Barrier film is a type of packaging material designed to protect products from external elements such as moisture, oxygen, and light. It is commonly used in food packaging, pharmaceuticals, and electronics to extend shelf life and maintain quality. The film is typically made from various polymers that provide a strong barrier against contaminants. These films can be flexible or rigid and are often used in combination with other materials to enhance their protective qualities. Barrier films are essential in industries where product integrity is crucial, ensuring that items remain safe and effective until they reach the consumer.