JP2021115761A - Pen point, relay core, and liquid applicator including the pen point or relay core - Google Patents

Abstract

To provide a pen point and a relay core capable of suppressing the phenomenon of drain back in a central part of a tip of the pen point coming in contact with an applied object at the time of application (writing) by including both of passability of liquid, and capillarity (liquid holding force), and capable of stabilizing application (writing).SOLUTION: A pen point 2 is obtained by bundling fibers in the longitudinal direction followed by adhering with a resin binder, and molding in a desired shape, or by mixing a large number of two or more kinds of fibers having different melting points, bundling and compressing while aligning them in the longitudinal direction, and binding them by thermofusion between the fibers. A cross section of the pen point 2 has a pen point first area 2a and a pen point second area 2b. The total sum of the number of both areas is three or more, and at least a part of an outline of the pen point first area 2a is arranged in contact with and adjacently to the pen point second area 2b. A channel width between the fibers through which liquid passes, of the pen point first area 2a is smaller than a channel width between the fibers through which liquid passes, of the pen point second area 2b.SELECTED DRAWING: Figure 5

Description

The present invention relates to a pen tip and a relay core used for a liquid coating tool such as a writing tool and a cosmetic tool, and a liquid coating tool having the pen tip or the relay core.

For the fiber nib or relay core used for liquid coating tools for writing tools and cosmetic tools, the fibers are focused in the longitudinal direction and bonded with a resin binder, and then the tip and rear ends are formed into a desired shape by grinding or the like. It is a thing. Alternatively, a large number of two or more types of fibers having different melting points are mixed, aligned in the longitudinal direction, bundled and compressed, and bound by heat melting between the fibers.
Here, the pen tip of the present invention writes and applies the liquid supplied from the rear end portion to an object to be coated such as paper or skin at the tip portion.
Further, the relay core is for immersing the rear end portion of the relay core in the contained liquid and supplying a certain amount of the liquid to the coating pen tip by the capillary force of the relay core.

Conventional products of fiber nibs and relay cores are made of fibers having substantially the same diameter, and the width of the flow path between the fibers through which the liquid passes is substantially the same for the entire pen tip or the entire relay core.
However, if the diameter of the fiber is small and the width of the flow path between the fibers through which the liquid passes is small, the capillary force and the liquid holding force are increased, but clogging is likely to occur in the pen tip or the relay core depending on the composition of the liquid. There was a challenge. In particular, when the liquid of the liquid coating tool contains particles such as glitter and pearl pigments, the particles become significantly clogged in the pen tip or the relay core due to the filtering effect, and the clogging causes the passage of liquids other than the particles. There was a problem that the sex was also significantly reduced.
On the other hand, if the diameter of the fiber is increased and the width of the flow path between the fibers through which the liquid passes is increased in order to improve the passage of the liquid, the capillary force and the liquid holding force are weakened, and the liquid coating tool is turned upward. A phenomenon occurs in which the liquid or particles contained in the liquid return to the liquid storage part (drainback), and when the liquid coating tool is turned downward, liquid leakage (ink dropping phenomenon) occurs, and there is a problem that stable coating and storage cannot be performed. there were.

In recent years, a cursive that can smoothly supply an ink using a pigment to a coated surface and has less ink falling phenomenon when the coating tool is inverted has been disclosed (Patent Document 1). As a solution, the cursive is composed of a fiber located at the center thereof and a fiber having a diameter larger than the diameter of the fiber located at the outer peripheral portion.
However, in the case of the cursive structure disclosed in Patent Document 1, the outflow of the ink using the pigment is good at the initial stage of application, but when a certain period of time elapses with the pen tip facing upward, the fiber diameter becomes small and the liquid The ink containing the pigment is held in the outer peripheral portion where the flow path width between the fibers through which the liquid passes is small, but the ink containing the pigment is held in the central portion where the fiber diameter is large and the flow path width between the fibers through which the liquid passes is large. It has been confirmed in the tests of the inventors that the phenomenon of returning the ink to the liquid container (drainback) occurs. That is, in the central part of the tip of the cursive, which is a normal writing part, particles and liquids such as glitter and pearl pigments do not flow out smoothly, and some particles and liquids such as glitter and pearl pigments are retained. There was a problem that the writing angle had to be tilted on the outer peripheral portion of the writing.
Further, in the pen tip, since the central portion in contact with the surface of the object to be coated is composed of thick fibers during normal application (writing), the writing resistance increases during writing and a rough feeling occurs. For this reason, there is also a problem that the writing feeling is poor, the paper surface and the skin surface are easily damaged, and pain occurs when the object to be applied is the skin.

Japanese Unexamined Patent Publication No. 2011-255638

The present invention has been made in view of the above circumstances, and is provided with both liquid permeability and capillary force (liquid holding force), so that the tip of the pen tip that comes into contact with the surface of the object to be coated during application (writing) is provided. It is an object of the present invention to provide a pen tip or a relay core capable of stable application (writing) capable of suppressing the phenomenon of drainback at the central portion of the portion.

