JP6286831B2 - Applicator - Google Patents

Description

The present invention relates to a brush-like applicator in which a shaft cylinder in which ink is incorporated and a brush needle in which fibers having a taper are collected at the tip of the shaft cylinder are arranged via a fixing member.

Traditionally, animal hair with a taper at the tip of the fiber and a brush-like applicator with a synthetic resin fiber with a taper at the tip of the fiber is a means of writing beautiful handwriting with a smooth application feeling unique to a brush. Known as applicator.
However, since conventional brush-like applicators are brush brushes, the tip of the brush tip has soft elasticity, and the brush tip is easily bent even with light writing pressure. For this reason, it is difficult for a user who is unfamiliar with the handling of brushstrokes to make it difficult to apply strength at the time of application, and he / she cannot obtain a desired handwriting such as a thick handwriting or a thin handwriting.

  In order to solve this problem, it has been considered to increase the fiber diameter of the fibers constituting the brush head or to mix and combine polyester fibers having strong tip elasticity.

  However, the combination of such a fiber having a large fiber diameter or a polyester fiber having a strong tip elasticity can improve the brush elasticity as the blending ratio increases, but exceeds a certain ratio. As a result, the capillary force between the fibers is weakened, so that the brush heads are difficult to bundle and cracks of the brush heads are easily generated, and the function as an applicator cannot be exhibited. That is, there was a limit to increasing the brush elasticity.

Therefore, in order to solve such a problem, a resin for forming the pen tip is formed by extrusion molding, and a resin body having a radial ink flow path is formed inside, and then the resin body is used as a nozzle. In addition, a pen tip for a brush pen has been proposed in which a resin is allowed to flow and a skin is formed to rub the core into a cone shape or a shell shape, and the Shore D hardness of the pen tip is set to 48 to 54 ( JP-A-9-193588 (Patent Document 1)).
That is, by setting the Shore hardness of the nib of the resin body obtained by extrusion molding to 48-54, a hard brush feeling is obtained when applied, and it is easy to handle even for users who are unfamiliar with the handling of the brush head. A nib for a brush pen is obtained.

JP-A-9-193588

  However, the nib for a brush pen formed of the resin body described in Patent Document 1 can obtain a hard writing feeling when applied, but the nib is difficult to bend and the writing pressure is near the tip of the nib. There is a problem that the application feeling becomes hard and the smooth application feeling unique to a brush cannot be obtained.

The present invention relates to a brush-like applicator in which a shaft cylinder in which ink is incorporated and a brush needle in which tapered fibers are converged at the tip of the shaft cylinder are arranged via a fixing member. The D hardness is 70 or more and 90 or less, and the brush tip held by the fixing member has an elastic load (g) y due to each variation (mm) x from the tip of the brush obtained from the following brush tip elasticity test, y = brush-like applicator, characterized in that from 2.5x ² was set to fall within the scope of formula y = 9.5x ^2.

The present invention Oite a barrel which ink is incorporated therein, the brush-like applicator fibers arranged through the fixing member Fudeho which is focused to have a tapered distal end of the barrel, the fixed member And the elastic load y (g) due to each mutation x (mm) from the tip of the brush obtained from the brush tip elasticity test is as follows. having set from y = 2.5x ² as falling within the scope of formula y = 9.5x ^2, when adding a constant force at the time of application, and resilient elasticity can be obtained, easily adjust the writing pressure This makes it easy to carry the brush, and is easy to handle even for users who are unfamiliar with the handling of the brush head, resulting in a smooth writing characteristic unique to a brush.

The schematic side view of the brush-like applicator concerning this invention. The cross-sectional view of the brush-like applicator according to the present invention. The side view of the brush concerning this invention. The side view and sectional drawing of the brush ear concerning this invention. The cross-sectional view of the fixing member concerning this invention. The enlarged side view of the brush ear which protruded from the front-axis tip part. The graph which shows the range of the brush spike elasticity concerning this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an example of a brush-like applicator 1 according to the present invention. Reference numeral 2 is a brush head. The brush ear 2 is inserted and fixed to the fixing member 3, and the brush 2 and the fixing member 3 are inserted and fixed to the front shaft 4. The front shaft 4 is screwed to the rear shaft 5 in which ink is built. The brush-like applicator 1 is formed by these connections. The brush tip 2 is formed by converging in the longitudinal direction using a synthetic resin brush 6 having a tapered tip, and the rear end is formed by a method such as heat welding or adhesive.

