JPH08118872A - Antibacterial writing utensil and eraser - Google Patents

Abstract

PURPOSE: To enhance the retaining force of antibacterial effect and, at the same time, prevent cost-rise by a method wherein antibacterial agent is uniformly given to a grip member in a writing utensil, which is equipped with the grip member at the grip part of the writing utensil consisting of an inner mechanism and a shaft tube. CONSTITUTION: In a ball-point pen with a grip, a point 3, through the tip opening of which a tip guide 2 is projected, is provided at the fore part of an injection-molded shaft tube, while a knock cap 5 with a clip 4 is dismountably mounted at the rear part of the shaft tube. In this case, at the grip part of the shaft tube 1, a grip member 6, which is made of rubber or flexible plastic and to which antibacterial agent is uniformly given, is provided. Since valuable antibacterial agent is uniformly added only to the grip part, which is repeatedly touched by a hand, the writing utensil can manufacture economical].y. In addition, since the antibacterial agent is added also within the grip part, its effect can be kept even when the surface of the grip part is damaged through abrasion or the like as compared with the grip part, only to the surface of which the antibacterial agent is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial stationery suitable for use in public places such as government offices and hospitals, and more particularly to an antibacterial writing implement and eraser having a long-lasting antibacterial effect.

[0002]

2. Description of the Related Art Under the hot and humid climate conditions of Japan, it is said to be convenient for the generation and reproduction of microorganisms such as bacteria. In addition, writing instruments used in public places such as government offices and hospitals are required to be particularly clean.
In consideration of such a situation, hitherto, this type of antibacterial writing instrument has been proposed. Heretofore, as this kind of product, there has been proposed a product to which an antibacterial agent is applied by applying an antibacterial agent to the surface of a writing instrument.

[0003]

However, these conventional writing instruments have an insufficient antibacterial effect, a large amount of dust and the like are attached, and there is a problem in terms of cost. Therefore, the present invention eliminates the above-mentioned conventional drawbacks, provides an antibacterial agent with less dust and the like and efficiently disposes of an antibacterial agent, and provides a writing instrument and an eraser that increase the holding power of the antibacterial effect and do not increase the cost. To aim.

[0004]

In order to achieve the above object, according to the present invention, in a writing instrument having a grip member at a grip portion of a writing instrument comprising an internal mechanism and a barrel, an antibacterial agent is provided on the grip member. Thus, an antibacterial writing instrument containing the same can be obtained.

According to the second aspect of the present invention, an antibacterial writing instrument in which an antibacterial agent is contained in a bicolor molded barrel is obtained.

According to the third aspect of the present invention, there is obtained an antibacterial writing instrument in which the shaft cylinder is injection-molded and an antibacterial agent is mainly contained in a grip portion of the shaft cylinder.

According to the fourth aspect of the present invention, it is possible to obtain an antibacterial writing instrument in which the antibacterial agent is contained only in the grip portion of the barrel.

According to a fifth aspect of the present invention, the grip member of the shaft cylinder contains 1.0% of the antibacterial agent, and the other part of the shaft cylinder contains 0.5% of the antibacterial agent. An antibacterial writing instrument can be obtained.

According to a sixth aspect of the present invention, the shaft cylinder is composed of an inner layer made of a hard resin extruded and a thin outer layer made of a soft resin, wherein the outer layer has an antibacterial agent. An antibacterial writing instrument containing is obtained.

According to the seventh aspect of the present invention, there can be obtained an antibacterial writing instrument in which the resin of the outer layer is a polyolefin resin such as vinyl chloride or polypropylene.

According to the eighth aspect of the present invention, an antibacterial eraser containing an antibacterial agent uniformly is obtained.

According to the ninth aspect of the present invention, there is obtained a writing implement or eraser in which the above writing implement or eraser further contains a charging material.

According to the tenth aspect of the present invention, there is obtained an antibacterial writing implement or eraser in which the writing implement or eraser further contains protein powder.

[0014]

[Function] The antibacterial agent is efficiently contained in the material such as the resin of the writing instrument and the eraser, which is easily touched and worn by the human hand, so that the proliferation of the bacteria and the like can be permanently prevented even if they adhere. You can do it.

[0015]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure, the portion containing the antibacterial agent is shown by a number of points including the sectional view for convenience. FIG.
2 shows a ball-point pen with a grip according to the first embodiment of the present invention, in which a tip 3 from which a tip guide 2 is projected from a tip opening is provided at a front portion of a barrel 1 by injection molding. On the other hand, a knock cap 5 with a clip 4 is detachably attached to the rear part.

