JP2679956B2 - Fiber rod for pen nib, method for producing the same, and nib - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fibrous nib bar used for a nib of a marking pen, a method for producing the same, and a nib.

[0002]

2. Description of the Related Art As shown in FIGS. 8 and 9, a conventional rod 51 for a fiber nib made of fibers, which is made by bundling fibers in the longitudinal direction by heat processing and a resin binder, has a round or square cross section. It was formed into a mold, continuously manufactured, and cut into an appropriate length after manufacturing. Then, as shown in FIG. 10, the tip portion of the original bar 51 is further ground by a grinder or the like into a shape according to the purpose such as a chizuru type (only type) to form a pen tip 55, and the nib of the marking pen. It was used as body 53. The rear end side of the pen tip body 53 from the middle portion in the longitudinal direction is formed to have a smaller diameter than the front end side, and 64 indicates an annular step portion thereof.

[0003]

By the way, when the pen tip body 53 made of the original rod 51 is used for a marking pen as described above, it is inserted into the tip opening of the pen body 58 as shown in FIG. The tip of the pen shaft that holds the pen tip 53
The annular stepped portion 64 of 60 is engaged with the annular stepped portion 64, and the rear end of the annular stepped portion 62 is included in the batting 66 as an ink occlusion body for assembly. And after being assembled in this way, the pen nib 53
Absorbs ink not only from the rear end face but also from the surface (peripheral face) that comes into contact with the batting 66, and the ink is supplied to the pen tip 55 at the tip end via the capillary tube between the fibers. In FIG. 11, 68 is a tail plug.

Therefore, when the color of the pen shaft tip 60 that holds the pen tip 53 of the pen body 58 is white or light with a marking pen using ink having low viscosity and surface tension,
There is a problem that the ink easily spreads from the contact portion between the tip portion of the pen tip body 53 and the pen shaft tip portion 60 to the outside of the pen shaft tip portion 60 and is contaminated, resulting in an unsightly appearance. Marking pens for writing films, marking pens for overhead projectors (O.H.P.) and the like are typical examples in which the surface tension of ink has to be lowered due to their properties, and this defect is likely to appear. Further, since the fibers on the surface of both the original bar 51 and the pen tip body 53 are left bare, fluffing occurs and the pen tip 55 is easily broken, which adversely affects the writing performance.

Therefore, the present invention can solve the above-mentioned conventional problems, prevent the ink from bleeding from the pen tip and being transmitted to the tip of the pen shaft to be contaminated. It is possible to prevent fuzz on the surface of the pen nib and prevent the nib from collapsing.In addition, the color of the ink that appears on the nib when it is polished and the surface color of the nib other than the non-polished nib. An object of the present invention is to provide a fiber rod for a pen nib, a method for producing the same, and a pen nib that can develop an aesthetic color effect produced by the contrast with.

From the above, the present inventor thought that the object could be achieved by covering the surfaces of the original rod and the pen tip with some layer, and repeated various experiments. For example,
When applied to a chizzle-type highlighter pen that has a black coating on the surface of the original rod and pen tip, the contrast between the ink color of the polished nib and the black on the outside becomes vivid, In addition, when a pearl type is used for a highlighter pen, the fluorescent color of the ink penetrates and appears as a mixture of pearl colors, and it looks beautiful like an iridescent color or a caterpillar. It turned out to be the target.

However, the coloring of the coating of the fiber nib is extremely strict and is technically not easy unlike the usual case. That is, the following conditions must be cleared. First of all, it is necessary to prevent the ink flow of the pen tip by coating, and if the resin for coating penetrates into the inside of the pen tip and enters too much, the capillaries become clogged and the pen does not work. It is absolutely necessary to prevent resin from entering inside the surface because it has a fatal effect on the writing performance of the apex. Similarly, if colorants such as dyes and pigments enter the inside and are dyed to the inside, the effect of contrasting with the color of the ink at the corner is lost even if it does not affect the ink flow. Will ruin it. Secondly, since the pen nib contains water-based or oil-based ink and gets wet after assembling, the coating resin and adhesive must be durable against these inks. That is, the coating layer must not be peeled or swelled by the ink, and the ink must not cause the "bleeding phenomenon" in which the bleed, that is, the dye / pigment bleeds inside the nib body and contaminates it. Thirdly, the pen tip is cut to an appropriate length and the tip is usually used by polishing it into a chizuru type or a shell type. It is necessary to be able to polish it neatly without wearing it. For that purpose, the resin layer containing the colorant must have good adhesion without being too soft. As described above, the colored coating of the fiber nib has to satisfy the above-mentioned strict conditions, and thus the surface is not simply treated with a paint. Based on this recognition, the present inventor has completed the invention described below.