In order to solve the above problems, the pen tip of the present invention is a pen tip formed into a desired shape after bundling fibers in the longitudinal direction and bonding them with a resin binder, or two or more types of fibers having different melting points. A pen tip that is mixed in large numbers, bundled and compressed in the longitudinal direction, and bound by thermal melting between fibers, and the cross section of the pen tip has a pen tip first region and a pen tip second region. The total number of the first nib region and the second nib region is 3 or more, and at least a part of each outer shell of the first nib region is in contact with and adjacent to the second nib region. Or at least a part of each outer shell of the nib second region is arranged in contact with and adjacent to the nib first region, and fibers of the nib first region through which the liquid passes. The width of the flow path between the nibs is smaller than the width of the flow path between the fibers through which the liquid passes in the second region of the pen tip.

It is desirable that the area of the cross section of the pen tip first region is 1/9 to 9 times the area of the cross section of the pen tip second region.

It is desirable that the single thread of the fiber in the first region of the pen tip is 1.1 dtx to 7.7 dtx, and the single thread of the fiber in the second region of the pen tip is 5.5 dtx to 22 dtx.

The fibers are preferably polyamide fibers, polyester fibers or acrylic fibers.

The resin binder is preferably a polyurethane resin, a phenoxy resin, an epoxy resin, or a melamine resin, and the liquid may contain particles.

In the relay core of the present invention, fibers are bundled in the longitudinal direction, bonded with a resin binder, and then formed into a desired shape, or a large number of two or more types of fibers having different melting points are mixed and aligned in the longitudinal direction. A relay core that is bundled and compressed and bound by thermal melting between fibers, and the cross section of the relay core has a relay core first region and a relay core second region, and the number of the relay core first regions. And the total number of the relay core second regions is 3 or more, and at least a part of each outer shell of the relay core first region is arranged in contact with and adjacent to the relay core second region, or said. At least a part of each outer shell of the second region of the relay core is arranged in contact with and adjacent to the first region of the relay core, and the width of the flow path between the fibers through which the liquid passes in the first region of the relay core is the above. The second region of the relay core is smaller than the width of the flow path between the fibers through which the liquid passes.

It is desirable that the area of the cross section of the relay core first region is 1/9 to 9 times the area of the cross section of the relay core second region.

It is desirable that the single yarn of the fiber in the first region of the relay core is 1.1 dtx to 7.7 dtx, and the single yarn of the fiber in the second region of the relay core is 5.5 dtx to 22 dtx.

The fibers are preferably polyamide fibers, polyester fibers, or acrylic fibers.

The resin binder is preferably a polyurethane resin, a phenoxy resin, an epoxy resin, or a melamine resin, and the liquid may contain particles.

The liquid coating tool of the present invention includes the pen tip or the relay core.

According to the pen tip of the present invention, it has both liquid permeability and capillary force (liquid holding force), and when it is turned upward, the central portion of the tip of the pen tip that comes into contact with the surface of the object to be coated. It is possible to suppress the phenomenon of liquid drainback in. That is, since the required amount of liquid can be discharged during coating (writing), stable coating (writing) is possible.
According to the relay core of the present invention, it has both liquid permeability and capillary force (liquid holding force), and when it is turned upward, the liquid to be supplied to the central portion of the tip of the coating pen tip is relayed. It is possible to suppress the phenomenon of draining back to the liquid storage portion through the core. That is, since the required amount of liquid can be discharged during coating (writing), stable coating (writing) is possible.

FIG. 1A shows an example of a cross-sectional state of the pen tip before focusing the first pen tip region and the second pen tip region. FIG. 1B shows an example of a cross section of the pen tip after the first region of the pen tip and the second region of the pen tip are focused and bonded with a resin binder. FIG. 2A shows an example of a cross-sectional state of the relay core before focusing the first region of the relay core and the second region of the relay core. FIG. 2B shows an example of a cross section of the relay core after the first region of the relay core and the second region of the relay core are focused and bonded with a resin binder. An example of a vertical cross section of a liquid coating tool provided with a pen tip is shown. 4 (a) and 4 (b) show an example of a vertical cross section of a liquid coating tool provided with a relay core. FIG. 5A shows an SEM image of a cross section of the pen tip, and FIG. 5B shows an enlarged SEM image of FIG. 5A. FIG. 6A shows a conceptual diagram of the movement of particles in a liquid when the pen tip is directed downward, and FIG. 6B shows a conceptual diagram of the movement of particles in a liquid when the pen tip is directed upward. .. FIG. 7A shows a conceptual diagram of the movement of particles in the liquid when the relay core is directed downward, and FIG. 7B shows a conceptual diagram of the movement of the particles in the liquid when the relay core is directed upward. .. The outline of the particle size distribution measurement of the particles in a liquid is shown.

A mode for carrying out the present invention will be described with reference to FIGS. 1 to 8.

(Nib)
As shown in FIG. 3, in the pen tip 2 of the present invention, the liquid 4 supplied from the rear end portion of the pen tip 2 is written on an object to be coated such as paper or skin at the tip end portion of the pen tip 2. Apply.
The pen tip 2 is formed by bundling fibers in the longitudinal direction, passing them through a molding die, heat-processing them, impregnating them with a resin binder, drying them, adhering them, and then grinding them into a desired length and shape. Alternatively, a large number of two or more types of fibers having different melting points are mixed, aligned in the longitudinal direction, bundled and compressed, and bound by thermal melting between the fibers in a state where the fibers have continuous pores. Such binding means that when fibers having different melting points are thermally melted at a temperature between the melting points, the fibers having a melting point lower than the temperature are melted, and the fibers having a higher melting point are not melted. Therefore, the fibers having a lower melting point are not melted. A fiber having a high melting point adheres to a part of the outer peripheral portion of the above.

