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A wrapping machine is used to wrap a flexible material like plastic sheet
or film, foil, paper or other materials around a product. They can be used
to wrap a product vertically or horizontally.
The package wrapping machine is mainly consists of rolling frame, pulling
machine, odd-track machine etc. Wrapping machine is suitable for the
packaging of solid object with regular form. Such as biscuit, bread, sweet,
everyday thing and and industrial part and so on.
- Shrink Wrapping: Shrink wrapping is a process that uses
relatively soft polyolefin film in which a loose sheath of film is
created around the product, often sealed on two sides. The loosely
sheathed product passes through a heat source, which shrinks the film to
the dimensions of the product. The result is a very tight wrap,
conforming to the product shape, often with a ridge of plastic around
the perimeter of the product or gaps in film on either end. Shrink wraps
are typically stronger than overwraps and the machines are inherently
The downside is that shrink wraps can be less attractive than
overwraps. And operational costs are often higher because of film waste
and energy consumption. "stretch" and "shrink"
obviously don't mean the same thing. Stretch wrappers, a popular choice
for wrapping pallet loads of products, achieve tight wraps by expanding
the stretch film-rubber-band-like-before enveloping the product and
letting the film return to its original size.
- Flow Wrapping: Flow wrapping is a horizontal-motion process
in which product of any shape is wrapped in clear/ printed PP film. The
end result is a flexible package with a non-lap type seal on the bottom
and crimped end seals. Both the process and films in flow wrapping are
quite different from overwrapping. Flow wrap BOPP films, for example,
need only to seal to themselves. Overwrap films need to seal to
themselves and the other side. There are zillions of products that are
flow-wrapped. Think wipes, tissues, vending machine candy bars, etc.
- Overwrapping: Overwrapping is a process in which a box-shaped
carton, tray, bundle, etc. is wrapped and sealed in any of a variety of
relatively stiff, single- or multi-ply web materials including clear,
printed or metalized polypropylene (PP), cellophane, paper, glassine,
waxed paper, aluminum foil or metalized paper/BOPP (biaxially oriented
polypropylene). The end result looks like a "gift wrap," with
one long seam located either on the bottom or side of the package and
each end of the package neatly "tucked, folded and sealed."
The first tuck-and-fold machines were designed in the 1920s by the
original Package Machinery Company. Tear tape is often used as an
easy-open feature. Overwrapping machines are built in elevator, in-line,
turret or rotary styles. Examples of overwrapped products include
cigarettes, Easter "PEEPS" candies, CDs/DVDs, frozen food
cartons, cartons/boxes of tea.