Plastics
| Wed 18 Feb 2026
Beijing, Feb. 18 -- Zhejiang Bangtai Machine Co Ltd has submitted a patent application for Extrusion Device of Multi-layer Co-extrusion Film Blowing Machine. Wu Lei, Fang Nan, Xue Kai, Dai Jinmin, Yuan Jielong, Wang Mingguang, Zhang Zongxi, Xu Sheng, Lyu Jikai and Zhang Ze developed the invention.
The patent application numbe..