Key Takeaways
Electronic products are packaged by shrink wrapping the printed carton the device already sits in, rather than the device itself. The film is sealed around the box and passed through a heat tunnel, which pulls it tight and leaves a clear, tamper-evident pack that keeps dust and moisture out and holds accessories together as one unit. Boxed items run on an L-bar sealer with a shrink tunnel; long items such as cables and light fittings suit a side bar sealer. Polyolefin is the standard film. Compare the four machines on the shrink wrap machines page.
Four machines wrap electronics: L-bar sealer, side bar sealer, sleeve sealer and standalone shrink tunnel. Compare them and see them running.
Shrink wrap is used on electronic products because it seals the retail box against dust, condensation and handling damage at a lower cost than rigid packaging. Moisture is one of the biggest threats to electronic components, and a sealed film layer keeps it away from the carton and its contents. A tight film also makes tampering obvious, which matters on high-value items such as tablets, cameras, gaming devices and accessories, and it stops boxes rubbing against each other in storage and transit. Because the film takes the shape of whatever it wraps, the same machine handles a USB drive and a large audio unit, and clear film keeps the branding and the product visible on the shelf.
Polyolefin is the film that suits most electronic products. It is clear, durable and shrinks at temperatures that are safe around heat-sensitive goods, which makes it the standard choice for retail packs. Polyethylene is thicker and stronger, and is used for bundling or protecting larger items in transit rather than for shelf presentation. PVC is the budget option and is generally kept for lightweight, low-value packs rather than sensitive electronics. The film you choose sets the tunnel temperature and the belt speed, so it is worth settling before the machine is specified.
For boxed electronics an L-bar sealer with a shrink tunnel is the usual machine. It seals and trims two sides of the pack in one stroke, which suits cartons of a consistent size and a moderate run rate. Long or awkward items such as cables, chargers on card and light fittings suit a side bar sealer, which seals continuously down one side of the film so pack length is not limited by a sealing frame. Both are supplied as manual, semi-automatic or automatic machines, so the volume you run decides how much of the cycle the operator does. What decides the specification is the product type, the pack size, the volume per hour, the film and the level of automation you want.
Shrink wrap protects electronics in transit by holding the pack together through every handling point between the factory and the customer. A shipment passes through warehouses, trucks, cargo containers, distribution centres and a final delivery, and at each one the box is lifted, stacked and moved. Sealed film keeps the carton closed, stops accessories separating from the product, sheds dust and damp, and adds rigidity to the box itself. With more electronics sold online and shipped as single parcels rather than palletised retail loads, that protection matters at the individual pack level, which is why consistent machine sealing has replaced hand wrapping in most operations.
Electronic products are shrink wrapped over the printed carton, in polyolefin film, on an L-bar sealer for boxes or a side bar sealer for cables and long items. Send us the pack size, the volume per hour and whether you want a manual, semi-automatic or automatic machine, and we will specify the machine to suit. Compare all four machines on the shrink wrap machines page, or go straight to the L-bar sealer and shrink wrap machine, which is the one most often supplied for boxed retail packs.
No. A shrink tunnel applies controlled heat for a few seconds to shrink the film, and the pack passes through on a belt rather than sitting in the heat. Polyolefin shrinks at a low enough temperature to be used around heat-sensitive goods, and the film is normally wrapped over the carton rather than the device itself.
It reduces the risk. Sealing the pack keeps moisture and airborne contaminants away from the carton and its contents, which is the main cause of corrosion on exposed metal parts during storage and shipping. It is a barrier, not a desiccant, so long-term storage in humid conditions still needs the usual precautions inside the box.
Polyolefin film is recyclable and uses less material than rigid packaging for the same protection, which is one reason it is the common choice for retail electronics packs.
Send us the product, the carton size and the volume you need per hour, and we will specify the shrink wrap machine that suits it, with installation by our own technicians, a one-year warranty, CE marking on request and spares held in Johannesburg. You can also send a sample and we will trial-wrap it at our Johannesburg showroom before you buy.
