High Purity 8011 Aluminum Foil 90µm

Product Overview

High-purity 8011 aluminum alloy foil with a thickness of 90µm is an advanced material specifically designed for demanding packaging and industrial applications. This product is manufactured using a precise alloy formula and state-of-the-art rolling technology, perfectly combining the inherent light weight and high barrier properties of aluminum with enhanced mechanical strength. Its 90µm (0.09mm) thickness specification achieves an ideal balance between excellent moisture, oxygen, and light barrier properties, and good cost-effectiveness and process adaptability. As a core material in pharmaceutical blister packaging, aseptic food packaging, high-end capacitors, and building insulation, it ensures product safety, long shelf life, and superior performance.

1. Understanding 8011 Aluminum Alloy – The Ingenious Formula of Materials Science

1.1 The Origin and Standardization of 8011 Aluminum Alloy

8011 aluminum alloy belongs to the 8xxx series, which primarily uses iron (Fe) and silicon (Si) as the main alloying elements. Compared to pure aluminum, the precise control of the addition ratios of iron, silicon, and other trace elements significantly enhances the strength, hardness, and formability of the 8011 alloy while retaining aluminum’s inherent advantages of light weight, corrosion resistance, high electrical and thermal conductivity. It is a non-heat-treatable strengthening alloy that exhibits extremely high flexibility in the annealed (O temper) state and good tensile strength in the hard temper (H18, etc.). Its chemical composition typically complies with international standards such as GB/T 3190, ASTM B479, and EN 573, ensuring the reliability and consistency of material performance.

1.2 The Mechanism of Action of Key Alloying Elements

• Iron (Fe): Forms stable intermetallic compounds with aluminum (e.g., FeAl₃). Appropriate addition effectively increases the alloy’s strength and hardness, but excessive iron can lead to increased brittleness. In the 8011 alloy, the iron content is precisely controlled within a range that optimizes the comprehensive properties of the material.
• Silicon (Si): The addition of silicon helps improve the casting fluidity of the alloy. During processing, the phases formed by silicon and iron, such as α(AlFeSi) or β(AlFeSi), have a decisive influence on the final mechanical properties and surface quality of the material.
• Control of Trace Impurities: High-purity 8011 aluminum foil imposes extremely strict controls on the content of impurity elements such as copper (Cu), zinc (Zn), and manganese (Mn). This directly affects its corrosion resistance (especially oxidation resistance), stability during processing, and the final product’s surface gloss.

Table 1: Typical Chemical Composition of 8011 Aluminum Alloy (Weight Percentage, %)

2. In-depth Analysis of the Core Properties of 90µm 8011 Aluminum Foil

The 90µm (i.e., 0.09 millimeters) thickness is a “golden balance point” in the application of 8011 aluminum foil. This specification perfectly balances multiple conflicting requirements, making it the preferred choice in numerous industrial fields.

2.1 Advantages in Mechanical Properties

8011 aluminum foil with a thickness of 90µm can exhibit a broad spectrum of mechanical properties through different heat treatment states (e.g., O temper, H18 temper).

• O Temper (Annealed): Excellent flexibility and elongation, facilitating secondary processing like deep drawing and laminating.
• H18 Temper (Full Hard): Relatively high tensile strength and yield strength, good rigidity, suitable for applications requiring certain supporting force and shape retention.
• Balance of Strength and Flexibility: The 90µm thickness provides sufficient mechanical strength and puncture resistance (e.g., in pharmaceutical blister packaging), while being thin and light enough for easy bending, folding, and adhesion, reducing the risk of breakage on high-speed automatic packaging lines.

2.2 Exceptional Barrier Properties

One of the core functions of aluminum foil is to provide perfect barrier protection. 90µm thick 8011 aluminum foil excels in this regard:

• Light and UV Barrier: Completely blocks light, effectively protecting light-sensitive contents (e.g., pharmaceuticals, food, photosensitive materials) from photodegradation.
• Moisture and Gas Barrier: Provides an almost absolute barrier against water vapor and oxygen, preventing product moisture absorption, oxidation, and spoilage, significantly extending shelf life.
• Aroma Retention and Odor Prevention: Effectively preserves the original flavor of products and blocks the penetration of external odors.

