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<p>1. Full width package</p><p>This kind of package requires a film-wide cover tray, and the shape of the tray is regular, so it is suitable for use (thin and soft transparent sheet) with a thickness of 17 to 35 μm. Shenzhen stretched film usually uses MPE in combination with C4-LLDPE, but not all C4-LLDPE can be used with it, and should be selected. Machine <a href="https://www.kinttape.com/" rel="noopener noreferrer" target="_blank"><a href="https://www.kinttape.com/" target="_blank">stretch film</a></a> mostly uses C6 and C8 materials, which is easy to process and can meet various packaging requirements. Due to the low stretching ratio, manual packaging mostly uses C4 material.</p><p><br></p><p>2. Hand wrapped</p><p>This type of wrapping is the simplest of stretch-wrap film wrapping. The film is mounted on a rack or is held by hand and rotated by the tray or the film around the tray. The transparency of the film produced by the casting method of the stretched film manufacturer is high, so it will not be discussed here. As the number of C atoms in the comonomer of the material increases, the branch length increases, the crystallinity decreases, and the "coiling or kinking" effect of the resulting copolymer increases, so the elongation increases, and the puncture strength and tear strength also increase. It is mainly used for re-wrapping of wrapped pallets after damage, and ordinary pallet wrapping. This kind of wrapping speed is slow, and the suitable film (thin and soft transparent sheet) has a thickness of 15-20 μm.</p><p><br></p><p>3. Seal package</p><p>This kind of wrapping is similar to shrink film wrapping. The film wraps the tray completely around the tray, and then two heat grabs heat seal the film at both ends together. This is the earliest use method of stretch-wrap film, and thus more wrapping methods have been developed.</p><p><br></p><p>4. Wrapped by stretch film winding machine</p><p>This is the most common and extensive mechanical packaging method. It is rotated by a tray or a film around the tray. The film (thin and soft transparent sheet) is fixed on a bracket and can be moved up and down. . This kind of package capacity is very large, about 15-18 trays per hour. The suitable film thickness is about 15-25 μm.</p><p><br></p><p>5. Horizontal machinery (machinery) package</p><p>Unlike other packages, the film is turned around the item and is suitable for long cargo packages, such as carpet, board, fiber (Fiber) board, and shaped materials. 6. Paper tube package</p><p>This is one of the latest uses of stretch-wrap film, which is better than old-fashioned paper tube wrapping with wrapping film. A suitable film thickness is 30 to 120 μm.</p><p><br></p><p>7. Packages for small items</p><p>This is the latest wrapping method of stretch film, which can not only reduce the consumption of material (Material), but also reduce the storage space (Space) of the tray. In foreign countries, this kind of wrapping was first introduced in 1984, just one year later There are many such packages on the market, and this package method has great potential (referring to the possibility of personal ability development). The good adhesion of the stretch film wholesale makes the packaging film layer and the layer on the outside of the goods stick together to make the goods firm. There are two main ways to obtain the viscosity: one is to add PIB or its masterbatch to the polymer; the other It is blended with VLDPE. PIB is a translucent viscous liquid. Direct addition requires special equipment or transformation of equipment. Generally, PIB masterbatch is used. Suitable for film thickness 15～30μm.</p><p><br></p><p>8. Package of pipes and cables</p><p>This is an example of the application of stretch film in a special domain (domain). The wrapping equipment (shèbèi) is installed (ān zhuāng) at the end of the production line. The fully automatic stretch film can replace the strap. Material (Material), and can play a protective role (role). The applicable thickness is 15～30μm.</p>
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