What are the key properties of Plain Aluminium Foil 1235 O?
This grade features 99.35% pure aluminum with excellent corrosion resistance and formability. Its "O" temper indicates it's fully annealed, making it extremely soft and malleable. The foil has high thermal conductivity and perfect moisture/light barrier properties. Typical thickness ranges from 0.006mm to 0.2mm for various applications. Its non-toxic nature makes it food-safe according to international standards.
What industrial applications is 1235 O foil commonly used for?
It's widely used in food packaging like chocolate wrappers and yogurt lids due to its hygiene properties. Pharmaceutical companies utilize it for blister packs to protect medicines from moisture. The electronics industry employs it as shielding material and capacitor components. In construction, it serves as vapor barriers and insulation material. Its heat reflectivity also makes it ideal for HVAC systems.
How does the manufacturing process affect 1235 O foil's performance?
The foil undergoes cold rolling to achieve ultra-thin gauges while maintaining structural integrity. Annealing eliminates work hardening, ensuring superior flexibility. Precision tension control during rolling prevents pinholes and ensures uniform thickness. Surface treatments may include lubricants for easier processing. Strict quality checks verify grain structure and surface finish meet ASTM B479 standards.
What advantages does 1235 O have over other aluminum alloys?
Compared to harder alloys like 8011, it offers better elongation (up to 30%) for deep drawing. Its higher purity provides superior corrosion resistance without coating. The O temper allows easier stamping and embossing than H18 temper foils. It has lower electrical resistance than alloyed variants, beneficial for electrical uses. Cost-effectiveness makes it preferable for high-volume packaging applications.
How should 1235 O foil be stored and handled?
Store in dry conditions below 40°C to prevent oxidation or moisture absorption. Use polyethylene interleaving rolls to avoid surface scratches during transport. Handle with clean gloves to prevent oil contamination affecting adhesion. Keep away from acidic/alkaline substances that could cause corrosion. For printing applications, surface treatment like corona discharge may be required for optimal ink adhesion.
