In the early days, LLDPE stretched films were mostly blown films, and developed from single-layer to two-layer and three-layer; now, LLDPE stretched films are mainly produced by casting method. It has the advantages of uniformity and high transparency and can be applied to the requirements of high-magnification pre-stretching
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Unitization: This is one of the biggest features of stretch film packaging. With the film’s superior winding force and retractability.
Primary protection: The primary protection provides surface protection of the product, forming a very light and protective appearance around the product, so as to achieve the purpose of dustproof, oil-proof, moisture-proof, waterproof and anti-theft.
Compression fixation: The product is wrapped and packaged by the retraction force of the stretched film to form a compact unit that does not take up space as a whole so that the pallets of the product are tightly wrapped together, which can effectively prevent the product during transportation.
Cost saving: The use of wrapping film for product packaging can effectively reduce the cost of use. The use of wrapping film is only about 15% of the original box packaging, about 35% of the heat shrinkable film, and about 50% of the carton packaging. At the same time, it can reduce the labor intensity of workers, and improve the packaging efficiency and packaging grade.
Sealed package
This type of packaging is similar to shrink wrap, where the film wraps the tray around the tray, and then two heat grippers heat seal the film at both ends together. This is the earliest form of wrapping film, and more packaging forms have been developed from this
Full-width packaging
This kind of packaging requires that the film width is enough to cover the tray, and the shape of the tray is regular, so it is suitable for use with a film thickness of 17-35μm
Hand-packed
This kind of packaging is the simplest kind of wrapping film packaging, the film is loaded on a rack or by hand, and the film is rotated by the tray or the film is rotated around the tray. Mainly used for repackaging after the packaged pallet is damaged, and ordinary pallet packaging. This kind of packaging speed is slow, and the suitable film thickness is 15-20 μm;
Stretch film wrapping machine packaging
This is one of the most common and widespread forms of mechanical packaging. The tray rotates or the film rotates around the tray. The film is fixed on the support and can move up and down. This packing capacity is very large, about 15 to 18 trays per hour. The suitable film thickness is about 15-25μm;
Horizontal mechanical packaging
Different from another packaging, the film revolves around the item, which is suitable for the packaging of long goods, such as carpets, boards, fiberboards, special-shaped materials, etc.;
Packaging of paper tubes
It’s one of the newest uses for stretch wrap, and it’s better than old-fashioned paper tube wraps. The suitable film thickness is 30～120μm;
Packaging of small items
This is the latest packaging form of wrapping film, which can not only reduce material consumption but also reduce the storage space of pallets. In foreign countries, this kind of packaging was first introduced in 1984. Just one year later, many such packaging appeared on the market. This packaging format has huge potential. Suitable for the film thickness of 15 ~ 30μm;
Packaging of tubes and cables
This is an example of the application of stretch film in a special field. The packaging equipment is installed at the end of the production line, and the fully automatic stretch film can not only replace the tape to bind the material, but also play a protective role. The applicable thickness is 15 to 30 μm.