In today’s fast-paced industrial landscape, large aluminium foil rolls have become indispensable across various sectors. From cutting-edge lithium battery production to everyday food and pharmaceutical packaging, the demand for high-quality aluminum foil large rolls is surging.

At Yutwin Aluminium Foil, we take pride in being at the forefront of this dynamic industry. Our production process is a blend of cutting-edge technology and meticulous craftsmanship. Starting with carefully selecting raw materials, we ensure that only the purest aluminium ingots or recycled aluminium materials são usados. The journey continues through advanced melting and casting techniques, precise hot and cold rolling processes, and essential annealing treatments. Each step is closely monitored and controlled to guarantee the exceptional quality of our aluminium foil large rolls.

Our R&D team is dedicated to exploring innovative ways to enhance the performance and applicability of aluminium foil large rolls. We understand the unique challenges different industries face, and our surface treatment technologies são adaptados to meet those specific needs. Whether improving corrosion resistance for harsh environments or optimizing surface properties for better adhesion and functionality, we strive to provide solutions beyond expectations.

At Yutwin Aluminium Foil, we pride ourselves on being at the forefront of large roll manufacturing and innovation of aluminium foil. This guide provides comprehensive insights into our production processes, the diverse applications of our products, and current market trends.

Our Advanced Production Capabilities for Aluminium Foil Large Roll

Yutwin Aluminium Foil produces industry-leading, high-quality aluminium foil large roll products. For instance, we successfully produce 6.3 μm double-zero aluminium foil with ultra-large coil diameters exceeding 2250 mm, all achieved with zero breaks during cold rolling. Our largest single finished coils can reach a net weight of up to 17.08 tons, with a coil diameter of 2295 mm and a remarkable length of 29.95 kilometres, setting advanced standards in the industry.

State-of-the-Art Equipment and Processes

We utilize intelligent aluminium foil rolling mills, which represent the industry’s progression towards larger coils, wider widths, higher speeds, and increased automation.

• Our rolling mill roll bodies exceed 2200 mm in width.
• We achieve cold rolling speeds surpassing 2000 meters per minute.
• Our coil weights reach approximately 20 tons.
• We universally equip our mills with advanced Thickness Control Systems (AGC) and Flatness Control Systems (AFC).

Applications of Yutwin Aluminium Foil Large Roll

Our versatile aluminium foil large roll products cater to various critical industries:

Lithium Battery Industry

Em lithium battery manufacturing, we supply large rolls of aluminium foil as the positive electrode current collector. The quality and performance of our foil significantly impact the battery’s overall performance and safety.

Packaging Industry

Yutwin aluminum foil large rolls are a preferred choice for packaging food, pharmaceuticals, cosmetics, and more. Our foil offers excellent barrier properties against moisture and gases, is light-proof, and is suitable for freezing, effectively extending product shelf life.

Industry Insights & Market Trends for Aluminium Foil Large Roll

We constantly monitor the market to provide our customers with the latest information.

Demanda do mercado

The rapid expansion of new energy vehicle production and energy storage solutions fuels increasing demand for lithium batteries. Consequently, this drives significant market demand for battery-grade aluminium foil large roll.

Price Trends

According to industry sources like AA Aluminium Foil Information, December saw favourable profits for aluminium foil. However, market orders experienced a downturn in January and February, leading to increased inventory. We anticipate that aluminium foil large roll prices might experience some weakness or decline in the first quarter.

Standards and Certifications We Adhere To

Yutwin Aluminium Foil ensures all our large roll aluminium foil products comply with stringent international and national standards:

• GB/T 3198-2020 (Wrought aluminium and aluminium alloy foil): This standard defines terminology, classification, purchasing content, requirements, testing standards, inspection rules, marking, packaging, quality certificates, and order content for aluminium and aluminium alloy foil.
• ASTM B209-2019 (Standard Specification for Aluminium and Aluminium-Alloy Sheet and Plate): This standard (though B479 is more specific for foil, B209 is often cited for general alloy/temper requirements relevant to foil feedstock) outlines requirements for aluminium and aluminium alloy foil, including material composition, properties, and dimensional tolerances.

Yutwin’s Production Process for Aluminium Foil Large Roll

We meticulously control every stage of our aluminium foil extensive roll production process:

1. Raw Material Preparation

We begin with high-purity aluminium ingots or liquid aluminium and can proficiently use and utilize recycled aluminium materials. Before production, we thoroughly pre-treat the aluminium ingots, removing surface oxidation layers and impurities to guarantee the superior quality of the final aluminium foil large roll.

2. Smelting and Casting

• Smelting: We melt aluminium ingots or recycled aluminium materials in advanced smelting furnaces at high temperatures, typically around 700°C. We conduct this process under an inert gas atmosphere to prevent the aluminium melt from oxidizing.
• Casting: We then cast the molten aluminium into billets of specific dimensions. Our standard casting methods include flat ingot casting and twin-roll continuous casting.
  • Flat Ingot Casting: We use this method to cast the aluminium liquid into flat ingots. Subsequently, we perform milling and homogenization to remove surface oxides and impurities, ensuring a uniform microstructure that prepares the material for subsequent hot rolling.
  • Twin-Roll Continuous Casting: We pour molten aluminium directly between two rotating casting rolls. This innovative method completes solidification and hot rolling within 2-3 seconds, producing plates 4-7mm thick. While this method is cost-effective by bypassing many complex hot-rolling steps, we carefully manage and mitigate potential issues like internal looseness or non-uniformity in the cast strip.

