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[Article]The following message about pallet was posted by QingDao LongYouRu packing Co., Ltd Cindy Feng
07/28/2020
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What Is Pallet Stretch Film

Stretch wrap or stretch film is a highly stretchable plastic film that is wrapped around items. The elastic recovery keeps the items tightly bound. In contrast, shrink wrap is applied loosely around an item and shrinks tightly with heat.

It is frequently used to unitize pallet loads but also may be used for bundling smaller items. Types of stretch film include bundling stretch film, hand stretch film, extended core stretch film, machine stretch film and static dissipative film.

Materials
The most common stretch wrap material linear low-density polyethylene or LLDPE, which is produced by copolymerization of ethylene with alpha-olefins, the most common of which are butene, hexene and octene. The use of higher alpha-olefins (hexene or octene) gives rise to enhanced stretch film characteristics, particularly in respect of elongation at break and puncture resistance. Other types of polyethylene and PVC can also be used. Many films have about 500% stretch at break but are only stretched to about 100 – 300% in use. Once stretched, the elastic recovery is used to keep the load tight.

There are two methods of producing stretch wrap. 1) Blown: the resin is melted and extruded through an annular die, it is air-cooled. This is a slower process but provides for higher quality in all the areas listed below. The cost of production is also higher due to the quantity that can be produced per hour. 2) Cast: the film is extruded through a slot die, then passed over cooling rollers. This makes the cooling process quick. The quality is not as good as blown but more can be produced in an hour with lower costs.

Other properties such as break strength, cling, clarity, tear resistance, static discharge, etc. are also important.


QingDao LongYouRu packing Co., Ltd
Jiaolai Industrial Park, Jiaolai Town Jiaozhou Qingdao, Shandong
18563727557
18563727557
sdxingfei@gmail.com
   
Last modified: 2020-07-28 10:34:17
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    Mobile: 18563727557
    Company: QingDao LongYouRu packing Co., Ltd
    Telephone: 18563727557
    Address: Jiaolai Industrial Park, Jiaolai Town Jiaozhou Qingdao, Shandong
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