Aluminum plastic composite film is a multi‑layer flexible packaging material that combines the barrier performance of aluminum foil with the mechanical strength and processability of plastic films. It is typically produced by laminating or co‑extruding layers such as polyethylene (PE), polypropylene (PP), polyester (PET), or nylon (PA) with an aluminum layer. Each layer plays a specific role: the plastic provides toughness, heat sealability, and printability, while the aluminum offers outstanding barrier protection against oxygen, moisture, light, and odors.This material is widely used in food packaging, pharmaceutical packaging, daily chemical products, and industrial applications. In food packaging, aluminum plastic composite film helps extend shelf life by preventing oxidation, moisture ingress, and aroma loss. Typical products include coffee, tea, snacks, condiments, dairy powders, and ready‑to‑eat meals. For pharmaceuticals, it is often used for blister packs, strip packs, and pouch packaging, protecting sensitive drugs and medical devices from humidity, oxygen, and UV radiation. In daily chemical and cosmetic fields, it is used for packaging creams, gels, shampoos, facial masks, and cleaning agents, offering both an attractive appearance and reliable protection.Key properties of aluminum plastic composite film include excellent barrier performance, high mechanical strength, good puncture resistance, and stable dimensional properties. It can be designed with different structures, such as PET/Al/PE, PET/Al/CPP, or PA/Al/PE, depending on the requirements for heat resistance, stiffness, flexibility, and sealing temperature. The surface layer is often chosen for its printability and abrasion resistance, the middle aluminum layer for barrier function, and the inner layer for heat sealing and product compatibility. The film can be transparent on one side or fully opaque, according to marketing and protection needs.Processing methods for aluminum plastic composite film include dry lamination, extrusion lamination, and adhesive lamination. The choice of adhesive and process conditions affects bond strength, aroma retention, and safety. The film can be converted into pouches, sachets, lids, or lidding films through slitting, printing, bag‑making, and thermoforming. It is compatible with common printing technologies such as gravure, flexographic, and digital printing, enabling high‑quality graphics and branding.In addition to traditional structures, there is growing interest in sustainability. Some designs aim to reduce aluminum thickness while maintaining barrier performance, or to combine recyclable plastic substrates with ultra‑thin aluminum layers. Research is also focusing on optimizing recyclability and reducing environmental impact, while preserving product protection and shelf life.Overall, aluminum plastic composite film is a versatile packaging solution that offers a balance of protection, appearance, and process efficiency. By selecting suitable material combinations and structures, it can meet diverse requirements across food, pharmaceutical, cosmetic, and industrial markets, enhancing product stability and consumer convenience.