In a professional plastic packaging system, shrink packaging is also commonly known as shrink wrapping and stretch wrapping are very popular and widely used. Although there are some obvious similarities between the two systems, and the comprehensive analysis considers completely different in material and operation.
In the case of shrink wrapping, the shrink film is used as the basic material and the heat forms an important part of the operation, and in the case of tensile packaging, the use of stretch film as the basic material is not heated during operation. Shrink wrap is at 3 or 4 stages, namely:
• Packaging (sleeve packaging or packaging)
• Seals (for packaging only)
• Shrink (use hot air) and
Stretch wrapping is done only in two phases, that is packing and sealing (most of the time, even without Sealing machine).
However, in many packaging applications, systems are considered to be substitutes for each other. These systems are mainly used for unification, but sometimes they also used as the main packaging system. These two systems for bulk packaging and retail pack.
In fact, these two systems are now being used in some major applications, such as casing mark or seal on various containers except packaging.
Materials play an important role in packaging systems because there is no proper material, proper shrink or stretch wrapping may be impossible. Therefore，It is absolutely necessary for anyone involved in the subject to understand the technology of the specification of materials or working very closely with material suppliers, preferably both.
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