Blister packaging aluminium foil

When sourcing blister foil, you must prioritize Alloy Grade (typically 8011 or 8021) and Temper (H18 for hard foil or O for soft foil). For pharmaceutical applications, the thickness usually ranges from 20 to 30 microns. Ensure the foil has a high moisture and oxygen barrier (WVTR/OTR near zero) to protect sensitive contents. Additionally, verify the Heat Seal Lacquer (HSL) compatibility with your base web material, such as PVC, PVDC, or Alu-Alu, to ensure a hermetic seal.

Since this product is primarily used in the pharmaceutical and food industries, it must meet FDA (Food and Drug Administration) standards or EU Directive 94/62/EC. Suppliers should provide a Drug Master File (DMF) number and hold ISO 15378 certification, which specifically addresses primary packaging materials for medicinal products. Ensure the materials are BPA-free and comply with REACH and RoHS regulations for chemical safety.

High-quality blister foil requires a primer coating that supports clear, legible printing of dosage instructions and branding. Request samples to test ink adhesion and ensure there is no pinhole density exceeding international standards (usually zero pinholes at 20 microns). The surface should be free from oil spots, wrinkles, and scratches to prevent machine downtime during the high-speed packaging process.

PTP (Press Through Packaging) foil is a hard aluminum foil used as a lidding material that breaks easily when pushed. Cold Forming Foil (Alu-Alu) is a multi-layered structure (OPA/Alu/PVC) designed for extreme barrier protection and high ductility, allowing it to be deep-drawn into cavities without cracking. Choose PTP for standard tablets and Alu-Alu for highly hygroscopic or light-sensitive medications.

Always request a Pre-Shipment Inspection (PSI) conducted by a third-party agency like SGS or Intertek. Focus on micrometer thickness verification and laboratory testing for seal strength. For long-term security, use Made-in-China.com's Secured Trading services to ensure payment is only released after the goods pass quality verification.

Aluminum prices are tied to the LME (London Metal Exchange) index, so negotiate a pricing formula based on 'LME + Processing Fee' to ensure transparency. For MOQs (Minimum Order Quantities), which are often high due to rolling mill setups (typically 200kg to 500kg), suggest a trial order or ask the supplier to combine your order with another client's production run to reduce initial costs.

Aluminium foil is highly susceptible to oxidation from sea salt/humidity and physical deformation. Insist on seaworthy packaging, including plastic film wrapping, desiccant silica gel packs, and reinforced wooden crates (suspended core packing). Ensure the Incoterms are clearly defined; CIF or DAP are often preferred for buyers who want the supplier to handle the complexities of international freight and insurance.