Although this film is produced in various thicknesses and widths, the most important feature for its classification is the raw materials used. In the following, we introduce these materials and the advantages and disadvantages of each.

1- PVC shrink

PVC stands for Polyvinyl Chloride and is the third most produced plastic in the world. Before the invention of polyolefin, this plastic was common for packaging bottles and small cans and non-food items. The most important problem with this material is the inadequate sealing strength. PVC becomes hard in cold weather and soft in hot weather, so it does not have proper strength. On the other hand, it releases small amounts of hydrogen chloride gas in the air and carbon deposits in the shiring device, which will be dangerous for the people present if your environment is not properly ventilated.

2- polyolefin shrink

POF film is an excellent alternative to PVC. This film is used for packaging consumer products such as bottles, food, toys and many other items. POF shrink is particularly popular due to its glossy appearance and high transparency, low production cost, and excellent formability. In addition, unlike PVC, which should not come into direct contact with food, polyolefin has FDA approval. Of course, the plastics produced from it are expensive, but they are more resistant to punctures, tears and temperature changes, and it is the best choice for packing several items at the same time.

3- Shrink polyethylene

PE shrink wrap is used in a wide range of industries and factories, from small packages to large and heavy items can be well packaged and shipped with it. Unlike PVC and polyolefin, which have a thickness limit, polyethylene shrink can be produced with greater thickness, and as a result, it can also be used for packaging heavy items. Also, polyethylene is harder and has more elasticity. All kinds of plastic covered packaging films are produced from polyethylene.