Plastic wrap, cling film (UK), cling wrap or food wrap, is a thin plastic film typically used for sealing food items in containers to keep them fresh over a longer period of time. Plastic wrap, typically sold on rolls in boxes with a cutting edge, clings to many smooth surfaces and can thus remain tight over the opening of a container without adhesive or other devices. Common plastic wrap is roughly 0.5 thou, or 12.5 µm, thick. Although as technology advances the trend has been to produce thinner thicknesses, particularly for household use (as not too much stretch is needed), so now majority of brands on shelves around the world have reduced to 8, 9 or 10 microns.
Plastic wrap was first created from polyvinyl chloride (PVC), which remains the most common material. PVC allows for permeability to water vapour and oxygen transmission. This permeability can add to the shelf-life or duration of peak freshness of the food products wrapped. There have been concerns about the transfer of plasticizers from PVC into food.
A common, cheaper alternative to PVC is low-density polyethylene (LDPE). It is less adhesive than PVC, but this can be remedied with the addition of linear low-density polyethylene (LLDPE), thereby also increasing the film's tensile strength.
- Wrapping premature babies in plastic wrap immediately after birth helps prevent low temperature before arrival to the neonatal intensive care unit.
- Containing external organs of babies with rare medical conditions before surgery.
- Stretch wrap, plastic wrap used in large-scale industrial/commercial packaging
- Wax paper
- Aluminium foil
- Coultate, Tom (2015-08-17). Food: The Chemistry of its Components: 6th Edition. Royal Society of Chemistry. ISBN 9781849738804.
- Cling Wrap Explained
- McCall, EM; Alderdice, F; Halliday, HL; Jenkins, JG; Vohra, S (Mar 17, 2010). "Interventions to prevent hypothermia at birth in preterm and/or low birthweight infants.". The Cochrane database of systematic reviews (3): CD004210. doi:10.1002/14651858.CD004210.pub4. PMID 20238329.
- "Baby girl born with her intestines on the outside of her body was saved when doctors wrapped her in CLING FILM". www.thesun.co.uk. Retrieved 2016-03-31.
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