Shrink packages

Wrapping, Bundling, and Shrink Packaging These techniques have limited applications for chemical prodiicts. Wrapping and... 

An oven in the form of a tunnel mounted over or containing a continuous conveyor belt is used to shrink oriented films in the shrink packaging process. Also use a hot air blower on the film to provide the heat required in specific areas. 

The higher crystalline fraction of the radiation cross-linked polyethylene even after a melt-freeze cycle has great technological merit for the heat-shrink packaging and electrical connector products. ... 

Hot blown plastic films usually do not possess sufficient orientation to be heat shrinkable at temperatures below 100°C. For certain shrink packaging applications low temperature shrinkage is essential and can be obtained by biaxial orientation below the melting point. Radiation crosslinking was found to facilitate orientation of these copolymers greatly because of the much greater bubble stability which results from crosslinking. 

In the use of shrink packaging where a polymer is oriented, wrapped around a package, and then heated to cause melting, shrinkage, and reduced orientation (see New Operations section, p. 174). 

Shrink film n. (1) Films which shrink when heated and are useful for packaging articles. (2) The pre-stretched or oriented film used in shrink packaging. 

Shrink packaging n. A method of wrapping articles utilizing pre-stretched (oriented) films that are warmed to cause them to... 

If the sheet has been subjected to biaxial orientation during extrusion (see Section 14.2), heating above the deformation temperature will cause the sheet to shrink. A tight package can be made by wrapping an article in a biaxially oriented sheet followed by a brief heat treatment. Such shrink packaging with polypropylene film is widely used for everything from lettuce and meats to books and video tapes. 

Experiments were conducted using three heat-shrink packaging films provided by a major shrink film manufacturer and supplier. These films comprised blends of linear low-density... 

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