PEF Shrink Film Application Guide: Optimizing Temperature, Sealing, and Speed

The market offers various types of Shrink Films, including PVC, POF, PEF, cross-linked films, PET, and PETG. Each material has distinct chemical and physical properties, requiring flexible parameter adjustments on packaging machines. While traditional materials like PVC and POF are well understood, as a new mono material packaging solution,PEF Shrink Film has limited online guidance. This article will focus on analyzing the key points of using Pef Shrink Film to help users better apply this efficient and sustainability packaging material.

PEF shrink film is suitable for most automatic and semi-automatic packaging machines, similar to POF and cross-linked films. When using PEF for product packaging, we still need to pay close attention to the following critical factors:

Shrink Temperature

PEF shrink film, made of a mono polyethylene material, excels in low-temperature resistance. Therefore, it remains stable and shrinks effectively at relatively lower temperatures. While common POF typically requires 145–160°C, this range is too high for PEF and can easily cause fogging on the film surface, compromising packaging quality. For optimal results, the recommended shrinkage temperature for PEF is 135–145°C, though slight adjustments may be needed based on packaging machine performance.

Sealing Temperature

The hot knife temperature refers to the temperature at which the heat sealing knife on the packaging machine seals the bag. If too low, the seal may be weak or stick to the blade; if too high, the sealing line may be burned. For POF films, 200–220°C is typical, but PEF’s higher tackiness demands a balanced approach. when using PEF film for shrink packaging, it is recommended to set the Sealer between 205–210°C to ensure clean cuts and durable seals without damage.

Additional Adjustments
In addition, the number of perforation and the speed of the shrink oven need to be adjusted according to the actual size and shrinkage of the product. For example, by reducing the number of vents and slowing down the shrink furnace speed, the packaging film can have enough time to fully expand in the heat tunnel, thereby achieving a close-fitting shrinkage effect.

As an innovative mono material packaging solution, PEF Shrink Film offers significant potential. To achieve the best results, focus on optimizing:

✔ Shrink temperature (135–145°C)
✔ Sealer temperature (205–210°C)
✔ Perforation count and conveyor speed

By adjusting these parameters, users can ensure high-quality, sustainable packaging with PEF shrink film.