PE breathable lamination film is a multi-layer structure that uses an adhesive system to combine substrates and polyethylene (PE) films (single layer or co-extrusion). It is two or more materials that are compounded once or more times. process and combined together to form a composite material with certain functions.

The "composite" in the industry actually means "lamination", which means that films of different properties are glued together in a certain way, and then sealed to protect the contents. Among them, the composite film is mainly made of polyethylene (PE), also known as PE composite film.

Generally, PE breathable lamination film manufacturers commonly use lamination processing methods: extrusion lamination; wet lamination; solvent-based dry lamination; solvent-free dry lamination.

The extrusion composite process is to use molten resin (polyethylene, polypropylene, EVA, ion resin, etc.) as an adhesive or a heat-sealing layer, apply it to various films for compounding, and then cool and solidify. The process is called extrusion lamination if a second substrate is used, or extrusion coating if no second substrate is used.

The wet lamination process uses a water-soluble adhesive, which is characterized by lamination first and then drying. At the moment when the two substrates are bonded together, the adhesive layer coated on the adhesive substrate still contains a considerable amount of solvent. Therefore, the wet lamination process is usually used for the lamination processing between paper and other substrates, and is widely used in paper/aluminum two-layer composite products of tobacco packaging and candy.

Both the solvent-based dry lamination process and the solvent-free dry lamination process have something in common: at the moment when the two substrates are bonded together, there is no solvent or thinner in the adhesive layer coated on the adhesive substrate. Therefore, the two processes are collectively referred to as the dry composite process. But they are different again between the two: the adhesive used by the former or being commonly called as glue contains solvent, and the adhesive used by the latter or glue do not contain solvent. Therefore, on the solvent-type dry-process compound machine, the drying box is an essential component, but there is no drying box on the solvent-free dry-process compound machine.

Zhejiang Hengyao New Material Co., Ltd. is a professional PE breathable film manufacturers. If you need it, you can click the official website to contact us. We would like to answer more information for you.

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