Overview
ISO 8872:2022 specifies general requirements and test methods for aluminium caps and aluminium/plastic caps used on infusion bottles and injection vials. This third edition (2022) integrates previous related guidance (including ISO 10985), adds type drawings and explicit test requirements, and defines material, dimensional and functional criteria to assure container/closure integrity and safe use.
Key technical topics and requirements
- Scope and materials
- Applies to aluminium and aluminium/plastic caps delivered sterile or non‑sterile.
- Aluminium components are coated (lacquer/polymer) and must meet defined mechanical and chemical requirements.
- Mechanical characteristics
- Aluminium mechanical grades A, B and C are defined with proof stress and tensile strength limits (see Table 1 in the standard).
- Plastic components intended for steam sterilization must withstand 121 °C for 30 min and short exposure to 130 °C (max. 5 min); irradiation‑sterilizable plastics must retain mechanical properties.
- Dimensional and manufacturing controls
- Dimensions/tolerances reference ISO 8362/ISO 8536 family standards (appropriate part depending on bottle/vial type).
- Controls for contamination, burrs, bite marks and mould flash are required.
- Functional requirements
- Opening and tear‑off forces for aluminium and aluminium/plastic caps are specified and tested (test methods in clause 5.6 and Annex B).
- Joining integrity between aluminium and plastic components must ensure complete joining.
- Earing (edge waviness) limits: if present, must not exceed 3% (measured per clause 5.5).
- Mechanical behaviour after sterilization is assessed (clause 5.7), including coating stability and premature opening/deformation tests.
- Testing and conformity
- Test methods cover mechanical testing, chemical analysis, dimensions, earing, opening/tear‑off forces and sterilization effects (clauses 5.1–5.7).
- Packaging and marking provisions are addressed.
Practical applications and users
- Who uses ISO 8872:2022
- Medical device and pharmaceutical closure manufacturers
- Quality engineers and test laboratories validating cap performance
- Regulatory and procurement teams specifying caps for infusion and injection systems
- Sterilization validation specialists ensuring caps withstand processing
- Why it matters
- Ensures consistent cap performance (secure crimping, safe tear‑off, no sharp exposed edges)
- Supports regulatory compliance, supplier specification and product safety for sterile drug delivery systems
Related standards
Keywords: ISO 8872:2022, aluminium caps, aluminium/plastic caps, infusion bottles, injection vials, test methods, opening forces, sterilization, earing, cap dimensions.
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