Table 2: Typical Physical and Mechanical Properties of 90µm 8011 Aluminum Foil (Reference Values)

2.3 Excellent Surface Characteristics and Processing Adaptability

High-purity 8011 aluminum foil has a clean, bright, and oil-stain-free surface. The 90µm thickness provides a good foundation for surface treatment:

• Printing and Coating: Moderate surface tension facilitates high-quality printing (e.g., gravure) and the application of functional coatings (e.g., heat-seal adhesives, protective lacquers) with strong adhesion.
• Lamination Processing: Exhibits excellent bond strength and lamination flatness when combined with materials like paper, plastic films (e.g., PE, PP, PET), and non-woven fabrics.
• Stamping and Forming: Possesses good deep-drawing performance and forming stability during processes like blister packaging and food container molding, resisting cracking or wrinkling.

3. Precision Manufacturing Process – From Casting to Fine Rolling

The production of high-quality 90µm 8011 aluminum foil is a complex industrial chain integrating metallurgical technology, precision machinery, and automatic control.

3.1 Melting and Cast Rolling

High-purity primary aluminum ingots are used, with alloying elements precisely added in computer-controlled melting furnaces. The melt undergoes efficient online degassing and filtration (e.g., using ceramic filter plates) to remove hydrogen gas and impurity particles, ensuring internal metal purity. Subsequently, a uniform thin slab is formed via a cast-rolling mill.

3.2 Cold Rolling and Thickness Control

The slab is gradually reduced to the target thickness through multiple passes of cold rolling. The 90µm specification belongs to the thinner foil category, imposing extremely high demands on rolling precision. Modern foil rolling mills are equipped with advanced AGC (Automatic Gauge Control) systems and shape meters, ensuring thickness tolerance is controlled within ±5% or even narrower, with excellent flatness across the width.

3.3 Heat Treatment (Annealing)

Annealing is the key process determining the final properties of the aluminum foil. By precisely controlling the annealing temperature curve and time, work hardening can be completely eliminated to obtain soft O temper foil; or various temper states between soft and hard can be achieved through partial annealing to meet different customer needs.

3.4 Slitting and Inspection

The wide master coil is slit into finished coils of various widths according to order requirements by high-precision slitting machines. The entire process involves online and offline inspections including: thickness measurement (micrometer or radiation gauge), pinhole inspection (under strong light in a darkroom), visual surface quality inspection, and sampling tests for mechanical properties.

Table 3: Typical Production Specification Range for 90µm 8011 Aluminum Foil

4. Diverse Application Fields and Material Selection Comparison

Thanks to its outstanding comprehensive properties, 90µm 8011 aluminum foil is widely used in various corners of the national economy and daily life. To help you more precisely select the most suitable aluminum foil material for specific applications, the following compares 8011 aluminum alloy with other commonly used grades on key performance aspects.

4.1 Pharmaceutical Packaging Field

This is one of the most demanding fields for materials. 90µm 8011 aluminum foil is mainly used for:

• Pharmaceutical Blister Packaging: As the lidding foil (commonly called “aluminum foil”) sealed to hard films like PVC/PVDC, requiring extremely high seal integrity, cleanliness, tear resistance, and easy-open features (via laser scoring or peelable lines).
• Granule/Powder Sachets: As the middle barrier layer in composite pouches.
• Medical Device Sterilization Packaging: Used as the aluminum foil layer in making “Tyvek®” composite bags, providing a sterile barrier.

4.2 Food and Beverage Packaging Field

• Aseptic Cartons: In packages like Tetra Pak and Combibloc, aluminum foil is the core layer blocking light and air.
• Composite Flexible Packaging: For high-end snacks, coffee, milk powder, condiments, etc., to preserve flavor and prevent moisture.
• Food Container Lids: For yogurt cups, jelly cups, etc., easy to peel and heat-seal.
• Meal Containers: Can be used as ovenable trays or tray lids.

4.3 Industrial and Special Application Fields

• Capacitor Electrode Foil: Has special requirements for purity, surface quality, and mechanical properties.
• Battery Current Collector: For some lithium batteries and supercapacitors.
• Building Insulation Materials: As the substrate for composite reflective insulation materials.
• Labels and Decoration: For electronic product labels, wine labels, gift packaging, etc.

Table 4: Performance Focus of 90µm 8011 Aluminum Foil in Different Applications

4.4 Core Comparison with Common Aluminum Foil Grades

Choosing the correct aluminum alloy grade is crucial for product success. The table below compares 8011 aluminum foil​ with also common 3003, 1235, and 8079​ aluminum foils on key characteristics to highlight the unique positioning of the 90µm 8011 foil specification.

