申请人:MITSUBISHI PENCIL KABUSHIKI KAISHA
公开号:EP0702066A2
公开(公告)日:1996-03-20
A non-aqueous ink for a ball point pen is disclosed herein which is accompanied by the feature of the non-aqueous ink excellent in the so-called cap-off performance that a writing performance does not deteriorate even when the pen is allowed to stand, with a cap being removed, and the feature of an aqueous ink that a low writing pressure can be used and blobbing does not occur. This ink comprises an organic solvent having a vapor pressure of 0.2 mmHg (20°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·s (25°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 to 40°.
本文公开了一种用于圆珠笔的非水性墨水,这种非水性墨水具有所谓的脱帽性能优异的特点,即在笔帽脱落的情况下,即使让笔静置,书写性能也不会变差,同时还具有水性墨水的特点,即可以使用较低的书写压力,也不会出现起泡现象。这种墨水由蒸汽压为 0.2 mmHg(20°C)或更低的有机溶剂、着色剂和凝固剂组成,非牛顿粘度指数为 0.2 至 0.5,粘度为 200 mPa-s(25°C,50 rpm)或更低。此外,该油墨的特点是含有一种自疏性载体,它与具有高表面自由能的材料(如不锈钢或青铜)表面的接触角在 5 至 40°之间。