Blister film

The choice depends on the barrier requirements of your product. PVC (Polyvinyl Chloride) is the most common and cost-effective for general retail. For pharmaceutical or high-moisture sensitive goods, PVDC-coated PVC or Aclar (PCTFE) laminates provide superior moisture and oxygen barriers. If you are targeting eco-conscious markets, PET (Polyethylene Terephthalate) or PLA (Polylactic Acid) are preferred for their recyclability and lower environmental impact.

You must verify the thickness uniformity (tolerance within ±5%) to ensure consistent heating and forming. The coefficient of friction (COF) should be optimized to prevent sticking in the mold, and the forming temperature range must align with your machinery's capabilities. Additionally, ensure the tensile strength is sufficient to prevent thinning or 'webbing' at the corners of deep-draw cavities.

For food contact, the film must comply with FDA (21 CFR) or EU Regulation No 10/2011. For pharmaceutical applications, look for USP Class VI compliance and ensure the supplier provides a Drug Master File (DMF) number. Always request a Migration Test Report to ensure no harmful chemicals leach into the product.

The film must be compatible with your lidding material (e.g., Aluminum foil or Tyvek). Ensure the heat-seal coating on the lid matches the chemical properties of the film. We recommend requesting sealing strength test reports (ASTM F88) to confirm the bond is strong enough to protect the product but allows for the intended opening mechanism (peelable or push-through).

Blister films, especially PVC and specialized laminates, are sensitive to extreme temperatures and humidity. Ensure the supplier uses UV-protective wrapping and heavy-duty palletizing with desiccants. For long-haul sea freight, specify temperature-controlled containers (Reefers) if shipping to tropical climates to prevent the film from becoming brittle or sticking together (blocking).

Focus on Total Cost of Ownership (TCO) rather than just the price per kilogram. Negotiate based on volume-based pricing tiers (e.g., 1-ton vs. 5-ton orders) and ask for free cylinder/mold engraving for custom embossed films if the annual volume exceeds a certain threshold. Always verify the supplier's Audit Reports on Made-in-China.com to ensure they are a genuine manufacturer and not a middleman.

Use Secured Payment services provided by the platform to ensure funds are only released after you confirm receipt of goods. For first-time bulk orders, it is highly recommended to hire a third-party inspection agency (like SGS or Intertek) to perform a Pre-Shipment Inspection (PSI) to check roll width, thickness, and winding tension before the balance payment is made.

Check the HS Code (typically 3920 or 3921) against your country's latest tariff schedule. Some regions have anti-dumping duties on specific plastic films from China. To ensure smooth customs clearance, require the supplier to provide a detailed Certificate of Origin (CO) and ensure all MSDS (Material Safety Data Sheets) are included in the shipping documentation.