Multilayer films are materials made by stacking multiple layers of different polymers or materials. Each layer can have unique properties, such as barrier resistance, flexibility, or strength, which can enhance the overall performance of the film. These films are commonly used in packaging, electronics, and medical applications due to their ability to protect contents from moisture, oxygen, and other environmental factors. The production of multilayer films often involves techniques like co-extrusion or lamination, allowing for precise control over the thickness and composition of each layer. This versatility makes multilayer films suitable for various industries, including food packaging, where they help extend shelf life, and pharmaceuticals, where they ensure product integrity.