When you choose shrink film, a heat sealer, and a shrink tunnel or heat gun capable of accommodating the largest product, you’ll be sure it will suitably wrap and package every smaller item, too.ĭepending on production levels, different sizes of plastic film can reduce waste and cost. For the most accurate measurements, we recommend finding the “length x width x height” of the largest product in the project. Proper measurements will help determine the size and form of shrink film to consider, the size of the sealer needed, and the size of the shrink tunnel or heat gun. Shrink wrap maintains its transparency despite shrinking, making it perfect for retail packaging projects where consumers need to view the product. This makes shrink wrap tough and durable to protect against tearing and piercing, keeping its contents safe and secure. As the film cools, the polymers once again set but in their new shape.Īs these polymers rearrange and reduce from their original straight, lengthened state, their tensile strength increases. The breaking down of these polymers causes the film to condense and shrink around its contents. However, when heat is applied to the film via a heat gun or heat tunnel, it causes the polymers to break their structure and move freely. When we see pre-heated shrink wrap, the polymers that form the product are rigid and structured. This process occurs due to the plastic polymers that form the shrink wrap material. The plastic film is wrapped around its contents before heat is applied when it shrinks in size and conforms perfectly to the shape of its contents. Shrink wrap plastic is typically bought in either a roll of film, in bags, or as tubing.
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