Le 3 août 2016, 10:49 dans Humeurs • 0
In contrast to industrial shrink-wrap, that is certainly essentially a thicker gauge polyethylene film used in case over-wrap, retail display shrink film is available in a choice of 3 types of pictures. Because retail display shrink films are used to over-wrap, or unitize, products that are placed on retail shelves for consumers' choice and purchase, they need exceptional optical properties, excellent seal-ability and shrink-ability properties, as well as a reasonable cost per package.PVC, or poly vinyl chloride, was, arguably, the first available metallic film exporters in the retail industry. It has excellent optical properties, by using great resolution plus glossy, and, using relatively low temperatures, extremely easy seal and shrink characteristics. It also exhibits low shrink force properties, which can be varied. It is also available in various gauges, from extremely thin to relatively thick.
PVC has the capability to be oriented either bi-axially or uni-directionally, which allow it to be used in a very wide base of applications. It's low temperature characteristics are certainly an important benefit in packaging temperature-sensitive items, and its low shrink force is preferred when packaging flexible products such as sponges or brochures to keep them from buckling.In addition, aluminized film requires specially equipped packaging machinery to be properly sealed. In addition, many European and multinational manufacturers have banned the use of PVC films for perceived ecological reasons. PVC shrink film is actually a flick by using weak, and more limited, uses, and with limited supplier variety.
Polyethylene retail display shrink film is available only as a uni-directionally oriented film, with is primary shrink force in the machine direction. It does not posses exceptional optical properties, and is not available in extremely thin gauges. It is FDA and USDA approved for food and pharmaceutical applications, as well as easily and readily recyclable.It's primary benefit is its relatively low-cost. Historically, polyethylene films have been the lowest priced packaging material available. But, because of its limited optical benefits, it is used primarily as an industrial shrink film, as opposed to a retail display PVC heat sealing film, where extreme clarity and gloss is essential. In addition, its lack of bi-axial orientation properties limits its use to only certain packages. It's very soft modulus precludes its use in very thin gauges on high-speed equipment. It is, however, readily available from hundred of film manufacturers and suppliers.Thus, polyethylene retail display shrink films are used only where cost is the most important factor and where optical properties and machine-ability attributes are less demanding.