In 2025, Changzhou Hefeng Packaging Materials Co., Ltd. applied for a patent for an extrusion screw used in optical PVA materials
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.
2025-07-02