3. Rolling Operations

• Hot Rolling: We subject the cast ingots or continuously cast slabs to hot rolling at high temperatures. This process deforms them into aluminium plates of a specific thickness and width, crucially improving their internal structure and mechanical properties for the subsequent cold rolling stages.
• Cold Rolling: We cool the hot-rolled aluminium plates at room temperature. This operation further reduces the plate thickness and significantly enhances strength and hardness. Throughout the cold rolling process, we precisely control rolling force, speed, and roll temperature to ensure the large aluminium foil roll exhibits uniform thickness and exceptional surface quality.
• Rough, Intermediate, and Finish Rolling: After creating the initial aluminium foil blank, we employ a sequence of rough, intermediate, and finish rolling processes. The specific sequence depends on the target thickness and precision level of the large aluminium foil roll. Thicker foils might only require rough rolling. Single-zero foils typically undergo rough and intermediate rolling, while high-precision double-zero foils, like those used in batteries, demand meticulous rough, intermediate, and finish rolling passes.

4. Annealing

• Intermediate Annealing: During the intensive cold rolling stages, internal stresses build up within the aluminium foil. We perform intermediate annealing to eliminate these stresses and improve the foil’s plasticity and ductility. This involves carefully heating the large roll of aluminium foil under controlled atmospheric conditions, holding it at a specific temperature, and then slowly cooling it. This process restores the foil’s molecular structure and enhances its overall processability for subsequent rolling.
• Finish Annealing: After the final finish rolling pass, we conduct a finish annealing process on the large roll of aluminium foil. This critical step removes residual stress, maximises the foil’s toughness and ductility, and ensures it meets its intended application’s precise mechanical properties and performance requirements.

5. Surface Treatment

To cater to diverse customer and application needs, we can apply various surface treatments to the aluminium foil large roll:

• Revestimento: Enhances corrosion resistance and oxidation resistance, and provides decorative finishes.
• Chemical Treatment: Modifies surface properties such as wettability (hydrophilic or hydrophobic).
• Slitting: We precisely slit the large master coils into narrower rolls according to customer-specified widths and dimensions.

6. Inspection and Packaging

• Quality Inspection: At Yutwin Aluminium Foil, we conduct comprehensive quality inspections on every large roll of aluminium foil. These include precise thickness measurements, tensile strength testing, surface defect inspection, and other relevant tests to ensure every product meets stringent industry standards and specific customer requirements.
• Packaging and Storage: We carefully package qualified aluminium foil large roll products using appropriate moisture-proof and anti-oxidation packaging materials. We then store them in dry, well-ventilated warehouses, ensuring they remain pristine until we deliver them to our customers.

Purposes of Surface Treatment for Yutwin Aluminium Foil Large Roll

We apply surface treatments to our aluminium foil large roll products to achieve several key objectives:

1. Enhance Corrosion Resistance

While aluminium naturally forms a protective oxide layer in air, specific environments demand greater protection. We apply surface treatments like passivation or anti-rust coatings to bolster its corrosion resistance further and prevent oxidation or rust under various conditions (e.g., humid, acidic, or alkaline environments). Esse significantly extends the service life of the aluminium foil large roll.

2. Improve Surface Properties

• Increase Adhesion: We can apply coating treatments or chemical modifications to alter the foil’s surface’s microscopic structure and chemical nature. This allows inks, adhesives, and other coatings to bond more effectively, which is crucial for applications like printed food packaging or adhesive aluminium foil tapes.
• Adjust Surface Wettability: Through specific surface treatments, we can tailor the aluminium foil’s surface to achieve the desired level of hydrophilicity (water-attracting) or hydrophobicity (water-repelling). For instance, some electronic components require a hydrophobic surface to prevent moisture accumulation, while specific liquid packaging applications benefit from a hydrophilic surface for good liquid contact.

3. Impart Special Functions

• Enhance Electrical Conductivity: Specific surface treatments can form a more conductive film on the foil for electronic applications, such as the aluminium foil we supply for battery current collectors. This further boosts its electrical conductivity, improving the performance of batteries and other electronic products.
• Improve Thermal Insulation: We can form a layer with high thermal insulation properties on the aluminium foil surface by applying special coatings or creating composite structures. Esse makes our aluminium foil large roll highly effective in applications like building insulation materials and cold chain logistics packaging.
• Achieve Decorative Effects: We can apply colour coatings, plating, and other decorative treatments to the large roll of aluminium foil, offering various colours and gloss levels. This meets the aesthetic requirements of diverse products, enhancing their visual appeal for applications in home decoration, gift packaging, and more.

4. Meet Specific Project Requirements

• Food Packaging Applications: Our surface treatments ensure the aluminium foil large roll complies with stringent food hygiene standards in the food packaging industry. Esse prevents harmful substances from migrating from the foil to the food and ensures that food components do not adversely affect the foil.
• New Energy Applications: Yutwin’s surface-treated aluminium foil plays a significant role in lithium batteries in new energy vehicles, acting as the positive electrode current collector. Our specialized treatments improve their compatibility with active battery materials, enhancing battery cycle life and safety.

Yutwin Aluminium Foil is a reliable partner committed to excellence in the ever-evolving world of aluminium foil production. Our large rolls of aluminium foil, with their remarkable quality and diverse applications, are set to meet the growing demands of industries worldwide.

We are excited to see the future developments in the aluminium foil industry. As technology advances and market requirements become more stringent, Yutwin Aluminium Foil will continue to push the boundaries of innovation. Our investment in research and development ensures that we are always prepared to deliver the next generation of aluminium foil products.

We invite you to join us on this continuous improvement and discovery journey. Whether you are a long-standing customer or new to our brand, Yutwin Aluminium Foil is here to provide you with the highest-quality aluminium foil large rolls and the most comprehensive solutions. Thank you for choosing Yutwin Aluminium Foil. Together, let’s shape a brighter future with aluminium foil large rolls.

Contact Yutwin Aluminium Foil today to discuss your aluminium foil large roll requirements!