| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ink backflow inhibitor composition for ballpoint pen. <P>SOLUTION: The ink backflow inhibitor composition for ballpoint pen comprises a refractory liquid and at least one puffing agent. The refractory liquid has the firing point of 250°C or over, and is in a liquid condition at the temperature of 20°C at one barometric pressure. The blending quantity of the puffing agent is 0.1 to 6.0 mass% based on the refractory liquid. The ink backflow inhibitor composition is especially suitable for a ballpoint pen including an ink tube of 1.6 to 2.7 mm in inner diameter for refilling ink. <P>COPYRIGHT: (C)2010,JPO&INPIT |
