8079 Aluminum Foil
8079 aluminum foil is an aluminum alloy foil primarily composed of aluminum, with specific proportions of iron (Fe), silicon (Si), and other elements added. It features excellent comprehensive properties and is widely used in high-end packaging fields.
8079 aluminum foil is a high-performance material commonly applied in industries requiring outstanding barrier properties, flexibility, and formability. It is especially prevalent in food, pharmaceutical, and industrial packaging applications.
- Alloy Type: 8079 aluminum foil belongs to the 8xxx series of aluminum alloys.
- Common Tempers: Includes H14, H18, and other temper states.
- Thickness Range: From 10 micrometers to 200 micrometers.
- Main Components: Aluminum metal with a purity of up to 99.79%, containing small amounts of zinc, chromium, and other elements to enhance corrosion resistance and oxidation resistance.
8079 Aluminum Foil Specifications and Dimensions
Thickness Specifications
- Thick Foil: 0.1~0.2mm
- Single Zero Foil: 0.01~0.1mm
- Double Zero Foil: 0.005~0.009mm
Width and Length Specifications
Width Range: Standard width ranges from 100 to 1600mm, wider sizes can be provided.
Length Range: Usually supplied in coil form, length can be customized according to customer requirements, generally marked as "C" to indicate customized length.
Core Characteristics of 8079 Aluminum Foil
- High Strength and Good Ductility: 8079 aluminum foil is a high-strength foil product with good elongation and rolling properties. In soft-pack battery applications, its strength can reach 90-110 MPa, elongation 13%-18%, and Erichsen value 6.2-7.3mm.
- Excellent Barrier Properties: 8079 aluminum foil offers superior moisture resistance, gas barrier performance, and flavor retention, effectively protecting packaged contents. These features make it ideal for high-barrier applications.
- Stable Temperature Adaptability: 8079 aluminum foil maintains its shape under extreme temperature conditions, withstanding -73 to 371°C without expansion or deformation, making it suitable for a wide range of temperature applications.
- Good Surface Properties: With advanced production processes, the surface of 8079 aluminum foil is clean, flat, and oil-free, offering strong bonding performance during lamination, and is resistant to delamination.
- Excellent Workability: 8079 aluminum foil has good formability and puncture resistance, making it easy to process into complex shapes.
8079 Aluminum Foil Temper States and Their Characteristics
Common Temper States
8079 O Temper (Annealed Condition)
Characteristics: Fully annealed to the softest state, good plasticity and high elongation
Processability: Excellent deep drawing performance, suitable for complex forming processes
Application Scenarios: Mainly used in applications requiring deep drawing, such as battery soft packs, cold-formed pharmaceutical foil, etc.
8079 H18 Temper (Full Hard Condition)
Characteristics: High strength and hardness, but lower ductility
Processability: More difficult to process, suitable for simple forming or non-forming applications
Application Scenarios: Commonly used in situations requiring high hardness and strength, such as pharmaceutical foil and bottle cap materials
8079 H22, H24 Temper (Half Hard Condition)
Characteristics: Moderate strength and hardness, with certain ductility
Processability: Suitable for medium-level forming processes
Application Scenarios: Widely used in food packaging, tape foil, and other fields
Effect of Temper on Aluminum Foil Properties
Different temper conditions significantly affect the mechanical and processing properties of 8079 aluminum foil:
Strength and Hardness: As the temper changes from O to H18, the strength and hardness of the aluminum foil gradually increase, while the elongation decreases.
Processability: O temper foil offers the best deep drawing and ductility performance, suitable for complex forming; H18 temper foil has high hardness, suitable for simple punching or non-forming uses.
Application Selection: Applications requiring deep drawing typically choose O temper foil; applications requiring higher strength and hardness usually choose H18 temper foil.
