and the waves are not easily crushed even when the brush part is plied. That is, even during painting, the wave hair is difficult to follow along the straight hair and has a characteristic of maintaining a gap around the hair. For this reason, the conventional brushes can increase the amount of wave hair mixed, but at the same time, the cohesiveness of the brush part is sacrificed.

Furthermore, in the brush of this embodiment, the length L of all the hairs of the brush part 2 is made equal. Thus, if all the hair lengths are made equal, the hair tips that come into contact with the painted surface are aligned, so that the corners of the corners and the painted area can be finished more beautifully.
However, even if there is a difference in the length of the hair, the above-mentioned fine wavy hair usually contains a paint in the gap formed by the wave and increases the amount contained, while it is pressed against the paint surface during painting. Therefore, it will bend straight along the straight hair and maintain the coherence of the tip together with the straight hair. Accordingly, equalizing all the hair lengths is not a requirement for achieving the object of the present invention.

  The painting brush of the present invention can be applied to the painting of a delicate area such as a corner or the outline of a painting area to a large area.

1 Tying band 2 Brush part L Hair length

Claims (2)

10-25 (weight%) of relatively thin wave hair made of synthetic fiber having a diameter of 0.07 (mm), 10-25 (weight%) of relatively thick wave hair made of synthetic fiber having a diameter of 0.1 (mm), Relatively thin straight hairs 35-50 (weight%) made of synthetic fibers with a diameter of 0.1 (mm) and relatively thick straight hairs 15-30 (weight%) made of synthetic fibers with a diameter of 0.125 (mm). bundled, are bound by the strap Rutotomoni, these relatively narrow wave hair, that Do relatively thick wave hair, the sum of a relatively narrow straight hair and relatively thick straight hair 100 (wt%) hand, the relatively narrow wave hair is irregular the waveform shape, the relatively thick wave hair is regular its wave shape, a repetition number of waves of the relatively narrow wave hair , smaller than the number of repetitions of the wave of the relatively thick wave hair Paint brush, which was formed by. Paint brush according to claim 1 comprising a length of hair to be exposed from the strap of each bristle Te same west.

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