发明名称 |
Oily ink composition for ballpoint pens |
摘要 |
An oil-based ink composition for a ballpoint pen has an ink viscosity at 25° C. is 200,000 mPa·s or more at a shear rate of 0.019 s−1 and 5,000 mPa·s or less at a shear rate of 10,000 s−1 and a storage modulus at an angular frequency of 0.019 rad/sec is 10 Pa or more. The ink composition ensures a thin-width writing line, without bleeding or feathering, and prevents ink-depleted regions at the central part of the writing line so that the writing line is uniform and clear. |
申请公布号 |
US9365732(B2) |
申请公布日期 |
2016.06.14 |
申请号 |
US201214241003 |
申请日期 |
2012.08.29 |
申请人 |
PENTEL KABUSHIKI KAISHA |
发明人 |
Otsubo Aya;Morimoto Yoshitaka;Kobayashi Yuichi;Koide Natsumi |
分类号 |
B43K7/00;C09D11/18;C09D101/26;B43K7/01;C08K3/04;C09D101/28;C09D105/00;C09D161/02 |
主分类号 |
B43K7/00 |
代理机构 |
Adams & Wilks |
代理人 |
Adams & Wilks |
主权项 |
1. An oil-based ink composition for a ballpoint pen, wherein the ink viscosity at 25° C. is 200,000 mPa·s or more at a shear rate of 0.019 s−1 and 5,000 mPa·s or less at a shear rate of 10,000 s−1 and the storage modulus at an angular frequency of 0.019 rad/sec is 10 Pa or more. |
地址 |
JP |