Surface Treatment Methods of 8079 Aluminum Foil
Surface Cleaning Treatment
Surface cleaning is a critical step in the production of 8079 aluminum foil, directly affecting its subsequent processing and application performance:
Degreasing
Process Characteristics: Uses advanced online degreasing technology during rolling to ensure a clean surface
Application Effect: Effectively ensures surface cleanliness without affecting mechanical strength
Importance: Essential for subsequent lamination, printing, or coating applications
De-oiling Treatment
Applying Conditions: Hard foil requires de-oiling before printing, lamination, or coating
Treatment Methods: Typically uses chemical degreasing or solvent cleaning methods
Treatment Effect: Ensures an oil-free surface to enhance adhesion in subsequent processes
Surface Coating Treatments
To meet specific application requirements, 8079 aluminum foil surfaces can undergo various coating treatments:
Anti-Corrosion Coating
Coating Material: Typically organic resin or polymer materials
Application Scenarios: Used in environments requiring improved corrosion resistance
Treatment Effect: Effectively enhances the corrosion resistance and service life of the aluminum foil
Heat Seal Coating
Coating Material: Thermoplastic adhesives such as polyurethane or vinyl
Application Scenarios: Packaging applications requiring heat sealing, such as food and pharmaceutical packaging
Treatment Effect: Provides excellent heat seal performance to ensure sealing effectiveness
Impact of Surface Treatments on Performance
Different surface treatments significantly influence the performance of 8079 aluminum foil:
Surface Tension: Proper surface treatment can improve surface tension, generally required to be no less than 32 dynes
Adhesion: Good surface treatment enhances adhesion of coatings and printing inks
Barrier Performance: Certain surface treatments can further improve the barrier properties of aluminum foil
Barrier Properties of 8079 Aluminum Foil
| Performance Indicator | Feature | Test Method | Typical Value |
| Moisture Resistance | Extremely high moisture resistance | Water Vapor Transmission Rate (WVTR) | Premium foil should be < 0.5g/(m²·24h) |
| Gas Barrier | Excellent gas barrier properties | Oxygen Transmission Rate (OTR) | Typically < 0.5cm³/(m²·24h·0.1MPa) |
| Light Blocking | Excellent light-blocking performance | Light Transmission Test | Almost completely blocks light |
Haomei Aluminum 8079 Foil Quality Inspection
Finished product quality inspection is the final step to ensure compliance with standards and customer requirements:
Dimensional Accuracy Inspection
Thickness Measurement: Uses laser or eddy current thickness gauges according to ASTM B479 and GB/T 3198 standards
Thickness Tolerance: Typically controlled within ±5%
Width and Length: Ensures compliance with contract tolerances, especially edge uniformity after slitting
Performance Testing
Mechanical Properties: Tensile strength, elongation, Erichsen value, etc., tested according to GB/T 228.1 standards
Surface Quality: Pinholes, oil stains, and surface wettability tension tests
Barrier Properties: Water vapor transmission rate, oxygen transmission rate, microbiological barrier tests
Advantages of 8079 aluminum foil
Barrier Properties
- Excellent Barrier: 8079 aluminum foil effectively isolates air, moisture, and odors, ensuring long-term protection of the packaged items.
- Moisture and Odor Resistance: Provides extremely high moisture resistance and gas blocking, effectively protecting the contents from external factors.
- Antibacterial Performance: Passes bacterial and mold tests, showing excellent non-toxic, odorless, safe, and hygienic properties.
Temperature Stability
High and Low-Temperature Adaptability: 8079 aluminum foil maintains shape stability without shrinking or deforming in a temperature range of -73°C to 371°C.
Conductivity and Light Blocking
- Good Conductivity: 8079 aluminum foil has good electrical conductivity, suitable for applications requiring electrical shielding.
- Excellent Light Blocking: Effectively blocks light, protecting light-sensitive products.
Flexibility and Processability
High Flexibility: 8079 aluminum foil is highly flexible, easy to process and mold into various shapes, adapting to diverse packaging needs.
Safety
Non-toxic and Odorless: Ensures the safety of food and pharmaceuticals, meeting hygiene standards.
The price is slightly higher compared to other aluminum foil alloys, but its performance advantages make it very popular in high-end applications.
8079 Aluminum Foil Standards
- ASTM B479
- QQA-1876
8079 Aluminum Foil Surface Quality
- No black spots, lines, creases, wrinkles, etc.
- Surface quality: no air holes, no bulges, etc.