Table 5: Comparison of 8011 Aluminum Foil with Other Common Grades (Taking 90µm thickness O temper as example)

Material Selection Summary:

• Choose 8011 aluminum foil, especially the 90µm​ thickness, when you need an “all-rounder”​ material seeking the optimal balance between barrier properties, processability/formability, mechanical strength, and cost. It is a reliable and economical choice​ for general pharmaceutical and food packaging.
• Consider 8079 aluminum foil​ if pursuing ultimate barrier properties (lowest pinhole rate)​ and budget allows.
• 1235 aluminum foil​ is more suitable if extremely high softness​ is required for extreme deep drawing.
• Consider 3003 aluminum foil​ if higher rigidity, stiffness, and strength​ are needed.

5. Selection and Usage Guide – Frequently Asked Questions (FAQ)

Q1: What parameters should be focused on when purchasing 8011 aluminum foil for pharmaceutical blister packaging?

A1:​ Focus on pinhole density​ (requires extremely low), thickness uniformity, surface cleanliness and microbial limits​ compliant with pharmacopoeial standards (e.g., YBB standards), and heat seal strength​ and easy-open performance​ suitable for high-speed automatic packaging lines. It is essential to request authoritative test reports compliant with relevant standards from the supplier.

Q2: What are the advantages of the 90µm thickness compared to thinner (e.g., 70µm) or thicker (e.g., 110µm) specifications?

A2:​ The 90µm thickness achieves the best balance between performance and cost. Compared to thinner specifications (e.g., 70µm), it offers higher mechanical strength and more reliable barrier properties; compared to thicker specifications (e.g., 110µm), it provides sufficient strength while being lighter, more flexible, more economical, and offers better processing adaptability.

Q3: What is the specific impact of “high purity” on the corrosion resistance of aluminum foil?

A3:​ “High purity” refers to strict control of the iron/silicon ratio and impurity elements like copper. A high-purity aluminum substrate forms a denser and more stable oxide film, fundamentally enhancing the material’s resistance to chemical corrosion and pitting corrosion. This ensures safety and appearance when packaging acidic, alkaline, or salt-containing contents throughout the shelf life.

Q4: Which temper of aluminum foil should be chosen for composite packaging? What precautions should be taken?

A4:​ It is recommended to use O temper (Annealed)​ aluminum foil for lamination, as its excellent ductility results in high lamination flatness and less risk of warping. Before lamination, ensure the aluminum foil surface is clean and free of oil contamination. Corona treatment may be necessary, and strictly control the tension, temperature, and pressure during the lamination process.

Q5: How to evaluate whether an 8011 aluminum foil supplier is reliable?

A5:​ A reliable supplier should possess: 1. Complete system certifications​ (e.g., ISO 9001, food/pharmaceutical-grade qualifications if applicable); 2. Advanced rolling and testing equipment; 3. Full-process quality control capability from melting/casting to finished product; 4. A clear quality traceability system; 5. The ability to provide professional application support and customization services.

6. A Globally Trusted Partner – Henan Huawei Aluminum Co., Ltd.

On the path to pursuing quality and reliable supply, Henan Huawei Aluminum Co., Ltd. has always been a trusted strategic partner for global customers. We are not merely an aluminum product manufacturer but an industry leader focused on innovation and application solutions for aluminum sheet, strip, and foil materials.

Our Core Advantages:

• Scaled Manufacturing Strength: The company possesses internationally advanced aluminum sheet, strip, and foil production lines, including modern melting/casting lines, high-precision cold rolling mills, foil rolling mills, and complete finishing equipment. With an annual production capacity of hundreds of thousands of tons of high-quality aluminum products, we ensure stable, large-volume supply.
• Full-Process Quality Control: From the incoming inspection of high-purity raw materials to precision rolling and final slitting/packaging, every process is under strict monitoring of international quality management systems. Our testing center is equipped with comprehensive physical property, chemical analysis, and surface inspection instruments, ensuring every coil of 8011 aluminum foil shipped meets or even exceeds customer standards.
• Deep Technical Expertise: Our technical team has in-depth research on the relationship between microstructure and macroscopic properties of 8011 and other aluminum alloys. We can provide customers with comprehensive technical support ranging from material selection and process parameter suggestions to application problem diagnosis. We are particularly adept at recommending the most suitable alloy temper and specification based on the customer’s final application (e.g., specific packaging type determined after comparison).
• Flexible Market Response: We can provide product services ranging from standard specifications to highly customized ones. Our offerings are not limited to 8011 aluminum foil; we can also supply various grades such as 3003, 1235, and 8079​ to meet your precise selection needs after comparison. We respond quickly to the needs of customers in different global markets.
• Sustainable Development Philosophy: We are committed to green production by optimizing processes to reduce energy consumption and actively promoting the recycling and reuse of aluminum materials, providing customers with environmentally friendly product choices.