Polymer films are thin sheets made from long-chain molecules called polymers. These films can be produced from various types of polymers, such as polyethylene and polypropylene, and are widely used in packaging, electronics, and medical applications due to their flexibility and durability. These films can be transparent or opaque and can be engineered to have specific properties, such as moisture resistance or UV protection. Their versatility makes them suitable for a range of uses, from food packaging to protective coatings in solar panels and biomedical devices.