aluminum foil film is a multi-layer flexible packaging material formed by laminating aluminum foil as the main barrier layer with plastic films (such as PET, PE, PA, etc.) using composite technology. It combines the advantages of both metal and plastic, possessing excellent barrier properties while maintaining a certain degree of flexibility and heat-sealing capability. The surface of this material is typically treated with corona discharge or coating to improve print adhesion and interlayer bonding. The thickness of the aluminum foil layer is usually between 6μm and 20μm, and the total thickness of the composite layer is usually between 60μm and 150μm, effectively blocking the intrusion of moisture, oxygen, light, and odors. Due to its good ductility, high temperature resistance, and moisture resistance, aluminum foil film has become a commonly used high-barrier packaging material, capable of maintaining the freshness, safety, and stability of the contents.

1. Superior Barrier Performance:

Aluminum Foil Film uses a pure aluminum foil layer as its core barrier, with an oxygen translucency (OTR) of less than 0.1 cm³/m²·24h and a water vapor translucency (WVTR) of less than 0.05 g/m²·24h, far superior to ordinary BOPP or PET films. It effectively prevents the penetration of oxygen, water vapor, ultraviolet light, and odors, preserving the original flavor and nutrients of food and significantly extending shelf life. Even under high humidity or high temperature conditions, its barrier performance remains stable over a long period, making it suitable for various long-term storage and transportation scenarios.

2. Excellent Heat-Sealing Performance:

Aluminum Foil Film uses low-density polyethylene (LDPE) or cast polypropylene (CPP) as its heat-sealing layer, achieving rapid and strong heat sealing within a temperature range of 110°C to 140°C. The seal strength is ≥40N/15mm, ensuring stable operation on high-speed automated packaging equipment. The heat-sealing layer combines excellent oil resistance and contamination resistance, ensuring a complete seal even with powder or grease residue, preventing leakage and bag bursting, and guaranteeing product storage safety.

3. High Mechanical Strength:

Through a PET/AL/PE or PA/AL/CPP structural design, the tensile strength reaches 70-90MPa, with an elongation at break exceeding 120%, exhibiting excellent tear and puncture resistance. It is not easily damaged or deformed during food filling, transportation, and packaging. The film surface is smooth and flat, with high thickness uniformity (error ≤ ±2μm), perfectly compatible with high-speed roll film packaging machines, improving production efficiency.

4. Excellent Printing Adaptability:

The outer PET or NY surface of the Aluminum Foil Film is corona-treated, with a surface tension ≥38dyn/cm, providing strong adhesion and suitable for gravure printing, composite inks, and matte lamination. It achieves high-resolution printing effects, with vibrant colors, clear layers, and resistance to fading. Its excellent printability provides more creative space for food packaging design, meeting the stringent visual presentation requirements of high-end brands.

5. Stability and Weather Resistance:

The aluminum foil layer exhibits excellent temperature and chemical stability, withstanding environmental temperature variations from -40°C to 120°C without deformation or delamination. The packaging structure remains stable regardless of freezing, heating, or high humidity environments. The product complies with FDA and EU food contact standards and can be tested by SGS and RoHS upon request, ensuring packaging safety and no migration. It also remains chemically inert to acidic, alkaline, and oily foods, without affecting the quality of the contents.

1. Snack Food Packaging:

Aluminum foil film is widely used for the outer packaging of snack foods such as potato chips, nuts, biscuits, candies, and dried fruits. Its extremely low oxygen permeability and moisture-proof properties effectively prevent oil oxidation and moisture absorption, keeping the food crisp and fresh. The inner heat-sealed layer allows for vacuum or nitrogen-filled packaging, further extending shelf life. The glossy aluminum surface also enhances the product's premium feel and improves shelf appeal.

2. Coffee and Tea Packaging:

For highly aromatic products such as coffee beans, ground coffee, tea leaves, and herbal teas, the complete oxygen barrier properties of aluminum foil film prevent the volatilization and oxidation of aromatic components, maintaining the original aroma. It often uses a PET/AL/PE structure with a one-way venting valve design, allowing the packaging to "breathe" without leaking air. Even after long-distance transportation, it remains dry and odorless, making it the preferred material for high-end coffee brands.

3. Dairy Products and Seasoning Packaging:

In food packaging for milk powder, cheese, sauces, and condiments, the high-temperature resistance and chemical resistance of aluminum foil film are particularly important. It can withstand boiling at 121°C for over 30 minutes without delamination or bubbling, making it suitable for high-temperature sterilization processes. It is also resistant to oils, acids, and alkalis, making it suitable for long-term sealed storage of oily or acidic substances, and is widely used in packaging bags for liquid condiments and powdered foods.

4. Pharmaceutical and Health Product Packaging:

The pharmaceutical field has even more stringent packaging requirements. This product can be used as the outer bag or blister pack backing material for tablets, granules, powders, plasters, ointments, etc. Its excellent light-proof, moisture-proof, and antibacterial properties protect the active ingredients from degradation. When laminated with a PA layer, it further improves puncture resistance and airtightness, making it suitable for vacuum sealing or nitrogen-filled packaging. It meets ISO and GMP standards and is an important material for pharmaceutical and health product packaging.