PEN (Polyethylene Naphthalate) film has become a core material in flexible electronics, high-end packaging and other fields due to its high heat resistance, strong mechanical strength and excellent barrier properties. Its rigid molecular chain structure results in a narrow stretching process window, and its precision requirements for molding processes are far higher than those of conventional PET films, requiring professional equipment to support laboratory research and process optimization.
The FOCI-10 Film Biaxial Stretching Tester developed by POTOP Co., Ltd. is specially designed for R&D of high-performance films and perfectly adapts to the process characteristics of PEN films. Equipped with an independent temperature control system for upper and lower ovens, the equipment achieves a temperature control accuracy of ±3℃, which can accurately construct the gradient temperature field required for PEN stretching and effectively avoid film rupture and wrinkles caused by local temperature differences.
In addition, the tester supports free switching between simultaneous and sequential stretching modes, with a precisely adjustable stretching speed ranging from 0 to 500 mm/s, flexibly meeting different process requirements for the orderly orientation of PEN molecular chains.
The FOCI-10 Film Biaxial Stretching Tester developed by POTOP Co., Ltd. is specially designed for R&D of high-performance films and perfectly adapts to the process characteristics of PEN films. Equipped with an independent temperature control system for upper and lower ovens, the equipment achieves a temperature control accuracy of ±3℃, which can accurately construct the gradient temperature field required for PEN stretching and effectively avoid film rupture and wrinkles caused by local temperature differences.
In practical verification, using a 0.55 mm PEN base film as raw material, after 240 seconds of preheating, simultaneous stretching was performed at 190℃ with a stretching ratio of 5.0×. The formed film shows a thickness uniformity deviation of ≤3%, with a flat surface and uniform thickness. The real-time data acquisition system of the equipment can fully record key parameters such as stretching force, temperature and displacement, and automatically generate reports, providing accurate data support for process iteration.