[0008]

[Means for Solving the Problems] That is, in order to achieve the above-mentioned object, an original rod for a pen nib made of fiber according to the invention of claim 1 bundles fibers in a longitudinal direction by heat processing and a resin binder. The surface of the fibrous pen nib original bar is coated with a vehicle (color-developing agent) containing a cellulose derivative containing a colorant as a coating film component. Generally, as the resin for coating, polyurethane, polyester, melamine, alkyd, epoxy, urea resin, phthalic acid resin, acrylic, acrylate ester, etc. are considered, but inside penetration prevention and easy drying, polishing Nitrocellulose, in terms of preventing fusion to the grinding wheel,
The best overall is a plasticizer (DBP, TCP) added to a cellulose derivative such as acetyl cellulose or benzyl cellulose. As the colorant, inorganic, organic,
Examples thereof include oil-soluble dyes, carbon black, black titanium, mica-based colorants, and metal powders surface-coated with synthetic resins.

According to the method of manufacturing the original bar for a fiber nib according to the second aspect of the present invention, when manufacturing the original bar for a fiber nib, which is formed by bundling fibers in the longitudinal direction by heat processing and a resin binder. After cutting the continuously manufactured raw bar to an appropriate length or before cutting, coat the surface with a vehicle containing a cellulose derivative containing a coloring agent as a coating component, and dry it. And a colored coating layer is formed on the surface of the original bar.
As a specific coating method, 1) a method of dipping in a colored resin liquid to apply, 2) spray coating, etc. can be used. However, in a general coating material, a resin or a colorant penetrates to the inside of the pen tip to fill the gap between the capillaries and cause clogging, which deteriorates the performance of the pen tip itself. It was confirmed by experiments that the following condition is essential to overcome the above condition and the cellulose derivative satisfies this condition. That is, 1) the paint has a viscosity of a certain level or more, and it is difficult for it to enter the inside of the pen tip body. 2)
Shorten the dipping time for applying the paint, 3) dry the paint quickly, and do not allow time to enter the inside of the original bar. 4) the resin for coating has good adhesiveness and can be cut or cut. Do not peel off in a polishing process or fuse to a polishing grinder. 5) The coating film has strong water resistance, solvent resistance, acid resistance, and alkali resistance, and is damaged by ink.
6) The coating resin has good luster and enhances the aesthetic effect of colorants and metallic pigments. 7) The colorant dissolves in the ink of the marking pen, rusts, or colors. Do not change the ink, be affected by the ink itself, or give it.

The fiber nib according to the invention of claim 3 is
The surface of the tip of the raw bar according to claim 1 is polished to form a pen tip having no coating coating.

[0011]

As described above, the surface of the original bar is coated with the vehicle containing the cellulose derivative containing the colorant as the coating film component, so that the ink can be used as a pen tip for marking pen. There is no bleeding on the outside of the tip of the shaft, and the tip of the pen shaft is not contaminated. Further, since the surface of the nib body is coated except for the nib, the fibers do not fluff.
In addition, by coloring this coating layer with a beautiful color of your choice, such as gold, silver, or pearlescent, the aesthetic effect is achieved by comparing the surface of the pen tip with the ink color of the polished pen tip. Can also be demonstrated.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of an original rod for a fiber nib according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along line XX of FIG. Reference numeral 1 is an original rod having a round cross section formed by fibers being bundled in the longitudinal direction by thermal processing and a resin binder, the surface of which is coated with a vehicle having a cellulose derivative containing a colorant as a coating film component. 2 is the colored coating layer. 3 and 4 are pen nibs 3 and 4 made from the original rod 1, respectively, whose tip surfaces are ground to form a chizuru type (FIG. 3) or a shell type (FIG. 4) according to the purpose of use. To be done. Reference numerals 5 and 6 are the polished nibs. Reference numerals 7 and 8 are annular step portions similar to the conventional ones.

