Aluminum foil 25 micron for Pharmaceutical blister
Features of Aluminum Foil 25 Micron for Pharmaceutical Blisters
- Thickness Optimality: The Goldilocks Zone
At 25 microns (0.025 mm), this aluminum foil hits a “sweet spot” in thickness that expertly orchestrates mechanical strength, barrier performance, and formability.
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Mechanical Integrity: Thin yet robust, the 25-micron gauge provides enough tensile strength and puncture resistance—a critical factor when foils face automized high-speed sealing and patient handling (e.g., popping tablets out).
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Flexible Barrier Properties: The foil’s unique atomic lattice structure effectively seals against oxygen, moisture, light, and microbial intrusion—only at this thickness does the material maintain excellent impermeability without sacrificing flexibility.
- Surface Treatments and Compatibility
The pharmaceutical-grade 25-micron aluminum foil often undergoes specialized treatments such as lacquer coating on the drug-facing side to prevent direct metal contact, avoiding drug-foil reactions. Additionally, the external side might accommodate printing layers for branding and dosage info, directly integrated during lamination or coating processes involved in blister manufacturing.
- Thermo-Processability and Sealability
The foil’s thermoformability is precisely engineered to align with polyvinyl chloride (PVC) or polypropylene (PP) forming films to forge blister packs. The foil is compatible with the hot sealing process wherein heat and pressure meld the foil with the drug cavity around pills or capsules, ensuring air-tight sealing.
- Regulatory Compliance and Purity
Material purity of the 25-micron aluminum foil adheres to international pharmacopoeial standards (like USP and EP), every batch undergoes stringent tests for residual metal contaminants, tensile strength, punchability, and interaction omissions to confirm suitability for direct contact conditions.
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