In 2025, Changzhou Hefeng Packaging Materials Co., Ltd. applied for a patent for an extrusion screw used in optical grade polyvinyl alcohol (PVA) materials. This technology focuses on improving the extrusion process of optical film materials, optimizing material uniformity and transparency to meet the high standard requirements for material quality in optical products.
The advancement of this patent reflects the company's continuous investment in the research and development of high-end functional thin film equipment, and promotes the upgrading of production processes for related optical materials.