FIGS. 5 (A) and 5 (B) show a manufacturing process for continuously manufacturing a raw bar having a colored coating layer from raw material fibers, 10 is a wound raw material fiber, and 11 is a tension roller. , 12 is a thermoforming section for thermoforming the fiber 10 through a pipe, 13 is a resin tank for immersing the fiber 10 in a resin, and the thermoforming section 12 and the resin tank 13 perform thermal processing and resin binder on the fiber 10. It acts to focus in the longitudinal direction. 14 and 15 are the preliminary drying section and the main drying section. Reference numeral 16 denotes a resin containing tank for coating with a colorant for forming a colored coating layer 2 on the surface of the original bar, which is formed and sent to the original bar 1 from the main drying unit 15. In this embodiment, the original bar is used. Plural units are installed in one feeding direction. The resin container 16 is shown in FIG.
A small roller for pulling the rod 1 near the inlet of the rod 1 for each tank as shown in enlarged form
It has 16a. Reference numeral 17 is a heat dryer for drying and curing the colored coating layer 2 formed on the surface of the raw bar 1. Reference numeral 18 is a tension roller that cooperates with the tension roller 11 to apply a predetermined tension to the fiber and the original bar to pull it, 20 is a cutter that cuts the original bar, and 21 is a receiving box that stores the cut product original bar. .

Next, a description will be given of an experimental example in which a raw bar is manufactured by using various resins as coating resins.

(Experimental Example 1) The resin for coating obtained from the above is placed in a plurality of resin storage tanks 16 installed in the manufacturing process line, and the fibers 10 are sequentially fed from the tension roller 11, and the fibers are thermally processed in the thermoforming unit 12 and the resin tank 13. Focused on binder action, both drying parts
It is dried and cured by passing through 14 and 15. The dried and hardened fiber 10 becomes an original rod 1 having a round cross section and further passes through a resin storage tank 16, and during this passage, it is squeezed while being immersed in the resin in the tank for a short time. This ironing is received multiple times in each tank, and a resin containing a coloring agent is applied to the surface with a predetermined thickness to form the coloring coating layer 2. Then, when it is dried and hardened by the heat dryer 17, the surface of the raw bar 1 becomes black and glossy. After being dried and hardened, the raw bar 1 is cut into a certain size by a cutter 20 and housed in a receiving box 21. As shown in FIG. 7, the length L of the original bar 1 obtained by cutting with the cutter 20
Is usually about 450 mm. This original bar 1 is cut into a length l suitable for use as a pen tip by another cutter (not shown), for example, 15 cm to 25 cm, and the tip is ground into a chizuru type or the like and shipped as a pen tip. It will be. When this example is used for a yellow highlighter pen, the polished nib is a yellow fluorescent color, and the part other than the nib (non-polished part of the pen tip) is a glossy black beautiful pen tip product. I was able to get it.

(Experimental Example 2) The coating resin obtained from the above was placed in a plurality of resin storage tanks 16 installed in the manufacturing process line, and fibers were sequentially fed in the same manner as in Experimental Example 1. As a result, an original bar 1 having a golden surface was obtained. In the case of this original bar 1, when the tip of the nib body was cut and polished to form the pen tip, it was possible to polish without fusing to the grindstone of the grinder. Moreover, 40 ° C to 50
The coating film was not attacked by the ink for 5 days even at a high temperature of ℃, and it could be used as an alkaline coloring fluorescent ink as a fiber pen that was stable over time.

