-Material characteristics of aluminum foil

 1. Basic composition: pure aluminum (Al≥99%) or aluminum alloy (such as 8011, 1235 grades), with trace amounts of iron and silicon added to enhance strength.

 2. Thickness range: 0.006mm~0.2mm (620μm is common for household use, and up to 200μm for industrial use).

-Core performance

 1. Barrier: 100% barrier to water vapor, oxygen, ultraviolet rays, mildew and moisture-proof.

 2. Thermal conductivity: reflects more than 80% of thermal radiation, suitable for fast and uniform heating.

 3. Flexibility: can be folded and shaped, but it is easy to break after repeated bending (annealing treatment is required to improve ductility).

 4. Temperature resistance: stable at 50℃~250℃ (thickened aluminum foil is recommended for high-temperature barbecue).

-Surface treatment

 1. Glossy and matte: Glossy surface has high heat/light reflection efficiency, and matte surface is more suitable for printing and lamination.

 2. Coating process: some aluminum foils are coated with PE/PET (such as Tetra Pak) to enhance sealing and acid and alkali resistance.

-Classification of aluminum foil                    

-Core uses of aluminum foil

1. Food industry (accounting for more than 60%)

Packaging and preservation: chocolate, dairy products (anti-oxidation), fast food boxes (anti-oil penetration).

Vacuum packaging: compounded with nylon (such as PA/AL/PE structure) to extend the shelf life of meat.

Cooking aid: Oven/grill: wrap ingredients to lock in moisture (such as grilled fish, sweet potatoes). Air fryer paper: anti-stick and uniform heat conduction.

2. Industrial field

Electronics and electrical appliances: Lithium battery electrode collector (thickness 815μm, high purity required). Cable shielding layer (anti-electromagnetic interference).

Building insulation: roof/pipe insulation materials (compounded with glass wool, reflecting thermal radiation).

3. Medical and daily chemicals

Pharmaceutical packaging: tablet blisters (PTP aluminum foil), moisture-proof and light-proof. Medical dressing backing (breathable and antibacterial).

Cosmetics: toothpaste tubes, skin care products sealing film (anti-deterioration).

4. Special applications

Aerospace: satellite insulation layer (multi-layer aluminum foil composite, resistant to extreme temperatures).

Art: hot stamping materials, decorative foil (embossed patterns).