Stretch film is applied by hand hand film or by equipment machine film. Hand film is usually smaller in width so that a person can manually hold the roll and wrap the stretch around the pallet. Hand film can come pre-stretched, which means the wrap has already been stretched to capacity as it sits on the roll. The user would not need to stretch it any further to wrap the pallet.
Although this requires less output from the person applying the stretch film to the pallet, it also means that there is less film per roll, and it cannot contain as much as conventional, un-stretched wrap. Machine film usually runs in a larger width to fit a machine wrapper, which can automatically wrap various pallet loads and sizes in a fraction of the time as a manual application. These differences make a big impact on the usability and price of the film. Cast film is essentially a less expensive and more modern way to produce stretch film, although blown film has a variety of uses still today.
Cast is perfectly clear, stretches easily, and does not stick to the hands. However, it can break easily if over-stretched, and does not shrink back to size as easily after stretching. Blown, on the other hand, is not crystal clear and is tacky to the touch, but it has a higher holding power and a greater resistance to tearing or breaking than cast. While shrink wrap is generally more often used for displaying your product, to contain products in the retail, food and pharmaceuticals businesses to protect goods for sale.
You may have well already seen goods pilled high in supermarkets, and items wrapped in boxes on pallets. Shrink wrap film is made from a kind of plastic known as a polyolefin — the most common forms of which are Polythene and PVC. When heat shrunk over goods and pallets, it provides a puncture proof and secure way to hold items together for storage and transport and is an ideal way to package things.
Continuous shrink wrap rolls are ideal for wrapping outsized and irregular loads. For pallet loads, the ideal way to deploy the wrap is from a roll that offer a continuous sheet of shrink wrap material that can be wrapped around as many times as needed and round all sorts of irregularly shaped or tall pallet loads. It is also available in extra wide for really big loads. Shrink wrap roll with perforations. For more standardised loads, shrink pallet covers on a perforated roll can be torn off, slipped over the load and then heated and shrunk into place.
For best results raise the pallet to a position where you have easy access to the underside — then pull the cover down underneath the corners of the pallet. These are made from micron low density polythene and come in range of sizes. So how do you actually apply the shrink wrap? A shrink wrap machine can be used to both wrap and shrink smaller items.
These are ideal for retail products as the clear wrap displays items professionally, and is highly secure and tamper-proof as the film takes the shape of the product. For larger loads, the equipment needed to do the wrapping involves specialist machines that can spin the pallet and wrap the goods and heating equipment to do the heat shrink. Once wrapped, the packages need to be heated to shrink the wrap.
This is done using heat guns. These come in a range of sizes and shapes to suit all budgets and work by burning butane to produces ambient heat. This shrinks the wrap but is gentle enough not to over heat the products therein. Once applied it then tries to pull itself back into its original dimensions, tightly gripping the products.
There are several kinds of stretch film. Protection — If you are looking for a way to protect your goods from all possible elements, shrink wrap is the way to go as it will suck out all the air, and leave your goods completely protected from all elements. Damage — With the help of shrink wrapping, you can easily transport or store your goods in a secure manner. Breathable — Shrink wrap has the ability to offer ventilation, which can help reduce damage caused by moisture. Palletized Boxes — One of the most common uses of stretch wrapping is to cover palletized boxes.
Here pallet stretch film wraps around a number of boxes that have been set in the same pallet. This helps create the perfect size and keeps them secure. Buckets — Buckets filled with liquids such as paint, oil, or dry goods are wrapped using a heavy stretch wrap. This ties them together and creates a secure body, and reliable package. Wire Reels — Stretch wrap is used to keeping wires wrapped around perfectly, so you do not end up in a huge mess of wires as untangling thousands of meters of wire is near to impossible.
Electronics — Electronics might be lighter in weight than many products, but they need protection just the same. With the help of high-performance stretch film, you can easily protect your electronics.
Securing — While shrinking wrap might not be used in the same way, but they are at times used to help secure a box or a number of boxes.
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