| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition for a back flow preventing body for a writing tool which simultaneously satisfies ink following properties and ink back flow stopping properties and does not show remarkable changes in physical properties by being stored for a long time and application of shearing stress and is stable in an ink back flow preventing body arranged on the back end face of the ink directly stored in an ink storing pipe forwarding in accordance with consumption of ink. SOLUTION: A silicone oil is used as a base oil and one or two or more kinds of fatty acid amides are imcorporated therein. |