(Liquid composition)
The liquid 4 supplied to the pen tip 2 is applied to an object to be coated such as paper or skin, and is appropriately blended depending on the purpose and application. The viscosity of the liquid 4 is exemplified by 3 cps to 60 cps.
The liquid 4 may contain particles 4a such as lame and pearl pigments. The material and size of the particles 4a are appropriately selected depending on the purpose and application. The particle size is exemplified in the range of 1 μm to 500 μm, preferably 5 μm to 300 μm, and more preferably 10 μm to 200 μm.

(Material of nib fiber)
Synthetic fibers or the like are used as the fibers of the pen tip 2. Examples of synthetic fibers include polyester fibers such as nylon (registered trademark), polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate, and acrylic fibers.

(Structure of pen tip)
As shown in FIG. 1B, the cross section of the pen tip 2 has a pen tip first region 2a and a pen tip second region 2b. Further, in the cross section of the pen tip 2, the total number of the number of the pen tip first region 2a and the number of the pen tip second region 2b is 3 or more, preferably 10 or more, or 50 or more, and more preferably 100 or more.
At least a part of each outer shell of the pen tip first region 2a is arranged in contact with and adjacent to the pen tip second region 2b, or at least a part of each outer shell of the pen tip second region 2b is a pen tip. It is arranged in contact with and adjacent to the first region 2a.
The flow path width between the fibers through which the liquid passes in the pen tip first region 2a is adjusted to be smaller than the flow path width between the fibers through which the liquid passes in the pen tip second region 2b.
The shapes and sizes of the pen tip first region 2a and the pen tip second region 2b may be substantially the same or different. Further, the number of the pen tip first region 2a may be the same as or different from the number of the pen tip second region 2b.
A method for forming a pen tip structure having a pen tip first region 2a and a pen tip second region 2b in a cross section is appropriately selected, but as shown in FIG. 1A, the fibers of the pen tip first region 2a A fiber bundle having a flow path width between the fibers and a fiber bundle having a flow path width between the fibers in the second region 2b of the pen tip are uniformly or randomly bundled and bonded with a resin binder, or a resin binder is used. An example is a method of forming a pen tip structure as shown in FIG. 1 (b) by binding by heat welding without using it. In addition, a plurality of fiber bundles having a flow path width between the fibers of the pen tip second region 2b may be formed so as to be covered with fibers having a flow path width between the fibers of the pen tip first region 2a. On the contrary, even if a plurality of fiber bundles having a flow path width between the fibers of the pen tip second region 2b are formed so as to be covered with fibers having a flow path width between the fibers of the pen tip first region 2a. good. In either case, both the pen tip first region 2a and the pen tip second region 2b are arranged near the center of the cross section of the pen tip 2 (pen tip-object contact portion 2c).

The flow path width between fibers is adjusted by the diameter (thickness) of the fibers.
The fiber diameter (thickness) of the first region 2a of the pen tip is exemplified in the range of 1.1 dtex to 7.7 dtex, and more preferably the range of 2.2 dtex to 5.5 dtex.
As shown in FIG. 6B, when the pen tip 2 is turned upward, the liquid 4 and the particles contained in the liquid 4 once supplied to the tip portion of the pen tip 2 (pen tip-contact portion 2c to be coated). In order to prevent 4a from draining back to the liquid storage portion 5, the material and area ratio of the fibers of the pen tip first region 2a and the pen tip second region 2b, the diameter of the pen tip, the material of the liquid 4 and the particles 4a, etc. However, it is desirable that the diameter of the fiber in the first region 2a of the pen tip is adjusted to 7.7 dtex or less.
Further, in order to ensure the passage of the liquid 4, it is desirable that the diameter of the fiber in the pen tip first region 2a is adjusted to 1.1 dtex or more.

On the other hand, the fiber diameter (thickness) of the second region 2b of the pen tip is exemplified in the range of 5.5 dtex to 22 dtex, preferably 8.8 dtex to 22 dtex, and more preferably 9.9 dtex to 16.5 dtex.
As shown in FIG. 6A, when the pen tip 2 is turned downward, the liquid 4 (particularly when the viscosity is high) and the particles 4a contained in the liquid 4 use the wide flow path of the pen tip second region 2b. The material and area ratio of the fibers of the pen tip first region 2a and the pen tip second region 2b, and the pen tip so that it flows out and penetrates into the tip portion of the pen tip 2 (pen tip-object contact portion 2c). Although it depends on the diameter, the material of the liquid 4 and the particles 4a, and the like, it is desirable that the diameter of the fiber in the second region 2b of the pen tip is adjusted to 5.5 dtex or more.
Further, it is desirable that the diameter of the fiber in the second region 2b of the pen tip is adjusted to 22 dtex or less so that the liquid 4 does not fall and the liquid leakage phenomenon does not occur when the pen tip 2 is turned downward.
In addition, in order to make the flow path width between the fibers through which the liquid passes in the pen tip first region 2a smaller than the flow path width between the fibers through which the liquid passes in the pen tip second region 2b, the pen tip first region The fiber diameter (thickness) of 2a is set smaller than the fiber diameter (thickness) of the pen tip second region 2b.

