Wool can produce static charge towards surroundings through hairiness of fabric surface by rubbing,which can make the air ionize to create lots of anion.

• 羊毛是一种天然的蛋白质纤维,当受到摩擦时会通过织物表面的毛羽向周围空气放电,从而加剧空气电离产生负离子。