cap for infusion bottle Manufacturers

Infusion bottle caps must be made from medical-grade materials, typically a combination of aluminum alloy (8011-H16/H14) and polypropylene (PP) for flip-off styles. The rubber liner or gasket must be brominated butyl rubber, which is preferred over chlorobutyl rubber for its superior chemical stability and lower extractable profile, ensuring no contamination of the intravenous fluid.

You must verify that the caps can withstand high-pressure steam sterilization (autoclaving), usually at 121°C for 30 minutes, without deformation or loss of seal integrity. If your process involves Ethylene Oxide (ETO) or Gamma radiation, you must request specific test reports from the supplier to ensure the plastic components do not become brittle or discolored.

The cap must feature a tamper-evident design to ensure the integrity of the medication. For flip-off caps, the bridge-breaking force should be consistent (typically between 5-20N) to allow healthcare professionals to open them easily while preventing accidental removal. Additionally, the puncturability of the rubber stopper must allow for smooth needle insertion with minimal fragmentation (coring).

Suppliers should ideally hold ISO 15378 certification, which specifically addresses primary packaging materials for medicinal products. Furthermore, products must comply with USP <661> (Physicochemical Tests for Plastics) and EP 3.2.2 standards. Ensure the manufacturer is registered with the FDA (DMF - Drug Master File) if you are exporting to the US market.

Request a Vacuum Leak Test report and a Moisture Vapor Transmission Rate (MVTR) analysis. A high-quality cap must maintain a hermetic seal to prevent microbial ingress and maintain the sterility of the infusion liquid throughout its shelf life.

Implement a Pre-Shipment Inspection (PSI) protocol conducted by a third party. Focus on AQL (Acceptable Quality Level) 0.1 or 0.25 for critical defects like cracks or contamination. On Made-in-China.com, you can utilize Audited Suppliers who have undergone on-site verification to ensure their production environment meets GMP (Good Manufacturing Practice) standards.

Instead of focusing solely on the lowest unit price, negotiate for batch consistency and price stability over a 12-month period. Request the supplier to provide a Certificate of Analysis (COA) for every single batch. For large volumes, aim for a 5-10% discount by committing to an annual volume while scheduling shipments quarterly to manage inventory costs.

Ensure the HS Code is correctly classified (typically 392350 for plastic caps or 761210 for aluminum). Because these are medical components, customs may require a Declaration of Conformity. Use clean-room grade double-layer PE bag packaging inside the shipping cartons to prevent dust accumulation during transit.

Always use secure payment terms such as Letter of Credit (L/C) for large orders or Escrow-based payment services provided by Made-in-China.com. This ensures that funds are only released once the shipping documents and inspection certificates are verified, protecting your capital from non-compliance risks.