(Pen tip first area and pen tip second area)
As shown in FIGS. 1 and 5, the cross section of the pen tip 2 has a pen tip first region 2a and a pen tip second region 2b.
As described above, the pen tip 2 of the embodiment of the present invention uniformly or randomly focuses the fiber focusing body of the pen tip first region 2a and the fiber focusing body of the pen tip second region 2b in a total of 3 or more. , When the nib is formed by bonding with a resin binder or by heat welding, the pen tip first region 2a is formed by the focusing state before the resin binder is bonded or the process of bonding with the resin binder or bonding by heat welding. And the cross section of the pen tip second region 2b has various shapes.
Further, the area of the cross section of the pen tip first region 2a and the pen tip second region 2b can be appropriately adjusted by the diameter of the fiber and the number of fibers thereof. When the total number of the number of the pen tip first region 2a and the number of the pen tip second region 2b is about 50 to 200, the fiber bundle of the pen tip first region 2a has 20 to 500 single threads focused. Examples of the fiber focusing body in the second region 2b of the pen tip are those in which 5 to 200 single threads are focused.

As shown in FIG. 6A, when the pen tip 2 is directed downward, the flow path width between the fibers of the pen tip second region 2b is larger than the flow path width between the fibers of the pen tip first region 2a. Therefore, the liquid 4 (particularly when the viscosity is high) supplied from the rear end portion of the pen tip 2 and the particles 4a contained in the liquid 4 use the flow path of the pen tip second region 2b rather than the pen tip first region 2a. Easy to flow. Here, since the pen tip second region 2b is in contact with and adjacent to the pen tip first region 2a, the liquid 4 and the particles 4a contained in the liquid 4 are from the liquid storage portion 5 to the tip portion of the pen tip 2. While flowing to 2c, in particular, a part of the particles 4a also migrates to the first region 2a of the pen tip, and the liquid 4 or the liquid 4 is transferred to the central portion (pen tip-contact portion 2c of the object to be coated) of the tip portion of the pen tip 2. The particles 4a contained in the pen have reached, and the reached liquid 4 and the particles 4a contained in the liquid 4 are used for writing and coating. At this time, the liquid 4 and the particles 4a that have flowed to the tip portion through the pen tip second region 2b are held by the capillary force of the pen tip first region 2a, so that the occurrence of liquid leakage from the pen tip is suppressed. can.
Further, as shown in FIG. 6B, when the pen tip 2 is turned upward, a part of the liquid 4 and the particles 4a flows through the flow path of the pen tip second region 2b and toward the liquid storage portion 5. Drain back. At this time, the liquid 4 and the particles 4a that have migrated to the first region 2a of the pen tip are held as they are in the central portion of the tip portion of the pen tip 2 (near the pen tip-contact portion 2c of the object to be coated) by the capillary force. Will be done.
When writing or coating is started with the pen tip 2 facing downward again, the tip portion of the pen tip 2 (near the pen tip-applied object contact portion 2c) is affected by the capillary force of the pen tip first region 2a without draining back. The retained liquid 4 and particles 4a can be immediately used for writing and application. Therefore, it is not necessary to wait for the liquid 4 and the particles 4a to be supplied from the liquid accommodating portion 5 to the pen tip 2, and the liquid can be smoothly applied.

The mechanisms such as the flow of the liquid 4 and the particles 4a, the migration between the regions, the drain back in the second nib region 2b, the holding by the capillary force in the first nib region 2a, and the suppression of liquid leakage are appropriate. The number, shape, and size of the pen tip first region 2a and the pen tip second region 2b, the cross-sectional area of the pen tip first region 2a, and the cross-sectional area of the pen tip second region 2b so as to work. The ratio of is adjusted as appropriate.
As shown in FIGS. 1B and 5, when the cross-sectional area of the pen tip first region 2a and the cross-sectional area of the pen tip second region 2b are almost the same (about 1 times the area ratio), they are almost the same. An example is that a fiber bundle in the first region 2a of the pen tip and a fiber bundle in the second region 2b of the pen tip having the same cross-sectional area are bundled in substantially the same number and bonded with a resin binder or bonded by heat welding. Will be done.
The ratio of the cross-sectional area of the pen tip first region 2a to the cross-sectional area of the pen tip second region 2b (the cross-sectional area of 2a / the cross-sectional area of 2b) is 1/9 to 9 times. It is preferably set in the range of 1/8 to 8 times, more preferably 1/7 to 7 times, or 1/6 to 6 times, 1/5 to 5 times, and 1/4 to 4 times. When the area ratio is smaller than 1/9, the amount of liquid 4 and particles 4a that drain back when the pen tip 2 is turned upward increases, and the capillary tube of the pen tip first region 2a when the pen tip 2 is turned downward. The amount of liquid retained by force is reduced. Further, when the area ratio exceeds 9, the flow path of the pen tip second region 2b is insufficient with respect to the flow rate of the liquid 4 and the particles 4a centering on the pen tip second region 2b, so that the adjacent capillary force is large. The liquid 4 and the particles 4a that have moved to the first region 2a of the pen tip and are about to flow tend to cause clogging.
The optimum area ratio range varies depending on the fiber diameter, fiber type, liquid 4 type and viscosity, particle 4a type and size, etc. of the pen tip first region 2a and the pen tip second region 2b. It will be adjusted accordingly.

