An Introduction To Shrink Wrap Machinery

The shrink wrap process includes two levels - the enveloping of the pack in shrink wrap possibly totally or partly and - the application of warmth to the shrink wrap film which activates the material’s memory of its non-stretched molecular chains.

The software of shrink wrap can be divided into two principal kinds - transit and screen.


The function of transit packaging is to provide the lowest expense selection for packaging. The material utilised is practically completely polyethylene, which will give the appropriate power at the cheapest offered expense. A typical application is the collation of specific packs with or with out tray assist. The most frequent use of the forgoing entails the packaging of a amount of cans or bottles or cartons for distribution.

The gear used requires a sleeve or bundle sealer working in conjunction with a shrink tunnel. Two rolls of materials create a sleeve of film around the pack, which is then processed by way of the tunnel. Usually, these open up sleeves do not cause any down sides to the pack integrity despite the fact that a modification can be made to the tunnel whereby an try is made to have the hole closed through excessive, annealed film.

A considerable quantity of automation is supplied for this procedure so that a single may possibly uncover a complete assortment of manual, semi and totally automated sealers and at optimum through-set, 1 can locate lines with speeds of up to 200 packs for each minute.

The processing of polyethylene is distinguished by the need to have for the shrink wrap film to get to an nearly melt state, soon after which cooling will provide considerable additional shrink. As a consequence, tunnels require distinct cooling products if elevated output speeds are needed.

All of this equipment might be used to wrap individual packs in which collation is not necessary but a degree of defense is necessary. Programs could differ from radiators through to office doors and bolts of fabric.


The similar processes are also used but with display shrink film the place merchandise have a normal need to use a sleeve. Reward wrap and wallpaper rolls fall into this category. The principles remain the same although both the sealer and tunnel will be modified to accommodate individual rolls with correctly modest diameters.

Turning to mainstream exhibit programs, the major attribute is the use of a complete wrap.

In each solitary scenario, the sealer have to now produce a flat, two-dimensional bag close to the merchandise.

The product and this bag are then processed by means of a shrink tunnel to obtain the wanted influence.

At Shrink Tunnel Machine , this is achieved using an L-Sealer and folded film. The solution is manually positioned amongst the two levels of film and once again manually put into the sealer. The seal is finished and the pack positioned on the tunnel conveyor. This is a ongoing method that also generates an component of scrap film.