Writing utensil having excellent cap-off performance
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 21, 2006
Grant Date -
Feb 12, 2004
app pub date -
Nov 8, 2001
filing date -
Nov 9, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Provided is a writing instrument in which a pen tip comprising a fibrous feed or a plastic feed is coated with a coating agent comprising a substance providing a cap-off property, wherein a fluorine base surfactant and/or a silicone base surfactant are added to an ink for the above writing instrument, and/or a substance which is solid at room temperature and has a solubility of 5% or less in an ink solvent at room temperature and which has a polar functional group is added to the coating agent, whereby the writing instrument having an excellent cap-off performance can be obtained.
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