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Plastic wrap, cling film, Saran wrap, cling wrap, Glad 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 ...
When formed into a thin plastic film, the principal advantages of polyvinylidene chloride, when compared to other plastics, are its ability to adhere to itself and its very low permeability to water vapor, flavor and aroma molecules, and oxygen. This oxygen barrier prevents food spoilage, while the film barrier to flavor and aroma molecules ...
Commercial outputs were stopped and the entire production given over to military uses, leading to a large commercial demand and a backlog of orders after the war's end. [23] [24] In the post-war years Pliofilm saw use as a food wrap, to package drugs and textiles, and as a means of laminating paper. [11] [25] It was also marketed as Vitafilm. [25]
The Glad brand originated in the United States in 1963 when Union Carbide owner and CEO, David Darroch, launched Glad Wrap, a polyethylene film used as a food wrap. Douglas G. Taylor was transferred that same year from the Union Carbide facility in Pittsburgh, Pennsylvania to spearhead the Glad Wrap project.
The most well known use of polyvinylidene chloride came in 1953, when Saran Wrap, a plastic food wrap, was introduced. In 2004, however, the formula was changed to low-density polyethylene due to environmental concerns about its chlorine content and other disadvantages .
Shrink wrap is also commonly used within more industrial applications using a heavier weight shrink film. The principles remain the same with a heat shrinking process using a hand held heat gun. The following shrink wrap applications are becoming more widely used and accepted: Industrial shrink wrap containment of large plant equipment/components,
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