Barrier film refers to a kind of film material possessing the functions of thermal insulation, waterproofing, and moisture resistance. Typically, it features a multi-layer structure that is fabricated by extruding a material with robust gas barrier properties along with a polyolefin which exhibits strong heat-sealing and moisture barrier capabilities. The principal functions of barrier films are to isolate water vapor and oxygen, thereby preventing damage to materials and equipment induced by these elements and, consequently, prolonging their service life.
Barrier films find extensive applications across numerous fields, such as construction, electronics, and packaging. In the construction industry, they are utilized for thermal insulation of roofs and exterior walls. In the electronics sector, particularly in the flexible packaging of OLEDs (Organic Light-Emitting Diodes), QLEDs (Quantum Dot Light-Emitting Diodes), electronic devices, and solar cells, barrier films play a pivotal role in safeguarding internal materials from damage caused by water vapor and oxygen. In the packaging field, they are employed to protect food products and other items that are prone to moisture absorption or oxidation.