Sleeve Wrapping Machines
The item or group of items is wrapped with one or two reels of film, then sent through a heat-shrink tunnel. If two reels are used, they form a web, which the product is passed through before the end is severed and sealed. Low-density polypropylene is the most common film choice, usually in a thickness between 30 microns up to 120 microns. This method usually involves holes in the material at the end, called bull’s eyes or bullet holes. Because of this, sleeve wrapping is usually used for transit or distribution type products. Although quality lacks, air flow can be used to fully seal a product inside the packaging. The most common models feature 600mm to 1500mm in sealing jaw width. That means products of that size and smaller are best for this approach. Length is much more flexible due to the film being on a roll. The loading method and heat-shrink tunnel size are more likely to determine length limits. Manual models can produce one to two packs per minute. More advanced models can achieve 35 or so packs per minute.
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