(Resin binder)
A polyurethane resin, a phenoxy resin, an epoxy resin, a melamine resin, or the like is used as the resin binder of the pen tip 2.

(Relay core)
As shown in FIG. 4, in the relay core 3 of the present invention, the rear end portion of the relay core 3 is immersed in the contained liquid 40, and the liquid 40 is applied to the coating pen tip 20 by the capillary force of the relay core 3. It supplies a certain amount.
The relay core 3 is formed by bundling fibers in the longitudinal direction, passing them through a molding die, heat-processing them, impregnating them with a resin binder, drying them, adhering them, and then grinding them into a desired length and shape. Alternatively, a large number of two or more types of fibers having different melting points are mixed, aligned in the longitudinal direction, bundled and compressed, and bound by thermal melting between the fibers in a state where the fibers have continuous pores. Such binding means that when fibers having different melting points are thermally melted at a temperature between the melting points, the fibers having a melting point lower than the temperature are melted, and the fibers having a higher melting point are not melted. Therefore, the fibers having a lower melting point are not melted. A fiber having a high melting point adheres to a part of the outer peripheral portion of the above.

(Painting pen tip)
The coating pen tip 20 applies the liquid 40 supplied from the tip end portion of the relay core 3 and the particles 40a contained in the liquid 40 to a surface to be coated such as paper or skin. The tip portion of the relay core 3 is contacted and connected by inserting it inward from the rear end portion of the coating pen tip 20, and the liquid 40 flowing out from the tip portion of the relay core 3 and the particles 40a contained in the liquid 40 are connected. Is applied with the application pen tip 20.
The coating pen tip 20 is a bundle of threads made of a synthetic resin material such as polybutylene terephthalate (PBT), or a bundle of synthetic fibers such as acrylic fiber, polyester fiber, and nylon fiber hardened with urethane resin or the like. , PBT (polybutylene terephthalate) taper filaments, nylon taper filaments, etc. with tapered tips, as well as a three-dimensional network structure with continuous pores that communicate with each other, and have shape retention and appropriateness. Flexible products made of thermoplastic products such as polyolefin foam, each granular particle made of thermoplastic resin is partially fused to each other, and each granular particle is mutually communicated with each other. Examples thereof include those formed by a sintering method in which continuous pores are formed, and a porous body in which a thermoplastic resin is formed into a required cross-sectional shape and dimensions by melt extrusion molding.
The shape of the application pen tip 20 is appropriately selected according to the purpose and application, and is an oil-based marker, an aqueous marker, a board marker, a line marker, a paint marker, a correction pen, a liquid application tool for writing medical markers, a chemical application tool, and the like. Examples thereof include shapes used for cosmetic liquid application tools such as eye liners, eye shadows, eye blows, lip liners, lip glosses, concealers, nail care products, eyelash care products, and manuscript brushes.

(Liquid composition)
The liquid 40 supplied from the relay core 3 to the coating pen tip 20 is applied to an object to be coated such as paper or skin, and is appropriately blended depending on the purpose and application. The viscosity of the liquid 40 is exemplified by 3 cps to 60 cps.
The liquid 40 may contain particles 40a such as a pigment of lame or pearl. The material and size of the particles 40a are appropriately selected depending on the purpose and application. The size of the lame particles is exemplified in the range of 1 μm to 500 μm, preferably 5 μm to 300 μm, and more preferably 10 μm to 200 μm.

(Material of relay core fiber)
Synthetic fibers or the like are used as the fibers of the relay core 3. Examples of synthetic fibers include polyester fibers such as nylon (registered trademark), polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate, and acrylic fibers.

(Structure of relay core)
As shown in FIG. 2B, the cross section of the relay core 3 has a relay core first region 3a and a relay core second region 3b. Further, in the cross section of the relay core 3, the total number of the number of the relay core first region 3a and the number of the relay core second region 3b is 3 or more, preferably 10 or more, or 50 or more, and more preferably 100 or more.
At least a part of each outer shell of the relay core first region 3a is arranged in contact with and adjacent to the relay core second region 3b, or at least a part of each outer shell of the relay core second region 3b is a relay core. It is arranged in contact with and adjacent to the first region 3a.
The flow path width between the fibers through which the liquid passes in the relay core first region 3a is adjusted to be smaller than the flow path width between the fibers through which the liquid passes in the relay core second region 3b.
The shapes and sizes of the relay core first region 3a and the relay core second region 3b may be substantially the same or different. Further, the number of the relay core first region 3a may be the same as or different from the number of the relay core second region 3b.
A method for forming the relay core structure having the relay core first region 3a and the relay core second region 3b in the cross section is appropriately selected, but as shown in FIG. 2A, the fibers of the relay core first region 3a A fiber bundle having a flow path width between the fibers and a fiber bundle having a flow path width between the fibers in the second region 3b of the relay core are uniformly or randomly bundled and bonded with a resin binder, or using a resin binder. An example is a method of forming a relay core structure as shown in FIG. 2 (b) by binding by heat welding without using it. In addition, a plurality of fiber bundles having a flow path width between the fibers of the relay core second region 3b may be formed so as to be covered with fibers having a flow path width between the fibers of the relay core first region 3a. On the contrary, a plurality of fiber bundles having a flow path width between the fibers in the relay core second region 3b may be formed so as to be covered with fibers having a flow path width between the fibers in the relay core first region 3a. good. In either case, both the relay core first region 3a and the relay core second region 3b are arranged near the center of the cross section of the relay core 3 (relay core-applying pen tip contact portion 3c).

