| 摘要 |
PROBLEM TO BE SOLVED: To provide a writing brush pen made of highly elastic polyester zero in the degree of discoloration to the color of ink and excellent in function (stop, sweep-up or sweep-away) as a writing brush pen. SOLUTION: Polyester fibers wherein a single yarn is 1-10d and composite fibers comprising highly elastic fibers 1 wherein a single yarn is 1-20d and polyester fibers 2 form a plurality of gathering structures by the heat melting and/or solvent melting of a highly elastic component and an elastomer resin is bonded so as to surround the gathering structures to show a composite structure by the polyester fibers, the highly elastic fibers and the elastomer resin. |
