retractil

Retractil, commonly known as shrink wrap, is a flexible plastic film that contracts when exposed to heat to form a tight, often tamper-evident package around a product. It is widely used in consumer goods, food, electronics, cosmetics, and industrial packaging to improve containment, protection, and display.

The dominant materials are polyolefins, including low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE). Polyolefin films are favored for their clarity, stretch resistance, and relative recyclability. PVC shrink films were common in the past but have declined in many markets due to environmental and health concerns. Other options include PET or PETG-based films for higher rigidity or stiffness. Typical film thickness ranges from about 12 to 120 microns, depending on the product size, protection level, and process used.

Manufacturing involves extrusion and sometimes orientation to create shrink characteristics. After forming, the film is cut into wraps or bags. Application methods include heat tunnels, hot air guns, or steam ovens, which cause the film to shrink tightly around the item or pallet.

Advantages of retractil films include efficient use of space, improved product containment, lightweight packaging, and potential tamper evidence. Limitations involve environmental impact, especially for multilayer or PVC films, challenges in recycling, and the need for compatible recycling streams. Biodegradable or compostable shrink films exist but often require specific conditions.

See also: shrink wrap, packaging film, polyolefin.