Non-aqueous ink for ball point pen and ball point pen

Coating implements with material supply – Including ball – roller or endless-belt tool – Ball

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401215, B43K 700, B43K 708

Patent

active

058685111

ABSTRACT:
A pen which comprises a non-aqueous ink, the ink providing excellent cap-off performance in that the writing performance of the pen does not deteriorate even when the pen is allowed to stand exposed to air. The ink also provides a smooth feel when the pen is used for writing, and does not blob. This ink comprises an organic solvent having a vapor pressure of 0.2 mmHg (20.degree. C.) or less, a colorant and a coagulant and has a non-Newtonian viscosity index of 0.2 to 0.5 and a viscosity of 200 mPa.multidot.s (25.degree. C., 50 rpm) or less. Furthermore, the ink is characterized by containing a autolyophobic vehicle in which a contact angle to the surface of a material such as stainless steel or bronze having a high surface free energy is in the range of 5.degree. to 40.degree..

REFERENCES:
patent: 2979030 (1961-04-01), Harrington
patent: 3030925 (1962-04-01), Dyson
patent: 3166050 (1965-01-01), Fehling et al.
patent: 4077807 (1978-03-01), Kramer et al.
patent: 4091129 (1978-05-01), Schaeuble
patent: 4218251 (1980-08-01), Sanders
patent: 4492968 (1985-01-01), Lee et al.
patent: 5124719 (1992-06-01), Matsuzaki

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