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Title:
WRITING INSTRUMENT
Document Type and Number:
Japanese Patent JPH07329480
Kind Code:
A
Abstract:

PURPOSE: To allow bacteria to be scarcely propagated even in the case of continuous use for a long time and to be scarcely adhered to hands, etc., by allowing antibacterial substance to dispersively exist as single particle or more within specific radius of at least the entire shaft surface.

CONSTITUTION: An antibacterial substance 12 is dispersed at least on the entire surface of one shaft of a writing instrument to be exposed solely or at the part of aggregate of the substance 12, and a space 13 is formed in a recess state on the periphery of the antibacterial substance 12. The quantity of the substance 12 is 0.1 to 5.0wt.% within thermoplastic resin when the contact surface with the shaft or the shaft of a cap is formed of the resin. The way of existing the antibacterial substance 12 on the surface area of the instrument is such that the substance 12 to be exposed on the surface corresponds to a sole particle or more within 10mm of a radius or an area of 50% or more of the surface area of the instrument by considering the contact with hands, etc. The antibacterial substance 12 is sprinkled on the entire surface of the shaft 1 by forming a high density area in which sole or a plurality of aggregates are disposed relatively closely, thereby obtaining an antibacterial effect with the small quantity of the substance.


Inventors:
NAGAHAMA MASAMITSU
ISHIGURO ATSUSHI
Application Number:
JP15520594A
Publication Date:
December 19, 1995
Filing Date:
June 14, 1994
Export Citation:
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Assignee:
PENTEL KK
International Classes:
B43K3/00; B29D99/00; (IPC1-7): B43K3/00; B29D31/00



 
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