8079 Aluminum Foil Tolerance
Width tolerance: ±1.0mm
Thickness tolerance:
| Measurement Type | Tolerance |
| Spot measurement tolerance | ±6% |
| Average thickness tolerance (lot weight ≥3T) | ±5% |
| Average thickness tolerance (lot weight ≥10T) | ±4% |
8079 O Aluminum Foil Pinholes
| Alloy Temper | Thickness (mm) | Pinholes (per square meter) |
| 8079 O aluminum foil | 0.006 | Max 500 |
| 8079 O aluminum foil | 0.0063 | Max 400 |
| 8079 O aluminum foil | 0.0065 | Max 200 |
| 8079 O aluminum foil | 0.008 | Max 100 |
| 8079 O aluminum foil | 0.009 | Max 100 |
Aluminum Alloy 8079 Foil Chemical Properties
| Al | Reminder |
| Si | 0.50 - 0.30 |
| Fe | 0.70 – 1.3 |
| Cu | ≤ 0.10 |
| Zn | ≤ 0.10 |
| Other | ≤ 0.15 |
Mechanical Properties of 8079 Aluminum Alloy Foil
| Alloy Temper | Thickness (mm) | Tensile Strength (Mpa) | Elongation (%) |
| 8079 O aluminum foil | 0.006 | 50-100 | ≥1.0 |
| 8079 O aluminum foil | 0.0063 | 50-100 | ≥1.0 |
| 8079 O aluminum foil | 0.0065 | 50-100 | ≥1.0 |
| 8079 O aluminum foil | 0.008 | 50-100 | ≥1.0 |
| 8079 O aluminum foil | 0.009 | 60-100 | ≥1.5 |
| 8079 H18 aluminum foil | 0.035-0.2 | ≥160 | – |
| 8079 H19 aluminum foil | 0.035-0.2 | ≥170 | – |
| 8079 H22 aluminum foil | 0.035-0.04 | 90-150 | – |
| 8079 H22 aluminum foil | >0.04-0.09 | 90-150 | – |
| 8079 H22 aluminum foil | >0.09-0.14 | 90-150 | 5 |
| 8079 H22 aluminum foil | >0.14-0.2 | 90-150 | 6 |
| 8079 H24 aluminum foil | 0.035-0.04 | 120-170 | 2 |
| 8079 H24 aluminum foil | >0.04-0.09 | 120-170 | 3 |
| 8079 H24 aluminum foil | >0.09-0.14 | 120-170 | 4 |
| 8079 H24 aluminum foil | >0.14-0.2 | 120-170 | 5 |
Common Applications of 8079 Aluminum Foil with Corresponding Specifications and Tempers
8079 Aluminum Foil for Food Packaging
8079 aluminum foil is widely used in food packaging due to its excellent barrier properties and food-safe characteristics:
Typical Applications:
Food Packaging Foil: Used for packaging various foods such as meat, baked goods, candies, etc.
Foil Container Material: Used for making disposable food containers
Household Foil: Aluminum foil for home kitchen use
Common Specifications and Tempers:
Thickness: 0.01-0.2mm
Width: 300-1100mm
Temper: O, H24, H22, H18, etc.
Performance Requirements:
Food-grade safety standards, passing tests for bacteria, mold, etc.; non-toxic and odorless
Excellent moisture, gas barrier, and flavor retention properties
Good heat sealability and printability
8079 Aluminum Foil for Pharmaceutical Packaging
In pharmaceutical packaging, 8079 aluminum foil is an essential material due to its high barrier and safety performance:
Typical Applications:
Pharmaceutical Foil: Used for blister and tropical-type pharmaceutical packaging
Cold-Forming Foil: Used for high-end pharmaceutical blister packs and high-seal pharmaceutical packaging
Common Specifications and Tempers:
Thickness: 0.016-0.08mm
Width: 100-1600mm
Temper: O, H18, etc.
