Who invented the patent of recycled fiber?

Wang Qiandong. According to relevant information, the invention relates to a regenerated cellulose ultrafiltration membrane and a preparation method thereof. Regenerated cellulose ultrafiltration membrane includes regenerated cellulose hollow fiber ultrafiltration membrane and regenerated cellulose flat membrane. This invention was discovered by Wang Qiandong, Liu Biqian and He Min, but the patent belongs to Wang Qiandong.