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PE coated paper is paper that has been coated with a thin layer of PE (polyethylene) film — a type of specially treated plastic.
Process & Advantages
The key technical indicators of PE coated paper include:
- Dry silicone coating weight – how much release agent is coated per square meter. Measuring this requires professional equipment, and the amount directly affects the release performance. Reliable manufacturers adjust release force through chemical formulations, without reducing the coating weight. This kind of know-how comes from years of technical expertise.
- Peel strength at room temperature – measured using standard testing methods, typically expressed as N/25mm (which can also be converted into grams).
- Aged peel strength – peel strength measured after aging, usually slightly higher than room temperature values.
Ordinary paper is made of wood fibers, which are highly absorbent — that’s why paper easily takes in moisture and gets damaged by humidity. With PE coated paper, the process is different: molten PE plastic is evenly applied to the paper surface using a coating machine. This forms a thin protective film that bonds firmly to the paper and doesn’t peel off easily.
What makes the process even better is that it doesn’t use heat-sealing chemicals or adhesives, making it environmentally friendly. During later stages of packaging, there’s no need for glue — the PE layer itself can be heat-sealed directly.
Key Features of PE Coated Paper
- Oil resistant
- Water resistant (to a certain degree)
- Heat-sealable
In short, PE coated paper is a composite material that combines the natural properties of paper with the protective qualities of plastic film, making it highly versatile for packaging and industrial use.