| 摘要 |
PROBLEM TO BE SOLVED: To provide a refined cellulose fiber excellent in strength and elongation at break, a fiber-rubber composite material using the refined cellulose fiber and a tire having excellent tire properties using the same.SOLUTION: A refined cellulose fiber is provided by contacting a cellulose solution prepared by dissolving a cellulose raw material in a liquid containing an ionic liquid with a solidified liquid, and subjecting the cellulose to a wet or dry spinning. The refined cellulose fiber has a strength TB (cN/dtex) at 25°C and an elongation at break EB (%) that satisfy the following formulae (1) and (2). |
