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Other types of polyethylene and PVC can also be used. Many films have about 500% stretch at break but are only stretched to about 100–300% in use. Once stretched, the elastic recovery is used to keep the load tight. There are two methods of producing stretch wrap: Blown: the resin is melted and extruded through an annular die, it is air ...
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 ...
The process of engineering more environmentally acceptable packages can include consideration of the costs. [36] Some companies claim that their environmental packaging program is cost effective. [37] Some alternative materials that are recycled/recyclable and/or less damaging to the environment can lead to companies incurring increased costs.
An overwrap or wrap is a method of sealing a contained product, typically as part of retail packaging. It is often made of plastic film (sometimes called polywrapping) or paper. [1] The wrap is applied over the bare product or can be applied over another form of packaging. It is typically used to protect products, but can be used decoratively.
A reusable package or container is "designed for reuse without impairment of its protective function." [ 1 ] The term returnable is sometimes used interchangeably but it can also include returning packages or components for other than reuse: recycling , disposal, incineration, etc. Typically, the materials used to make returnable packaging ...
Foamed polystyrene (sometimes referred to as Styrofoam) is in one of the most common types of plastics used for foodservice packaging, in the form of the foam food container. Non-foamed polystyrene is sometimes also used for utensils or plastic plates. Polyethylene and other plastics are also used. Plastic wrap is sometimes used to cover a tray ...