8021 Aluminum Foil

8021 aluminum foil is mainly made from aluminum, iron, and silicon alloys. The addition of these alloy elements enhances the strength and flexibility of the aluminum foil.

8021 aluminum foil offers excellent barrier properties, heat resistance, and flexibility, with a smooth and uniform surface and minimal pinholes. It is particularly suitable for a variety of packaging needs.

• Thickness Range: 6μm to 200μm.
• Manufacturing Process: Made from high-purity aluminum base foil through rolling to produce thinner aluminum foil (below 200μm).
• Processing Performance: 8021 Aluminum Foil is easy to process, with high tensile strength and good elongation.
• Barrier Performance: 8021 aluminum foil provides excellent moisture, light, and barrier properties, with a particularly notable effect on water vapor resistance.
• Safety: Non-toxic and odorless, safe and hygienic, suitable for packaging materials, widely used after lamination, printing, and coating.

8021 Aluminum Foil Temper

• H14
• H18
• H22
• H24

8021 Aluminum Foil Surface Finish

• Color
• Anodized
• pvc coated

Color:Red, white, black, blue, green etc

Features of 8021 Aluminum Foil

1. Cost-Effectiveness

Reduced Costs: With minimal pinholes, 8021 aluminum foil performs excellently in applications requiring high barrier properties, such as pharmaceutical packaging, electronic product packaging, and cooking packaging, thus helping to lower overall costs.

2. Improved Product Quality

Excellent Elongation: Enhances the quality of challenging molded products such as gusseted bags, stand-up pouches, and laminated tubes, ensuring stability and reliability during use.

3. Increased Lamination Productivity

High Tensile Strength: Prevents tearing during the lamination process, significantly improving production efficiency.

4. Uniform and Smooth Surface

Even and Smooth Surface: A smoother and more uniform matte surface enhances product appearance, making it suitable for labels and other external packaging.

5. Mechanical Performance

8021 Aluminum Foil has strong puncture and tear resistance.

6. Corrosion Resistance

Good Corrosion Resistance: Resists corrosion from various chemicals, extending the product's service life.

7. Hygienic Safety

Compliance with Hygiene Standards: 8021 Aluminum Foil meets international hygiene standards and food safety requirements, ensuring safety.

8. Price and Durability

Cost-Effective: 8021 aluminum foil is economical, durable, non-toxic, and oil-resistant.

9. Chemical and Electrical Performance

Chemical Resistance: Provides excellent electrical and non-magnetic shielding.

10. Deep Draw Performance

8021 aluminum offers good deep draw performance, resistance to electrolyte corrosion, and high heat seal strength.

8011 Aluminum Foil Standards

• ASTM B479
• QQA-1876

Advantages of 8021 Aluminum Foil

• 1. Safe and Non-Toxic: 8021 aluminum foil meets Grade A water brush standards, with high cup convexity, is safe and non-toxic, suitable for direct contact with food, and poses no health risks.
• 2. Excellent Moisture and Light Barrier Properties: With outstanding barrier performance, it effectively prevents the intrusion of moisture, oxygen, and other contaminants, maintaining the freshness of contents. Its opaque nature makes it especially suitable for packaging light-sensitive products.
• 3. Clean Surface: The surface is smooth and even, free from spots, oil stains, or voids, making it easy to process and use, ensuring packaging quality.
• 4. High Mechanical Performance: It has higher hardness and tensile strength. Although its tear strength is lower, it demonstrates good flexibility in handling and application, making it resistant to cracking or breaking.
• 5. Strong Heat Resistance: It can withstand temperatures up to 300°C without melting or deforming, suitable for high-temperature applications.
• 6. Excellent Compatibility: Compatible with various materials, including plastics, paper, and other metals, it easily integrates with other packaging materials to meet diverse packaging needs.
• 7. Hygiene Testing: Passed tests for bacteria, mold, etc., with heavy metal content not exceeding 0.25 ppm, strictly adhering to industry standards to ensure packaging safety and health.
• 8. Good Processability: 8021 aluminum foil has high flexibility, making it easy to bend, fold, and shape, suitable for packaging products of various shapes and sizes.

8021 household insulation or heat insulation aluminum foil is a typical product of household-grade aluminum alloy used for household food packaging.

8021 aluminum foil alloy is widely used as packaging material after lamination, printing, gluing and other processes.

8021 Alloy Aluminum Foil Mechanical Behavior

• 1. Strength: 8021 aluminum foil has good strength and can maintain stable mechanical properties during processing and use.
• 2. Ductility: It has good ductility and can be easily folded, cut, formed and sealed.
• 3. Processability: It is easy to process and form, suitable for various processing technologies such as stamping, stretching, etc.

