Plastic film production. Worker checking a roll of synthetic polymer plastic film. This plastic has been extruded into a thin film (top), and then cut into lengths and then wound up on rollers as seen here. Suitable polymers would be polyvinyl chloride (PVC), polyethylene (PE) or polypropylene (PP). Films like this are used to wrap articles in an air-tight manner. When used with food it is known as cling film.