polymeerfilms

Polymer films are thin, flexible sheets made from polymeric materials. They typically range from 5 to 200 micrometers in thickness and are valued for optical clarity, chemical resistance, and tunable barrier properties. Fabricated mainly by extrusion or solution casting, they serve as standalone films or as components in multilayer structures. In some contexts, the term polymeerfilms is used in German and related languages.

Common polymers include polyethylenes (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polystyrene (PS), as well as biodegradable options such as polylactic acid (PLA) and polyhydroxyalkanoates (PHA). Barrier performance, heat resistance, and mechanical strength are selected by polymer choice, blending, orientation, and coatings. Multilayer or metallized films are used to combine compatible properties.

The two primary extrusion-based methods are blown film extrusion and cast film extrusion. Blown film produces flexible wrap materials; cast film yields high-clarity sheets. Films can be oriented during processing to increase strength. Post-processing may include surface treatments (corona or plasma) and coatings to modify friction, printability, or barrier properties. Some films are produced by solvent casting when polymers are not melt-processable.

Packaging is the largest application, especially for food and consumer goods, where films provide moisture and gas barriers. Other uses include agricultural greenhouse films, medical and pharmaceutical wraps, protective and decorative films, and flexible electronic or photovoltaic encapsulation.

Environmental considerations emphasize recyclability and disposal. Monomaterial films are easier to recycle than multilayer structures, which combine incompatible materials. Biodegradable and compostable films are available but require appropriate facilities. Regulations on food contact safety and product labeling influence formulation.