(Experimental Example 3) The coating resin obtained from the above was placed in a plurality of resin storage tanks 16 installed in the manufacturing process line, and fibers were sequentially fed in the same manner as in Experimental Example 1. As a result, an original bar 1 having a pearl-colored surface was obtained. In the case of this original bar 1, when the tip of the nib body was cut and polished to form a nib, the adhesion was not well peeled off, and the coating film was stable without being damaged by the ink. When used for fluorescent color ink, the fluorescent color can be seen through the layer on the pearl surface, so they affect each other subtly, and the parts other than the pen point become beautiful iridescent colors for each color such as yellow, green, orange, pink, etc. The visible effect appeared.

In this embodiment, the manufacturing process line for one raw material fiber is shown, but similar lines may be placed in parallel to manufacture a plurality of fibers at the same time. Also,
In this embodiment, the raw material fibers that are continuously fed are color-coated, but in addition, it is applied to a raw bar that is cut in advance to a predetermined length (for example, the above-mentioned length of 15 cm to 25 cm). Needless to say, in this case, the tip of the original bar may be further polished to form the pen tip. When coating after cutting to a predetermined length, the cut raw bars are passed through the resin storage tank 16 one by one,
This will be repeated several times if necessary, but the resin storage tank 16 used at this time does not necessarily have to be provided in plural in the feeding direction like a continuous coating,
For example, only the arbitrary resin storage tank 16 provided at a predetermined position may be used. As described above, it is needless to say that the embodiment merely shows a preferable example, and the detailed design matters can be arbitrarily changed in the concrete implementation.

[0019]

Since the invention of claim 1 has the above-mentioned structure, even when the original rod is used as a pen tip, ink is bleeding from the pen tip and is transmitted to the tip of the pen shaft to be contaminated. Can be prevented. Further, it is possible to prevent fuzz on the surface of the raw rod made of fibers and prevent the pen tip from being easily broken. In addition, when used as a pen tip, the aesthetic color effect produced by the contrast between the color of the ink appearing on the polished nib and the color of the pen tip other than the non-polished nib should be exhibited. It is possible to improve the design. According to the invention of claim 2, it is possible to mass-produce the above-mentioned original bar. According to the invention of claim 3, it is possible to obtain a pen tip having an effect similar to that of the original bar.

[Brief description of the drawings]

FIG. 1 is a front view of an original rod for a fiber nib according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line XX of FIG.

FIG. 3 is a front view of a chizuru type pen nib.

FIG. 4 is a front view of a shell type pen nib.

5 (A) and 5 (B) are schematic views showing a manufacturing process of a raw bar.

FIG. 6 is an enlarged view of a resin storage tank.

FIG. 7 is a front view showing a manufactured original bar.

FIG. 8 is a front view of a conventional original bar.

9 is an enlarged cross-sectional view taken along the line YY of FIG.

FIG. 10 is a front view of a conventional chizuru type pen nib.

FIG. 11 is a vertical cross-sectional front view of a state in which a chizuru type pen nib is attached to a pen body.

[Explanation of symbols]

 1 original bar 2 colored coating layer 3,4 nib 5,6 nib 10 raw material fiber 11 tension roller 12 thermoforming part 13 resin tank 14 predrying part 15 main drying part 16 resin storage tank 17 heat dryer 18 pulling roller 20 Cutter 21 Inbox

Claims (3)

(57) [Claims] 1. An original rod for a fiber nib, which is formed by bundling fibers in a longitudinal direction by heat processing and a resin binder,
A fibrous pen nib master, the surface of which is coated with a vehicle having a coloring agent as a coating component and coated with a cellulose derivative. 2. When manufacturing a fiber rod for a pen nib, which is formed by bundling fibers in the longitudinal direction by heat processing and a resin binder, the rod continuously manufactured is cut into an appropriate length. After or before cutting, the surface is coated with a vehicle having a coloring agent containing a cellulose derivative as a coating film component to be coated, and dried to fix it to form a colored coating layer on the surface of the raw bar. A method for producing a master bar for a fiber nib that is characteristic. 3. A fibrous nib body, characterized in that the surface of the tip end of the original rod of claim 1 is ground to form a pen nib without a coating coating.