JPH0825876A - Writing instrument with antibacterial wooden sheath - Google Patents

Abstract

PURPOSE:To allow a writing instrument having a wooden sheath of a pencil, a ballpoint pen to be sanitarily used by preventing proliferation of bacteria. CONSTITUTION:Glass in which several % of silver oxide is added is comminuted to form fine glass particles. The particles are dispersed in water. A wooden sheath 9 and the particle dispersed water are filled into a pressure-resistant treating vessel 7, which is depressurized and pressurized to impregnate the tissue of the sheath 9 with the water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument such as a pencil or a ballpoint pen having a wooden sheath subjected to antibacterial treatment.

[0002]

2. Description of the Related Art Writing instruments such as pencils and ballpoint pens are often shared by many people in public places. Met.

Particularly in hospitals, there is a high possibility that bacteria attached to writing instruments may be infected with a disease, and the risk has been pointed out, but almost no effective measures have been taken.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a wooden sheath of a writing instrument such as a pencil or a ballpoint pen is subjected to an extremely effective antibacterial treatment having a high sterilizing ability so that the writing instrument itself has an antibacterial action. It is intended to prevent various bacterial infections.

[0005]

To this end, the writing instrument with a wooden sheath, which has been subjected to the antibacterial treatment of the present invention, finely grinds glass to which a few percent of silver oxide has been added to form fine glass particles. While dispersing in water, a wooden sheath and the glass particle-dispersed water are placed in a pressure resistant treatment container, and the glass particle dispersed water is permeated into the tissue of the wooden sheath by depressurizing and pressurizing the pressure resistant treatment container. It is characterized by

[0006]

The glass particles containing silver oxide are impregnated in the wooden sheath. For this reason, the writing instrument spontaneously emits silver ions during use to exert an antibacterial function.

[0007]

An embodiment of the present invention will be described with reference to the drawings. Silver oxide (Ag ₂ O, AgO, Ag ₂ O _3, etc.) is added to the glass in a molten state by heating an inorganic substance such as silicate (SIO ₂ ) to a required melting temperature of about 1300 ° C.
About 5% to diffuse the silver oxide into the glass,
This is solidified by cooling, and then pulverized by passing it through a grinder to form fine glass particles of about 10 microns. Then, water is added to the glass particles to disperse the glass particles in water, thereby producing glass particle-dispersed water.

FIG. 1 shows an apparatus for permeating the glass particle-dispersed water into a wooden sheath, in which a vacuum pump 1 and a pressure pump 2 are placed in a cylindrical pressure-resistant processing container 7 via valves 3 and 4, respectively. In addition to piping, a liquid supply tank 6 is connected to the pressure resistant processing container 7 via a valve 5.

On the other hand, FIG. 2 shows a wooden sheath 9 which is a material for a pencil.
Indicates.

However, after the door 8 of the pressure-resistant processing container 7 is opened, the wooden sheath 9 is put in the pressure-resistant processing container 7 and the door 8 is airtightly closed, the vacuum pump 1 is operated to operate the pressure-resistant processing container 7. The inside pressure is reduced to about 720 mmHg. Further, the glass particle-dispersed water is preheated to about 80 ° C. and contained in the liquid supply tank 6. Then, by opening the valve 5, the glass particle-dispersed water is sucked into the pressure-resistant processing container 7 by the negative pressure in the pressure-resistant processing container 7, and the wooden sheath 9 is dipped in the glass particle-dispersed water.

Then, the valves 3 and 5 are closed, the valve 4 is opened, the pressurizing pump 2 is operated, air is sent into the pressure resistant processing container 7, and the pressure of the pressure resistant processing container 7 is 6.5 kg.
/ Cm ² approximately in the liquid surface of the glass particles dispersed water pressurized about 300 minutes in the pressure-resistant processing container 7 is raised keep the pressurized state. In this way, the pressure-resistant processing container 7 is temporarily depressurized and the air in the tissue of the wooden sheath 9 is discharged to the outside, whereupon the glass particle-dispersed water is immersed and the pressure is applied to the glass particle-dispersed water. It can penetrate deep into the tissue.

Then, the wooden sheath 9 was taken out of the pressure-resistant processing container 7 and allowed to stand naturally for about 17 hours (seasoning) in order to improve the fixing property of the penetrant liquid, and then forced by hot air at 60 to 70 ° C. for about 64 hours. After drying and evaporating water, the temperature of warm air is slowly lowered to room temperature over a period of about 24 hours. A pencil lead is sandwiched between the pair of wooden sheaths 9 thus obtained and bonded with an adhesive to make a pencil. Similarly, in the case of a ballpoint pen, a core (not shown) is similarly provided and a cap (not shown) is attached to make a ballpoint pen.

In the writing instrument thus manufactured, fine glass particles permeate and are fixed not only in the surface layer of the wooden sheath 9 but also in the deep part of the tissue, so that the moisture of the user's finger adheres to the wooden sheath 9. Then, silver ions spontaneously appear in water from the silver oxide contained in the glass particles. Although the antibacterial function of silver ion has not been elucidated in detail, it has an excellent antibacterial action to kill Escherichia coli, Pseudomonas aeruginosa, Trichophyton, MRSA (methicillin-resistant Staphylococcus aureus), etc., and black mold, blue mold, etc. The generation of mold can be strongly suppressed.

[0014]

INDUSTRIAL APPLICABILITY As described above, the writing instrument of the present invention can fix fine glass particles containing silver oxide even in the deep part of the wooden sheath, and therefore, even if the surface is scraped like a pencil, silver can be used for a long time. The antibacterial action of the ions can be sustained. For this reason, it is possible to always maintain hygiene without taking time and labor, and it is extremely effective in hygiene management of writing instruments in hospitals and the like.

The present invention can be applied to a wooden sheath made of a solid natural wood as described in the above embodiments, as well as a wooden sheath made of a wood fiber consolidated material obtained by solidifying wood chips.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a processing container showing an embodiment of an antibacterial processing device for a wooden sheath of a writing instrument according to the present invention.

FIG. 2 is a perspective view of a wooden sheath.

[Explanation of symbols]

 1 Vacuum Pump 2 Pressurizing Pump 6 Liquid Supply Tank 7 Pressure Resistant Processing Container 9 Wooden Sheath

Claims (1)

[Claims] 1. A glass to which a few percent of silver oxide has been added is finely pulverized to form fine glass particles, and the glass particles are dispersed in water, and a wooden sheath and the glass particle-dispersed water are placed in a pressure resistant processing container. A writing instrument with a wooden sheath having an antibacterial treatment, characterized in that the glass particle-dispersed water is permeated into the tissue of the wooden sheath by depressurizing and pressurizing the pressure resistant treatment container.