More specifically, the brush tip 2 is composed of a brush 6 having a fiber diameter D of 0.20 mm obtained by tapering a fiber tip made of polyamide, and a fiber diameter D obtained by tapering a fiber tip made of polyester. Is mixed using a brush 5 having a thickness of 0.15 mm so as to be uniform, converged in the longitudinal direction, and its rear end is thermally welded.
In addition, the fiber diameter D of the brush 6 here means the diameter of the part which is not taper-processed.

The material of the synthetic resin fiber used for the brush 6 of the brush 2 is polyamide (6,6-nylon, 6-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, etc. ) Polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), polyurethane, polyacrylonitrile, acrylonitrile-styrene copolymer, acrylonitrile-butadiene copolymer, etc. can be used. It may be different.
Note that the material of the brush 6 used for the brush ear 2 may be one type, two types, or any number of types.

Moreover, the brush 6 which comprises the said brush ear 2 tapers the front-end | tip of synthetic resin fiber. Examples of the taper method include a method of processing with a treatment liquid. As a specific example, a combination of metacresol and calcium chloride-methanol solution is used for polyamide fibers, and a sodium hydroxide aqueous solution is used for polyester fibers. However, it is not necessarily limited to this method. For example, other methods such as a method in which a synthetic resin fiber is stretched in a tapered shape by heat stretching or a mechanical taper such as grinder polishing may be adopted. good.

Moreover, although the fiber diameter D of the brush 6 used for the brush ear 2 changes with manufacturing uses or a magnitude | size (thickness and length), the brush hair 6 in the brush ear 2 of the brush-like applicator 1 which concerns on this invention. Is configured using a material having a thickness of 0.10 to 0.25 mm. The reason for this is that if the fiber diameter D is less than 0.10 mm, the bristle elasticity becomes weak and the return of the brush head 2 at the time of application becomes worse. If the fiber diameter D exceeds 0.25 mm, the capillary of the brush 6 The force becomes weak and the brush 6 is difficult to converge, and the unit of the brush head 2 is deteriorated. Moreover, it is because a feeling of use worsens because an application feeling becomes hard.
The fiber diameter D of the brush 6 used for the brush ear 2 may be one type, two types, or any number of types.

In the present invention, the brush ear 2 is inserted and fixed to the fixing member 3 to hold the brush ear 2, the brush ear 2 and the fixing member 3 are inserted and fixed to the front shaft 4, and the rear shaft 5 in which ink is incorporated is moved forward. The brush-like applicator 1 is configured by being screwed onto the shaft 4. Then, configured to elastic load y from Fudeho tip obtained from Fudeho elasticity test by each mutant x (mm) (g) are within the scope of y = 2.5x ² equations y = 9.5x ² doing. That is, it becomes a region of the graph shown in FIG.
The purpose is to increase the elasticity of the brush 2 that is the application part, and the repulsive force of the brush 2 becomes stronger when a certain force is applied during application. This makes it easy to adjust the pen pressure, makes it easier to carry the brush, makes it easier for users who are unfamiliar with the handling of the brush head 2, and, in addition, to obtain a smooth writing characteristic unique to a brush. It is.

Further, Fudeho elasticity Fudeho 2 containing fixed member 3, each mutation x from Fudeho tip obtained from Fudeho resilience test (mm) by elastic load y (g) is from y = 2.5x ² y = 9.5x and exceeds the scope of formula of ^2, strongly repulsive force against writing pressure at the time of application is, while the brush strokes is improved, becomes too hard and feeling the coating, brush unique smooth coating A feeling cannot be obtained. In addition, if the brush elastic load at each variation of the brush 2 falls below each range, the repulsive force against the writing pressure at the time of application is weak, and the brush 2 is easily bent even with a light writing pressure. A user who is unfamiliar with the handling of the brush cannot carry the brush as he / she wants, and cannot write a desired handwriting such as a thick handwriting or a thin handwriting.

The brush elasticity test for obtaining the brush elasticity of the brush-like applicator 1 was measured under the following conditions.
Elasticity test: An applicator was set with a FUDOH rheometer RTC-3010D (manufactured by Rheotech Co., Ltd.) at a brush tip entry angle of 60 ° and a pressing speed of 2.0 cm / min. mm) was measured.

