What are the key characteristics of Aluminium Foil Roll 8021?
Aluminium Foil 8021 is a high-performance alloy containing 0.8-1.2% iron and 0.05-0.3% copper for enhanced strength. It offers excellent formability with elongation rates typically between 15-25%. The material demonstrates superior heat resistance up to 300°C, making it ideal for heat-sealing applications. Its pinhole count is remarkably low (<30/m² at 0.02mm thickness). The alloy maintains consistent mechanical properties across various tempers (O, H18, H22).
What are the primary industrial applications of 8021 foil rolls?
This alloy is extensively used in pharmaceutical blister packaging due to its perfect barrier properties. It serves as premium material for flexible food packaging, especially for retort applications. The construction industry utilizes it for HVAC insulation and vapor barriers. In electronics, it's applied in capacitor manufacturing and electromagnetic shielding. Its heat resistance makes it suitable for laminated tubes and container lids.
How does 8021 compare to 8011 alloy in terms of performance?
8021 offers approximately 10-15% higher tensile strength than 8011 at comparable thicknesses. It demonstrates better heat resistance and thermal stability during sealing processes. The 8021 alloy shows improved formability in deep drawing applications. However, 8011 may be more cost-effective for standard packaging needs. Both alloys offer similar corrosion resistance but 8021 has superior pinhole resistance in thin gauges.
What quality standards apply to 8021 aluminium foil production?
Production must comply with ASTM B479 for pharmaceutical applications. Food contact applications require FDA 21 CFR compliance. European markets demand EN 602 certification for packaging materials. Thickness tolerance must maintain ±3% across the entire web width. Surface quality should meet Class A standards with minimal visible defects.
What are the recommended storage conditions for 8021 foil rolls?
Store in controlled environments with temperature maintained at 15-30°C. Relative humidity should be kept below 60% to prevent oxidation. Rolls must be stored horizontally on wooden pallets to prevent deformation. Original moisture-proof packaging should remain intact until processing. Implement FIFO inventory management with maximum storage duration of 12 months for optimal performance.