Performance Requirements:
Extremely high barrier properties to ensure drug stability
Good cold forming performance
Strict surface quality requirements: no pinholes, voids, or corrosion marks
Compliant with hygiene standards for pharmaceutical packaging materials
8079 Aluminum Foil for Battery Soft Packaging
8079 aluminum foil is increasingly used in soft-pack lithium battery fields, especially for high-end battery products:
Typical Applications:
Soft-pack lithium battery aluminum plastic film foil: Used as the middle layer material of aluminum plastic film
Polymer lithium battery packaging aluminum composite film
Common Specifications and Tempers:
Thickness: 0.025-0.055mm; 0.04-0.08mm
Width: 100-1650mm
Temper: O
Performance Requirements:
Excellent thermal and electrical conductivity
High barrier performance to prevent water vapor ingress and electrolyte leakage
Good cold-forming and puncture resistance
Surface tension not less than 32 dynes
Other Industrial Applications
In addition to the above key areas, 8079 aluminum foil also finds wide use in various industrial fields:
Typical Applications:
Tape Foil: Used as a base material for various tapes
Cable Foil: Used for shielding and protection of cables
Decorative Foil: Used for decorative materials and crafts
Common Specifications and Tempers:
Thickness: 0.016-0.4mm
Temper: H18, O, etc.
Performance Requirements:
Good conductivity and opacity
Excellent mechanical workability
Compliance with specific industrial application standards
Comparison Analysis of 8079 Aluminum Foil with Other 8-Series Foils
Classification and Characteristics of 8-Series Aluminum Foil
8-series aluminum alloys are important materials for aluminum foil, mainly including the following common alloys:
8-Series Alloy Classification:
Main Alloys: 8011, 8021, 8079, etc.
Alloy Characteristics: Mainly added with iron and silicon as major alloying elements, featuring moderate strength and good processing performance
Common Advantages: Excellent sealing, plasticity, corrosion resistance, etc.
Application Fields of 8-Series Aluminum Foil:
Widely used in food and beverage, cigarette and pharmaceutical packaging, household daily use, etc.
Especially suitable for packaging applications requiring high barrier properties
Also important in electronics and battery sectors
Comparison Between 8079 and 8011 Aluminum Foil
8011 is the most widely used aluminum foil in the 8-series alloys. Compared with 8079, it has the following characteristics:
Chemical Composition Differences:
Silicon Content: 8011 aluminum foil contains more silicon than 8079
Alloy Elements: 8011 contains manganese and magnesium, which are not present in 8079
Iron Content: 8079 aluminum foil has higher iron content than 8011
Performance Comparison:
Strength: 8011 has higher strength than 8079
Elongation: Under the same temper, 8079 has higher elongation than 8011
Puncture Resistance: 8079 has better puncture resistance than 8011
Processing Performance:
Formability: 8079 offers better deep drawing properties
Surface Treatment: 8011 is easier to treat and coat
Processing Cost: 8011 has relatively lower production cost
Application Fields:
8011 is more widely used in pharmaceutical packaging, food packaging, food containers, tape foil, cable foil, yogurt lid, bottle cap materials, and more
8079 is more suitable for high-end packaging applications that require better elongation and puncture resistance, such as food and pharmaceutical products
Comparison Between 8079 and 8021 Aluminum Foil
8021 aluminum foil is another key 8-series material. Compared with 8079, it has the following characteristics:
Chemical Composition Differences:
Silicon Content: 8021 contains less silicon than 8079
Iron Content: 8021 contains less iron than 8079
Alloy Elements: 8021 does not contain manganese or magnesium, same as 8079
Performance Comparison:
Strength: 8079 has slightly higher strength than 8021
Elongation: 8021 has slightly higher elongation than 8079
Deep Drawing Performance: 8021 offers better deep drawing properties
Processing Performance:
Rolling Process: 8021 is primarily hot-rolled; 8079 can be either hot-rolled or cast-rolled
Formability: 8021 performs better in deep drawing applications
Surface Quality: Both materials can achieve high surface quality
Application Fields:
8021 is mainly used in blister pharmaceutical foil and aluminum-plastic film for new energy battery packaging
8079 is more commonly used in packaging fields requiring higher strength
Both are applied in high-end pharmaceutical packaging, but 8021 is more commonly used in blister and tropical aluminum
Overall Comparison and Selection Recommendations for 8-Series Aluminum Foil
Based on comprehensive comparison of main 8-series aluminum foil materials, the following recommendations can be made:
Overall Performance Comparison:
Strength Ranking: 8011 > 8079 > 8021
Elongation Ranking: 8021 > 8079 > 8011
