A Guide to Heat Shrink Film
Shrink Film – a cloth made up of polymer plastic film. When heat is applied, it shrinks tightly over whatever it is covering. There are a number of uses for Shrink wrap and shrink film. Some typical applications of shrink wrap are for wrapping meals, present baskets, boxes, toys, books, soaps, etc. Under is a breakdown of the two most commonly used types of shrink.
PVC Shrink Film – A type of shrink wrap used for a wide range of applications. The PVC stands for Polyvinyl chloride. Polyvinyl chloride is the third most-produced plastic within the world. PVC shrink wrap was probably the most commonly used shrink film until replaced several years ago by polyolefin (POF) shrink wrap.
Widespread Uses of PVC Shrink Film – PVC shrink wrap uses include packaging boxes, CD and DVD packaging, software, small canisters, and other non-edible items.
Drawbacks of PVC Shrink Film – Sealing Energy, storage points, and sealing by-products are widespread drawbacks of PVC Shrink Wrap. The plasticizer in PVC Shrink wrap hardens in cold conditions and softens under hot conditions, therefore compromising the energy of the seal and the plastic. PVC shrink wrap also releases small quantities of hydrogen chloride into the air and carbon deposits onto the sealer. Proper air flow is required when sealing PVC shrink wrap.
Polyolefin Shrink Film – A type of shrink wrap that has become the choosered alternative for packaging products, each edible and non-edible. Polyolefin Shrink wrap is choosered for a wide range of reasons, together with fewer odors when sealed, stronger seal, and more versatile storage. Polyolefin shrink films do not need any chlorine; due to this fact, they do not produce hydrogen chloride gas. Polyolefin shrink wrap doesn’t have any plasticizers, so the temperature is not an issue. Polyolefin can be stored in a wide range of temperatures and doesn’t harden and soften in different environments like PVC shrink film.
Common Uses of Polyolefin Shrink Film – Polyolefin shrink film is used for almost each kind of application. Applications embrace toys, sporting items, printed wrap, meals, stationery, and cards, just to name a few.
Drawbacks of Polyolefin Shrink Film – Value and machine compatibility are the two significant drawbacks of Polyolefin shrink film. Polyolefin is commonly more costly than PVC shrink wrap. Many packagers desire PVC because of this reason. There are types of polyolefin shrink wrap that are more suitable with machines, but Polyolefin machine compatibility has been a difficulty of packagers.
Cross-Linked Polyolefin Shrink Film – Irradiation is applied to standard polyolefin shrink film to make the film stronger, and capable of better seal strength. Cross-linked shrink film is sterile, and FDA approved for direct meals contact. It gives excellent clarity to display packaged products. To view intimately about making and the history of cross-linked shrink film view, our blog submit titled What is cross-linked shrink film.
Cross-linked shrink film additionally leaves less residue on sealers, promoting longer sealing blade or wire life. Cross-linked shrink film is made for use with high-speed machines and high output operations.
Frequent Uses of Cross-Linked Polyolefin Shrink Film – Cross-linked shrink film is used with the same products as standard polyolefin shrink film. The cross-linked film is commonly utilized in high output operations. It can also be used for heavier products; a conventional polyolefin shrink film cannot appropriately package.
Drawbacks of Cross-Linked Polyolefin Shrink Film – Cross-linked shrink film requires higher seal and shrink temps than an ordinary polyolefin shrink film. Higher temps can damage and deform products sensitive to heat. Higher seal and shrink temps. also, require higher energy costs.
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