The flow path width between fibers is adjusted by the diameter (thickness) of the fibers.
The fiber diameter (thickness) of the relay core first region 3a of the relay core 3 is exemplified in the range of 1.1 dtex to 7.7 dtex, and more preferably the range of 2.2 dtex to 5.5 dtex.
As shown in FIG. 7B, when the relay core 3 is turned upward, it is contained in the liquid 40 or the liquid 40 once supplied to the tip portion (relay core-applying pen tip contact portion 3c) of the relay core 3. In order to prevent the particles 40a from draining back to the liquid storage portion 5, the material and area ratio of the fibers of the relay core first region 3a and the relay core second region 3b, the diameter of the relay core 3, and the liquid 40 and the particles 40a. Although it depends on the material and the like, it is desirable that the diameter of the fiber in the first region 3a of the relay core is adjusted to 7.7 dtex or less.
Further, in order to ensure the passage of the medium liquid 40, it is desirable that the diameter of the fiber in the relay core first region 3a is adjusted to 1.1 dtex or more.

On the other hand, the fiber diameter (thickness) of the relay core second region 3b of the relay core 3 is exemplified in the range of 5.5 dtex to 22 dtex, preferably 8.8 dtex to 22 dtex, and more preferably 9.9 dtex to 16.5 dtex. Will be done.
As shown in FIG. 7A, when the relay core 3 is turned downward, the liquid 40 (particularly when the viscosity is high) and the particles 40a contained in the liquid 40 use the wide flow path of the relay core second region 3b. The material, area ratio, and relay of the fibers of the relay core first region 3a and the relay core second region 3b so that the relay core 3 flows out and penetrates into the tip portion (relay core-applying pen tip contact portion 3c). Although it depends on the diameter of the core 3, the material of the liquid 40 and the particles 40a, etc., it is desirable that the diameter of the fiber in the second region 3b of the relay core is adjusted to 5.5 dtex or more.
Further, when the relay core 3 is turned downward, the fiber diameter of the relay core second region 2b may be adjusted to 22 dtex or less so that the liquid 40 does not fall and the liquid leakage phenomenon does not occur from the coating pen tip 20. desirable.
In addition, in order to make the flow path width between the fibers through which the liquid passes in the relay core first region 3a smaller than the flow path width between the fibers through which the liquid passes in the relay core second region 3b, the relay core first region The fiber diameter (thickness) of 3a is set smaller than the fiber diameter (thickness) of the relay core second region 2b.

(Relay core 1st region and relay core 2nd region)
As shown in FIG. 2, the cross section of the relay core 3 has a relay core first region 3a and a relay core second region 3b.
As described above, the relay core 3 of the embodiment of the present invention uniformly or randomly focuses the fiber bundle of the relay core first region 3a and the fiber bundle of the relay core second region 2b in a total of 3 or more. In the case of being formed by bonding with a resin binder or by heat welding, the relay core first region 3a may be formed by the focused state before the resin binder is bonded or by the process of bonding with the resin binder or bonding by heat welding. And the cross section of the relay core second region 3b has various shapes.
Further, the area of the cross section of the relay core first region 3a and the relay core second region 3b can be appropriately adjusted by the diameter of the fiber and the number thereof. When the total number of the number of the relay core first region 3a and the number of the relay core second region 2b is about 50 to 200, the fiber bundle of the relay core first region 3a has 20 to 500 single yarns focused. Examples of the fiber bundled body in the second region 3b of the relay core are those in which 5 to 200 single yarns are focused.

As shown in FIG. 7A, when the relay core 3 is directed downward, the flow path width between the fibers of the relay core second region 3b is larger than the flow path width between the fibers of the relay core first region 3a. Therefore, the liquid 40 (particularly when the viscosity is high) supplied from the rear end portion of the relay core 3 and the particles 40a contained in the liquid 40 use the flow path of the relay core second region 3b rather than the relay core first region 3a. Easy to flow. Here, since the relay core second region 3b is in contact with and adjacent to the relay core first region 3a, the liquid 40 and the particles 40a contained in the liquid 40 are transferred from the liquid storage portion 5 to the tip portion of the relay core 3. While flowing toward (relay core-applying pen tip contact portion 3c), in particular, a part of the particles 40a also migrates to the relay core first region 3a, and the liquid 40 or the liquid 40 or the like is transferred to the central portion of the tip portion of the relay core 3. The particles 40a contained in the liquid 40 reach, and the reached liquid 40 and the particles 40a contained in the liquid 40 are supplied to the coating pen tip 20 and used for writing and coating. At this time, the liquid 40 and the particles 40a that have flowed to the tip portion through the relay core second region 3b are held by the capillary force of the relay core first region 3a, so that the liquid 40 and the particles 40a are removed from the relay core 3. It is possible to suppress the occurrence of liquid leakage from the coating pen tip 20 due to dropping.
Further, as shown in FIG. 7B, when the relay core 3 is turned upward, a part of the liquid 40 and the particles 40a flows through the flow path of the relay core second region 3b and toward the liquid storage portion 5. Drain back. At this time, the liquid 40 and the particles 40a that have migrated to the first region 3a of the relay core are held as they are in the central portion of the tip portion of the relay core 3 (relay core-applying pen tip contact portion 3c) by the capillary force. NS.
When writing or coating is started with the relay core 3 facing downward again, the tip portion of the relay core 3 (near the relay core-applying pen tip contact portion 3c) due to the capillary force of the relay core first region 3a without draining back. The liquid 40 and the particles 40a held in the above can be immediately supplied to the coating pen tip 20 and used for writing and coating. Therefore, it is not necessary to wait for the liquid 40 and the particles 40a to be supplied from the liquid accommodating portion 5 to the coating pen tip 20 through the relay core 3, and smooth liquid coating is possible.