Further, the grip portion of the shaft cylinder 1 is provided with a grip member 6 made of rubber or soft plastic and containing an antibacterial agent uniformly. The reference numeral 7 is
It is a refill slidably provided on the axis of the barrel 1. As this antibacterial agent, Japanese Patent Laid-Open No. 3-19080
Those disclosed in No. 6, No. 4-149011, No. 4-243908 and No. 5-32407 are preferable.

The antibacterial ballpoint pen of Example 1 can be obtained as follows. Silver was used as a metal having an antibacterial action, and α-ZrP was used as a layered phosphate. α-Z
rP15.1 g was added with 0.5 M sodium chloride aqueous solution 150
It is put into a 5 ml sodium hydroxide solution and the pH is adjusted to about 4.
It was adjusted to 5 and kept at room temperature for about 6 hours with stirring. Thus, about 50% of the cation exchange capacity of α-ZrP was exchanged with sodium. Next, this solid phase was filtered, washed with water, added to 150 ml of a 0.34 M silver nitrate aqueous solution, and kept at room temperature for about 6 hours with stirring, and the sodium exchanged above was exchanged with silver. This solid phase is filtered, washed with water and then 100 to 1
It was dried at 10 ° C to obtain an antibacterial agent. The silver content of this antibacterial agent was 24.0%. It should be noted that the obtained antibacterial agent was uniformly contained in the rubber of the material for the grip member at a rate of 1% to prepare a grip member, and the obtained grip member was assembled together with other ball-point pen parts to the barrel to obtain the antibacterial ballpoint pen. can get.

According to the first embodiment, since the relatively expensive antibacterial agent is uniformly added only to the grip portion which is frequently touched by the human hand, it is economical and wears as compared with the case where it is applied only to the surface. Even if the surface of the grip member is damaged by the above, the antibacterial effect is not reduced because the antibacterial agent is added to the inside. Furthermore, there is an advantage that the antibacterial agent inside reaches a fine surface with the passage of time, and the antibacterial effect lasts forever.

Next, FIGS. 3 and 4 show a mechanical pencil in which a barrel 1 showing a second embodiment of the present invention is formed by extrusion molding. That is, in extrusion molding, a molding material is heated and pressed in an extruder having a cylindrical cylinder to be softened, melt-kneaded, and continuously extruded from a die (mold) attached to the tip to form a cross-section having the same shape. This is a typical method for continuously forming molded products.

In the figure, the barrel 1 formed by extrusion molding is composed of an inner layer 1a made of a double layer and made of a hard resin on the inside, and an outer layer 1b made of a soft resin on the outside. The thickness of the outer layer 1b is formed to be considerably smaller than that of the inner layer 1a. The reference numeral 7 is
A guide pipe for a mechanical pencil is shown. Thin outer layer 3
Contains an antibacterial agent containing silver as a main component (guest compound) in advance. Therefore, since a relatively expensive antibacterial agent is added only to the thin outer layer formed by extrusion molding, there is an advantage that the cost is low.

The antibacterial mechanical pencil of Example 2 is obtained as follows. AlP was used as the layered phosphate. AlP3.18g 0.02M, 0.05M,
To 200 ml of 0.07 M and 0.1 M silver nitrate aqueous solution, respectively, and with stirring, 1N sodium hydroxide aqueous solution 4
ml, 10 ml, 14 ml, and 20 ml p
H was added little by little so as not to exceed 7. About 6
After stirring for an hour, the solid phase is filtered off, washed with water and then at 100-110 ° C.
And dried to obtain a silver ion-modified phosphate intercalation compound.
The silver contents were 11.6%, 24.5%, 32.6% and 39.4%, respectively. Further, the ion exchange efficiency, that is, the ratio of ion-exchanged silver ions to the added silver ions was 96.0%, 95.2%, 95.5% and 95.5%, respectively. The obtained antibacterial agent is uniformly contained in a thin outer layer made of a soft resin of a two-color molded barrel obtained by extrusion at a ratio of 1% to obtain a barrel.
An antibacterial mechanical pencil is obtained by incorporating other mechanical pencil parts into the shaft cylinder thus obtained.

As a modified example of the second embodiment, only the grip portion of the outer layer 1b of the barrel 1 contains the antibacterial agent, or the grip portion of the outer layer 1b contains 1% of the antibacterial agent and the outer layer 1
The same effect can be obtained by adding 0.5% of an antibacterial agent to the remaining portion of.