Further, the fixing member 3 that holds the brush head 2 covers the brush taper portion 8 of the brush head 2 and is configured such that the inner surface of the inner surface 10 of the fixing member is in contact with the outer periphery portion 9 of the brush head. . This is because the fixing member 3 of the brush head 2 is normally held by the brush head straight portion 8 of the brush head 2, so that the brush head 2 spreads out and is easily broken. Therefore, by covering the fixing member 3 in accordance with the shape of the brush taper portion 8 of the brush ear 2, the converging body of the brush 6 constituting the brush ear 2 is suppressed to the shape of the brush taper portion 8, thereby This prevents cracking of the brushhead. Furthermore, since the fixing member 3 is guided so as to converge around the brush 6 constituting the brush ear 2, the blending ratio of thick fibers or polyester fibers that are easily broken by the normal blending may be increased. It becomes possible, and it becomes easy to adjust the brush elasticity.

The reason why the inner surface 10 of the fixing member is in contact with the outer peripheral portion 9 is that the density of fibers constituting the brush 2 is improved and the elasticity of the brush is improved. Furthermore, the capillary force between the fibers is increased by improving the density, and the ink followability can be improved.

The fixing member 3 for holding the brush head 2 may be formed of a relatively hard material, but it is preferable to use a member formed of an elastic member such as an elastomer. This is because the fixing member 3 is usually formed of a resin body having no elasticity and is intended only for holding the brush head 2, so that only the portion in contact with the application surface of the brush head 2 is bent during application and the brush head 2 is bent. This is because only its own elasticity can be obtained. Therefore, the fixing member 3 is formed of an elastic member such as an elastomer and the brush 2 is held, so that when the writing pressure is applied at the time of application, the fixing member 3 is brought into contact with the application surface of the brush 2 together. This is because the rebounding force of the fixing member 3 against the writing pressure generated at the time of application is applied to the brush head 2 so as to give elasticity to the brush head.

Further, it is preferable that the Shore D hardness of the fixing member 3 is 70 to 90. This is because, when the Shore hardness of the fixing member 3 used for the brush ear 2 is less than 70, the fixing member 3 is also bent together with the brush ear 2 when a certain writing pressure is applied during application. However, the fixing member 3 is too soft, a repulsive force against the writing pressure is not generated, and the brush head 2 is bent too much together with the fixing member 3, so that the waist is not stabilized, and the application feels like a crumbled waist. . On the other hand, if the Shore hardness of the fixing member 3 exceeds 90, the fixing member 3 is too hard, and the effect that the fixing member 3 bends together with the brush 2 at the time of application cannot be obtained. Only the contact portion is bent and only the elasticity of the brush head 2 itself can be obtained.

The Shore D hardness of the fixing member 3 was measured according to JIS K7215 “Plastic Durometer Test Method”.

Further, the brush head 2 and the brush head protruding portion 12 protruding from the front shaft tip portion 11 of the fixing member 3 that holds the brush head 2 are partially or entirely welded or bonded together. preferable. This is because the protruding portion 12 including the brush head 2 and the fixing member 3 is not usually welded or bonded, and therefore, a displacement between fibers occurs at the portion contacting the application surface of the brush head 2 at the time of application. This is because the brush brush elasticity is weakened. Therefore, by bonding the brush head protrusion 12 including the brush head 2 and the fixing member 3 together, the brush head 2 is fixed, the waist becomes strong, and the brush elasticity is improved.

In addition, as a method of welding or bonding the brush head 2 and the brush head protruding portion 12 protruding from the front shaft tip portion 11 of the fixing member 3 over a part or the whole area, the brush head 2 has a low melting point. It is preferable that 10 wt% to 50 wt% of the brush 6 made of synthetic fiber is blended and fixed to a part or all of the fiber longitudinal direction between the fibers by heat treatment. This is because, usually, the brush 2 is not fixed between the fibers, so that when the brush is applied, a gap between the fibers is generated at a portion in contact with the application surface of the brush 2, and the writing pressure spreads on the application surface. This is because they are dispersed and the brushhead elasticity becomes weak. Therefore, by fixing between the fibers of the brush 2, there is no gap between the fibers in contact with the application surface of the brush 2, so that the brush does not spread and the writing pressure is concentrated on one point on the application surface. This makes it possible to improve the brushhead elasticity.

In addition, it is preferable that the mixture ratio of the brush 6 which consists of a low melting-point synthetic fiber which comprises the said brush ear 2 is 10 wt%-50 wt%. The reason for this is that when the low melting point fiber constituting the brush 2 is less than 10 wt%, the range in which the fibers can be fixed to each other is narrow, so that the fiber misalignment cannot be prevented satisfactorily, and the brush 2 at the time of application. Because it spreads. Further, if the low melting point fiber exceeds 50 wt%, the fibers adhere to each other in a wide range of the brush 2, and the ink penetration inside the brush becomes extremely worse. Furthermore, when the fibers are fixed over a wide range, the feeling of application becomes hard, and it becomes impossible to obtain an application feeling peculiar to a brush.
Further, means for adhering or welding a part or the whole of the brush 2 and the fixing member 3 of the brush protrusion 12 is not necessarily limited to this method.