8021 Alloy Aluminum Foil Specifications

Haomei Supplied 8021 Aluminum Foil Forms

8021 Aluminum Foil Stock List

8021 Aluminum Foil Chemical composition

Mechanical Properties of Aluminium Foil Alloy 8021

8021 aluminum foil physical properties

Density: 2.71 g/cm³. Melting point: about 660°C. Linear expansion coefficient: 23.1 μm/m °C (20-100 °C). Thermal conductivity: 125-150 W/m·K.

8021 Aluminum Foil Applications

Pharmaceutical 8021-O Aluminum Foil

• Application: 8021 Aluminum Foil is widely used in cold-forming blister foil, PTP blister foil, and tropical blister foil to ensure drug stability and shelf life.
• Characteristics: 8021-O pharmaceutical aluminum foil is thicker than 8011 foil; 8011 foil is usually less than 0.05 mm thick, while 8021 alloy is thicker than 0.05 mm.

Food Packaging 8021 Aluminum Foil

• Application: Due to its cleanliness and compatibility with other packaging materials, 8021 aluminum foil is used as a raw material in the aluminum-based food packaging industry.
• Characteristics: 8021 aluminum foil is hygienic, non-toxic, and does not support bacterial or microbial growth, making it safe for direct contact with food and posing no health hazards.

Lithium Battery Soft Packaging 8021 Aluminum Foil

• Use: Part of the aluminum-plastic composite film used in soft-pack lithium batteries, including outer nylon layers, adhesives, intermediate aluminum foil layers, adhesives, and inner heat-seal layers.
• Characteristics: 8021 aluminum foil has a clean, smooth surface, free from oil stains, with good adhesion and lamination properties, not easy to delaminate or fall off, and has strong resistance to punching and piercing.

8021 Aluminum Foil Application Specification Parameter Table

Limitations of 8021 Aluminum Foil

1. Weak Corrosion Resistance in Acidic or Alkaline Environments

8021 aluminum foil has certain limitations in corrosion resistance. Especially in acidic or alkaline environments, its corrosion resistance is poor. Prolonged exposure to these environments may cause the foil to corrode, which can significantly affect its barrier performance. Corrosion not only reduces the foil’s protective properties but may also damage the quality of the contents and shorten the lifespan of the packaging material. Therefore, this should be considered when designing packaging solutions, and 8021 aluminum foil should be avoided in strong acid or strong alkaline environments.

2. Lower Strength

Compared to other aluminum alloys such as 8011 or 8079, 8021 aluminum foil has lower strength. This lack of strength may limit its use in applications that require high tensile strength or puncture resistance. For example, in applications needing high mechanical strength, industrial use, or demanding environments, 8021 aluminum foil may not meet the requirements. Choosing a higher-strength aluminum alloy may be a better option to ensure the material’s durability and reliability in actual use.

Differences Between 8011 and 8021 Aluminum Foil

8011 aluminum foil has superior strength and corrosion resistance compared to 8021 aluminum foil. In terms of elongation and puncture resistance, 8021 aluminum foil performs better. 8011 aluminum foil is widely used, while 8021 aluminum foil is suited for specific high-demand applications.

Chemical Composition

• 8011 aluminum foil contains manganese (Mn) and magnesium (Mg), which enhance its strength and corrosion resistance.
• 8021 aluminum foil does not contain manganese or magnesium, making it inferior in strength and corrosion resistance compared to 8011 foil.

Strength and Performance

• 8011 aluminum foil has higher strength but lower elongation and puncture resistance compared to 8021 foil. This makes 8011 foil suitable for applications requiring higher strength, such as food packaging and cable foil.
• 8021 aluminum foil performs better in elongation and puncture resistance, making it suitable for use in blister packs for pharmaceuticals and blister aluminum and tropical aluminum with high sealing performance requirements.

Application Areas

• 8011 aluminum foil has a wide range of applications, including pharmaceutical packaging, food packaging, lunch box materials, tape foil, cable foil, milk cap materials, bottle cap materials, etc.
• 8021 aluminum foil is relatively more expensive and mainly used in high-demand applications, such as lithium battery soft-pack aluminum-plastic films and blister pharmaceutical packaging.

8021 Aluminum Foil FAQs

Additional Information About Aluminum Foil

What is the strongest aluminum foil?

The strongest aluminum foil is typically the extra-thick or heavy-duty aluminum foil, often around 0.02 inches (0.5 mm) thick, used in specialized applications.

How is 8021 aluminum alloy foil processed?

• Cold Rolling: Produces thin foils with consistent thickness and surface quality.
• Annealing: Enhances ductility and formability, making it easier to handle and shape.

What standards does 8021 aluminum alloy foil comply with?

8021 aluminum alloy foil typically complies with standards such as ASTM B373, which are standard specifications for aluminum foil used in flexible barriers, food contact, and other applications.

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