| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink backflow stopper composition which moves while scrapping off ink sticking to the internal wall of an ink storage part by adding at least an α-olefin oligomer and/or an ethylene-α-olefin copolymer, a fine powder silica and a fluorine-modified silicone oil. SOLUTION: A fluorine-modified silicone oil used in the ink backflow stopper composition has a side chain trifluorocarbon which repels ink sticking to the internal wall of an ink storage pipe off the internal wall face, so that the ink is scraped off by this composition. In addition, the composition hardly sticks to the internal wall of the ink storage part on account of the side chain trifluorocarbon of the fluorine-modified silicone oil used in the composition. Besides, since the loss of weight of the composition is little, it shows an ink scraping effect maintained until the complete consumption of the ink. |
