| 摘要 |
PROBLEM TO BE SOLVED: To provide a pen point for a writing brush pen, causing the discoloration of ink and better in flexibility as well as elasticity than those of a writing brush pen made of polyester fiber while having the function of the writing brush pen. SOLUTION: The pen point for a writing brush pen is provided with the shape of a porous writing brush pen consisting of a bundled fibrous body while the bundled fibrous body is made of a composite structure of polytrimethylene terephthalate fiber and polyurethane elastomer resin. |
