MAXIMILIAN STOCK LTD / SCIENCE PHOTO LIBRARY MAXIMILIAN STOCK LTD / SCIENCE PHOTO LIBRARY
Plastic film production. Worker monitoring the production of synthetic polymer plastic film. The plastic is first extruded into a thin film (top) and then cut lengthways into three and 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.
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