The BIAX process is a method of manufacturing battery separator films
The BIAX process, also known as biaxial stretching, is a method of manufacturing battery separator films that is used to improve the performance and safety of batteries. The process involves stretching the film in two directions, or axes, to create a highly oriented and uniform film. This results in a thinner, stronger, and more flexible film that is well suited for use as a separator in lithium-ion batteries.