For example, you may employ | adopt other methods, such as fixing the fixing member 3 comprised by the brush protrusion part 12 with the brush ear 2 by methods, such as infrared rays and heat welding. This is because by fixing the brush head 2 and the fixing member 3, there is no gap between the brush head 2 and the fixing member 3, it is possible to eliminate the play at the time of application, and to improve the application feeling. Because.
Moreover, you may use the method of fixing the brush outer periphery part 9 by the methods, such as an adhesive agent and heat welding, for a part or all of the brush ear 2. FIG.
However, it is preferable that the fixing of the brush ear 2 does not reach the center of the brush ear 2. This is because if the ink brush is fixed to the center of the brush tip 2, the ink penetration is biased outward and the ink does not penetrate inside the brush tip 2, so that the ink ejection is remarkably deteriorated.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an example of a brush-like applicator 1 according to the present invention. Reference numeral 2 is a brush head. The brush 2 is inserted and fixed to the fixing member 3, the brush 2 and the fixing member 3 are inserted and fixed to the front shaft 4, and the rear shaft 5 containing ink is screwed onto the front shaft 4. A brush-like applicator 1 in which the elastic load y (g) due to each mutation x (mm) from the tip of the brush obtained from the spike elasticity test falls within the range of the formula y = 2.5x ² to y = 9.5x ² Is configured.
In addition, the brush tip 2 was formed by using a synthetic resin brush 6 having a tapered tip and converged in the longitudinal direction, and a rear end formed by a method such as heat welding or an adhesive.
Specifically, the brush 6 of the brush 2 forms the brush 2 using a tapered polyamide fiber having a fiber diameter D of 0.20 mm and a tapered polyester fiber having a fiber diameter D of 0.15 mm. did.
Table 1 shows each of the examples in which the covering position of the fixing member 3, the Shore D hardness of the fixing member 3, and the presence or absence of the welding of the brush tip protrusion 12 were set, and a comparative example.

Table 2 shows the evaluation results of the sensory tests of Examples 1 to 18 and Comparative Examples 19 to 25 shown in Table 1.
The sensory test is as follows.

Sensory test (monitor test)
Method: The applicator was actually used by an arbitrarily extracted monitor, and a monitor survey was conducted for usability.
The evaluation items were taken as elasticity (strength of strength) writing taste and cracks in the brush head, and each was evaluated.
Elasticity (strength of stiffness): The applicator was applied to the paper surface, and the strength of the waist on the paper surface was evaluated by sensory evaluation.
Writing taste: The applicator was applied to the paper surface, and the feeling of application on the paper surface was evaluated by sensory evaluation.
Brush cracking: An applicator was applied to the paper surface to evaluate whether the brush cracks.

DESCRIPTION OF SYMBOLS 1 Brush writing applicator 2 Brush head 3 Fixed member 4 Front shaft 5 Rear shaft 6 Brush 7 Brush taper part 8 Brush straight part 9 Brush outer peripheral part 10 Fixed member inner surface 11 Front shaft tip part 12 Brush tip protrusion D Fiber outer diameter

Claims (4)

In a brush-type applicator in which a shaft cylinder in which ink is incorporated and a brush needle in which fibers having a taper are converged at the tip of the shaft cylinder are arranged via a fixing member, the Shore D hardness of the fixing member is 70. The elastic load (g) y due to each variation (mm) x from the tip of the brush obtained from the following brush elasticity test is y = 2.5x. A brush-type applicator characterized by being set to fall within the range of ² to y = 9.5 × ² .
The elastic test applicator was set with a FUDOH rheometer RTC-3010D (manufactured by Rheotech Co., Ltd.) at a brush tip entry angle of 60 ° and a pressing speed of 2.0 cm / min. ) To measure the elastic load (g). The brush-shaped applicator according to claim 1, wherein the fixing member of the brush is covered up to the taper portion of the brush, and the inner surface of the fixing member is in contact with the outer periphery of the brush. The brush-shaped applicator according to claim 1 or 2, wherein the fixing member of the brush tip is formed of a material having elasticity. 3. The brush head and a part or the entire region of the brush head protrusion protruding from the front shaft tip of the fixing member that holds the brush head is welded or bonded. The brush-like applicator described in 1.

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