The mechanisms such as the flow of the liquid 4 and the particles 4a, the transition between the regions, the drain back in the second region 3b of the relay core, the holding by the capillary force in the first region 3a of the relay core, and the suppression of liquid leakage are appropriate. The number, shape, and size of the relay core first region 3a and the relay core second region 3b, the cross-sectional area of the relay core first region 3a, and the cross-sectional area of the relay core second region 3b so as to work. The ratio of is adjusted as appropriate.
As shown in FIG. 2B, when the cross-sectional area of the relay core first region 3a and the cross-sectional area of the relay core second region 3b are substantially the same (area ratio of about 1 times), the cross-sectional area is almost the same. It is exemplified that the fiber bundles in the first region 3a of the relay core and the fiber bundles in the second region 3b of the relay core are bundled in substantially the same number and bonded with a resin binder or bonded by heat welding.
The ratio of the cross-sectional area of the relay core first region 3a to the cross-sectional area of the relay core second region 3b (area of the cross section of 3a / area of the cross section of 3b) is 1/9 to 9 times. It is preferably set in the range of 1/8 to 8 times, more preferably 1/7 to 7 times, or 1/6 to 6 times, 1/5 to 5 times, and 1/4 to 4 times. When the area ratio is smaller than 1/9, the amount of liquid 4 and particles 4a that drain back when the pen tip 2 is turned upward increases, and the capillary tube of the relay core first region 3a when the pen tip 2 is turned downward. The amount of liquid retained by force is reduced. Further, when the area ratio exceeds 9, the flow path of the relay core second region 3b is insufficient with respect to the flow rate of the liquid 4 and the particles 4a centering on the relay core second region 3b, so that the adjacent capillary force is large. The liquid 4 and the particles 4a that have moved to the first region 3a of the relay core and tried to flow tend to cause clogging.
The optimum area ratio range varies depending on the fiber diameter, fiber type, liquid 4 type and viscosity, particle 4a type and size, etc. of the relay core first region 3a and the relay core second region 3b. It will be adjusted accordingly.

(Resin binder)
A polyurethane resin, a phenoxy resin, an epoxy resin, a melamine resin, or the like is used as the resin binder of the relay core 3.

(Liquid coating tool)
The pen tip of the present invention can be applied to liquid coating tools such as writing tools and cosmetic tools. Further, the relay core of the present invention can be applied to liquid coating tools such as writing tools and cosmetic tools.

Liquid coating tools include oil-based markers, water-based markers, board markers, line markers, paint markers, correction pens, medical marker writing liquid coating tools, chemical coating tools, eyeliners, eyeshadows, eyebrows, lip liners, lips. Examples thereof include gloss, concealer, nail care products, eyelash care products, cosmetic liquid application tools such as manukia brushes, and the like.

-Evaluation of pen tip (particle passage test)-
The samples listed in Table 1 were prepared for evaluation of the pen tip. Sample 1 is a pen tip which is one of the embodiments of the present invention, Sample 2 is a conventional thin single fiber core, Sample 3 is a conventional thick single fiber core, and Sample 4 is a lame particle used in an evaluation test. It is a liquid containing.

Based on the particle size distribution of the particles in the liquid used in the evaluation test of the sample 4, it was evaluated how the particle size distribution of the particles passed through the pen tip of each sample.
For evaluation, as shown in FIG. 8, the evaluation pen tip is inserted into the insertion tube provided at the bottom of the container filled with the liquid containing particles of the sample 4, and the liquid that has passed through the pen tip is used for evaluation. Each was collected. The particle size distribution of the collected liquid was measured to obtain the maximum particle size and the average particle size. Table 2 shows the results of the particle passage test.

With respect to the reference particle size distribution of sample 4, sample 1 which is one of the embodiments of the present invention and sample 3 which is a conventional thick single fiber core have substantially the same particle size distribution as the reference. It turned out that there was. On the other hand, in Sample 2, which is a conventional fine single fiber core, it was found that particles having a large particle size remained inside the evaluation pen tip and had low passability.