Deep Drawing Performance: 8021 > 8079 > 8011
Puncture Resistance: 8079 > 8021 > 8011
Cost and Cost-Effectiveness:
Material Cost: 8011 < 8079 < 8021
Processing Cost: 8011 < 8079 < 8021
Cost-Effectiveness Evaluation: Should be assessed according to specific application needs
Application Scenario Recommendations:
General Packaging Applications: Prioritize 8011 for its high cost-effectiveness
Deep Drawing Applications: Prioritize 8021 for its superior formability
High-Strength Packaging Applications: Prioritize 8079 for its balanced strength and elongation
High-End Pharmaceutical Packaging: Choose 8021 or 8079 depending on specific requirements
Battery Soft Pack Applications: 8021 is more commonly used, but 8079 is also applicable under certain requirements
Key Points in Selecting 8079 Aluminum Foil
Selection Guide for 8079 Foil Specifications and Dimensions
Choose appropriate 8079 aluminum foil specifications based on application requirements:
| Selection Factors | Considerations | Common Choices |
| Thickness Selection | Barrier performance requirements, processing performance needs, cost considerations | Food packaging: 0.01–0.02mm; Pharmaceutical packaging: 0.016–0.04mm; Battery pouch: 0.025–0.055mm |
| Width Selection | Equipment limitations, usage efficiency, transportation and storage | Choose appropriate width based on production equipment and material utilization |
| Length Selection | Production batch size, storage conditions, ease of use | Select roll length according to production scale and ease of handling |
8079 Aluminum Foil Temper Selection Guide
Select the appropriate temper state according to application requirements and processing technology:
Formability Requirements and Temper Selection
Deep drawing applications: Generally choose O temper (annealed), offering the best ductility and formability
Simple stamping applications: H22 or H24 tempers are suitable, balancing strength and formability
Non-forming applications: H18 temper is suitable, providing high strength and hardness
Strength Requirements and Temper Selection
High strength requirements: Choose H18 temper for maximum strength and hardness
Moderate strength requirements: Choose H22 or H24 temper
Low strength requirements: Choose O temper, which offers the lowest strength but best ductility
Common Issues and Solutions in the Use of 8079 Aluminum Foil
Surface Quality Issues and Treatment
Potential surface quality issues and solutions during the use of 8079 aluminum foil:
| Issue | Symptom | Cause | Solution |
| Pinhole Problem | Micro holes on the aluminum foil surface | Impurities in raw materials, foreign matter intrusion during rolling | Choose reliable suppliers, perform pinhole inspection before use |
| Oil Stain Issue | Excessive rolling oil residue on foil surface | Poor oil control during rolling, inadequate degreasing process | Use well-treated foil, perform cleaning before use |
| Roll Marks and Uneven Gloss | Cyclic roll marks or uneven gloss on foil surface | Damaged roller surface, improper grinding, insufficient cleaning | Use foil with good surface quality, adjust lamination process parameters |
Processing Performance Issues and Treatment
Potential processing problems and solutions during the manufacturing of 8079 aluminum foil:
| Issue | Symptom | Cause | Solution |
| Forming Cracks | Cracks appearing during deep drawing or stamping | Insufficient ductility of material, improper temper selection | Select suitable temper, adjust processing parameters |
| Wrinkling | Foil shows creases during processing or use | Poor flatness, improper tension control, uneven rewinding | Use foil with good flatness, adjust tension control system of processing equipment |
| Insufficient Lamination Strength | Low peel strength after lamination with other materials | Poor surface treatment, improper lamination process parameters | Use foil with proper surface treatment, adjust lamination temperature, pressure, and time |
Application Performance Issues and Solutions
Potential performance issues and corresponding solutions in the actual application of 8079 aluminum foil:
| Issue | Symptom | Cause | Solution |
| Decline in Barrier Performance | Shortened shelf life of packaged products | Insufficient foil thickness, excessive pinholes, improper lamination process | Select products with appropriate thickness, optimize lamination process |
| Poor Heat Sealing | Unreliable sealing at heat-sealed areas, resulting in air leakage | Inappropriate heat sealing temperature, pressure, or time | Adjust heat sealing parameters, select products with good heat seal performance |
| Corrosion Issues | Corrosion spots appearing on foil during use | Exposure to corrosive substances, high environmental humidity | Choose products with anti-corrosion coatings, improve storage and usage environment |
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