Views: 0 Author: Site Editor Publish Time: 2026-10-10 Origin: Site
Aluminum foil PET composite film is a high-performance laminated material composed of polyethylene terephthalate (PET) film and pure aluminum foil through professional lamination technology. It perfectly integrates the excellent mechanical properties of PET and the superior barrier characteristics of aluminum foil, making up for the single performance defects of individual materials. With stable physical and chemical properties, this composite film has become one of the most widely used functional packaging and industrial materials in food, pharmaceutical, construction and electronic industries, meeting the stringent protection and environmental adaptation requirements of various high-value products.
The most prominent advantage of aluminum foil PET composite film is its near-perfect barrier capability. The dense aluminum foil layer can effectively block oxygen, water vapor, ultraviolet light and external dust, with an oxygen transmission rate (OTR) as low as 0.02–0.05 cc/㎡·day and a water vapor transmission rate (WVTR) below 0.3 g/㎡·24h. This excellent barrier effect completely isolates air and moisture erosion, effectively preventing product oxidation, mildew, deliquescence and flavor loss. It can extend the shelf life of packaged products significantly, realizing a 24-month stable storage cycle for high-end products such as infant formula.
This composite film features a wide temperature adaptation range from -40℃ to 200℃, with stable physical properties in both extreme low and high temperature environments. It will not crack, deform or lose barrier performance under low-temperature freezing conditions, and can withstand high-temperature heat sealing and short-term high-temperature sterilization. This unique temperature resistance enables it to adapt to diverse processing and storage scenarios, from cold chain transportation of food and medicines to high-temperature packaging processing of industrial products.
PET substrate endows the composite film with high tensile strength, good toughness and puncture resistance, solving the defect that pure aluminum foil is easy to tear and deform. The integrated lamination structure ensures tight bonding between layers, no delamination or cracking during folding, stretching and daily use. Compared with traditional single-layer packaging materials, it reduces the overall thickness by about 15% while maintaining structural stability, achieving lightweight and durable dual effects.
Adopting food-grade and industrial-grade raw materials and environmentally friendly lamination processes, the aluminum foil PET composite film is non-toxic, odorless and chemically inert. It does not react with acidic, alkaline or oily substances, and will not precipitate harmful substances. It meets international food safety and pharmaceutical packaging standards such as CE, BV and ISO, ensuring safe contact with food, medicines and human body-related products. In addition, it has good corrosion resistance and can adapt to humid and corrosive industrial environments.
The aluminum foil layer has excellent radiant heat reflection performance, which can reflect most of the infrared and solar radiant heat. It effectively reduces heat conduction and heat exchange, providing reliable thermal insulation, heat preservation and cold preservation effects. At the same time, it completely blocks light transmission, avoiding product deterioration and performance attenuation caused by long-term light exposure, which is especially suitable for light-sensitive product protection.
It is the mainstream packaging material for high-grade and shelf-life-sensitive food products. It is widely used in vacuum packaging and nitrogen-filled packaging of snacks, seasonings, nuts, coffee powder, meal replacement powder and infant formula. Its excellent moisture-proof, oxygen-proof and fresh-keeping properties can lock food flavor, prevent oxidation and mildew, and greatly extend the shelf life of food. In addition, it is also used for packaging of high-end sauces, frozen food and baked goods, adapting to cold chain storage and daily commercial circulation scenarios.
Due to its high safety and superior barrier performance, the composite film is widely applied in pharmaceutical and medical product packaging. It is used for sealed packaging of pharmaceutical powders, granules, oral preparations, medical masks, disposable medical supplies and diagnostic reagents. It can effectively isolate external bacteria, moisture and pollutants, maintain the purity and efficacy stability of medical and pharmaceutical products, and meet the strict sterile storage requirements of the medical industry.
In the construction field, aluminum foil PET composite film serves as a professional thermal insulation and vapor barrier material. It is applied to building roof insulation, wall insulation systems and building envelope protection, reflecting radiant heat and reducing indoor and outdoor heat exchange to improve building energy efficiency. It is also commonly used in HVAC duct insulation, pipeline thermal insulation and waterproof moisture-proof engineering, preventing condensation and moisture erosion of insulation materials and prolonging the service life of building thermal insulation structures.
For moisture-sensitive and oxidation-prone industrial and electronic products, this composite film is an ideal anti-static and moisture-proof packaging material. It is used for vacuum packaging of precision electronic components, circuit boards, semiconductor devices, special resins and industrial adhesives, avoiding product failure caused by moisture absorption and oxidation. Meanwhile, its good puncture resistance and structural stability can protect precision parts from physical damage during transportation and storage.
It is suitable for packaging of light-sensitive and moisture-prone daily chemical products such as essential oils, skin care products, perfumes and cosmetic powders. The light-shielding and barrier properties can prevent active ingredients of cosmetics from being decomposed by light and oxidized by air, ensuring the stability and efficacy of daily chemical products. Its smooth and metallic appearance also improves the grade and aesthetic effect of product packaging.
Aluminum foil PET composite film combines the complementary advantages of PET and aluminum foil, covering ultra-high barrier performance, wide temperature resistance, mechanical durability, safety and environmental protection, and thermal insulation. Its comprehensive performance is far superior to traditional single-layer packaging materials. With irreplaceable functional advantages, it covers multiple fields such as food fresh-keeping, pharmaceutical protection, building energy conservation and industrial precision packaging. As the demand for high-quality, long-shelf-life and high-barrier materials continues to rise in various industries, aluminum foil PET composite film will have broader application prospects and market development space.