-Evaluation of pen tip (written test)-
The evaluation pen tip was incorporated into the liquid coating tool, and a writing test was conducted on paper.
First, half a day after incorporating the evaluation pen tip, writing was performed on the paper, and the writing status of the liquid in the initial stage of writing and the lame particles contained in the liquid was confirmed while expanding. The writing test was carried out by placing plain paper and making 20 reciprocations of zigzag writing with a width of 2 cm under a load of 100 gf.
Next, after the initial writing was completed, the pen tip was turned upward, the cap was closed, the cap was stored for one week, and the writing was performed again on the paper, and the writing status of the liquid and the lame particles contained in the liquid was expanded and confirmed. Table 3 shows the results of the written test.

In the early stage of writing, in sample 1 which is one of the embodiments of the present invention and sample 3 which is a conventional thick single fiber core, almost the same liquid and particles were observed in the handwriting, and the pen tip for evaluation was sufficiently used. It turned out that it was passing. On the other hand, in sample 2, which is a conventional thin single fiber core, the number of particles observed in the handwriting was smaller than that in sample 1 and sample 3, and it was found that the evaluation pen tip could not be sufficiently passed.

When the cap was closed with the pen tip facing up and stored for one week, liquids and particles were observed in sample 1, which is one of the embodiments of the present invention, to be about the same as or slightly less than the handwriting at the beginning of writing. Was done. This result indicates that liquids and particles were retained in the contact area between the pen tip and the object to be coated.
On the other hand, sample 3, which is a conventional thick single fiber core, which was a good result in the particle passage test and the writing test at the beginning of writing, is in a state where the liquid does not flow out to the extent that writing is impossible after storage for one week. It was. This result indicates that the liquid or particles in the pen tip have drained back to the liquid storage portion.
Furthermore, it was found that in sample 2, which is a conventional thin single fiber core, the number of particles observed in the handwriting was as small as in the initial stage of writing, and the pen tip for evaluation could not be sufficiently passed.

The liquid coating tool containing the pen tip or relay core of the present invention is capable of stable coating (writing), and the liquid contained in the liquid coating tool and particles such as glitter and pearl pigments have been conventionally applied. It is expected to be widely applied as a writing instrument and a cosmetic tool that can be applied without waste.

1 Liquid coating tool 2 Pen tip 2a Pen tip 1st area 2b Pen tip 2nd area 2c Pen tip-applied object contact part 20 Application pen tip 3 Relay core 3a Relay core 1st area 3b Relay core 2nd area 3c Relay Core-painting nib contact area 4, 40 Liquid 4a, 40a Particles 5, 50 Liquid container

Claims (11)

After bundling the fibers in the longitudinal direction and bonding them with a resin binder, a pen tip molded into a desired shape or two or more types of fibers having different melting points are mixed, bundled in the longitudinal direction, bundled and compressed, and between the fibers. It is a pen tip that is bound by heat melting.
The cross section of the pen tip has a pen tip first region and a pen tip second region, and the total number of the pen tip first region and the pen tip second region is 3 or more.
At least a part of each outer shell of the first pen tip region is arranged in contact with and adjacent to the second pen tip region, or at least a part of each outer shell of the second pen tip region is the pen tip. Placed in contact with and adjacent to the first region,
The width of the flow path between the fibers through which the liquid passes in the first region of the pen tip is smaller than the width of the flow path between the fibers through which the liquid passes in the second region of the pen tip. The pen tip according to claim 1, wherein the area of the cross section of the pen tip first region is 1/9 to 9 times the area of the cross section of the pen tip second region. The single thread of the fiber in the first region of the pen tip is 1.1 dtx to 7.7 dtx, and the single thread of the fiber in the second region of the pen tip is 5.5 dtx to 22 dtx, according to claim 1. Nib. The pen tip according to claim 1, wherein the fiber is a polyamide fiber, a polyester fiber, or an acrylic fiber. The pen tip according to claim 1, wherein the resin binder is a polyurethane resin, a phenoxy resin, an epoxy resin, or a melamine resin, and the liquid contains particles. After the fibers are bundled in the longitudinal direction and bonded with a resin binder, a relay core formed into a desired shape or two or more types of fibers having different melting points are mixed, bundled in the longitudinal direction, bundled and compressed, and between the fibers. It is a relay core bonded by heat melting,
The cross section of the relay core has a relay core first region and a relay core second region, and the total number of the relay core first region and the relay core second region is 3 or more.
At least a part of each outer shell of the relay core first region is arranged in contact with and adjacent to the relay core second region, or at least a part of each outer shell of the relay core second region is the relay core. Placed in contact with and adjacent to the first region,
The width of the flow path between the fibers through which the liquid passes in the first region of the relay core is smaller than the width of the flow path between the fibers through which the liquid passes in the second region of the relay core. The relay core according to claim 6, wherein the area of the cross section of the relay core first region is 1/9 to 9 times the area of the cross section of the relay core second region. The single yarn of the fiber of the relay core first region is 1.1 dtx to 7.7 dtx, and the single yarn of the fiber of the relay core second region is 5.5 dtx to 22 dtx, according to claim 6. Relay core. The relay core according to claim 6, wherein the fiber is a polyamide fiber, a polyester fiber, or an acrylic fiber. The relay core according to claim 6, wherein the resin binder is a polyurethane resin, a phenoxy resin, an epoxy resin, or a melamine resin, and the liquid contains particles. A liquid coating tool comprising the pen tip or relay core according to any one of claims 1 to 10.

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