Although each of the above-mentioned embodiments has described the antibacterial writing instrument, FIGS. 5 and 6 show a third embodiment of the present invention. It can also be applied as an antibacterial stationery to an antibacterial eraser obtained by uniformly adding an antibacterial agent to an eraser. That is, the eraser 8 is worn and reduced in a considerable ratio by being used all the time, but according to this embodiment, the antibacterial agent is uniformly contained in the entire eraser 8, so that the eraser is worn by the use. However, since the antibacterial agent is evenly present inside, there is an advantage that the antibacterial effect is not reduced as compared with the case where the antibacterial agent is applied only to the eraser surface.

The antibacterial eraser according to Example 3 is obtained as follows. Layered phosphate AlP, content in layered phosphate Ag 5.5%, NH ₃ 1.5%, composition of the metal salt aqueous solution at the time of adjustment 0.03 (mol / l) has an antibacterial action Metal nitrates (AgNO _{3 ,} Cu (N
Ammonia water or amine aqueous solution was added little by little to 200 ml of O ₃ ) ₂ , Zn (NO ₃ ) ₂ ) aqueous solution until a precipitate was formed and then it became transparent again. 20 g of the layered phosphate was added to the thus prepared solution of the ammine or amine complex of the metal having the antimicrobial activity, and the mixture was stirred and contacted for about 6 hours to intercalate ammonia or amine and the metal ion having the antimicrobial activity into the layered phosphate. Let me Next, the solid phase was filtered, washed with water and dried at 100 to 110 ° C. for 5 hours to obtain an antibacterial phosphate intercalation compound. The antibacterial agent thus obtained is uniformly contained in the material of the eraser in a ratio of 1% to obtain the antibacterial eraser.

Further, in each of the above-mentioned examples, it is more effective to add an electric-proof material together with the antibacterial agent. That is, since the plastic resin is a very good insulator, it is easy to be charged, and when it is charged, not only dust is easily attached and it becomes easy to be contaminated, but also an electric discharge phenomenon is caused to easily cause an accident such as an explosion. Therefore, for example, a conductive paint may be applied to the surface of the plastic molded product to improve its conductivity.

Further, when the protein powder (protein powder) is further uniformly dispersed in the above-mentioned writing instrument and eraser, the excellent effects of absorbing and releasing moisture such as sweat, antiglare property, antistatic property, vibration damping property, and friction resistance are obtained. is there. As the protein powder, for example, Protein Paint "Matiro" (trade name) sold by Idemitsu Petrochemical Co., Ltd. is suitable.

[0027]

As described above, according to the present invention, since the antibacterial agent is efficiently contained in the material such as the resin in the portion that is easily touched and worn by the human hand, even if bacteria or the like adhere. It is possible to obtain an inexpensive antibacterial writing instrument and eraser that can prevent its proliferation permanently.

[Brief description of drawings]

FIG. 1 shows a ball-point pen with an antibacterial grip according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 shows an antibacterial mechanical pencil composed of an extrusion-molded two-layer barrel according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a perspective view of an antibacterial eraser showing a third embodiment of the present invention.

6 is a cross-sectional view of the eraser of FIG.

[Brief description of reference numerals]

 1 Shaft cylinder 1a Inner layer 1b Outer layer 2 Tip guide 3 Tip tool 4 Clip 5 Knock cap 6 Grip member 7 Refill 8 Eraser

Claims (10)

[Claims] 1. A writing instrument having a grip member at a grip portion of the writing instrument including an internal mechanism and a shaft cylinder, wherein the antibacterial agent is uniformly contained in the grip member. 2. The antibacterial writing instrument according to claim 1, wherein the two-color molded barrel contains an antibacterial agent. 3. The antibacterial writing instrument according to claim 1, wherein the shaft cylinder is injection-molded, and an antibacterial agent is mainly contained in a grip portion of the shaft cylinder. 4. The antibacterial writing instrument according to claim 1, wherein the antibacterial agent is contained only in the grip portion of the barrel. 5. The antibacterial according to claim 1, wherein the grip member of the shaft cylinder contains 1.0% of the antibacterial agent, and the other part of the shaft cylinder contains 0.5% of the antibacterial agent. Writing instrument. 6. The shaft cylinder, which is composed of an inner layer made of a hard resin and a thin outer layer made of a soft resin, which is extruded, and the antibacterial agent is contained in the outer layer. Antibacterial writing instrument. 7. The antibacterial writing instrument according to claim 1, wherein the resin of the outer layer is a polyolefin resin such as vinyl chloride or polypropylene. 8. An antibacterial eraser containing an antibacterial agent uniformly. 9. The writing implement or eraser according to claim 1, wherein the writing implement or eraser further contains a charging material. 10. The antibacterial writing instrument or eraser according to claim 1, wherein the writing instrument or eraser further contains protein powder.